CN104122039B

CN104122039B - The monitoring system and method for olefin gas leakage

Info

Publication number: CN104122039B
Application number: CN201310148131.XA
Authority: CN
Inventors: 孟思齐; 张力; 黄晓家; 陈祥初; 王明会; 王军
Original assignee: GR APPLICATION TECHNOLOGY Co Ltd
Current assignee: GR APPLICATION TECHNOLOGY Co Ltd
Priority date: 2013-04-25
Filing date: 2013-04-25
Publication date: 2016-12-28
Anticipated expiration: 2033-04-25
Also published as: CN104122039A

Abstract

The monitoring system and method for a kind of olefin gas leakage, this monitoring system includes: for detecting region to be measured and the probe unit of imaging, including infrared thermography, comprise olefin gas evaluator in infrared thermography；Analytic unit includes image pre-analysis module and image qualitative analysis module, the image that described probe unit before starting olefin gas evaluator is detected by image pre-analysis module is analyzed, determine whether gas, the image that probe unit after the startup of olefin gas evaluator is detected by image qualitative analysis module is identified and analyzes, it may be judged whether for olefin gas；Control and driver element, connect probe unit and analytic unit, control according to the analysis result of analytic unit and drive olefin gas evaluator；Alarm unit.Monitoring system and method disclosed by the invention is for the on-line monitoring of olefin gas leakage, it is possible to detect the leakage of olefin gas timely and accurately, it is ensured that the safety of production is with continuous.

Description

The monitoring system and method for olefin gas leakage

Technical field

The present invention relates to monitoring system and method, particularly relate to monitoring system and the side of the leakage of a kind of olefin gas Method.

Background technology

In chemical industry place, the leakage of olefines gas can bring serious harm, not only affects production, also may be used Can cause security incident, directly threaten the safety of people, therefore the security monitoring in chemical industry place is the most all subject to People pay attention to widely.

At present infrared imagery technique has begun to extensively apply in security monitoring field, is generally used for obtaining being shot The thermal-induced imagery of object, thermal-induced imagery can be with temperature marker information.According to the difference of focal plane performance, Infrared thermography can be operated in two frequency ranges: the medium wave frequency range of 3-5 micron and the long wave of 8-14 micron are frequently Section.Having the thermal infrared imager of more than 320 × 240 pixels, can to detect major part artificial vision invisible Chemical gases.

Although used infrared imagery technique that the gas with hazardness is monitored at present, but for chemical industry For place, need a collection detection and the monitoring system of alarm integrated, fully ensure that the life that chemical industry is on-the-spot Produce safety, and existing all can not visualize for combustible gas detecting and the system of warning, equipment, equipment Ground detection and discovery olefin gas leakage, it is impossible to intuitively find that olefin gas leak position and diffusion-condition etc. are asked Topic, especially can not form a total system.

Summary of the invention

For problem of the prior art, it is an object of the invention to develop a kind of alkene brand-new, visually Appropriate hydrocarbon gas leak detection and alarm method, form the online monitoring system of a kind of olefin gas leakage.Can be real Effectively detect now the olefin gas leakage of alkenes compounds in chemical plant installations district, find source of leaks basis Leakage situation carries out early warning and warning.

For reaching this purpose, the present invention uses following technical scheme:

A kind of monitoring system of olefin gas leakage, including: probe unit, including infrared thermography, institute Stating and comprise olefin gas evaluator in infrared thermography, described probe unit is for visiting region to be measured Survey and imaging；Analytic unit, including image pre-analysis module and image qualitative analysis module, image preanalysis Module includes image analysis software, the figure being detected described probe unit before starting olefin gas evaluator As being analyzed, it may be judged whether for gas, image qualitative analysis module includes that olefin gas analyzes software, right The image that after the startup of olefin gas evaluator, described probe unit is detected is identified and analyzes, it is judged that be No for olefin gas；Control and driver element, connect described probe unit and analytic unit, single according to analyzing The analysis result of unit controls and drives the olefin gas evaluator in probe unit；Alarm unit, connects described Analytic unit, reports to the police according to the analysis result of described analytic unit.

Wherein, described analytic unit also includes quantitative Analysis and judge module, quantitative Analysis and judge module Include the condition triggering warnings at different levels preset, after image qualitative analysis module carries out qualitative analysis, Change to the infrared image gas area in region to be measured calculates and judges, starts different types of warning, Before and after what described gas graphics area changed is calculated as separated in time, the ratio of gas image area change.

Wherein, image qualitative analysis module includes that olefin gas analyzes software, analyzes whether gas to be measured passes through The bandpass filter of described olefin gas evaluator.

Wherein, also including temperature sensing module in described analytic unit, described temperature sensing module is to district to be measured The temperature of the infrared image in territory detects and analyzes.

Wherein, described analytic unit also includes quantitative Analysis and judge module, quantitative Analysis and judge module Include the condition triggering warnings at different levels preset, during monitoring, the infrared image in region to be measured is shown The variations in temperature shown calculates and judges, starts different types of warning.

Wherein, described olefin gas evaluator includes rotating disk, and the band pass filter that is arranged on rotating disk and sky Window.

Wherein, described olefin gas evaluator includes that 3-5 length of a film wavestrip pass filter or 2 middle wavestrips are led to Filter plate.

Wherein, described olefin gas evaluator includes 3 length of a film wavestrip pass filters, and its centre wavelength is respectively It it is 10.1 ± 0.02,10.399 ± 0.02,12.28 ± 0.02 microns；Or described olefin gas evaluator wraps Including 5 length of a film wavestrip pass filters, its centre wavelength is respectively 10.1 ± 0.02,10.37 ± 0.02,10.399 ± 0.02,11.24 ± 0.02,12.28 ± 0.02 microns；Or described olefin gas evaluator includes in 2 Wavestrip pass filter, its centre wavelength 3.24 ± 0.02,3.31 ± 0.02 microns respectively.

Wherein, described alarm unit includes three grades of warning function modules.

Wherein, this analytic unit also includes assisting in identifying module, and this information assisting in identifying resume module needs Survey one or more in the facility information in region, work information, environmental information, visible ray camera information.

Wherein, described alarm unit also includes display device, to show olefin gas leakage or temperature anomaly The position occurred

Wherein, the explosion-proof and power supply unit being connected with probe unit is also included.

Present invention also offers the monitoring method of a kind of olefin gas leakage, comprise the following steps: use detection Infrared thermography detection target in unit, it is thus achieved that infrared image；Use the figure in image pre-analysis module The infrared image obtained is analyzed by conformal analysis software；According to the analysis result of image pre-analysis module, When being found to have gas, control to start the olefin gas evaluator in infrared thermoviewer with driver element, carry out figure As detection, the image detected is identified and analyzes by image qualitative analysis module, it may be judged whether for alkene Gas leaks；When determine be olefin gas leakage time, use alarm unit report to the police.

Wherein, the image detected is identified by described image qualitative analysis module and analysis includes, point Whether analyse gas to be measured by the bandpass filter of described olefin gas evaluator.

Wherein, after being judged as olefin gas leakage, also include using quantitative Analysis with judge module to be measured The change of the infrared image gas area in region calculates and judges, starts different types of warning, described Before and after what gas graphics area changed is calculated as separated in time, the ratio of gas image area change.

Wherein, also include use temperature sensing module the temperature of the infrared image in region to be measured is carried out detection and Analyze.

Wherein, described analytic unit also includes quantitative Analysis and judge module, the infrared figure to region to be measured The carrying out of the variations in temperature shown in as calculates and judges, starts different types of warning.

Wherein, described olefin gas evaluator includes 3 length of a film wavestrip pass filters or 2 logical filters of middle wavestrip Wave plate.

Wherein, the image detected is identified and analyzes by image qualitative analysis module, analyzes gas to be measured When whether passing through the bandpass filter of described olefin gas evaluator, according to band pass filter centre wavelength from little It is analyzed to big order.

Compared with prior art, the monitoring system and method for olefin gas disclosed by the invention leakage is applicable to alkene The on-line monitoring of appropriate hydrocarbon gas leakage, it is possible to detect the leakage of olefin gas timely and accurately, it is ensured that the peace of production Complete and continuous.

Accompanying drawing explanation

Fig. 1 is the structural representation of the monitoring system in embodiment one.

Fig. 2 is the structural representation of the infrared thermography in embodiment one

Fig. 3 is the structural representation of the olefin gas evaluator in embodiment one

Fig. 4 is the flow chart of the monitoring method in embodiment two.

