Fry counting system and fry counting method

文档序号：1632194 发布日期：2020-01-17 浏览：32次中文

阅读说明：本技术 鱼苗计数系统及鱼苗计数方法 (Fry counting system and fry counting method ) 是由李蓉菁蔡宛铢于 2018-08-01 设计创作，主要内容包括：一种鱼苗计数系统及鱼苗计数方法,鱼苗计数系统包括用以放置水及多个鱼苗的待测鱼苗水箱、供鱼苗从待测鱼苗水箱流出的水路直管、前后设置于水路直管外的二光学检测装置及连接二光学检测装置的中央计算装置。第一光学检测装置持续朝向水路直管投射第一光信号并接收第一反射信号,第二光学检测装置持续朝向水路直管投射第二光信号并接收第二反射信号。中央计算装置接收第一反射信号及第二反射信号,并检测第一反射信号及第二反射信号分别被鱼苗遮蔽而衰减信号强度的第一信号及第二信号,再藉由第一信号与第二信号的时间差判断鱼苗通过水路直管并记录鱼苗数量。(A fry counting system comprises a fry water tank to be measured for placing water and a plurality of fries, a water channel straight pipe for allowing the fries to flow out of the fry water tank to be measured, two optical detection devices arranged in front and at back outside the water channel straight pipe, and a central computing device connected with the two optical detection devices. The first optical detection device continuously projects a first optical signal towards the water path straight pipe and receives a first reflection signal, and the second optical detection device continuously projects a second optical signal towards the water path straight pipe and receives a second reflection signal. The central computing device receives the first reflection signal and the second reflection signal, detects the first signal and the second signal of which the first reflection signal and the second reflection signal are respectively shielded by the fry to attenuate the signal intensity, judges that the fry passes through the waterway straight pipe according to the time difference of the first signal and the second signal and records the number of the fry.)

1. A fry counting system, comprising:

the fry water tank to be tested is used for placing water and a plurality of fries, and an output port for the plurality of fries to pass through is arranged at the bottom of the fry water tank to be tested;

the waterway straight pipe is arranged corresponding to the output port, the pipe diameter of the waterway straight pipe is arranged corresponding to a reference fry length of the plurality of fries, and a first group of detection holes and a second group of detection holes are arranged on the pipe wall of the waterway straight pipe;

the first optical detection device is arranged outside the straight waterway pipe, continuously projects a first optical signal corresponding to the first group of detection holes and receives a first reflection signal;

a first retro-reflection plate, disposed corresponding to the first optical detection device, for reflecting the first optical signal as the first reflection signal;

the second optical detection device is arranged outside the straight waterway pipe, continuously projects a second optical signal corresponding to the second group of detection holes and receives a second reflection signal;

the second retro-reflection plate is arranged corresponding to the second optical detection device and reflects the second optical signal into a second reflection signal; and

and the central computing device is connected with the first optical detection device and the second optical detection device, continuously receives the first reflection signal and the second reflection signal, detects a first signal that the first reflection signal is shielded by the fries to attenuate the signal intensity and a second signal that the second reflection signal is shielded by the fries to attenuate the signal intensity, judges that the fries pass through the waterway straight pipe according to the time difference between the first signal and the second signal, and records the number of the fries.

2. The fry counting system of claim 1, wherein a distance between the first set of detection holes and the second set of detection holes is determined according to the reference fry length.

3. The fry counting system of claim 2, wherein the distance between the first set of detection holes and the second set of detection holes is at least 1.3 to 1.7 times the reference fry length.

4. The fry counting system of claim 2, wherein the diameter of the waterway straight tube is at least 0.2-0.3 times the reference fry length.

5. The fry counting system of claim 2, further comprising a fry collecting tank disposed corresponding to a water outlet of the straight waterway pipe, wherein the fry collecting tank is provided with a fine net to separate a first water layer and a second water layer, wherein the plurality of fries flowing into the fry collecting tank through the straight waterway pipe are separated from the first water layer by the fine net.

6. The fry counting system of claim 5, further comprising a water pumping device comprising a water pipe and a pump, wherein one end of the water pipe is connected to the fry tank to be tested, the other end of the water pipe is connected to the fry collecting tank, and the pump is connected to the water pipe and is used for pumping the water in the second water layer and transferring the water to the fry tank to be tested through the water pipe.

7. The fry counting system of claim 6, further comprising an oxygen supply device having an outlet connected to an opening in the water tube for injecting oxygen into the water tube.

8. The fry counting system of claim 6 wherein the fry tank under test comprises a fry tank level sensor connected to the water pumping device, the water pumping device increasing the rate of pumping water when the fry tank level sensor senses that the water level in the fry tank under test is below a first predetermined water level.

9. The fry counting system of claim 6, wherein the fish tank comprises a fish tank level sensor connected to the water pumping device, and the water pumping device stops pumping water when the fish tank level sensor senses that the water level in the fish tank is lower than a second water level predetermined value.

10. The fry counting system of claim 2, wherein the central computing device issues a warning message when the first reflected signal and the second reflected signal are determined to be maintained at an initial signal strength for a first threshold time.

11. The fry counting system of claim 2 wherein the central computing device records a first arrival time when the first signal is detected, records a first departure time when the first reflected signal returns to an initial signal strength, records a second arrival time when the second signal is detected, and records a second departure time when the second reflected signal returns to the initial signal strength.

12. The fry counting system of claim 11, wherein the central computing device records the fry count +1 when the second arrival time is later than the first departure time.

13. The fry counting system of claim 11, wherein the central computing device calculates a fry length of the fries according to a first calculation formula, and calculates a passing time of the fries through the first optical detection device according to a second calculation formula;

wherein the first calculation formula is:

wherein the second calculation formula is: t ═ T_a2-T_a1(ii) a T is the passing time.

