Light source and light receiving and screening device

Abstract

The light source and light receiving and screening device comprises a control cabinet and an outer shell installed above the control cabinet, a light emitting diode detection chamber and a photodiode detection chamber are formed in the left side and the right side of the outer shell correspondingly, and partition plates are installed in the light emitting diode detection chamber and the photodiode detection chamber correspondingly; a row of light source mounting bases are mounted on one side face of the partition plate, elastic clamping assemblies used for clamping a detected device are connected to the interiors of the light emitting diode detection chamber and the photodiode detection chamber, and semiconductor chilling plates are mounted in the light emitting diode detection chamber and the photodiode detection chamber. According to the light source and the light receiving and screening device, the change rule of the induced current of the photodiode along with the temperature is acquired and analyzed at the constant temperature and under the same illumination intensity when the temperature changes, so that the consistency of the light emitting diode and the photodiode can be evaluated and judged, and the detection and screening requirements under different conditions can be met.

Description

Technical Field

[0001] This invention relates to the field of light source and light receiving and screening technology, specifically to a light source and light receiving and screening device. Background Technology

[0002] As core components of measuring instruments, the consistency of light sources and light receivers is particularly important. Due to their manufacturing processes and inherent characteristics, light sources and light receivers inevitably exhibit a certain degree of variation. To improve the accuracy and stability of measuring instruments, it is necessary to select and classify light sources and light receivers during device selection. This ensures that only light sources and light receivers that meet production standards are used in measuring instruments. Currently, there are testing technologies available on the market to screen light sources and light receivers. However, these screening devices still have some problems when in use, such as…

[0003] The prior art, disclosed in patent publication number "CN116735152B" entitled "A Colorimetric Method for Detecting the Identity of Light Sources," discloses a cuvette placed between a standard light emitter and a light receiver under test, and a cuvette placed between the standard light receiver and the light emitter under test. The cuvette is fixed at the top and bottom by a second fixing block and a first fixing block, respectively, and a fixing cap is provided on the top of the cuvette. The standard light emitter 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 under test is connected to the voltage conversion circuit, and the light emitter under test is connected to the constant current source circuit. This invention detects the identity of light sources, quantifies the performance of light sources, and improves accuracy.

[0004] The existing screening devices described above only detect the light source and light receiver using some detection elements. During the detection process, they cannot effectively control the ambient temperature, and therefore cannot collect and analyze the changes in the photodiode induced current with temperature under constant temperature conditions and when the temperature changes. Thus, they cannot meet the detection and screening requirements under different conditions. Therefore, we propose a light source and light receiver screening device to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a light source and light receiver screening device to solve the problem that the screening devices currently on the market mentioned in the background art only use some detection elements to detect the light source and light receiver. During the detection process, the ambient temperature cannot be well controlled, and therefore the photodiode induced current can not be collected and analyzed under constant temperature conditions and when the temperature changes. Thus, it cannot meet the detection and screening requirements under different conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a light source and light receiving and screening device, comprising a control cabinet and an outer casing mounted on top thereof, wherein sealed doors are installed on both the left and right sides of the outer casing, and light-emitting diode (LED) detection chambers and photodiode (PDD) detection chambers are respectively opened inside the left and right sides of the outer casing, and partition plates are installed inside the LED and PDD detection chambers, and a row of light source mounting seats is installed on one side of the partition plates. Elastic clamping components for clamping the devices under test are connected inside the LED and PDD detection chambers, and semiconductor cooling chips are installed inside the LED and PDD detection chambers, and rapid heat conduction pipes are installed inside the LED and PDD detection chambers.

[0007] Preferably, the outer shell is made of sheet metal, and the inside of the outer shell is lined with black insulating cotton to reduce external environmental interference and condensation at low temperatures.

