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Multi-channel current type radiation detecting real-time comparison measuring device

A radiation detection and measurement device technology, which is applied in the field of nuclear electronics, can solve the problem of simultaneous test recording and comparison of multiple signals, and achieve the effects of reducing the experimental scale, strong scalability, and cost saving

Active Publication Date: 2013-11-27
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

However, no matter how fast the switch is switched by this method, only one signal can be effectively measured and recorded at the same time, which fails to achieve the purpose of simultaneously testing, recording and comparing multiple signals

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Embodiment Construction

[0020] The multi-channel current type radiation detection real-time comparison measuring device of the present invention, see figure 1 , including 1 to 8 channels of amplification and I-V conversion circuits (A1-A8), range control circuits (C1-C8), an 8-channel A / D conversion circuit U1, and a central control unit U2, providing A / D conversion circuits The circuit U3 for voltage reference, the circuit U4 for providing the clock signal for the A / D conversion circuit, the terminal U5 for touch liquid crystal display, the terminal U6 for computer application software, and the branching unit for power conversion U7.

[0021] 1 to 8 channels of amplification and I-V conversion circuits (A1-A8), see figure 2 , used to amplify and convert weak input current signals into voltage signals, including integrated operational amplifiers, power processing circuits and feedback networks. The integrated operational amplifiers (Amp1-Amp8) have the same structure, are isolated from each other, ...

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Abstract

A multi-channel current type radiation detecting real-time comparison measuring device is provided. The multi-channel current type radiation detecting real-time comparison measuring device comprises one to eight magnification and I-V conversion circuits and measuring range control circuits, one eight-channel A / D conversion circuit, one central control unit, a circuit for providing a voltage reference to the A / D conversion circuit, a circuit for providing clock signals to the A / D conversion circuit, a touch control liquid crystal display terminal and a power source switching shunt circuit unit. According to the multi-channel current type radiation detecting real-time comparison measuring device of the invention, a decoding circuit and a photoelectric isolation circuit are connected in series with the measuring range control circuits in a combined manner, such that automatic measuring range switching of 32 measuring ranges in eight channels, and therefore, the measuring range of the system can be expanded, and program control and digital crosstalk-resisting abilities can be improved. The multi-channel current type radiation detecting real-time comparison measuring device of the invention can measure multi-channel wide-dynamic-range weak current, perform real-time display, recording and comparison, and can be applied to radiation detection.

Description

technical field [0001] The invention belongs to the technical field of nuclear electronics, and in particular relates to a measurement system capable of multi-channel large dynamic weak current measurement and real-time comparison. Background technique [0002] In radiation detection, current method is one of the most basic methods. Many detectors convert radiation signals into current signals for measurement. Each detector has its own characteristics and test range, so it is often necessary for multiple detectors to participate in the detection at the same time, and then compare the test results in real time. The current range to be measured spans from ±10mA to ±0.01pA. The measuring instrument not only needs to overcome the signal crosstalk during the measurement of extremely weak signals, but also completes the range frequency control and real-time measurement, processing, transmission and recording of each channel at the same time. In addition, radiation detection ofte...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R15/09
Inventor 王晶渠红光田耕李海涛阮林波张雁霞
Owner NORTHWEST INST OF NUCLEAR TECH
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