Fig. 5 is the flow chart identifying olefin gas in embodiment two.

Fig. 6 is the structural representation of the monitoring system in embodiment three..

Fig. 7 is the flow chart of the monitoring method in embodiment four.

Fig. 8 is the structural representation of the olefin gas evaluator in embodiment six.

Wherein, description of reference numerals is as follows:

1, camera lens；2, lens interface；3, Infrared Detectors；4, imaging circuit；5, coding motor；6、 Olefin gas evaluator rotating disk；6-1, empty window；6-2, black matrix；6-3,6-4,6-5,6-6,6-7, band are logical Filter plate；11, probe unit；12, analytic unit；13, control and driver element.

Detailed description of the invention

The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this Specific embodiment described by place is used only for explaining the present invention, rather than limitation of the invention.The most also need It is noted that for the ease of describing, accompanying drawing illustrate only part related to the present invention and not all knot Structure.

Embodiment one:

The present embodiment discloses the monitoring system of a kind of alkene leakage, and Fig. 1 is the monitoring system in the present embodiment Structural representation.As it is shown in figure 1, this monitoring system includes probe unit 11, this probe unit includes infrared Thermal imaging system, Fig. 2 is the structural representation of described infrared thermography, and described infrared thermography includes mirror 1, lens interface 2, olefin gas evaluator 6, Infrared Detectors 3 and process circuit 4, encode motor 5. Fig. 3 is the plan structure schematic diagram of olefin gas evaluator 6.As it is shown on figure 3, this olefin gas evaluator 6 Including the empty window 6-1 being arranged on rotating disk, black matrix 6-2, band pass filter 6-3,6-4 and 6-5.In Fig. 3 Illustrate only olefin gas evaluator and include the situation of three band pass filters, it practice, this olefin gas is known Other device can include 1-5 sheet band pass filter.And those skilled in the art could be aware that, Fig. 3 is only It is a kind of schematic diagram, the actually position and from each other of band pass filter on olefin gas evaluator rotating disk Interval can change.

The operation principle of this olefin gas evaluator is as follows: not powering up or power up normal imaging when, Empty window 6-1 on olefin gas evaluator rotating disk is just to Infrared Detectors 3, and now olefin gas evaluator does not has Start, it is ensured that normal image quality.When powering up moment or long-term image charging effect is bad, soft Part sends instruction by RS485 to circuit board, and circuit board receives instruction, starts encoder driven by motor rotating disk Black matrix 6-2 is made to forward to, just to Infrared Detectors 3, be corrected, black matrix playback after correction, it is ensured that empty window Just to detector, do not affect infrared imaging.When be found to have olefin gas leakage time, software by RS485 to Circuit board sends instruction, and circuit board receives instruction, start encoder motor 5 rotate successively band pass filter 6-3, 6-4 and 6-5, each filter plate will stay for some time in face before the detectors, it is ensured that pattern analysis described later Software can receive at least 3 complete images under filter plate, and driven by motor rotating disk returns to sky window position. Encoder motor 5 drives the whole olefin gas arbitrarily angled rotation of evaluator rotating disk, and encoder motor tool There is higher resolution, sky window, black matrix, filter plate can be made to stop exactly to preset position

In the present embodiment, the mode of operation of olefin gas evaluator is as follows: in normal state, empty window 6-1 Just to Infrared Detectors 3, now olefin gas evaluator does not start, namely the band of olefin gas evaluator Pass filter sheet is not in the light path of imaging, and (target herein with the production scene in chemical industry place is detection target Example, but the invention is not restricted to this) obtain infrared image, advantage of this is that make lens group be pooled to red The most being collected of exterior-heat emittance, is unlikely to be stopped by band pass filter at the very start, these are red Exterior-heat emittance is converted into the signal of telecommunication, through imaging circuit by Infrared Detectors 3 namely focal plane arrays (FPA) Demonstrate infrared image clearly over the display, advantageously in the monitoring to production scene safety.

When follow-up image pre-analysis module passes through pattern analysis in the case of not starting olefin gas evaluator When the image that software discovery detects has gas characteristic, instruction can be sent by control unit to circuit board, When circuit board receives instruction, encoder motor 5 starts olefin gas evaluator, successively rotational band pass filter Sheet, is filtered the gas passed through, and judges with the kind to gas.

The present embodiment mid-infrared detector 3 uses focal plane arrays (FPA), and this focal plane arrays (FPA) uses 8-14 The long wave focal plane arrays (FPA) of micron, then the corresponding olefin gas evaluator used is long wave olefin gas evaluator, It is made up of the specific band pass filter through bands of a spectrum of 1-5 sheet.In the online monitoring system in chemical industry place, need To judge whether the gas leaked is olefin gas exactly, if being only some harmless gases, as water steams The appearance of gas etc., judge inaccurate in the case of, these harmless gases are defined as by mistake olefin gas and If warning, cause into the pause of production, bring the biggest economic loss, the most in the present embodiment in order to Avoiding the appearance of above-mentioned situation, more accurately determining is olefin gas, uses the band pass filter of 3, institute State the centre wavelength position of 3 band pass filters 6-3,6-4 and 6-5 respectively be 10.1 ± 0.02 microns, 10.399 ± 0.02 microns and 12.28 ± 0.02 microns.The passband length of alkene band pass filter is all 100 ± 20nm.The centre wavelength of above 3 alkene band pass filters is the reference olefin(e) compound length at 8-14 micron The infrared spectrum feature of ripple frequency range is preferably chosen, and above 3 band pass filters select such center Wavelength can cover the key band of olefin gas, determines as olefin gas.In mode more preferably, Use centre wavelength position be respectively 10.1 ± 0.02 microns, 10.37 ± 0.02 microns, 10.399 ± 0.02 micro- Rice, 11.24 ± 0.02 microns and 12.28 ± 0.02 microns 5 band pass filters to the judgement of olefin gas more Adding accurately, the band pass filter of 5 such centre wavelengths can be completely covered the key band of olefin gas, Accurately determine as olefin gas, it is to avoid false alarm.

Band pass filter judge gas be whether olefin gas principle be, the infra-red radiation letter of gas to be measured Number through band pass filter filter after it is observed that infrared image, the infrared radiation signal of gas the most to be measured is saturating Cross band pass filter, then it is assumed that gas to be measured is olefin gas, if not it is observed that gas image, then The infrared radiation signal of gas to be measured is not transmitted through band pass filter, then it is assumed that gas to be measured is not olefin gas, In following embodiment, principle is identical with the present embodiment.

Owing to probe unit is arranged on monitoring site in this monitoring system, this monitoring site is Chemical Manufacture Place, must have an explosion-proof guard shield in the outside of whole probe unit, and have and be connected with probe unit Antibomb unit and power supply unit, to ensure the safe operation of probe unit.

This monitoring system also includes analytic unit 12, and the image detecting probe unit is analyzed, described Probe unit includes image pre-analysis module and image qualitative analysis module, and image pre-analysis module includes figure The image that described probe unit is detected by conformal analysis software is analyzed, it may be judged whether for gas.

Infrared thermography provides temp sensing function, has temperature to show on the infrared image forming target to be measured. In the preferred mode of another kind, this analytic unit also includes temperature sensing module, in region to be measured Temperature shown by infrared image detects, and monitors and analyzes, if it find that temperature anomaly raises, is higher than One value set, starts warning the most immediately.

This monitoring system also includes controlling and driver element 13, and described control is connected described detection with driver element Unit and analytic unit, when the image pre-analysis module in analytic unit judges the infrared image tool of detection target When having gas characteristic, this control starts encoder motor, encoder motor with driver element by drive circuit Rotate olefin gas evaluator rotating disk, namely start olefin gas evaluator, make band pass filter just to red External detector 3, after starting olefin gas evaluator, probe unit carries out imaging to detection target, described Probe unit after starting olefin gas evaluator is detected by the image qualitative analysis module in analytic unit Image be analyzed identify；As it was previously stated, when encoder electric machine rotation band pass filter, bandpass filtering Sheet to stay for some time at detector surface, it is ensured that software can receive at least 3 under band pass filter Complete image, these images are analyzed by the olefin gas analysis software in image qualitative analysis module, Whether analyze gas to be measured by the bandpass filter of described olefin gas evaluator.As the most such as Really encoder motor 5 starts, and first rotates rotating disk, makes band pass filter 6-3 just on Infrared Detectors 3, In the light path of infrared imaging, infrared image formed by gas to be measured is by the alkene in image qualitative analysis module Gas analysis software is analyzed, if it is considered to gas to be measured is by band pass filter, then in control unit Drive circuit gives an order, and encoder motor 5 starts, and rotates band pass filter 6-4, if image qualitative analysis Module thinks that gas to be measured is not over band pass filter 6-3, then it is assumed that this gas is not olefin gas, stops Qualitative analysis to gas, encoder motor 5 makes sky window 6-1 just to Infrared Detectors 3, is returned to normal Monitor state.

