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Power supply and nuclear signal detection device for sipm tube bias voltage

A technology of bias voltage and power supply, applied in the field of nuclear detection equipment, to solve the stability problem

Active Publication Date: 2021-06-29
中国兵器装备集团自动化研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the technical problem of poor stability of the bias voltage of the existing SiPM tube, the present invention provides a power supply for the bias voltage of the SiPM tube that solves the above problems. Boost the initial voltage, by introducing a real-time SiPM tube gain automatic correction circuit to achieve precise and stable control of the output of the boost power supply circuit, thus solving the stability problem based on the SiPM tube array detector, meeting the requirements of using SiPM tubes for nuclear signal detection and nuclide identification

Method used

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  • Power supply and nuclear signal detection device for sipm tube bias voltage

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Embodiment 1

[0027] This embodiment proposes a power supply for SiPM tube bias voltage, such as figure 1 As shown, the power supply includes a continuously adjustable boost circuit and a real-time SiPM tube gain automatic correction circuit; the continuously adjustable boost circuit uses a two-stage voltage parallel negative feedback closed-loop adjustable boost circuit to generate the bias voltage of the SiPM tube; The real-time SiPM tube gain automatic correction circuit receives the required gain amount and characteristic parameters of the SiPM tube, and adjusts the bias voltage of the SiPM tube generated by the continuously adjustable boost circuit in real time according to the ambient temperature of the SiPM tube collected in real time, thereby realizing the SiPM tube gain. Gain is automatically corrected.

[0028]In this embodiment, the continuously adjustable boost circuit uses a voltage regulator, a planar transformer and a noise reducer to implement a two-stage voltage parallel ne...

Embodiment 2

[0035] This embodiment 2 provides that the power supply for the SiPM tube bias voltage proposed in the above embodiment is implemented on the nuclear signal detection device. The output voltage of the power supply is continuously adjustable from 30VDC to 90VDC, the noise is not greater than 0.1mVp-p, and the adjustment resolution The rate is not greater than 5mV; the SiPM tube gain automatic correction circuit receives the required gain and characteristic parameters of the SiPM tube through the CAN bus, and collects and tracks the ambient temperature of the SiPM tube and the output voltage of the booster circuit (SiPM bias voltage) in real time, using PID The control technology automatically corrects the gain of the SiPM tube, and the maximum gain drift of the SiPM tube is less than 0.1% at an ambient temperature of -20°C to 60°C. Therefore, the stability problem based on the SiPM tube array detector is realized, and the SiPM tube is used for nuclear signal detection and nuclid...

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Abstract

The invention discloses a power supply and a nuclear signal detection device for the bias voltage of SiPM tubes. The power supply includes a continuously adjustable boost circuit and a real-time SiPM tube gain automatic correction circuit; the continuously adjustable boost circuit adopts two-stage voltage parallel connection The negative feedback closed-loop adjustable boost circuit generates the bias voltage of the SiPM tube; the real-time SiPM tube gain automatic correction circuit receives the required gain amount and characteristic parameters of the SiPM tube, and adjusts continuously in real time according to the ambient temperature of the SiPM tube collected in real time. Adjust the bias voltage of the SiPM tube generated by the step-up circuit, so as to realize the automatic correction of the SiPM gain. The invention adopts a two-stage voltage parallel negative feedback closed-loop adjustable boost circuit to complete the initial voltage boost, and realizes accurate and stable control of the output of the boost power supply circuit by introducing a real-time SiPM tube gain automatic correction circuit, which meets the requirements of using a SiPM tube as a core. Signal detection and nuclide identification.

Description

technical field [0001] The invention relates to the technical field of nuclear detection equipment, in particular to a power supply for SiPM tube bias voltage and a nuclear signal detection device. Background technique [0002] Silicon photomultiplier tube (SiPM) is a photodetector device used in PET (Positrom Emission Tomography), which mainly performs photoelectric conversion and amplification of nuclear signals. Its advantages are small size, low operating voltage, low power consumption, and no resistance to magnetic fields. Sensitivity and other advantages, but its disadvantage is that the gain is very sensitive to the ambient temperature, and the ripple and precision of its bias voltage are extremely high. Therefore, it is one of the key technologies to use the SiPM tube to detect the bias voltage accuracy and stability of the nuclear signal and the automatic gain correction of the SiPM tube. At present, there is no dedicated SiPM bias voltage power supply, and an ordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/24
CPCG01T1/248
Inventor 唐恭富李进廖鹏姚飞
Owner 中国兵器装备集团自动化研究所有限公司