Device for testing consistency of light sources by means of colorimetry

Abstract

A device for testing the consistency of light sources by means of colorimetry, comprising: a support frame (1), which is detachably connected to a standard optical receiver (2), a standard optical transmitter (3), a fixing block for an optical transmitter to be subjected to testing (4), a fixing block for an optical receiver to be subjected to testing (5), first fixing blocks (9) and second fixing blocks (10), wherein the fixing block for the optical transmitter to be subjected to testing (4) fixes the optical transmitter to be subjected to testing (6); the fixing block for the optical receiver to be subjected to testing (5) fixes the optical receiver to be subjected to testing (7); the standard optical transmitter (3) is aligned with the optical receiver to be subjected to testing (7); the standard optical receiver (2) is aligned with the optical transmitter to be subjected to testing (6); a cuvette (8) is provided between the standard optical transmitter (3) and the optical receiver to be subjected to testing (7); a cuvette (8) is provided between the standard optical receiver (2) and the optical transmitter to be subjected to testing (6); the upper portion and the lower portion of each cuvette (8) are respectively fixed by means of one second fixing block (10) and one first fixing block (9); a fixing cap (11) is provided at the top of each cuvette (8); the standard optical transmitter (3) is sequentially connected to a constant-current source circuit (12), a PWM controller (13) and a controller (14); and the standard optical receiver (2) is sequentially connected to a voltage conversion circuit (15) and the controller (14).

Description

A colorimetric light source identity detection device Technical Field

[0001] The present invention relates to the technical field of water quality monitoring equipment, in particular to a colorimetric light source identity detection device for detecting light source identity, quantifying light source performance, and improving accuracy. Background Art

[0002] Water quality monitoring equipment uses colorimetry to measure COD, ammonia nitrogen, total phosphorus, and total nitrogen. Colorimetry determines the content of a quantified component by comparing or measuring the color depth of a colored solution. There are two common colorimetric methods: visual colorimetry and photoelectric colorimetry. Both methods are based on the Lambert-Beer law. The most commonly used visual colorimetric method is the standard series method. This involves placing different amounts of analyte standard solutions in identical colorimetric tubes. The solution is first developed according to the analytical procedure, creating a gradually changing color scale. The sample solution is then developed under identical conditions and compared to the standard scale. The standard solution with the closest color is visually identified. The amount of standard solution contained in the solution is then used to calculate the analyte content in the sample. Compared to visual colorimetry, photoelectric colorimetry eliminates subjective error, improves measurement accuracy, and can eliminate interference through the use of selected filters, thereby increasing selectivity. However, photoelectric colorimeters use tungsten lamps as light sources and filters, making them suitable only for the visible spectrum and for producing composite light within a specific wavelength range, rather than a monochromatic beam.

[0003] For water quality testing, different light sources require different wavelengths for different test parameters. While the software program is the same for different light sources, the uniformity of a large number of light sources cannot be guaranteed, and subtle differences in light intensity can seriously affect test accuracy. A colorimetric light source identity detection device is needed to detect light source identity, quantify light source performance, and improve accuracy.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to provide a colorimetric light source identity detection device for detecting light source identity, quantifying light source performance, and improving accuracy.

[0006] A colorimetric light source identity detection device, comprising:

[0007] A support frame, wherein the support frame is detachably connected to a standard light receiver, a standard light transmitter, a fixed block of the light transmitter to be tested, a fixed block of the light receiver to be tested, a first fixed block, and a second fixed block; the fixed block of the light transmitter to be tested fixes the light transmitter to be tested; the fixed block of the light receiver to be tested fixes the light receiver to be tested; the standard light transmitter and the light receiver to be tested are aligned; the standard light receiver and the light transmitter to be tested are aligned; a cuvette is provided between the standard light transmitter and the light receiver to be tested; a cuvette is provided between the standard light receiver and the light transmitter to be tested; the upper and lower parts of the cuvette are fixed by the second fixed block and the first fixed block respectively; and a fixing cap is provided on the top of the cuvette;

[0008] The standard optical transmitter is connected to the constant current source circuit, the PWM controller, and the controller in sequence; the standard optical receiver is connected to the voltage conversion circuit and the controller in sequence; the controller is connected to the touch screen; the optical receiver to be tested is connected to the voltage conversion circuit; and the optical transmitter to be tested is connected to the constant current source circuit.