If gas to be measured can be all by three above-mentioned band pass filters, it is determined that be for olefin gas.

This monitoring system also includes alarm unit, when the image qualitative analysis module in analytic unit determines it is alkene Alert process is carried out during appropriate hydrocarbon gas.

In alarm unit, also include that display device, display occur position and the temperature anomaly of olefin gas leakage The position occurred, it is simple to process in time.

In the preferred mode of above-mentioned another kind, temperature sensing module is connected with alarm unit, and described temperature is visited Surveying module and include temperature sensing software, during whole monitoring, the image being detected probe unit is carried out The detection of temperature and analysis, if it find that temperature arrives a definite value, this definite value can preset, and is tactile Transmitting messages alert temperature conditions, as preset, to trigger the temperature reported to the police be 160 DEG C, when temperature sensing module finds Which kind of when temperature on-the-spot in the image detected is higher than 160 DEG C, the most no longer it is analyzed as gas, directly Start alarm unit to report to the police.So can report to the police rapidly when there being unexpected ramp case, it is to avoid security incident Occurring, the safety for producing reoffers a kind of guarantee.

In the monitoring system that the present embodiment is provided, including the spy for scene to be measured being carried out infrared imaging Survey unit, for image pre-analysis module imaging results being analyzed and monitor, for the gas to leakage Body carries out the image qualitative analysis module of qualitative analysis, and according to qualitative point of image pre-analysis module and image The control that olefin gas evaluator in infrared thermoviewer is controlled by the analysis result of analysis module is single with driving Unit, and alarm unit.Each ingredient of this monitoring system organically combines, and carries out scene to be measured accurately Effective monitoring, can find that olefin gas leakage is reported to the police rapidly, it is ensured that the safety of production, prevent again wrong report The alert loss brought, simultaneously in preferred mode, during whole monitoring, uses in analytic unit The temperature at scene to be measured is monitored by temperature sensing module in real time, reports to the police rapidly when there being unexpected ramp case, Prevent the unexpected security incident caused that heats up, it is ensured that the high safety of production.

Embodiment two:

The present embodiment describes the monitoring method using the monitoring system in embodiment one to leak alkene in detail.Fig. 4 Show the flow chart of the method.First, thermal infrared imager does not start olefin gas evaluator, namely alkene The band pass filter of appropriate hydrocarbon gas evaluator not in the light path of imaging, the empty window of the rotating disk of olefin gas evaluator 6-1 just to Infrared Detectors 3, detection target (target herein as a example by the production scene in chemical industry place, but The invention is not restricted to this) obtain infrared image, advantage of this is that the infra-red heat spoke making lens group be pooled to Penetrate the most being collected of energy, be unlikely to be stopped by band pass filter at the very start, these infra-red heat spokes Penetrate energy and be converted into the signal of telecommunication by focal plane arrays (FPA), demonstrate the reddest over the display through imaging circuit Outer image, advantageously in the monitoring to production scene safety.

Then the detected infrared image analysis of image analysis software analysis in employing image pre-analysis module is No have gas characteristic, if not having gas characteristic, thermal infrared imager continues to keep not triggering olefin gas The state of evaluator, continues detection target, namely continues to monitor production scene normally, if Image analysis software analyzes detected infrared image and has gas characteristic, then use and control and drive list Drive circuit in unit starts encoder motor, rotates the band pass filter on olefin gas evaluator rotating disk, Make band pass filter just to Infrared Detectors 3, use image qualitative analysis module to judge the infrared figure now obtained It seem the no feature meeting olefin gas.

The method judged is first to control to start encoder motor, rotational band with the drive circuit in driver element Pass filter sheet 6-3, makes band pass filter 6-3 just to Infrared Detectors 3, detects infrared image, described figure As qualitative analysis module detects after starting the band pass filter 6-3 that centre wavelength is 10.1 ± 0.02 microns The image that unit is detected is analyzed, and whether analyzes gas to be measured by described olefin gas evaluator Bandpass filter 6-3.If do not passed through, it was demonstrated that this gas is not olefin gas, may be steam etc. other Gas, then control to be made by encoder electric machine rotation alkene evaluator rotating disk with the drive circuit in driver element Band pass filter 6-3 playbacks, and empty window 6-1 is just to Infrared Detectors 3, and whole monitoring system is returned to again normally Monitor state.If olefin gas analyzes software thinks that gas to be measured has passed through band pass filter 6-3, then control With driver element by encoder motor, rotate olefin gas evaluator rotating disk, just make band pass filter 6-4 To Infrared Detectors 3, namely start the band pass filter 6-4 that centre wavelength is 10.399 ± 0.02 microns, Infrared thermoviewer detects infrared image, and the image qualitative analysis module in described analytic unit is logical to starting band The image that after filter plate 6-4, probe unit is detected is analyzed and identifies, whether analyzes gas to be measured Pass through band pass filter 6-4.If do not passed through, it was demonstrated that this gas is not olefin gas, may be steam Deng other gases, then control with the drive circuit in driver element by encoder electric machine rotation alkene evaluator Rotating disk makes band pass filter 6-4 playback, and empty window 6-1 is just to Infrared Detectors 3, and whole monitoring system is replied again To normal monitoring state.If image analysis software thinks that gas to be measured has passed through band pass filter 6-4, then control In system and driver element by encoder motor, rotate alkene evaluator rotating disk, make band pass filter 6-5 Just to Infrared Detectors 3, namely start the band pass filter 6-5 that centre wavelength is 12.28 ± 0.02 microns, Infrared thermoviewer detects infrared image, and the image qualitative analysis module in described analytic unit is logical to starting band The image that after filter plate 6-5, probe unit is detected is analyzed and identifies, whether analyzes gas to be measured Passing through band pass filter 6-5, if do not passed through, it was demonstrated that this gas is not olefin gas, may be steam Deng other gases, then control with the drive circuit in driver element by encoder electric machine rotation alkene evaluator Rotating disk makes band pass filter 6-5 playback, and empty window 6-1 is just to Infrared Detectors 3, and whole monitoring system is replied again To normal monitoring state.If passed through, it is believed that gas to be measured has the feature of olefin gas, determine infrared figure The gas characteristic presented in shape is the gas characteristic of olefin gas, it is judged that leaks for olefin gas, then reports to the police Unit starting is reported to the police, and above flow process is as shown in Figure 5.Above description is the situation of 3 filter plates, if It is 5 filter plates, then repeats above-mentioned process.Adopt and can judge it is alkene in such a way exactly Gas leaks, and prevents the generation of false alarm.Certainly, those skilled in the art can also select a piece of or two The band pass filter of sheet even more multi-disc, as long as being capable of the identification to olefin gas.

The monitoring method of the olefin gas leakage that present embodiment proposes, it is possible to the online production to chemical industry place Scene is monitored, and can report to the police exactly, has both been avoided that because olefin gas leaks the security incident caused Generation, the economic loss that false alarm brings can be prevented again.

In the preferred mode of another kind, during the leakage of olefin gas is monitored, use point Temperature sensing module in analysis unit, the image being detected probe unit carries out detection and the analysis of temperature, If it find that temperature arrives a definite value, this definite value can preset, for triggering the temperature conditions reported to the police, It is 160 DEG C as preset the temperature triggering warning, existing in temperature sensing module finds the image detected When the temperature of field is higher than 160 DEG C, it is believed that there occurs exception, directly initiates alarm unit and report to the police.So can be Report to the police rapidly when having unexpected ramp case, it is to avoid the generation of security incident, reoffer one for the safety produced Ensure.

