Avalanche photodetector signal compensation device and method

An avalanche photoelectric and signal compensation technology, which is applied in the detection of fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. It can solve problems such as increasing the overall volume of the system, increasing system risk points, and complex control methods.

Inactive Publication Date: 2012-06-27
YANTAI RAYTRON TECH
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main ways to solve this problem. One is to place the avalanche photodetector in a constant temperature system, but this method needs to introduce a constant temperature system, the control method is complicated, and the risk points of the system are increased. It also greatly increases the overall volume of the system, which is greatly limited; another method is to use a temperature sensitive resistor to compensate the voltage of the avalanche photodetector when the ambient temperature changes, and control the gain of the avalanche photodetector to remain unchanged, but the gain of the avalanche photodetector is affected by the The influence of temperature and voltage is nonlinear. After strict adjustment, this method can meet the requirements in a small temperature range, but in the range of minus 5 to 50 ° C, the gain of the avalanche photodetector still has a large change

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Avalanche photodetector signal compensation device and method
  • Avalanche photodetector signal compensation device and method
  • Avalanche photodetector signal compensation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] See attached Figures 1 to 3 , the present invention includes a digital temperature sensor 8, an avalanche photodetector (APD) 7 that converts optical signals into electrical signals, a voltage integrated control module 2 that implements closed-loop control on voltage, and an external E2PROM 1 for data storage, which is characterized in that : The digital temperature sensor 8 and the avalanche photodetector (APD) 7 are clamped in an aluminum heat sink fixture; the digital temperature sensor 8 converts the real-time temperature information of the avalanche photodetector (APD) 7 into a digital signal The signal is sent to the integrated voltage control module 2, and the integrated voltage control module 2 outputs a voltage signal to an avalanche photodetector (APD) 7, and data access is performed between the integrated voltage control module 2 and the external E2PROM 1.

[0019] The voltage integrated control module 2 includes a microcontroller 3, an analog-to-digital con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an avalanche photodetector signal compensation device and a method, which belong to the field of distribution type optical fiber sensing. By the aid of a hardware detection controller based on negative feedback, the avalanche photodetector signal compensation device comprises a digital temperature sensor, a voltage comprehensive control module, an external E2PROM (electrically erasable programmable read-only memory) and an avalanche photodetector (APD), and adopts a non-linear curve fitting data calculating method to accurately compensate response nonlinearity of the avalanche photodetector (APD), so that gain of the avalanche photodetector (APD) keeps constant within a wide temperature range (from minus 5 DEG C to 50 DEG C), and measurement precision and stability of a distribution type optical fiber sensor within the wide temperature range are improved greatly.

Description

technical field [0001] The invention relates to an avalanche photodetector signal compensation device and method, belonging to the field of distributed optical fiber sensing. Background technique [0002] The avalanche photodetector (APD) is a key component in the distributed optical fiber sensor system that converts optical signals into electrical signals. The gain stability of the avalanche photodetector directly affects the performance index and stability of the system; but the gain of the avalanche photodetector Due to the double influence of the working environment temperature and the voltage applied to the avalanche photodetector, in order to keep the gain of the avalanche photodetector constant, the voltage value applied to it must be precisely changed when the ambient temperature changes. There are two main ways to solve this problem. One is to place the avalanche photodetector in a constant temperature system, but this method needs to introduce a constant temperatur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/50
Inventor 靳占军霍佃恒张勇张永庆马宏
Owner YANTAI RAYTRON TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap