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Temperature-constant photon counter

A photon counter and constant temperature technology, applied in the direction of instruments, temperature control, non-electric variable control, etc., can solve the problems of large volume, large influence of ambient temperature, and no constant temperature control system

Inactive Publication Date: 2017-08-29
张金祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the photomultiplier tube is greatly affected by the ambient temperature, sometimes some measurements require high dark noise. Therefore, it is an effective measure to use a semiconductor refrigeration chip with Peltier effect for constant temperature treatment. In addition, the photomultiplier tube environment electromagnetic field interference Cause unstable work, so multi-layer electromagnetic shielding should be considered
The existing device has the following disadvantages: (1) no constant temperature control system, greatly affected by ambient temperature; (2) poor shielding, greatly affected by external electromagnetic interference; (3) not compact structure, large volume

Method used

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] as attached figure 1 , figure 2 , image 3 As shown, the present invention proposes a constant temperature photon counter, which is composed of two parts, a mechanism and a circuit, and is characterized in that it is provided with a shielded darkroom, a constant temperature structure, a photon measurement structure, and a circuit board fixing structure;

[0030] Described shielding chamber is made of base 1 and front end cover 9, rear end cover 16, shielding tube 10, lens 12, socket block 13, socket plate 20 respectively fixed on the base, and shielding tube 10 is fixed on by screw On the base block 13, it passes through the constant temperature chamber 31 on the base 1, and extends into the front end cover 9 fixed on the base 1. The front end cover 9 is bonded with a lens 12, and the rear end cover 16 is fixed on the base by screws. 1, the socket board 20 i...

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Abstract

The invention relates to a temperature-constant photon counter composed of a mechanism part and a circuit part. the counter is characterized by comprising a shielding darkroom, a temperature constant structure, a circuit board fixing structure and a photon measuring structure; the shielding darkroom is composed of a pedestal, and a front end cap, a rear end cap, a shielding tube, a lens, a base block and a panel connector fixed on the pedestal; the temperature constant structure comprises a radiating fin, a fan, springs, a semiconductor cooling sheet, a conduction block and a temperature sensor; the circuit board fixing structure comprises a support plate and a partition plate fixed on the base block; and the photon measuring structure comprises a photomultiplier, a base circuit board, a power socket, a signal socket, a control circuit board, a signal processing circuit board and a high-voltage circuit board. The temperature-constant photon counter is compact in structure, small in size, narrow in temperature fluctuation, high in reliability, low in electromagnetic interference, low in dark counting and suitable for photon measuring and counting in food, medical and chemical industries.

Description

Technical field: [0001] The invention relates to the technical field of photon measuring equipment, in particular to a constant temperature photon counter especially suitable for measuring and counting photons in food, medicine and chemical industry. Background technique: [0002] Photon counters are widely used in medical, food, and chemical fields. It can be used for quantitative measurements, wavelength-specific photon testing, etc. Because the photomultiplier tube is greatly affected by the ambient temperature, sometimes some measurements require high dark noise. Therefore, it is an effective measure to use a semiconductor refrigeration chip with Peltier effect for constant temperature treatment. In addition, the photomultiplier tube environment electromagnetic field interference Cause unstable work, so multi-layer electromagnetic shielding should be considered. The existing device has the following disadvantages: (1) no constant temperature control system, greatly aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00G05D23/20
CPCG01J11/00G05D23/20
Inventor 张金祥
Owner 张金祥
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