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公开(公告)号：US20220035055A1
公开(公告)日：2022-02-03
申请号：US17276957
申请日：2019-08-02
申请人： HITACHI, LTD.
发明人： Takahiro TADOKORO , Yuichiro UENO , Katsunori UENO , Kouichi OKADA , Shuichi HATAKEYAMA , Yasushi NAGUMO , Tooru SHIBUTANI , Keisuke SASAKI , Akira OOZONE
摘要： A radiation monitor includes a radiation detection unit detecting radiation, and an optical fiber transmitting photons emitted from a light emitting element of the radiation detection unit, wherein the radiation detection unit includes a first light emitting element generating a photon in response to incident radiation, a chemical compound part having chemical compounds which generate charged particles by nuclear reactions with incident neutrons, and a second light emitting element being located between the first light emitting element and the chemical compound part and generating a photon in response to radiation.
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公开(公告)号：US20220236430A1
公开(公告)日：2022-07-28
申请号：US17614410
申请日：2020-05-18
申请人： HITACHI, LTD.
发明人： Shuichi HATAKEYAMA , Kouichi OKADA , Katsunori UENO , Takahiro TADOKORO , Yuichiro UENO , Tooru SHIBUTANI , Keisuke SASAKI
摘要： A radiation monitoring device realizes a high measurement function. Therefore, a radiation monitoring device includes: a radiation detection unit including a phosphor that emits light by incident radiation; a photodetector that converts a single photon or a photon group having a plurality of the single photons generated by the radiation detection unit into an electric pulse signal; and an analysis unit that analyzes the electric pulse signal. The phosphor emits light based on a plurality of light emission phenomena having different decay time constants. The analysis unit includes: a signal discrimination circuit that discriminates the electric pulse signal output from the photodetector; a dose rate calculation circuit that calculates a dose rate of the radiation based on a count rate of the discriminated electric pulse signal; and an application energy calculation circuit that calculates application energy of the radiation based on a peak value of the discriminated electric pulse signal.
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公开(公告)号：US20170315241A1
公开(公告)日：2017-11-02
申请号：US15531910
申请日：2015-11-27
申请人： HITACHI, LTD.
发明人： Takahiro TADOKORO , Kazuo TOMINAGA , Katsunori UENO , Kouichi OKADA , Yasushi NAGUMO , Hitoshi KUWABARA , Keisuke SASAKI
摘要： A radiation monitor for accurately measuring the dose rate of radiation by suppressing the risk of explosion or the like is provided. The radiation monitor includes a radiation emitting element which includes a light emitting part emitting light of an intensity corresponding to a dose rate of incident radiation, an optical fiber which is connected to the radiation emitting element and transmits the light emitted from the light emitting part, an electric pulse converter which is connected to the optical fiber and transmits one electric pulse for one photon of the transmitted light, an electric pulse detector which is connected to the electric pulse converter and counts the electric pulse transmitted from the electric pulse converter, and an analyzer which is connected to the electric pulse detector and converts the electric pulse count rate obtained by the electric pulse detector into a radiation dose rate.
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