CN203414407U - Reflective open circuit laser gas detecting system - Google Patents
Reflective open circuit laser gas detecting system Download PDFInfo
- Publication number
- CN203414407U CN203414407U CN201320412684.7U CN201320412684U CN203414407U CN 203414407 U CN203414407 U CN 203414407U CN 201320412684 U CN201320412684 U CN 201320412684U CN 203414407 U CN203414407 U CN 203414407U
- Authority
- CN
- China
- Prior art keywords
- laser
- circuit
- signal
- main road
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a reflective open circuit laser gas detecting system. The system comprises an MCU (Microprogrammed Control Unit) processing circuit provided with an A/D converter, a signal generating circuit, a laser, a main-path light beam shaping mechanism, a space angle reflecting mirror, a main-path detector and a signal amplifying circuit, wherein the MCU processing circuit is connected with the signal generating circuit; the signal generating circuit is connected with the laser; the main-path detector is connected with the A/D converter of the MCU processing circuit through the signal amplifying circuit; the laser is arranged in the position opposite to the laser incident end of the main-path light beam shaping mechanism; the main-path detector is arranged in the position opposite to the laser emitting end of the main-path light beam shaping mechanism through the space angle reflecting mirror. When the reflective open circuit laser gas detecting system is used, an emitting unit and a receiving unit can be arranged together as the emitting end due to the effect of the space angle reflecting mirror; the emitting unit and the receiving unit share one MCU processing circuit, so that the synchronism, the instantaneity and the cooperativity are largely improved.
Description
Technical field
The utility model relates to reflective open circuit laser gas detection system.
Background technology
Along with industrialization and the economic develop rapidly of the marketization, energy demand is increased severely.Annual Natural Gas In China output in 2012 increases by 6.5% on a year-on-year basis and reaches 1077 billion cubic meters, through measuring and calculating, environment measuring in exploitation, processing and conveying process, reaches more than 500,000 the newly-increased annual requirement of the gas inspection checkout equipments such as methane, and with annual 20% to 30% speed increment.In the exploitation of oil gas, collect in defeated process, various forms of leakages will have a strong impact on atmospheric environment and people life property safety.Due to the backwardness of detection technique and management level, accident often has generation, not only economy is caused to huge loss, has also caused bad social influence, and environment has been caused to pollution.Methane is the main combustible component of rock gas, is again a kind of potent greenhouse gases simultaneously, and the greenhouse effect of methane are more than 20 times of carbon dioxide, are the greenhouse gases that can cause global warming for No. second that are only second to carbon dioxide in earth atmosphere.For fear of environmental pollution and minimizing greenhouse effect, guarantee safe production and social stability, detecting hazardous location Leakage Gas must go really, in the existing various systems that detect for detection of hazardous location gas inspection concentration, wherein a kind of is open circuit methane laser gas detection system, this system comprises transmitter unit and receiving element, transmitter unit comprises MCU treatment circuit, signal generating circuit, laser instrument, main road beam shaping mechanism and power circuit, receiving element comprises the lens that converge laser, main road detector, signal amplification circuit, MCU treatment circuit and signal output apparatus, MCU treatment circuit is controlled laser instrument by signal generating circuit and is sent laser, main road beam shaping mechanism carries out directive receiving element after shaping to laser, after laser scioptics, by main road detector, received, convert light signal to electric signal, then after signal being amplified by signal amplification circuit, by MCU treatment circuit, process calculating, draw the accumulative total concentration of gas and export by signal output apparatus, once methane gas exceeds standard, controlling warning horn and report to the police.But this open circuit methane gas detection system exists some shortcomings, the first, transmitter unit and receiving element are used respectively independently MCU treatment circuit, and synchronism, real-time and concertedness are not high, affect testing result; The second, due to the impact of various factors, often there is certain centre wavelength drift phenomenon in the laser that MCU treatment circuit sends by signal generating circuit drive laser, and measurement result is had a negative impact, and when serious, cause and measure unsuccessfully.
Utility model content
The purpose of this utility model is to provide reflective open circuit laser gas detection system, to solve that transmitter unit and receiving element in existing system are used respectively MCU processor and the synchronism, real-time and the concertedness that produce are not high, affects the problem of testing result.
