CN205192940U - Gaseous telemetry unit - Google Patents
Gaseous telemetry unit Download PDFInfo
- Publication number
- CN205192940U CN205192940U CN201520950442.2U CN201520950442U CN205192940U CN 205192940 U CN205192940 U CN 205192940U CN 201520950442 U CN201520950442 U CN 201520950442U CN 205192940 U CN205192940 U CN 205192940U
- Authority
- CN
- China
- Prior art keywords
- gas
- light
- light beam
- remote measurement
- measurement device
- 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.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a gaseous telemetry unit, gaseous telemetry unit includes light source, first detector and treater, further include: the beam splitting device, the beam splitting device be used for with measure first light beam of optical tapoff and second light beam, first light beam passes the region of awaiting measuring, light bias rotary die piece, light bias rotary die piece is used for changing the advancing direction of first light beam, gaseous pond, the second light beam passes gaseous pond, gaseous pond holds the known gas of concentration, measurement light wavelength that an only light source sent covers the absorption lines of the known gas of concentration in await measuring gas, the gaseous pond, the second detector, the second detector is used for passing the second light beam in gaseous pond converts the second signal of telecommunication into to convey the treater. The utility model has the advantages of high accuracy, simple structure, with low costs.
Description
Technical field
The utility model relates to photoelectric analysis, particularly relates to gas remote measurement device.
Background technology
Rock gas is a kind of flammable explosive gas, and its principal ingredient is methane, and explosion limits is 5%-16%.The explosion accident caused because of fuel gas pipeline leakage throughout the country in recent years happens occasionally, and causes huge threat to the security of the lives and property of resident.For this reason, gas company needs to carry out regular safety check and irregularly selective examination to the leakage situation of the indoor natural gas facility of natural gas user.
Laser telemeter is the device using natural gas leaking in partition window telemetry building widely at present, telegauge adopts Wavelength modulation spectroscopy (WMS) technology, ultimate principle is: laser frequency be fixed near a certain absorption peak of methane, cosine modulation is carried out to laser frequency simultaneously, correlativity according to frequency modulation (PFM) harmonic signal and gas concentration detects, thus obtains the gas information to be measured on light path.The type telegauge has many deficiencies, as:
1. can there is certain drift because laser center wavelength varies with temperature, the error of gas concentration measurement can be caused;
2. cannot be used for the detection of each layer indoor gas in building.For the indoor remote measurement with window, prior art cannot determine the distance of windowpane to metope, also namely cannot obtain indoor gas content;
For the detection of the indoor gas of building more than two layers, existing telegauge is helpless;
3., due to the obstruct of glass, incoming laser beam can produce folded light beam 1 and folded light beam 2 at the interface, both sides of glass pane, can form interference on the detector, greatly reduce the accuracy of detection to gas characteristic absorption peak between folded light beam.
Utility model content
For solving the deficiency in above-mentioned prior art, the gas remote measurement device that the utility model provides the high and low cost of a kind of precision, application is wide, function is strong.
The purpose of this utility model is achieved through the following technical solutions:
Gas remote measurement device, described gas remote measurement device comprises light source, the first detector and processor; Described gas remote measurement device comprises further:
Beam splitting device, the measurement light that described beam splitting device is used for described light source to send separates the first light beam and the second light beam, and described first light beam is through region to be measured;
Light deflection module, described smooth deflection module is for changing the direct of travel of the first light beam;
Gas cell, described second light beam is through described gas cell, and described gas cell holds the known gas of concentration; The wavelength of the measurement light that an only light source sends covers the absorption line of the known gas of concentration in gas to be measured, gas cell;
Second detector, described second detector is used for the second light beam through described gas cell to be converted to the second electric signal, and is sent to processor.At least two range adjusters, the adjustable length of described at least two range adjusters, for adjusting the inclined degree of described web member relative to the first light beam.
According to above-mentioned gas remote measurement device, alternatively, described gas remote measurement device comprises further:
Unmanned plane, described light source, the first and second detectors, light deflection module, gas cell are arranged on described unmanned plane.
According to above-mentioned gas remote measurement device, alternatively, described smooth deflection module comprises further:
Wedge shape transmission device, described wedge shape transmission device is fixed on the side of web member, and described first light beam is through described wedge shape transmission device;
Web member, the opposite side of described web member is fixed with at least two range adjusters;
At least two range adjusters, the adjustable length of described at least two range adjusters, for adjusting the inclined degree of described web member relative to the first light beam.
According to above-mentioned gas remote measurement device, preferably, described range adjuster adopts piezoelectric.
According to above-mentioned gas remote measurement device, preferably, described light source is laser instrument.
According to above-mentioned gas remote measurement device, alternatively, described gas to be measured and the known gas of concentration are identical or different gas.
Compared with prior art, the beneficial effect that the utility model has is:
1. making laser output wavelength be locked in gas absorption peak center wavelength to be measured by arranging feedback light path, avoiding wave length shift, making measurement result more accurate;
Real-Time Monitoring is measuring the interference effect between the folded light beam of light on glass pane, after interfering the noise produced to exceed threshold value, adjust the incident angle of the first light beam on glass pane by adjusting the degree of deflection of the first light beam, thus avoid interfering, also namely ensure that accuracy of detection;
2. have scanning wavelength directly absorb (scanning DA) and Wavelength modulation spectroscopy (WMS) two kinds of mode of operations optional.Accuracy of measurement is high, and it is large to measure concentration range.
3. wide, the safety of application
Optical system be arranged on unmanned plane, unmanned plane flies to different height, thus records the content of indoor gas in different floor by remote measurement, has expanded application; Testing staff, without the need to entering indoor, ensure that the life security of testing staff;
4. powerful
The content information recorded can be sent on the communication terminal of owner in real time, even if also can know the content of indoor gas outside, finds natural gas leaking information early, gets rid of potential safety hazard.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustrating the technical solution of the utility model, and and are not intended to be construed as limiting protection domain of the present utility model.In figure:
Fig. 1 is the basic block diagram of the gas remote measurement device according to the utility model embodiment;
Fig. 2 is the basic block diagram of the light deflection module according to the utility model embodiment 2.
Embodiment
Fig. 1-2 and following description describe Alternate embodiments of the present utility model and how to implement to instruct those skilled in the art and to reproduce the utility model.In order to instruct technical solutions of the utility model, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will in scope of the present utility model.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present utility model in every way.Thus, the utility model is not limited to following Alternate embodiments, and only by claim and their equivalents.
Embodiment 1:
Fig. 1 schematically illustrates the basic block diagram of the gas remote measurement device of the utility model embodiment, and as shown in Figure 1, described gas remote measurement device comprises:
Light source, as laser instrument, the wavelength of the measurement light that an only light source sends covers the absorption line of gas to be measured gas as known in concentration in methane, gas cell;
Beam splitting device, as the subregion plating reflectance coating on semi-transparent semi-reflecting lens, the plane of incidence on convergent lens, described beam splitting device is used for described measurement light to separate the first light beam and the second light beam, and described first light beam is through region to be measured;
Light deflection module, as having the transmission device of the angle of wedge between light entrance face and light-emitting face, described smooth deflection module is for changing the direct of travel of the first light beam;
Gas cell, described second light beam is through described gas cell, and described gas cell holds the known gas of concentration, gas to be measured as known in concentration or alternative gas;
First detector, described first detector is used for the first light beam through region to be measured to be converted to the first electric signal, and is sent to processor;
Second detector, described second detector is used for the second light beam through described gas cell to be converted to the second electric signal, and is sent to processor;
Processor, described processor is for adjusting the running parameter of described light source, and the drift of the wavelength that light source corresponding to described second electric signal is exported does not exceed standard; For adjusting the angle of inclination of the first relatively incident light beam of described smooth deflection module, the interference between the reflected light of the first light beam making the first electric signal corresponding on internal reflection body in region to be measured does not exceed standard.
In order to detect the content of different floor indoor gas, further, described gas remote measurement device comprises further:
Unmanned plane, as many rotor wing unmanned aerial vehicles, described light source, the first and second detectors, light deflection module, gas cell are arranged on described unmanned plane, and unmanned plane flies to different story heights, thus detect the content of different floor indoor gas.
In order to reduce the dead weight capacity of unmanned plane to improve the flying power of unmanned plane, further, described processor is arranged in Control Room or monitoring car; The electric signal of output is wirelessly sent to described processor by described first and second detectors.
The gas remote measurement method of the utility model embodiment, be also the course of work of above-mentioned gas telemetering device, described gas remote measurement method comprises the following steps:
(A1) the measurement light that light source sends is divided into the first light beam and the second light beam, and the wavelength of described measurement light covers the absorption line of the known gas of gas to be measured, concentration;
(A2) described first light beam is through light deflection module, and inject in region to be measured afterwards, the first detector is converted to the first electric signal by by the first light beam after gas absorption to be measured, and is sent to processor;
Described second light beam passes the known gas of concentration, and the second light beam of injection is converted to the second electric signal by the second detector, and is sent to processor;
(A3) processor draws the drift of described light source output wavelength according to described second electric signal, if drift exceeds standard, then adjusts the running parameter of described light source, enters step (A1); If do not exceed standard, enter step (A4);
Processor draws the interference signal between the reflected light of the first light beam on internal reflection body in region to be measured according to described first electric signal, some relating to exceeds threshold value, then adjust the angle of inclination of the first relatively incident light beam of described smooth deflection module, enter step (A1); If non-superthreshold, enter step (A4);
(A4) processor first electric signal according to spectral technique process, thus obtain the content of gas to be measured.
In order to expand the sensing range of gas concentration, alternatively, in step (A4), the direct absorption spectroscopy techniques of processor selection (gas to be measured of process high concentration) or wavelength-modulated absorption spectroscopy techniques (gas to be measured of process low concentration) go to process described first electric signal.
In order to detect the content of different floor indoor gas, further, unmanned plane carries described light source, detector, light deflection module, gas cell fly to outdoor, and the light that described light source sends injects indoor.
In order to reduce the dead weight capacity of unmanned plane to improve the flying power of unmanned plane, further, described processor is arranged in Control Room or monitoring car; The electric signal of output is wirelessly sent to described processor by described detector.
In order to allow owner grasp indoor safety case, find the potential safety hazards such as natural gas leaking early, further, described gas remote measurement method is further comprising the steps:
(A5) if the content C of gas to be measured is non-vanishing, and in increasing trend, prompting is reported to the police, and content information is sent on the communication terminal of owner.
Embodiment 2:
Application examples in detecting according to gas remote measurement device and method natural gas leaking in each layer room of residential building of the utility model embodiment 1.
In this application examples, an only light source adopts Distributed Feedback Laser, and the wavelength measuring light comprises 1651nm (corresponding to the absorption line of methane); Go to modulate output wavelength by the drive current and working temperature adjusting laser instrument; Beam splitting device adopts semi-transparent semi-reflecting lens; The light by window and wall reflection collected by use convergent lens, and the light after convergence is received by the first detector; The methane of concentration known is sealed with in gas cell; Unmanned plane adopts large boundary unmanned plane; Laser instrument, detector and light deflection module, gas cell, processor are installed on unmanned plane.
Fig. 2 schematically illustrates the basic block diagram of the light deflection module of the utility model embodiment, and as shown in Figure 2, described smooth deflection module comprises:
The wedge shape transmission device 11 between light entrance face and light-emitting face with the angle of wedge is fixed on the side of web member 21, and described first light beam is through described wedge shape transmission device; The opposite side of web member is fixed with at least two range adjusters 31,32; The adjustable length of at least two range adjusters (employing piezoelectric), the length of regulator is changed by adjusting the voltage that is applied on range adjuster, thus adjust the inclined degree of described web member relative to the first light beam, also namely adjust the incident angle of the light entrance face of the first light beam opposite wedge transmission device.
In the course of work of telemetering device:
(B1) unmanned plane carries described light source, detector, light deflection module, gas cell and processor and flies to outdoor;
Positioning step: need the position adjusting unmanned plane, takes a width template image in the outer suitable inspection positions of building layer window and stores;
Unmanned plane climbs certain altitude, and this highly approximates the floor height of building.The height climbed can be controlled by GPS, or operator probably estimates a height.After unmanned plane hovering, entrained video camera shooting piece image, software extracts the angle point (angle point grid can use Harris algorithm or other similar image characteristics extraction algorithms) of window on image, then mate with the corner location of window on template image, if angle point (can set three compare thresholds in the position of image and mutual angle, distance with template is basically identical, when position, angle and distance are all less than given threshold value, think consistent), then the match is successful, representing locates successfully, enters remote measurement step.If above-mentioned information gap is comparatively large, illustrates and locate unsuccessfully.
