Electronics system of portable low-power-consumption tissue-equivalent proportional counter

A proportional counter and electronic system technology, applied in the field of electronic systems, can solve problems such as inaccurate measurement and difficult control, and achieve the effect of reducing circuit components, reducing power consumption, and reducing circuit power consumption

Active Publication Date: 2013-09-18
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a portable low-power electronic system suitable for organizing equivalent proportional counters, so as to overcome the defects of inaccurate measurement and difficult control of the original design. After the user predicts the radiation field for the measurement object, Selectable measurement mode to reduce power consumption

Method used

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  • Electronics system of portable low-power-consumption tissue-equivalent proportional counter
  • Electronics system of portable low-power-consumption tissue-equivalent proportional counter

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Embodiment

[0021] The whole circuit of the TEPC electronic system provided by the present invention is composed of two major parts of analog and digital, and the analog part has three parts of charge-sensitive preamplifier, main amplifier and peak holder. It completes the pre-amplification of the detector signal, filter shaping amplification and gate integration. The digital part mainly includes the control logic circuit of the peak hold circuit, which provides various control signals required by the gate integration circuit.

[0022] Preamplifier

[0023] The main function of the preamplifier is to amplify the signal from the detector, which requires very low noise. Therefore, in order to ensure that the preamplifier has a higher signal-to-noise ratio and faster time response, the circuit structure should be as simple as possible. In the design of the circuit, a combination of a field effect transistor (model 2SK152) and a preamplifier (model A250) is used, and a peripheral feedback ...

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Abstract

The invention relates to an electronics system of a portable low-power-consumption tissue-equivalent proportional counter. The electronics system comprises a pre-amplifier connected with the output end of the tissue-equivalent proportional counter, wherein an output signal of the pre-amplifier is continuously amplified by sequentially passing through two stages of main amplifiers, an output signal of each stage of main amplifier is led out, then respectively passes through a peak retainer and an analog-to-digital converter which are connected with each main amplifier, and are conveyed into a singlechip, and the singlechip programs a threshold so as to control the alternative range of linear energy spectrum data. According to the electronics system, the problems of inaccuracy in measurement and difficulty in control in previous designs are solved; and meanwhile, circuit components are reduced and the circuit power consumption is decreased.

Description

technical field [0001] The invention belongs to an electronic system, in particular to an electronic system with a portable low-power consumption equivalent proportional counter. Background technique [0002] Tissue Equivalent Proportional Counter (TEPC) system obtains absorbed dose, effective quality factor and dose equivalent by measuring the quantity directly related to microdosimetry, that is, line energy. The measurement method based on the TEPC system can directly simulate and measure the dose equivalent of human cells and tissues, and has been widely used in basic subject research in the fields of microdosimetry, radiation protection, radiation therapy, and space radiation abroad. [0003] In workplaces around nuclear facilities such as nuclear reactors and large accelerators, complex mixed ionizing radiation often exists. The requirements for weight and power consumption are quite strict. Although the TEPC detector is small enough to be made into a portable instrum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/161
Inventor 张伟华王志强熊文俊李春娟刘毅娜陈军李玮骆海龙
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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