CN109238121A - A kind of underwater kit ohject displacement data detection system and its method - Google Patents
A kind of underwater kit ohject displacement data detection system and its method Download PDFInfo
- Publication number
- CN109238121A CN109238121A CN201811332271.1A CN201811332271A CN109238121A CN 109238121 A CN109238121 A CN 109238121A CN 201811332271 A CN201811332271 A CN 201811332271A CN 109238121 A CN109238121 A CN 109238121A
- Authority
- CN
- China
- Prior art keywords
- module
- voltage signal
- underwater kit
- ohject
- displacement sensor
- 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
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 88
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000011896 sensitive detection Methods 0.000 claims abstract description 23
- 238000007405 data analysis Methods 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The present invention discloses a kind of underwater kit ohject displacement data detection system and its method, which includes: autocoupling type displacement sensor;Amplifier module is connect with autocoupling type displacement sensor, is received and is amplified voltage signal measured by autocoupling type displacement sensor;Phase sensitive detection module, connect with amplifier module, receives and identify the voltage signal that modulated amplifier module is amplified;Comparator module is connect with phase sensitive detection module, is received and is compared the voltage signal of the identified modulation of phase sensitive detection module and the size of input end signal;Data analysis module is connect with comparator module, and the voltage signal after receiving and analyzing processing comparator module relatively obtains equipment object mobile data signal, and be sent to ocean control platform.The present invention can constantly detect the movement of the object of underwater kit, and user can take measures to take ohject displacement analysis, judgement to avoid risk, reduces the damage to fixed equipment to control platform for the data feedback that will test.
Description
Technical field
The present invention relates to underwater kit monitor field, in particular to a kind of underwater kit ohject displacement data detection system and
Its method.
Background technique
The development of human society be unable to do without the development and utilization to various resources.In today that land resources are petered out,
Sight has been invested deep-sea ocean by people.Sea floor world is in addition to everybody the manganese nodule that what's frequently heard can be repeated in detail, deep-sea oil gas, and there are also hydrothermal solution mines
Bed, and current most very powerful and exceedingly arrogant gas hydrates.The reserves that object is closed in natural gas hydration are extremely huge.It is estimated that people
It is that class has been used up and exploitation petroleum, coal, natural gas are added together not yet, it is total to be also unable to catch up with organic carbon in gas hydrates
The half of content.If this estimation is pretty good, that is undoubtedly the Gospel of the mankind, it is thus possible to the new energy of new century will be become,
It is particularly important with the developmental research of undersea device.
Undersea device is influenced by marine environment (pressure, ocean current etc.), it may occur that corrosion, damage, ohject displacement etc. are such as extra large
The skidding of bottom production tree, the inclination of well head, displacement of oil pipeline etc..Once ohject displacement occurs for undersea device, to environment
It influences and the influence of society is all very big.Therefore it is particularly important for the data Detection Techniques of underwater equipment ohject displacement.
Current sea-bottom oil-gas both at home and abroad produces this and belongs to blank to technology, and in order to ensure the safety of underwater equipment, user compels
It cuts and wishes to develop one kind for underwater kit ohject displacement data detection system.
Summary of the invention
The object of the present invention is to provide a kind of underwater kit ohject displacement data detection system and its methods, for practical work
Due to being influenced by external environment (such as ocean current, pressure, water temperature etc.), object shifting can constantly occur underwater equipment for underwater equipment in condition
It is dynamic, and then the normal operation of equipment is influenced, system of the invention can constantly detect ohject displacement, and can be made data feedback
User, to reduce the damage of the ohject displacement that monitors to fixed equipment, to reduce the waste and economy of resource
Loss.