If locate unsuccessfully, attempt rotating unmanned plane or the video camera certain angle entrained by rotation, again take image, mate with template image according to above-mentioned matching process, if the match is successful, then represent and locate successfully, enter remote measurement step.
If still unsuccessful after adjusting unmanned plane and video camera attitude, then need the height adjusting unmanned plane, rise or decline certain distance, then repeat above-mentioned steps, until locate successfully;
(A1) the measurement light that laser instrument sends is divided into the first light beam and the second light beam, and the wavelength of described measurement light covers the absorption line of methane;
(A2) described first light beam is through light deflection module, and inject indoor through glass pane afterwards, the first detector will be converted to the first electric signal by the first light beam reflected after indoor methane adsorption, and is sent to processor;
Described second light beam passes the methane that in gas cell, concentration is known, and the second light beam of injection is converted to the second electric signal by the second detector, and is sent to processor;
(A3) the second electric signal described in processor process, deviation between wavelength corresponding when showing that the intensity of methane adsorption second harmonic signal is maximum with the ratio of the intensity of first harmonic signal and methane adsorption spectral line is (at the absorption line place of methane, the ratio of the intensity of methane adsorption second harmonic signal and the intensity of first harmonic signal is maximum, be stored in advance in processor), namely the drift of the output wavelength of described light source is drawn, if drift exceeds standard, then adjust the running parameter of described light source, as laser. operating temperature or working current, enter step (A1), if do not exceed standard, enter step (A4),
Processor draws the interference signal between the reflected light of the first light beam on glass pane according to described first electric signal, and some relating to exceeds standard, then adjust the angle of inclination of the first relatively incident light beam of described smooth deflection module, enter step (A1); If do not exceed standard, enter step (A4);
(A4) the direct absorption spectroscopy techniques of processor selection (methane of process high concentration) or wavelength-modulated absorption spectroscopy techniques (methane of process low concentration) go to process described first electric signal, thus obtain the content of indoor methane;
(A5) if the content C of methane is non-vanishing, and in increasing trend, prompting is reported to the police, and content information is sent on the communication terminal of owner.
Embodiment 3:
Application examples in detecting according to gas remote measurement device and method natural gas leaking in each layer room of residential building of the utility model embodiment 1, as different from Example 2:
1. gas cell and the second detector integrate, alternative gas is sealed with in gas cell, the absorption line of this alternative gas and the absorption line of methane are all in the output wavelength sweep limit of laser instrument, for the alternative gas that this concentration is known, the ratio of the intensity of the second harmonic signal of gas absorption and the intensity of first harmonic signal is maximum at the absorption line place of alternative gas, and this maximal value is stored in advance in processor; In remote measurement process, by analyzing the second electric signal that the second detector exports, deviation between wavelength corresponding when showing that the intensity of the absorption second harmonic signal of alternative gas is maximum with the ratio of the intensity of first harmonic signal and the absorption line of alternative gas, namely draws the drift of the output wavelength of described light source.
2. on the subregion of the plane of incidence of light convergent lens, plate reflectance coating, the measurement light inciding this region is reflected, thus measurement light is divided into the first light beam through light convergent lens and the second light beam by reflecting film reflects.
3. processor is arranged in monitoring car, uses radio communication with the driver module of described laser instrument and detector.
Above-described embodiment is only the situation exemplarily giving Methane in Air in sensing chamber, certainly can also be other gas, as poisonous in benzene homologues, formaldehyde, coal gas etc., harmful gas and flammable explosive gas, for a person skilled in the art, the embodiment of these gas detect, the basis of above-described embodiment not needing pay creativeness can draw.
