Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Laser remote sensing detector for natural gas concentration and distance

A detection device, natural gas technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of phase change, error, inconsistency, etc., to achieve the effect of improving accuracy and eliminating phase inconsistency

Active Publication Date: 2017-01-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of using the ratio of the residual amplitude of the second harmonic signal to the first harmonic signal to eliminate the influence of light intensity can also achieve some effects, but because the demodulation of the second harmonic signal and the first harmonic signal are different The lock-in amplifier, the phase information of the two lock-in amplifiers is not consistent, and the distance of the remote sensing detection technology is changed in the actual application, which causes the phase to change to a certain extent, which will cause the use of the second harmonic There is a large error in eliminating the influence of light intensity fluctuations by using the ratio of the wave signal to the residual amplitude of the first harmonic signal

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
  • Laser remote sensing detector for natural gas concentration and distance
  • Laser remote sensing detector for natural gas concentration and distance
  • Laser remote sensing detector for natural gas concentration and distance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The preferred modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] see figure 1 , the composition of the laser remote sensing detection device for natural gas concentration and distance is as follows:

[0024] The device includes an electrically connected infrared laser emitting part, an infrared laser receiving part and a control processing part; wherein,

[0025] The infrared laser emitting component is a laser 7, an optical fiber 8, and a fiber collimator 9 located at the center of the scattered light collection lens 10 connected in sequence; the laser 7 is a diode laser (or quantum cascade laser, or OPO laser).

[0026] The infrared laser receiving components are a scattered light collecting lens 10 and a detector 14 located at the focal point of the scattered light collecting lens 10 .

[0027] The control processing component includes an electrically connected transmit signal control com...

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 discloses a laser remote sensing detector for natural gas concentration and distance. The detector comprises infrared laser transmitting and receiving components and a control processing component electrically connected with the infrared laser transmitting and receiving components; particularly, the control processing component comprises a transmitting signal control assembly and a receiving signal processing assembly which are electrically connected; the transmitting signal control assembly is used for achieving modulation of output of a laser (7) in the infrared laser transmitting component; the receiving signal processing assembly comprises a distance signal processing unit and a concentration signal processing unit which are electrically connected with a detector (14) in the infrared receiving component, wherein the distance signal processing unit is used for working out the distance between a reflector (12) and the infrared receiving component, and the concentration signal processing unit is used for working out the gas concentration. The detector has the high precision for natural gas concentration detection, and can be widely applied to accurate positioning and detection of natural gas leakage.

Description

technical field [0001] The invention relates to a laser remote sensing detection device, in particular to a laser remote sensing detection device for natural gas concentration and distance. Background technique [0002] With the continuous expansion of natural gas consumption, my country has built hundreds of thousands of kilometers of natural gas pipelines. For such a long natural gas pipeline network, leakage is inevitable in the process of natural gas transportation, storage, and sales management, and it is also the main cause of safety accidents. Therefore, in order to find the leakage point in time, people have developed the laser remote sensing detection technology for natural gas leakage. However, when this technology detects natural gas leaks, due to the received scattered light depending on the reflector, the return light power varies greatly, and the demodulated second harmonic signal is proportional to the light intensity, so that the measurement results accurac...

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
IPC IPC(8): G01N21/17
Inventor 高晓明梅教旭汪磊谈图
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com