Buried unexploded ordnance-oriented special cesium optical pump detector
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A cesium optical pump and detector technology, applied in the detection field, can solve the problems of long detection time and poor detection accuracy, etc.
Active Publication Date: 2018-06-29
TSINGHUA UNIV
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[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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[0069] In order to make the purpose, technical solution and technical effect of the present invention clearer, specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0070] See Figure 1-2, the embodiment of the present invention provides a special cesium optical pump detector 10 for buried unexploded bombs. The dedicated cesium optical pump detector 10 for buried unexploded bombs includes: a pumping light generation module 110 , a first optical module 120 , a magnetic resonance module 130 , a photoelectric detection module 140 , and a signal processing module 150 . The pump light generation module 110 is used to output near-infrared light. The first optical module 120 is used to convert the near-infrared light into circularly polarized light. The magnetic reso...
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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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