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Multichannel pulse size analyzer based on peak sensing

A technique of amplitude analysis and multi-channel pulse, which is applied in X-ray energy spectrum distribution measurement and other directions, can solve the problems of large instrument dead time, easy missing pulse data, high price and promotion, etc., to simplify the peak processing process, and the circuit is simple and reliable , the effect of small dead time of the instrument

Inactive Publication Date: 2010-10-06
罗康林
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing multi-channel pulse amplitude analyzers often use the peak hold method to measure the pulse peak amplitude, but the charging and discharging of the capacitor takes a lot of time, so it is easy to miss the pulse data and has a large dead time of the instrument
Or increase the hardware cost and use various means to make up for the dead time defects, but this will make the maintenance of the instrument difficult, and it is difficult to promote because of the high price

Method used

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  • Multichannel pulse size analyzer based on peak sensing
  • Multichannel pulse size analyzer based on peak sensing
  • Multichannel pulse size analyzer based on peak sensing

Examples

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Embodiment Construction

[0017] Below we will further illustrate the invention in conjunction with the accompanying drawings

[0018] like figure 1 , a multi-channel pulse amplitude analyzer based on peak detection, including a peak detection circuit (1), an AD conversion circuit (2), a counting accumulator (3) and a timing controller (4).

[0019] like figure 2 , the peak detection circuit (1) is a voltage comparator circuit based on diode clamping. When the pulse signal enters the rising edge, the capacitor C1 is charged by the diode D1, Vin>Vc1, the comparator outputs a high level; when the pulse enters the falling edge, D1 is cut off, then D2 is turned on, C1 is discharged, Vin<Vc1, the comparator A flip occurs and a falling edge signal is output. The ingenuity of the circuit is that the two diodes can provide enough voltage difference for the stable operation of the comparator.

[0020] like image 3 , the AD conversion circuit (2) selects AD7492AR as the AD conversion chip, and starts conv...

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Abstract

The invention relates to a voltage pulse peak amplitude analyzer which comprises a peak sensing circuit, an AD conversion circuit, a counting accumulation circuit and a time sequence control circuit. A capacitive voltage follower of the peak sensing circuit comprises a bidirectional switch diode group and a miicromicro farad capacitor, and has high response speed. Tests prove that the circuit can be used for continuously sensing waveforms with a certain failing edge and the frequency below 350kHz, such as a sine wave, a sawtooth wave and the like, has no requirements for waveform leading edge time, and is especially suitable for measuring a nuclear pulse signal. The analyzer simplifies the peak treating process, and has simple and reliable circuit, cost saving and convenient popularization.

Description

technical field [0001] The invention relates to a voltage pulse peak amplitude analysis instrument, in particular to a multi-channel pulse amplitude analysis instrument for radioactivity analysis or pulse peak measurement with a frequency not higher than 350KHz and a certain falling edge. Background technique [0002] In the field of nuclear technology research and application, it is often necessary to measure the energy spectrum of the ray. It classifies the pulse signal according to the magnitude of the amplitude and records the number of each type of signal, and draws the obtained data into a spectrum graph for specific analysis. The type of radiation and the intensity of the radiation. The nuclear radiation signal has strong randomness and complex waveform. After passing through the multi-pole signal processing circuit, the rising edge of the signal sent to the multi-channel pulse amplitude analyzer is extremely small and the frequency is high. The instrument needs to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36
Inventor 罗康林汪超杨晓东
Owner 罗康林
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