Portable high-speed multi-channel energy spectrometer

A portable energy spectrometer technology, which is applied in the direction of material analysis by measuring secondary emissions, can solve the problems of small integral nonlinearity and high input frequency, and achieve the effects of easy interaction, expanded application range, and convenient operation

Inactive Publication Date: 2009-06-24
DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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Problems solved by technology

[0004] Aiming at the defects of the existing multi-channel energy spectrometer, the present invention proposes a

Method used

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  • Portable high-speed multi-channel energy spectrometer
  • Portable high-speed multi-channel energy spectrometer
  • Portable high-speed multi-channel energy spectrometer

Examples

Experimental program
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Embodiment Construction

[0013] The block diagram of the portable fast multi-channel energy spectrometer circuit is as follows: figure 1 As shown, its principle and structure will be described in detail below in conjunction with the schematic diagram.

[0014] The pulse signal output end of the probe is connected to the input end of the pulse shaping unit 1 circuit, and the received pulse signal is input to the pulse shaping unit 1 .

[0015] Pulse shaping: The appearance of nuclear pulses is random in time, and even two pulses are very close to each other, and the amplitudes may be superimposed. On the other hand, the nuclear pulse itself contains extremely high-frequency components, and it is difficult to perform peak detection and sample-holding on it. Therefore, high frequency components and low frequency components need to be filtered out. In the pulse shaping unit 1 circuit, IC01 (ad8011) and IC02 (ad8011) operational amplifiers are used to form a filter circuit, such as figure 2 shown.

[...

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Abstract

The invention provides a device for using rays to detect elements. The device is characterized in that a pulse signal input terminal is connected with a pulse shaping unit circuit; the output terminal of the pulse shaping unit circuit is connected in parallel with an uniform path unit circuit and a threshold detecting unit circuit; the output terminal of the uniform path unit circuit and the output terminal of the threshold detecting unit circuit are connected with a peak value sample-holding unit circuit separately; the output terminal of the peak value sample-holding unit circuit is connected with a singlechip which is connected with a memorizer; and a communication unit is connected with the output interface of the singlechip. By adopting the high speed A/D conversion technology, the pulse peak voltage detecting and holding technology, a high speed linear gate circuit and a complete machine logic control system in the circuit, the invention ensures that integral nonlinear index attains 0.025%, the maximum output frequency exceeds 30kHz, the collection period is shortened, the range of application is expanded, the Chinese interface of application software is more convenient to be operated, and the interaction between data output and other application programs is facilitated.

Description

technical field [0001] The invention relates to an element detection device, in particular to a device for detecting elements by using radiation. Background technique [0002] Nuclear detection technology is more and more widely used in industry, military and other fields. With the development of nuclear detection technology, energy spectrum measurement technology has become the dominant method of nuclear detection technology. The nuclear pulses produced by each substance under the irradiation of rays of a certain wavelength have certain rules. The multi-channel energy spectrum analyzer analyzes the energy spectrum of various rays and quantifies the amplitude of the nuclear pulses excited by various rays. Data on the distribution of nuclear pulses with energy are obtained. By analyzing the energy spectrum data, it can be known that the tested object contains a certain element (such as for the detection of drugs and explosives) and the content of various elements in the mea...

Claims

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Application Information

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IPC IPC(8): G01N23/22
Inventor 白纯信美华单淑娟苏映新崔祜林赵健李士伟刘士丹李勇张华吕国峰
Owner DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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