Embodiment three:

Present embodiment discloses the monitoring system of another kind of alkene leakage.Fig. 6 shows the knot of this monitoring system Structure schematic diagram.This monitoring system includes probe unit, and this probe unit includes infrared thermography, described red Outer thermal imaging system is identical with the structure of the infrared thermography in embodiment one.Including camera lens, lens interface, Olefin gas evaluator, Infrared Detectors and process circuit, encode motor.In normal state, empty window 6-1 Just to Infrared Detectors 3, now olefin gas evaluator does not start, namely the band of olefin gas evaluator Pass filter sheet is not in the light path of imaging, and (target herein with the production scene in chemical industry place is detection target Example, but the invention is not restricted to this) obtain infrared image, advantage of this is that make lens group be pooled to red The most being collected of exterior-heat emittance, is unlikely to be stopped by band pass filter at the very start, these are red Exterior-heat emittance is converted into the signal of telecommunication by Infrared Detectors i.e. focal plane arrays (FPA), exists through imaging circuit Infrared image clearly is demonstrated, advantageously in the monitoring to production scene safety on display.

When follow-up image pre-analysis module utilizes pattern analysis in the case of not starting olefin gas evaluator When the image that software discovery detects has gas characteristic, send instruction can to the drive circuit in control unit, When circuit board receives instruction, encoder motor 5 starts olefin gas evaluator, successively rotational band pass filter Sheet, is filtered the gas passed through, and judges with the kind to gas.

The present embodiment mid-infrared detector 3 uses focal plane arrays (FPA), and this focal plane arrays (FPA) uses 8-14 The long wave focal plane arrays (FPA) of micron, then the corresponding olefin gas evaluator used is long wave olefin gas evaluator, It is made up of the specific band pass filter through bands of a spectrum of 1-5 sheet.In the online monitoring system in chemical industry place, need To judge whether the gas leaked is olefin gas exactly, if being only some harmless gases, as water steams The appearance of gas etc., judge inaccurate in the case of, these harmless gases are defined as by mistake olefin gas and If warning, cause into the pause of production, the biggest economic loss can be brought, be the most in the present embodiment Avoiding the appearance of above-mentioned situation, more accurately determining is olefin gas, use the band pass filter of 3, It is micro-that the centre wavelength position of described 3 band pass filters 6-3,6-4 and 6-5 respectively is 10.1 ± 0.02 Rice, 10.399 ± 0.02 microns and 12.28 ± 0.02 microns, in mode more preferably, cardiac wave in employing Long position be respectively 10.1 ± 0.02 microns, 10.37 ± 0.02 microns, 10.399 ± 0.02 microns, 11.24 ± 5 band pass filters of 0.02 micron and 12.28 ± 0.02 microns are more accurate to the judgement of olefin gas, keep away Exempt from false alarm.

This monitoring system also includes analytic unit, and the image detecting probe unit is analyzed, described spy Surveying unit and include image pre-analysis module and image qualitative analysis module, image pre-analysis module includes figure The image that described probe unit is detected by analysis software is analyzed, it may be judged whether for gas.

This monitoring system also includes controlling and driver element, and it is single that described control is connected described detection with driver element Unit and analytic unit, when the image pre-analysis module in analytic unit judges that the infrared image of detection target has During for gas characteristic, this control starts encoder motor, encoder motor with driver element by drive circuit Rotate olefin gas evaluator rotating disk, namely start olefin gas evaluator, make band pass filter just to red External detector 3, after starting olefin gas evaluator, probe unit carries out imaging to detection target, described Image qualitative analysis Module-embedding olefin gas in analytic unit analyzes software, has olefin gas identification merit Can, the figure that probe unit after starting olefin gas evaluator is detected by described image qualitative analysis module As being analyzed and identifying, as it was previously stated, when encoder electric machine rotation band pass filter, band pass filter To stay for some time at detector surface, it is ensured that software can receive under band pass filter at least 3 complete Whole image, it is i.e. to be analyzed these images that the olefin gas in image qualitative analysis module analyzes software, Whether analyze gas to be measured by the bandpass filter of described olefin gas evaluator.As the most such as Really encoder motor 5 starts, and first rotates band pass filter 6-3, makes band pass filter 6-3 just to infrared spy Surveying on device 3, in the light path of infrared imaging, infrared image formed by gas to be measured is by image qualitative analysis mould Image analysis software in block is analyzed, if it is considered to gas to be measured is by band pass filter, then controls list Drive circuit in unit gives an order, and encoder motor 5 starts, and rotates band pass filter 6-4, if image is fixed Property analyze module think that gas to be measured is not over band pass filter 6-3, then it is assumed that this gas is not alkene gas Body, stops the qualitative analysis to gas, and encoder motor 5 makes sky window 6-1 just to Infrared Detectors 3, replys To normal monitor state.

Compared with embodiment one, in the present embodiment, analytic unit also includes quantitative Analysis and judge module, Utilize olefin gas to analyze software in image qualitative analysis module and image is analyzed being ultimately determined to afterwards alkene During appropriate hydrocarbon gas, the situation that olefin gas is leaked by this quantitative Analysis and judge module carries out quantitative Analysis and judgement, Determine alarm level and provide the information such as dynamic range of scatter and risk range.

Infrared thermography provides temp sensing function, has temperature to show on the infrared image forming target to be measured. In the preferred mode of another kind, this analytic unit also includes temperature sensing module, temperature sensing module bag Temperature shown by infrared image in region to be measured is detected by the temperature sensing software included, and monitors and divides Analysis, if it find that temperature raises, then uses quantitative Analysis to calculate the change of this temperature with judge module And judgement, start corresponding different grades of warning.

Alarm unit in the present embodiment includes that three grades of warning function modules, the respectively first order are reported to the police, second Level is reported to the police, third level danger warning.In alarm unit, also include that display device, display occur olefin gas The position that the position of leakage, the scope of olefin gas diffusion and temperature anomaly occur, it is simple to process in time.

In the monitoring system that the present embodiment is provided, including the spy for scene to be measured being carried out infrared imaging Survey unit, for image pre-analysis module imaging results being analyzed and monitor, for the gas to leakage Body carries out the image qualitative analysis module of qualitative analysis, and according to qualitative point of image pre-analysis module and image The control that olefin gas evaluator in infrared thermoviewer is controlled by the analysis result of analysis module is single with driving Unit, for leakage state be analyzed and calculate, it determines for different leak condition quantitative Analysis with Judge module, and there is the alarm unit of three grades of alarm modes.Each ingredient of this monitoring system is organic In conjunction with, scene to be measured is monitored accurately and effectively, can find that olefin gas leakage is reported to the police rapidly, and And corresponding different leak condition can start different alarm modes, can carry out not for different situations Same process, the monitoring to producing is more efficient and careful, it is ensured that the safety of production, prevents again false alarm band The loss come.Simultaneously in preferred mode, the temperature to scene to be measured of the temperature sensing module in analytic unit Degree monitors in real time, if it find that temperature raises, then uses quantitative Analysis and judge module to this temperature Change calculates and judges, starts the most different alarm modes, is further ensured that the high safety of production.

Embodiment four:

Next the monitoring method using the monitoring system in embodiment three that alkene is leaked is described in detail.Fig. 7 Flow chart for the method.As it is shown in fig. 7, first, thermal infrared imager does not start olefin gas evaluator, Namely the band pass filter of olefin gas evaluator is not in the light path of imaging, turning of olefin gas evaluator The empty window 6-1 of dish is just to Infrared Detectors 3, and (target herein is with the production scene in chemical industry place for detection target As a example by, but the invention is not restricted to this) and obtain infrared image, advantage of this is that and make lens group be pooled to The most being collected of infrared emanation energy, is unlikely to be stopped by band pass filter at the very start, these Infrared emanation energy is converted into the signal of telecommunication by focal plane arrays (FPA), demonstrates over the display through imaging circuit Infrared image clearly, advantageously in the monitoring to production scene safety.

