In this paper inspired by the immune mechanism in the biologic immune system,we discussed deeply the generation principle and the matching algorithm of the detector.

A Low Power Dissipation Catalytic Combustible Gas Detecting Element;

Fault diagnosis and maintenance of detecting element in NC machine;

PLC system is now widely used in many control systems In such systems limit switches are very common detecting elements But because limit switches have so many touch points and troubles always occur,which will influenc PLC system work In this article,the author pus forward some methods to improve the reliability of the

Through the information share and mutual cooperation between the detect unit and the manage controller,the model simulates the principle such as diversity,distribution,original response and secondary response of the biology immune system.