Automatic detection equipment for laser distance measuring sensor

Abstract

The utility model provides automatic detection equipment for a laser distance measuring sensor, and belongs to the technical field of laser detection equipment, the automatic detection equipment specifically comprises a test assembly and a shielding assembly, the test assembly comprises a rotary test motor, and the driving end of the rotary test motor is vertically arranged upwards; the test shell is a cylindrical hollow shell, two rows of test holes are uniformly formed in the side wall of the test shell at intervals, and the bottom surface of the test shell is fixedly connected with the driving end of the rotary test motor; the distance measuring track is arranged along any radius extension line of the bottom edge of the testing shell, and distance scales are marked on the distance measuring track; the light reflecting plate is connected to the distance measuring track in a sliding manner; the shielding assembly is used for shielding an optical signal emitted by a sensor to be tested in the test shell. Through the processing scheme provided by the invention, the automation degree is improved.

Description

Technical Field

[0001] This application relates to the field of laser detection equipment, and in particular to an automatic detection device for laser rangefinder sensors. Background Technology

[0002] With social progress and technological development, the measurement accuracy and response time of various electronic sensors are getting higher and higher. At present, it is impossible to accurately detect this measurement accuracy and response time manually. It is impossible to determine whether the sensor is qualified before it leaves the factory. Some of them are only theoretical data.

[0003] Existing technologies suffer from low levels of automation and large errors in data obtained through manual simulation testing. Utility Model Content

[0004] In view of this, this application provides an automatic detection device for laser rangefinder sensors, which solves the problems in the prior art, improves the degree of automation, and reduces the error of monitoring data.

[0005] The automatic detection device for laser rangefinder sensors provided in this application adopts the following technical solution:

[0006] An automatic detection device for laser rangefinder sensors includes a testing component and an occlusion component, wherein the testing component includes,

[0007] A rotary test motor, wherein the drive end of the rotary test motor is vertically upward;

[0008] The test shell is a cylindrical hollow shell with two rows of test holes evenly spaced on its side wall, and the bottom surface of the test shell is fixedly connected to the drive end of the rotary test motor.

[0009] A ranging track is provided, which is set along an extension line of any radius along the bottom edge of the test shell, and the ranging track is marked with distance scale.

[0010] A reflector, which is slidably connected to the ranging track;

[0011] The blocking component is used to block the light signal emitted by the sensor under test inside the test housing for a preset time.

[0012] Optionally, the test components also include,

[0013] A connecting base is provided at the drive end of the rotary test motor, and the test housing is connected to the rotary test motor through the connecting base;

[0014] The limiting component includes a limiting cylinder and a limiting latching piece. The limiting cylinder is located on one side of the connecting seat, and the limiting latching piece is located on the driving end of the limiting cylinder. The limiting latching piece is used to prevent the connecting seat from rotating.

[0015] Optionally, the test components also include,

[0016] A workpiece switching motor is used to switch the sensor under test.

[0017] The test bench has the drive end of the workpiece switching motor rotatably connected to the center of the test bench, the rotary test motor rotatably connected to the bottom of both ends of the test bench, the drive end of the rotary test motor extending through the test bench to the top of the test bench, the connecting seat located above the test bench, and the limiting member disposed on the test bench.

[0018] Optionally, the shading component includes,

[0019] A shielding shell is disposed on the top of the test shell near the side of the ranging track;

[0020] A shutter assembly, comprising a dual shutter and a single shutter, both of which are disposed on the shielding shell to shield a lower row of test holes. The dual shutter and the single shutter are respectively disposed on both sides of the shielding shell.

[0021] Optionally, the shading component further includes,

[0022] The support includes columns and fixing plates. There are multiple columns, which are respectively erected at the four corners of a square. The top of each column is provided with a fixing plate, and a support plate is provided below the fixing plate. The support plate is slidably connected to the column.

[0023] A lifting cylinder is located on the top of the fixed plate, and its driving end passes through the fixed plate and points towards the receiving plate. The driving end of the lifting cylinder is fixedly connected to the receiving plate.

[0024] A shutter switching motor is mounted on the receiving plate, located above the shielding shell, and the shielding shell is fixedly connected to the drive end of the shutter switching motor.

[0025] Optionally, the limiting latch has an arc-shaped notch on the side near the connecting seat.