The method judged is first to control to start encoder motor with the drive circuit in driver element, and rotation makes Band pass filter 6-3, makes band pass filter just to Infrared Detectors 3, detects infrared image, described image Qualitative analysis module is single to detection after starting the band pass filter 6-3 that centre wavelength is 10.1 ± 0.02 microns The image that unit is detected is analyzed, and whether analyzes gas to be measured by the band of described olefin gas evaluator Pass filter analyzes whether gas to be measured has passed through band pass filter 6-3.If do not passed through, it was demonstrated that this gas is not It is olefin gas, may be other gases such as steam, then control to pass through with the drive circuit in driver element Encoder electric machine rotation alkene evaluator rotating disk makes band pass filter 6-3 playback, and empty window 6-1 is just to infrared acquisition Device 3, whole monitoring system is returned to again normal monitoring state.If olefin gas analyzes software thinks gas to be measured Body has passed through band pass filter 6-3, then control and in driver element by encoder motor, rotate alkene and know Other device rotating disk, makes band pass filter 6-4 just to Infrared Detectors 3, and namely starting centre wavelength is 10.399 The band pass filter 6-4 of ± 0.02 micron, infrared thermoviewer detects infrared image, in described analytic unit Image qualitative analysis module is carried out point starting the image that probe unit is detected after band pass filter 6-4 Analysis and identification, analyze whether gas to be measured has passed through band pass filter 6-4.If do not passed through, it was demonstrated that this gas It not olefin gas, may be other gases such as steam, then control to lead to the drive circuit in driver element Crossing encoder electric machine rotation alkene evaluator rotating disk makes band pass filter 6-4 playback, and empty window 6-1 is just to infrared spy Surveying device 3, whole monitoring system is returned to again normal monitoring state.If olefin gas analyzes software thinks to be measured Gas has passed through band pass filter 6-4, then control and in driver element by encoder motor, rotate alkene Evaluator rotating disk, makes band pass filter 6-5 just to Infrared Detectors 3, and namely starting centre wavelength is 12.28 The band pass filter 6-5 of ± 0.02 micron, infrared thermoviewer detects infrared image, in described analytic unit Image qualitative analysis module is carried out point starting the image that probe unit is detected after band pass filter 6-5 Analysis and identification, analyze whether gas to be measured has passed through band pass filter 6-5.If do not passed through, it was demonstrated that this gas It not olefin gas, may be other gases such as steam, then control to lead to the drive circuit in driver element Crossing encoder electric machine rotation alkene evaluator rotating disk makes band pass filter 6-5 playback, and empty window 6-1 is just to infrared spy Surveying device 3, whole monitoring system is returned to again normal monitoring state.If passed through, it is believed that gas to be measured has alkene The feature of appropriate hydrocarbon gas, determines the gas characteristic that gas characteristic is olefin gas presented in Infrared image, sentences Break and leak for olefin gas, then alarm unit starts warning, and above flow process is as shown in Figure 4.Above description It is the situation of 3 filter plates, if 5 filter plates, then repeats above-mentioned process.Use such side Formula can judge it is olefin gas leakage exactly, prevents the generation of false alarm.Certainly, art technology Personnel can also select a piece of or band pass filter of two panels even more multi-disc, as long as being capable of alkene The identification of gas.

Compared with embodiment two, in the present embodiment, utilize image analysis software pair in image qualitative analysis module When image is analyzed being ultimately determined to olefin gas afterwards, then use quantitative Analysis and judge module to alkene The situation of gas leakage carries out quantitative Analysis and judgement, determine alarm level and be given dynamic range of scatter and The information such as risk range.

Described quantitative Analysis and judge module obtain after can utilizing the startup olefin gas evaluator that system inputs To infrared image the gas graphics area in region to be measured dynamically changed calculate, the mode of calculating is as follows:

First set:

The gas graphics area of any time point N in arbitrary monitoring region in Pn=picture；

Gas graphics area=the Z of the time point M delayed in Pm=same monitoring region；

Fx=lens group focal length；

Jx=lens group video angle；

Lx=lens group is to the spacing of target to be monitored；

Px=complete monitored picture area；

△ S=time variable=M-N；

△ P=area variable=Pm/Pn

In the case of a set of monitoring system determines, Fx, Jx, Lx, Px are fixing value, necessarily Time excursion in calculate the variable of gas graphics area, and preset the value of one group of trigger condition, As:

When △ S < the X second, △ P < Y1, Pm < during Z1, it is defined as minute leakage:

When △ S < the X second, Y1 < △ P < Y2, Z1 < Pm < during Z2, it is defined as persistently leaking:

As △ S<X second, △ P>Y2, Pm>Z2 time, be defined as instantaneous leak.

It follows that above-mentioned formula is explained by citing:

As first set X=5, the 20% of Y1=1, Y2=2, Z1=whole monitored picture area, Z2=is whole The 60% of monitored picture area.

That is, in the time range of 5s, the two width pictures that infrared thermography detects are compared, same The gas graphics area Pm of the time point M delayed in monitoring region is divided by monitoring region arbitrary in picture The value of the gas graphics area Pn of interior any time point N is less than 1, the namely gas of later time point M The image area of the previous time point of volume graphic area ratio is also little, and the gas figure of later time point M Shape area is less than the 20% of whole monitored picture area, it was demonstrated that the amount of gas leakage is the least, change in time Activating QI body have the trend dribbled, and gas graphics area is less than whole monitored picture area 20%, then it is assumed that this leakage is minute leakage, the alarm mode of follow-up employing is first order danger warning, carries The production monitoring personnel that wake up note.

If in the time range of set 5s, the two width pictures that infrared thermography detects are compared, The gas graphics area Pm of the time point M delayed in same monitoring region is divided by monitoring arbitrary in picture In region, the value of the gas graphics area Pn of any time point N is 1.5, between 1 and 2, it is simply that at 5s Time range in, the most previous time point of gas graphics area expands 50%, and later time The gas graphics area of some M accounts between the 20%-60% of whole monitored picture area, it was demonstrated that the amount of gas leakage It is bigger, then it is assumed that this leakage is for persistently to leak, and the alarm mode of follow-up employing is second level danger warning, Production monitoring personnel must immediately treat.

If in the time range of set 5s, the two width pictures that infrared thermography detects are compared, The gas graphics area Pm of the time point M delayed in same monitoring region is divided by monitoring arbitrary in picture In region, the value of the gas graphics area Pn of any time point N is 3, it is simply that in the time range of 5s, The most previous time point of gas graphics area expands 2 times, and the gas figure of later time point M Area is more than the 60% of whole monitored picture area, it was demonstrated that the amount of gas leakage is the biggest, then it is assumed that this leakage For instantaneous leak, the alarm mode of follow-up employing is third level danger warning, reminds production monitoring personnel urgent Process.

For above-mentioned three kinds of situations, alarm unit has three grades of warning function modules, when quantitative Analysis and judgement When module is judged as, by the change of gas image area, the condition meeting [instantaneous leak], three grades of warning merits Module can directly initiate third level danger warning, now screen display alarm information, emergency alarm sound and light alarm Device startup, screen Dynamic Announce gas range of scatter and risk range；If when quantitative Analysis and judge module When being met the condition of [persistently leakage)] by the change of gas image area, three grades of warning function modules open Dynamic second level danger warning, now screen display alarm information, the startup of warning alert audible-visual annunciator, screen Dynamic Announce gas range of scatter and risk range；If when quantitative Analysis and judge module are by gas image When the change of area meets the condition of [minute leakage], three grades of warning function modules start first order danger report Alert, now screen display alarm information.

Above citing is only the purpose of explanation, actually those skilled in the art can be according to the needs of monitoring X in setting formula, the value of Y1, Y2, Z1, Z2, define the scope of various leakage.

Image analysis software can freely be separated out most 64 independent monitored spaces in the complete picture of a width Territory, the infrared image analysis to each independent monitoring region, quantitative Analysis and judge module are to each independence The infrared image in monitoring region carries out quantitative Analysis and judgement, it is judged that the grade of gas leakage, and then triggers phase The warnings at different levels answered.So monitoring to target to be measured is accurate, it is possible to find the particular location that leakage occurs, It is easy to process in time, to the effective monitoring of target to be measured and careful.

Except above-mentioned quantitative Analysis and judge module are to determining that the change of gas image area in infrared image is carried out Outside amount calculates with judgement, this alarm device also includes the monitoring to target temperature to be measured and analysis.

Infrared thermography provides temp sensing function, has temperature to show on the infrared image forming target to be measured. In image analysis module in addition to including above-mentioned image analysis software, also include that temperature sensing module is to this The change of temperature detects and analyzes.

Owing in chemical industry place, organic compound can cause local temperature to become rapidly when gasification because of a large amount of heat absorptions Change, and when big flow leaks because of electrostatic initiation fire, thus cause local temperature to steeply rise.Cause This this temperature sensing module uses temperature sensing software detect the infrared image of target to be measured and analyze, Detection and the result analyzed are sent to quantitative Analysis and judge module, and quantitative Analysis and judge module find to reach During to alert if, the alarm module i.e. triggered in alarm unit is reported to the police.

