阅读说明：本技术 一种核酸检测试剂盒液面高度检测装置和方法 (Device and method for detecting liquid level height of nucleic acid detection kit ) 是由 范如超 吴旭峰 王兆军 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种核酸检测试剂盒的液面高度检测装置,机架、轨道、激光测距线性阵列架、运动机构、电路控制和数据处理模块、以及设置在激光测距线性阵列架上的激光测距线性阵列；运动机构用于驱动激光测距线性阵列架沿轨道滑动。所述电路控制和数据处理模块连接运动机构,用于向运动机构发送驱动信号；所述电路控制和数据处理模块连接激光测距线性阵列,用于向激光测距线性阵列发射检测信号,以及接收激光测距线性阵列返回的信号并计算液面高度。本发明可以配合上位机或者微处理器,通过激光测距线性阵列水平扫描的方式,快速准确地检测出核酸检测试剂盒中每个方格内部的液体高度,从而得知哪些方格内的试剂量不符合要求。(The invention discloses a liquid level height detection device of a nucleic acid detection kit, which comprises a rack, a track, a laser ranging linear array frame, a motion mechanism, a circuit control and data processing module and a laser ranging linear array arranged on the laser ranging linear array frame, wherein the track is arranged on the rack; the moving mechanism is used for driving the laser ranging linear array frame to slide along the track. The circuit control and data processing module is connected with the movement mechanism and used for sending a driving signal to the movement mechanism; the circuit control and data processing module is connected with the laser ranging linear array and used for transmitting detection signals to the laser ranging linear array, receiving signals returned by the laser ranging linear array and calculating the height of the liquid level. The invention can be matched with an upper computer or a microprocessor, and the liquid height in each square in the nucleic acid detection kit can be rapidly and accurately detected in a laser ranging linear array horizontal scanning mode, so that the quantity of the reagents in the squares is not qualified.)

1. A liquid level height detection device of a nucleic acid detection kit is characterized by comprising a rack, a track, a laser ranging linear array frame, a motion mechanism, a circuit control and data processing module and a laser ranging linear array arranged on the laser ranging linear array frame;

the track is arranged at the top of the frame, and the movement mechanism is used for driving the laser ranging linear array frame to slide along the track;

the circuit control and data processing module is connected with the movement mechanism and used for sending a driving signal to the movement mechanism; the circuit control and data processing module is connected with the laser ranging linear array and used for transmitting detection signals to the laser ranging linear array, receiving signals returned by the laser ranging linear array and calculating the height of the liquid level.

2. The apparatus for detecting the liquid level of a nucleic acid detecting reagent kit according to claim 1, wherein the track comprises a first track and a second track arranged in parallel; one end of the laser ranging linear array frame is hung on the first rail, and the other end of the laser ranging linear array frame is hung on the second rail; the laser ranging linear array on the laser ranging linear array frame is respectively vertical to the first track and the second track.

3. The apparatus for detecting the liquid level of a nucleic acid detecting kit according to claim 1, wherein the moving mechanism comprises a first stepping motor, a second stepping motor, a first disk wheel, a second disk wheel, a third disk wheel, a fourth disk wheel, a first bearing, a second bearing, a first rotating shaft and a second rotating shaft;

the first stepping motor, the second stepping motor, the first bearing and the second bearing are all arranged on the rack, and the circuit control and data processing module is respectively connected with the first stepping motor and the second stepping motor;

the first rotating shaft is connected with a rotating shaft of a first stepping motor, a first disc wheel, a second disc wheel and a first bearing are respectively connected with the first rotating shaft, the first bearing is positioned between the first disc wheel and the second disc wheel, the first disc wheel is close to the left end of the first track, a steel wire is arranged on the first disc wheel, and the other end of the steel wire is connected with the laser ranging linear array frame; the second disc wheel is close to the left end of the second track, a steel wire is arranged on the second disc wheel, and the other end of the steel wire is connected with the laser ranging linear array frame; the first stepping motor drives the first disk wheel and the second disk wheel to rotate through the first rotating shaft, and the first disk wheel and the second disk wheel drive the laser ranging linear array rack to slide towards the left end of the track through the steel wire;

the second rotating shaft is connected with a rotating shaft of a second stepping motor, a third disc wheel, a fourth disc wheel and a second bearing are respectively connected with the second rotating shaft, the second bearing is positioned between the third disc wheel and the fourth disc wheel, the third disc wheel is close to the right end of the first track, a steel wire is arranged on the third disc wheel, and the other end of the steel wire is connected with the laser ranging linear array frame; the fourth disc wheel is close to the right end of the second track, a steel wire is arranged on the fourth disc wheel, and the other end of the steel wire is connected with the laser ranging linear array frame; and the second stepping motor drives the third disk wheel and the fourth disk wheel to rotate through a second rotating shaft, and the third disk wheel and the fourth disk wheel drive the laser ranging linear array rack to slide towards the right end of the track through steel wires.

4. The apparatus for detecting the liquid level of a nucleic acid detecting kit according to claim 1, wherein the laser ranging linear array frame is a guide rail, the laser ranging linear array comprises laser probes arranged in a straight line, the laser probes are fixed on the guide rail through screws, each laser probe has the same height, and the emitting direction of the laser is vertical and downward.

5. The apparatus for detecting the liquid level of a nucleic acid detecting reagent kit according to claim 4, wherein the number of the laser probes is adjustable, and the distance between the adjacent laser probes is adjustable.

6. The device for detecting the liquid level of the nucleic acid detection kit according to claim 1, wherein the circuit control and data processing module comprises a circuit with a single chip microcomputer as a core and a liquid crystal display screen, and the circuit with the single chip microcomputer as the core is connected with the liquid crystal display screen.

7. A method for detecting the liquid level of a nucleic acid detection kit, which is based on the device of claim 1, comprising the steps of:

step 1, placing a nucleic acid detection kit to be detected below a laser ranging linear array, and inputting kit specifications and geometric parameters through a liquid crystal display screen, wherein the kit specifications refer to the number of columns of the kit and the number of chambers in each column, and the geometric parameters refer to the central distance between adjacent chambers in the same column and the column spacing;

step 2, adjusting the number of the laser probes in the laser ranging linear array to be consistent with the number of the chambers in each row of the kit, and adjusting the distance between the laser probes to be consistent with the central distance between the adjacent chambers in the same row of the kit;

setting the single-step moving distance in the test process of the laser ranging linear array according to the column spacing of the kit;

setting the number of the remaining columns to be detected of the kit, wherein the initial value of the number of the remaining columns to be detected is equal to the number of the columns of the kit;

when the detection device is at an initial position, the laser ranging linear array is positioned at the left end of the track, each laser probe of the laser ranging linear array corresponds to a chamber in the first row of the reagent kit one by one, and firstly, the chamber in the first row of the reagent kit starts to be detected;

step 3, the circuit control and data processing module sends a detection signal to the laser ranging linear array, and the circuit control and data processing module receives a signal returned by the laser ranging linear array and calculates the height of the liquid level; comparing the liquid level height data with the set liquid level height range, displaying the liquid level height data of each chamber in the front detection column on the liquid crystal display, and highlighting the position of the chamber with the liquid level height not conforming to the set range and the corresponding liquid level height value;

completing the detection of the liquid level of the current row of chambers in the kit;

step 4, subtracting 1 from the number of the remaining columns to be detected of the kit, judging whether the current detection column is the last column of the kit 7, and entering step 6 if the number of the remaining columns to be detected is zero; when the number of the remaining columns to be detected is not equal to zero, the current detection column is not the last column, and the step 5 is entered;

step 5, the circuit control and data processing module sends a driving signal to a second stepping motor in a rotating mode, the second stepping motor drives the laser ranging linear array frame to move rightwards one step through a third disc wheel and a fourth disc wheel, the moving distance is equal to the row spacing of the reagent kit, and the step 3 is returned;

and 6, the circuit control and data processing module sends a driving signal to the first stepping motor in a rotating mode, and the first stepping motor drives the laser ranging linear array frame to move leftwards through the first disc wheel and the second disc wheel, so that the laser ranging linear array frame returns to the initial position.

Technical Field

The invention relates to the technical field of detection kits, in particular to a device and a method for detecting the liquid level height of a nucleic acid detection kit.

