汽车车灯成品质量测试系统设计

Design of Quality Inspection System Used for Automobile Lamps

严格控制汽车车灯成品出厂质量是车灯生产厂家在车灯生产过程中的基本目标之一,然而在批量生产情况下,依靠人力或现有的光强测试设备检验车灯质量存在效率低下问题。设计了一种基于电流检测的用于批量检验汽车车灯成品质量的测试系统,并且解决了MOSFET继电器的非恒量压降补偿问题,进而实现了汽车车灯的自动化检测。实验结果表明,测试系统施加于车灯供电端口的电压可在9~22V内连续调节、调节精度±0.1V;电流测量范围10~2 000mA、精度±2mA。在某车灯生产厂家的实际应用结果表明,测试系统加快了车灯质量检验速度,相当程度地提高了劳动生产率。

One of the basic aims for the automobile lamp manufacturing enterprises is to ensure outgoing quality of products.For mass production of automobile lamps,it is inefficient to employ manual labor or use currently available lumen output detecting equipments for quality inspection.A new quality inspection system for automobile lamps is presented.Since the voltage drop of the MOSFET relay varies with the current that flows through it,the problem of how to compensate that voltage drop is also addressed.The proposed inspection system eventually realizes the automatic operation of quality inspection of automobile lamps.The experimental results show that：1）the supply voltage of the proposed system to the automobile lamp can be smoothly adjusted within a range of 9 V to 22 V with a precision of ±0.1 V;2）the current measuring range of the proposed system is from 10 mA to 2A with aprecision of ±2 mA.It has been validated from the use experience of the proposed system in a lamp manufactory that the proposed system can greatly reduce the time spent for quality inspection and hence substantially improve the productivity.