14. The fry counting system of claim 13, wherein the central computing device computes the fry length and the pass time of the fries when the second arrival time of the fries is earlier than or equal to the first departure time, computes a first predicted value according to a third computation formula, and computes a second predicted value according to a fourth computation formula;

wherein the third calculation formula is: (M-0.5). times.L_ref＜L≤(M+0.5)×L_ref(ii) a M is the first predicted value, L_refIs the reference fry length, L is the fry length, and the first predicted value is a positive integer;

wherein the fourth calculation formula is: (N-0.5). times.T_avg＜T≤(N+0.5)×T_avg(ii) a N is the second predicted value, T_avgIs an average transit time, T is the transit time, and the second predicted value is a positive integer;

wherein, the central computing device records the fry quantity according to Min (M, N).

15. A fry counting method is applied to a fry counting system and is characterized in that the fry counting system comprises a fry tank to be detected, a waterway straight pipe, a first optical detection device, a second optical detection device and a central calculation device, wherein the fry tank is provided with an output port through which a plurality of fries pass, the waterway straight pipe is arranged corresponding to the output port, the first optical detection device and the second optical detection device are arranged outside the waterway straight pipe, the central calculation device is connected with the first optical detection device and the second optical detection device, the pipe diameter of the waterway straight pipe is arranged corresponding to a reference fry length of the plurality of fries, and the fry counting method comprises the following steps:

a) the first optical detection device continuously projects a first optical signal corresponding to a first group of detection holes on the pipe wall of the waterway straight pipe and receives a first reflection signal reflected by a first return reflection plate;

b) the second optical detection device continuously projects a second optical signal corresponding to a second group of detection holes on the pipe wall of the waterway straight pipe and receives a second reflection signal reflected by a second retro-reflection plate;

c) the central computing device continuously receives the first reflection signal and the second reflection signal through the first optical detection device and the second optical detection device; and

d) the central computing device detects a first signal of the first reflection signal which is shielded by the fries and attenuates the signal intensity and a second signal of the second reflection signal which is shielded by the fries and attenuates the signal intensity, judges that the fries pass through the waterway straight pipe according to the time difference between the first signal and the second signal and records the number of the fries.

16. The fry counting method of claim 15, wherein in step d), the central computing device records a first arrival time when the first signal is detected, records a first departure time when the first reflected signal returns to an initial signal strength, records a second arrival time when the second signal is detected, and records a second departure time when the second reflected signal returns to the initial signal strength.

17. The fry counting method of claim 16, wherein in the step d), the central computing device records the fry number +1 when the second arrival time is later than the first departure time.

18. The fry counting method of claim 16, wherein in the step d), the central computing device further calculates a fry length of the fries according to a first calculation formula, and calculates a passing time of the fries through the first optical detection device according to a second calculation formula;

wherein the first calculation formula is:

wherein the second calculation formula is: t ═ T_a2-T_a1(ii) a T is the passing time.

19. The fry counting method of claim 18, wherein in the step d), the central computing device calculates the fry length and the passing time of the fries when the second arrival time of the fries is determined to be earlier than or equal to the first departure time, calculates a first predicted value according to a third calculation formula, and calculates a second predicted value according to a fourth calculation formula;

wherein, the central computing device records the fry quantity according to Min (M, N).

20. The fry counting method of claim 15, wherein the distance between the first set of detecting holes and the second set of detecting holes is at least 1.3-1.7 times the length of the reference fry, and the diameter of the straight waterway pipe is at least 0.2-0.3 times the length of the reference fry.

Technical Field

The invention relates to a counting system and a counting method, in particular to a fry counting system and a fry counting method.

Background

Generally, when buying and selling fry, the number of fry is calculated mainly manually. However, the fry has small volume and large quantity, thousands of fry can be obtained, and the fry cannot have economic benefit if being simply calculated in a manual mode.

Moreover, if the number of the fries is calculated manually, the calculation result may have a large error. The economic value of part of the fry is quite high nowadays, and if the error between the calculation result and the actual quantity is too large, the seller or buyer will suffer from the hard-to-bear loss.

In order to solve the above-mentioned problems caused by manually counting the number of fries, various automatic fry counting devices have been available on the market. In such a fry counting device, a sensor is usually disposed on a water channel, so that the fries pass through the water channel one by one, and the passing fries are detected by the sensor and counted one by one.

However, in order for the sensor to successfully sense the passing fry, such fry counting device must control the fry to pass through the water channel in sequence, and when a plurality of fries pass through in an overlapping manner, the sensor will not count correctly. Therefore, when the number of the fry is too large, the fry counting device is not used.

Furthermore, the partial automatic fry counting device captures the image of the fry and obtains the number of the fry through image recognition. Such devices typically place the fry in a bowl and dish and carry the bowl and dish on a conveyor belt, which must be stationary during image capture and thus not continuously counted. If the number of the fish fries in the bowl and the dish is too large, the image identification accuracy is reduced; on the contrary, if the number of the fries in the bowl and the plate is small, the counting time is greatly increased due to the stopping/starting of the conveyer belt.

Disclosure of Invention

The present invention is directed to a fry counting system and a fry counting method, which can sense the fry by the signal intensity of the optical signal and accurately count the number of the fry.

In order to achieve the above object, the fry counting system of the present invention mainly comprises:

a first retro-reflection plate, disposed corresponding to the first optical detection device, for reflecting the first optical signal as the first reflection signal;

the second retro-reflection plate is arranged corresponding to the second optical detection device and reflects the second optical signal into a second reflection signal; and

As described above, the distance between the first set of inspection holes and the second set of inspection holes is determined according to the reference fry length.

As mentioned above, the distance between the first set of detection holes and the second set of detection holes is at least 1.3-1.7 times of the reference fry length.

As mentioned above, the diameter of the waterway straight pipe is at least 0.2-0.3 times of the reference fry length.

As mentioned above, the fish catching device further comprises a fish catching water tank disposed corresponding to a water outlet of the water path straight pipe, wherein a fine net is disposed in the fish catching water tank to separate a first water layer and a second water layer, and the plurality of fish fries flowing into the fish catching water tank through the water path straight pipe are separated from the first water layer by the fine net.

As described above, the system further comprises a water pumping device, which comprises a water pipe and a pump, wherein one end of the water pipe is connected to the fry water tank to be tested, the other end of the water pipe is connected to the fry water collecting tank, and the pump is connected to the water pipe and is used for pumping the water in the second water layer and transferring the water to the fry water tank to be tested through the water pipe.

