CN101034030A - Probe built-in type hydrogen gas leakage detector - Google Patents
Probe built-in type hydrogen gas leakage detector Download PDFInfo
- Publication number
- CN101034030A CN101034030A CNA2007100136637A CN200710013663A CN101034030A CN 101034030 A CN101034030 A CN 101034030A CN A2007100136637 A CNA2007100136637 A CN A2007100136637A CN 200710013663 A CN200710013663 A CN 200710013663A CN 101034030 A CN101034030 A CN 101034030A
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- probe
- circuit
- gas leakage
- hydrogen gas
- 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.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
This invention relates to a kind of probe built-in type hydrogen leak detector, includes external air suction pipe, minitype aspirator pump, hydrogen agile probe, signal processing circuit and indicating circuit. the character lay: hydrogen agile probe and minitype aspirator pump built in hydrogen leak detector; entry of minitype aspirator pump connect with end of external air suction pipe; hydrogen agile probe put at outlet pipe of minitype aspirator pump; hydrogen agile probe adopt hydrogen agile semiconductor transducer, its signal output end connect with input end of signal processing circuit; Signal processing circuit's output signal is send to indicating circuit to process detecting outcome and setting leak source.
Description
Technical field
The invention belongs to gas Leak Detection field, be specifically related to a kind of probe built-in type hydrogen gas leakage detector that utilizes the hydrogen trace method to detect type inflatable cable or pipeline leakage.
Background technology
Chinese patent ZL01236193.3 discloses a kind of " inflatable cable hydrogen leak detector ", be a kind of device that uses the hydrogen trace method that the inflatable cable is hunted leak, adopt the external hydrogen quick probe, amplifying circuit amplifies and show the density of hydrogen testing result that monitors by indicating circuit after signal transmssion line is directly delivered to by being electric signal with detected hydrogen conversion of signals, and this device has the following disadvantages:
1, sensitivity and the response speed in order to improve detection, hydrogen sensitive semiconductor-sensor in the external hydrogen quick probe has been selected the hydrogen quick palladium bar field effect tube element for use, the chip of the request for utilization field effect transistor of this element exposes in detected gas, to guarantee contacting of detected gas and chip, be in "on" position during this gas-sensing probe work simultaneously, the chip operation temperature is higher, so the chip in the actual working state can not be met water.But the inflatable cable is laid in underground pipeline more at present, and the environment that pipeline leakage need detect has underground ponding or the higher mud of water cut more, and therefore, the range of application of this external hydrogen quick probe is restricted.
2, the form of external hydrogen quick probe mainly contains hand hold transducer, ground probe, aerial probe, pipeline probe etc., when actual working state, because flowing naturally of air, hydrogen very easily spreads, especially when wind is arranged, the hydrogen rising is easy to blow away behind the ground, is unfavorable for quick, the accurate location of leak source, causes the decline of the sensitivity of detection.
3, there is not continuous data to store and any digitized processing means, only utilize signal amplitude as criterion, by warning reminding testing staff variable concentrations hydrogen content, just rely on the warning volume change to be difficult to differentiate in the use and determine to answer moving direction, necessary constantly relatively current location and the received signal power in position just now, set or strong and weak variation of diverse location signal is difficult to judge for different sensitivity, can not visual indication leak source locality and accurately locate.
Summary of the invention
The purpose of this invention is to provide a kind of be applicable to test hydrogen, windproof, waterproof, highly sensitive, the probe built-in type hydrogen gas leakage detector that can accurately locate and indicate leak source.
Technical scheme of the present invention is: a kind of probe built-in type hydrogen gas leakage detector is provided, comprise external air suction pipe, miniature asepwirator pump, hydrogen quick probe, signal processing circuit and indicating circuit, it is characterized in that: hydrogen quick probe and miniature asepwirator pump are built in the hydrogen gas leakage detector, the inlet of described miniature asepwirator pump is connected with the endcapped of external air suction pipe, hydrogen quick probe places the export pipeline of miniature asepwirator pump, described hydrogen quick probe adopts hydrogen sensitive semiconductor-sensor, its signal output part is connected with the input end of signal processing circuit, and the output signal of signal processing circuit is delivered to indicating circuit and carried out testing result and the indication of leak source location.
The air capacity of described miniature asepwirator pump is preferably 0.5-1.0L/min.
Described external air suction pipe is combined by a scalable spiral pipe and a straight tube.