In order to achieve the above object, the invention discloses a kind of underwater kit ohject displacement data detection system, include:
It is changed using the relative displacement between object so that output end voltage and input terminal voltage signal generate the self coupling of difference
Formula displacement sensor;
The amplifier module for recording input terminal voltage signal connect with the autocoupling type displacement sensor, receives and amplify
The voltage signal that the autocoupling type displacement sensor is exported;
Phase sensitive detection module is connect with the amplifier module, receives and identify the voltage that modulated amplifier module is amplified
Signal;
Comparator module is connect with the phase sensitive detection module, receives the voltage of the identified modulation of phase sensitive detection module
Signal, and the modulated voltage signal of the identification is compared with the input terminal voltage signal, obtain electricity between the two
Press signal difference and as comparative result;
Data analysis module is connect with the comparator module, is received the comparison result that comparator module compares transmission, will be compared
The voltage signal of relatively result is converted into displacement signal, obtains equipment object mobile data signal.
Preferably, the autocoupling type displacement sensor includes:
As the output end of output voltage signal part, it is connect with the input terminal of the amplifier module;
For the input terminal that input electric supply system passes through, it is mounted on underwater kit.
Preferably, the output voltage signal part of the autocoupling type displacement sensor be fixedly mounted on it is with underwater kit and
It arranges on parallel pedestal.
Preferably, the underwater kit ohject displacement data detection system is supplied by the input power power supply system
Electricity, the input power power supply system are 220V alternating current.
Preferably, the equipment object mobile data signal is sent to ocean control platform by the data analysis module
Central control module.
Preferably, the output voltage signal part of the autocoupling type displacement sensor, the amplifier module, the phase sensitivity
Detection module, the comparator module and the data analysis module are installed in a waterproof case.
The present invention also provides a kind of using the underwater of underwater kit ohject displacement data detection system as described above
Ohject displacement data detection method is equipped, which includes following procedure:
Install and fix autocoupling type displacement sensor;
The autocoupling type displacement sensor is changed using the relative displacement between object so that output end voltage input terminal voltage
Signal generates difference, measures corresponding voltage signal;
The voltage signal that the autocoupling type displacement sensor measures is amplified by amplifier module;
The amplified voltage signal of the amplifier module is passed into phase sensitive detection module and carries out identification modulation;
The phase sensitive detection module is identified into modulated voltage signal and passes to comparator module, and with input terminal voltage signal
It is compared;
By the comparator module relatively after voltage signal send data analysis module to and be analyzed and processed, obtain corresponding
Equipment object mobile data signal;
The equipment object mobile data signal is sent to the central control module of platform, is realized to underwater equipment ohject displacement
The detection of data.
Preferably, the autocoupling type displacement sensor includes:
As the output end of output voltage signal part, it is connect with the input terminal of the amplifier module;
For the input terminal that input electric supply system passes through, it is mounted on underwater kit.
Preferably, the output voltage signal part of the autocoupling type displacement sensor be fixedly mounted on it is with underwater kit and
It arranges on parallel pedestal.
Preferably, the underwater kit ohject displacement data detection system is supplied by the input power power supply system
Electricity, the input power power supply system are 220V alternating current.
Compared with prior art, the invention has the benefit that the present invention can object movement to underwater equipment can when
When the data feedback that detects, and can will test to control platform, user can take measures to take ohject displacement
Analysis judges to avoid risk, so that damage of the ohject displacement monitored to fixed equipment is reduced, to reduce resource
Waste and the loss of economy, this will generate very big economic impact and social influence to client.
Detailed description of the invention
Underwater kit ohject displacement data Fig. 1 of the invention detect schematic diagram.
Specific embodiment
The invention discloses a kind of underwater kit ohject displacement data detection system and its methods, in order to make the present invention more
It becomes apparent, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, underwater kit (also referred to as underwater equipment) ohject displacement data detection system of the invention includes self coupling
Formula displacement sensor, amplifier module, phase sensitive detection module, comparator module and data analysis module.
For the present invention using the autocoupling type displacement sensor of highly sensitive and anti-disorder, autocoupling type displacement sensor includes two groups of lines
(one group of coil is located at output end as output voltage signal part to circle;Another group of coil, which is used as, is mounted on underwater equipment part,
Positioned at input terminal), principle is exactly that the relative displacement between the object is changed, then the voltage of output end is reduced, and initial
Difference can be generated between input end signal, the size of the difference is to characterize the size of the displacement of generation.
