ULTRASONIC GAS LEAK DETECTOR WITH FALSE ALARM DISCRIMINATION

摘要

An ultrasonic gas leak detector is configured to discriminate the ultrasound generated by a pressurized gas leak into the atmosphere from false alarm ultrasound generated by other mechanical, electrical, acoustic or biological sources in the vicinity. The ultrasonic gas leak detector comprises a sensor system for detecting ultrasonic energy in the atmosphere and providing sensor signals, the sensor system including a microphone responsive to ultrasonic energy in the atmosphere, and an electronic controller responsive to the sensor signals. The electronic controller is configured to provide a computation function for generating sensor signal values representative of sensed ultrasonic energy, and an Artificial Neural Network (ANN) function for processing signals derived from the digital sensor signals and applying ANN coefficients configured to discriminate false alarm sources from gas leaks, and providing ANN outputs indicating a decision whether a gas leak has been detected. An output function generates detector outputs indicative of the ANN outputs and the sensor signal values.