阅读说明：本技术 激光器液面测量装置及控制方法 (Laser liquid level measuring device and control method ) 是由 焦英豪 杨雷 陆凯凯 毛卫涛 牛飞飞 于 2020-12-29 设计创作，主要内容包括：本发明属于激光器技术领域,公开了一种激光器液面测量装置及控制方法。所述激光器液面测量装置包括：测量井设置在待测量液体中,测量井的井壁设置有孔洞,以使测量井内的待测量液体与测量井外的待测量液体相互连通,浮子漂浮在测量井内的液面上,浮子设置有反射面,激光器设置在测量井的上方,处理器设置在激光器中；激光器向浮子的反射面发射激光信号,以使浮子通过反射面对激光信号进行反射；处理器接收反射后的激光信号,根据反射后的激光信号获取浮子与激光器的当前距离,并根据第一预设高度与第一预设时间内的当前距离获取液面当前高度。本发明通过设置浮子满足激光信号的反射需求,通过设置测量井防止浮子位移,提升了液面测量精度。(The invention belongs to the technical field of lasers, and discloses a laser liquid level measuring device and a control method. The laser liquid level measuring device includes: the measuring well is arranged in liquid to be measured, a hole is formed in the wall of the measuring well, so that the liquid to be measured in the measuring well is communicated with the liquid to be measured outside the measuring well, the floater floats on the liquid level in the measuring well, the floater is provided with a reflecting surface, the laser is arranged above the measuring well, and the processor is arranged in the laser; the laser emits a laser signal to the reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface; the processor receives the reflected laser signal, acquires the current distance between the floater and the laser according to the reflected laser signal, and acquires the current height of the liquid level according to the first preset height and the current distance within the first preset time. The invention meets the reflection requirement of laser signals by arranging the floater, prevents the floater from displacing by arranging the measuring well and improves the liquid level measuring precision.)

1. A laser level measurement device, comprising: the device comprises a laser, a processor, a measuring well and a floater; the measuring well is arranged in liquid to be measured, a hole is formed in the wall of the measuring well, so that the liquid to be measured in the measuring well and the liquid to be measured outside the measuring well are communicated with each other, the floater floats on the liquid level in the measuring well, the floater is provided with a reflecting surface, the laser is arranged above the measuring well, and the processor is arranged in the laser;

the laser is used for transmitting a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface;

the processor is used for receiving the reflected laser signal, acquiring the current distance between the floater and the laser according to the reflected laser signal, and acquiring the current height of the liquid level according to the first preset height and the current distance within the first preset time;

wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

2. The laser liquid level measuring device of claim 1, further comprising a first level, a first wireless communication module, a second wireless communication module, and a camera; the camera is arranged on the laser, the camera is arranged towards the floater, the first level gauge and the first wireless communication module are arranged inside the floater, and the second wireless communication module is arranged in the laser;

the first gradienter is used for detecting the floater inclination angle information of the floater and sending the floater inclination angle information to the second wireless communication module through the first wireless communication module;

the camera is used for acquiring a current image of the reflecting surface of the floater and outputting the current image to the processor;

the processor is used for receiving the floater inclination angle information transmitted by the second wireless communication module and generating distance compensation information according to the floater inclination angle information and the current image;

and the processor is further used for correcting the current height of the liquid level according to the distance compensation information so as to obtain the corrected current height of the liquid level.

3. The laser liquid level measuring device according to claim 2, wherein a second level gauge is further arranged in the laser, and the second level gauge is used for acquiring laser inclination angle information of the laser and sending the laser inclination angle information to the processor;

and the processor is used for correcting the current height of the liquid level according to the inclination angle information of the laser and the distance compensation information so as to obtain the corrected current height of the liquid level.

4. The laser liquid level measuring device according to any one of claims 1 to 3, wherein the float is provided in a sheet shape with a central protrusion, and both surfaces of the float are provided with reflecting surfaces for reflecting the laser signal.

5. The laser liquid level measuring device according to claim 4, wherein a balance weight is arranged in the inner cavity of the float, two ends of the balance weight are respectively connected with the bottom surface and the top surface of the inner cavity of the float, and the balance weight is positioned at the center of the inner cavity of the float.

