| 摘要 |
PURPOSE:To attain to enhance noise resistance, by providing a high voltage supply power source in the vincinity of a radiation detector, and coupling a monitor chamber and a detection site by an optical signal. CONSTITUTION:A control signal, which is subjected to optical conversion, from a monitor chamber 20 through an electrooptic converter 12 is supplied through an operation circuit 11 while converted by the photoelectric converter 13 of a remote site terminal device 15 and a high voltage supply power source 3 provided in the vicinity of a radiatin detector 1 is controlled to control the supply of high voltage to the detector 1. The radiation amount measuring signal due to the detector 1, to which a high voltage power source is supplied, is converted to a light signal by the electrooptic converter 12 of the terminal device 15 and sent out to the monitor chamber 20. Therefore, noise resistance to the signal transmission between the monitor chamber and a site is enhanced and the reliability of a radiation measuring apparatus is enhanced. |