[0026] Optionally, the workpiece switching motor is fitted with a fixing shell, which is used to fix the position of the workpiece switching motor.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] The laser rangefinder sensor consists of a transmitter and a receiver. The laser emitted by the transmitter is reflected by a reflector and received by the receiver. When the shutter is opened, the transmitter emits light that illuminates the reflector, and the receiver receives the reflected light and outputs a signal. The distance between the reflector and the laser rangefinder sensor is calculated based on the time difference between the emission and reception times. The calculated distance is then compared to the actual distance to the reflector; if they match, the laser sensor is functioning correctly. More importantly, this application controls the duration of light emission by controlling the shutter opening time. The calculated distance is then obtained based on the time difference between the emission and reception times. If the calculated distance matches the actual distance, the laser rangefinder sensor's response time is less than or equal to the shutter opening time. By adjusting the shutter opening time according to the laser rangefinder sensor's design requirements, the response speed of the laser rangefinder sensor is judged to be within acceptable limits. This achieves automated testing of sensor performance parameters, saving manpower and improving efficiency.

[0029] The reflectivity of the two sides of the reflector is different. By switching the front and back of the reflector, the performance of the sensor when detecting different objects can be simulated. The reflector can move back and forth automatically to simulate the performance of the sensor when detecting objects at different distances. The automated equipment has good test consistency. There is no human intervention in the test process, which ensures the accuracy of the test results. The test speed is fast, which improves product quality and production capacity. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional structural diagram of an automatic detection device for a laser rangefinder sensor disclosed in an embodiment of this application;

[0032] Figure 2 This is a partial three-dimensional schematic diagram of an automatic detection device for a laser rangefinder sensor disclosed in an embodiment of this application;

[0033] Figure 3 This is a three-dimensional structural schematic diagram from another perspective of an automatic detection device for a laser rangefinder sensor disclosed in an embodiment of this application;

[0034] Figure 4 This is a back view schematic diagram of an automatic detection device for a laser rangefinder sensor disclosed in an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Test component; 11. Rotary test motor; 12. Test housing; 13. Distance measuring track; 14. Reflector; 15. Connecting seat; 16. Limiting component; 161. Limiting cylinder; 162. Limiting latch; 17. Workpiece switching motor; 18. Test platform; 2. Shielding component; 21. Shielding housing; 22. Shutter switching motor; 23. Support component; 231. Column; 232. Fixing plate; 24. Shutter component; 241. Dual shutter; 242. Single shutter; 25. Receiving plate; 26. Lifting cylinder. Detailed Implementation

[0036] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0041] This application provides an automatic detection device for laser rangefinder sensors, referring to... Figure 1-4 It includes a test component 1 and a shielding component 2. The test component 1 is mounted on a mounting platform and includes...

[0042] The workpiece switching motor 17 has its drive end pointing vertically upward and is fixed to the upper surface of the mounting platform by bolts. A fixing shell is welded onto the workpiece switching motor 17 to protect the stability of the workpiece switching motor 17 during operation.

[0043] The test platform 18 is long and narrow. The center of the test platform 18 is fixedly connected to the drive end of the workpiece switching motor 17. The workpiece switching motor 17 drives the test platform 18 to rotate.

[0044] A rotary test motor 11 is symmetrically installed at both ends of the test bench 18, with the rotary test motor 11 located below the test bench 18. The drive end of the rotary test motor 11 passes through the test bench 18 and extends above the test bench 18. The rotary test motor 11 is installed on the test bench 18 by bolts, and a connecting seat 15 is welded to the drive end of the rotary test motor 11.

[0045] Test housing 12 is a cylindrical hollow shell with two rows of test holes evenly spaced on its side wall. Each row of test holes is evenly distributed around the circumference of test housing 12, and the two rows of test holes are aligned vertically. The test housing 12 is used to install the laser sensor to be tested. The receiving end of the laser rangefinder sensor is aligned with one of the test holes in the upper row, and the transmitting end of the laser rangefinder sensor is aligned with one of the test holes in the lower row. The bottom surface of test housing 12 is fixedly connected to the connecting seat 15 by bolts.

[0046] The workpiece switching motor 17 controls the rotation of the test platform 18 to change the test position, so that while one end of the test platform 18 is testing, the other end can be loaded and unloaded with the sensor to be tested, thereby improving the testing efficiency. The rotary motor can control the test shell 12 to rotate, so that the test shell 12 at one station can perform testing of multiple sets of sensors, further improving efficiency.

[0047] Reference Figure 3The limiting component 16 is symmetrically installed on the test bench 18 and located between the two test shells 12. The limiting component 16 includes a limiting cylinder 161 and a limiting snap-fit ​​piece 162. The driving end of the limiting cylinder 161 points to the connecting seat 15. The limiting snap-fit ​​piece 162 is welded to the driving end of the limiting cylinder 161. The end of the limiting snap-fit ​​piece 162 near the connecting seat 15 has an arc-shaped notch. The arc-shaped notch is used to snap the cylindrical part of the connecting seat 15 to prevent the connecting seat 15 from rotating.

[0048] When the sensor installed in the test housing 12 is performing detection, the limit cylinder 161 controls the limit latch 162 to approach the connecting seat 15. The arc-shaped notch on the limit latch 162 is engaged with the connecting rod position of the connecting seat 15 to prevent the connecting seat 15 from rotating, thus ensuring stability during the test.

[0049] Reference Figure 1 The distance measuring track 13 is parallel to the length direction of the initial test position of the test platform 18, and the starting end of the distance measuring track 13 and the end of the test platform 18 are on the same vertical plane. A ball screw is rotatably installed inside the distance measuring track 13, and a drive motor is installed at one end of the distance measuring track 13. The drive motor is used to drive the screw of the ball screw to rotate.

[0050] Reflector 14 is slidably connected to the ranging track 13 via a sliding seat. The sliding seat is fixedly connected to the nut of the ball screw. The reflector 14 is fixed to the sliding seat by bolts. A rotary motor is also installed on the sliding seat by bolts. The drive end of the rotary motor is rotatably connected to the reflector 14. The reflectivity of the two sides of the reflector 14 is different.

[0051] The reflector 14 can be set to test the distance according to the test range of the sensor under test, and can further test the sensor's sensing speed under different reflectivity, thereby expanding the sensor's detection range.

[0052] The shielding component 2 includes,

[0053] Reference Figure 3 Support component 23 includes columns 231 and fixing plate 232. There are four columns 231, which are respectively erected on the mounting platform and located at the four corners of the rectangle. The fixing plate 232 is installed on the top of the columns 231 by bolts. The test platform 18 is located directly below the fixing plate 232.

[0054] The receiving plate 25 is located between the fixed plate 232 and the test table 18, and the receiving plate 25 is slidably connected to the column 231.

[0055] Referring to 2-4, the lifting cylinder 26 is fixed to the top of the fixing plate 232 by bolts, and its driving end is welded vertically downward to the receiving plate 25.

[0056] The shutter switching motor 22 is bolted to the top of the receiving plate 25, located above the test housing 12. The drive end of the shutter switching motor 22 passes through the receiving plate 25 and points vertically downwards towards the test housing 12.

[0057] The shielding shell 21 is bolted to the drive end of the shutter switching motor 22 and is used to cover the outer periphery of the test shell 12. The shielding shell 21 is made of a lightweight metal shell with a black polyurethane foam inside. The black polyurethane foam has good light absorption properties and will not scratch the product.

[0058] The shutter assembly 24 includes a dual shutter 241 and a single shutter 242, which are welded to both sides of the shielding housing 21. Both the dual shutter 241 and the single shutter 242 utilize the high-speed shutter of a DSLR camera for light blocking, achieving shutter speeds up to 1 / 8th of a second, meeting the requirements for rapid sensor response testing. The shutter assembly 24 is used to block the lower row of test holes; that is, when the shutter assembly 24 is closed, it blocks the emitting end of the laser rangefinder sensor. By setting the shutter opening time, the laser rangefinder sensor is not blocked outside a preset time; when the shutter is open and closed, the laser rangefinder sensor is blocked within the preset time.

[0059] A laser rangefinder sensor consists of a transmitter and a receiver. The laser emitted by the transmitter is reflected by a reflector and then received by the receiver. When the shutter is opened, the transmitter emits light that shines on the reflector, and the receiver receives the reflected light and outputs a signal. Based on the time difference between the emission and reception times, the distance between the reflector and the laser rangefinder sensor is calculated as the calculated distance. It is then determined whether the calculated distance matches the actual distance to the reflector. If they match, it indicates that the laser sensor is functioning correctly.

[0060] More importantly, this application controls the duration of light emission from the transmitter by controlling the shutter opening time, and then calculates the distance based on the time difference between the emission and reception times. If the calculated distances are consistent, it indicates that the response time of the laser rangefinder is less than or equal to the shutter opening time. The shutter opening time is adjusted according to the design requirements of the laser rangefinder's response speed to determine whether the response speed of the laser rangefinder is qualified. Specifically, because the emission time is short, if the response speed of the laser rangefinder is slow and the response time is long, even if the reflected light reaches the receiver, the slow response speed of the laser rangefinder will cause the receiver to fail to recognize the reflected light and cannot output a signal indicating that the reflected light has been received, thus failing to complete the distance measurement.

[0061] The dual shutter 241 and single shutter 242 settings allow the sensor under test to be tested not only individually, but also in comparison between two sets, thus enriching the testing methods and enabling a more effective and comprehensive comparison to identify faulty sensors.

