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Reference and measurement integrated difunctional photoelectric detector and detection system

A photodetector, dual-function technology, used in measurement devices, color/spectral characteristic measurement, instruments, etc., can solve the problems of poor reliability, high cost, large size, etc., to improve stability and reliability, reduce volume and Weight, cost reduction effect

Inactive Publication Date: 2020-10-30
席金波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The detection sensitivity has low stability and poor reliability
Devices are mostly connected by optical fiber quick connectors or optical fiber fusion splicing. The quality of the connection cannot be adjusted actively, that is, the light reflection generated after the connection cannot be actively eliminated. Therefore, the more connectors, the return loss caused by the optical system link. The larger is, the lower the stability of the gas concentration detection sensitivity is, and the greater the zero point fluctuation is;
[0007] 2. Large volume and high cost
These separate devices are all single-function devices, and the active devices and passive devices are connected through optical fiber quick connectors, resulting in a large volume of the entire system, which limits the application in portable instruments and other fields, and is expensive

Method used

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  • Reference and measurement integrated difunctional photoelectric detector and detection system
  • Reference and measurement integrated difunctional photoelectric detector and detection system
  • Reference and measurement integrated difunctional photoelectric detector and detection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment one, as figure 1 As shown, a dual-function photodetector integrated with reference and measurement includes a reference photodetector 1, a measurement photodetector 2 and a splitting fiber collimator 3; the reference photodetector 1 is provided with a reference gas chamber , and the reference gas chamber is filled with the measured gas;

[0058] The splitting fiber collimator 3 includes a light incident joint 31, a parallel light output head 32, a reflected light output head 33 and an optical fiber assembly 34;

[0059] The parallel light output head 32 is respectively connected to the optical path of the light incident joint 31 and the reflected light output head 33 through the optical fiber assembly 34; the reference photodetector 1 is connected to the optical path of the parallel light output head 32, The measuring photodetector 2 is connected with the reflected light output head 33 in an optical path.

[0060] The working principle of the dual-function ...

Embodiment 2

[0073] Embodiment 2. On the basis of Embodiment 1, a dual-function photodetector integrating reference and measurement is provided, such as figure 2 As shown, the reference photodetector 1 also includes a first ceramic transition block 16;

[0074] The first ceramic transition block 16 is fixed on the first TO tube seat 13, and a first angle is formed between the upper end surface of the first ceramic transition block 16 and the first TO tube seat 13; The first photosensitive element 11 is fixed on the upper end surface of the first ceramic transition block 16;

[0075] and / or,

[0076] Such as image 3 As shown, the measurement photodetector 2 also includes a second ceramic transition block 26;

[0077] The second ceramic transition block 26 is fixed on the second TO tube seat 23, and a second angle is formed between the upper end surface of the second ceramic transition block 26 and the second TO tube seat 23; The second photosensitive element 21 is fixed on the upper...

Embodiment 4

[0104] Embodiment 4. On the basis of Embodiment 1 to Embodiment 3, a dual-function photodetector integrating reference and measurement is provided, such as Figure 5 As shown, the reflected light output head 33 includes an optical fiber ceramic ferrule 331 and a second pagoda sleeve structure 332;

[0105] The fiber optic ceramic ferrule 331 is arranged inside the second pagoda sleeve structure 332, and the fiber optic ceramic ferrule 331 is socketed together with the second pipe body 20 through the second pagoda sleeve structure 332 ; The parallel light output head 32, the optical fiber assembly 34, the fiber optic ceramic ferrule 331 and the second photosensitive element 21 are sequentially connected in an optical path.

[0106] The fiber optic ceramic ferrule is set inside the second pagoda sleeve structure, and then through the second pagoda sleeve structure, the entire reflected light output head and its internal structure are welded together with the measuring photodetec...

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Abstract

The invention relates to a reference and measurement integrated bifunctional photoelectric detector and a detection system. The reference and measurement integrated bifunctional photoelectric detectorcomprises a reference photoelectric detector, a measurement photoelectric detector and a light splitting optical fiber collimator, the reference photoelectric detector is internally provided with a reference gas chamber, and the reference gas chamber is filled with detected gas; the light splitting optical fiber collimator comprises a light incident connector, a parallel light emitting head, a reflected light emitting head and an optical fiber assembly. The parallel light emitting head is connected with the light incident connector and the reflected light emitting head through the optical fiber assembly. The reference photoelectric detector is connected with the parallel light emitting head through a light path, and the measurement photoelectric detector is connected with the reflected light emitting head through a light path. According to the invention, the photoelectric detector with a reference function, the photoelectric detector with a measurement function and the optical splitter with a light splitting function are integrated, so that the volume and the weight of the whole detection system are greatly reduced, the stability and the reliability of gas detection sensitivity are improved, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a dual-function photodetector and a detection system integrating reference and measurement. Background technique [0002] The gas content real-time online detection system based on TDLAS (Tunable Semiconductor Laser Absorption Spectroscopy) technology is a detection system that measures the content of the corresponding gas through the absorption of specific wavelength laser by gas. It is a new generation of advanced gas detection technology with high sensitivity and fast response. This technology has high measurement accuracy, up to ppm (one millionth) level; high accuracy, can detect specific component gases in the mixed gas; fast response speed, up to millisecond response level; using optical detection, Anti-jamming and explosion-proof features, can be used for flammable and explosive gas detection. [0003] In the real-time on-line detection system of gas content based on TDLAS ...

Claims

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Application Information

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IPC IPC(8): G01N21/39G01N21/01
CPCG01N21/01G01N21/39G01N2021/0112
Inventor 宋子毅
Owner 席金波
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