Background

With the development of molecular biology, along with the development of transgene detection, gene diagnosis, viruses and the like, DNA extraction has become the basis of scientific research in the fields of medicine, agriculture, food and the like. Because of epidemic nucleic acid detection, a plurality of processes such as sampling, extraction, amplification, fluorescence detection and the like are needed to be carried out on a sample, a large quantity of high-flux nucleic acid extraction kit is needed to be used as a nucleic acid sample storage, extraction and amplification tool, different trace amounts of preservation solution, lysis solution, washing solution, separating solution, amplification solution and the like are pre-installed in a large-flux kit, the large-flux kit is generally of an array type partition structure made of organic materials and can detect a plurality of samples at one time, the solutions are pre-installed manually or by machines, but due to manual fatigue or equipment errors, the problems of less solution, insufficient solution, uneven liquid level and the like easily occur, and because the holes are small, the liquid capacity is small, the manual identification difficulty is large, the efficiency is low, the reject rate is high, and the production schedule cannot meet the market demand easily. There is a need for an automatic detection device for the liquid level of a nucleic acid detection kit, which can automatically detect a chamber with an unsatisfactory liquid level in the nucleic acid detection kit.

Disclosure of Invention

The technical problem is as follows: the invention aims to solve the technical problem of providing a device and a method for detecting the liquid level height of a nucleic acid detection kit, which can automatically detect a chamber in the kit, the amount of a reagent of which does not meet a detection standard, and improve the efficiency and the accuracy of nucleic acid detection.

The technical scheme is as follows: the invention discloses a liquid level height detection device of a nucleic acid detection kit, which comprises a rack, a track, a laser ranging linear array frame, a movement mechanism, a circuit control and data processing module and a laser ranging linear array arranged on the laser ranging linear array frame; the track is arranged at the top of the frame, and the movement mechanism is used for driving the laser ranging linear array frame to slide along the track; the circuit control and data processing module is connected with the movement mechanism and used for sending a driving signal to the movement mechanism; the circuit control and data processing module is connected with the laser ranging linear array and used for transmitting detection signals to the laser ranging linear array, receiving signals returned by the laser ranging linear array and calculating the height of the liquid level.

Further, the track comprises a first track and a second track which are arranged in parallel; one end of the laser ranging linear array frame is hung on the first rail, and the other end of the laser ranging linear array frame is hung on the second rail; the laser ranging linear array on the laser ranging linear array frame is respectively vertical to the first track and the second track.

Furthermore, the laser ranging linear array frame is a guide rail, the laser ranging linear array comprises laser probes which are linearly arranged, the laser probes are fixed on the guide rail through screws, the height of each laser probe is the same, and the laser emission direction is vertical downward; the number of the laser probes is adjustable, and the distance between the adjacent laser probes is adjustable.

Furthermore, the circuit control and data processing module comprises a circuit and a liquid crystal display screen, wherein the circuit and the liquid crystal display screen are centered by the single chip microcomputer, and the circuit and the liquid crystal display screen are connected by the single chip microcomputer.

Has the advantages that: the invention detects the liquid level height of the nucleic acid detection kit in a laser ranging mode, and compared with other beam forms such as ultrasonic waves and the like, the invention has the advantages of small divergence angle of laser beams, more concentrated energy, higher test precision and less interference. In the whole detection system, a plurality of laser probes are arranged in a linear array, the distance between every two adjacent probes is equal to the side length of a kit cavity, and the number of the probes is equal to the number of rows of the kit cavity.

The laser ranging technology based on the phase method which is mainstream in the market is adopted. The laser ranging technology based on the phase method can easily overcome the defect of overlarge ultrasonic ranging error, so that the measuring precision reaches the millimeter level, and the laser ranging technology is very suitable for distance measurement in the scene. On the premise of ensuring the measurement precision, the measurement speed is accelerated.

Drawings

FIG. 1 is a schematic diagram of a laser ranging array according to the present invention;

fig. 2 is a flow chart of the present invention.

Wherein, 1, a frame; 2. a first track; 3. a second track; 4. a laser ranging linear array frame; 5. a motion mechanism; 6. laser ranging linear array; 7. a kit;

51. a first stepper motor; 52. a second stepping motor; 53. a first plate wheel; 54. a second reel wheel; 55. a third plate wheel; 56. a fourth plate wheel; 57. a first bearing; 58. a second bearing; 59. a first rotating shaft; 60. a second rotating shaft.