Claims (6)
1. gas remote measurement device, described gas remote measurement device comprises light source, the first detector and processor; It is characterized in that: described gas remote measurement device comprises further:
Beam splitting device, the measurement light that described beam splitting device is used for described light source to send separates the first light beam and the second light beam, and described first light beam is through region to be measured;
Light deflection module, described smooth deflection module is for changing the direct of travel of the first light beam;
Gas cell, described second light beam is through described gas cell, and described gas cell holds the known gas of concentration; The wavelength of the measurement light that an only light source sends covers the absorption line of the known gas of concentration in gas to be measured, gas cell;
Second detector, described second detector is used for the second light beam through described gas cell to be converted to the second electric signal, and is sent to processor.
2. gas remote measurement device according to claim 1, is characterized in that: described gas remote measurement device comprises further:
Unmanned plane, described light source, the first and second detectors, light deflection module, gas cell are arranged on described unmanned plane.
3. gas remote measurement device according to claim 1, is characterized in that: described smooth deflection module comprises further:
Wedge shape transmission device, described wedge shape transmission device is fixed on the side of web member, and described first light beam is through described wedge shape transmission device;
Web member, the opposite side of described web member is fixed with at least two range adjusters;
At least two range adjusters, the adjustable length of described at least two range adjusters, for adjusting the inclined degree of described web member relative to the first light beam.
4. gas remote measurement device according to claim 3, is characterized in that: described range adjuster adopts piezoelectric.
5. gas remote measurement device according to claim 1, is characterized in that: the gas that described concentration is known and gas to be measured are identical or different gas.
6. gas remote measurement device according to claim 1, is characterized in that: described light source is laser instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520950442.2U CN205192940U (en) | 2015-11-25 | 2015-11-25 | Gaseous telemetry unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520950442.2U CN205192940U (en) | 2015-11-25 | 2015-11-25 | Gaseous telemetry unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205192940U true CN205192940U (en) | 2016-04-27 |
Family
ID=55785919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520950442.2U Active CN205192940U (en) | 2015-11-25 | 2015-11-25 | Gaseous telemetry unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205192940U (en) |
-
2015
- 2015-11-25 CN CN201520950442.2U patent/CN205192940U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105319173A (en) | Gas remote sensing detection device and method | |
| CN202393703U (en) | Device for gas leakage monitoring by means of three-dimensional cradle head scanning and laser telemetering | |
| CN106640195B (en) | Mine explosion monitoring and alarming system | |
| CN207850919U (en) | A kind of vehicle-mounted natural gas leaking detection device | |
| CN102426218A (en) | Mobile device and method for automatically detecting harmful gas | |
| CN111779540A (en) | In-situ detection and remote monitoring analysis system and method for mine underground closed environment parameters | |
| CN102105779A (en) | Method for detection of gases by laser spectroscopy, and gas sensor | |
| CN105425808A (en) | Airborne-type indoor gas remote measurement system and method | |
| CN104851231A (en) | Monitoring apparatus of nearby environment of power transmission line | |
| CN113189039B (en) | Multi-phase state hazardous chemical substance three-dimensional detection system and method | |
| CN106872961A (en) | A kind of optical lens, optical distance measurement apparatus and distance-finding method, range-measurement system | |
| CN205656309U (en) | Small -size infrared distance measuring device | |
| CN206562235U (en) | A kind of lift car speed of service and station acquisition device | |
| CN205192940U (en) | Gaseous telemetry unit | |
| CN105203485B (en) | The detection means and method of indoor gas | |
| CN114894248A (en) | Line monitoring method, device and system | |
| CN108535188A (en) | A kind of the unmanned plane gas detecting system and its detection method of single line laser | |
| CN110057773A (en) | A kind of infrared gas sensor system and the temperature-compensation method based on AACA-Elman algorithm | |
| CN205068170U (en) | Machine carries positioner and machine carries indoor gaseous remote supervising system of formula | |
| CN205103151U (en) | Telemetry unit of indoor gas | |
| CN105259125B (en) | The telemetering equipment and method of indoor gas | |
| CN205067331U (en) | Detection apparatus for indoor gas | |
| CN209690160U (en) | A kind of Environmental security detection device | |
| CN111942585A (en) | Method for monitoring gas pipeline by unmanned aerial vehicle | |
| CN105300905B (en) | Machine-carried type gas remote measurement system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |