CN101587069B - Oil mist detector - Google Patents
Oil mist detector Download PDFInfo
- Publication number
- CN101587069B CN101587069B CN2008101832692A CN200810183269A CN101587069B CN 101587069 B CN101587069 B CN 101587069B CN 2008101832692 A CN2008101832692 A CN 2008101832692A CN 200810183269 A CN200810183269 A CN 200810183269A CN 101587069 B CN101587069 B CN 101587069B
- Authority
- CN
- China
- Prior art keywords
- oil
- infrared
- mist
- infrared ray
- oil mist
- 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
- 239000003595 mist Substances 0.000 title claims abstract description 59
- 239000000428 dust Substances 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000005855 radiation Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 93
- 239000012530 fluid Substances 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 239000000284 extract Substances 0.000 description 3
- 230000001427 coherent effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003305 oil spill Substances 0.000 description 1
- 230000001314 paroxysmal effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention concerns an oil mist detector which detects and measures the concentration of oil mist (oil vapor) which continuously flows into the engine room of a ship by a small fan in orderto more accurately detect and/or measure the concentration of the oil mist (oil vapor) by applying a method using the strength of dispersed light from an infrared ray source. The oil mist detector co mprises: at least one infrared radiation source (light source element) (2): at least one infrared sensor (light detection element) (3, 4), wherein each infrared sensor has a primary infrared sensor (3) and a secondary infrared sensor (4) which are respectively arranged in a horizontal line and vertical line in relation to the infrared radiation source (2) while the infrared rays are radiating or when the infrared rays start radiating; and a terminal box (6) for covering a microprocessor (5) which compares the strength of the infrared rays detected by each infrared sensor. Accordingly, the oil mist detector can measure the concentration of the oil mist (oil vapor) detected by the infrared sensor.
Description
Technical field
The present invention relates to a kind of pick-up unit that is used for measuring and/or detecting mechanical indoor mist of oil (oil vapour) concentration of boats and ships special use, more specifically, relate to the oil dust detector that a kind of method of utilizing the scattered light intensity of measuring the infrared source to measure more exactly and/or detect mist of oil (oil vapour) concentration.
Background technology
In general, normally navigate by water in order to ensure boats and ships, need a large amount of oil in the Machine Room, for safety management is carried out in the Machine Room, the mist of oil that distributes in the mechanical room atmosphere (oil vapour) concentration will remain on below the certain level.If appearance such as oil pump or petroleum pipeline leak cause oil spill because of high temperature evaporation in atmosphere, may cause major accident.
Therefore, accurately detecting the mist of oil that distributes in the atmosphere, grasp oil mist concentration in real time, is the important channel that the prevention security incident takes place.
For example, preferably can be before the fault or fire generation of burst, the potential safety hazard of accurate determination techniques equipment, and for example, there are a large amount of dusts in the machinery room atmosphere, be blast or the fire that the measuring error avoiding so occur or run-time error cause, prevent to survey the infrared source (light source) of mist of oil (oil vapour) concentration and the pollution of sensor (photodetector) is very important.
For above-mentioned reasons, proposed multiple by detecting equipment and the system of oil mist concentration so that mist of oil is monitored.
As an example of above-mentioned existing equipment or system, once proposed a kind ofly by being connected to crankcase by port, and be connected to the system that a plurality of solenoid electric valves in remote detection chamber are formed by conduit.
Though above-mentioned solenoid electric valve carries out mist of oil sampling from each port continuously need move a certain distance because the mist of oil sample arrives test chamber, not only the measurement to each port has delay, and the mist of oil in the moving process condense also can make measure not accurate enough.
The measuring error that is associated with the delay that causes owing to the mist of oil sample mode recurs, and can make system's operate as normal a period of time that paroxysmal fault takes place afterwards.
That is to say, if there is not above-mentioned anti-pollution measure, because the pollution that other oil beyond the mist of oil causes can cause a large amount of error messages.
Therefore, if mistake often appears in testing result, and the technician fails to draw attention, and can cause problem to occur for a long time all can't obtaining confirming.
Meeting initiation fire or fault cause the person and property loss like this.
In order to address the above problem, No. 629915 (patent name: provide a kind of new method mist of oil measuring density system) of korean registered patent of the applicant's application, this method is used for extracting the mist of oil sample with real-time monitoring relevant information from crankcase, and this method can also and be revised the coherent detection result according to the oil mass variation that deposits on the sensor simultaneously.
The mist of oil measuring density system that the korean registered patent of the applicant application provides for No. 629915 comprises: be used for extracting mist of oil and described mist of oil being re-entered the circulating device of crankcase from engine crankcase continuously by small-sized fans; By the device that plural at least radioactive source and plural radioactive ray receiver constitute, each receiver during the whole radioactive ray radiation cycle or the radiation moment on the central vertical line between radioactive source and the receiver; The printed circuit board microprocessor that is used for the more different detected intensity of radiations of receiver; The terminal shielding box that described microprocessor is shielded; Be used for the mist of oil that extraction element extracts is sampled with the sensor station of the density of measuring described mist of oil; Be connected with the microprocessor at described sensor station, be used to write down and preserve the control and the image display device of the remote supervision system of the information that described sensor station provides; And be connected with the control and the image display device of described remote supervision system, be used for the subordinate display that full images shows the working site situation.
Though the mist of oil measuring density system that the korean registered patent of the applicant application provides for No. 629915 can extract the mist of oil sample, monitor relevant information and change and the coherent detection result is revised according to the oil mass that sensor deposits in real time from crankcase, but, cause the confidence level of oil mist concentration detection accuracy to descend to some extent because accuracy of detection is not high.
Summary of the invention
The objective of the invention is the existing problem of mist of oil measuring density system that the korean registered patent at above-mentioned the applicant application relates to for No. 629915, a kind of novel oil dust detector is provided.Specifically, according to the bernoulli theorem, in mist of oil (oil vapour) path, when fluid flow through narrower path, fluid velocity increased, and when fluid flow through the broad path, fluid velocity reduced; Fluid velocity increases; pressure will reduce; otherwise then pressure increases; therefore; the objective of the invention is to make mist of oil (oil vapour) sample in narrow path, to flow fast; thereby can not go up deposition greasy dirt and dust in the infrared source (light source) of detecting mist of oil (oil vapour) concentration and infrared ray sensor (photodetector); protection infrared source and infrared ray sensor are not contaminated; to extract mist of oil exactly from the Machine Room and to detect in real time, can also revise testing result according to greasy dirt deposition on the sensor simultaneously.
For achieving the above object, oil dust detector provided by the invention detects to measure the concentration of described mist of oil from the indoor extraction mist of oil of ship machinery (oil vapour) continuously by small-sized fans, this oil dust detector comprises: at least one infrared source (light source) and more than one infrared ray sensor (photodetector), each infrared ray sensor (photodetector) during the whole infrared cycle or the T-time be separately positioned on the horizontal line and perpendicular line identical with the infrared source; Microprocessor is used for the detected infra-red intensity of different infrared ray sensor (photodetector) is compared; And the terminal shielding box, be used to shield described microprocessor; Come the concentration of the mist of oil (oil vapour) that Detection and Extraction arrive by above-mentioned infrared ray sensor.
Preferably, described infrared source and infrared ray sensor are arranged on the inside cavity with inflow entrance and escape hole, and the diameter of described inflow entrance and escape hole is greater than the size at infrared source and position, infrared ray sensor place.
More preferably; described inside cavity be fixed with the coaxial first relative infrared ray sensor in infrared source and with rectangular second infrared ray sensor in infrared source; described escape hole is provided with the suction fan that is made of small-sized fans, and cavity itself then is arranged on the protective cover inside at terminal shielding box place.
More preferably; the front portion of described protective cover is provided with by the luminous relay indicating light of representing whether to work, detects pilot lamp and alarm lamp; the rear portion of described protective cover is provided with the signal jointing of outwards drawing from terminal shielding box and/or microprocessor; the bottom surface of described protective cover is formed with stator, and described stator combines with frame in being fixed on the Machine Room by axle.
