Due to design flaws and continuing role of external forces

trace leakage from imperfectly small pressure vessels will occur intentionally or accidentally

which is a big threat to both our life and environment.It is not easily detected for its insignificant appearance

thus tending to be potential safety concerns caused by the increasing of toxic or flammable gas.To solve this problem

a lighter trace leakage detection method and detection instrument based on gas lighter are developed.The model of gas trace leakage and double detection algorithm which is supported by the typical relationship between the output impedance of detection senor and the leakage volume fraction is set up

aiming at realize quick target positioning among batched samples and high-precision detection in feature matching.Experimental results show that this detection method of lighter gas trace leakage is efficient and the missing detection rate is less than 0.01 %.This technology can be also applied to trace leakage detection for other small pressure vessels.