Detailed Description

The invention discloses a liquid level height detection device of a nucleic acid detection kit, which comprises a rack 1, a track, a laser ranging linear array frame 4, a movement mechanism 5, a circuit control and data processing module and a laser ranging linear array 6 arranged on the laser ranging linear array frame 4, wherein the laser ranging linear array 6 faces downwards;

the frame 1 is usually placed or fixed on a table, ensuring the level and mechanical stability of the device of the invention. The frame 1 is a frame structure or a door frame structure made of a metal material.

The track is arranged at the top of the machine frame 1, and the moving mechanism 5 is used for driving the laser ranging linear array frame 4 to slide along the track.

The tracks comprise a first track 2 and a second track 3 which are arranged in parallel; one end of the laser ranging linear array frame 4 is hung on the first track 2, and the other end of the laser ranging linear array frame 4 is hung on the second track 3. The laser ranging linear array 6 on the laser ranging linear array frame 4 is respectively vertical to the first track 2 and the second track 3.

As shown in fig. 1, the movement mechanism 5 includes a first stepping motor 51, a second stepping motor 52, a first disk wheel 53, a second disk wheel 54, a third disk wheel 55, a fourth disk wheel 56, a first bearing 57, a second bearing 58, a first rotation shaft 59, and a second rotation shaft 60. The first stepping motor 51, the second stepping motor 52, the first bearing 57, and the second bearing 58 are provided on the frame 1. The circuit control and data processing module is respectively connected with the first stepping motor and the second stepping motor;

the first rotating shaft 59 is connected with the rotating shaft of the first stepping motor 51, the first disc wheel 53, the second disc wheel 54 and the first bearing 57 are respectively connected with the first rotating shaft 59, the first disc wheel 53 and the second disc wheel 54 are coaxial with the first bearing 57, the first bearing 57 is positioned between the first disc wheel 53 and the second disc wheel 54, the first bearing 57 is adopted to enable the first disc wheel 53 and the second disc wheel 54 to rotate stably, the first disc wheel 53 is close to the left end of the first track 2, a steel wire is arranged on the first disc wheel 53, and the other end of the steel wire is connected with the laser ranging linear array frame 4; the second plate wheel 54 is close to the left end of the second track 3, a steel wire is arranged on the second plate wheel 54, and the other end of the steel wire is connected with the laser ranging linear array frame 4. The first stepping motor 51 drives the first disk wheel 53 and the second disk wheel 54 to rotate through the first rotating shaft 59, and the first disk wheel 53 and the second disk wheel 54 drive the laser ranging linear array frame 4 to slide towards the left end of the track through the steel wire. Two disc wheels are adopted to simultaneously pull the laser ranging linear array frame 4 so as to enable the laser ranging linear array frame to slide stably.

The second rotating shaft 60 is connected with the rotating shaft of the second stepping motor 52, the third disk wheel 55, the fourth disk wheel 56 and the second bearing 58 are respectively connected with the second rotating shaft 60, the third disk wheel 55, the fourth disk wheel 56 and the second bearing 58 are coaxial, the second bearing 58 is positioned between the third disk wheel 55 and the fourth disk wheel 56, the second bearing 58 is adopted to enable the third disk wheel 55 and the fourth disk wheel 56 to rotate stably, the third disk wheel 55 is close to the right end of the first track 2, a steel wire is arranged on the third disk wheel 55, and the other end of the steel wire is connected with the laser ranging linear array frame 4; the fourth plate wheel 56 is close to the right end of the second track 3, a steel wire is arranged on the fourth plate wheel 56, and the other end of the steel wire is connected with the laser ranging linear array frame 4. The second stepping motor 52 drives the third disk wheel 55 and the fourth disk wheel 56 to rotate through the second rotating shaft 60, and the third disk wheel 55 and the fourth disk wheel 56 drive the laser ranging linear array frame 4 to slide towards the right end of the track through the steel wire.

The circuit control and data processing module is connected with the first stepping motor 51 and the second stepping motor 52 and is used for driving the first stepping motor 51 and the second stepping motor 52 to rotate; the circuit control and data processing module is connected with the laser ranging linear array 6 and used for transmitting detection signals to the laser ranging linear array 6, receiving reflected light signals of the laser ranging linear array 6 and calculating the height of the liquid level.

