Buried unexploded ordnance-oriented special cesium optical pump detector

Abstract

The invention discloses a buried unexploded ordnance-oriented special cesium optical pump detector which comprises a pumping light generation module, a first optical module, a magnetic resonance module, a photoelectric detection module and a signal processing module. The signal processing module comprises an amplifying and filtering unit, a self-exciting oscillation unit, a magnetic resonance frequency measuring unit and a calculation unit connected in sequence; the amplifying and filtering unit comprises a first band-pass filter and a second band-pass filter; the first band-pass filter is used for coarsely measuring the electrical signal frequency; the second band-pass filter is used for finely measuring the electrical signal frequency; the self-exciting oscillation unit further comprisesa first phase shifter and a second phase shifter; the first phase shifter is connected with the first band-pass filter; and the second phase shifter is connected with the second band-pass filter. Thevalue of the electrical signal frequency is coarsely measured by virtue of the first band-pass filter and the first phase shifter. The accurate measured value of the electrical signal frequency is further obtained by virtue of the second band-pass filter and the second phase shifter, so that the detection efficiency and the detection accuracy are improved.

Description

technical field [0001] The invention relates to the field of detection, in particular to a special cesium optical pump detector for buried unexploded bombs. Background technique [0002] At present, more than 100 sites in 17 provinces and cities in China, including Heilongjiang, Jilin, Liaoning, Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin, Anhui, Jiangsu, Zhejiang, Jiangxi, Henan, Hubei, Hunan, Guangdong, and Guangxi, have been found buried of unexploded bombs. Unexploded bombs are not only widely distributed and numerous, but also buried in different places. Unexploded bombs have been found in residential areas, forest areas, fields, tunnels, and rivers. Unexploded bombs have the characteristics of small size and low mass. Therefore, the detection of unexploded ordnance is complicated and difficult. In order to completely destroy unexploded ordnance, protect the environment, and maintain the personal safety of citizens, it is necessary to provide safe, accurate, reli...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a special cesium optical pump detector for buried unexploded bombs to solve the problems of poor detection accuracy and long detection time of traditional detection equipment

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