Oil dust detector provided by the invention improves in the mist of oil measuring density system that the korean registered patent of first to file relates to for No. 629915 the applicant, according to the bernoulli theorem, in mist of oil (oil vapour) path, when fluid flows through narrower path, fluid velocity increases, and when fluid flow through the broad path, fluid velocity reduced; Fluid velocity increases, and then pressure reduces, otherwise then pressure increases; Therefore; mist of oil (oil vapour) sample is flowed in narrow path fast; thereby can not go up deposition greasy dirt and dust in the infrared source (light source) of detecting mist of oil (oil vapour) concentration and infrared ray sensor (photodetector); protection infrared source and infrared ray sensor are not contaminated; can extract mist of oil exactly from the Machine Room thus, can also revise testing result according to the greasy dirt deposition on the sensor simultaneously to detect in real time.
Description of drawings
Fig. 1 be the preferred embodiment for the present invention provide the diagrammatic cross-section of oil dust detector;
Fig. 2 be the preferred embodiment for the present invention provide the mist of oil (oil vapour) of oil dust detector detect principle schematic;
Fig. 3 be the preferred embodiment for the present invention provide the side view of oil dust detector;
Fig. 4 be the preferred embodiment for the present invention provide the front elevation of oil dust detector;
Fig. 5 be the preferred embodiment for the present invention provide the rear view of oil dust detector; And
Fig. 6 be the preferred embodiment for the present invention provide the user mode synoptic diagram of oil dust detector.
Description of reference numerals
1: detecting device 2: the infrared source
4: the second infrared ray sensors of 3: the first infrared ray sensors
5: microprocessor 6: electric signal cable splicing ear
7: inflow entrance 8: escape hole
9: cavity 10: suction fan
11: protective cover 12: cable connection joint
13: fixed support 14: set bolt
15: stator 16: long-distance monitorng device
17: image display 18: cable coupling box
19: relay indicating light 20: alarm lamp
21: detect pilot lamp
Embodiment
Below in conjunction with accompanying drawing the oil dust detector that the preferred embodiment for the present invention relates to is elaborated.
Extremely shown in Figure 6 as Fig. 1, the oil dust detector 1 that the preferred embodiment for the present invention relates to, detect to measure the concentration of described mist of oil from the indoor extraction mist of oil of ship machinery (oil vapour) continuously by small-sized fans, this oil dust detector 1 comprises: at least more than one infrared source (light source) 2 and more than one infrared ray sensor (photodetector), each infrared ray sensor is separately positioned on the horizontal line and perpendicular line identical with described infrared source 2 during the whole infrared cycle or the T-time; Microprocessor 5 is used for the detected infra-red intensity of different infrared ray sensors is compared; Terminal shielding box 6 is used to shield described microprocessor 5; Detect the concentration of the mist of oil (oil vapour) that is extracted by described infrared ray sensor.
Described infrared source 2 and infrared ray sensor are arranged on cavity 9 inside with inflow entrance 7 and escape hole 8, and the diameter of described inflow entrance 7 and escape hole 8 is greater than the size at described infrared source 2 and position, infrared ray sensor place.
Described cavity 9 internal fixation have with the infrared source 2 coaxial first relative infrared ray sensors 3 and with infrared source 2 rectangular second infrared ray sensors 4; described escape hole 8 is provided with the suction fan 10 that is made of small-sized fans, and cavity 9 itself then is arranged on protective cover 11 inside at terminal shielding box 6 places.
The front portion of described protective cover 11 is provided with by luminous to be represented relay indicating light 19, the alarm lamp 20 of whether working and detects pilot lamp 21; the rear portion of described protective cover 11 is provided with the cable connection joint 12 of outwards drawing from terminal shielding box 6 and/or microprocessor 5; the bottom surface of described protective cover 11 is formed with stator 15, and this stator 15 combines with frame 13 in being fixed on the Machine Room by axle 14.
When constituting mist of oil (oil vapour) concentration monitor system, described microprocessor 5 is connected with image display 17 with the long-distance monitorng device 16 of the information that record and preservation infrared ray sensor provide; Described long-distance monitorng device 16 shows that with image display 17 and full images the remote display of working site situation is connected.
