Control device for low-background alpha-beta measuring instrument

A control device and measuring instrument technology, applied in the direction of measuring device, program control, radiation measurement, etc., can solve the problems of lower stability and reliability, loss of measurement events, and lack of scalability of the circuit, so as to increase accuracy, Increased stability, the effect of high circuit operation stability

Inactive Publication Date: 2013-03-13
湖北方圆环保科技有限公司
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AI Technical Summary

Problems solved by technology

Under the principle of serial operation, the microcontroller will have greater limitations, resulting in the loss of more measurement events
Moreover, the peripheral gate circuit and trigger circuit need to be added according to the increase of the number of channels, so that the circuit does not have scalability, and the use of more separate electronic devices increases the overall failure rate of the instrument, reducing the overall stability and reliability

Method used

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  • Control device for low-background alpha-beta measuring instrument
  • Control device for low-background alpha-beta measuring instrument
  • Control device for low-background alpha-beta measuring instrument

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Embodiment Construction

[0024] The present invention is described in more detail below by means of examples, but the following examples are only illustrative, and the protection scope of the present invention is not limited by these examples.

[0025] like figure 1 As shown, the present invention mainly includes a nuclear pulse pre-processing unit 100 , an FPGA / CPLD-based main control calculation unit 200 , a communication interface unit 300 , and a high voltage and threshold control unit 400 .

[0026] like figure 2 As shown, the nuclear pulse pre-processing unit 100 is composed of multiple identical parallel processing modules, each of which includes a passive filter 110 , a preamplifier 120 , and a threshold discriminator 130 . Each input nuclear pulse is first low-pass filtered through the passive filter 110 to reduce high-frequency noise and smooth the waveform, and then sent to the preamplifier 120 for amplification, and finally the amplified waveform is sent to the threshold discriminator 13...

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Abstract

The invention relates to a control device for a low-background alpha-beta measuring instrument. The device comprises a nuclear pulse pretreatment unit, an FPGA (Field Programmable Gate Array)/CPLD (Complex Programmable Logic Device)-based master control calculation unit, a communication interface unit and a high voltage and threshold control unit; the FPGA/CPLD-based master control calculation unit is respectively connected with the nuclear pulse pretreatment unit, the communication interface unit and the high voltage and threshold control unit; and high voltage and threshold control unit is connected with the nuclear pulse pretreatment unit. The control device has various characteristics such as parallel and high-speed treatment, real-time synchronous treatment on multipath signals, convenience in expansion, high integration level, capability of reducing the amount of peripheral chips and enhancing the stability and the like.

Description

technical field [0001] The invention relates to a control device, in particular to a control device for a low-background αβ measuring instrument. Background technique [0002] In the field of nuclear detection technology, the detector can convert the energy of the radiation (particle beam) into a fast electronic signal through the interaction with the working medium (such as generating photons or electrons, etc.), and then preprocessed by the front-end electronics part. Including pre-amplification, filter shaping, screening or sampling, converting into digital signals, and then sending them to the controller part (CPU or MCU) for calculation, analysis or recording. The controller part usually also needs to communicate with the host computer, interactive instructions and data, followed by threshold or sampling control of the discriminator and high voltage control of the detector. [0003] In the traditional low-background α, β measuring instrument of this type, the circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042G01T1/00
Inventor 张博张晶陈阳秦家宝
Owner 湖北方圆环保科技有限公司
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