[0009] The support frame is a vertically arranged fixing plate, and the standard light receiver, standard light transmitter, to-be-tested light transmitter fixing block, to-be-tested light receiver fixing block, first fixing block and second fixing block are detachably connected to the support frame via bolts.

[0010] The fixed block of the optical transmitter to be tested and the fixed block of the optical receiver to be tested have the same structure. The inner hole groove of the fixed block of the optical transmitter to be tested fits the optical transmitter to be tested, and the optical transmitter to be tested extends out of the end of the fixed block of the optical transmitter to be tested. The inner hole groove of the fixed block of the optical receiver to be tested fits the optical receiver to be tested, and the optical receiver to be tested extends out of the end of the fixed block of the optical receiver to be tested.

[0011] The optical transmitter fixing block to be tested and the optical receiver fixing block to be tested are respectively rectangular blocks, and the inner hole grooves on the optical transmitter fixing block to be tested and the optical receiver fixing block to be tested are through holes.

[0012] The first fixing block and the second fixing block are respectively rectangular blocks.

[0013] A circular countersunk hole is provided at the center of the upper portion of the first fixing block, and the circular countersunk hole is matched with the bottom of the cuvette.

[0014] The cuvette is a glass dish with an upper opening, a lower sealing portion and a circular ring interface.

[0015] The steps of using the colorimetric light source identity detection device are as follows:

[0016] S1: The support frame is detachably connected to the standard light receiver, the standard light transmitter, the fixed block of the light transmitter to be tested, the fixed block of the light receiver to be tested, the first fixed block, and the second fixed block. The cuvette is filled with a self-prepared standard solution of known concentration, and then fixed to the first fixed block and the second fixed block, and sealed with a fixed cap;

[0017] S2: The optical receiver to be tested is installed in a fixed block for the optical receiver to be tested, and the optical receiver to be tested is connected to a voltage conversion circuit; the optical transmitter to be tested is installed in a fixed block for the optical transmitter to be tested, and the optical transmitter to be tested is connected to a constant current source circuit;

[0018] S3: The controller controls the electrical signal of the PWM controller to pass through the constant current source circuit, thereby stimulating the standard light transmitter to emit a standard light signal. The standard light signal passes through the cuvette and is received by the light receiver to be detected. The standard light signal passing through the cuvette is converted into a detection electrical signal. The detection electrical signal is regulated by the voltage conversion circuit and sent to the controller and displayed on the touch screen. S4: The controller controls the electrical signal of the PWM controller to pass through the constant current source circuit, thereby stimulating the light transmitter to be detected to emit a light signal to be detected. The light signal to be detected passes through the cuvette and is received by the standard light receiver. The light signal to be detected passing through the cuvette is converted into another detection electrical signal. The other detection electrical signal is regulated by the voltage conversion circuit and sent to the controller and displayed on the touch screen.

[0019] The data after the detection of the detection electrical signal and the other detection electrical signal are sent to the controller, and the median and average are taken. Then the median and average of the detection electrical signal and the other detection electrical signal are compared one by one, and the corresponding optical transmitters or optical receivers to be detected whose deviations exceed the controller setting range are eliminated to complete the identity detection.

[0020] The support frame of the present invention is detachably connected to a standard light receiver, a standard light transmitter, a fixed block of the light transmitter to be tested, a fixed block of the light receiver to be tested, a first fixed block, and a second fixed block. The fixed block of the light transmitter to be tested fixes the light transmitter to be tested, the fixed block of the light receiver to be tested fixes the light receiver to be tested, the standard light transmitter and the light receiver to be tested are aligned, the standard light receiver and the light transmitter to be tested are aligned, a cuvette is set between the standard light transmitter and the light receiver to be tested, a cuvette is set between the standard light receiver and the light transmitter to be tested, the upper and lower parts of the cuvette are fixed by the second fixed block and the first fixed block respectively, and a fixed cap is set on the top of the cuvette; the standard light transmitter is sequentially connected to a constant current source circuit, a PWM controller, and a controller, the standard light receiver is sequentially connected to a voltage conversion circuit and a controller, the controller is connected to a touch screen, the light receiver to be tested is connected to the voltage conversion circuit, and the light transmitter to be tested is connected to the constant current source circuit. The present invention detects the identity of light sources, quantifies light source performance, and improves accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of the present invention;

