CN104090175B - A kind of rain shaving electrical machine temperature protector functional breadboard system and its control method - Google Patents

Abstract

The invention discloses a functional test system for a wiper motor temperature protector, which comprises an industrial computer, a data acquisition card, a load controller, a motor driver, a high and low temperature box and a numerical control load, and the industrial computer is connected with the data acquisition card through a data connection line , the data acquisition card is connected to several wiper motors, load controllers and motor drivers at the same time, and several wiper motors are connected to several numerically controlled loads through transmission shafts, and the load controller is connected to numerically controlled loads, and several Each wiper motor is connected to the motor driver through a power line; the wiper motor, transmission shaft and numerical control load are all set in the high and low temperature box, and the industrial computer is connected to the communication port of the high and low temperature box through a data line. The wiper motor temperature protector function test system can judge the performance of the wiper motor temperature protector, and the test environment simulates the working conditions of the wiper motor in the actual driving process of the car, and the accuracy of the test results is high.

Description

A function test system and control method of a wiper motor temperature protector

technical field

The invention relates to the field of automobile performance testing, in particular to a functional testing system and a control method for a wiper motor temperature protector.

Background technique

Among the electrical components of automobile products, the unqualified rate of wiper motors is relatively high. Through the analysis of most unqualified products, most of them are due to the failure of the temperature protector inside the wiper motor, which leads to the failure of the wiper motor as a whole. There has been a lack of effective test methods for the internal temperature protector of the scraper motor. Chinese Patent Publication No. CN102288323A, date of publication December 21, 2011, titled "Temperature Rise Monitoring Method of Locomotive Traction Motor" discloses a method for monitoring temperature rise of locomotive traction motor, which is characterized in that the following steps are taken: A. Setting Corresponding relationship between traction motor voltage, current and ventilation volume and temperature rise; B. Set the critical value of traction motor temperature rise; C. Detect the real-time value of traction motor voltage, current and ventilation volume; D. Calculate the corresponding traction motor temperature rise Real-time value; E. Compare the real-time value of temperature rise with the critical value, if the real-time value is less than the critical value, return to step C; F. If the real-time value of temperature rise is equal to or greater than the critical value, alarm and cut off the traction motor. The disadvantage is that this monitoring method can only monitor the temperature of the running motor, and cannot be tested before use, and lacks a method to obtain the performance of the motor temperature protector in advance.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the lack of effective detection of the temperature protector inside the wiper motor in the prior art, and provide a functional test system and control method for the temperature protector of the wiper motor. , the relevant personnel can have an accurate judgment on the eligibility of the motor temperature protector.

The purpose of the present invention is to be achieved through the following technical solutions:

A functional test system for a wiper motor temperature protector, including an industrial computer, a data acquisition card, a load controller, a motor driver, a high and low temperature box, and a numerical control load. The industrial computer is connected to the data acquisition card through a data connection line, and the data acquisition card Simultaneously connect several wiper motors, load controllers and motor drivers. Several wiper motors are connected to several numerically controlled loads through transmission shafts. The load controller is connected to the numerically controlled load. The motor driver is powered by the power supply. And several wiper motors are connected to the motor driver through power lines; the wiper motors, transmission shafts and numerical control loads are all arranged in the high and low temperature box, and the industrial computer is connected to the communication port of the high and low temperature box through data lines. The data acquisition card simultaneously collects the information sent by the load controller, the voltage and current data output by the motor driver, and transmits the information to the industrial computer through the data connection line; the high and low temperature box supports wire control, and the industrial computer connects the high and low temperature box The communication port controls the temperature of the high and low temperature boxes. The wiper motor, transmission shaft and numerical control load are all set in the high and low temperature box to simulate the working condition of the wiper motor during the actual driving of the car.

As a preferred solution, the industrial computer is connected to the communication port through the RS232 data line, and the industrial computer is connected to the data acquisition card through the USB data line.

As a preferred solution, the load controller includes a CPU, a left tension sensor and a right tension sensor, the left tension sensor is connected with the first operational amplifier, the right tension sensor is connected with the second operational amplifier, the first operational amplifier and the second operational amplifier The amplifier is connected with the CPU through logic and operation. The left tension sensor and the right tension sensor feed back the tension data in real time. The industrial computer compares the left tension sensor and the right tension sensor with the theoretical data under the condition of specific ambient temperature and specific motor driver output voltage and current. If the data is different If it is larger, it indicates that the temperature protector is unqualified.

A control method of a wiper motor temperature protector function test system, based on a wiper motor temperature protector function test system, comprising the following steps:

In the first step, the system starts to work, the industrial computer controls the motor driver to provide voltage to make the wiper motor start to work normally, and at the same time, the load controller controls the numerical control load to load the wiper motor;

In the second step, the data acquisition card collects the signal data of the left tension sensor and the right tension sensor of the load controller, the data acquisition card also collects the voltage and current data output by the motor driver, and the industrial computer collects the temperature data of the high and low temperature box. Signal data, temperature data and set load force to judge whether the signal data is normal;

In the third step, if the signal data is normal, the system will continue to work. If the signal data exceeds the range set by the industrial computer, the industrial computer will record the signal data, temperature data and load force at this time, and report to relevant personnel.

The beneficial effect of the present invention is that the function test system of the temperature protector of the wiper motor can judge the performance of the temperature protector of the wiper motor, and the test environment simulates the working condition of the wiper motor in the actual driving process of the automobile. The result is more accurate.

Description of drawings

Fig. 1 is a circuit principle connection block diagram of the present invention.

Among them: 1. Industrial computer, 2. Data acquisition card, 3. Load controller, 4. Motor driver, 5. Power supply, 6. Communication port, 7. Transmission shaft, 8. Numerical control load, 9. High and low temperature box, M , wiper motor.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment: a kind of wiper motor temperature protector function test system, its circuit principle connection diagram is shown in Figure 1, comprises industrial computer 1, data acquisition card 2, load controller 3, motor driver 4, high and low temperature box 9 and CNC load 8, the industrial computer is connected to the data acquisition card through the USB data connection line, and the data acquisition card is connected to three wiper motors M, load controller and motor driver at the same time, and the wiper motors are connected to the CNC load one by one through the transmission shaft 7 The corresponding phases are connected, the load controller is connected with the numerical control load, the motor driver is powered by the power supply 5, and the motor driver can supply power to 8 wiper motors at most. In this embodiment, 3 wiper motors are connected to the motor driver through the power line; The wiper motor, transmission shaft and numerical control load are all set in the high and low temperature box, and the industrial computer is connected with the communication port of the high and low temperature box through the RS232 data line. The load controller includes a CPU, a left tension sensor and a right tension sensor, the left tension sensor is connected with the first operational amplifier, the right tension sensor is connected with the second operational amplifier, and the first operational amplifier and the second operational amplifier are logically ANDed The CPU is connected.

A control method of a wiper motor temperature protector function test system, based on a wiper motor temperature protector function test system, comprising the following steps:

In the first step, the system starts to work, the industrial computer controls the motor driver to provide voltage to make the wiper motor start to work normally, and at the same time, the load controller controls the numerical control load to load the wiper motor;

In the second step, the data acquisition card collects the signal data of the left tension sensor and the right tension sensor of the load controller, the data acquisition card also collects the voltage and current data output by the motor driver, and the industrial computer collects the temperature data of the high and low temperature box. Signal data, temperature data and set load force to judge whether the signal data is normal;

In the third step, if the signal data is normal, the system will continue to work. If the signal data exceeds the range set by the industrial computer, the industrial computer will record the signal data, temperature data and load force at this time, and report to relevant personnel.

Claims (3)

1. A wiper motor temperature protector function test system is characterized in that it comprises an industrial computer, a data acquisition card, a load controller, a motor driver, a high and low temperature box and a numerically controlled load, and the industrial computer is connected to the data acquisition card by a data connection line The data acquisition card is connected to several wiper motors, load controllers and motor drivers at the same time, and several wiper motors are connected to several numerical control loads through transmission shafts, and the load controller is connected to the numerical control load. The motor driver is powered by the power supply, and several wiper motors are connected to the motor driver through the power line; the wiper motor, transmission shaft and numerical control load are all set in the high and low temperature box, and the industrial computer communicates with the communication port of the high and low temperature box through the data line connected; the load controller includes a CPU, a left tension sensor and a right tension sensor, the left tension sensor is connected with the first operational amplifier, the right tension sensor is connected with the second operational amplifier, the first operational amplifier and the second operational amplifier The amplifier is connected with the CPU through logic and operation. 2. The function test system of a wiper motor temperature protector according to claim 1, wherein the industrial computer is connected to the communication port through the RS232 data line, and the industrial computer is connected to the data acquisition card through the USB data line. 3. A control method of a wiper motor temperature protector function test system, based on the wiper motor temperature protector function test system according to claim 1, characterized in that, comprising the following steps: In the first step, the system starts to work, the industrial computer controls the motor driver to provide voltage to make the wiper motor start to work normally, and at the same time, the load controller controls the numerical control load to load the wiper motor; In the second step, the data acquisition card collects the signal data of the left tension sensor and the right tension sensor of the load controller, the data acquisition card also collects the voltage and current data output by the motor driver, and the industrial computer collects the temperature data of the high and low temperature box. Signal data, temperature data and set load force to judge whether the signal data is normal; In the third step, if the signal data is normal, the system will continue to work. If the signal data exceeds the range set by the industrial computer, the industrial computer will record the signal data, temperature data and load force at this time, and report to relevant personnel.