[0062] When testing a sensor, first install the sensor under test in the test housing 12. Then, adjust the position of the reflector 14 on the ranging track 13 and the reflectivity of the reflective surface according to the parameters. Once everything is adjusted appropriately, control the lifting cylinder 26 to place the blocking shell 21 onto the test housing 12, blocking the shutter at the emission point of the sensor under test. By controlling the opening and closing of the shutter and setting the shutter opening time, when the shutter is open, the light signal from the sensor under test is transmitted to the reflector 14, refracted by the reflector 14, and returned to the receiving end of the sensor. If two sets of sensors under test need to be tested simultaneously, control the rotating test motor 11 to rotate the two test motors to the side closer to the reflector 14, and simultaneously switch the shutter to a dual shutter 241 via the shutter switching motor 22, thus allowing simultaneous testing of two sets of sensors under test.

[0063] After the sensor under test in one test housing 12 has been tested, the lifting cylinder 26 is controlled to raise the shield housing 21, and then the workpiece switching motor 17 is controlled to rotate the test housing 12 at the other end of the test platform 18 to the end closer to the measuring track 13.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A laser range finder sensor automatic detection apparatus, characterized by, Including test assembly (1) and shielding assembly (2), wherein, test assembly (1) includes, Rotary test motor (11), the driving end of the rotary test motor (11) is vertically upwardly arranged; Test shell (12), the test shell (12) is cylindrical inside empty shell, two rows of test holes are uniformly arranged on the side wall of test shell (12), and the bottom surface of test shell (12) is fixedly connected with the driving end of rotary test motor (11); Distance track (13), the distance track (13) is arranged along the arbitrary radius extension line of the bottom edge of the test shell (12), and the distance track (13) is marked with distance scale; Reflective plate (14), the reflective plate (14) is slidingly connected on the distance track (13); The shielding assembly (2) is used to shield the light signal emitted by the sensor to be tested in the test shell (12) within a preset time.

2. The automatic detection equipment for laser ranging sensor according to claim 1, characterized in that, The test assembly (1) further includes, Connecting seat (15), the connecting seat (15) is arranged on the driving end of the rotary test motor (11), and the test shell (12) is connected on the rotary test motor (11) through the connecting seat (15); Limiting piece (16), limiting piece (16) includes limiting cylinder (161) and limiting clamping piece (162), the limiting cylinder (161) is arranged on one side of the connecting seat (15), the limiting clamping piece (162) is arranged on the driving end of the limiting cylinder (161), and the limiting clamping piece (162) is used to prevent the connecting seat (15) from rotating.

3. The automatic detection device for laser ranging sensor according to claim 2, characterized in that, The test assembly (1) further includes, Workpiece switching motor (17), the workpiece switching motor (17) is used to switch the sensor to be tested; Test table (18), the driving end of the workpiece switching motor (17) is rotatably connected at the center of the test table (18), the rotary test motor (11) is rotatably connected at the bottom of both ends of the test table (18), and the driving end penetrates through the test table (18) and extends to above the test table (18), the connecting seat (15) is located above the test table (18), and the limiting piece (16) is arranged on the test table (18).

4. The automatic detection device for laser ranging sensor according to claim 3, characterized in that, The shielding assembly (2) includes, Shielding shell (21), the shielding shell (21) is arranged on the top of the test shell (12) close to one side of the distance track (13); Shutter piece (24), the shutter piece (24) includes double shutter (241) and single shutter (242), the double shutter (241) and the single shutter (242) are arranged on the shielding shell (21) and are used to shield the lower row of test holes, and the double shutter (241) and the single shutter (242) are arranged on two sides of the shielding shell (21) respectively.

5. The automatic detection device for laser ranging sensor according to claim 4, characterized in that, The shielding assembly (2) further includes, Support (23), the support (23) includes column (231) and fixed plate (232), the column (231) has multiple, multiple column (231) is respectively erected at square four corners, the column (231) top is equipped with fixed plate (232), is equipped with the receiving plate (25) below fixed plate (232), the receiving plate (25) sliding connection is established in the column (231); Lifting cylinder (26), the lifting cylinder (26) is equipped on the top of the fixed plate (232), and its drive end passes through the fixed plate (232) and points to the receiving plate (25), and the drive end of the lifting cylinder (26) and the receiving plate (25) are fixedly connected; Shutter switching motor (22), the shutter switching motor (22) is equipped on the receiving plate (25), is located above the shielding shell (21), and the shielding shell (21) is fixedly connected with the drive end of the shutter switching motor (22).

6. The automatic detection equipment for laser ranging sensor according to claim 2, characterized in that, The side close to the connecting seat (15) of the limiting clamping piece (162) is provided with an arc-shaped notch.

7. The automatic detection equipment for laser ranging sensor according to claim 3, characterized in that, The workpiece switching motor (17) is externally sleeved with a fixed shell for fixing the position of the workpiece switching motor (17).

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