As mentioned above, the oxygen supply device further comprises an air outlet connected to an opening of the water pipe for injecting oxygen into the water pipe.

As mentioned above, the fry water tank to be tested includes a fry water tank level sensor connected to the water pumping device, and when the fry water tank level sensor senses that the water level of the fry water tank to be tested is lower than a first water level predetermined value, the water pumping device accelerates the water pumping.

As mentioned above, the fish collecting tank comprises a water level sensor connected to the water pumping device, and the water pumping device stops pumping water when the water level sensor senses that the water level of the fish collecting tank is lower than a second water level predetermined value.

As described above, the central computing device sends an alarm message when determining that the first reflected signal and the second reflected signal are maintained at an initial signal strength for a first threshold time.

As described above, the central computing device records a first arrival time when the first signal is detected, records a first departure time when the first reflected signal returns to an initial signal strength, records a second arrival time when the second signal is detected, and records a second departure time when the second reflected signal returns to the initial signal strength.

As described above, the central computing device records the fry number +1 when determining that the second arrival time is later than the first departure time.

As described above, the central computing device calculates a fry length of the fries according to a first calculation formula, and calculates a passing time of the fries through the first optical detection device according to a second calculation formula;

wherein the first calculation formula is:

l is the length of the fry, T_a1Is the first time of arrival, T_a2Is the first departure time, T_b1D is the distance between the first group of detection holes and the second group of detection holes;

wherein the second calculation formula is: t ═ T_a2-T_a1(ii) a T is the passing time.

As described above, the central computing device calculates the fry length and the passing time of the fries when the second arrival time of the fries is earlier than or equal to the first departure time, calculates a first predicted value according to a third calculation formula, and calculates a second predicted value according to a fourth calculation formula;

wherein, the central computing device records the fry quantity according to Min (M, N).

In order to achieve the above object, the fry counting method of the present invention is mainly applied to the fry counting system, and the fry counting method includes:

As described above, in the step d), the central computing device records a first arrival time when the first signal is detected, records a first departure time when the first reflected signal is restored to an initial signal strength, records a second arrival time when the second signal is detected, and records a second departure time when the second reflected signal is restored to the initial signal strength.

As described above, in the step d), the central computing device records the fry number +1 when the second arrival time is later than the first departure time.

As mentioned above, in the step d), the central computing device further calculates a fry length of the fries according to a first calculation formula, and calculates a passing time of the fries passing through the first optical detection device according to a second calculation formula;

wherein the first calculation formula is:

l is the length of the fry, T_a1Is the first time of arrival, T_a2Is the first departure time, T_b1D is the distance between the first set of inspection holes and the second set of inspection holesSeparating;

wherein the second calculation formula is: t ═ T_a2-T_a1(ii) a T is the passing time.

As described above, in the step d), the central computing device calculates the fry length and the passing time of the fries when the second arrival time of the fries is determined to be earlier than or equal to the first departure time, calculates a first predicted value according to a third calculation formula, and calculates a second predicted value according to a fourth calculation formula;

wherein, the central computing device records the fry quantity according to Min (M, N).

As mentioned above, the distance between the first group of detection holes and the second group of detection holes is at least 1.3-1.7 times of the length of the reference fry, and the diameter of the waterway straight pipe is at least 0.2-0.3 times of the length of the reference fry.

The invention mainly projects light signals by the optical module and receives reflected signals, and then judges and records the passing time point of the fry according to the signal intensity of the reflected signals, thereby accurately recording the number of the fry and further analyzing other information of the fry.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic view of a first embodiment of a fry counting system of the present invention;

FIG. 2 is a schematic diagram of a first embodiment of an optical module of the present invention;

FIG. 3 is a flow chart of a first embodiment of the fry counting method of the present invention;

fig. 4A is a first schematic view of a first embodiment of fry detection of the present invention;

fig. 4B is a second schematic diagram of the first embodiment of fry detection of the present invention;

fig. 4C is a third schematic view of the first embodiment of fry detection of the present invention;

fig. 4D is a fourth schematic diagram of the first embodiment of fry detection of the present invention;

fig. 4E is a fifth schematic view of the first embodiment of fry detection of the present invention;

fig. 5A is a first schematic view of a second embodiment of fry detection of the present invention;

fig. 5B is a second schematic diagram of a second embodiment of fry detection of the present invention;

fig. 5C is a third schematic view of a second embodiment of fry detection of the present invention;

fig. 5D is a fourth schematic diagram of a second embodiment of fry detection of the present invention;

fig. 5E is a fifth schematic view of a second embodiment of fry detection of the present invention;

FIG. 6 is a flowchart of a first embodiment of a detection time recording procedure according to the present invention;

figure 7 is a flow chart of a first embodiment of the fry counting procedure of the present invention,

wherein, the reference numbers:

1 … fry counting system;

11 … fry water tank to be tested;

12 … straight waterway pipes;

1201 … first set of test wells;

1202 … second set of test wells;

121 … water inlet;

122 … water outlet;

13 … an optical module;

131 … first optical module;

1311 … first optical detection means;

1312 … first retroreflective sheeting;

132 … a second optical module;

1321 … a second optical detection device;

1322 … second retro-reflector;

14 … a central computing device;

15 … fish collecting water tank;

151 … fine mesh;

152 … a first aqueous layer;

153 … second aqueous layer;

16 … water pumping equipment;

161 … water pipe;

162 … pump;

17 … an oxygen supply apparatus;

171 … air outlet;

181 … fry water tank level sensor;

182 … water level sensor of fish collecting tank;

2 … fry;

d … pipe diameter;

the distance D …;

S10-S20 … counting step;

S160-S166 … recording steps;

and S180-S198 … counting steps.

Detailed Description

The following detailed description of a preferred embodiment of the invention is provided in conjunction with the accompanying drawings.

Referring to fig. 1, a first embodiment of the fry counting system of the present invention is schematically illustrated. The invention discloses a fry counting system (hereinafter, the counting system 1 is simply referred to as a counting system 1 in the specification), the counting system 1 mainly comprises a fry water tank 11 to be detected, at least one waterway straight pipe 12, a plurality of groups of optical modules 13 and a central computing device 14, wherein the central computing device 14 is connected with the plurality of groups of optical modules 13 in a wired or wireless mode to receive optical signals detected by the optical modules 13.