[0022] FIG2 is a cross-sectional view of the optical transmitter to be tested according to the present invention;

[0023] FIG3 is a top view of the first fixing block of the present invention;

[0024] FIG4 is a schematic structural diagram of a digestion unit in the prior art;

[0025] In the figure: 1. Support frame, 2. Standard light receiver, 3. Standard light transmitter, 4. Fixing block of light transmitter to be tested, 5. Fixing block of light receiver to be tested, 6. Light transmitter to be tested, 7. Light receiver to be tested, 8. Cuvette, 9. First fixing block, 10. Second fixing block, 11. Fixing cap, 12. Constant current source circuit, 13. PWM controller, 14. Controller, 15. Voltage conversion circuit, 16. Touch screen. DETAILED DESCRIPTION

[0026] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0027] A colorimetric light source identity detection device comprises: a support frame 1, the support frame 1 is detachably connected to a standard light receiver 2, a standard light transmitter 3, a light transmitter fixing block 4 to be detected, a light receiver fixing block 5 to be detected, a first fixing block 9, and a second fixing block 10, the light transmitter fixing block 4 to be detected fixes the light transmitter 6 to be detected, the light receiver fixing block 5 to be detected fixes the light receiver 7 to be detected, the standard light transmitter 3 and the light receiver 7 to be detected are aligned, the standard light receiver 2 and the light transmitter 6 to be detected are aligned, and a standard light transmitter 3 and the light receiver 7 to be detected are provided between the standard light transmitter 3 and the light receiver 7 to be detected. A cuvette 8 is provided between the standard light receiver 2 and the light transmitter to be tested 6. The upper and lower parts of the cuvette 8 are fixed by a second fixing block 10 and a first fixing block 9 respectively. A fixing cap 11 is provided on the top of the cuvette 8. The standard light transmitter 3 is connected to a constant current source circuit 12, a PWM controller 13, and a controller 14 in sequence. The standard light receiver 2 is connected to a voltage conversion circuit 15 and a controller 14 in sequence. The controller 14 is connected to a touch screen 16. The light receiver 7 to be tested is connected to the voltage conversion circuit 15. The light transmitter 6 to be tested is connected to the constant current source circuit 12.

[0028] The support frame 1 is a vertically mounted fixed plate. The standard light receiver 2, standard light transmitter 3, test light transmitter fixing block 4, test light receiver fixing block 5, first fixing block 9, and second fixing block 10 are detachably connected to the support frame 1 via bolts. The test light transmitter fixing block 4 and the test light receiver fixing block 5 have identical structures. The inner groove of the test light transmitter fixing block 4 fits the test light transmitter 6, which extends beyond the end of the test light transmitter fixing block 4. The inner groove of the test light receiver fixing block 5 fits the test light receiver 7, which extends beyond the end of the test light receiver fixing block 5. The test light transmitter fixing block 4 and the test light receiver fixing block 5 are both rectangular blocks, and the inner grooves of the test light transmitter fixing block 4 and the test light receiver fixing block 5 are through-holes. The first fixing block 9 and the second fixing block 10 are both rectangular blocks. A circular countersunk hole is located at the center of the upper portion of the first fixing block 9, which mates with the bottom of the cuvette 8. The cuvette 8 is a glass dish with an upper opening, a lower sealing portion, and a circular interface.

[0029] A colorimetric light source identity detection device is used in the following steps:

[0030] S1: The support frame 1 is detachably connected to the standard light receiver 2, the standard light transmitter 3, the light transmitter fixing block 4 to be tested, the light receiver fixing block 5 to be tested, the first fixing block 9, and the second fixing block 10. The cuvette 8 is filled with a self-prepared standard solution of known concentration, then fixed to the first fixing block 9 and the second fixing block 10, and sealed with a fixing cap 11;

[0031] S2: The optical receiver to be tested 7 is installed in the optical receiver to be tested fixing block 5 and fixed, the optical receiver to be tested 7 is connected to the voltage conversion circuit 15, the optical transmitter to be tested 6 is installed in the optical transmitter to be tested fixing block 4, and the optical transmitter to be tested 6 is connected to the constant current source circuit 12;

[0032] S3: The controller 14 controls the electrical signal of the PWM controller 13 to pass through the constant current source circuit 12, thereby stimulating the standard light emitter 3 to emit a standard light signal. The standard light signal passes through the cuvette 8 and is received by the light receiver 7 to be tested. The standard light signal passing through the cuvette 8 is converted into a detection electrical signal. The detection electrical signal is regulated by the voltage conversion circuit 15 and then sent to the controller 14 and displayed on the touch screen 16.

[0033] S4: The controller 14 controls the electrical signal of the PWM controller 13 to pass through the constant current source circuit 12, thereby stimulating the light emitter 6 to emit a light signal to be detected. The light signal to be detected passes through the cuvette 8 and is received by the standard light receiver 2. The light signal to be detected that passes through the cuvette 8 is converted into another detection electrical signal. The other detection electrical signal is regulated by the voltage conversion circuit 15 and sent to the controller 14 and displayed on the touch screen 16.

[0034] The data after the detection of the detection electrical signal and the other detection electrical signal are sent to the controller 14, and the median and average are taken. Then the median and average of the detection electrical signal and the other detection electrical signal are compared one by one, and the corresponding optical transmitter 6 or optical receiver 7 to be detected whose deviation exceeds the set value range of the controller 14 is eliminated to complete the identity detection.

[0035] In the prior art, the digestion frame is a rectangular frame, which is fixed inside the water quality analyzer. The upper and lower fixed brackets are respectively fixed inside the digestion frame. The upper and lower fixed brackets are arranged horizontally and fix the cuvette. The heater is wrapped around the outer side of the lower part of the cuvette. A temperature sensor is arranged on the side of the heater. The bottom of the cuvette is the liquid inlet and outlet. The liquid inlet and outlet are powered by a peristaltic pump and controlled by a multi-way valve to realize the liquid inlet and outlet. The light emitter and the light receiver are fixed on both sides of the cuvette and are arranged accordingly. During the mass production process, the software program is the same, and the slight difference between the light emitter and the light receiver will seriously affect the detection accuracy of the water quality analyzer. By detecting the identity of the light emitter and the light receiver, the identity detection ensures the stability of the product, greatly improves the accuracy of the equipment, and guarantees product performance.

[0036] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A colorimetric light source identity detection device, characterized in that: include: A support frame (1), wherein the support frame (1) is detachably connected to a standard light receiver (2), a standard light transmitter (3), a light transmitter fixing block (4) to be detected, a light receiver fixing block (5) to be detected, a first fixing block (9), and a second fixing block (10); the light transmitter fixing block (4) to be detected fixes the light transmitter (6) to be detected; the light receiver fixing block (5) to be detected fixes the light receiver (7) to be detected; the standard light transmitter (3) and the light receiver (7) to be detected are aligned; the standard light receiver (2) and the light transmitter (6) to be detected are aligned; a cuvette (8) is arranged between the standard light transmitter (3) and the light receiver (7) to be detected; a cuvette (8) is arranged between the standard light receiver (2) and the light transmitter (6) to be detected; the upper and lower parts of the cuvette (8) are fixed by the second fixing block (10) and the first fixing block (9) respectively; a fixing cap (11) is arranged on the top of the cuvette (8); The standard optical transmitter (3) is connected to a constant current source circuit (12), a PWM controller (13), and a controller (14) in sequence; the standard optical receiver (2) is connected to a voltage conversion circuit (15) and a controller (14) in sequence; the controller (14) is connected to a touch screen (16); the optical receiver to be tested (7) is connected to a voltage conversion circuit (15); and the optical transmitter to be tested (6) is connected to a constant current source circuit (12).

2. A colorimetric light source identity detection device according to claim 1, characterized in that: The support frame (1) is a vertically arranged fixed plate, and the standard light receiver (2), the standard light transmitter (3), the to-be-tested light transmitter fixed block (4), the to-be-tested light receiver fixed block (5), the first fixed block (9), and the second fixed block (10) are respectively detachably connected to the support frame (1) by bolts.

3. A colorimetric light source identity detection device according to claim 1, characterized in that: The optical transmitter to be detected fixing block (4) and the optical receiver to be detected fixing block (5) have the same structure. The inner hole groove of the optical transmitter to be detected fixing block (4) fits the optical transmitter to be detected (6), and the optical transmitter to be detected (6) extends out of the end of the optical transmitter to be detected fixing block (4). The inner hole groove of the optical receiver to be detected fixing block (5) fits the optical receiver to be detected (7), and the optical receiver to be detected (7) extends out of the end of the optical receiver to be detected fixing block (5).

4. A colorimetric light source identity detection device according to claim 1, characterized in that: The optical transmitter to be tested fixing block (4) and the optical receiver to be tested fixing block (5) are respectively rectangular blocks, and the inner hole grooves on the optical transmitter to be tested fixing block (4) and the optical receiver to be tested fixing block (5) are through holes.

5. A colorimetric light source identity detection device according to claim 1, characterized in that: The first fixing block (9) and the second fixing block (10) are respectively rectangular blocks.

6. A colorimetric light source identity detection device according to claim 1, characterized in that: A circular countersunk hole is provided at the center position of the upper part of the first fixing block (9), and the circular countersunk hole matches the bottom of the cuvette (8).

7. A colorimetric light source identity detection device according to claim 1, characterized in that: The cuvette (8) is a glass dish with an opening at the top, a sealing at the bottom, and a circular ring interface.

8. A colorimetric light source identity detection device according to claim 1, characterized in that: The steps of using the colorimetric light source identity detection device are as follows: S1: The support frame (1) is detachably connected to a standard light receiver (2), a standard light transmitter (3), a fixed block of a light transmitter to be tested (4), a fixed block of a light receiver to be tested (5), a first fixed block (9), and a second fixed block (10); the cuvette (8) is filled with a self-prepared standard solution of known concentration, and then fixed to the first fixed block (9) and the second fixed block (10), and sealed with a fixed cap (11); S2: the optical receiver to be detected (7) is installed in the optical receiver to be detected fixing block (5) and fixed, the optical receiver to be detected (7) is connected to the voltage conversion circuit (15), the optical transmitter to be detected (6) is installed in the optical transmitter to be detected fixing block (4), and the optical transmitter to be detected (6) is connected to the constant current source circuit (12); S3: the controller (14) controls the electrical signal of the PWM controller (13) to pass through the constant current source circuit (12), thereby stimulating the standard light transmitter (3) to emit a standard light signal. The standard light signal passes through the cuvette (8) and is received by the light receiver (7) to be detected. The standard light signal passing through the cuvette (8) is converted into a detection electrical signal. The detection electrical signal is regulated by the voltage conversion circuit (15) and then sent to the controller (14), and displayed on the touch screen (16). S4: The controller (14) controls the electrical signal of the PWM controller (13) to pass through the constant current source circuit (12), thereby stimulating the light transmitter to be detected (6) to emit a light signal to be detected. The light signal to be detected passes through the cuvette (8) and is received by the standard light receiver (2). The light signal to be detected that passes through the cuvette (8) is converted into another detection electrical signal. The other detection electrical signal is regulated by the voltage conversion circuit (15) and sent to the controller (14) and displayed on the touch screen (16).

9. A colorimetric light source identity detection device according to claim 8, characterized in that: The data after the detection of the detection electrical signal and the other detection electrical signal are sent to the controller (14), and the median and the average value are taken. Then, the detection electrical signal and the other detection electrical signal are compared one by one in terms of the median and the average value, and the corresponding optical transmitter (6) or optical receiver (7) to be detected whose deviation exceeds the set value range of the controller (14) is eliminated to complete the identity detection.

Images