Patent ID: 7242309
Filing Date: 2007-07-10
Classification: G01N

Abstract:
1. A gas detection system comprising a plurality of sensor nodes located dispersedly, each having a gas sensor module and a communication control module having a controller connected with the gas sensor module and a communication system, and a server associated with each of the plural sensor nodes and sending a control signal to necessary sensor nodes, wherein each of the gas sensor module has a gas sensor, a temperature control device for the gas sensor and a temperature measuring device for the gas sensor, wherein the controller, upon detecting that the measured value of the gas sensor exceeds a predetermined threshold value, operates the temperature control device to increase the measuring accuracy of the gas sensor and informs that the measured value of the gas sensor exceeds a predetermined threshold value by way of the communication control module to the server, in the server, a definition of a sensor node in the vicinity to each of the plurality of sensor nodes is registered respectively, and the server, upon receiving the information that the measured value of the gas sensor of any one of said sensor nodes exceeds the predetermined threshold value sends a control signal for lowering the threshold value relative to the measured value of the gas sensor to each of the other corresponding sensor nodes in the vicinity.