Described external air suction pipe is combined by a scalable spiral pipe and a flexible tubing that can coil.
Described external air suction pipe is that sealed plugging is connected or the matching thread formula connects with the connected mode of miniature asepwirator pump.
The inhalation port of described external air suction pipe is provided with a waterproof filter.
Described waterproof filter is a micropore ceramics filter bowl.
Described hydrogen sensitive semiconductor-sensor adopts hydrogen quick palladium bar field effect tube; Described signal processing circuit is by driving amplifying circuit and remembering analysis circuit and form.
Described driving amplifying circuit is made up of two constant current sources, a proportional integral circuit, a zeroing circuit and an adjustable gain circuit, described memory analytic unit is made up of the microprocessor or the single-chip microcomputer of band A/D conversion and storer, and described indicating circuit is LCD LCD, LED light emitting diode, loudspeaker or earphone.
Compared with prior art, advantage of the present invention is:
1, the present invention adopts built-in hydrogen sensitive semiconductor-sensor to do hydrogen quick probe, the air that will detect in the object space by external air suction pipe and built-in miniature asepwirator pump sucks by force, realization prevents tested gas loss and hydrogen content is wherein analyzed, has wind-shielding function, guaranteed the sensitivity that detects, have detection sensitivity height, selectivity is good, response speed is fast, the leakage position bearing accuracy is high advantage, wind and variable direction weather effect are more obvious having, and can satisfy round-the-clock leak detection operation.
2, the present invention utilizes built-in hydrogen quick probe to detect by the air that external air suction pipe sucks in the detection object space by force, the inhalation port of external air suction pipe is provided with waterproof filter, has water-proof function, avoided contacting of hydrogen quick palladium bar field effect tube element and water, solved under the situation that certain depth ponding is arranged, problem to the inflatable cable that adopts pipeline laying is hunted leak has improved the reliability and the adaptability of this device work.
3, utilize the advantage of digital signal processing, by detected hydrogen signal is remembered continuously, contrasts, is judged, can be directly, clearly indicate hydrogen quick probe by indicator in real time and depart from still near the trend of leakage point and answer moving direction, finally approach and arrive leakage point center (being that maximum concentration hydrogen is concentrated the place), the reliability and the intuitive of testing result indication have been improved, thereby improved leak detection efficient, reduced the leak detection working strength, reduced experience requirement the leakage detection apparatus user.
4, built-in hydrogen quick probe of the present invention and miniature asepwirator pump, signal processing is used digital integrated circuit in a large number, and machine volume is little, indicates detecting operation directly perceived, mobile convenient.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural principle block diagram of the present invention.
Fig. 2 is the structural principle block diagram that the present invention drives amplifying circuit.
Fig. 3 is the wiring diagram that the present invention drives amplifying circuit embodiment.
Fig. 4 is a principle of work synoptic diagram of the present invention.
1 is probe built-in type hydrogen gas leakage detector among the figure, 2 is external air suction pipe, 3 is miniature asepwirator pump, 4 is hydrogen quick probe, 5 is signal processing circuit, and 6 is indicating circuit, and 7 for driving amplifying circuit, 8 for remembering analysis circuit, 9 is hydrogen tracer gas injection device, and 10 is inflatable cable to be measured or underground utilities.
Embodiment
Among Fig. 1, probe built-in type hydrogen gas leakage detector 1 of the present invention comprises external air suction pipe 2, miniature asepwirator pump 3, hydrogen quick probe 4, signal processing circuit 5 and indicating circuit 6, wherein miniature asepwirator pump 3 and hydrogen quick probe 4 are built in the hydrogen gas leakage detector, the inlet of miniature asepwirator pump 3 is connected with the endcapped of external air suction pipe 2, the hydrogen quick probe 4 of hydrogen test section places the export pipeline of miniature asepwirator pump 3, sucking sample gas discharges along current path from the hydrogen gas leakage detector body with the state of supercharging through miniature asepwirator pump 3 and hydrogen quick probe 4 backs, hydrogen quick probe 4 adopts hydrogen sensitive semiconductor-sensor, its signal output part is connected with the input end of signal processing circuit 5, and the output signal of signal processing circuit 5 is delivered to indicating circuit 6 and carried out testing result and the indication of leak source location.