The circuit control and data processing module comprises a circuit taking the single chip microcomputer as a core and a liquid crystal display screen, the circuit taking the single chip microcomputer as the core is connected with the liquid crystal display screen, and the liquid crystal display screen is used for displaying position information of the 7 chambers of the kit and liquid level data in each chamber.

The laser ranging linear array frame 4 is a guide rail, the laser ranging linear array 6 comprises laser probes which are linearly arranged, the laser probes are fixed on the guide rail through screws, the height of each laser ranging probe is consistent, and the laser emission direction is vertical downward. The number of the laser probes is adjustable, the number of the laser probes is adjusted to be consistent with the number of the chambers in each row of the reagent kit 7, the distance between the adjacent laser probes is adjustable, and the distance between the adjacent laser probes is equal to the central distance between the adjacent chambers in the same row of the reagent kit 7. According to the current commonly used kit specification, 15 laser probes can be connected to the guide rail at most, corresponding interfaces are reserved, and the laser probes are connected with the circuit control and data processing module through connectors with fixed specifications. The laser probe adopts a visible laser, so that the observation of workers at any time is facilitated.

The following describes a method for detecting the liquid level of a nucleic acid detection kit according to the present invention, which is based on a device for detecting the liquid level of a nucleic acid detection kit, as shown in fig. 2, and comprises the following steps:

step 1, placing a nucleic acid detection kit 7 to be detected below a laser ranging linear array 6, and inputting kit specifications and geometric parameters through a liquid crystal display screen, wherein the kit specifications refer to the number of columns of the kit 7 and the number of chambers in each column, and the geometric parameters refer to the central distance between adjacent chambers in the same column of the kit 7 and the column spacing of the kit 7;

step 2, adjusting the number of the laser probes in the laser ranging linear array 6 to be consistent with the number of the chambers in each row of the reagent kit 7, and adjusting the distance between the laser probes to be consistent with the central distance between the adjacent chambers in the same row of the reagent kit 7;

and determining the distance of single step movement in the test process of the laser ranging linear array 6 according to the column spacing of the reagent box 7.

At the initial position, the laser ranging linear arrays 6 are located at the left end of the track, and each laser probe of the laser ranging linear array 6 corresponds to a chamber in the first row of the reagent kit 7 one by one, namely, the laser emitted by each laser probe can irradiate into the chambers in the first row of the reagent kit 7. The detection is first started for the chamber of the first column of the cartridge 7.

Step 3, the circuit control and data processing module sends a detection signal to the laser ranging linear array 6, the laser ranging linear array 6 sends laser, the laser returns to the laser ranging linear array 6 after reaching the liquid level in the chamber, and the circuit control and data processing module receives the signal returned by the laser ranging linear array 6 and calculates the height of the liquid level; and comparing the liquid level data with the set liquid level range, displaying the liquid level data of each chamber in the front detection column on the liquid crystal display, and highlighting the position of the chamber with the liquid level which does not conform to the set range and the corresponding liquid level value. And the chamber positions of insufficient height are recorded for refilling the chambers with liquid. Completing the detection of the liquid level of the current row of chambers in the kit 7;

step 4, in the circuit control and data processing module, subtracting 1 from the number of the remaining columns to be detected of the kit, judging whether the current detection column is the last column of the kit 7, and entering step 6 if the number of the remaining columns to be detected is zero; when the number of the remaining columns to be detected is not equal to zero, the current detection column is not the last column, and the step 5 is entered;

step 5, the circuit control and data processing module sends a driving signal to the second stepping motor 52 in a rotating mode, the second stepping motor 52 drives the laser ranging linear array frame 4 to move rightwards one step through the third disk wheel 55 and the fourth disk wheel 56, the moving distance is equal to the row spacing of the reagent kit 7, and the step 3 is returned;

and 6, the circuit control and data processing module transmits a driving signal to the first stepping motor 51 in a rotating mode, and the first stepping motor 51 drives the laser ranging linear array frame 4 to move leftwards through the first disc wheel 53 and the second disc wheel 54, so that the laser ranging linear array frame 4 returns to the initial position.