Whole system of the invention is to provide electric power by 220V alternating current for whole system, by autocoupling type displacement sensor
One end (being mounted on one end of underwater equipment part).
Autocoupling type displacement sensor be fixedly mounted on (such as seabed horizon d) on the pedestal of the side by side parallel of underwater equipment,
Wherein, a part (such as output voltage signal part) of autocoupling type displacement sensor is used as fixed part, the i.e. fixed part
It is fixedly mounted on the base, because what is measured is the movement of underwater equipment, if autocoupling type displacement sensor and underwater equipment move
It is dynamic, then it can not measure.
The output voltage signal part of autocoupling type displacement sensor and the input terminal of amplifier module connect, amplifier module
Output end is connect with phase sensitive detection module input.The voltage signal that amplifier module can measure autocoupling type displacement sensor
It amplifies, is convenient for the detection work of subsequent phase sensitive detection module in this way.Phase sensitive detection module includes to have to identify modulation voltage
The amplified voltage signal that amplifier module is sent can be carried out identification tune by the detecting circuit of signal phase and frequency-selecting ability
The operation such as system.
The output end of phase sensitive detection module is connect with comparator module input terminal.Comparator module receives phase sensitive detection module
The modulated voltage signal of the identification of transmission, and compare big between the modulated voltage signal of the identification and input end signal
It is small, the difference of voltage signal between the two is obtained, comparison result is exported;Wherein the input end signal is previously recorded in comparator mould
In block.
The output end of comparator module and the input terminal of data analysis module connect.Data analysis module receives comparator mould
The comparison result that block is sent is analyzed and is handled, and the voltage signal of the comparison result is converted into corresponding displacement signal, is obtained
To equipment object mobile data signal, and equipment object mobile data signal is sent to the central control module of platform, realized
Detection to underwater equipment ohject displacement data.
The output voltage signal part of autocoupling type displacement sensor of the invention, amplifier module, phase sensitive detection module, ratio
It is installed in waterproof case compared with device module and data analysis module, to guarantee to work normally under water.Autocoupling type displacement sensing
The underwater equipment part that is mounted on of device is not arranged in waterproof case.
It is specific as follows the present invention also provides a kind of underwater kit ohject displacement data detection method:
Autocoupling type displacement sensor be fixedly mounted on (such as seabed horizon d) on the pedestal of the side by side parallel of underwater equipment, and will
The voltage signal measured passes to phase sensitive detection module by amplifier module, and phase sensitive detection module will identify modulated voltage
Signal passes to comparator module, and then comparator module will identify modulated voltage signal and input end signal carries out size
Compare, and sends the voltage signal after comparison to data analysis module, the equipment that data analysis module again handles analysis well
Object mobile data signal is sent to the central control module of platform (such as ocean control platform), to realize to underwater equipment object
The detection of body displacement data.
In conclusion the present invention is set using the autocoupling type displacement sensor of highly sensitive and anti-disorder by installation under water
The data processing module of standby the inside, by treated, data are sent to ocean control platform, to realize to underwater equipment object position
The detection for moving data, to guarantee the normal operation of underwater equipment.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of underwater kit ohject displacement data detection system, characterized by comprising:
It is changed using the relative displacement between object so that output end voltage and input terminal voltage signal generate the self coupling of difference
Formula displacement sensor;
The amplifier module for recording input terminal voltage signal connect with the autocoupling type displacement sensor, receives and amplify
The voltage signal that the autocoupling type displacement sensor is exported;
Phase sensitive detection module is connect with the amplifier module, receives and identify the voltage that modulated amplifier module is amplified
Signal;
Comparator module is connect with the phase sensitive detection module, receives the voltage of the identified modulation of phase sensitive detection module
Signal, and the modulated voltage signal of the identification is compared with the input terminal voltage signal, obtain electricity between the two
Press signal difference and as comparative result;
Data analysis module is connect with the comparator module, is received the comparison result that comparator module compares transmission, will be compared
The voltage signal of relatively result is converted into displacement signal, obtains equipment object mobile data signal.