To achieve these goals, the technical scheme that the utility model adopts is: reflective open circuit laser gas detection system, it comprises MCU treatment circuit, signal generating circuit, laser instrument, main road beam shaping mechanism, Space Angle catoptron, main road detector and the signal amplification circuit with A/D converter
Described MCU treatment circuit connects described signal generating circuit to produce and to realize gas centre wavelength to be measured and scan required modulation signal, and described signal generating circuit connects described laser instrument to sent and realized gas centre wavelength to be measured and scan required laser by described laser instrument according to modulation signal;
Described main road detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration signal to be measured through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit;
The sharp light incident side setting of the corresponding described main road beam shaping of described laser instrument mechanism, described main road detector arranges by the laser emitting end of the corresponding described main road beam shaping of described Space Angle catoptron mechanism.
Based on above-mentioned, it also comprises optical branching device, reference beam reshaping device, sealed air chamber, be stored in described sealed air chamber and gas to be measured and the reference detector of known gas concentration;
Described reference detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration reference signal to be measured and made described MCU treatment circuit according to the generation of relatively adjusting described modulation signal of described gas concentration reference signal to be measured and described known gas concentration through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit;
The input end setting of the corresponding described optical branching device of described laser instrument, two output terminals corresponding described main road beam shaping mechanisms of difference of described optical branching device and the sharp light incident side setting of described reference beam reshaping device, the laser emitting end of described reference beam reshaping device is corresponding described sealed air chamber, described reference detector setting successively.
Based on above-mentioned, described Space Angle catoptron by a plurality of be arranged in parallel for the refractive prism of the parallel ejaculation of incident light is formed.
Based on above-mentioned, it also comprises angular adjustment apparatus, and described Space Angle catoptron is located on described angular adjustment apparatus.
Based on above-mentioned, it also comprises with reference to adjusting gear, and described reference beam reshaping device, described sealed air chamber and described reference detector are located at described with reference on adjusting gear.
When the utility model is used, laser reflexes on main road detector through Space Angle catoptron, and main road detector connects the A/D converter of MCU treatment circuit to the electric signal detecting is exported to gas concentration signal to be measured through amplifying the backward described MCU treatment circuit of processing by signal amplification circuit; Effect due to Space Angle catoptron, together with transmitter unit can be located at receiving element as transmitting terminal, Space Angle catoptron is as reflection end, greatly reduced the volume of device, again because transmitter unit and receiving element share a MCU treatment circuit, synchronism, real-time and concertedness are improved greatly, testing result precision is improved.
Further, reference detector receiving optical signals, and connecting the A/D converter of MCU treatment circuit to the electric signal detecting is exported to gas concentration reference signal to be measured and made described MCU treatment circuit according to the generation of relatively adjusting described modulation signal of described gas concentration reference signal to be measured and described known gas concentration through amplify processing backward described MCU treatment circuit by signal amplification circuit, object is to adjust to realize gas centre wavelength to be measured and scan required laser; Owing to existing a feedback ratio, like this when there is drift in the centre wavelength of laser, feedback information in time, MCU treatment circuit can carry out adjustment promptly and accurately, to eliminate centre wavelength drift phenomenon.
Accompanying drawing explanation
Fig. 1 is the local system figure of reflective open circuit laser gas detection system in the utility model embodiment;
Fig. 2 is the system diagram of reflective open circuit laser gas detection system in the utility model embodiment.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
The embodiment of reflective open circuit laser gas detection system
Embodiment 1
As shown in Figure 1, it comprises transmitter unit, receiving element and Space Angle catoptron, transmitter unit has the MCU treatment circuit of A/D converter, signal generating circuit, laser instrument, main road beam shaping mechanism, receiving element has main road detector and signal amplification circuit, described MCU treatment circuit connects described signal generating circuit and scans required modulation signal so that generation realizes gas centre wavelength to be measured, described signal generating circuit connects described laser instrument to sent and realized gas centre wavelength to be measured and scan required laser by described laser instrument according to modulation signal, described main road detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration signal to be measured through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit, the sharp light incident side setting of the corresponding described main road beam shaping of described laser instrument mechanism, described main road detector arranges by the laser emitting end of the corresponding described main road beam shaping of Space Angle catoptron mechanism.Space Angle catoptron by a plurality of be arranged in parallel for the refractive prism of the parallel ejaculation of incident light is formed, Space Angle catoptron is located on described angular adjustment apparatus, angular adjustment apparatus, for adjusting the angle of Space Angle catoptron, is existing apparatus, at this, does not repeat.
