A platform door closed-loop motor encoder test tool

Abstract

The utility model discloses a kind of station door closed loop motor encoder test tool, including test platform, load simulation unit, control detection unit and interface adaptation module, the test platform includes a substrate, the load simulation unit includes magnetic-powder brake and the brake controller for controlling this magnetic-powder brake, the input end of the magnetic-powder brake is used to be coaxially connected with the output shaft of the motor to be measured by shaft coupling, the control detection unit includes programmable controller and motor driver.The utility model realizes the field fast test of station door motor by improvement, without disassembly, accurately simulate real load by magnetic-powder brake, combined with closed loop control system synchronous drive and detection, can comprehensively evaluate the dynamic performance of motor and encoder under simulated working condition;Modular interface and adjustable support make it can adapt to multiple motor models, integrated portable design cooperates data recording function, improve maintenance efficiency, test accuracy and equipment versatility.

Description

Technical Field

[0001] This utility model belongs to the technical field of platform screen door equipment, specifically relating to a testing fixture for a closed-loop motor encoder of a platform screen door. Background Technology

[0002] Platform screen door systems are critical equipment for ensuring passenger safety at subway, high-speed rail, and other rail transit stations. Their drive units typically use servo motors or DC motors with encoders. The encoders provide real-time feedback on motor speed and door position, enabling precise closed-loop control. Regular performance testing of the motor and encoder is necessary during routine maintenance and troubleshooting to ensure proper operation.

[0003] Currently, the common testing method involves removing the motor from the platform screen door mechanism and taking it to a laboratory or using a bulky general-purpose testing platform for testing. This method has the following significant drawbacks: Inefficient: The process of disassembling and installing the motor is cumbersome and consumes a lot of manpower and time.

[0004] The test environment is out of touch with reality: In a laboratory environment, it is difficult to simulate the load conditions when the motor actually drives the door leaf, and the test results may deviate from the actual working conditions on site.

[0005] Poor versatility: Different models of platform screen doors may use motors with different interfaces and installation dimensions. Universal testing platforms often require complex adaptation and setup, resulting in poor portability.

[0006] Unable to perform closed-loop testing: Simple power-on testing cannot verify whether the closed-loop logic between encoder feedback and control commands is correct.

[0007] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a testing fixture for the closed-loop motor encoder of a platform door.

[0008] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0009] The purpose of this utility model is to provide a testing fixture for closed-loop motor encoders of platform doors, which can solve the problems of existing testing methods being unable to perform on-site load closed-loop testing, having low efficiency, and poor versatility.

[0010] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows: A testing fixture for a closed-loop motor encoder of a platform door includes a test platform, a load simulation unit, a control and detection unit, and an interface adapter module. The test platform includes a base plate. The load simulation unit includes a magnetic powder brake and a brake controller for controlling the magnetic powder brake. The input end of the magnetic powder brake is coaxially connected to the output shaft of the motor under test via a coupling. The control and detection unit includes a programmable controller, a motor driver, and a human-machine interface. The programmable controller is communicatively connected to the motor driver, the brake controller, and the human-machine interface. The power output end of the motor driver is connected to the power input end of the motor under test via the interface adapter module. The encoder signal output end of the motor under test is connected to the feedback signal input end of the programmable controller via the interface adapter module.

[0011] In one or more embodiments of this utility model, a motor mounting bracket for fixing the motor under test is provided on the substrate. The mounting position of the motor mounting bracket on the substrate is adjustable to accommodate motors under test with different mounting sizes.

[0012] In one or more embodiments of this utility model, the substrate has a strip hole or an array of threaded mounting holes, and the motor mounting bracket is adjusted and fixed in position by bolts engaging with the strip hole or threaded mounting holes.

[0013] In one or more embodiments of the present invention, the load simulation unit further includes a torque sensor, which is connected in series between the coupling and the input shaft of the magnetic powder brake, and the signal output terminal of the torque sensor is communicatively connected to the programmable controller.

[0014] In one or more embodiments of this utility model, the input shafts of the coupling, torque sensor and magnetic powder brake are made coaxial by means of rigid connection or key connection.

[0015] In one or more embodiments of this utility model, the human-machine interface is a touch screen, which is integrated and installed at one end or side of the substrate; the control and detection unit further includes a data storage module connected to the programmable controller for storing test parameters and test result data.

[0016] In one or more embodiments of this utility model, the programmable controller and the brake controller and / or the human-machine interface exchange data via industrial Ethernet, PROFIBUS-DP or RS485 communication protocols.

[0017] In one or more embodiments of this utility model, the interface adapter module (11) includes a variety of quick-plug motor power interface adapters and encoder signal interface adapters; the motor power interface adapters and encoder signal interface adapters are provided with foolproof structures and mechanical locking devices.

[0018] Compared with existing technologies, this utility model improves the on-site rapid testing of platform screen door motors without disassembly. It accurately simulates real loads through magnetic powder brakes and combines closed-loop control system for synchronous drive and detection, which can comprehensively evaluate the dynamic performance of motors and encoders under simulated working conditions. The modular interface and adjustable bracket make it compatible with various motor models. The integrated portable design, combined with data recording function, improves maintenance efficiency, testing accuracy and equipment versatility. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a platform door closed-loop motor encoder testing fixture in one embodiment of the present invention; Figure 2 This is a perspective view of a platform door closed-loop motor encoder testing fixture according to one embodiment of the present invention; Figure 3 This is an electrical principle block diagram of a platform door closed-loop motor encoder testing fixture in one embodiment of the present invention.

[0021] Explanation of key figure labels: 1-Baseboard, 2-Motor under test, 3-Coupling, 4-Magnetic powder brake, 5-Torque sensor, 6-Motor mounting bracket, 7-Brake controller, 8-Programmable controller, 9-Motor driver, 10-Human machine interface, 11-Interface adapter module, 12-Data storage module. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0023] like Figures 1-3 As shown, a platform door closed-loop motor encoder testing fixture according to one embodiment of this utility model includes a test platform, a load simulation unit, a control and detection unit, and an interface adapter module. The test platform includes a base plate 1. The load simulation unit includes a magnetic powder brake 4 and a brake controller 7 for controlling the magnetic powder brake 4. The input end of the magnetic powder brake 4 is coaxially connected to the output shaft of the motor under test 2 through a coupling 3. The control and detection unit includes a programmable controller 8, a motor driver 9, and a human-machine interface 10. The programmable controller 8 is communicatively connected to the motor driver 9, the brake controller 7, and the human-machine interface 10. The power output end of the motor driver 9 is connected to the power input end of the motor under test 2 through the interface adapter module 11. The encoder signal output end of the motor under test 2 is connected to the feedback signal input end of the programmable controller 8 through the interface adapter module 11.

[0024] The working principle of this test fixture is as follows: the programmable controller 8 in the control detection unit issues control commands to drive the motor driver 9 to make the motor under test 2 run; at the same time, the programmable controller 8 instructs the brake controller 7 in the load simulation unit to control the magnetic powder brake 4 to apply an adjustable simulated load torque to the output shaft of the motor under test 2; under this load condition, the real-time feedback signal generated by the encoder at the tail of the motor under test 2 is transmitted back to the programmable controller 8 through the interface adapter module 11; finally, the programmable controller 8 compares the control commands it issues with the received encoder feedback signals to complete the closed-loop performance test and evaluation of the motor under test 2 and its encoder under simulated real working conditions.

[0025] like Figure 1 and Figure 2 As shown, a motor mounting bracket 6 for fixing the motor under test 2 is provided on the base plate 1. The mounting position of the motor mounting bracket 6 on the base plate 1 is adjustable to accommodate motors under test 2 with different mounting sizes. This allows the fixture to flexibly adapt to and firmly fix motors under test 2 with different mounting flange sizes and shaft extension lengths, greatly improving the versatility and applicability of the test fixture.

[0026] Specifically, the substrate 1 has strip holes or an array of threaded mounting holes. The motor mounting bracket 6 is adjusted and fixed in position by bolts engaging with the strip holes or threaded mounting holes, ensuring the stability of the mechanical connection during testing.

[0027] like Figure 2 and Figure 3As shown, the load simulation unit also includes a torque sensor 5, which is connected in series between the coupling 3 and the input shaft of the magnetic powder brake 4. The signal output terminal of the torque sensor 5 is communicatively connected to the programmable controller 8. The torque sensor 5 can directly and accurately measure the actual torque value of the motor output shaft, providing crucial real data for performance evaluation, thus making the load simulation more accurate and the test results more reliable than estimating torque solely through motor current.

[0028] like Figure 1 and Figure 2 As shown, the input shafts of coupling 3, torque sensor 5 and magnetic powder brake 4 are connected by rigid or key connections to ensure coaxiality, which effectively reduces vibration and measurement errors caused by misalignment, and also extends the service life of related mechanical components.

[0029] like Figure 3 As shown, the human-machine interface 10 is a touch screen, which is integrated and installed on one end or side of the substrate 1; the control and detection unit also includes a data storage module 12 connected to the programmable controller 8, which is used to store test parameters and test result data, realizes the recording and traceability of test parameters and result data, and provides data support for subsequent performance analysis, fault diagnosis and historical query.

[0030] Preferably, the programmable controller 8 communicates with the brake controller 7 and / or the human-machine interface 10 via industrial Ethernet, PROFIBUS-DP or RS485 communication protocols, ensuring high speed, stability and reliability of data interaction within the control unit and between components, conforming to industrial application standards and enhancing the system's anti-interference capability.

[0031] Preferably, the interface adapter module 11 includes various quick-plug motor power interface adapters and encoder signal interface adapters; the motor power interface adapters and encoder signal interface adapters are equipped with foolproof structures and mechanical locking devices. The modular quick-plug interface adapters, combined with the foolproof and mechanical locking designs, enable quick, accurate, and reliable connections with different motor models, improving testing efficiency and effectively preventing equipment damage or test failures due to mis-plugging or poor contact.

[0032] In use, firstly, select the appropriate interface adapter module 11 according to the model of the motor 2 under test and install it on the adjustable bracket 6. Connect it to the magnetic powder brake 4 through the coupling 3 to form a mechanical transmission chain. Next, after turning on the power, set the test parameters through the human-machine interface 10. At this time, the programmable controller 8 will synchronously control the motor driver 9 to output the drive signal, and at the same time instruct the brake controller 7 to apply a simulated load. During the test, the real-time feedback signal of the motor encoder and the detection data of the torque sensor 5 are continuously collected and transmitted back to the programmable controller 8, which will complete the comparison and analysis of the command value and the feedback value. Finally, the test results are displayed through the human-machine interface 10 and stored in the data storage module 12, thereby realizing the closed-loop performance verification of the platform door motor encoder system under simulated real working conditions.

[0033] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A testing fixture for a closed-loop motor encoder of a platform door, characterized in that, include: Test platform, load simulation unit, control and detection unit, and interface adaptation module; The test platform includes a substrate; The load simulation unit includes a magnetic powder brake and a brake controller for controlling the magnetic powder brake. The input end of the magnetic powder brake is used to be coaxially connected to the output shaft of the motor under test via a coupling. The control and detection unit includes a programmable controller, a motor driver, and a human-machine interface; the programmable controller is communicatively connected to the motor driver, the brake controller, and the human-machine interface; the power output terminal of the motor driver is connected to the power input terminal of the motor under test through the interface adapter module; the encoder signal output terminal of the motor under test is connected to the feedback signal input terminal of the programmable controller through the interface adapter module.

2. The platform door closed-loop motor encoder testing fixture according to claim 1, characterized in that, The substrate is provided with a motor mounting bracket for fixing the motor under test. The mounting position of the motor mounting bracket on the substrate is adjustable to accommodate motors under test with different mounting sizes.

3. The platform door closed-loop motor encoder testing fixture according to claim 2, characterized in that, The substrate has strip holes or an array of threaded mounting holes, and the motor mounting bracket is adjusted and fixed in position by bolts engaging with the strip holes or threaded mounting holes.

4. The platform door closed-loop motor encoder testing fixture according to claim 1, characterized in that, The load simulation unit also includes a torque sensor, which is connected in series between the coupling and the input shaft of the magnetic powder brake, and the signal output terminal of the torque sensor is communicatively connected to the programmable controller.

5. The platform door closed-loop motor encoder testing fixture according to claim 4, characterized in that, The input shafts of the coupling, torque sensor, and magnetic powder brake are ensured to be coaxial through rigid or keyed connections.

6. The platform door closed-loop motor encoder testing fixture according to claim 1, characterized in that, The human-machine interface is a touch screen, which is integrated and installed at one end or side of the substrate; the control and detection unit also includes a data storage module connected to the programmable controller for storing test parameters and test result data.

7. The platform door closed-loop motor encoder testing fixture according to claim 1, characterized in that, The programmable controller interacts with the brake controller and / or the human-machine interface via industrial Ethernet, PROFIBUS-DP or RS485 communication protocols.

8. The platform door closed-loop motor encoder testing fixture according to claim 1, characterized in that, The interface adapter module includes various quick-plug motor power interface adapters and encoder signal interface adapters; the motor power interface adapters and encoder signal interface adapters are equipped with foolproof structures and mechanical locking devices.

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