Industrial Computer Used on Vehicle Performance Test System

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Automobile Aggregate Function Performance Detection System (AAFPDS) is an automobile detection system that uses modern detection technology, electronic technology, and computer application technology to detect and diagnose automobiles without disassembly. It can detect and diagnose all the parameters and possible faults to evaluate the performance of automobiles.

AAFPDS not only inspects the dynamics, economy, reliability, environment, and safety management of automobiles but also evaluates the servicing quality and technical status of active automobiles. The testing devices for weighing, braking, speed, exhaust gas, and smoke, light, and sound are connected to industrial Panel PCs. All the signals from testing devices are collected and converted into digital signals which will be transmitted to the host and stored. The test report is made according to the obtained data, and the functions of data-query analysis and statistics are provided. The whole system realizes the automated management and information sharing of automobile safety inspections.

Operating Principles

The test line is divided into three working phases. The task of the first phase is to test the speed, exhaust gas, and chassis of the automobile while the second phase is to test braking performance on axis-weight measurement platform and braking testing platform. The testing items in the third phase mainly include sideslip, lighting, sound level, and so on. When the automobile is being tested on the test line, the driver is required to operate according to the prompts on the LED dot-matrix screen. Test trigger signals are provided by photoelectric switches.

The test flow is shown as follows. Firstly, all the automobiles to be tested need to be logged in to the computer for queuing. If the first station is idle, it will suggest testing an automobile. When the driving axle reaches the speed test bench, the lifter will be lowered down by the main control computer and speed test prompts will be displayed on the screen. Normally, a 50km/h test is given, where the driver is required to adjust the speed to 50km/h, and the exact speed is recorded by the computer. After the test, the tires will be released by the lifter, allowing the automobile to enter the next station. The second station mainly involves the braking test, the main device of which is the single axle roller opposite forces type brake tester, and the motor is driven by the electrical cabinet that is controlled by the signals from the main control computer. The third station mainly involves the lighting test, which is done by a lighting tester. The sideslip test is performed when the automobile is driven out. After all, tests are done, the main control computer will transmit all the data to the data processing computer, which will print out the data in a given format and store it in the database for future retrieval. More than one automobile can be tested simultaneously for higher efficiency.

System Evaluation

AAFPDS achieves the networking of automobile tests, making the sharing of information, hardware, and software resources possible. All the automobile aggregate function performance detection stations across the country are connected to form a wide area network so that traffic administrations are timely informed of the automobile information in different regions.

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