When the utility model is used, power circuit (not shown) is the power supply of open circuit laser gas detection system, laser reflexes on main road detector through Space Angle catoptron, and main road detector connects the A/D converter of MCU treatment circuit to the electric signal detecting is exported to gas concentration signal to be measured through amplifying the backward described MCU treatment circuit of processing by signal amplification circuit; Effect due to Space Angle catoptron, together with transmitter unit can be located at receiving element as transmitting terminal, Space Angle catoptron is as reflection end, greatly reduced the volume of device, transmitter unit and receiving element share a MCU treatment circuit, synchronism, real-time and concertedness are improved greatly, testing result precision is improved.
In other embodiment of the present utility model, as different from Example 1, Space Angle catoptron can also be existing other Space Angle reflection unit, as long as meet above-mentioned request for utilization, can in this programme, use.
Embodiment 2
As shown in Figure 2, as different from Example 1, this reflective open circuit laser gas detection system also comprises optical branching device, reference beam reshaping device, sealed air chamber, be stored in described sealed air chamber and gas to be measured and the reference detector of known gas concentration; Described reference detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration reference signal to be measured and made described MCU treatment circuit according to the generation of relatively adjusting described modulation signal of described gas concentration reference signal to be measured and described known gas concentration through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit; The input end setting of the corresponding described optical branching device of laser instrument, two output terminals corresponding described main road beam shaping mechanisms of difference of described optical branching device and the sharp light incident side setting of described reference beam reshaping device, the laser emitting end of described reference beam reshaping device is corresponding described sealed air chamber, described reference detector setting successively; Also comprise with reference to adjusting gear, reference beam reshaping device, sealed air chamber and reference detector are located at described with reference on adjusting gear; With reference to adjusting gear, be existing apparatus, at this, do not repeat.
In the course of work, reference detector receiving optical signals, and connect the A/D converter of MCU treatment circuit to the electric signal detecting is exported to gas concentration reference signal to be measured and made described MCU treatment circuit according to the generation of relatively adjusting described modulation signal of described gas concentration reference signal to be measured and described known gas concentration through amplify processing backward described MCU treatment circuit by signal amplification circuit, to adjust, realize gas centre wavelength to be measured and scan required laser; Owing to existing a feedback ratio, like this when there is drift in the centre wavelength of laser, feedback information in time, MCU treatment circuit can carry out adjustment promptly and accurately, to eliminate laser center wavelength drift phenomenon.
This reflective open circuit laser gas detection system can be used for detecting methane gas, also can be for detection of other gas, and when detecting methane gas, the centre wavelength of laser is 1.66um.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (5)
1. reflective open circuit laser gas detection system, is characterized in that: it comprises MCU treatment circuit, signal generating circuit, laser instrument, main road beam shaping mechanism, Space Angle catoptron, main road detector and the signal amplification circuit with A/D converter,
Described MCU treatment circuit connects described signal generating circuit to produce and to realize gas centre wavelength to be measured and scan required modulation signal, and described signal generating circuit connects described laser instrument to sent and realized gas centre wavelength to be measured and scan required laser by described laser instrument according to modulation signal;
Described main road detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration signal to be measured through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit;
The sharp light incident side setting of the corresponding described main road beam shaping of described laser instrument mechanism, described main road detector arranges by the laser emitting end of the corresponding described main road beam shaping of described Space Angle catoptron mechanism.
2. reflective open circuit laser gas detection system according to claim 1, is characterized in that: it also comprises optical branching device, reference beam reshaping device, sealed air chamber, be stored in described sealed air chamber and gas to be measured and the reference detector of known gas concentration;
Described reference detector connects the A/D converter of described MCU treatment circuit to the electric signal detecting is exported to gas concentration reference signal to be measured and made described MCU treatment circuit according to the generation of relatively adjusting described modulation signal of described gas concentration reference signal to be measured and described known gas concentration through amplifying the backward described MCU treatment circuit of processing by described signal amplification circuit;
The input end setting of the corresponding described optical branching device of described laser instrument, two output terminals corresponding described main road beam shaping mechanisms of difference of described optical branching device and the sharp light incident side setting of described reference beam reshaping device, the laser emitting end of described reference beam reshaping device is corresponding described sealed air chamber, described reference detector setting successively.