As shown in fig. 1, the fry tank 11 to be tested is used for holding water and a plurality of fries 2. Specifically, the fry tank 11 to be measured is to place a plurality of fries 2 whose number is to be counted by the counting system 1. At least one output port is arranged at the bottom of the fry water tank 11 to be tested, so that a plurality of fries 2 in the fry water tank 11 to be tested can pass through the output port.

The waterway straight pipe 12 is arranged corresponding to the output port of the fry water tank 11 to be tested, and the fry 2 can flow into the waterway straight pipe 12 from the fry water tank 11 to be tested through the output port. One end of the waterway straight pipe 12 is provided with a water inlet 121, and the other end is provided with a corresponding water outlet 122. The water inlet 121 is connected to an output port of the fry water tank 11 to be measured, so that the fry 2 flows into the straight waterway pipe 12 from the fry water tank 11 to be measured, and finally flows out of the straight waterway pipe 12 from the water outlet 122.

In an embodiment, the output port of the fry water tank 11 to be tested can be set as a funnel-shaped output port, so as to expand the range of water flowing downwards, and further guide the fry 2 in the fry water tank 11 to be tested to flow into the straight water pipe 12 sequentially. When the user starts the water inlet 121 and the water outlet 122 to count, the fry 2 can flow from the fry tank 11 to be measured into the straight waterway pipe 12 by the downward flow force of water.

It should be noted that the number of the straight waterway pipes 12 is three in fig. 1, but the user can increase or decrease the number of the straight waterway pipes 12 according to the number of the fry 2, thereby obtaining the counting speed required by the user. It should be noted that the number of the optical modules 13 in the present invention mainly corresponds to the number of the waterway straight pipes 12. Specifically, a front group of optical modules 13 and a rear group of optical modules 13 are respectively arranged outside each straight waterway pipe 12, that is, the counting system 1 of the present invention respectively detects the fry 2 flowing through each straight waterway pipe 12 by using a pair of optical modules 13.

For convenience of understanding, the following description will take a single straight waterway pipe 12 and two sets of optical modules 13 corresponding to the straight waterway pipe 12 as examples.

Fig. 2 is a schematic view of an optical module according to a first embodiment of the present invention. As shown in fig. 2, the optical module 13 mainly includes an optical detection device and a retro-reflector disposed corresponding to a position of the optical detection device.

In the invention, one waterway straight pipe 12 corresponds to two groups of optical modules 13 at the same time, a distance D is arranged between the two groups of optical modules 13, and the distance D is set corresponding to the reference fry length of the fry 2 in the fry water tank 11 to be detected. In one embodiment, the distance D may be, for example, 1.3 to 1.7 times the length of the reference fry.

For example, if the plurality of fry 2 placed in the fry water tank 11 to be tested is six-minute (about 1.5cm), the distance D may be set to 1.95cm to 2.55cm, if the plurality of fry 2 placed in the fry water tank 11 to be tested is eight-minute (about 2cm), the distance D may be set to 2.6cm to 3.4cm, if the plurality of fry 2 placed in the fry water tank 11 to be tested is two-inch (about 2.5cm), the distance D may be set to 3.25cm to 4.25cm, if the plurality of fry 2 placed in the fry water tank 11 to be tested is two-inch (about 5cm), the distance D may be set to 6.5cm to 8.5cm, and so on.

For convenience of illustration, the two sets of optical modules 13 in fig. 2 are distinguished by a first optical module 131 (closer to the fry water tank 11 to be measured) disposed at the front and a second optical module 132 (farther from the fry water tank 11 to be measured) disposed at the rear, wherein the first optical module 131 includes a first optical detection device 1311 and a first retro-reflector 1312, and the second optical module 132 includes a second optical detection device 1321 and a second retro-reflector 1322.

As shown in fig. 2, the first optical detection device 1311 is disposed outside the straight waterway pipe 12, and continuously projects the first optical signal toward the straight waterway pipe 12. The first retro-reflective plate 1312 is disposed corresponding to the first optical detection device 1311 to reflect the first optical signal as a first reflected signal. In this embodiment, the optical detection devices 1311, 1321 are sensing devices formed by integrally forming a light projector and a light receiver, so the first optical detection device 1311 can receive the first reflection signal reflected by the first retro-reflector 1312.

The second optical detection device 1321 is also disposed outside the straight waterway pipe 12 and spaced apart from the first optical detection device 1311 by the distance D. The second optical detection device 1321 continuously projects the second optical signal toward the waterway straight tube 12. The second retro-reflector 1322 is disposed corresponding to the second optical detection device 1321 to reflect the second optical signal as a second reflected signal. In this embodiment, the counting system 1 also directly receives the second reflection signal reflected by the second retro-reflector 1322 through the second optical detection device 1321.

After the first optical signal and the second optical signal are transmitted, they sequentially pass through the gaseous medium (i.e., air), the solid medium (i.e., straight waterway pipe 12), the liquid medium (i.e., water in straight waterway pipe 12), the solid medium (i.e., the other side of straight waterway pipe 12), and the gaseous medium (i.e., air on the other side) to reach the first retro-reflector 1312 and the second retro-reflector 1322, and the first reflected signal and the second reflected signal also sequentially pass through the gaseous medium, the solid medium, the liquid medium, the solid medium, and the gaseous medium to return to the first optical detection device 1311 and the second optical detection device 1321. As a result, the signal strength of the first reflected signal and the second reflected signal received by the first optical detection device 1311 and the second optical detection device 1321 may be too weak to make the determination inaccurate.

In view of this, the wall of the waterway straight tube 12 may be respectively opened with a first group of detecting holes 1201 and a second group of detecting holes 1202. Specifically, the first group of detection holes 1201 is disposed corresponding to the position of the first optical module 131, and the second group of detection holes 1202 is disposed corresponding to the position of the second optical module 132, in other words, the distance between the first group of detection holes 1201 and the second group of detection holes 1202 is also determined according to the reference fry length of the fry 2 placed in the fry water tank 11 to be measured. In an embodiment, the distance between the first set of detection holes 1201 and the second set of detection holes 1202 may be set to be 1.3 to 1.7 times the reference fry length, for example.

Through the arrangement of the first group of detection holes 1201 and the second group of detection holes 1202, the first optical signal, the second optical signal, the first reflection signal and the second reflection signal are projected and reflected without passing through a solid medium (i.e., the straight water path pipe 12), so that the signal intensities of the first reflection signal and the second reflection signal respectively received by the first optical module 131 and the second optical module 132 can be effectively improved, and the counting accuracy of the counting system 1 is further improved.

It is worth mentioning that, in order to avoid that a large number of fries 2 are overlapped simultaneously through the waterway straight tube 12 to cause the counting difficulty, the pipe diameter d of the waterway straight tube 12 can be mainly set corresponding to the reference fry length of the fries 2. In an embodiment, the diameter d of the waterway straight pipe 12 may be set to be 0.2 to 0.3 times of the reference fry length of the fry 2, but is not limited thereto.

In the present invention, the first optical detection device 1311 continuously projects the first optical signal corresponding to the first group of detection holes 1201 on the straight waterway pipe 12, and receives the first reflection signal reflected by the first retro-reflector 1312. The second optical detection device 1321 continuously projects a second optical signal corresponding to the second set of detection holes 1202 on the straight waterway pipe 12, and receives a second reflection signal reflected by the second retro-reflector 1322. Thereby, the central computing device 14 of the counting system 1 can sense the fry 2 flowing through the waterway straight pipe 12 according to the first reflection signal and the second reflection signal.

The central computing device 14 is mainly connected to the first optical detection device 1311 and the second optical detection device 1321, and continuously receives the first reflected signal and the second reflected signal from the first optical detection device 1311 and the second optical detection device 1321.

In the present invention, the central computing device 14 can calculate the signal intensity of the reflected light signal after passing through the gaseous medium (i.e., air on both sides of the straight waterway pipe 12) and the liquid medium (i.e., water in the straight waterway pipe 12) on both sides in advance, and record the signal intensity as a standard signal intensity. When the central computing device 14 receives the first reflection signal and the second reflection signal and determines that the signal intensity of the first reflection signal and/or the second reflection signal is smaller than a set threshold compared with the standard signal intensity, it is determined that the fry 2 passes through.

It should be noted that, because water flows in the straight waterway pipe 12 and the disturbance of the water greatly affects the transmission of the optical signal, if only a single set of optical modules is arranged outside the straight waterway pipe 12, the central computing device 14 is likely to get temporal noise when tracking the fry 2, and the determination result is unstable. Therefore, the present invention uses at least two sets of optical modules to simultaneously track the fry 2 in a single waterway straight tube 12, thereby greatly improving the accuracy of the judgment result.

Specifically, the central processing unit 14 continuously receives the first and second reflected signals from the first and second optical detection devices 1311 and 1321, detects a first signal, which is attenuated by the fry 2, from the first reflected signal, and detects a second signal, which is attenuated by the fry 2, from the second reflected signal. By the time difference between the detection times of the first signal and the second signal, the central computing device 14 can determine the position of the fry 2 at a specific time point, so that the central computing device 14 can determine whether the fry 2 has passed through the waterway straight tube 12 according to the time difference between the first signal and the second signal, thereby counting the number of the fry (described in detail later).

Please refer to fig. 1 again. The counting system 1 further comprises a fish collecting water tank 15 arranged corresponding to the water outlet 122 of the waterway straight pipe 12. The fry 2 flows into the waterway straight pipe 12 from the fry water tank 11 to be tested, and finally flows into the fish collecting water tank 15 from the water outlet 122 of the waterway straight pipe 12. When a fry 2 flows into the fish collecting tank 15, it indicates that the fry 2 has passed through the first optical module 131 and the second optical module 132 and has been counted by the central counting device 14 (i.e., the number of fries is + 1).

A fine net 151 is further arranged in the fish collecting water tank 15, and a plurality of holes smaller than the volume of the fry 2 are formed in the fine net 151. The fish collecting tank 15 separates the water contained therein into a first water layer 152 and a second water layer 153 by the fine net 151, and the fry 2 flowing into the fish collecting tank 15 through the waterway straight tube 12 is separated from the first water layer 152 by the fine net 151. Because the fry 2 flows into the waterway straight pipe 12 and flows into the fish collecting water tank 15 along with the water in the fry water tank 11 to be measured, along with the operation of the counting system 1, the water in the fry water tank 11 to be measured is less and less, and the water in the fish collecting water tank 15 is more and more.

In order to solve the above problems, the present invention is further provided with a pumping mechanism for pumping the water in the fish collecting water tank 15 back to the fry water tank 11 to be tested, so as to maintain the water amount in the fish collecting water tank 15 and the fry water tank 11 to be tested. The fine net 151 can block the fry 2 that has been counted in the fish collecting water tank 15, and no counting error is caused by the water being pumped back into the fry water tank 11 to be measured.

In particular, the counting system 1 of the present invention further comprises a water pumping device 16, said water pumping device 16 comprising at least a water pipe 161 and a pump 162. One end of the water pipe 161 is connected with the fry water tank 11 to be measured, and the other end is connected with the fish collecting water tank 15. The pump 162 is connected to the water pipe 161. In this embodiment, the other end of the water pipe 161 is mainly disposed on the second water layer 153 of the fish collecting water tank 15, and when the pump 162 is started, water in the second water layer 153 can be pumped from the fish collecting water tank 15 and transferred to the fry water tank 11 to be tested through the water pipe 161. Thus, the water in the fry water tank 11 to be tested is not too small, and the water in the fish collecting water tank 15 is not too much.

The counting system 1 may further include a fry water tank level sensor 181 disposed in the fry water tank 11 to be detected to detect the amount of water in the fry water tank 11 to be detected. The fry tank water level sensor 181 is connected to the water pumping device 16 (mainly connected to the pump 162). When the fry water tank level sensor 181 senses that the water level of the fry water tank 11 to be tested is lower than the first water level predetermined value, a control signal is sent to the water pumping device 16, so that the water pumping device 16 can increase the water pumping speed to maintain the water quantity in the fry water tank 11 to be tested stable.

In another embodiment, the counting system 1 of the present invention may further comprise a fish tank level sensor 182 disposed in the fish tank 15 for detecting the amount of water in the fish tank 15. The fish tank level sensor 182 is connected to the water pumping device 16 (which may be connected to the pump 162). When the fish tank level sensor 182 senses that the water level of the fish tank 15 is lower than the second water level predetermined value, a control signal is sent to the water pumping device 16, whereby the water pumping device 16 stops pumping water to maintain the water amount in the fish tank 15 stable.

In another embodiment, the counting system 1 can also control the operation of the water pumping device 16 according to the counted fry number. Specifically, if the number of fish fries is accumulated fast, it indicates that the fish fries 2 in the fish collection tank 15 are rapidly increased, and therefore the computing system 1 may control the water pumping device 16 to slow down the water pumping speed or decrease the water pumping amount to maintain the water amount in the fish collection tank 15.

If the fry quantity is accumulated slowly, it means that the fry 2 in the fry collecting water tank 15 increases slowly, so the computing system 1 can control the water pumping device 16 to increase the water pumping speed or increase the water pumping amount to maintain the water amount in the fry collecting water tank 11 to be measured.

The counting system 1 may also have an oxygen supply device 17. The oxygen supply device 17 has an air outlet 171, and the oxygen supply device 17 is connected to an opening (not shown) on the water pipe 161 through the air outlet 171 to inject oxygen into the water pipe 161. Therefore, the water pumped back to the fry water tank 11 by the water pumping device 16 can be ensured to have enough oxygen content.

By the above-mentioned pumping equipment 16 and oxygen supply device 17, the automatic circulation of water in the operation process of the counting system 1 can be ensured, and the automatic counting function can be achieved without human intervention.

Please refer to fig. 3, which is a flowchart illustrating a fry counting method according to a first embodiment of the present invention. The present invention further discloses a fry counting method (hereinafter, referred to as counting method), which is mainly applied to the counting system 1 shown in fig. 1.

Specifically, when the counting system 1 of the present invention is used, a plurality of fish fries 2 to be counted are first placed in the fry water tank 11 to be measured, and the first optical module 131 and the second optical module 132 project the first optical signal and the second optical signal toward the waterway straight tube 12, respectively.

Specifically, the counting system 1 projects a first optical signal from the first optical detection device 1311 corresponding to the first set of detection holes 1201 on the pipe wall of the straight waterway pipe 12, and receives a first reflection signal reflected by the first retro-reflector 1312 (step S10). The computing system 1 further projects a second optical signal from the second optical detection device 1321 corresponding to the second set of detection holes 1202 on the wall of the straight waterway pipe 12, and receives a second reflection signal reflected by the second retro-reflector 1322 (step S12). The steps S10 and S12 may be executed sequentially or simultaneously, and do not have a necessary order relationship.

After the first optical detection device 1311 and the second optical detection device 1321 receive the first reflection signal and the second reflection signal, respectively, the central computing device 14 can receive the first reflection signal and the second reflection signal from the first optical detection device 1311 and the second optical detection device 1321, respectively (step S14).

Next, the central computing device 14 detects the signal intensities of the first reflected signal and the second reflected signal to obtain a first signal in which the first reflected signal is shielded by the fry 2 and the signal intensity is attenuated, and a second signal in which the second reflected signal is shielded by the fry 2 and the signal intensity is attenuated (step S16). If the central computing device 14 successfully detects the first signal and the second signal, it can determine that the fry 2 has passed through the waterway straight tube 12 according to the time difference between the first signal and the second signal, and count the number of the fries (step S18).

Specifically, when the fry 2 flows in front of the first optical detection device 1311, the first optical signal is shielded by the fry 2 to obtain a first reflected signal with attenuated signal intensity, that is, the first signal. When the fry 2 then flows in front of the second optical detection device 1321, the second optical signal is shielded by the fry 2 to obtain a second reflected signal with attenuated signal intensity, i.e. the second signal. When the first signal and the second signal are detected in sequence, the central computing device 14 can judge that the fry 2 has passed through the waterway straight pipe 12, and then record the number of the fries.

When the counting system 1 of the present invention is in operation, it is continuously determined whether the counting operation needs to be stopped (step S20), for example, whether the power is turned off, the output port of the fry water tank 11 to be tested is turned off, and whether the fry 2 is not detected for a long time. If it is determined that the counting operation does not need to be stopped, the counting system 1 returns to step S10, the optical modules 13 continuously project and receive the optical signals, and the central computing device 14 continuously detects the signal intensity of the optical signals to count the number of fish fries. If it is determined that the counting operation needs to be stopped, the counting system 1 ends the counting method of the present invention.

Fig. 4A to 4E are schematic diagrams of a fry detection method according to a first embodiment of the invention. Fig. 6 is a flowchart illustrating a detection time recording procedure according to a first embodiment of the present invention. Fig. 6 mainly explains step S16 of fig. 3 further, and is described with reference to fig. 4A to 4E for an exploded operation.

First, as shown in fig. 4A, after the counting system 1 of the present invention is started, the first optical detection device 1311 continuously projects a first optical signal and receives a first reflection signal corresponding to the first set of detection holes 1201 on the straight waterway pipe 12, and the second optical detection device 1321 continuously projects a second optical signal and receives a second reflection signal corresponding to the second set of detection holes 1202 on the straight waterway pipe 12. At this time, the first optical signal, the first reflected signal, the second optical signal and the second reflected signal only pass through the gaseous medium (air) and the liquid medium (water).

Then, as shown in fig. 4B, when the fry 2 flows to the position of the first optical detection device 1311 through the straight waterway pipe 12, the first optical signal and the first reflected signal are shielded, so that the signal intensity of the first reflected signal is attenuated to form the first signal. At this time, the first optical signal and the first reflection signal simultaneously pass through the gaseous medium (air), the liquid medium (water) and the solid medium (the penetration degree varies according to the type of the light source and whether the fry 2 is translucent or not). In this embodiment, the central computing device 14 records the first arrival time of the fry 2 (i.e. the time when the fry 2 arrives at the position of the first optical detection device 1311) when detecting the first signal (step S160).

Then, as shown in fig. 4C, when the fry 2 leaves the position of the first optical detection device 1311, the signal intensity of the first reflected signal is restored to the original signal intensity (i.e., the signal intensity when not obscured by the fry 2). The first optical signal and the first reflected signal only pass through the gaseous medium (air) and the liquid medium (water). In this embodiment, the central computing device 14 records the first departure time of the fry 2 (i.e. the time when the fry 2 departs from the position of the first optical detection device 1311) when detecting that the first reflected signal returns to the original signal strength (step S162).

As shown in fig. 4D, when the fry 2 flows to the position of the second optical detection device 1321, the second optical signal and the second reflected signal are shielded, so that the signal intensity of the second reflected signal is attenuated to form the second signal. At this time, the second optical signal and the second reflected signal will simultaneously pass through the gaseous medium (air), the liquid medium (water) and the solid medium (the degree of penetration varies depending on the type of the light source and whether the fry 2 is translucent or not). In this embodiment, the central computing device 14 records the second arrival time of the fry 2 (i.e. the time when the fry 2 arrives at the position of the second optical detection device 1321) when detecting the second signal (step S164).

Then, as shown in fig. 4E, when the fry 2 leaves the position of the second optical detection device 1321, the signal intensity of the second reflected signal is restored to the original signal intensity. The second optical signal and the second reflected signal only pass through the gaseous medium (air) and the liquid medium (water). In this embodiment, the central computing device 14 records the second departure time of the fry 2 (i.e. the time when the fry 2 departs from the position of the second optical detection device 1321) when detecting that the second reflected signal returns to the original signal strength (step S166).

As described hereinbefore, the distance between the first optical detection device 1311 and the second optical detection device 1321 (i.e., the distance between the first group of detection holes 1201 and the second group of detection holes 1202) is set in accordance with the reference fry length of the fry 2 to be counted, and is slightly larger than the reference fry length (e.g., 1.3 to 1.7 times). In the embodiment of fig. 4A to 4E, the second arrival time of the fry 2 is later than the first departure time, which means that the length of the fry 2 is less than the distance between the first optical detection device 1311 and the second optical detection device 1321, and there is no phenomenon that a plurality of fries 2 overlap. Therefore, the central computing device 14 counts the number of fries to be 1 when determining that the second arrival time of the fries 2 is later than the first departure time (i.e. the time difference indicated by step S18 of fig. 3).

As described above, the central computing device 14 mainly uses the time difference between the first signal and the second signal to count the number of fish fries, that is, if the central computing device 14 cannot detect the first signal and the second signal, the number of fish fries cannot be counted. In one embodiment, the central computing device 14 sends the warning message when determining that the first reflected signal and the second reflected signal are maintained at the initial signal strength for a first threshold time.

Specifically, if the first and second reflected signals do not generate the phenomenon that the signal intensity is attenuated to form the first and second signals, it indicates that no fry 2 passes through. If the fry 2 does not pass for the first threshold time (e.g. 5 seconds, 10 seconds, etc.), the central computing device 14 can determine that there is no remaining fry 2 in the fry tank 11 to be tested, or determine that the straight waterway pipe 12 is blocked by a foreign object or a fry 2 with an excessively large volume. At this time, the central computing device 14 may send an alarm signal to notify the user to turn off the counting system 1 or to perform condition elimination.

It should be noted that, by using the time difference, the central computing device 14 can further analyze and calculate other information of each fry 2, such as length, passing time, etc.

In one embodiment, the central computing device 14 can calculate the fry length of a tail fry 2 according to the following first calculation formula.

The first calculation formula:

wherein L is the fry length of one fry 2, T_a1Is the first time of arrival, T_a2Is the first departure time, T_b1For the second time of arrival, D is the distance between the first set of detection holes 1201 and the second set of detection holes 1202.

In this embodiment, the central computing device 14 may determine whether the fry 2 has the problem of being too large or too small after calculating the fry length L. For example, if the fry length is greater than 1.2 times the reference fry length, the central computing device 14 determines that the fry 2 is oversized, and accumulates the fries that are +1 oversized; if the fry length is less than 0.8 times of the reference fry length, the central computing device 14 judges that the size of the fry 2 is too small, and accumulates the fry to be too small by + 1.

In this way, after all the fries 2 in the fry water tank 11 to be tested are counted, the central computing device 14 can determine whether the accumulated number of the too large fries or the too small fries exceeds a threshold (e.g., 10 fries or 20 fries), and send out a warning signal when the accumulated number exceeds the threshold to remind the user to perform grouping. Therefore, the phenomenon of food residue caused by different sizes of the plurality of fish fries 2 can be effectively avoided.

In an embodiment, the central computing device 14 may further calculate the passing time of the tail fry 2 according to the following second calculation formula. The passage time may refer to a time when the fry 2 passes through the position of the first optical detection device 1311 or a time when the fry 2 passes through the position of the second optical detection device 1321, which is not limited. The second calculation formula below is an example of the time when the position of the first optical detection device 1311 passes through, but is not limited to this.

The second calculation formula: t ═ T_a2-T_a1. Wherein T is the transit time.

It is worth mentioning that the central computing device 14 can completely record the passing time of each fry 2 through each optical detection device 1311, 1321, and calculate the average passing time (T) of all the fries 2 according to the passing times_avg). For example, after fifty times of passage are recorded by each of the optical detection devices 1311, 1321, the central computing device 14 may sum all the passage times of all the optical detection devices 1311, 1321 and divide the sum by the accumulated count, thereby obtaining an average passage time of a tail fry 2 as a reference value for other subsequent calculations (described in detail later).

Please refer to fig. 5A to 5E, which are first to fifth schematic diagrams of a fry detection method according to a second embodiment of the present invention. Fig. 5A to 5E are views for explaining the processing procedure when a plurality of fries 2 are overlapped.

First, as shown in fig. 5A, the first optical detection device 1311 continuously projects a first optical signal and receives a first reflection signal toward the straight waterway pipe 12, and the second optical detection device 1321 continuously projects a second optical signal and receives a second reflection signal toward the straight waterway pipe 12. When the fry 2 does not flow through, the first optical signal, the first reflected signal, the second optical signal and the second reflected signal pass through the gaseous medium (air) and the liquid medium (water).

Then, as shown in fig. 5B, when the fry 2 flows to the position of the first optical detection device 1311 through the straight waterway pipe 12, the first optical signal and the first reflected signal are shielded, and the signal intensity of the first reflected signal is attenuated to form the first signal. At this time, the first optical signal and the first reflection signal simultaneously pass through the gaseous medium (air), the liquid medium (water) and the solid medium (the penetration degree varies according to the type of the light source and whether the fry 2 is translucent or not). As in fig. 4B, central computing device 14 records a first arrival time of fry 2 when the first signal is detected.

Then, as shown in fig. 5C, before the signal intensity of the first reflected signal is not recovered to the original signal intensity (i.e., the first signal is still present), the fry 2 reaches the position of the second optical detection device 1321 and shields the second optical signal and the second reflected signal, so that the signal intensity of the second reflected signal is attenuated to form the second signal. The first optical signal, the second optical signal, the first reflected signal and the second reflected signal all simultaneously pass through the gaseous medium (air), the liquid medium (water) and the solid medium (fry 2), that is, the central computing device 14 can simultaneously detect the first signal and the second signal.

In fig. 5C, the length of the fry 2 is too long (larger than the distance between the first optical detection device 1311 and the second optical detection device 1321), or a plurality of fries 2 are overlapped and continuously passed through. Therefore, the central computing device 14 needs to perform further calculations and determinations.

Then, as shown in fig. 5D, when the fry 2 continuously flows and leaves the position of the first optical detection device 1311, the signal intensity of the first reflected signal is restored to the original signal intensity. The first optical signal and the first reflected signal only pass through the gaseous medium (air) and the liquid medium (water). As in fig. 4C, the central computing device 14 will record the first departure time of the fry 2 upon detecting that the first reflected signal returns to the original signal strength.

Then, as shown in fig. 5E, when the fry 2 continuously flows and leaves the position of the second optical detection device 1321, the signal intensity of the second reflected signal is restored to the original signal intensity. The second optical signal and the second reflected signal only pass through the gaseous medium (air) and the liquid medium (water). As in fig. 4E, the central computing device 14 will record the second departure time of the fry 2 upon detecting that the second reflected signal returns to the original signal strength.

In the present invention, when the phenomenon shown in fig. 5C occurs, the central computing device 14 determines whether the fry is too long or the fry is overlapped according to the time difference, the reference fry length, the average passing time, and other parameters, and then determines how to count the number of the fries.

Fig. 7 is a flowchart of a fry counting procedure according to a first embodiment of the invention. Fig. 7 is a further explanation of step S18 in fig. 3, which is used to illustrate how the central computing device 14 determines that the fry is too long or overlapped.

First, the central computing device 14 determines whether the phenomenon shown in fig. 5C occurs during counting, i.e., the central computing device 14 determines whether the second arrival time of the fry 2 is earlier than or equal to the first departure time (step S180). If the second arrival time of the fry 2 is later than the first departure time, it indicates that the length of the fry 2 is shorter than the distance between the first optical detection device 1311 and the second optical detection device 1321, and therefore the central computing device 14 counts the number of fries to 1 (step S182), indicating that there is no overlapping of fries.

Next, the central computing unit 14 calculates the fry length and the passage time of the fry 2 by the first and second calculation formulas (step S184), and determines whether the fry 2 is over-sized or under-sized (step S186). Specifically, if the fry length is greater than 1.2 times the reference fry length (L > 1.2 XL)_ref) If yes, the central computing device 14 accumulates the fry to be over-large +1 (step S188); if the length of the fry is less than 0.8 times of the reference fry length (L is less than 0.8 multiplied by L)_ref) Then, the central computing device 14 accumulates the fry as too small +1 (step S190). The aforementioned Lref is a reference fry length.

If the central computing device 14 determines that the second arrival time of the fry 2 is actually earlier than or equal to the first departure time in the step S180, it indicates that there may be fry overlapping. At this time, the central computing device 14 first calculates the fry length and the passage time of the fry 2 by the above calculation formula (step S192). Next, the central computing unit 14 calculates the first predicted value by the following third calculation formula (step S194).

The third calculation formula: (M-0.5). times.L_ref＜L≤(M+0.5)×L_ref. Wherein M is a first predicted value, L_refFor reference fry length, L is fry length of fry 2, and the first predicted value is a positive integer.

The central processing unit 14 also calculates a second predicted value by the following fourth calculation formula (step S196).

The fourth calculation formula: (N-0.5). times.T_avg＜T≤(N+0.5)×T_avg. Wherein N is the second predicted value, T_avgFor the average passage time, T is a passage time of fry 2 (a time of passing through the first optical detection device 1311 or a time of passing through the second optical detection device 1321), and the second predicted value is a positive integer.

Finally, the central computing apparatus 14 counts the number of fries by the minimum value (i.e., Min (M, N)) of the first predicted value M and the second predicted value N (step S198).

Specifically, if the length of one fry 2 exceeds the reference fry length, but the passing time does not greatly exceed the average passing time, it means that the fry 2 may be only large in size, but there is no problem of overlapping multiple fries. Similarly, if the passing time of one fry 2 exceeds the average passing time, but the length does not greatly exceed the reference fry length, it means that the fry 2 may only flow slowly, but there is no problem of overlapping multiple fries.

It should be noted that, since the fry 2 is fragile and may die during the counting process or the transportation process after the counting is completed, the present invention selects the minimum value of the first predicted value M and the second predicted value N to count the number of the fries in the step S198, thereby effectively reducing the error and improving the counting accuracy. In addition, the present invention counts the number of fries mainly through the signal intensity of the optical signal, so that the counting error may be caused by the impurities (such as leaves) flowing in the straight waterway pipe 12. In this case, the above-mentioned method of counting the number of fish fries with the minimum value can also make the number of fish fries counted closer to the actual number of fish fries.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

27页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：一种鱼苗过筛装置

Fry counting system and fry counting method

相关技术

网友询问留言