[0008] Preferably, the semiconductor cooling chip is controlled by an electronic component to provide energy, and a heat sink and a fan are installed at the bottom of the semiconductor cooling chip to raise and lower the temperature of the semiconductor cooling chip, ensuring that the semiconductor cooling chip can work normally. A lens collimator is installed on one side of the partition plate in the light-emitting diode detection chamber, and a filter is installed on one side of the partition plate in the photodiode detection chamber. Both the lens collimator and the filter are located below the support plate.

[0009] Preferably, the front side of the outer casing is symmetrically equipped with mounting base plates, and the front side of the mounting base plates is equipped with an outlet and an inlet in sequence from top to bottom. One end of the rapid heat conduction pipe passes through the partition plate and the interior of the mounting base plate and is connected to the inlet, and the other end of the rapid heat conduction pipe passes through the partition plate and the interior of the mounting base plate and is connected to the outlet.

[0010] Preferably, a constant temperature circulating air inlet pipe and a constant temperature circulating air outlet pipe are respectively inserted through the front and rear sides of the light-emitting diode detection chamber and the photodiode detection chamber.

[0011] Preferably, the inner walls of the LED detection chamber and the photodiode detection chamber are slotted and slidably connected to a support plate, and an electric push rod is installed in the slot on the front inner wall of the LED detection chamber and the photodiode detection chamber, and the output end of the electric push rod is connected to one end of the support plate.

[0012] Preferably, the elastic clamping assembly includes a main support block and an auxiliary support block fixedly installed above the support plate, and also includes an elastic clamping fixing block disposed directly above the main support block. A support rod with a "7" shaped structure is symmetrically installed on the outer side of the elastic clamping fixing block, and the lower end of the support rod penetrates the interior of the support plate. The lower end of the support rod is arranged in an inverted "T" shape, and a return spring is nested and connected to the outer side of the support rod located below the support plate.

[0013] Preferably, the main support block and the elastic clamping and fixing block are both arc-shaped, and the auxiliary support block is shaped like a "7". Moreover, a rubber pad is installed on one side of the main support block, the elastic clamping and fixing block and the auxiliary support block.

[0014] Preferably, a self-control board is installed inside the outer casing, and the side of the self-control board away from the light source mounting base is arc-shaped, while the side of the self-control board close to the light source mounting base is horizontally positioned.

[0015] Preferably, a return spring is nested on the outside of the support rod located above the bearing plate, and the elastic clamping fixing block forms a lifting structure through the self-control plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: When the light source and light receiving screening device are in use, the screening device collects and analyzes the variation of the photodiode's induced current with temperature under the same light intensity at both constant temperature and temperature variations. This allows for the evaluation and judgment of the consistency between the light-emitting diode and the photodiode, providing objective data for later use and meeting the detection and screening requirements under different conditions. The specific details are as follows:

[0017] (1) This screening device can detect the light intensity of light-emitting diodes under constant temperature and can adjust the light source driving current to observe the change of light intensity when the current changes. It can also detect the light intensity law with temperature change and the degree of light-emitting diode decay with time. It can collect and analyze the law of photodiode induced current change with temperature under the same light intensity at constant temperature and temperature change, so as to evaluate and judge the consistency of light-emitting diodes and photodiodes, and provide objective data for later use. It can meet the detection and screening needs under different conditions.

[0018] (2) Furthermore, the temperature of the light-emitting diode detection chamber or the photodiode detection chamber can be cooled by the semiconductor cooling chip. By connecting the water outlet and water inlet in the mounting substrate to the fast heat conduction pipe, the temperature of the light-emitting diode detection chamber or the photodiode detection chamber can be conducted to raise the temperature, so as to keep the temperature of the light-emitting diode and the photodiode constant, thereby facilitating the detection of the photodiode at a constant temperature.

[0019] Meanwhile, by connecting the constant temperature circulating air inlet pipe and the constant temperature circulating air outlet pipe with a circulating fan, circulating air can be injected into the LED detection chamber and the photodiode detection chamber respectively, thereby ensuring that the temperature can be quickly stabilized.