2. underwater kit ohject displacement data detection system as described in claim 1, which is characterized in that
The autocoupling type displacement sensor includes:
As the output end of output voltage signal part, it is connect with the input terminal of the amplifier module;
For the input terminal that input electric supply system passes through, it is mounted on underwater kit.
3. underwater kit ohject displacement data detection system as claimed in claim 2, which is characterized in that
The output voltage signal part of the autocoupling type displacement sensor is fixedly mounted on the base with the side by side parallel of underwater kit
On seat.
4. underwater kit ohject displacement data detection system as claimed in claim 2, which is characterized in that
The underwater kit ohject displacement data detection system is powered by the input power power supply system, the input
Electric supply system is 220V alternating current.
5. underwater kit ohject displacement data detection system as described in claim 1, which is characterized in that
The equipment object mobile data signal is sent to the center control mould of ocean control platform by the data analysis module
Block.
6. underwater kit ohject displacement data detection system as claimed in claim 2 or claim 3, which is characterized in that
The output voltage signal part of the autocoupling type displacement sensor, the amplifier module, the phase sensitive detection module, institute
It states comparator module and the data analysis module is installed in a waterproof case.
7. a kind of underwater dress using underwater kit ohject displacement data detection system as claimed in any one of claims 1 to 6
Standby ohject displacement data detection method, which is characterized in that the detection method includes following procedure:
Install and fix autocoupling type displacement sensor;
The autocoupling type displacement sensor is changed using the relative displacement between object so that output end voltage input terminal voltage
Signal generates difference, measures corresponding voltage signal;
The voltage signal that the autocoupling type displacement sensor measures is amplified by amplifier module;
The amplified voltage signal of the amplifier module is passed into phase sensitive detection module and carries out identification modulation;
The phase sensitive detection module is identified into modulated voltage signal and passes to comparator module, and with input terminal voltage signal
It is compared;
By the comparator module relatively after voltage signal send data analysis module to and be analyzed and processed, obtain corresponding
Equipment object mobile data signal;
The equipment object mobile data signal is sent to the central control module of platform, is realized to underwater equipment ohject displacement
The detection of data.
8. underwater kit ohject displacement data detection method as claimed in claim 7, which is characterized in that
The autocoupling type displacement sensor includes:
As the output end of output voltage signal part, it is connect with the input terminal of the amplifier module;
For the input terminal that input electric supply system passes through, it is mounted on underwater kit.
9. underwater kit ohject displacement data detection method as claimed in claim 8, which is characterized in that
The output voltage signal part of the autocoupling type displacement sensor is fixedly mounted on the base with the side by side parallel of underwater kit
On seat.
10. underwater kit ohject displacement data detection method as claimed in claim 8 or 9, which is characterized in that
The underwater kit ohject displacement data detection system is powered by the input power power supply system, the input
Electric supply system is 220V alternating current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811332271.1A CN109238121A (en) | 2018-11-09 | 2018-11-09 | A kind of underwater kit ohject displacement data detection system and its method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811332271.1A CN109238121A (en) | 2018-11-09 | 2018-11-09 | A kind of underwater kit ohject displacement data detection system and its method |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109238121A true CN109238121A (en) | 2019-01-18 |
Family