It is that scalable, crooked spiral pipe or other rubber hose of spiral surrounding form is connected with miniature asepwirator pump 3 that external air suction pipe 2 can adopt when state of nature, its connected mode is that sealed plugging connects or the matching thread formula connects, external air suction pipe 2 connects a detection straight tube according to detecting operating mode needs recombinant on scalable spiral pipe basis, to adapt to hunting leak as hand-held under the multiple situation; For excavating, the buried horizontal pipe that hettocyrtosis is arranged, long range sensing in the small-bore irrigation canals and ditches, a flexible tubing that can coil again then can be connected, utilize it to have certain degree of hardness, vertically flexible and lateral stiffness, wear-resisting, the characteristics of waterproof, need not to add under the condition of support fixation, extend into destination to be measured, having under the situation of certain depth of accumulated water for solving simultaneously, the problem that the inflatable cable that adopts pipeline laying is hunted leak, prevent from water is sucked external air suction pipe, at the inhalation port of external air suction pipe 2 waterproof filter is installed, the filter bowl that waterproof filter employing prior art such as micropore ceramics material are made etc., because due to the material characteristic of micropore ceramics material itself, determined gas that it is had penetrability preferably, because the hydrogen molecule amount is little, penetration power is strong, penetrability to micropore ceramics is better, and the molecular weight of water wants big than hydrogen, difficulty is passed the filter bowl that micropore ceramics is made comparatively speaking, thereby both reached the purpose of must waterproof ventilating again, a metal filtration cover also can be installed in the outside of micropore ceramics filter bowl, is convenient for changing and water-fast flushing.
Built-in type miniature asepwirator pump 3 of the present invention can be selected commercial gas sampling pump or minipump for use, considers the end resistance of bleeding that the length of external air suction pipe causes, and the air capacity of miniature asepwirator pump 3 can be selected 0.2-3L/min, is preferably 0.5-1.0L/min.
Drive that amplifying circuit 7 drives hydrogen quick probes 4 work and be electric signal, deliver to memory analysis circuit 8 after the amplification, in microprocessor or single-chip microcomputer, carry out becoming digital signal after the A/D conversion and by storage memory continuously with detected leak source hydrogen conversion of signals; When leak source hydrogen signal changes along with the mobile appearance of external air suction pipe suction port is strong and weak, current position signal compares with sampled signal before this all the time in microprocessor or single-chip microcomputer, if signal strengthens gradually, then provide indication forward by indicator 8, when leak source hydrogen signal reaches maximal value and begins to weaken gradually, illustrate that current location crossed leak source, indicator 8 provides indication backward, when returning to the maximal value place once more, indicator 8 provides hollow circular demonstration and remembers this signal intensity; After this switch to along this move left and right, and be benchmark with this maximum signal, new position signalling all the time by comparison, strengthen or weaken indicator 8 gradually according to the leak source signal and provide the left/right signal respectively, such as moving right earlier, if signal continues to strengthen, then provide continuation i.e. indication to the right forward, otherwise then provide the i.e. indication left of reverse direction, so continue the maximal value in confirming institute's memory signal, confirm that then this maximum of points is that maximum concentration hydrogen is concentrated the place, satisfy Rule of judgment and provide the fixed point solid circles indication of leakage center that demonstration density of hydrogen maximal value is also sent the leak source location sound and reported to the police by indicator 8.
The model of memory analysis circuit 8 used single-chip microcomputers can be selected C8051F020 or the identical or close microprocessor of function with it for use, and the input signal wiring of microprocessor or single-chip microcomputer gets final product with reference to described model element pin operation instruction; In microprocessor, only need to set the logic determines condition promptly: when beginning to adopt leak source hydrogen signal and currency greater than a last sampled signal values, and select along the pipeline direction, then export the forward arrow signal, otherwise export the reverse arrow signal, and remember for the maximal value on this direction; Select vertical pipeline direction then, from beginning move left and right along the maximum point on the pipeline direction, it is the same to set the logic determines condition, export a left side/right arrow signal respectively, when getting back to the maximum point place once more, and this signal intensity is more consistent with institute memory signal maximal value, judge that then this point leaks the density of hydrogen maximum, very little according to hydrogen transverse dispersion in the effusion surface process, substantially circular in the ground surface distribution range, the characteristics of centre concentration maximum, be easy to judge that this concentration maximum point (must move towards to locate consistent with pipeline) is accurate leakage point, show the solid circles indication of leakage center thereby send the command signal actuation indicator, show the density of hydrogen maximal value or provide leak source center audible alarm, position by the staff and continue to detect behind the mark or repeated authentication once more.
The device power supply can adopt the high capacity rechargeable battery and keep outer power supply source interface.
Among Fig. 2, hydrogen quick probe 4 adopts hydrogen quick palladium bar field effect tube Pd-MOSFET, it drives amplifying circuit 7 and is made up of two constant current sources, proportional integral circuit, amplifying circuit and power supply, connected mode is that the port one of hydrogen quick palladium bar field effect tube is connected with an input end of a constant current source and amplifying circuit, port 4 is connected with an input end of another constant current source and proportional integral circuit, the output of proportional integral circuit is connected with the port of hydrogen quick palladium bar field effect tube 2, and the port 3 of hydrogen quick palladium bar field effect tube directly is connected with power supply.Power supply is a circuit supply, and the output terminal output leak source hydrogen simulating signal of amplifying circuit is to memory analysis circuit 8.
The purpose that constant current source is set is for hydrogen quick palladium bar field effect tube provides a stable working current, improves its job stability; The proportional integral circuit can adjust and make hydrogen quick palladium bar field effect tube to be operated in suitable, the stable operating temperature range.
Among Fig. 3, constant-current source circuit is made of voltage stabilizing diode Z1, Z2, resistance R 1-R6 and triode BG1 and BG2; Resistance R 7, adjustable resistance W1 and voltage stabilizing diode Z3 constitute zeroing circuit; Amplifier IC1, resistance R 8, R9, adjustable resistance W2 constitute the adjustable gain circuit; Adjustable resistance W3 constitutes given circuit; Amplifier IC2, resistance R 10, R11, R12 and C1 composition integrating circuit.Wherein+the 5V power end is connected with the e utmost point with the b utmost point of triode BG1, BG2 through voltage stabilizing diode Z1, Z2 negative pole and resistance R 2, R5 respectively,-5V power end is connected with the b utmost point of triode BG1, BG2 through resistance R 1, R4 respectively, the c utmost point of triode BG1, BG2 is connected with 1,4 ends of hydrogen quick palladium bar field effect tube through resistance R 3, R6 respectively, and 3 ends of hydrogen quick palladium bar field effect tube are connected with-5V power end; + 5V power end is connected with 1 end of adjustable resistance W1 and the negative pole of voltage stabilizing diode Z3 through resistance R 7,2 ends of adjustable resistance W1 and the positive pole of voltage stabilizing diode Z3 are connected with-5V power end, its 3 end is connected with the input anode of amplifier IC1 through resistance R 8, another input end of amplifier IC1 and 1 end of adjustable resistance W2, adjustable end 3 ends join and are connected with 1 end of hydrogen quick palladium bar field effect tube through resistance R 9,2 ends of adjustable resistance W2 are connected with the output terminal of amplifier IC1, + 5V power end is connected with 1 end of adjustable resistance W3, and-5V power end is connected with 2 ends of adjustable resistance W3; The input negative terminal of amplifier IC2 joins through 3 ends of resistance R 11 with adjustable resistance W3, and is connected with 4 ends of hydrogen quick palladium bar field effect tube through resistance R 12, also is connected with the output terminal of amplifier IC2 through capacitor C 1 negative terminal, resistance R 10 simultaneously; Another of amplifier IC2 imported positive termination power ground; The output terminal of amplifier IC2 also is connected with 2 ends of hydrogen quick palladium bar field effect tube.
Operational amplifier IC1, IC2 can select LM324, LM741 or the identical or close integrated circuit of function with it for use, and power supply can adopt the quickly-chargeable high-capacity lithium battery.
Zeroing circuit is set can make the present invention adapt to fluctuation of different hydrogen quick probes, line impedance and supply voltage etc. with adjustable gain amplifier circuit.
Among Fig. 4, during to inflatable cable or buried pipeline 10 leak detections, be the tracer gas of 5% hydrogen and 95% nitrogen to the composition that underground utilities to be measured inject certain pressure by hydrogen tracer gas injection device 9; When leak source hydrogen signal escapes into ground, carrying hydrogen gas leakage detector 8 detects along inflatable cable to be measured or the mobile search of ground, underground utilities 10 top, flow through after its built-in miniature asepwirator pump sucks leak source hydrogen by external air suction pipe and discharge behind the built-in hydrogen quick probe, built-in hydrogen quick probe is an electric signal with detected hydrogen conversion of signals, signal processing circuit in hydrogen gas leakage detector 8 is amplified, after storage and the analyzing and processing, power according to measured hydrogen signal changes, and hydrogen test leak provides the front, rear, left and right indication by indicating circuit; When the arriving signal maximum of points, show that density of hydrogen detects maximal value and provides the warning of leak source location sound.
The present invention uses digital integrated circuit in a large number, make full use of the advantage of digital signal processing, by detected leak source hydrogen signal is remembered continuously, contrast, judge, can be directly, clearly indicating hydrogen quick probe by indicating circuit in real time departs from still near the trend of leakage point and answers moving direction, finally approach and arrive leakage point center (being that maximum concentration hydrogen is concentrated the place), the reliability and the intuitive of testing result indication have been improved, thereby improved leak detection efficient, reduced the leak detection working strength, reduced experience requirement the leakage detection apparatus user.
Probe built-in type hydrogen gas leakage detector of the present invention can be made cart type or portable.Because a large amount of integrated circuit that use, working stability is reliable, and machine volume is little, and mobile detecting operation is convenient, can be widely used in the hydrogen trace method leak detection of inflatable cable or buried pipeline.
Claims (9)
1, probe built-in type hydrogen gas leakage detector, comprise external air suction pipe, miniature asepwirator pump, hydrogen quick probe, signal processing circuit and indicating circuit, it is characterized in that: hydrogen quick probe and miniature asepwirator pump are built in the hydrogen gas leakage detector, the inlet of described miniature asepwirator pump is connected with the endcapped of external air suction pipe, hydrogen quick probe places the export pipeline of miniature asepwirator pump, described hydrogen quick probe adopts hydrogen sensitive semiconductor-sensor, its signal output part is connected with the input end of signal processing circuit, and the output signal of signal processing circuit is delivered to indicating circuit and carried out testing result and the indication of leak source location.
2, according to the described probe built-in type hydrogen gas leakage detector of claim 1, it is characterized in that: the air capacity of described miniature asepwirator pump is preferably 0.5-1.0L/min.
3, according to the described probe built-in type hydrogen gas leakage detector of claim 1, it is characterized in that: described external air suction pipe is combined by a scalable spiral pipe and a straight tube.
4, according to the described probe built-in type hydrogen gas leakage detector of claim 1, it is characterized in that: described external air suction pipe is combined by a scalable spiral pipe and a flexible tubing that can coil.
5, according to the described probe built-in type hydrogen gas leakage detector of claim 1, it is characterized in that: described external air suction pipe is that sealed plugging is connected or the matching thread formula connects with the connected mode of miniature asepwirator pump.
6, according to the described probe built-in type hydrogen gas leakage detector of claim 1, it is characterized in that: the inhalation port of described external air suction pipe is provided with a waterproof filter.
7, according to the described probe built-in type hydrogen gas leakage detector of claim 6, it is characterized in that: described waterproof filter is a micropore ceramics filter bowl.
8, according to claim 1,2,3,4,5,6 or 7 described probe built-in type hydrogen gas leakage detectors, it is characterized in that: described hydrogen sensitive semiconductor-sensor adopts hydrogen quick palladium bar field effect tube; Described signal processing circuit is by driving amplifying circuit and remembering analysis circuit and form.
9, according to the described probe built-in type hydrogen gas leakage detector of claim 8, it is characterized in that: described driving amplifying circuit is made up of two constant current sources, a proportional integral circuit, a zeroing circuit and an adjustable gain circuit, described memory analytic unit is made up of the microprocessor or the single-chip microcomputer of band A/D conversion and storer, and described indicating circuit is LCD LCD, LED light emitting diode, loudspeaker or earphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100136637A CN101034030A (en) | 2007-03-04 | 2007-03-04 | Probe built-in type hydrogen gas leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100136637A CN101034030A (en) | 2007-03-04 | 2007-03-04 | Probe built-in type hydrogen gas leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101034030A true CN101034030A (en) | 2007-09-12 |
Family
ID=38730683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100136637A Pending CN101034030A (en) | 2007-03-04 | 2007-03-04 | Probe built-in type hydrogen gas leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101034030A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454050A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Fast leakage-detecting device of nitrogen hydrogen leakage detector |
| CN105556271A (en) * | 2013-08-29 | 2016-05-04 | 英福康有限责任公司 | Self-cleaning particle filter in a sniffer probe |
| CN108204881A (en) * | 2018-04-03 | 2018-06-26 | 苏州瑞驱电动科技有限公司 | A kind of motor compressor air-tightness non-destructive testing device and its detection method |
| CN108387343A (en) * | 2018-03-01 | 2018-08-10 | 英特尔产品（成都）有限公司 | Baking oven air leakage point quickly detects positioning device and method |
| CN111442880A (en) * | 2020-04-26 | 2020-07-24 | 北京北方华创微电子装备有限公司 | Detection system and detection method for semiconductor equipment |
| CN115507307A (en) * | 2022-09-12 | 2022-12-23 | 西南石油大学 | Hydrogen leakage monitoring and response system of hydrogen mixing system |
-
2007
- 2007-03-04 CN CNA2007100136637A patent/CN101034030A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556271A (en) * | 2013-08-29 | 2016-05-04 | 英福康有限责任公司 | Self-cleaning particle filter in a sniffer probe |
| CN103454050A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Fast leakage-detecting device of nitrogen hydrogen leakage detector |
| CN108387343A (en) * | 2018-03-01 | 2018-08-10 | 英特尔产品（成都）有限公司 | Baking oven air leakage point quickly detects positioning device and method |
| CN108387343B (en) * | 2018-03-01 | 2019-11-05 | 英特尔产品（成都）有限公司 | Baking oven air leakage point quickly detects positioning device and method |
| CN108204881A (en) * | 2018-04-03 | 2018-06-26 | 苏州瑞驱电动科技有限公司 | A kind of motor compressor air-tightness non-destructive testing device and its detection method |
| CN111442880A (en) * | 2020-04-26 | 2020-07-24 | 北京北方华创微电子装备有限公司 | Detection system and detection method for semiconductor equipment |
| CN115507307A (en) * | 2022-09-12 | 2022-12-23 | 西南石油大学 | Hydrogen leakage monitoring and response system of hydrogen mixing system |
| CN115507307B (en) * | 2022-09-12 | 2024-05-14 | 西南石油大学 | Hydrogen leakage monitoring and responding system of hydrogen mixing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101034030A (en) | Probe built-in type hydrogen gas leakage detector | |
| CN1936413A (en) | Underground pipeline leak-detection method and apparatus | |
| CN204594924U (en) | A kind of Water quality detected instrument | |
| CN201378163Y (en) | Instrument for measuring solute transport diffusibity parameters | |
| CN110195824A (en) | A kind of network-based underground pipeline water leakage detection method and leakage water tester | |
| CN100588931C (en) | Leak detector | |
| CN202613055U (en) | Pipeline blockage position detector | |
| CN201021756Y (en) | Built-in probe hydrogen leakage instrument | |
| CN108614083B (en) | Gas analyzer and method for detecting pungent odor components of rubber asphalt | |
| CN104564013A (en) | Device for automatically identifying and protecting position of power head of horizontal positioning drill | |
| CN207649974U (en) | A kind of gas quick sampling detection device | |
| CN108168954A (en) | A kind of grain sampler with detection device | |
| CN201653847U (en) | Oxygen permeability tester for cornea repair material | |
| CN211621892U (en) | Leakage detection and leakage stoppage integrated device | |
| CN205138836U (en) | Automatic suction filter of soil solution with function fetches earth | |
| CN207067120U (en) | Support soil CH_4 uptake analyzer of the multiple caliber different depth with GPS | |
| CN117347111B (en) | Carbon dioxide geological sequestration monitoring device | |
| CN206420560U (en) | A kind of hand-transmitted vibration analyzer | |
| CN207004780U (en) | Extraction flow control system based on double absolute pressure methods in side stream type gasmetry | |
| CN207007779U (en) | A kind of ultrasonic wave early warning defectoscope with positioning function | |
| CN207248297U (en) | A kind of water level detection gauge | |
| CN205941432U (en) | Medical CO2 determination appearance | |
| CN206594133U (en) | Based on early warning of the gas analyzer under micro- positive/negative-pressure occasion and protection device | |
| CN205826467U (en) | A kind of portable dam base drainage well detection system of particles | |
| CN207081575U (en) | Natural subsidence and Duplicate Samples harvester used in lake and water quality of river monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070912 |