Pure-vacuum working-gas-free ultraviolet detector

An ultraviolet detector and working gas technology, applied in the field of ultraviolet detectors, can solve the problems of unstable detection performance of ultraviolet detectors, poor sensitivity of ultraviolet detectors, etc.

Pending Publication Date: 2020-11-27
SICHUAN TIANWEI ELECTRONICS
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a pure vacuum ultraviolet detector without working gas, which solves the problem that the existing ultraviolet detector has poor sensitivity and causes unstable detection performance of the ultraviolet detector

Method used

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  • Pure-vacuum working-gas-free ultraviolet detector

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Embodiment 1

[0019] A pure vacuum ultraviolet detector without working gas comprises an ultraviolet photoelectric tube, a cathode and an anode are arranged inside the ultraviolet photoelectric tube, and an electron multiplier is installed between the cathode and the anode.

[0020] With this setting, when ultraviolet light irradiates the metal electrode of the ultraviolet photocell, due to the photoelectric effect, some free electrons in the metal electrode absorb the energy of ultraviolet photons, and the energy of these electrons will increase. Then these electrons can break away from the inside of the metal to form photoelectrons. When an electric field is applied between the electrodes of the phototube, the photoelectrons generated by the cathode move toward the electron multiplier under the action of the electric field force and enter the input end of the electron multiplier. Due to the action of the electron multiplier, a large number of electrons are output at its output end. , thes...

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Abstract

The invention discloses a pure-vacuum working-gas-free ultraviolet detector, belongs to the technical field of flame detection, aims to provide a pure-vacuum ultraviolet detector without working gas,and solves the problem of unstable detection performance of an ultraviolet detector due to poor sensitivity of the existing ultraviolet detector. The ultraviolet detector comprises an ultraviolet phototube, wherein a cathode and an anode are arranged in the ultraviolet phototube, and an electron multiplier is installed between the cathode and the anode. The invention is suitable for the pure-vacuum working-gas-free ultraviolet detector.

Description

technical field [0001] The invention belongs to the technical field of flame detection, and in particular relates to a pure vacuum ultraviolet detector without working gas. Background technique [0002] Fire has played a decisive role in the history of human evolution. It brought human beings into the civilized world, and human beings have never left fire since then. While fire brings endless benefits to mankind, it also brings disasters to mankind. Only by effectively monitoring and controlling fire with a heart of awe, can it serve mankind better. At present, the typical flame monitoring methods include temperature sensing and optical detection. Photoelectric detectors are typical representatives of optical detection methods, and they have become the mainstream method of flame monitoring due to their rapid response and stable operation. The photoelectric detector is a non-contact detection method. When detecting the flame, it responds to the ultraviolet rays in the flame,...

Claims

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Application Information

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IPC IPC(8): G01J1/42
CPCG01J1/42G01J2001/4247
Inventor 马建华李慧海朱超军曾泸王春林宗美强
Owner SICHUAN TIANWEI ELECTRONICS
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