Described quantitative Analysis and judge module utilize the result of detection of the temperature sensing module temperature to region to be measured Dynamically change calculates, before and after described variations in temperature is separated in time, and the rise of temperature, calculate Mode as follows:

First set:

Temperature maximum in arbitrary thermometric region in Tmax=picture；

The average temperature value of any time point N in arbitrary thermometric region in Tn=picture；

The average temperature value of the time point M delayed in Tm=same thermometric region；

△ S=time variable=M-N, takes any value within the X second in thermometric software；

△ T=temperature variable=Tm-Tn；

Set one group of value triggering temperature alarming condition, such as:

When any time point, during Tmax > E, start third level danger warning.

When, in the △ S time, during △ T > D2, starting second level danger warning.

When, in the △ S time, during D1 △ T D2, starting first order danger warning.

D=temperature gap；

It follows that above-mentioned formula is explained by citing:

As first set △ S=15s, D1=2 DEG C, D2=5 DEG C, E=160 DEG C is the trigger condition reported to the police.

That is, in the time range of 15s, the two width pictures that infrared thermography detects are compared,

The temperature gap measured in thermometric region is less than 5 DEG C, say, that in 15s, the temperature in thermometric region Increasing, but the temperature range raised is between 2 DEG C and 5 DEG C, the most now quantitative Analysis triggers with judge module First order danger warning.

The temperature gap measured in thermometric region is more than 5 DEG C, say, that in 15s, the temperature in thermometric region Raising more than 5 DEG C, the most now quantitative Analysis triggers second level danger warning with judge module.

If at any point in time, the temperature maximum Tmax measured in picture in arbitrary thermometric region is more than 160 DEG C, it is believed that occur in that unexpected exception, quantitative Analysis and judge module no longer carry out the calculating of variations in temperature, Directly trigger third level danger warning.

Changing three kinds of situations for said temperature, alarm unit has three grades of warning function modules, result temperature When detecting module detects the condition that temperature meets [Tmax > 160 DEG C], then quantitative Analysis is straight with judge module Connecing and directly initiate third level danger warning, now screen display alarm information, emergency alarm audible-visual annunciator open Dynamic, screen Dynamic Announce risk range；If the calculating of variations in temperature is met by quantitative Analysis with judge module During the condition of [when △ S<15 second, △ T>± 5 DEG C], three grades of warning function modules start second level danger reports Alert, now screen display alarm information, the startup of warning alert audible-visual annunciator, screen dynamic risk scope； If quantitative Analysis and judge module the result of calculation of variations in temperature is met [when △ S < 15 second, ± 2 DEG C △ T ± 5 DEG C] condition time, three grades of warning function modules start first order danger warnings, and now screen shows Show warning message.

Above citing is only the purpose of explanation, actually those skilled in the art can be according to the needs of monitoring △ S in setting formula, the value of D1, D2, E, definition triggers the condition of warnings at different levels.

Equally, temperature sensing module can freely be separated out most 64 independent prisons in the complete picture of a width Control region, detects the temperature of the infrared image in each independent monitoring region and analyzes, quantitative Analysis With judge module, the analysis result in each independent monitoring region is calculated, it is judged that alarm level triggers corresponding Warnings at different levels.So monitoring to target to be measured is accurate, it is possible to find that temperature raises the particular location occurred, It is easy to process in time, to the effective monitoring of target to be measured and careful.

Above-mentioned calculating gas graphics area change in target to be measured calculated and judge with variations in temperature with Judgement can be used in combination, when appointing in the gas area determining target mid-infrared image to be measured or temperature One when meeting alert if, then trigger warning.

It is to say, as a example by above-mentioned example, if temperature sensing result meets [Tmax > 160 DEG C] Condition or when quantitative Analysis and judge module are judged as meeting [instantaneous by the change of gas image area Leakage] condition time, three grades of warning function modules directly initiate third level danger warning；If quantitative Analysis With judge module, the calculating of variations in temperature is met the condition or quantitatively of [when △ S<15 second, △ T>± 5 DEG C] When calculating is judged as, by the change of gas image area, the condition meeting [persistently leakage] with judge module, Three grades of warning function modules start second level danger warning；If quantitative Analysis and judge module are to variations in temperature Calculating be judged as meeting the condition of [when △ S < 15 second, ± 2 DEG C of △ T ± 5 DEG C] or quantitative Analysis with When judge module is judged as, by the change of gas image area, the condition meeting [minute leakage], three grades of reports Alert functional module starts first order danger warning.

In the present embodiment, in the case of can be to determining and having olefin gas leakage, use quantitative Analysis and sentencing Disconnected module, is analyzed the state of leakage and calculates, it determines for the state of different leakages, using three grades The corresponding different leak condition of the pattern reported to the police starts different alarm modes, can enter for different situations The process that row is different, the monitoring to producing is more efficient and careful, and raising and safety for production efficiency are protected The reinforcement of barrier serves important function.

Embodiment five:

Present embodiment discloses the monitoring system of another kind of alkene leakage.Compared with embodiment three, the present embodiment Disclosed monitoring system also includes assisting in identifying module in analytic unit, and assisting in identifying functions of modules is by quilt The essential information of monitoring objective, dynamic environment information and the use visible ray means letter to same target monitoring Breath is incorporated in system, provides more data basis for quantitative analysis and calculating.Assist in identifying module mainly to locate The reason facility information of target to be monitored, work information, environmental information, visible image capturing machine information.

Facility information: the detailed technology parameter of target subject equipment is provided to system, equipment can be set up if desired 3D model.Can be the most relevant and auxiliary to equipment by observing leakage point position when analyzing olefin gas leakage Help and judge whether this leakage is olefin gas leakage.

Work information: dynamic, the detailed technical parameter of target to be monitored material is provided to system.In detection Quantitative Analysis and judgement can be carried out accordingly when leaking to olefin gas.

Environmental information: provide real-time to system by being arranged on the meteorological observation instrument near target to be monitored Environmental information including wind speed, wind direction, temperature.Can carry out accordingly when detecting olefin gas leakage Quantitative Analysis and judgement.

Visible image capturing machine information: infrared thermography can be designed to parallel with visible light camera be The visible light camera monitoring same target is maybe connected into native system by system.Comprehensive Correlation thermal-induced imagery and visible Light image is favorably improved the accuracy of olefin gas leak detection.

When image qualitative analysis module determines whether to leak for olefin gas, and quantitative analysis and calculating mould Block be judged as when which grade leaks introduce assist in identifying module can improve identify judge speed and accuracy.

Embodiment six:

Present embodiment discloses the monitoring system of another kind of alkene leakage.This monitoring system includes probe unit, This probe unit includes infrared thermography, described infrared thermography and the infrared thermal imaging in embodiment one The structure of instrument is identical, including camera lens, lens interface, olefin gas evaluator, Infrared Detectors and process electricity Road, encodes motor.In normal state, empty window 6-1 just to Infrared Detectors 3, now olefin gas identification Device does not start, and namely the band pass filter of olefin gas evaluator is not in the light path of imaging, detects mesh Mark (target herein is as a example by the production scene in chemical industry place, but the invention is not restricted to this) obtains infrared figure Picture, advantage of this is that the most being collected of the infrared emanation energy making lens group be pooled to, unlikely Being stopped by band pass filter at the very start, these infrared emanation energy are by Infrared Detectors i.e. burnt Planar array is converted into the signal of telecommunication, demonstrates infrared image clearly over the display through imaging circuit, more Add the monitoring beneficially to production scene safety.

When follow-up image pre-analysis module finds to detect in the case of not starting olefin gas evaluator When image has gas characteristic, send instruction can to the drive circuit in control unit, receive finger at circuit board When making, encoder motor 5 starts olefin gas evaluator, rotates band pass filter successively, to passed through Gas is filtered, and judges with the kind to gas.

The focal plane arrays (FPA) that the present embodiment mid-infrared detector 3 uses is the medium wave focal plane arrays (FPA) of 3-5 micron, Then the corresponding olefin gas evaluator used is medium wave olefin gas evaluator, specific through bands of a spectrum by 1-2 sheet Medium wave band pass filter composition.The plan structure schematic diagram of olefin gas evaluator as shown in Figure 8, at alkene There is on the rotating disk of appropriate hydrocarbon gas evaluator sky window 6-1, black matrix 6-2 equally, simply compared with there is embodiment one, Only there is two panels band pass filter 6-6 and 6-7.Those skilled in the art can be known, and Fig. 8 is only a kind of Schematic diagram, the actually position of band pass filter and interval from each other on olefin gas evaluator rotating disk Can change.