3. reflective open circuit laser gas detection system according to claim 1 and 2, is characterized in that: described Space Angle catoptron by a plurality of be arranged in parallel for the refractive prism of the parallel ejaculation of incident light is formed.
4. reflective open circuit laser gas detection system according to claim 1 and 2, is characterized in that: it also comprises angular adjustment apparatus, and described Space Angle catoptron is located on described angular adjustment apparatus.
5. reflective open circuit laser gas detection system according to claim 2, is characterized in that: it also comprises with reference to adjusting gear, and described reference beam reshaping device, described sealed air chamber and described reference detector are located at described with reference on adjusting gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320412684.7U CN203414407U (en) | 2013-07-12 | 2013-07-12 | Reflective open circuit laser gas detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320412684.7U CN203414407U (en) | 2013-07-12 | 2013-07-12 | Reflective open circuit laser gas detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203414407U true CN203414407U (en) | 2014-01-29 |
Family
ID=49977289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320412684.7U Withdrawn - After Issue CN203414407U (en) | 2013-07-12 | 2013-07-12 | Reflective open circuit laser gas detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203414407U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398976A (en) * | 2013-07-12 | 2013-11-20 | 河南汉威电子股份有限公司 | Reflection type open circuit laser gas detection system |
| CN107356541A (en) * | 2017-07-21 | 2017-11-17 | 安徽庆宇光电科技有限公司 | Soot gas monitor optical scanning system |
-
2013
- 2013-07-12 CN CN201320412684.7U patent/CN203414407U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398976A (en) * | 2013-07-12 | 2013-11-20 | 河南汉威电子股份有限公司 | Reflection type open circuit laser gas detection system |
| CN103398976B (en) * | 2013-07-12 | 2015-12-16 | 河南汉威电子股份有限公司 | Reflective open circuit laser gas detection system |
| CN107356541A (en) * | 2017-07-21 | 2017-11-17 | 安徽庆宇光电科技有限公司 | Soot gas monitor optical scanning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103398976B (en) | Reflective open circuit laser gas detection system | |
| CN103344614B (en) | A kind of atmospheric transmissivity at high precision measurement mechanism and measuring method | |
| CN102692725B (en) | System and method for improving laser collimation precision by utilizing optical phase conjugation principle | |
| CN100460860C (en) | Portable infrared semiconductor laser absorbing type gas detection method and detection apparatus therefor | |
| CN107992085A (en) | Laser telemetry hazardous gas automatic tour inspection system and automatic detecting method based on unmanned plane | |
| CN104596645A (en) | Completely-polarized multi-angle scattering simulation and testing system for complex environment | |
| CN101619807A (en) | System and method for monitoring airborne natural gas line leakage | |
| CN203414407U (en) | Reflective open circuit laser gas detecting system | |
| CN103760115A (en) | Onboard near-infrared CO2 vertical pillar concentration telemetering equipment | |
| CN105043726A (en) | Method and testing apparatus for detecting influences of return light of laser on laser | |
| CN206671566U (en) | A kind of multi-wavelength polarizes Raman laser radar system | |
| CN206818876U (en) | Ozone sounding Difference Absorption quantum laser radar installations based on single Raman pipe | |
| CN207729254U (en) | Leakage detection system in gas for underground pipe gallery | |
| CN107421904B (en) | Sulfur hexafluoride gas leakage online monitoring system based on differential absorption laser trolley | |
| CN107064058B (en) | Shale gas leakage multiple gas online monitoring device and method | |
| CN202994656U (en) | Open circuit laser methane gas detection system | |
| CN202469497U (en) | Leakage point detection positioning system for gas pipe | |
| CN112362546B (en) | High-precision multiband portable particulate matter mass concentration measuring instrument | |
| CN204536199U (en) | Solar powered open light path natural gas leaking monitoring system | |
| CN203587065U (en) | A follow-up stabilizing apparatus angle precision measurement device | |
| CN211206225U (en) | Laser gas detection equipment | |
| CN204732671U (en) | A kind of laser diode | |
| CN203908935U (en) | Automatic calibration device for laser-type extinction smoke meter | |
| CN203479698U (en) | Handheld gas sensing system based on optical remote sensing camera | |
| CN102998282A (en) | Open circuit laser methane gas detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20151216 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |