Tool for testing electrical characteristics of photoelectric switch

Abstract

The utility model discloses a photoelectric switch electrical characteristic test fixture, relates to the technical field of photoelectric switch performance test, and mainly aims to accurately simulate the operation environment of a photoelectric switch under different working distances. According to the main technical scheme, the photoelectric switch electrical characteristic testing jig comprises a testing table, a camera obscura is arranged on the testing table, a first vertical plate and a second vertical plate are oppositely arranged in the camera obscura, a first light hole is formed in the first vertical plate and serves as a light path channel of the transmitting end of a photoelectric switch, and a second light hole is formed in the second vertical plate and serves as a light path channel of the transmitting end of the photoelectric switch. A second light hole is formed in the second vertical plate, the second light hole is a light path channel of the receiving end of the photoelectric switch, and the spacing distance between the first light hole and the second light hole is adjustable.

Description

Technical Field

[0001] This application belongs to the field of photoelectric switch performance testing technology, specifically relating to a photoelectric switch electrical characteristic testing fixture. Background Technology

[0002] Photoelectric switches occupy an indispensable position in modern industrial automation and numerous electronic equipment applications. Based on the principle of non-contact detection, they possess significant characteristics such as fast response speed, high accuracy, and strong reliability, making them widely used in various scenarios such as position detection, counting, limit control, and material identification. In the material handling process of automated production lines, photoelectric switches can accurately sense the position and movement of materials, providing crucial information for precise control of subsequent processing, sorting, and packaging. Within the scope of security monitoring systems, they can effectively monitor intrusion into specific areas, playing an important early warning role.

[0003] With the continuous expansion of the application scope and depth of photoelectric switches and the ongoing innovation of related technologies, the requirements for the accuracy and comprehensiveness of their electrical characteristic testing are becoming increasingly stringent. Existing photoelectric switch electrical characteristic testing fixtures have significant limitations in their structural design. For example, the vertical plate used to fix the transmitter and receiver of the photoelectric switch has a fixed position, which prevents flexible adjustment of the distance between the transmitter and receiver during photoelectric switch testing. Since the electrical characteristics of photoelectric switches vary at different working distances, traditional testing fixtures cannot simulate these diverse working distance conditions, thus failing to comprehensively and deeply evaluate the electrical characteristics of photoelectric switches under different distance scenarios, such as signal transmission characteristics and changes in response sensitivity. This limitation severely restricts the R&D optimization process of photoelectric switches and the effective control of product quality. There is an urgent need for a new type of photoelectric switch electrical characteristic testing fixture that can overcome the above defects and flexibly adjust the distance between the transmitter and receiver to meet the stringent requirements for accurate testing in the development and application of photoelectric switch technology, and improve the reliability and stability of photoelectric switches in various fields. Utility Model Content

[0004] In view of this, this application provides a test fixture for the electrical characteristics of a photoelectric switch, the main purpose of which is to accurately simulate the operating environment of the photoelectric switch at different working distances.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions:

[0006] This application provides a test fixture for the electrical characteristics of a photoelectric switch, including a test platform. A dark box is provided on the test platform, and a first vertical plate and a second vertical plate are arranged opposite each other inside the dark box. A first light-transmitting hole is opened on the first vertical plate, which is the optical path channel of the photoelectric switch's transmitting end. A second light-transmitting hole is opened on the second vertical plate, which is the optical path channel of the photoelectric switch's receiving end. The interval between the first light-transmitting hole and the second light-transmitting hole is adjustable.

[0007] Optionally, the test bench is provided with a guide rail, which extends along the relative directions of the first vertical plate and the second vertical plate, and the first vertical plate is slidably disposed on the guide rail.

[0008] Optionally, the photoelectric switch electrical characteristic testing fixture further includes a drive unit, a transmission part, and a lead screw. The lead screw is engaged with the first vertical plate through a pipe thread. The first end of the transmission part is connected to the lead screw, and the second end of the transmission part is connected to the drive unit. The drive unit is used to drive the transmission part to move, so as to move the first vertical plate through the lead screw.

