Intrinsically Safe Explosion-proof Automatic Control System Of Power Isolation In Sensor Design

Along with our country petroleum, the chemical industry and so on the dangerous industry's automaticity is getting higher and higher, in this peaceful explosion-proof system's signal gathering, the transmission data is huge, needs to link massively the scene and the automated system main engine's electrical parameter isolation sensor. The system set a higher request to the electrical parameter isolation sensor. In the latent explosion hazard's environment, the essential safekeeping of security already applied as the attachment protective measures in the product design process, namely the energy which to the voltage, the electric current as well as in the breakdown situation appears limits, thus avoids achieving the smallest detonation energy. Surge voltage which cause as a result of on-off operation or the thunder and lightning, will have in the latent explosion hazard environment to create the danger, will cause the detonation, therefore speaking of will suit this peaceful system application the electrical parameter isolation sensor design, the product will have electromagnetic compatibility abilities and so on overvoltage protection to have the specially vital significance.This project realizes the ultimate objective is the electrical parameter sensing technology, the signal recuperation technology as well as the antijamming design technique organic fusion, enhances in the signal detection, the signaling and the signal processing process reliability and the accuracy. The development suits this peaceful explosion-proof autonomous system application the electrical parameter isolation sensor, will apply in existence flammable explosive environment and so on petroleum, chemical industry, coal electrical parameter examinations and the signal isolation recuperation will change delivers the link, will enhance the industry environment automated system's security.The author has used system's circuit design mentality in this project, and mainly devotes to the following several aspect work: 1) isolates the engineering research and the design; 2) electromagnetic compatibility design. 3) Essence safe explosion-proof engineering research.Through this topic's research, has mastered the sensor design key technologies; Masters against electromagnetic compatibility key technologies and so on surge, against pulse group and anti-radiation technology; Grasped has conformed to the dangerous profession request essential safe explosion-proof technology.The development sensor can carry on the effective isolation and the examination to the industry scene signal, has the power loss to be low, the precision is high, the stable good characteristic, simultaneously has the strong electromagnetic compatibility ability, can satisfy in the bad electromagnetic environment application request.The prototype already through the linear accuracy test, the isolation pressure resistance test, the high low temperature test, as well as the long time circular telegram aging test, has not seen exceptionally. The prototype in the electromagnetic compatibility, the reliability, the secure aspect achieves the design requirements, and has obtained the third party test report. May use normally after the confirmation, satisfies the operation requirements.since has solved has isolated sensor's technical difficult problem in some special environment profession to the redundant reliable electric quantity, promoted the product further application, has certain technical sophistication.