Mechanical position sensor performance test bench
By designing a mechanical position sensor performance test bench, using a motor to drive the cam disk to rotate and impact the sensor head, combined with a photoelectric sensor and an encoder, the accurate acquisition and recording of sensor signals and working angles is achieved, and the detection accuracy in the prior art is solved The problem of insufficient meets the testing requirements of high-quality products.
Patent Information
- Application Number
- CN202421274915.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The prior art is difficult to accurately detect the signal acquisition accuracy and triggering life of mechanical position sensors, especially in heavy load and periodic tests, which cannot meet the batch inspection requirements of high-quality products.
A mechanical position sensor performance test bench was designed, including a sensor mount, a cam disk mount, a counting acquisition device, an angle acquisition device and a control box. The cam disk rotates and impacts the sensor head through a motor to collect and record sensor switches. Signal and working angle, data acquisition and comparison are performed using photoelectric sensors, encoders and programmable controllers.
The accuracy detection of sensor heavy load and periodic load tests is realized, ensuring the accuracy of the number of sensor signal triggers and the working angle recording, and meeting the detection requirements of high-quality products.
Smart Images
Figure CN222353237U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sensor detection equipment, in particular to a mechanical position sensor performance test bench. Background Art
[0002] Mechanical position sensors use input pressure to contact the elastic element of the pressure switch to form elastic deformation to obtain signals. This device is widely used in automatic detection and automatic control technology. The accuracy of sensor signal acquisition and the trigger life are important performance parameters of the device. For example, the sensor heavy load test requires: the speed of the cam hitting the sensor head must be greater than 4.8 meters per second, the frequency must be greater than 15,000 times per hour, and the sensor switch signal must be sampled for a total of greater than or equal to 5,000 times; the sensor periodic test requires: the speed of the cam hitting the sensor head must be 2.8 meters per second, the frequency must be greater than 12,000 times per hour, and the sensor switch signal must be sampled for a total of greater than or equal to 100,000 times; and the accuracy of the sensor working angle record and the number of sensor switch signal triggers must be tested for product qualification to ensure the high quality requirements of batch products. Utility Model Content
[0003] In view of the problems existing in the prior art, the utility model provides a mechanical position sensor performance test bench, which can carry out heavy load test and periodic load test of the sensor, collect the number of times the sensor switch signal is triggered and the number of cam disk rotations for accuracy comparison, and record the working angle of the sensor.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] The mechanical position sensor performance test bench includes a sensor mounting frame on a machine table top, a cam plate mounting frame on one side of the sensor mounting frame, a cam plate mounted on the cam plate being driven and connected to a motor under the machine table top, a sensor head of a convex part of the cam plate touching a pressure sensor during rotation, and also includes a counting and collecting device for collecting the amount of rotation of the cam plate, an angle collecting device on the other side of the sensor mounting frame, and the motor, sensor, counting and collecting device, and angle collecting device are connected to the signal of a programmable controller in a control box arranged on the machine table top.
[0006] A further improvement scheme is that the angle acquisition device includes a fixed frame, a synchronous wheel A, a synchronous wheel B, a synchronous belt, and an angle encoder that rotate coaxially with the sensor shaft. The fixed frame is fixed to the axis of the synchronous wheel A, the synchronous wheel A and the synchronous wheel B are linked by a synchronous belt, the axis of the synchronous wheel B is connected to the angle encoder, and the angle encoder is connected to the programmable controller signal.
[0007] A further improvement is that the fixing frame is a "7"-shaped connecting plate with a connecting shaft on the upper surface fixed to the axis of the synchronous wheel A, and a side hole on the side for fixing to the sensor shaft with bolts.
[0008] A further improvement is that a tensioning wheel is provided on the counter top on the side of the angle acquisition device, and the tensioning wheel is connected to the synchronous belt.
[0009] A further improvement is that the tension wheel is arranged at one end of the cross bar, the other end of the cross bar is fixed to the column by bolts, and the bottom end of the column is fixed to the countertop of the machine. The position of the tension wheel can be adjusted by loosening and tightening the bolts.
[0010] A further improvement is that the counting and collecting device includes a cam plate with a convex block on the circumference of the rotating shaft, a photoelectric sensor is installed on the side, and the photoelectric sensor signal is connected to the programmable controller.
[0011] Another improvement is that the counting and collecting device is equipped with a revolution encoder on the output shaft of the motor, or the motor is a servo motor with a built-in encoder, and the revolution encoder or the encoder signal of the servo motor is connected to a programmable controller.
[0012] A further improvement is that the side of the sensor mounting frame is L-shaped, the opening on the vertical plate is connected to the hole on the sensor housing by bolts, and the horizontal plate is provided with a long hole, and the bolts are fastened in the long hole to fix the sensor mounting frame on the countertop. The bolts can be loosened to adjust the position of the sensor mounting frame to match the replacement of the large cam disc and the small cam disc for heavy load and periodic load tests.
[0013] A further improvement is that the control box is provided with a human-machine interactive touch screen, and the human-machine interactive touch screen is connected to the programmable controller signal.
[0014] A further improvement is that the motor is electrically connected to a frequency converter and then connected to a programmable controller signal. The motor speed is controlled by the frequency converter and displayed on a human-computer interactive touch screen. Beneficial Effects
[0015] This test bench is used for heavy load test and periodic load test of sensor. The motor drives the cam plate to rotate, and the convex part of the cam plate hits the sensor head of the sensor. The PLC collects the switch signal of the sensor and the counting and collecting device of the cam plate rotation volume records the number of times to compare and test the signal triggering accuracy of the sensor. At the same time, the angle collection device rotates coaxially with the sensor shaft to collect the working angle of the sensor and the maximum rotation angle of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model;
[0017] Figure 2 It is a schematic diagram of the sensor mounting frame, angle acquisition device and sensor connection;
[0018] Figure 3The top view of the sensor mounting bracket. DETAILED DESCRIPTION
[0019] like Figures 1 to 3 As shown, the utility model includes a sensor mounting frame 2, a cam disc mounting frame 3, a counting and collecting device 6, an angle collecting device 7 and a control box 8 are arranged on the countertop of a cabinet 1. The side of the sensor mounting frame 2 is L-shaped, and the opening on the vertical plate is connected to the hole on the housing of the sensor 5 by bolts. A long hole is arranged on the horizontal plate, and the bolts are fastened in the long hole to fix the sensor mounting frame 2 on the countertop of the cabinet 1. A cam disc mounting frame 3 is arranged on one side of the sensor mounting frame 2, and the cam disc 4 installed thereon is driven to connect the motor under the countertop of the cabinet (the cabinet door is closed and not shown in the figure), and the convex part of the cam disc 4 rotates to touch the sensor head of the pressure sensor 5. The counting and collecting device 6 for collecting the rotation amount of the cam disc is a convex block 61 on the circumference of the rotating shaft of the cam disc 4, and a photoelectric sensor 62 is installed on the side. An angle collecting device 7 is arranged on the other side of the sensor mounting frame, and the angle collecting device 7 includes a fixing frame 71, a synchronous wheel A 72, and a synchronous wheel B that rotate coaxially with the sensor shaft. 73, tensioning wheel 76, synchronous belt 74 and angle encoder 75, the fixed frame 71 is a "7" shaped connecting plate, the upper surface is provided with a connecting shaft and the axis of the synchronous wheel A 72 is fixed, the side is provided with a side hole and is fixed with the rotating shaft of the sensor 5 by bolts, the synchronous wheel A 72 and the synchronous wheel B 73 are linked by the synchronous belt 74, the axis of the synchronous wheel B 73 is connected to the angle encoder 75 on the upper gantry, the tensioning wheel 76 is close to the synchronous belt 74, the tensioning wheel 76 is arranged at one end of the cross bar, the other end of the cross bar is fixed to the column by bolts, and the bottom end of the column is fixed to the counter table. The sensor, photoelectric sensor, angle encoder are connected to the programmable controller (PLC) signal set in the control box, the motor is electrically connected to the frequency converter and then connected to the programmable controller signal. The control box 8 is provided with a human-machine interactive touch screen 81, which is connected to the programmable controller signal. The frequency converter controls the motor speed regulation, and the human-machine interactive touch screen can display the motor speed.
[0020] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. Mechanical position sensor performance test bench, characterized by: The invention comprises a cabinet (1) having a sensor mounting frame (2) on the table top, a cam plate mounting frame (3) on one side of which a cam plate (4) mounted thereon is driven and connected to a motor below the cabinet table top, a sensor head of a convex portion of the cam plate (4) touching a pressure sensor (5) during rotation, and a counting and collecting device (6) for collecting the amount of rotation of the cam plate. An angle collecting device (7) is arranged on the other side of the sensor mounting frame. The motor, the sensor, the counting and collecting device, and the angle collecting device are connected to a programmable controller signal in a control box (8) arranged on the cabinet table top.
2. The mechanical position sensor performance test bench according to claim 1 is characterized in that: The angle acquisition device (7) comprises a fixed frame (71) that rotates coaxially with the sensor shaft, a synchronous wheel A (72), a synchronous wheel B (73), a synchronous belt (74), and an angle encoder (75); the fixed frame (71) and the synchronous wheel A (72) are fixed at the axis; the synchronous wheel A (72) and the synchronous wheel B (73) are linked via the synchronous belt (74); the axis of the synchronous wheel B (73) is connected to the angle encoder (75); and the angle encoder (75) is connected to a programmable controller signal.
3. The mechanical position sensor performance test bench according to claim 2 is characterized in that: The fixing frame (71) is a "7"-shaped connecting plate, the upper surface of which is provided with a connecting shaft fixed to the axis of the synchronous wheel A (72), and the side surface is provided with a side hole fixed to the rotating shaft of the sensor (5) by bolts.
4. The mechanical position sensor performance test bench according to claim 2, characterized in that: A tensioning wheel (76) is provided on the machine cabinet surface on the side of the angle acquisition device (7), and the tensioning wheel (76) is in contact with the synchronous belt (74).
5. The mechanical position sensor performance test bench according to claim 4, characterized in that: The tension wheel (76) is arranged at one end of the crossbar, the other end of the crossbar is fixed to the column by bolts, and the bottom end of the column is fixed to the countertop of the machine cabinet.
6. The mechanical position sensor performance test bench according to claim 1, characterized in that: The counting and collecting device (6) comprises a cam plate (4) having a convex block (61) arranged on the peripheral surface of the rotating shaft, and a photoelectric sensor (62) installed on the side, wherein the signal of the photoelectric sensor (62) is connected to a programmable controller.
7. The mechanical position sensor performance test bench according to claim 1, characterized in that: The counting and collecting device (6) is a motor having a revolution encoder installed on its output shaft, or the motor is a servo motor with a built-in encoder, and the revolution encoder or the encoder signal of the servo motor is connected to a programmable controller.
8. The mechanical position sensor performance test bench according to claim 1, characterized in that: The side of the sensor mounting frame (2) is L-shaped, the opening on the vertical plate is connected to the hole on the sensor housing via bolts, and the horizontal plate is provided with a long hole, and the bolts are fastened in the long hole to fix the sensor mounting frame on the countertop.
9. The mechanical position sensor performance test bench according to claim 1, characterized in that: The control box (8) is provided with a human-machine interactive touch screen (81), which is connected to the programmable controller by signal.
10. The mechanical position sensor performance test bench according to claim 1, characterized in that: The motor is electrically connected to the frequency converter and then connected to the programmable controller signal.