Can in the Machine Room, dispose the oil dust detector 1 that a plurality of present embodiments with said structure provide, to be used to detect oil mist concentration.
In addition, detecting device 1 is connected with long-distance monitorng device 16 by cable connection joint 12, makes long-distance monitorng device 16 continue to monitor oil mist concentration by cable and cable coupling box 18, simultaneously, by signal-transmitting cable, 17 pairs of mist of oils of image display (oil vapour) are monitored.
When the infrared sources 2 that are provided with in the cavity 9 of the detecting device 1 that mist of oil (oil vapour) provides by present embodiment and each infrared ray sensor central authorities, can produce scattering phenomenon because of the mist of oil that passes through from the light that is positioned at infrared source 2 emissions on the horizontal line.
Scattered light intensity with mist of oil (oil vapour) fluctuations in discharge is input to microprocessor 5 by infrared ray sensor with analog signal form, and is converted to digital signal by A/D converter, is input to long-distance monitorng device 16 afterwards.
Thus, microprocessor 5 will to Different Red outside line sensor to scattered light intensity compare.
Because two infrared ray sensors equate that with infrared source 2 distances the detected scattered light intensity of each infrared ray sensor shows with identical indicating value with respect to mist of oil (oil vapour) concentration.
When the scattered light intensity that incides certain infrared ray sensor surpasses predefined scope, will on alarm lamp 20 and long-distance monitorng device 16, report to the police.
In addition, when the testing result of the scattered light intensity that incides another infrared ray sensor surpasses the measurement range of regulation, will report to the police on the detection pilot lamp 21 of cavity 9 and long-distance monitorng device 16, demonstration makes a mistake.
In addition, when cavity 9 needs to clean, can also point out the staff.
As mentioned above; the technical characterstic of oil dust detector provided by the invention is to utilize the bernoulli theorem to prevent contaminated with oil mist in mist of oil (oil vapour) path; the present invention is not limited to above-mentioned specific preferred implementation; in the scope that does not break away from the technology of the present invention thought; the various deformation that it will be appreciated by those skilled in the art that described embodiment is still within the scope of claim protection of the present invention.
Claims (1)
1. one kind is used for by small-sized fans continuously from the oil dust detector of the indoor extraction mist of oil of ship machinery with the concentration of measuring described mist of oil, and this oil dust detector comprises:
An infrared source and two infrared ray sensors, two described infrared ray sensors are separately positioned on the horizontal line and perpendicular line identical with described infrared source during the whole infrared cycle or the T-time;
Microprocessor is used for being compared by the detected infra-red intensity of different infrared ray sensors; And
The terminal shielding box is used to shield described microprocessor;
Wherein, described infrared source and described infrared ray sensor are arranged on the inside cavity with inflow entrance and escape hole, and the diameter of described inflow entrance and described escape hole is greater than the size at described infrared source and position, described infrared ray sensor place.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080048012 | 2008-05-23 | ||
| KR1020080048012A KR100880147B1 (en) | 2008-05-23 | 2008-05-23 | A oil mist detector |
| KR10-2008-0048012 | 2008-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101587069A CN101587069A (en) | 2009-11-25 |
| CN101587069B true CN101587069B (en) | 2011-03-16 |
Family
ID=40483062
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008201833525U Expired - Fee Related CN201464363U (en) | 2008-05-23 | 2008-12-12 | Oil mist detector |
| CN2008101832692A Active CN101587069B (en) | 2008-05-23 | 2008-12-12 | Oil mist detector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008201833525U Expired - Fee Related CN201464363U (en) | 2008-05-23 | 2008-12-12 | Oil mist detector |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100880147B1 (en) |
| CN (2) | CN201464363U (en) |