6. The laser level measurement device of claim 5, wherein the diameter of the cross section of the inner wall of the measurement well differs from the outer diameter of the float by a first preset length; the cross section of the floater is the same as that of the inner wall of the measuring well.

7. The laser liquid level measuring device according to claim 6, wherein the bottom of the measuring well is close to the bottom of the liquid to be measured, and a filter screen is arranged at the bottom of the measuring well;

the measuring well comprises an inner wall and an outer wall, a cavity is formed between the inner wall and the outer wall of the measuring well, the outer wall is a filter screen provided with holes with the diameter of a first diameter, and the inner wall is a filter screen provided with holes with the diameter of a second diameter;

the first diameter is smaller than the second diameter.

8. A control method of a laser liquid level measuring device, wherein the control method is based on the laser liquid level measuring device according to any one of claims 1 to 7, and the control method comprises:

the laser emits a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface;

the processor receives the reflected laser signal, acquires the current distance between the floater and the laser according to the reflected laser signal, and acquires the current height of the liquid level according to a first preset height and the current distance within a first preset time;

wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

9. The control method of the laser liquid level measuring device according to claim 8, wherein the device further comprises a first level gauge, a first wireless communication module, a second wireless communication module and a camera; the camera is arranged on the laser, the camera is arranged towards the floater, the first level gauge and the first wireless communication module are arranged inside the floater, and the second wireless communication module is arranged in the laser;

the step of receiving the reflected laser signal, obtaining the current distance between the floater and the laser according to the reflected laser signal, and obtaining the current height of the liquid level according to the first preset height and the current distance within the first preset time, and then further comprises:

the first gradienter detects the floater inclination angle information of the floater and sends the floater inclination angle information to the second wireless communication module through the first wireless communication module;

the camera acquires a current image of the reflecting surface of the floater and outputs the current image to the processor;

the processor receives floater inclination angle information transmitted by a second wireless communication module and generates distance compensation information according to the floater inclination angle information and the current image;

and the processor corrects the current height of the liquid level according to the distance compensation information so as to obtain the corrected current height of the liquid level.

10. The method for controlling a liquid level measuring device of a laser according to claim 9, wherein a second level gauge is further provided in the laser;

the processor corrects the current height of the liquid level according to the distance compensation information to obtain the corrected current height of the liquid level, and the method specifically comprises the following steps:

the second gradienter acquires the laser inclination angle information of the laser and sends the laser inclination angle information to the processor;

and the processor corrects the current height of the liquid level according to the inclination angle information of the laser and the distance compensation information so as to obtain the corrected current height of the liquid level.

Technical Field

The invention relates to the technical field of lasers, in particular to a laser liquid level measuring device and a control method.

Background

In the prior art, when the liquid level of liquid is measured by a laser, the laser needs a certain reflection condition for measuring the liquid level, an accurate liquid level measurement result is difficult to obtain under the condition of large liquid level fluctuation range, and if the accurate liquid level measurement result is obtained, the liquid level needs to be waited for standing for a period of time; but in some special scenarios: such as oil in transit, a fluctuating river, etc., the liquid level is difficult to stand still, and it is difficult to obtain an accurate liquid level measurement result by continuous fluctuation.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a laser liquid level measuring device and a control method, and aims to solve the technical problem that the laser in the prior art is low in measuring accuracy when the special liquid level fluctuates.

In order to achieve the above object, the present invention provides a laser liquid level measuring device, comprising: the device comprises a laser, a processor, a measuring well and a floater; the measuring well is arranged in liquid to be measured, a hole is formed in the wall of the measuring well, so that the liquid to be measured in the measuring well and the liquid to be measured outside the measuring well are communicated with each other, the floater floats on the liquid level in the measuring well, the floater is provided with a reflecting surface, the laser is arranged above the measuring well, and the processor is arranged in the laser;

the laser is used for transmitting a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface;

the processor is used for receiving the reflected laser signal, acquiring the current distance between the floater and the laser according to the reflected laser signal, and acquiring the current height of the liquid level according to the first preset height and the current distance within the first preset time;

wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

Optionally, the device further comprises a first level meter, a first wireless communication module, a second wireless communication module and a camera; the camera is arranged on the laser, the camera is arranged towards the floater, the first level gauge and the first wireless communication module are arranged inside the floater, and the second wireless communication module is arranged in the laser;

the first gradienter is used for detecting the floater inclination angle information of the floater and sending the floater inclination angle information to the second wireless communication module through the first wireless communication module;

the camera is used for acquiring a current image of the reflecting surface of the floater and outputting the current image to the processor;

the processor is used for receiving the floater inclination angle information transmitted by the second wireless communication module and generating distance compensation information according to the floater inclination angle information and the current image;

and the processor is further used for correcting the current height of the liquid level according to the distance compensation information so as to obtain the corrected current height of the liquid level.

Optionally, a second level meter is further arranged in the laser, and the second level meter is configured to acquire laser tilt angle information of the laser and send the laser tilt angle information to the processor;

and the processor is used for correcting the current height of the liquid level according to the inclination angle information of the laser and the distance compensation information so as to obtain the corrected current height of the liquid level.

Optionally, the float is provided with a sheet with a convex center, and two surfaces of the float are provided with reflecting surfaces for reflecting the laser signal.

Optionally, a balance weight is arranged in the inner cavity of the float, two ends of the balance weight are respectively connected with the bottom surface and the top surface of the inner cavity of the float, and the balance weight is located in the center of the inner cavity of the float.

Optionally, the diameter of the cross-section of the inner wall of the measurement well differs from the outer diameter of the float by a first preset length; the cross section of the floater is the same as that of the inner wall of the measuring well.

Optionally, the bottom of the measuring well is close to the bottom of the liquid to be measured, and a filter screen is arranged at the bottom of the measuring well;

the measuring well comprises an inner wall and an outer wall, a cavity is formed between the inner wall and the outer wall of the measuring well, the outer wall is a filter screen provided with holes with the diameter of a first diameter, and the inner wall is a filter screen provided with holes with the diameter of a second diameter;

the first diameter is smaller than the second diameter.

In addition, in order to achieve the above object, the present invention further provides a control method of a laser liquid level measuring device, the control method being based on the laser liquid level measuring device as described above, the control method comprising:

the laser emits a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface;

the processor receives the reflected laser signal, acquires the current distance between the floater and the laser according to the reflected laser signal, and acquires the current height of the liquid level according to a first preset height and the current distance within a first preset time;

wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

Optionally, the device further comprises a first level meter, a first wireless communication module, a second wireless communication module and a camera; the camera is arranged on the laser, the camera is arranged towards the floater, the first level gauge and the first wireless communication module are arranged inside the floater, and the second wireless communication module is arranged in the laser;

the step of receiving the reflected laser signal, obtaining the current distance between the floater and the laser according to the reflected laser signal, and obtaining the current height of the liquid level according to the first preset height and the current distance within the first preset time, and then further comprises:

the first gradienter detects the floater inclination angle information of the floater and sends the floater inclination angle information to the second wireless communication module through the first wireless communication module;

the camera acquires a current image of the reflecting surface of the floater and outputs the current image to the processor;

the processor receives floater inclination angle information transmitted by a second wireless communication module and generates distance compensation information according to the floater inclination angle information and the current image;

and the processor corrects the current height of the liquid level according to the distance compensation information so as to obtain the corrected current height of the liquid level.

Optionally, a second level is further disposed in the laser;

the processor corrects the current height of the liquid level according to the distance compensation information to obtain the corrected current height of the liquid level, and the method specifically comprises the following steps:

the second gradienter acquires the laser inclination angle information of the laser and sends the laser inclination angle information to the processor;

and the processor corrects the current height of the liquid level according to the inclination angle information of the laser and the distance compensation information so as to obtain the corrected current height of the liquid level.

The invention provides a laser liquid level measuring device, which comprises: the device comprises a laser, a processor, a measuring well and a floater; the measuring well is arranged in liquid to be measured, a hole is formed in the wall of the measuring well, so that the liquid to be measured in the measuring well and the liquid to be measured outside the measuring well are communicated with each other, the floater floats on the liquid level in the measuring well, the floater is provided with a reflecting surface, the laser is arranged above the measuring well, and the processor is arranged in the laser; the laser is used for transmitting a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface; the processor is used for receiving the reflected laser signal, acquiring the current distance between the floater and the laser according to the reflected laser signal, and acquiring the current height of the liquid level according to the first preset height and the current distance within the first preset time; wherein the first preset height is the height of the laser from the bottom of the liquid to be measured. Through setting up float reflection laser signal, satisfy laser signal's reflection demand, prevent the float displacement through setting up the survey well, obtain the current distance in the time of predetermineeing and prevent that the liquid level fluctuation from influencing measurement accuracy, the device is simply applicable to a plurality of measurands liquid.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a first embodiment of a laser liquid level measuring device according to the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the liquid level measuring device of the laser of the present invention;

FIG. 3 is a schematic view of a float of an embodiment of the laser level measurement apparatus of the present invention;

FIG. 4 is a schematic view of a measuring well of an embodiment of the laser liquid level measuring device of the present invention;

fig. 5 is a schematic flow chart of a control method of a laser liquid level measuring device according to a first embodiment of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.

The embodiment of the invention provides a liquid level measuring device for a laser, and fig. 1 is a schematic structural diagram of the liquid level measuring device for the laser in the first embodiment of the invention.

The laser liquid level measuring device includes: the device comprises a laser 1, a processor 11, a measuring well 2 and a floater 3; the measuring well 2 is arranged in liquid to be measured, a hole is formed in the wall of the measuring well 2, so that the liquid to be measured in the measuring well 2 is communicated with the liquid to be measured outside the measuring well 2, the floater 3 floats on the liquid level in the measuring well 2, the floater 3 is provided with a reflecting surface, the laser 1 is arranged above the measuring well 2, and the processor 11 is arranged in the laser 1.

It should be noted that the outer surface of the float 3 is made of smooth material, so that the liquid to be measured is not easy to adhere to the outer surface, and the change of the measurement result caused by the change of the distance between the surface of the float and the laser 1 due to the adhesion of the liquid to be measured is prevented. The float 3 is provided with a hollow inner chamber and can stably float on the liquid surface. The wall of the measuring well 2 is provided with a hole, so that liquid to be measured can enter the measuring well, and the liquid in the measuring well is communicated with external liquid; meanwhile, the measuring well can limit the displacement of the floater on the liquid level, and the light emitted by the laser device is prevented from directly irradiating the fluctuating liquid level due to the position deviation of the floater.

The laser 1 is configured to emit a laser signal to a reflection surface of the float 3, so that the float 3 reflects the laser signal through the reflection surface.

Since the laser light emitted from the laser 1 is directly irradiated on the float 3 rather than on the liquid surface, the temperature rise of the liquid surface caused by the laser light being directly irradiated on the liquid surface is not considered. If the liquid level fluctuates, the floater 3 fluctuates along with the liquid level, and the floater 3 is a solid object, so that the movement of the floater is more stable compared with the fluctuation of the liquid level. The reflection requirements of the laser 1 are met by the provision of the float 3.

The processor 11 is configured to receive the reflected laser signal, obtain a current distance between the float 3 and the laser 1 according to the reflected laser signal, and obtain a current height of the liquid level according to a first preset height and the current distance within a first preset time.

Wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

It will be readily appreciated that there may be an error in the current distance at a time directly as the actual distance from the liquid level to the laser, since the float 3 will fluctuate with the liquid level. Therefore, a plurality of current distances within a first preset time are acquired, and an average value of the current distances within the first preset time is acquired as the distance from the laser 1 to the surface of the float 3.

It should be understood that there is a second preset height in addition to the first preset height; the second preset height is a distance from a position, at which the reflecting surface of the float 3 receives the laser signal, to the liquid level, and in specific implementation, the second preset height may be half of the thickness of the float according to the structure of the float 3. Referring to fig. 1, the processor 11 may be a single chip microcomputer storing a program for data processing. The processor 11 subtracts the second preset height L2 and the current distance L0 from the first preset height L1 to obtain the current height of the liquid level.

In this embodiment, through setting up float reflection laser signal, satisfy laser signal's reflection demand, prevent the float displacement through setting up the survey well, acquire the current distance in the time of predetermineeing and prevent that the liquid level fluctuation from influencing measurement accuracy, the device is simply applicable to multiple volume of awaiting measuring liquid.

Based on the first embodiment, the present invention further provides a second embodiment of the laser liquid level measuring device, referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic structural diagram of the second embodiment of the laser liquid level measuring device of the present invention; FIG. 3 is a schematic view of a float of an embodiment of the laser level measurement apparatus of the present invention; FIG. 4 is a schematic view of a measurement well of an embodiment of the laser liquid level measurement apparatus of the present invention.

Referring to fig. 2, the liquid level measuring device of the laser in this embodiment further includes a first level gauge 32, a first wireless communication module 33, a second wireless communication module 12, and a camera 13; the camera 13 is arranged on the laser 1, the camera 13 is arranged towards the floater 3, the first level gauge 14 and the first wireless communication module 33 are arranged inside the floater 3, and the second wireless communication module 12 is arranged in the laser 1.

It should be noted that the wireless communication module may be a bluetooth communication module, a Zigbee communication module, a wireless antenna, or the like.

The first level gauge 32 is configured to detect float inclination information of the float 3, and send the float inclination information to the second wireless communication module 12 through the first wireless communication module 33.

It should be noted that the first level 32 is used to measure the inclination of the cross-sectional plane of the float 3 with respect to the horizontal position, and the float inclination information is the inclination.

The camera 13 is configured to acquire a current image of the reflecting surface of the float 3, and output the current image to the processor 11.

It should be noted that the output ends of the second level meter 14, the camera 13, and the second wireless communication module 12 are all connected to the signal input end of the processor 11; the output of the first level gauge 32 is connected to the receiving end of the first wireless communication module 33. The processor 11 may be a single chip microcomputer, and stores a program for data processing.

The processor 11 is configured to receive the floater inclination information transmitted by the second wireless communication module 12, and generate distance compensation information according to the floater inclination information and the current image.

In an ideal state, the laser emitted by the laser 1 is irradiated at the center of the float 3, and the second preset height, which is half the thickness of the float, is calculated from the center position of the float. The floater is arranged to be a sheet with a convex surface in the middle, so that liquid volume is prevented from accumulating on the floater to influence the measurement result and the reflection effect. In order to prevent the floater from being clamped on the inner wall of the measuring well 2, a gap with a first preset length is formed between the inner wall of the measuring well 2 and the floater, so that the floater 3 can reflect the height of the liquid level. If the float floats along the liquid level, the float can incline, and meanwhile, the float can slightly displace on the inner wall of the measuring well, so that the laser irradiation position deviates from the positive center of the surface of the float, and the distance from the liquid level, which corresponds to the non-positive center of the surface of the float, is less than a second preset height.

It is easy to understand that the actual position of the laser irradiated on the float 3 can be obtained according to the current image, and the distance from the actual position to the cross section of the center of the float can be obtained according to the position difference between the actual position and the position of the center of the surface of the float, the information of the inclination angle of the float and the second preset height, and the distance is taken as the actual second preset height L2'.

The processor 11 is further configured to correct the current height of the liquid level according to the distance compensation information, so as to obtain a corrected current height of the liquid level.

It should be understood that the corrected current liquid level height is the first preset height L1 minus the actual second preset height L2' and the current distance L0.

A second level meter 14 is further arranged in the laser, and the second level meter 14 is used for acquiring laser inclination angle information of the laser 1 and sending the laser inclination angle information to the processor; and the processor 11 is configured to correct the current height of the liquid level according to the laser tilt angle information and the distance compensation information, so as to obtain a corrected current height of the liquid level.

It should be noted that the laser tilt angle information is the tilt between the plane and the horizontal position of the laser emitted by the laser; because the measurement environment cannot be kept ideal continuously, for example: the device is used for measuring the water level of the reservoir, and the reservoir is in an open-air environment, so that weather change and wind blowing cannot be avoided. Rain, etc., so that the installation position of the laser 1 is affected to be inclined, and the position where the laser light emitted from the laser 1 is irradiated on the float 3 is displaced.

It is easy to understand that, the angle of the laser emitted by the laser 1 deviating relative to the vertical angle is obtained according to the laser inclination information, the second position difference of the irradiation position deviating from the center position of the float surface caused by the laser deviation is obtained according to the angle and the triangle similarity principle, and the actual current distance L0 'and the actual second preset height L2' are obtained according to the position difference and the distance compensation information, so as to obtain the current liquid level height.

The floater 3 is provided with a sheet with a convex center, two surfaces of the floater 3 are provided with reflecting surfaces 31, and the reflecting surfaces 31 are used for reflecting laser signals.

It will be readily appreciated that the centre of the float 3 is smoothly convex, preventing the liquid to be measured from accumulating on the float 3 and altering the height of the float surface.

A balance weight 34 is arranged in the inner cavity of the floater 3, two ends of the balance weight 34 are respectively connected with the bottom surface and the top surface of the inner cavity of the floater 3, and the balance weight 34 is positioned at the center of the inner cavity of the floater 3.

It should be noted that, referring to fig. 3, in order to make the center of gravity of the float 3 be balanced in the center of the inside of the float 3, the first level 32 and the first wireless communication module 33 are disposed in the balance weight 34, on one hand, to prevent the float from leaking water to cause the water to enter the inside and damage the electronic devices, and on the other hand, to make the center of gravity of the float be located in the center of the inner cavity.

The diameter of the cross section of the inner wall of the measuring well 2 and the outer diameter of the floater 3 are different by a first preset length; the cross-sectional shape of the float 3 is the same as the cross-sectional shape of the inner wall of the measuring well 2.

It should be noted that the first preset length can be set to be 1-2 mm, so that the float 3 can flexibly and vertically move along with the liquid level in the measurement well 2, and the float 3 is prevented from being stuck in the measurement well 2 to cause a measurement result to be wrong.

The bottom 23 of the measuring well 2 is close to the bottom of the liquid to be measured, and a filter screen is arranged at the bottom 23 of the measuring well 2; the measuring well 2 comprises an inner wall 21 and an outer wall 22, a cavity is formed between the inner wall 21 and the outer wall 22 of the measuring well 2, the outer wall 22 is a filter screen provided with holes with the diameter of a first diameter, and the inner wall 21 is a filter screen provided with holes with the diameter of a second diameter; the first diameter is smaller than the second diameter.

It should be noted that the bottom 23 of the measurement well 2 is close to the bottom of the liquid to be measured, so that the liquid level inside the measurement well 2 is closer to the liquid to be measured, the bottom of the measurement well 2 is prevented from being higher than the liquid level after the liquid level of the liquid to be measured drops, and meanwhile, the filter screen corresponding to the bottom 23 also prevents impurities from entering the bottom of the measurement well 2.

It is easy to understand that the filter screens are all made of anti-rust materials (for example, alloy materials, PVC materials and the like which are not easy to rust), the filter screens do not react with the liquid to be measured, the first diameter can be 1-2 mm, and the mesh openings of the filter screens corresponding to the outer walls 22 are fine, so that solid matters existing in the liquid to be measured are prevented from entering the measuring well 2. For example: the measuring device is used for measuring the water level of a reservoir, aquatic weeds, floating objects and the like exist in the water, and the filter screen can filter various impurities and prevent the impurities from entering the measuring well 2 to cause the float 3 to be coated by the impurities so as to influence the measuring result. The second diameter can be 4cm, and the mesh of the filter screen corresponding to the inner wall 21 is thick, so that the liquid to be measured inside and outside the measuring well 2 is communicated with each other, the liquid level difference is reduced, and the float 3 is prevented from displacing. In a specific implementation, the first diameter and the second diameter may be set according to a specific measured liquid, and this embodiment does not limit this.

This embodiment, through setting up float reflection laser signal, satisfies laser signal's reflection demand, prevents the float displacement through setting up the survey well, acquires the current distance in the time of predetermineeing and prevents that the liquid level fluctuation from influencing measurement accuracy, and the device is simply applicable to multiple liquid of awaiting measuring.

In order to achieve the above object, based on the above laser liquid level measuring device, the present invention further provides a laser liquid level measuring device control method, referring to fig. 5, and fig. 5 is a schematic flow chart of a first embodiment of the laser liquid level measuring device control method according to the present invention.

The method comprises the following steps:

step S10: the laser emits a laser signal to a reflecting surface of the floater, so that the floater reflects the laser signal through the reflecting surface.

It should be noted that the outer surface of the float 3 is made of smooth material, so that the liquid to be measured is not easy to adhere to the outer surface, and the change of the measurement result caused by the change of the distance between the surface of the float and the laser 1 due to the adhesion of the liquid to be measured is prevented. The float 3 is provided with a hollow inner chamber and can stably float on the liquid surface. The wall of the measuring well 2 is provided with a hole, so that liquid to be measured can enter the measuring well, and the liquid in the measuring well is communicated with external liquid; meanwhile, the measuring well can limit the displacement of the floater on the liquid level, and the light emitted by the laser device is prevented from directly irradiating the fluctuating liquid level due to the position deviation of the floater.

Since the laser light emitted from the laser 1 is directly irradiated on the float 3 rather than on the liquid surface, the temperature rise of the liquid surface caused by the laser light being directly irradiated on the liquid surface is not considered. If the liquid level fluctuates, the floater 3 fluctuates along with the liquid level, and the floater 3 is a solid object, so that the movement of the floater is more stable compared with the fluctuation of the liquid level. The reflection requirements of the laser 1 are met by the provision of the float 3.

Step S20: the processor receives the reflected laser signal, acquires the current distance between the floater and the laser according to the reflected laser signal, and acquires the current height of the liquid level according to the first preset height and the current distance within the first preset time.

Wherein the first preset height is the height of the laser from the bottom of the liquid to be measured.

It will be readily appreciated that there may be an error in the current distance at a time directly as the actual distance from the liquid level to the laser, since the float 3 will fluctuate with the liquid level. Therefore, a plurality of current distances within a first preset time are acquired, and an average value of the current distances within the first preset time is acquired as the distance from the laser 1 to the surface of the float 3.

It should be understood that there is a second preset height in addition to the first preset height; the second preset height is a distance from a position, at which the reflecting surface of the float 3 receives the laser signal, to the liquid level, and in specific implementation, the second preset height may be half of the thickness of the float according to the structure of the float 3. And subtracting the second preset height and the current distance according to the first preset height to obtain the current height of the liquid level. Referring to L1-L0-L2 in FIG. 1, the liquid level height of the liquid to be measured is shown.

In this embodiment, through setting up float reflection laser signal, satisfy laser signal's reflection demand, prevent the float displacement through setting up the survey well, acquire the current distance in the time of predetermineeing and prevent that the liquid level fluctuation from influencing measurement accuracy, the device is simply applicable to multiple volume of awaiting measuring liquid.

In addition, in other embodiments of the present invention, the apparatus further includes a first level meter, a first wireless communication module, a second wireless communication module, and a camera; the camera is arranged on the laser, the camera is arranged towards the floater, the first level gauge and the first wireless communication module are arranged inside the floater, and the second wireless communication module is arranged in the laser;

the control method further comprises the following steps:

the step of receiving the reflected laser signal, obtaining the current distance between the floater and the laser according to the reflected laser signal, and obtaining the current height of the liquid level according to the first preset height and the current distance within the first preset time, and then further comprises:

the first gradienter detects the floater inclination angle information of the floater and sends the floater inclination angle information to the second wireless communication module through the first wireless communication module;

the camera acquires a current image of the reflecting surface of the floater and outputs the current image to the processor;

the processor receives floater inclination angle information transmitted by a second wireless communication module and generates distance compensation information according to the floater inclination angle information and the current image;

and the processor corrects the current height of the liquid level according to the distance compensation information so as to obtain the corrected current height of the liquid level.

In addition, in other embodiments of the present invention, a second level is further disposed in the laser;

the control method further comprises the following steps:

the processor corrects the current height of the liquid level according to the distance compensation information to obtain the corrected current height of the liquid level, and the method specifically comprises the following steps:

the second gradienter acquires the laser inclination angle information of the laser and sends the laser inclination angle information to the processor;

and the processor corrects the current height of the liquid level according to the inclination angle information of the laser and the distance compensation information so as to obtain the corrected current height of the liquid level.

It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.

It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.

In addition, technical details that are not described in detail in this embodiment may be referred to a liquid level measuring device of a laser provided in any embodiment of the present invention, and are not described herein again.

Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.