[0020] (3) Manually loosen the elastic clamping block. The elastic clamping block can be automatically moved downward by the stored force of the reset spring, so that the elastic clamping block and the main support block can fit well to clamp and fix the light-emitting diode or photodiode, ensuring the stability of the device under test.

[0021] (4) By changing the installation position of the reset spring and using the automatic control board, the light-emitting diode or photodiode can be automatically clamped and automatically released without manual release, making the operation more convenient, saving time and effort, and thus improving the efficiency of subsequent detection and screening. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the left side of the outer casing of the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of the right side of the outer casing of the present invention;

[0025] Figure 4 This is a schematic cross-sectional view of the connection between the support plate and the outer shell of the present invention;

[0026] Figure 5 This is a schematic diagram of the right-side structure of the partition plate of the present invention;

[0027] Figure 6 This is a schematic cross-sectional view of the mounting substrate of the present invention;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the main support block of the present invention;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the elastic clamping and fixing block after it has risen according to the present invention;

[0030] Figure 9 This is a three-dimensional structural diagram of the elastic clamping and fixing block when it is not clamped in Embodiment 2 of the present invention;

[0031] Figure 10 This is a three-dimensional structural diagram of the elastic clamping fixing block in Embodiment 2 of the present invention.

[0032] In the diagram: 1. Control cabinet; 2. Outer casing; 201. Sealed door; 202. LED detection chamber; 203. Photodiode detection chamber; 3. Mounting substrate; 31. Outlet; 32. Inlet; 4. Constant temperature circulating air inlet duct; 5. Constant temperature circulating air outlet duct; 6. Semiconductor cooling chip; 7. Rapid heat conduction pipe; 8. Support plate; 81. Electric push rod; 9. Partition plate; 10. Light source mounting base; 11. Main support block; 12. Elastic clamping fixing block; 13. Auxiliary support block; 14. Support rod; 15. Return spring; 16. Automatic control board; 17. Mirror collimator; 18. Filter. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-10 The present invention provides the following technical solution:

[0035] Example 1: The light source and light receiving and filtering device in this example can meet the detection and filtering requirements under different temperature conditions by adjusting the internal temperature. See attached diagram for the specific structure. Figures 1-8 As shown, the device includes a control cabinet 1 and an outer casing 2 mounted on top of it. Sealed doors 201 are installed on both the left and right sides of the outer casing 2. LED detection chambers 202 and photodiode detection chambers 203 are respectively located inside the left and right sides of the outer casing 2. Partition plates 9 are installed inside both LED detection chambers 202 and photodiode detection chambers 203. A row of light source mounting seats 10 is installed on one side of each partition plate 9. Elastic clamping components for holding the tested devices are connected inside both LED detection chambers 202 and photodiode detection chambers 203. Semiconductor cooling chips 6 are installed inside both LED detection chambers 202 and photodiode detection chambers 203. Rapid heat conduction pipes 7 are also installed inside both LED detection chambers 202 and photodiode detection chambers 203.

[0036] The outer casing 2 is made of sheet metal, and black insulation cotton is pasted inside the outer casing 2 to reduce external environmental interference and condensation at low temperatures. The thermoelectric cooler 6 is controlled by an electronic component to provide energy, and a heat sink and fan are installed at the bottom of the thermoelectric cooler 6 to raise and lower its temperature, ensuring that the thermoelectric cooler 6 can work normally. A lens collimator 17 is installed on one side of the partition plate 9 in the LED detection chamber 202, and a filter 18 is installed on one side of the partition plate 9 in the photodiode detection chamber 203. Both the straightener 17 and the filter 18 are located below the support plate 8. A mounting base 3 is symmetrically mounted on the front side of the outer casing 2. From top to bottom, an outlet 31 and an inlet 32 ​​are sequentially mounted inside the front side of the mounting base 3. One end of the rapid heat conduction pipe 7 penetrates the partition plate 9 and the interior of the mounting base 3, connecting to the inlet 32. The other end of the rapid heat conduction pipe 7 also penetrates the partition plate 9 and the interior of the mounting base 3, connecting to the outlet 31. The front and rear sides of the light-emitting diode detection chamber 202 and the photodiode detection chamber 203 are respectively inserted... The system includes a constant-temperature circulating air inlet duct 4 and a constant-temperature circulating air outlet duct 5. The inner walls of the LED detection chamber 202 and the photodiode detection chamber 203 are slotted and slidably connected to a support plate 8. An electric push rod 81 is installed in a slot on the front inner wall of both the LED detection chamber 202 and the photodiode detection chamber 203, and the output end of the electric push rod 81 is connected to one end of the support plate 8. The elastic clamping assembly includes a main support block 11 and an auxiliary support block 13 fixedly installed above the support plate 8, and also includes an elastic clamping device positioned directly above the main support block 11. The fixed block 12 and the elastic clamping fixed block 12 are symmetrically equipped with support rods 14 in the shape of a "7" on the outside. The lower end of the support rod 14 penetrates the interior of the bearing plate 8 and is set in an inverted "T" shape. A return spring 15 is nested and connected to the outside of the support rod 14 located below the bearing plate 8. The main support block 11 and the elastic clamping fixed block 12 are both set in an arc shape, and the auxiliary support block 13 is set in the shape of a "7". Rubber pads are installed on one side of the main support block 11, the elastic clamping fixed block 12 and the auxiliary support block 13.

[0037] First, open both sealing doors 201. Then, manually pull the elastic clamping block 12 upwards. This causes the support rod 14 to move upwards, compressing and storing the return spring 15. Next, manually place the LED to be tested onto the main support block 11. The LED's lead frame is then placed onto the auxiliary support block 13. Then, manually release the elastic clamping block 12. The stored force of the return spring 15 automatically moves the elastic clamping block 12 downwards to reset. The arc-shaped elastic clamping block 12, in conjunction with the main support block 11, clamps and fixes the LED. Then, similarly, proceed with the other LEDs in sequence. The diode is installed in the LED detection chamber 202, and the photodiode is installed in the photodiode detection chamber 203. Then, the corresponding electric push rod 81 is activated, which moves the support plate 8. The support plate 8 moves the LED and photodiode clamped and fixed above, so that they are inserted into the corresponding light source mounting base 10. Then, the sealing door 201 is closed to ensure that external light does not interfere with the detection. The LED and photodiode can be installed and tested independently when they are facing each other. Four detection holes can be tested at the same time. The LED detection chamber 202 and the photodiode detection chamber 203 are independent chambers, and their own temperature can be controlled.

[0038] When testing is required under constant temperature conditions, if the internal temperature of the outer casing 2 is higher than the constant temperature, the semiconductor cooling chip 6 cools the LED detection chamber 202 or photodiode detection chamber 203. Simultaneously, a temperature sensor inside the outer casing 2 detects the temperature, thus lowering the temperature inside the LED detection chamber 202 or photodiode detection chamber 203 to the constant temperature. If the internal temperature of the outer casing 2 is lower than the constant temperature, the external hot water delivery mechanism is connected to the water inlet 32 ​​inside the mounting substrate 3, allowing hot water to be delivered through the water inlet 32 ​​to the rapid heat conduction pipe 7. Then, the copper rapid heat conduction pipe 7... Heat is conducted to the LED detection chamber 202 or the photodiode detection chamber 203, and finally the hot water in the rapid heat conduction pipe 7 is discharged through the outlet 31. This conduction can raise the temperature of the LED detection chamber 202 and the photodiode detection chamber 203, so as to keep the temperature of the LED and the photodiode constant. This facilitates the detection of the photodiode at a constant temperature. At the same time, by connecting the constant temperature circulating air inlet pipe 4 and the constant temperature circulating air outlet pipe 5 through an external circulating fan, circulating air can be injected into the LED detection chamber 202 and the photodiode detection chamber 203 respectively, so as to ensure rapid and constant temperature.

[0039] When it is necessary to collect and analyze the variation of photodiode induced current with temperature under the same light intensity and temperature changes, the temperature change in the photodiode detection chamber 203 can be controlled by the semiconductor cooling chip 6 or the fast heat conduction pipe 7. The information is collected by the control cabinet 1, and then analyzed and displayed by the computer. This allows for the evaluation and judgment of the consistency between the light-emitting diode and the photodiode, providing objective data for later use and meeting the detection and screening needs under different conditions. At the same time, during detection, the light can be collimated by using the lens collimator 17 to achieve collimation through the refraction and scattering of the lens. The collimated light becomes more parallel, and the filter 18 is used to suppress astigmatic interference, thereby improving the detection accuracy. The specific detection and screening technology and the use of the lens collimator 17 and the filter 18 are existing technologies, so they will not be described in detail here.

[0040] Example 2: Based on Example 1, the light source and light receiving screening device in this example discloses another structure for controlling the lifting and lowering of the elastic clamping fixing block 12. This eliminates the need for manual adjustment of the lifting and lowering of the elastic clamping fixing block 12, thus eliminating the need for manual release of the clamp. Therefore, operation is more convenient and the efficiency of subsequent detection and screening is improved. For the specific structure, please refer to the attached diagram. Figures 9-10 As shown, an automatic control board 16 is installed inside the outer casing 2. The side of the automatic control board 16 away from the light source mounting base 10 is arc-shaped, and the side of the automatic control board 16 close to the light source mounting base 10 is horizontally arranged. A reset spring 15 is nested on the outside of the support rod 14 located above the bearing plate 8, and the elastic clamping fixing block 12 forms a lifting structure through the automatic control board 16.

[0041] In this embodiment, the reset spring 15 is installed above the support plate 8. Therefore, the elastic properties of the reset spring 15 automatically drive the support rod 14 and the elastic clamping block 12 to move upward. At this time, there is no need to manually pull the elastic clamping block 12 upward. Just manually place the light-emitting diode or photodiode on the main support block 11, as shown in Embodiment 1. Then, start the electric push rod 81 to drive the support plate 8 to move. The support plate 8 drives the main support block 11 and the light-emitting diode or photodiode to move slowly together. At this time, the arc-shaped surface of the automatic control board 16 automatically applies a downward push force to the elastic clamping block 12, so that the elastic clamping block 12 drives the support rod 14 to move downward. At this time, the reset spring 15 is compressed and stored, and then the elastic clamping block is fixed. Block 12 clamps and fixes the light-emitting diode or photodiode. Then, the elastic clamping and fixing block 12 comes into contact with the horizontal surface of the self-control board 16. The carrier plate 8 continues to move to insert the light-emitting diode or photodiode into the corresponding light source mounting base 10, as shown above. Similarly, after the detection and screening are completed, the carrier plate 8 only needs to be moved in the reverse direction to reset. Then, when the elastic clamping and fixing block 12 moves to contact the arc surface of the self-control board 16, the stored force of the reset spring 15 will automatically drive the elastic clamping and fixing block 12 to move upward to reset. The light-emitting diode or photodiode can be manually removed from the main support block 11. The operation is convenient and does not require manual release of the clamp, saving time and effort, thereby improving the efficiency of subsequent detection and screening, and thus completing a series of tasks.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A light source and light receiving and filtering device, comprising a control cabinet (1) and an outer housing (2) mounted thereon, wherein sealing doors (201) are installed on both the left and right sides of the outer housing (2), characterized in that: The outer casing (2) has a light-emitting diode detection chamber (202) and a photodiode detection chamber (203) respectively on its left and right sides. Both the light-emitting diode detection chamber (202) and the photodiode detection chamber (203) are equipped with partition plates (9). A row of light source mounting seats (10) is installed on one side of the partition plates (9). The interior of the light-emitting diode detection chamber (202) and the photodiode detection chamber (203) is connected to an elastic clamping component for clamping the device under test. Both the light-emitting diode detection chamber (202) and the photodiode detection chamber (203) are equipped with semiconductor cooling chips (6). Both the light-emitting diode detection chamber (202) and the photodiode detection chamber (203) are equipped with fast heat conduction pipes (7).

2. The light source and light receiving and filtering device according to claim 1, characterized in that: The outer shell (2) is made of sheet metal, and black insulation cotton is pasted inside the outer shell (2) to reduce external environmental interference and condensation at low temperatures.

3. The light source and light receiving and filtering device according to claim 1, characterized in that: The semiconductor cooling chip (6) is controlled by an electronic component to provide energy. A heat sink and a fan are installed at the bottom of the semiconductor cooling chip (6) to raise and lower the temperature of the semiconductor cooling chip (6) and ensure that the semiconductor cooling chip (6) can work normally. A lens collimator (17) is installed on one side of the partition plate (9) in the light-emitting diode detection chamber (202), and a filter (18) is installed on one side of the partition plate (9) in the photodiode detection chamber (203). The lens collimator (17) and the filter (18) are both located below the support plate (8).

4. The light source and light receiving and filtering device according to claim 1, characterized in that: The front side of the outer shell (2) is symmetrically equipped with mounting base plates (3), and the front side of the mounting base plates (3) is equipped with an outlet (31) and an inlet (32) from top to bottom. One end of the rapid heat conduction pipe (7) passes through the partition plate (9) and the interior of the mounting base plates (3) and is connected to the inlet (32). The other end of the rapid heat conduction pipe (7) passes through the partition plate (9) and the interior of the mounting base plates (3) and is connected to the outlet (31).

5. The light source and light receiving and filtering device according to claim 1, characterized in that: The front and rear sides of the light-emitting diode detection chamber (202) and the photodiode detection chamber (203) are respectively penetrated by a constant temperature circulating air inlet pipe (4) and a constant temperature circulating air outlet pipe (5).

6. The light source and light receiving and filtering device according to claim 1, characterized in that: The inner walls of the LED detection chamber (202) and the photodiode detection chamber (203) are slotted and slidably connected to a support plate (8). An electric push rod (81) is installed in the slot on the inner wall of the front side of the LED detection chamber (202) and the photodiode detection chamber (203), and the output end of the electric push rod (81) is connected to one end of the support plate (8).

7. The light source and light receiving and filtering device according to claim 6, characterized in that: The elastic clamping assembly includes a main support block (11) and an auxiliary support block (13) fixedly installed above the support plate (8), and also includes an elastic clamping fixing block (12) set directly above the main support block (11). A support rod (14) with a "7" shaped structure is symmetrically installed on the outer side of the elastic clamping fixing block (12). The lower end of the support rod (14) penetrates the interior of the support plate (8). The lower end of the support rod (14) is set in an inverted "T" shape. A return spring (15) is nested and connected to the outer side of the support rod (14) located below the support plate (8).

8. The light source and light receiving and filtering device according to claim 7, characterized in that: The main support block (11) and the elastic clamping fixing block (12) are both arc-shaped, and the auxiliary support block (13) is shaped like a "7". Rubber pads are installed on one side of the main support block (11), the elastic clamping fixing block (12) and the auxiliary support block (13).

9. The light source and light receiving and filtering device according to claim 7, characterized in that: The housing (2) is equipped with a self-control board (16), and the side of the self-control board (16) away from the light source mounting base (10) is arc-shaped, while the side of the self-control board (16) close to the light source mounting base (10) is horizontal.

10. A light source and light receiving and filtering device according to claim 9, characterized in that: A return spring (15) is nested on the outside of the support rod (14) located above the bearing plate (8), and the elastic clamping fixing block (12) forms a lifting structure through the self-control plate (16).

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