Subway train quick-acting switch testing device

Abstract

The utility model discloses a subway train quick-acting switch testing device, which comprises a testing table, a touch display screen and a PLC module, and is characterized in that the testing table is provided with a contact action testing mechanism used for performing multiple contact action tests on a quick-acting switch; the resistance testing mechanism is used for testing the resistance value when the quick-action switch contact is closed; the touch display screen is used for receiving a test instruction issued by a user; and the PLC module is connected with the touch display screen, the contact action test mechanism and the resistance test mechanism respectively, and is used for acquiring a test instruction, forwarding the test instruction to the contact action test mechanism and the resistance test mechanism, and sending the acquired quick-action switch contact action times and the resistance value when the quick-action switch contact is closed to the touch display screen for display. According to the utility model, the performance and data indexes of the quick-action switch are automatically tested, manual operation is replaced by mechanical operation, the labor cost is reduced, and the test efficiency and the test quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit technical field, concretely relates to a subway train quick -acting switch testing arrangement. BACKGROUND

[0002] Along with the rapid development of guangzhou subway, the linear motor train that is put into operation increases exponentially, and the number of trains that are rolling into the frame overhaul also increases continuously. The quick-acting switch is the key component of the driver controller in the vehicle traction system, and during the frame overhaul, the quick-acting switch needs to be detected for 100 times before being installed on the vehicle, so as to ensure that its function and related measurement data meet the requirements of the frame overhaul regulations. However, the prior art lacks a testing device specially used for the quick-acting switch, and only manual frequent pressing of the quick-acting switch can be used to realize 100 times of detection of the quick-acting switch contact and combined with the detection of the resistance value when the contact is closed. This measurement method has large workload, uneven operation quality, low operation efficiency, and needs to be recorded once for each measurement, which consumes a long time in the testing process. In addition, if the quick-acting switch fails during the static adjustment of the vehicle, it needs to be re-removed and reworked for the above-mentioned manual inspection, which is time-consuming and labor-intensive, has very low testing efficiency, and has a great impact on vehicle maintenance and operation. SUMMARY

[0003] In order to overcome one or more of the above technical defects, the utility model provides a subway train quick-acting switch testing device, which realizes automatic testing of the performance and data index of the quick-acting switch, replaces manual operation with mechanical operation, reduces labor cost, and improves testing efficiency and testing quality.

[0004] In order to solve the above problems, the utility model is realized according to the following technical scheme:

[0005] A subway train quick-acting switch testing device, comprising a test table, a touch display screen and a PLC module, wherein the test table is provided with:

[0006] A contact action testing mechanism for testing the quick-acting switch for multiple contact actions;

[0007] A resistance testing mechanism for testing the resistance value when the quick-acting switch contact is closed;

[0008] The touch display screen is used for receiving the test instruction issued by the user;

[0009] The PLC module is connected with the touch display screen, the contact action testing mechanism and the resistance testing mechanism respectively, is used for obtaining the test instruction and forwarding to the contact action testing mechanism and the resistance testing mechanism, and sends the obtained quick-acting switch contact action times and the resistance value when the quick-acting switch contact is closed to the touch display screen for display.

[0010] Furthermore, the contact action testing mechanism includes a speed-regulating motor, a contact action testing frame, and a position sensor. The quick-action switch is placed on the contact action testing frame, which includes a rotating shaft and several protruding and concave plates arranged on the rotating shaft that contact the quick-action switch contacts.

[0011] The speed-regulating motor is connected to the PLC module, and the output shaft of the speed-regulating motor is connected to the rotating shaft to drive the rotating shaft to rotate.

[0012] The position sensor is mounted on the rotating shaft and connected to the PLC module to calculate the number of rotations of the rotating shaft.

[0013] Furthermore, the resistance testing mechanism includes a test frame, a moving unit, and test probes disposed on the moving unit. The test frame is provided with a slide rail, and the moving unit can move left and right along the slide rail.

[0014] Furthermore, the moving unit includes a slider that can move along a slide rail, a crimping handle, and a probe circuit board. One end of the crimping handle is fixed to the side of the slider away from the slide rail, and the other end is fixedly connected to the probe circuit board. The crimping handle is used to press the probe circuit board down until the test probe connects to the quick-action switch according to the operator's downward pressing action, or to raise the probe circuit board until the test probe separates from the quick-action switch according to the operator's upward pulling action. The probe circuit board is provided with a plurality of test probes for connecting to the quick-action switch, and the probe circuit board is connected to the PLC module.

[0015] Furthermore, the moving unit also includes a locking knob disposed on the crimping handle for locking the crimping handle.

[0016] Furthermore, the PLC module includes an MCU circuit and a filter circuit, a step-down circuit, an indicator light circuit, and an analog-to-digital converter circuit, which are respectively connected to the MCU circuit.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model discloses a subway train speed switch testing arrangement, including test board, touch display screen and PLC module, the test board is provided with contact action test mechanism and resistance test mechanism, and contact action test mechanism is used for multiple contact action test of speed switch, resistance test mechanism is used for testing the resistance value when speed switch contact closes, the touch display screen is used for receiving the test instruction of user's issue, the PLC module is connected with touch display screen, contact action test mechanism, resistance test mechanism respectively, is used for obtaining test instruction and forwarding contact action test mechanism, resistance test mechanism to speed switch contact action frequency and the resistance value when speed switch contact closes are sent to touch display screen and show, realize the automatic test of speed switch performance and data index, replace manual operation by mechanical operation, reduce manual cost, improve test efficiency and test quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific embodiment of the utility model is explained in further detail below in combination with the drawings, wherein:

[0020] Figure 1 The structure of subway train speed switch testing arrangement of example 1 Figure 1 ;

[0021] Figure 2 The structure of subway train speed switch testing arrangement of example 1 Figure 2 ;

[0022] Figure 3 The rotating shaft of subway train speed switch testing arrangement of example 1 and the concave and convex piece of setting on the rotating shaft

[0023] Figure 4 The circuit diagram of MCU circuit in the PLC module of subway train speed switch testing arrangement of example 1

[0024] Figure 5 The circuit diagram of 5V filter circuit in the PLC module of subway train speed switch testing arrangement of example 1

[0025] Figure 6 The circuit diagram of 24V-5V step-down circuit in the PLC module of subway train speed switch testing arrangement of example 1

[0026] Figure 7 The circuit diagram of analog-digital conversion circuit and current source in the PLC module of subway train speed switch testing arrangement of example 1

[0027] Figure 8 Touch display screen drive communication circuit of subway train speed switch testing arrangement of example 1

[0028] Labeling descriptions: 1. Test bench; 2. Touch screen; 3. Speed-regulating motor; 4. Rotating shaft; 5. Concave and convex plates; 6. Test frame; 7. Test probe; 8. Slide rail; 9. Slider; 10. Locking knob; 11. Probe circuit board;

[0029] 100. MCU circuit; 200. 5V filter circuit; 300. 24V-5V step-down circuit; 400. Indicator light circuit; 500. Analog-to-digital converter circuit; 510. Current source; 600. Touch screen driver communication circuit. Detailed Implementation

[0030] The preferred embodiments of the present invention will be 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 the present invention.

[0031] Example 1

[0032] This embodiment discloses a subway train speed switch testing device, such as... Figures 1-3 The system includes a test bench 1, a touch screen display 2, and a PLC module. The test bench 1 is equipped with a contact action testing mechanism and a resistance testing mechanism. The contact action testing mechanism is used to perform multiple contact action tests on the quick-action switch; the resistance testing mechanism is used to test the resistance value when the quick-action switch contacts are closed; the touch screen display is used to receive test commands issued by the user; the PLC module is connected to the touch screen display, the contact action testing mechanism, and the resistance testing mechanism respectively, and is used to obtain test commands and forward them to the contact action testing mechanism and the resistance testing mechanism, and send the obtained number of quick-action switch contact actions and the resistance value when the quick-action switch contacts are closed to the touch screen display for display.

[0033] In this embodiment, the contact action testing mechanism includes a speed-regulating motor 3, a contact action testing frame, and a position sensor (not shown in the figure). A quick-action switch is placed on the contact action testing frame, which includes a rotating shaft 4 and several protruding tabs 5 mounted on the rotating shaft that contact the quick-action switch contacts. The speed-regulating motor 3 is connected to a PLC module and receives and operates according to test commands from the touchscreen display 2. The output shaft of the speed-regulating motor 3 is connected to the rotating shaft 4 to drive the rotating shaft to rotate. The position sensor is mounted on the rotating shaft 4 and connected to the PLC module to calculate the number of rotations of the rotating shaft. When the speed-regulating motor 3 operates according to the test commands from the touchscreen display 2, it drives the rotating shaft 4 to rotate, causing the protruding tabs 5 to rotate. When a protrusion on the protruding tab 5 rotates past the contact of the quick-action switch, it triggers the contact to close. When the protrusion rotates away, the contact of the quick-action switch is in a normally open state. Simultaneously, the position sensor calculates the number of rotations of the rotating shaft. One rotation of the rotating shaft means one contact closure. The number of rotations of the rotating shaft is equal to the number of times the protrusions trigger the contact, i.e., the number of contact closures.

[0034] In the embodiment, the resistance testing mechanism comprises a testing frame 6, a moving unit and testing probes 7 arranged on the moving unit, the testing frame is provided with a slide rail 8, and the moving unit can move left and right along the slide rail 8. Specifically, the moving unit comprises a slider 9 which can move along the slide rail, a locking knob 10, a pressing handle (not shown in the figure) and a probe circuit board 11, one end of the pressing handle is fixed on the side of the slider 9 away from the slide rail, and the other end is fixed with the probe circuit board 11, and a worker can raise or lower the probe circuit board 11 by operating the pressing handle, the pressing handle is used to make the probe circuit board lower to make the testing probes contact with the connecting post bolt surface of the quick-acting switch according to the worker's pressing action, or make the probe circuit board rise to make the testing probes separate from the connecting post bolt surface of the quick-acting switch according to the worker's pulling action. The locking knob 10 is arranged on the pressing handle and is used to lock the pressing handle; when the pressing handle is pressed, the probe contacts the connecting post bolt surface of the quick-acting switch, and the worker can rotate the locking knob downward to lock the pressing handle or rotate the locking knob upward to unlock the pressing handle. The probe circuit board 11 is provided with a plurality of testing probes 7, and the probe circuit board is connected with a PLC module to send the resistance value of the testing probes when the contacts are closed to the PLC module. In the embodiment, as shown in Figures 4-7 , the PLC module comprises an MCU circuit 100 and a 5V filter circuit 200, a 24V-5V voltage reduction circuit 300, an indicator light circuit 400 and an analog-digital conversion circuit 500 connected with the MCU circuit 100 respectively, wherein, Figure 7 the current source 510 for providing power for resistance testing is further included.

[0035] Specifically, the touch display screen can also store the number of actions of the quick-acting switch contacts and the resistance value of the quick-acting switch contacts when the contacts are closed.

[0036] Specifically, as shown in Figure 7 , the analog-digital conversion circuit comprises an ADC chip CS1237, the analog signal input pins AINN and AINP of the ADC chip CS1237 are connected with the current source through a wire-to-board connector HX25003, and the analog signal input pins AINN and AINP are also connected with the probe circuit board to convert the testing resistance value from an analog signal to a digital signal; the digital signal output pins SDA1 and SCK1 of the ADC chip CS1237 are connected with the MCU circuit, and the A3V3 voltage is connected with the VDD pin of the ADC chip CS1237.

[0037] Specifically, as shown in Figure 8The PLC module further comprises a touch display screen driving communication circuit, the touch display screen driving communication circuit comprises a transceiver chip SP3232EEY, the pins TXD1, RXD1, TXD3 and RXD3 of the transceiver chip SP3232EEY are connected with the MCU circuit, and are used for receiving driving instructions from the MCU circuit or forwarding test instructions issued by a user to the MCU circuit.

[0038] The following is described in combination with a specific implementation process:

[0039] The quick-action switch is placed on the contact action test frame, a worker issues a test instruction through the touch display screen, the PLC module forwards the test instruction to a speed regulating motor in the contact action test mechanism, the speed regulating motor drives a rotating shaft of the contact action test frame to rotate, the convex of the concave-convex piece on the rotating shaft rotates through the contact of the quick-action switch to trigger the contact to close, one-time contact closing test of the quick-action switch is realized, and a position sensor arranged on the rotating shaft records the number of rotations (i.e. the number of times of contact closing of the quick-action switch), when the test is finished, the number of tests is sent to the PLC module and displayed on the touch display screen.

[0040] The worker operates the moving unit, so that the test probe is connected with the pin connection bolt surface of the quick-action switch, when the worker issues a test instruction through the touch display screen to perform contact closing test of the quick-action switch, the test probe transmits the detected resistance when the contact is closed to the PLC module through the A / D conversion circuit and displays on the touch display screen. The PLC module can also judge whether the received resistance value conforms to a preset range, if yes, the touch display screen is returned that the closing resistance of the quick-action switch is normal, otherwise, the touch display screen is returned that the closing resistance of the quick-action switch is abnormal. The judgment of the PLC module on whether the received value (such as the resistance value) conforms to the preset range is prior art, which is not described herein.

[0041] The utility model discloses can realize the automatic test to quick-action switch performance and data index, by mechanical operation replaces manual operation, compared with prior quick-action switch test method, need not manual frequent point press quick-action switch to carry out quick-action switch contact test or need to adopt multimeter to test the resistance value when the contact closes, greatly reduce the artificial cost, improve test efficiency and test quality, avoid the influence that quick-action switch test efficiency is too low to vehicle maintenance and car operation.

[0042] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, still belongs to the range of the utility model technical scheme.

Claims

1. A subway train quick-acting switch testing device, characterized in that, Including test platform, touch display screen and PLC module, the test platform is provided with: Contact action test mechanism for multiple contact action test of quick acting switch; Resistance test mechanism for testing the resistance value when the quick acting switch contact is closed; The touch display screen is used for receiving the test instruction issued by the user; The PLC module is connected with the touch display screen, contact action test mechanism and resistance test mechanism respectively, used for obtaining the test instruction and forwarding to the contact action test mechanism and resistance test mechanism, and sending the obtained quick acting switch contact action times and the resistance value when the quick acting switch contact is closed to the touch display screen for display.

2. The subway train quick action switch testing device of claim 1, wherein, The contact action test mechanism includes a speed regulating motor, a contact action test frame and a position sensor, the quick acting switch is placed on the contact action test frame, the contact action test frame includes a rotating shaft and a plurality of concave-convex pieces arranged on the rotating shaft and contacting the quick acting switch contact; The speed regulating motor is connected with the PLC module, the output shaft of the speed regulating motor is connected with the rotating shaft, used for driving the rotating shaft to rotate; The position sensor is arranged on the rotating shaft and connected with the PLC module, used for calculating the number of rotations of the rotating shaft.

3. The subway train quick action switch testing device of claim 1, wherein, The resistance test mechanism includes a test frame, a moving unit and a test probe arranged on the moving unit, the test probe is connected with the pin of the quick acting switch by bolt connection; The test frame is provided with a slide rail, and the moving unit can move left and right along the slide rail.

4. The subway train quick action switch testing device of claim 3, wherein, The moving unit includes a slider which can move along the slide rail, a crimping handle and a probe circuit board, one end of the crimping handle is fixed on the side of the slider away from the slide rail, and the other end is fixed with the probe circuit board, the probe circuit board is provided with a plurality of test probes for connecting with the quick acting switch, and the probe circuit board is connected with the PLC module.

5. The subway train quick action switch testing device of claim 1, wherein, The PLC module includes an MCU circuit and a filter circuit, a voltage reduction circuit, an indicator light circuit and an analog-digital conversion circuit connected with the MCU circuit respectively.

6. The subway train quick action switch testing device of claim 5, wherein, The analog-digital conversion circuit includes an ADC chip CS1237, the analog signal input pins AINN and AINP of the ADC chip CS1237 are connected with the current source through a wire-to-board connector HX25003, and the analog signal input pins AINN and AINP are also connected with the resistance test mechanism, so as to convert the test resistance value from analog signal to digital signal; The digital signal output pins SDA1 and SCK1 of the ADC chip CS1237 are connected with the MCU circuit, and the A3V3 voltage is connected with the VDD pin of the ADC chip CS1237.

7. The subway train quick action switch testing device of claim 5, wherein, The PLC module further includes a touch display screen driving communication circuit, which includes a transceiver chip SP3232EEY, the pins TXD1, RXD1, TXD3 and RXD3 of the transceiver chip SP3232EEY are connected with the MCU circuit, used for receiving the driving instruction from the MCU circuit or forwarding the test instruction issued by the user to the MCU circuit.

Images