| WO (1) | WO2009142451A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880147B1 (en) * | 2008-05-23 | 2009-01-23 | 주식회사 스펙스 | A oil mist detector |
| CN110803404B (en) * | 2019-12-13 | 2024-05-14 | 江苏德大石化科技有限公司 | Integrated nitrogen injection oxygen control fireproof intelligent device |
| KR102511231B1 (en) * | 2021-10-22 | 2023-03-17 | 한국광기술원 | Apparatus for portable oil vapor monitoring and construction site oil vapor monitoring system using the same |
| CN115976664A (en) * | 2022-11-30 | 2023-04-18 | 无锡金通高纤股份有限公司 | Preparation method of fine monofilament with uniform oil content |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060060787A1 (en) * | 2004-09-22 | 2006-03-23 | Miox Corporation | Carbonate scale detector |
| CN201464363U (en) * | 2008-05-23 | 2010-05-12 | 株式会社斯派克斯 | Oil mist detector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687327A (en) * | 1985-02-25 | 1987-08-18 | The Dow Chemical Company | Oil mist monitor |
| JPH05249038A (en) * | 1992-03-06 | 1993-09-28 | Tabai Espec Corp | Oil mist concentration measuring apparatus |
| US20020104967A1 (en) | 2001-02-06 | 2002-08-08 | Spx Corporation | Gas sensor based on energy absorption |
| JP3840470B2 (en) * | 2003-12-03 | 2006-11-01 | 株式会社堀場製作所 | Oil mist detection device |
-
2008
- 2008-05-23 KR KR1020080048012A patent/KR100880147B1/en active IP Right Grant
- 2008-12-12 CN CN2008201833525U patent/CN201464363U/en not_active Expired - Fee Related
- 2008-12-12 CN CN2008101832692A patent/CN101587069B/en active Active
-
2009
- 2009-05-22 WO PCT/KR2009/002705 patent/WO2009142451A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060060787A1 (en) * | 2004-09-22 | 2006-03-23 | Miox Corporation | Carbonate scale detector |
| CN201464363U (en) * | 2008-05-23 | 2010-05-12 | 株式会社斯派克斯 | Oil mist detector |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-249038A 1993.09.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100880147B1 (en) | 2009-01-23 |
| CN201464363U (en) | 2010-05-12 |
| WO2009142451A3 (en) | 2010-03-11 |
| CN101587069A (en) | 2009-11-25 |
| WO2009142451A2 (en) | 2009-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108006439B (en) | Chemical dangerous gas leakage ground-air integrated monitoring and early warning technology and equipment | |
| US5390530A (en) | Leak detection method for gas, steam or the like based, in part, on the measurement of wind direction and velocity | |
| CN101587069B (en) | Oil mist detector | |
| EP3800465A1 (en) | A system and method of sensing for petroleum, oil, and gas leaks using optical detection | |
| JP2016161397A (en) | Fluid leakage detector | |
| CN103512988B (en) | Portable natural gas and methane gas optical detection device and identification method for natural gas and methane gas | |
| US5535253A (en) | Method and device for detecting leaks in penetrations of a nuclear reactor vessel head during operation | |
| CN104091415B (en) | A kind of laser methane gas leak detection method with camera function and device | |
| CN114263501A (en) | Tunnel water seepage and water burst monitoring system based on image recognition and thermal infrared combination | |
| CN110595973A (en) | Mine dust monitoring method based on image | |
| JP2740718B2 (en) | Leakage point and leak amount estimation system for gas, steam, etc. | |
| CN102353457A (en) | Distributed spectrum temperature measuring device for cloud and mist explosion field | |
| CN106018418A (en) | Detection system and method of existing building curtain wall | |
| CN210889031U (en) | Colliery is belt fire early warning system in pit | |
| CN108364283A (en) | A kind of pump sealing leak monitoring and localization method | |
| CN205788608U (en) | Temperature flue gas sensing detector | |
| CN110500138B (en) | Colliery belt conflagration early warning system in pit | |
| CN206096497U (en) | Danger source detection system | |
| TWI707132B (en) | Gas measurement method of tunnel space infrared spectrometer | |
| JP2013213748A (en) | Inner structure inspection device and inner structure monitoring system | |
| CN201615877U (en) | Laser gas detector for coalmines | |
| CN113327399B (en) | Composite smoke and fire image identification detector | |
| CN216871355U (en) | Combined firework image recognition detector | |
| KR20160103667A (en) | a gas leak of mid infrared optical sensor for vehicle mounted | |
| KR100629915B1 (en) | Oil mist density monitor system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |