| Quality is the sign of quality of enterprise, quality is the guarantee of enterprise benefits, and quality is the embodiment of enterprise advance. In a word, product quality is the lifeline of enterprise. Test equipment is the important material foundation of the system of product warranty. Any product is been necessary before pushing to market, carried out quality inspection. Due to 10 years development, FAW-VOLKSWAGEN has greatly contributed to the reality of truckload and crucial component promptly produced domestically. Components need to carry out test for its expected function and reliability before truckload assembly, only, believe qualified rear, can truckload installation. In this paper, in order to the test in home, we have carried out the car research and development of the testing stand of electrical equipment of auto body. This testing stand is mainly used in the expected function of electrical equipment for altering type JettaA 2, in addition, in the reliability under the indoor operating mode of imitating test. Here reliability to denote system or device can complete the probability of expected function under the indoor operating mode of imitating test and in assigned time. The operating mode of imitating test is relative to true operating mode. Under simulated experiment operating mode, the ratio between invalid form and each device fault frequency of systematic major device and the systematic invalid form under true operating mode and fault several ratios keep basically consistent.The major detection content of testing stand of electrical equipment of auto body is as follows: (1) Function inspection: As Jetta A 2 is altered, the control function of type centralized control system inspects, the control of dome light subsystem, glass rise and down subsystem, and central lock control subsystem, and whether it is to reach requirement that rain scrapes ware revolving angle. The above functions can be classified to overall automatically verify. (2) Exhausted circulating experiment: As is concerned with every corresponding electrical equipment can also make up alone to carry out reliability (life) experiment. (3) Property analysis: As the data that gets in experiment carries out data handling, reaches conclusion, also makes further theoretical foundation for the test accessory improvement of place detection for test result. The testing stand choose computer --- PLC-- - actuator --- sensor feedback control test way. Employed Semens PC-670 for the computer testing system, which develop to the operation set, the data in course to alternate, take notes, handle and test form generation. Adopt German S7-300, the formation and output of controller, transmission and the collection of measure signal can be made, which under the management of last position machine—Semens PC-670. Actuator cost mainly with Germany this pneumatic door of device control character that hold company and rear case cover, Japan produce step into generator to realize the movement of group switch and fire switch. To guarantee detection data analysis and the reliability of detection, have used various corresponding sensors to complete closed-loop control and data collection. Since for simulated Jetta A2 cars the function of each components under true operating mode and reliability, establish test rotary table in a Jetta A2 that excludes power system, corresponding electrical equipment installs according to actual location, highly guarantee its true condition. Whole position machine of measure system are put in standard control cupboard, actuator and the detecting element (sensor) installed rotary table (corresponding position of car), with the power and gas system, the Jetta A2 car function test testing stands of electrical equipment of auto body completed. Programmable controller is the electronic system of a kind of digital operational operation, which is designed specially for applying under industrial environment. It's adopting programmable memory, used to stock such kind of operation instruction as conducted logic opera... |
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