| 摘要 |
PURPOSE: To provide a personal dose meter which is reduced in size and weight and can accurately measure the total dose and dosage rate of the user by providing the collecting electrodes of ion chambers directly one integrated circuits and compensating the leakage currents between the drains of switching transistors and integrated circuit boards. CONSTITUTION: Ion chambers 16 are formed by defining gas volume sections with semispheric tissue equivalent plastic valves and providing the sections on collecting electrodes incorporated in integrated circuits. Signals from the collecting electrodes are sent to amplifiers 20 and further sent to leakage compensating/discharge controllers 22 in an detector control/interface unit 14. In addition, the value detected by means of a dose/dosage rate calculating and control device 30 is stored in a memory 32 and connected to an operator interface 34 and an electronic interface 36. The interface 34 is provided with an alarm circuit 33. The interfaces and circuits are formed as single or a plurality of ICs. Therefore, the size and weight of a personal dose meter can be reduced and the dose meter can accurately measure the dose/dosage rate of the user.
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