Electric windscreen wiper test bench and test method thereof

Abstract

The invention discloses an electric windscreen wiper test bench and a test method thereof. Comprising two windshields which are bilaterally symmetrical and obliquely arranged, a bracket for supporting the windshields, a windscreen wiper driving mechanism arranged on the bracket, a workbench arranged on the inner surfaces of the windshields, a storage cabinet arranged below the workbench, a control system, a spraying system, a data acquisition system and a power supply system. By utilizing a sensor, a PLC, a display screen, an industrial personal computer and the like, the efficiency, the precision and the automation degree of the test are improved, and the problems of low efficiency and poor precision caused by traditional manual operation are solved; the working state and the working mode of the windscreen wiper on a locomotive can be simulated, meanwhile, all data can be collected after one-time action of the windscreen wiper in each test, and the problem of low working efficiency is solved.

Description

Technical Field

[0001] The invention relates to the technical field of locomotives, in particular to an electric windshield wiper test bench and a test method thereof. Background Art

[0002] In the repair of Harmony electric locomotive C5 / C6, it is necessary to inspect and repair the wiper. The existing wiper test equipment is relatively simple, with few functions and low automation, and it is impossible to obtain accurate test data. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electric wiper test bench and a test method thereof, so as to improve the automation degree of the test, improve the test efficiency and improve the accuracy of the test results.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an electric wiper test bench, comprising two left-right symmetrical and inclined windshields, a bracket for supporting the windshields, a wiper drive mechanism arranged on the bracket, a workbench arranged on the inner surface of the windshield, a storage cabinet arranged under the workbench, a control system, a spray system, a data acquisition system and a power supply system; The wiper drive mechanism comprises a mounting seat arranged below the windshield, a wiper joint arranged on the mounting seat, a first drive assembly driving the mounting seat to move left and right, and a wiper motor driving the wiper joint to rotate; The control system includes an industrial computer, an operation terminal connected to the industrial computer, and a PLC connected to the industrial computer; the operation terminal controls the industrial computer and provides a display interface; The spray system includes a spray pipe arranged on a bracket and located above the windshield, a control pipeline connected to the spray pipe, a water tank, a spray water pump and the PLC, wherein the PLC is connected to the control pipeline to control the water tank to supply water to the spray pipe; The data acquisition system includes a pressure sensor disposed between two windshields, photoelectric sensors disposed on both sides of the back of the windshield, and the PLC, wherein the PLC collects the static pressure of the wiper on the windshield through the pressure sensor, and the PLC collects the wiper wiping frequency and angle through the photoelectric sensor; The power supply system includes an adjustable power supply, and the adjustable power supply supplies power to the PLC, the pressure sensor, the photoelectric sensor, the spray water pump, the first drive component and the wiper motor.

[0005] The present invention utilizes sensors, PLC, display screens, industrial computers, etc. to improve the efficiency, accuracy and automation of the test, and solve the problems of low efficiency and poor accuracy caused by traditional manual operations; it can not only simulate the working state and working mode of the wiper on the locomotive, but also complete the collection of all data after each test through a one-time operation of the wiper, thereby solving the problem of work efficiency, avoiding repeated operations, and single testing.

[0006] As an improvement, the first driving assembly includes a slide rail provided on the bracket and slidably matched with the mounting seat, and a driving motor driving the mounting seat.

[0007] As an improvement, the operating end includes a display screen arranged on the workbench.

[0008] As an improvement, the water tank and the adjustable power supply are arranged in a storage cabinet.

[0009] The test method of the test bench of the present invention comprises the following steps: (1) Install the wiper on the corresponding wiper connector of the mounting seat; (2) driving the mounting seat with the wiper to approach the middle pressure sensor through the first driving assembly; (3) Place the wiper on the pressure sensor for pressure testing. The PLC determines whether the wiper's clamping force meets the requirements. If so, proceed to the next step. (4) The first drive assembly and the mounting seat drive the wiper to return to the working position, the spray system is started, and the lubricant is sprayed onto the windshield through the spray pipe; (5) The wiper motor starts and drives the wiper to work normally; (6) The photoelectric sensor collects the wiping angle and wiping frequency during the operation of the wiper; (7) The PLC determines whether the wiper angle and wiper frequency are normal; if normal, adjust the low speed gear and intermittent gear to test the angle and frequency; if abnormal, an alarm is sounded.

[0010] Compared with the prior art, the present invention has the following beneficial effects: (1) The test bench has a simple structure and is easy to manufacture. It can truly simulate the actual working conditions of the locomotive wiper, complete the test of the operating parameters of the locomotive under different working conditions at one time, and display them on the display screen to avoid repeated tests; (2) The test bench has a high degree of digitization. Through industrial computers, sensors, PLCs, etc., the debugging parameters are displayed intuitively and accurately, avoiding manual counting and solving the problems of low efficiency and poor accuracy. (3) Reduce repetitive workload, automate maintenance processes, and improve labor productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a schematic diagram of the back of the test bench.

[0012] Figure 2 This is a schematic diagram of the front of the test bench.

[0013] Figure 3 This is the electrical topology diagram of the present invention.

[0014] Figure 4 This is a flow chart of the test of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] like Figures 1 to 3 As shown, an electric wiper test bench includes two left-right symmetrical and tilted windshields 4, a bracket 1 for supporting the windshields 4, a wiper drive mechanism arranged on the bracket 1, a workbench 3 arranged on the inner surface of the windshield 4, a storage cabinet 2 arranged below the workbench 3, a control system, a spray system, a data acquisition system and a power supply system, and each module is integrated on the bracket 1 to form a whole.

[0017] like Figure 1 As shown, the bracket 1 is a steel structure, and the bracket 1 and the workbench 3 can be connected into one body. The overall structure is firm and can support the simulation test of the wiper 9 stably.

[0018] like Figures 1 to 3 As shown, the wiper 9 driving mechanism includes a mounting seat 8 provided below the windshield 4, a wiper joint provided on the mounting seat 8, a first driving assembly driving the mounting seat 8 to move left and right, and a wiper motor driving the wiper joint to rotate. The first driving assembly includes a slide rail provided on the bracket 1 and slidingly matched with the mounting seat 8 and a driving motor driving the mounting seat 8; the wiper 9 can be driven to move left and right by the driving motor in conjunction with the screw nut mechanism. When the wiper 9 is driven to the middle position below the windshield 4, the wiper 9 is in a normal working position. When the wiper 9 is driven to the position closest to the middle, the wiper 9 is in a pressure detection position.

[0019] like Figures 1 to 3As shown, the control system includes an industrial computer, an operating terminal connected to the industrial computer, and a PLC connected to the industrial computer. The operating terminal includes a display screen 6 arranged on a workbench 3. The operating terminal controls the industrial computer and provides a display interface. During the test, the operator sits in front of the workbench 3 to operate the operating terminal, and understands the parameters of the test process in real time through the display screen 6, and observes the simulated environment of the wiper 9 in real time through the windshield 4. The industrial computer is used to communicate with the PLC, and the data collected by the PLC can be read into the upper computer software for data storage. At the same time, the industrial computer is equipped with a liquid crystal display screen 6 for human-computer interaction and data display. Siemens SMART series PLC is used for logic control and data acquisition. The PLC expands an AM06 analog module with 4 analog inputs and 2 analog outputs. The analog input is used to collect 2 pressure sensor data and DC110V output voltage data, and the analog output is used to adjust the DC110V output voltage. The test software development platform selects NI's test and measurement dedicated development software LabView2018 to realize the link between software and hardware. After completing data acquisition, data analysis and display can be performed. Functions can be set on the upper computer interface, including test item selection, test start, test stop, report output and other buttons. In addition, it includes alarm indicator light, operation indicator light, status indicator light, and input boxes for parameters such as test voltage and water spray interval.

[0020] like Figures 1 to 3 As shown, the spray system includes a spray pipe 7 arranged on the bracket 1 and located above the windshield 4, a control pipeline connected to the spray pipe 7, a spray water pump, a water tank and the PLC, and the PLC is connected to the control pipeline to control the water tank to supply water to the spray pipe 7.

[0021] like Figures 1 to 3 As shown, the data acquisition system includes a pressure sensor 10 arranged between two windshields 4, a photoelectric sensor 5 arranged on both sides of the back of the windshield 4, a DC voltage sensor and a PLC. The PLC collects the static pressure of the wiper 9 on the windshield 4 through the pressure sensor 10. During the test, the wiper 9 can be pressed onto the pressure sensor 10. The PLC collects the wiping frequency and angle of the wiper 9 through the photoelectric sensor 5. The photoelectric sensor 5 is placed at the starting point and the end point of the wiping range respectively. When the wiper arm moves once, the photoelectric sensor 5 can detect the action, meeting the detection requirements of the wiping frequency and angle. The DC voltage sensor is connected to the output end of the DC 110V adjustable power supply to monitor in real time whether the output voltage value is correct to ensure the reliability of the test process.

[0022] The power supply system includes an adjustable power supply, which supplies power to the PLC, the pressure sensor 10, the photoelectric sensor 5, the spray water pump, the first drive assembly and the wiper motor. The water tank and the adjustable power supply are arranged in the storage cabinet, which is simple as a whole and plays a good protective role.

[0023] like Figure 4 As shown, the test method of the electric wiper test bench includes the following steps: (1) Install the wiper 9 on the corresponding mounting seat 8, and after fixing it, click the "Start Test" button on the display screen 6; (2) Press the "left" and "right" buttons of the wiper 9 in sequence, adjust the wiper arm position of the wiper 9 to the pressure sensor 10 for pressure testing, and the measured pressure value is displayed on the display screen 6. The PLC determines whether the clamping force meets the requirements. If it passes, the green light will turn on and the next test will be carried out; if it fails, the red light will turn on and the display screen 6 will display "alarm, the clamping force is unqualified"; (3) Click the "Continue" button on the display screen 6, the wiper automatically resets, the spray system of the test bench starts and sprays lubricant on the windshield 4; the wiper 9 control box inputs undervoltage and overvoltage voltages in succession, works for 3 minutes and then cuts off the power. Click the "Continue" button, the wiper 9 control box inputs the rated voltage, adjusts the wiper high gear and starts working; (4) After working for the set time, the wiper 9 control box loses power, the wiper stops working, and the PLC determines whether the wiper angle and wiper frequency are normal; if normal, adjust the low speed gear and intermittent gear to test the angle and frequency; if abnormal, the red light is on, and the display screen 6 displays "alarm, angle unqualified" or "alarm, frequency unqualified"; (5) After the angle and frequency tests of different gears are passed, manually judge whether the spray effect of the wiper control box is normal. If it is normal, all tests are completed, the green light is on and the data is saved; if it is abnormal, the red light is on to display "Alarm, spray function abnormality".

Claims

1. An electric wiper test bench, characterized in that: It includes two windshields that are symmetrical and tilted, a bracket for supporting the windshields, a wiper drive mechanism arranged on the bracket, a workbench arranged on the inner surface of the windshield, a storage cabinet arranged under the workbench, a control system, a spray system, a data acquisition system and a power supply system; The wiper drive mechanism comprises a mounting seat arranged below the windshield, a wiper joint arranged on the mounting seat, a first drive assembly driving the mounting seat to move left and right, and a wiper motor driving the wiper joint to rotate; The control system includes an industrial computer, an operation terminal connected to the industrial computer, and a PLC connected to the industrial computer; the operation terminal controls the industrial computer and provides a display interface; The spray system includes a spray pipe arranged on a bracket and located above the windshield, a control pipeline connected to the spray pipe, a water tank, a spray water pump and the PLC, wherein the PLC is connected to the control pipeline to control the water tank to supply water to the spray pipe; The data acquisition system includes a pressure sensor disposed between two windshields, photoelectric sensors disposed on both sides of the back of the windshield, and the PLC, wherein the PLC collects the static pressure of the wiper on the windshield through the pressure sensor, and the PLC collects the wiper wiping frequency and angle through the photoelectric sensor; The power supply system includes an adjustable power supply, and the adjustable power supply supplies power to the PLC, the pressure sensor, the photoelectric sensor, the spray water pump, the first drive component and the wiper motor.

2. The electric wiper test bench according to claim 1, characterized in that: The first driving assembly includes a slide rail which is arranged on the bracket and slidably cooperates with the mounting seat, and a driving motor which drives the mounting seat.

3. The electric wiper test bench according to claim 1, characterized in that: The operating end includes a display screen arranged on a workbench.

4. The electric wiper test bench according to claim 1, characterized in that: The water tank and the adjustable power supply are arranged in the storage cabinet.

5. A test method for the electric wiper test bench as claimed in claim 1, characterized in that: The following steps are involved: (1) Install the wiper on the corresponding wiper connector of the mounting seat; (2) driving the mounting seat with the wiper close to the middle pressure sensor through the first driving assembly; (3) Place the wiper on the pressure sensor for pressure testing. The PLC determines whether the wiper's clamping force meets the requirements. If so, proceed to the next step. (4) The first drive assembly and the mounting seat drive the wiper to return to the working position, the spray system is started, and the lubricant is sprayed onto the windshield through the spray pipe; (5) The wiper motor starts and drives the wiper to work normally; (6) The photoelectric sensor collects the wiping angle and wiping frequency during the operation of the wiper; (7) The PLC determines whether the wiper angle and wiper frequency are normal; if normal, adjust the low speed gear and intermittent gear to test the angle and frequency; if abnormal, an alarm is sounded.

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