In the online monitoring system in chemical industry place, need whether the gas judging leakage exactly is alkene gas Body, if being only some harmless gases, such as the appearance of steam etc., judge inaccurate in the case of, If the gas that these are harmless being defined as olefin gas by mistake and reporting to the police, cause into the pause of production, can bring The biggest economic loss, in the present embodiment in order to avoid the appearance of above-mentioned situation, more accurately determining is alkene Appropriate hydrocarbon gas, uses the band pass filter of 2, and the centre wavelength position of described 2 band pass filters is respectively 3.24 ± 0.02 microns and 3.31 ± 0.02 microns.In the optional mode of another kind, it would however also be possible to employ in a piece of Heart wavelength location is 3.24 ± 0.02 microns or the band pass filter of 3.31 ± 0.02 microns.

This monitoring system also includes analytic unit, and the image detecting probe unit is analyzed, described spy Surveying unit and include image pre-analysis module and image qualitative analysis module, the pre-module of graphical analysis includes figure The image that described probe unit is detected by analysis software is analyzed, it may be judged whether for gas.

This monitoring system also includes controlling and driver element, and it is single that described control is connected described detection with driver element Unit and analytic unit, when the image pre-analysis module in analytic unit judges that the infrared image of detection target has During for gas characteristic, this control starts encoder motor, encoder motor with driver element by drive circuit Rotate olefin gas evaluator rotating disk, namely start olefin gas evaluator, make band pass filter just to red External detector 3, after starting olefin gas evaluator, probe unit carries out imaging to detection target, described Image qualitative analysis Module-embedding image analysis software in analytic unit, has olefin gas identification function, right Image after starting olefin gas evaluator is analyzed.As it was previously stated, lead at encoder electric machine rotation band During filter plate, band pass filter to stay for some time at detector surface, it is ensured that software can be in the logical filter of band Receiving at least 3 complete images under wave plate, the olefin gas in image qualitative analysis module analyzes software pair These images are analyzed, and whether analyze gas to be measured by the bandpass filter of described olefin gas evaluator. If as encoder motor 5 starts in the present embodiment, first rotate band pass filter 6-6, make bandpass filtering Sheet 6-6 is just on Infrared Detectors 3, in the light path of infrared imaging, and infrared image formed by gas to be measured It is analyzed by the image analysis software in image qualitative analysis module, if it is considered to gas to be measured is logical by band Filter plate, then the drive circuit in control unit gives an order, and encoder motor 5 starts, rotational band pass filter Sheet 6-7, if image qualitative analysis module thinks that gas to be measured is not over band pass filter 6-6, then it is assumed that This gas is not olefin gas, stops the qualitative analysis to gas, and encoder motor 5 makes sky window 6-1 the most right Infrared Detectors 3, is returned to normal monitor state.

If gas to be measured can be all by two above-mentioned band pass filters, it is determined that be for olefin gas.

In the preferred mode of one, analytic unit also includes quantitative Analysis and judge module, fixed at image Property analyze module when utilizing image analysis software that image is analyzed be ultimately determined to olefin gas afterwards, should The situation that olefin gas is leaked by quantitative Analysis and judge module carries out quantitative Analysis and judgement, determines warning etc. Level also provides the information such as dynamic range of scatter and risk range.

Infrared thermography provides temp sensing function, has temperature to show on the infrared image forming target to be measured. In the preferred mode of another kind, this analytic unit also includes temperature sensing module, in region to be measured Temperature shown by infrared image detects, and monitors and analyzes, if it find that temperature raises, then it is fixed to use The change of this temperature is calculated and judges by amount calculating and judge module, starts the most different alarm modes.

Alarm unit in the present embodiment includes that three grades of warning function modules, respectively minute leakage are reported to the police, and holds Continuous leakage alarm, instantaneous leak is reported to the police.

In the monitoring system that the present embodiment is provided, including the spy for scene to be measured being carried out infrared imaging Survey unit, for image pre-analysis module imaging results being analyzed and monitor, for the gas to leakage Body carries out the image qualitative analysis module of qualitative analysis, and according to qualitative point of image pre-analysis module and image The control that olefin gas evaluator in infrared thermoviewer is controlled by the analysis result of analysis module is single with driving Unit, for being analyzed the state of leakage and calculate, it determines for the quantitative Analysis of the state of different leakages With judge module, and there is the alarm unit of three grades of alarm modes.Each ingredient of this monitoring system has Machine combines, and monitors scene to be measured accurately and effectively, can find that olefin gas leakage is reported to the police rapidly, And corresponding different leak condition can start different alarm modes, can carry out for different situations Different process, the monitoring to producing is more efficient and careful, it is ensured that the safety of production, prevents again false alarm The loss brought.Simultaneously in preferred mode, the temperature sensing module in image pre-analysis module is to be measured On-the-spot temperature monitors in real time, reports to the police rapidly when there being unexpected ramp case, prevents unexpected intensification from causing Security incident, it is ensured that the high safety of production.

Embodiment seven:

Next the monitoring method using the monitoring system in embodiment six that alkene is leaked is described in detail.First, First thermal infrared imager does not start olefin gas evaluator, and thermal infrared imager does not start olefin gas evaluator, Namely the band pass filter of olefin gas evaluator is not in the light path of imaging, turning of olefin gas evaluator The empty window 6-1 of dish is just to Infrared Detectors 3, and (target herein is with the production scene in chemical industry place for detection target As a example by, but the invention is not restricted to this) and obtain infrared image, advantage of this is that and make lens group be pooled to The most being collected of infrared emanation energy, is unlikely to be stopped by band pass filter at the very start, these Infrared emanation energy is converted into the signal of telecommunication by focal plane arrays (FPA), demonstrates over the display through imaging circuit Infrared image clearly, advantageously in the monitoring to production scene safety.

The method judged is first to control to start encoder motor with the drive circuit in driver element, and rotation makes Band pass filter 6-6, makes band pass filter 6-6 just to Infrared Detectors 3, detects infrared image, described Image qualitative analysis module is visited after starting the band pass filter 6-6 that centre wavelength is 3.24 ± 0.02 microns The image that survey unit is detected is analyzed and identifies, analyzes whether gas to be measured has passed through band pass filter 6-6, if do not passed through, it was demonstrated that this gas is not olefin gas, may be other gases such as steam, then control Drive circuit in system and driver element makes band pass filter by encoder electric machine rotation alkene evaluator rotating disk 6-6 playbacks, and empty window 6-1 is just to Infrared Detectors 3, and whole monitoring system is returned to again normal monitoring state. If olefin gas analyzes software thinks that gas to be measured has passed through band pass filter 6-6, then control and driver element In by encoder motor, rotate alkene evaluator rotating disk, make band pass filter 6-7 just to infrared acquisition Device 3, namely starts the band pass filter 6-7 that centre wavelength is 3.31 ± 0.02 microns, and infrared thermoviewer is visited Measure infrared image, the image qualitative analysis module in described analytic unit to start band pass filter 6-4 it The image that rear probe unit is detected is analyzed and identifies, analyzes whether gas to be measured has passed through the logical filter of band Wave plate 6-7, if do not passed through, it was demonstrated that this gas is not olefin gas, may be steam, carbon dioxide etc. Other gases, then control to be turned by encoder electric machine rotation alkene evaluator with the drive circuit in driver element Dish makes band pass filter 6-7 playback, and empty window 6-1 is just to Infrared Detectors 3, and whole monitoring system is returned to again Normal monitoring state.If olefin gas analyzes software thinks that gas to be measured has passed through band pass filter 6-7, recognize There is for gas to be measured the feature of olefin gas, determine that the gas characteristic presented in Infrared image is alkene gas The gas characteristic of body, it is judged that leak for olefin gas.Certainly, those skilled in the art can also select a piece of Medium wave band pass filter, as long as being capable of the identification to olefin gas.

In the present embodiment, in the present embodiment, utilize image analysis software to image in image qualitative analysis module When being analyzed being ultimately determined to olefin gas afterwards, then use quantitative Analysis and judge module to olefin gas The situation of leakage carries out quantitative Analysis and judgement, determines alarm level and provides dynamic range of scatter and danger The information such as scope.

First set:

Fx=lens group focal length；

Jx=lens group video angle；

Lx=lens group is to the spacing of target to be monitored；

Px=complete monitored picture area；

△ S=time variable=M-N；

△ P=area variable=Pm/Pn

As △ S<X second, △ P>Y2, Pm>Z2 time, be defined as instantaneous leak.

It follows that above-mentioned formula is explained by citing:

Image analysis software can freely be separated out most 64 independent monitored spaces in the complete picture of a width Territory, the infrared image analysis to each independent monitoring region, quantitative Analysis and judge module are to each independence The infrared image in monitoring region carries out quantitative Analysis and judgement, it is judged that the grade of gas leakage, and then triggers phase The warnings at different levels answered.So monitoring to target to be measured is accurate, timely and careful.

First set:

Temperature maximum in arbitrary thermometric region in Tmax=picture；

△ T=temperature variable=Tm-Tn；

Set one group of value triggering temperature alarming condition, such as:

When any time point, during Tmax > E, start third level danger warning.

D=temperature gap；

It follows that above-mentioned formula is explained by citing:

Equally, temperature sensing module can freely be separated out most 64 independent prisons in the complete picture of a width Control region, detects the temperature of the infrared image in each independent monitoring region and analyzes, quantitative Analysis With judge module, the analysis result in each independent monitoring region is calculated, it is judged that alarm level triggers corresponding Warnings at different levels.So monitoring to target to be measured is accurate, timely and careful.

Analytic unit is by having data-handling capacity in this manual, it is possible to run the computer system of software Implement.Described image pre-analysis module, image qualitative analysis module, quantitative Analysis and judge module, temperature Detecting module, assist in identifying module, warning function module can be integrated into the firmware in this computer system, Can also be the software can being separated with computer system.

Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art Row various obvious changes, readjust and substitute without departing from protection scope of the present invention.Therefore, though So by above example, the present invention is described in further detail, but the present invention be not limited only to Upper embodiment, without departing from the inventive concept, it is also possible to include other Equivalent embodiments more, And the scope of the present invention is determined by scope of the appended claims.

Claims

1. a monitoring system for olefin gas leakage, including:

Probe unit, including infrared thermography, comprises olefin gas evaluator in described infrared thermography, Described probe unit is for detecting and imaging region to be measured；

Analytic unit, including image pre-analysis module and image qualitative analysis module, image pre-analysis module bag Include the image that described probe unit before starting olefin gas evaluator is detected to be analyzed, it may be judged whether For gas, described probe unit after the startup of olefin gas evaluator is detected by image qualitative analysis module Image is identified and analyzes, it may be judged whether for olefin gas；

Described olefin gas evaluator includes rotating disk, and the black matrix that is arranged on rotating disk and multiple identification alkene gas The band pass filter of body, drives the rotating disk of olefin gas evaluator to switch described black matrix by encoder motor With multiple band pass filters；

Control and driver element, connect described probe unit and analytic unit, tie according to the analysis of analytic unit Fruit controls and drives the olefin gas evaluator in probe unit；

Alarm unit, connects described analytic unit, reports to the police according to the analysis result of described analytic unit.

2. the monitoring system of olefin gas leakage as claimed in claim 1, wherein, in described analytic unit Also include that quantitative Analysis and judge module, quantitative Analysis and judge module include the triggering warning at different levels preset Condition, the infrared image gas after image qualitative analysis module carries out qualitative analysis, to region to be measured The change of area calculates and judges, starts different types of warning, the image area change of described gas Be calculated as separated in time before and after, gas image area change ratio.

3. the monitoring system of olefin gas leakage as claimed in claim 1, wherein, image qualitative analysis mould Whether block analysis gas to be measured is by the band pass filter of described olefin gas evaluator, when judging gas to be measured During by band pass filter, determine that gas to be measured is olefin gas.

4. the monitoring system of olefin gas leakage as claimed in claim 1, wherein, in described analytic unit Also include that the temperature of the infrared image in region to be measured is visited by temperature sensing module, described temperature sensing module Survey and analyze.

5. the monitoring system of olefin gas leakage as claimed in claim 4, wherein, in described analytic unit Also include that quantitative Analysis and judge module, quantitative Analysis and judge module include the triggering warning at different levels preset Condition, during monitoring, the variations in temperature showing the infrared image in region to be measured calculates and sentences Disconnected, start different types of warning.

6. the monitoring system of the olefin gas leakage as described in arbitrary in claim 1-5, wherein, described alkene Appropriate hydrocarbon gas evaluator includes rotating disk, and the band pass filter being arranged on rotating disk and empty window.

7. the monitoring system of olefin gas leakage as claimed in claim 6, wherein, described olefin gas is known Other device includes 3-5 length of a film ripple band pass filter or 2 medium wave band pass filters.

8. the monitoring system of olefin gas leakage as claimed in claim 6, wherein, described olefin gas is known Other device includes 3 length of a film ripple band pass filters, its centre wavelength is respectively 10.1 ± 0.02,10.399 ± 0.02, 12.28 ± 0.02 micron；Or described olefin gas evaluator includes 5 length of a film ripple band pass filters, its Centre wavelength is respectively 10.1 ± 0.02,10.37 ± 0.02,10.399 ± 0.02,11.24 ± 0.02,12.28 ± 0.02 micron；Or described olefin gas evaluator includes 2 medium wave band pass filters, wherein cardiac waves Long 3.24 ± 0.02,3.31 ± 0.02 microns respectively.

9. the monitoring system of the olefin gas leakage as described in claim 2 or 5, wherein, described list of reporting to the police Unit includes three grades of warning function modules.

10. the monitoring system of the olefin gas leakage as described in arbitrary in claim 1-5, wherein, this point Analysis unit also includes assisting in identifying module, and this information assisting in identifying resume module has the equipment in region to be measured to believe One or more in breath, work information, environmental information, visible ray camera information.

The monitoring system of the 11. olefin gas leakages as described in arbitrary in claim 1-5, wherein, described Alarm unit also includes display device, to show the position that olefin gas leakage or temperature anomaly occur.

The monitoring system of the 12. olefin gas leakages as described in arbitrary in claim 1-5, wherein, also wraps Include the explosion-proof and power supply unit being connected with probe unit.

The monitoring method of 13. 1 kinds of olefin gas leakages, comprises the following steps:

Use the infrared thermography detection target in probe unit, it is thus achieved that infrared image；

Use image pre-analysis module that the infrared image obtained is analyzed；

According to the analysis result of image pre-analysis module, when being found to have gas, control to start red with driver element Olefin gas evaluator in outer thermal imaging system, carries out image detection, and image qualitative analysis module is to being detected Image be identified and analyze, it may be judged whether for olefin gas leak；

When determine be olefin gas leakage time, use alarm unit report to the police.

The monitoring method of 14. olefin gas as claimed in claim 13 leakages, wherein, described image is qualitative The image detected is identified by analysis module and analysis includes, whether analyze gas to be measured by described The band pass filter of olefin gas evaluator, when judging gas to be measured by band pass filter, determines to be measured Gas is olefin gas.

The monitoring method of 15. olefin gas as claimed in claim 13 leakages, wherein, is being judged as alkene After gas leakage, also include using quantitative Analysis and the judge module infrared image gas area to region to be measured Change calculate and judge, start different types of warning, the meter of the image area of described gas change Before and after calculating as separated in time, the ratio of gas image area change.

The monitoring method of 16. olefin gas as claimed in claim 13 leakages, also includes using temperature sensing The temperature of the infrared image in region to be measured is detected and analyzes by module.

The monitoring method of 17. olefin gas as claimed in claim 16 leakages, the most also includes using quantitatively Calculating and judge module, the variations in temperature showing the infrared image in region to be measured calculates and judges, opens Dynamic different types of warning.

The monitoring method of the 18. olefin gas leakages as described in arbitrary in claim 13-17, wherein, institute State olefin gas evaluator and include 3 length of a film ripple band pass filters or 2 medium wave band pass filters.

The monitoring method of 19. olefin gas as claimed in claim 18 leakages, wherein, qualitative point of image The image detected is identified and analyzes by analysis module, whether analyzes gas to be measured by described olefin gas During the band pass filter of evaluator, it is analyzed according to band pass filter centre wavelength order from small to large.

The monitoring method of the 20. olefin gas leakages as described in arbitrary in claim 13-17, wherein, institute State olefin gas evaluator and include 3 length of a film ripple band pass filters, its centre wavelength is respectively 10.1 ± 0.02, 10.399 ± 0.02,12.28 ± 0.02 microns；Or described olefin gas evaluator includes 5 length of a film wavestrips Pass filter sheet, its centre wavelength is respectively 10.1 ± 0.02,10.37 ± 0.02,10.399 ± 0.02,11.24 ± 0.02,12.28 ± 0.02 microns；Or described olefin gas evaluator includes the logical filter of 2 middle wavestrips Wave plate, its centre wavelength 3.24 ± 0.02,3.31 ± 0.02 microns respectively.