A smart design of coolant tank leak testing equipment in car manufacture using fault detection and isolation observer based method

In car manufacture industry (in Shanghai), we need to do leak test for coolant tank. Normally, many coolant tanks e.g. 5 have to be tested at the same time. The traditional test system has only one pressured liquid input with a single pressure sensor and a temperature sensor to monitor and control the coolant tank leak test system. Once a tank leaked, it was difficult to identify which one in testing had been leaking. This paper presents a smart design of the test equipment for a coolant tank leak test using existing testing equipment. This design applied fault detection and isolation observer based method.