Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1985-08-26
1987-09-22
Church, Craig E.
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
G01T 124
Patent
active
046957308
ABSTRACT:
Local radiation exposure alarm having a radiation detector used in the course of operations in nuclear power plant, a radiotherapeutic center for treatment for cancer, etc., a preamplifier for transmitting with an excellent S/N ratio a detected output signal from said detector, and a measuring unit measuring an exposure and provided with an alarm operating when the exposure exceeds a set permissible dose, and in which these detector, preamplifier and measuring unit are connected together electrically. The detector unit is shaped in a ring to be set on a finger or a toe, has a semiconductor element highly sensitive to radiation such as gamma rays incorporated therein so as to be sufficiently protected from vibrations and moisture, and is connected to the preamplifier unit through a lead wire. The preamplifier unit is provided with a fitting easy to set on and remove from an arm or the like and is connected electrically to the measuring unit also through a lead wire, and the measuring unit has a display and the alarm. The preamplifier unit has a space for holding the detector therein, and the measuring unit has a space for holding the preamplifier with the detector.
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Furukawa Hiroaki
Noda Kimio
Ozeki Kiyoshi
Watai Katsunori
Church Craig E.
Doryokuro Kakunenryo Kaihatsu Jigyodan
Freeman John C.
Ohyo Koken Kogyo Co., Ltd.
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