[0009] Optionally, the drive unit is a motor, and the transmission part is one of a gear transmission assembly, a belt transmission assembly, and a chain transmission assembly.

[0010] Optionally, when the transmission part is a gear transmission assembly, the transmission part includes a first cylindrical gear and a second cylindrical gear. The second cylindrical gear is sleeved on the lead screw and meshes with the first cylindrical gear. The first cylindrical gear is connected to the drive end of the drive unit. The drive unit is used to drive the first cylindrical gear to rotate, so as to drive the lead screw to rotate synchronously through the second cylindrical gear.

[0011] Optionally, the photoelectric switch electrical characteristic test fixture also includes a control unit, which is connected to the drive unit.

[0012] Optionally, the end of the lead screw near the drive unit is connected to a first fixing block via a first bearing, and the end of the lead screw away from the drive unit is connected to a second fixing block via a second bearing.

[0013] Optionally, retaining rings are provided at both ends of the first bearing in the axial direction.

[0014] Optionally, a first adsorption unit is provided on the side of the first vertical plate opposite to the second vertical plate. The first adsorption unit is used to adsorb the first clamping plate, and the first clamping plate is used to fix the photoelectric switch transmitter.

[0015] A second adsorption unit is provided on the side of the second vertical plate opposite to the first vertical plate. The second adsorption unit is used to adsorb the second clamping plate, and the second clamping plate is used to fix the photoelectric switch receiving end.

[0016] Optionally, at least one side of the dark box is open.

[0017] By employing the above technical solution, this application has at least the following beneficial effects:

[0018] The photoelectric switch electrical characteristic testing fixture provided in the embodiments of this application can accurately simulate the actual application scenarios of the photoelectric switch at different working distances by setting the interval between the first and second light-transmitting holes to be adjustable. This allows operators to comprehensively test and obtain the electrical characteristic data of the photoelectric switch under these different distance conditions, thereby providing richer and more accurate basis for the performance evaluation of the photoelectric switch. This helps to optimize the design of the photoelectric switch in the research and development stage and improve product quality and applicability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a photoelectric switch electrical characteristic testing fixture according to an optional embodiment of this application;

[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of the first vertical plate facing away from the second vertical plate in an optional embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of the second vertical plate facing away from the first vertical plate in an optional embodiment of this application.

[0023] The reference numerals in the attached figures are as follows:

[0024] 1. Test platform; 2. Dark box; 3. First vertical plate; 31. First light-transmitting hole; 4. Second vertical plate; 41. Second light-transmitting hole; 5. Guide rail; 6. Drive unit; 7. Transmission unit; 71. First cylindrical gear; 72. Second cylindrical gear; 8. Lead screw; 9. First fixing block; 10. Second fixing block; 11. First adsorption unit; 12. First clamping plate; 13. Second adsorption unit; 14. Second clamping plate; 15. Photoelectric switch transmitter; 16. Photoelectric switch receiver. Detailed Implementation

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0029] See also Figures 1 to 4 As shown, according to an embodiment of this application, a test fixture for testing the electrical characteristics of a photoelectric switch is provided, including a test platform 1. A dark box 2 is provided on the test platform 1. A first vertical plate 3 and a second vertical plate 4 are arranged opposite to each other inside the dark box 2. A first light-transmitting hole 31 is opened on the first vertical plate 3, which is the optical path channel of the photoelectric switch transmitter 15. A second light-transmitting hole 41 is opened on the second vertical plate 4, which is the optical path channel of the photoelectric switch receiver 16. The interval between the first light-transmitting hole 31 and the second light-transmitting hole 41 is adjustable.

[0030] In this embodiment, by setting the interval between the first light-transmitting hole 31 and the second light-transmitting hole 41 to be adjustable, the actual application scenarios of the photoelectric switch under different working distances can be accurately simulated. This allows operators to comprehensively test and obtain electrical characteristic data of the photoelectric switch under these different distance conditions, thereby providing richer and more accurate basis for the performance evaluation of the photoelectric switch. This helps to optimize the design of the photoelectric switch in the research and development stage and improve product quality and applicability.

[0031] Among them, the test stand 1 is the basic support component of the entire photoelectric switch electrical characteristic test fixture. It provides a stable placement platform for the dark box 2 and various components subsequently installed on it, ensuring that the photoelectric switch electrical characteristic test fixture will not shake or shift due to external factors during the test, thereby ensuring the accuracy and reliability of the test results.

[0032] The dark box 2 is set on the test bench 1, and its main function is to create a relatively enclosed and light-proof testing environment. It is understandable that the working principle of the photoelectric switch is based on the emission and reception of light signals. External stray light may interfere with the test optical path, causing the photoelectric switch receiver 16 to receive incorrect or unstable light signals, thus affecting the accurate testing of its electrical characteristics. The dark box 2 effectively blocks external light from entering, reducing stray light interference with the test and allowing the test to be conducted in a relatively pure light environment.

[0033] The dark box 2 contains a first vertical plate 3 and a second vertical plate 4 arranged opposite each other. The first vertical plate 3 is used to fix the photoelectric switch transmitter 15, and the second vertical plate 4 is used to fix the photoelectric switch receiver 16. It can be understood that the distance between the first vertical plate 3 and the second vertical plate 4 is the working distance of the photoelectric switch.

[0034] The first vertical plate 3 has a first light-transmitting hole 31, which serves as the optical path channel for the photoelectric switch transmitter 15. When the photoelectric switch transmitter 15 is installed on the first vertical plate 3, the emitted light signal can propagate through the first light-transmitting hole 31 in the dark box 2 and move towards the second vertical plate 4 so that it can be received by the photoelectric switch receiver 16.

[0035] The second vertical plate 4 has a second light-transmitting hole 41, which serves as the optical path channel for the photoelectric switch receiver. The light signal transmitted from the first light-transmitting hole 31 passes through the space inside the dark box 2 and can only be received by the photoelectric switch receiver 16 through the second light-transmitting hole 41, thus determining the basic optical path direction for the photoelectric switch's transmission and reception.

[0036] Specifically, in this embodiment, the distance between the first light-transmitting hole 31 and the second light-transmitting hole 41 is adjustable. That is, the distance between the first vertical plate 3 and the second vertical plate 4 is adjustable to adjust the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16. This allows the electrical characteristic testing fixture for the photoelectric switch to simulate various working distance conditions that the photoelectric switch may encounter in actual applications, thereby comprehensively and accurately testing the electrical characteristics of the photoelectric switch at different distances, such as signal transmission characteristics and changes in response sensitivity.

[0037] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, a guide rail 5 is provided on the test bench 1. The guide rail 5 extends along the relative direction of the first vertical plate 3 and the second vertical plate 4. The first vertical plate 3 is slidably mounted on the guide rail 5.

[0038] In this embodiment, by setting the guide rail 5, the first vertical plate 3 can slide closer to or further away from the second vertical plate 4 in the direction facing the second vertical plate 4, thereby adjusting the interval between the first vertical plate 3 and the second vertical plate 4.

[0039] The guide rail 5 is located on the upper surface of the test bench 1 and extends along the length of the test bench 1.

[0040] Specifically, the bottom of the first vertical plate 3 is provided with a slider or groove that matches the guide rail 5. This allows the first vertical plate 3 to move smoothly along the extension direction of the guide rail 5, thereby changing the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16.

[0041] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the photoelectric switch electrical characteristic test fixture also includes a drive unit 6, a transmission part 7, and a lead screw 8. The lead screw 8 is engaged with the first vertical plate 3 through a pipe thread. The first end of the transmission part 7 is connected to the lead screw 8, and the second end of the transmission part 7 is connected to the drive unit 6. The drive unit 6 is used to drive the transmission part 7 to move, so as to drive the first vertical plate 3 to move through the lead screw 8.

[0042] In this embodiment, the lead screw 8 engages with the pipe thread of the first vertical plate 3, allowing for precise adjustment of the distance between the first vertical plate 3 and the second vertical plate 4. It should be noted that the pitch of the lead screw 8 is fixed. When the drive unit 6 drives the transmission unit 7 to rotate the lead screw 8, the first vertical plate 3 moves a fixed distance along the axial direction of the lead screw 8 for each rotation of the lead screw 8. This allows the operator to precisely control the movement of the first vertical plate 3 according to the testing requirements of the photoelectric switch, thereby accurately adjusting the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16.

[0043] The drive unit 6 is the power source for the movement of the first vertical plate 3. For example, the drive unit 6 can be a stepper motor, servo motor, or other device capable of providing rotational power. In practical applications, the drive unit 6 is used to generate torque to provide power for the movement of the first vertical plate 3.

[0044] Specifically, the drive unit 6 is connected to the lead screw 8 via a transmission part 7. The transmission part 7 can be one of a gear drive assembly, a belt drive assembly, or a chain drive assembly. It is understood that if the transmission part 7 is a gear drive assembly, it has high transmission efficiency and a precise transmission ratio. The meshing of gears of different sizes allows the power of the drive unit 6 to be transmitted to the lead screw 8 according to a pre-designed ratio, achieving precise control over the moving speed and displacement of the first vertical plate 3. If the transmission part 7 is a belt drive assembly, it has good buffering and vibration absorption characteristics. The belt can absorb the vibration and impact generated during the operation of the drive unit 6 to a certain extent, making the power transmitted to the lead screw 8 more stable. If the transmission part 7 is a chain drive assembly, it has strong load-bearing capacity and reliability. The meshing method between the chain and the sprocket allows it to work stably under large load conditions.

[0045] The lead screw 8 has a threaded outer surface, and the first vertical plate 3 has a matching internal thread (pipe thread). When the lead screw 8 rotates under the drive of the transmission part 7, the rotational motion of the lead screw 8 is converted into the axial movement of the first vertical plate 3 due to the helix angle of the thread and the friction between the threads, thereby driving the first vertical plate 3 to move forward or backward along the axial direction of the lead screw 8.

[0046] Specifically, when the lead screw 8 drives the first vertical plate 3 to move, although the threaded engagement between the lead screw 8 and the first vertical plate 3 can convert rotational motion into linear motion, the first vertical plate 3 may exhibit a slight rotational tendency or skewness solely due to the guidance of the thread. In this embodiment, the guide rail 5 ensures that the first vertical plate 3 moves linearly along a predetermined direction (i.e., the direction opposite to the second vertical plate 4), restricting its degrees of freedom in other directions and preventing unnecessary rotation or deviation from the preset movement path of the first vertical plate 3.

[0047] In the above embodiments, see Figure 1 and Figure 2 As shown, when the transmission part 7 is a gear transmission assembly, the transmission part 7 includes a first cylindrical gear 71 and a second cylindrical gear 72. The second cylindrical gear 72 is sleeved on the lead screw 8 and meshes with the first cylindrical gear 71. The first cylindrical gear 71 is connected to the drive end of the drive unit 6. The drive unit 6 is used to drive the first cylindrical gear 71 to rotate, so as to drive the lead screw 8 to rotate synchronously through the second cylindrical gear 72.

[0048] In this embodiment, the number of teeth of the first cylindrical gear 71 is less than the number of teeth of the second cylindrical gear 72. When the gear transmission assembly composed of the first cylindrical gear 71 and the second cylindrical gear 72 is used, the gear transmission assembly has a deceleration effect, which enables precise control of the rotation speed of the lead screw 8 when the rotation speed of the drive unit 6 is constant, thereby precisely controlling the moving speed of the first vertical plate 3 to meet the accuracy requirements for adjusting the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16.

[0049] Specifically, the first cylindrical gear 71 is the power input gear. When the drive unit 6 rotates, it drives the first cylindrical gear 71 to rotate as well. The second cylindrical gear 72, which is sleeved on the lead screw 8, can transmit the power from the first cylindrical gear 71 to the lead screw 8. Since the lead screw 8 and the second cylindrical gear 72 are coaxial, when the second cylindrical gear 72 rotates, the lead screw 8 will rotate synchronously. The thread on the outer surface of the lead screw 8 engages with the internal thread (pipe thread) on the first vertical plate 3. When the lead screw 8 rotates, it converts the rotational motion into the axial linear motion of the first vertical plate 3, thereby realizing the movement of the first vertical plate 3 and achieving the purpose of adjusting the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16.

[0050] In some possible embodiments disclosed in this application, the photoelectric switch electrical characteristic test fixture further includes a control unit, which is connected to the drive unit 6.

[0051] In this embodiment, the control unit is connected to the drive unit 6, enabling high-precision control of the movement distance of the first vertical plate 3. It should be noted that the control unit can precisely control the number of rotations or angle of the drive unit 6 according to preset test parameters, thereby accurately adjusting the rotation of the lead screw 8. Since the lead screw 8 and the first vertical plate 3 are connected by a thread, the precise rotation of the lead screw 8 can be converted into the precise displacement of the first vertical plate 3.

[0052] Specifically, the control unit can be an STM32 series microcontroller. The connection between the control unit and the drive unit 6 can be wired, such as through signal lines or ribbon cables, or wireless, such as using Bluetooth, Wi-Fi, or other wireless communication protocols. This allows the control unit to send control commands to the drive unit 6, while the drive unit 6 can also feed back its own status information (such as speed, torque, etc.) to the control unit, establishing a two-way communication link.

[0053] In some possible implementations disclosed in this application, participants Figure 1 As shown, the end of the lead screw 8 closest to the drive unit 6 is connected to a first fixing block 9 via a first bearing, and the end of the lead screw 8 furthest from the drive unit 6 is connected to a second fixing block 10 via a second bearing.

[0054] In this embodiment, the first fixing block 9 and the second fixing block 10 provide stable support for the lead screw 8 through the first bearing and the second bearing, which can withstand the axial and radial loads of the lead screw 8 and ensure that the lead screw 8 will not move axially during rotation. This avoids the position of the first vertical plate 3 that cooperates with the lead screw 8 from deviating, making it impossible to accurately adjust the distance between the photoelectric switch transmitter 15 and the photoelectric switch receiver 16, thereby affecting the accuracy of the photoelectric switch electrical characteristic test.

[0055] The first bearing installed at the end of the lead screw 8 near the drive unit 6 connects the lead screw 8 to the first fixing block 9, which supports the end of the lead screw 8 near the drive unit 6. In practical applications, the first fixing block 9 is fixed on the test bench 1. The inner ring of the first bearing is tightly fitted with the lead screw 8, and the inner ring rotates with the lead screw 8. The outer ring of the bearing fits into the mounting hole of the first fixing block 9 and is fixed in the first fixing block 9, thereby enabling the lead screw 8 to rotate stably relative to the first fixing block 9.

[0056] The second bearing installed at the end of the lead screw 8 furthest from the drive unit 6 connects the lead screw 8 to the second fixing block 10, which supports the end of the lead screw 8 furthest from the drive unit 6. In practical applications, the second fixing block 10 is also fixed to the test bench 1. The inner and outer rings of the second bearing engage with the lead screw 8 and the second fixing block 10 in the same way as the first bearing. This ensures stable support at both ends of the lead screw 8, guaranteeing that the lead screw 8 maintains the correct position along its entire length and can rotate smoothly.

[0057] In the above embodiments, see Figure 1 As shown, retaining rings are provided at both ends of the first bearing in the axial direction.

[0058] In this embodiment, retaining rings are installed at both ends of the first bearing in the axial direction. Their main function is to accurately position the bearing axially, preventing axial transmission of the first bearing and affecting the normal operation of the lead screw 8. It should be noted that during the operation of the lead screw 8, the first bearing may experience axial displacement due to factors such as rotation and axial force. At this time, the retaining rings act like two "positioners," tightly holding the bearing in place and ensuring that the first bearing remains in the predetermined position in the axial direction, preventing it from moving arbitrarily.

[0059] In some possible implementations disclosed in this application, participants Figure 1 , Figure 3 and Figure 4As shown, a first adsorption unit 11 is provided on the side of the first vertical plate 3 away from the second vertical plate 4. The first adsorption unit 11 is used to adsorb the first clamping plate 12, and the first clamping plate 12 is used to fix the photoelectric switch transmitter 15. A second adsorption unit 13 is provided on the side of the second vertical plate 4 away from the first vertical plate 3. The second adsorption unit 13 is used to adsorb the second clamping plate 14, and the second clamping plate 14 is used to fix the photoelectric switch receiver 16.

[0060] In this embodiment, the first adsorption unit 11 and the second adsorption unit 13 are used to adsorb the first clamping plate 12 and the second clamping plate 14, respectively. This adsorption-type fixing method makes the installation and removal of the photoelectric switch transmitter 15 and the photoelectric switch receiver 16 very convenient. Compared with traditional methods such as glue or screw fixing, no complicated operations using tools are required.

[0061] The first adsorption unit 11 and the second adsorption unit 13 can be electromagnets or vacuum adsorption devices. For example, when the first adsorption unit 11 is an electromagnet, the current passing through the electromagnet generates a magnetic field, which attracts the first clamping plate 12, causing it to be tightly adsorbed onto the first vertical plate 3, thus achieving the purpose of clamping the photoelectric switch transmitter 15. When the first adsorption unit 11 is a vacuum adsorption device, a vacuum area is formed between the first adsorption unit 11 and the first clamping plate 12, and atmospheric pressure is used to adsorb the first clamping plate 12, thereby achieving the purpose of clamping the photoelectric switch transmitter 15. It should be noted that when the second adsorption unit 13 is an electromagnet or a vacuum adsorption device, the working principle of the second adsorption unit 13 is the same as that of the first adsorption unit 11, and will not be described again here.

[0062] The first clamping plate 12 is a component for fixing the photoelectric switch transmitter 15. Its shape and size match the photoelectric switch transmitter 15 to ensure good contact and fixation. The second clamping plate 14 is a component for fixing the photoelectric switch receiver 16. Its shape and size match the photoelectric switch receiver 16 to ensure good contact and fixation. For example, both the first clamping plate 12 and the second clamping plate 14 are arc-shaped clamps.

[0063] Specifically, in practical applications, the first adsorption unit 11 adsorbs the first clamping plate 12, ensuring that the first clamping plate 12 is tightly attached to the first vertical plate 3. When the photoelectric switch transmitter 15 is placed on the first clamping plate 12, the first clamping plate 12 clamps and fixes the photoelectric switch transmitter 15, ensuring that the position of the photoelectric switch transmitter 15 is relatively stable during the testing process. The second adsorption unit 13 adsorbs the second clamping plate 14, ensuring that the second clamping plate 14 is tightly attached to the second vertical plate 4. When the photoelectric switch receiver 16 is placed on the second clamping plate 14, the second clamping plate 14 clamps and fixes the photoelectric switch receiver 16, ensuring that the position of the photoelectric switch receiver 16 is relatively stable during the testing process.

[0064] In some possible implementations disclosed in this application, participants Figure 1 As shown, at least one side of the dark box 2 is open.

[0065] In this embodiment, by setting at least one side of the dark box 2 to be open to the actual application environment of the photoelectric switch, the test results are avoided from being overly rationalized. It should be noted that in actual application scenarios, photoelectric switches often need to operate under certain ambient light. If testing is only conducted in a closed environment, the photoelectric switch's ability to resist light interference in actual use may be overlooked, leading to deviations between the test results and actual usage conditions.

[0066] Specifically, in this embodiment, the dark box 2 is not a completely closed hexahedral structure. Geometrically, the dark box 2 may have one open side, and the specific number and location of the open sides can be determined according to the testing requirements. For example, it may be that only one side can be opened and closed like a door, making it convenient for operators to put in or take out the photoelectric switch and its related components; or it may be that two adjacent sides are open, forming an "L"-shaped opening, providing a wider operating space for the testing process.

[0067] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A fixture for testing the electrical characteristics of a photoelectric switch, characterized in that, The test platform (1) includes a dark box (2) on which a first vertical plate (3) and a second vertical plate (4) are arranged opposite each other. The first vertical plate (3) has a first light-transmitting hole (31) which is the optical path channel of the photoelectric switch transmitter (15). The second vertical plate (4) has a second light-transmitting hole (41) which is the optical path channel of the photoelectric switch receiver (16). The distance between the first light-transmitting hole (31) and the second light-transmitting hole (41) is adjustable.

2. The photoelectric switch electrical characteristic testing fixture according to claim 1, characterized in that, The test bench (1) is provided with a guide rail (5), which extends along the relative directions of the first vertical plate (3) and the second vertical plate (4), and the first vertical plate (3) is slidably disposed on the guide rail (5).

3. The photoelectric switch electrical characteristic testing fixture according to claim 1, characterized in that, It also includes a drive unit (6), a transmission part (7) and a lead screw (8). The lead screw (8) is connected to the first vertical plate (3) through a pipe thread. The first end of the transmission part (7) is connected to the lead screw (8), and the second end of the transmission part (7) is connected to the drive unit (6). The drive unit (6) is used to drive the transmission part (7) to move so as to drive the first vertical plate (3) to move through the lead screw (8).

4. The photoelectric switch electrical characteristic testing fixture according to claim 3, characterized in that, The drive unit (6) is a motor, and the transmission part (7) is one of a gear transmission assembly, a belt transmission assembly, and a chain transmission assembly.

5. The photoelectric switch electrical characteristic testing fixture according to claim 4, characterized in that, When the transmission part (7) is a gear transmission assembly, the transmission part (7) includes a first cylindrical gear (71) and a second cylindrical gear (72). The second cylindrical gear (72) is sleeved on the lead screw (8) and meshes with the first cylindrical gear (71). The first cylindrical gear (71) is connected to the driving end of the driving unit (6). The driving unit (6) is used to drive the first cylindrical gear (71) to rotate so as to drive the lead screw (8) to rotate synchronously through the second cylindrical gear (72).

6. The photoelectric switch electrical characteristic testing fixture according to claim 3, characterized in that, It also includes a control unit, which is connected to the drive unit (6).

7. The photoelectric switch electrical characteristic testing fixture according to claim 3, characterized in that, The end of the lead screw (8) near the drive unit (6) is connected to a first fixing block (9) via a first bearing, and the end of the lead screw (8) away from the drive unit (6) is connected to a second fixing block (10) via a second bearing.

8. The photoelectric switch electrical characteristic testing fixture according to claim 7, characterized in that, The first bearing has retaining rings at both ends in the axial direction.

9. The photoelectric switch electrical characteristic testing fixture according to claim 1, characterized in that, A first adsorption unit (11) is provided on the side of the first vertical plate (3) away from the second vertical plate (4). The first adsorption unit (11) is used to adsorb the first clamping plate (12). The first clamping plate (12) is used to fix the photoelectric switch transmitter (15). The second vertical plate (4) is provided with a second adsorption unit (13) on the side opposite to the first vertical plate (3). The second adsorption unit (13) is used to adsorb the second clamping plate (14). The second clamping plate (14) is used to fix the photoelectric switch receiving end (16).

10. The photoelectric switch electrical characteristic testing fixture according to claim 1, characterized in that, At least one side of the dark box (2) is open.

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