ID=65077792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811332271.1A Pending CN109238121A (en) | 2018-11-09 | 2018-11-09 | A kind of underwater kit ohject displacement data detection system and its method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109238121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110030915A (en) * | 2019-03-21 | 2019-07-19 | 杰克缝纫机股份有限公司 | Differential amount detecting device and method |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1605137A1 (en) * | 1988-05-11 | 1990-11-07 | Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела | Differential transformer transducer of linear displacements |
CN102589410A (en) * | 2012-03-15 | 2012-07-18 | 李建国 | Phase sensitive detection type linear variable differential transformer (LVDT) displacement sensor for measuring pile foundation micro strain |
CN104266575A (en) * | 2014-10-08 | 2015-01-07 | 北京曙光航空电气有限责任公司 | Coil structure of LVDT |
CN105890506A (en) * | 2016-05-26 | 2016-08-24 | 广小芳 | Steel strip alignment detection system applied to industrial production |
CN105960508A (en) * | 2013-09-30 | 2016-09-21 | 哈里伯顿能源服务公司 | Downhole gradiometric ranging for t-intersection and well avoidance utilizing transmitters & receivers having magnetic dipoles |
US20170031050A1 (en) * | 2015-07-29 | 2017-02-02 | Texas Instruments Incorporated | Distance determination based on reflected admittance |
CN108562216A (en) * | 2018-05-30 | 2018-09-21 | 华中科技大学 | A kind of capacitive displacement sensing device transmitted at a distance based on primary |
-
2018
- 2018-11-09 CN CN201811332271.1A patent/CN109238121A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1605137A1 (en) * | 1988-05-11 | 1990-11-07 | Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела | Differential transformer transducer of linear displacements |
CN102589410A (en) * | 2012-03-15 | 2012-07-18 | 李建国 | Phase sensitive detection type linear variable differential transformer (LVDT) displacement sensor for measuring pile foundation micro strain |
CN105960508A (en) * | 2013-09-30 | 2016-09-21 | 哈里伯顿能源服务公司 | Downhole gradiometric ranging for t-intersection and well avoidance utilizing transmitters & receivers having magnetic dipoles |
CN104266575A (en) * | 2014-10-08 | 2015-01-07 | 北京曙光航空电气有限责任公司 | Coil structure of LVDT |
US20170031050A1 (en) * | 2015-07-29 | 2017-02-02 | Texas Instruments Incorporated | Distance determination based on reflected admittance |
CN105890506A (en) * | 2016-05-26 | 2016-08-24 | 广小芳 | Steel strip alignment detection system applied to industrial production |
CN108562216A (en) * | 2018-05-30 | 2018-09-21 | 华中科技大学 | A kind of capacitive displacement sensing device transmitted at a distance based on primary |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110030915A (en) * | 2019-03-21 | 2019-07-19 | 杰克缝纫机股份有限公司 | Differential amount detecting device and method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102162769A (en) | Fatigue multi-point wireless monitoring system of marine riser | |
CN201292834Y (en) | Riser monitoring system based on underwater sound | |
CN103485761A (en) | Deepwater drilling riser state monitoring system and working method thereof | |
CN105757465B (en) | A kind of valve leakage Wireless Networking real-time detection apparatus | |
CN209101994U (en) | A kind of underwater kit ohject displacement data detection system | |
CN206514881U (en) | Soil and underground water detection device | |
CN101894454B (en) | Oil derrick stress measurement and data acquisition system based on wireless sensor network | |
CN109238121A (en) | A kind of underwater kit ohject displacement data detection system and its method | |
CN102636306A (en) | Distributed strain collector for long-term safety monitoring of ship structure | |
CN103334781A (en) | Monitoring system for potential safety hazard in methane gas exhausting and mining | |
CN107907641A (en) | A kind of automatic device for monitoring and analyzing and application method for mobility underground water | |
CN209102263U (en) | A kind of deep sea hydraulic detection system | |
CN111243213B (en) | Electromagnetic signal detection and positioning method for spontaneous combustion high-temperature abnormal area of coal pile or gangue dump | |
Hu et al. | Hybrid Feature Extraction of Pipeline Microstates Based on Φ‐OTDR Sensing System | |
KR20220137745A (en) | Mooring buoy with data transmission system | |
CN210135949U (en) | Hydrogen cylinder monitoring system | |
US20170018173A1 (en) | Acoustic frequency interrogation and data system | |
CN205103228U (en) | Detection circuitry of dissolved gas concentration signal among transformer oil | |
CN102029611A (en) | Device and method for controlling micro underwater robot | |
CN207408388U (en) | A kind of automatic device for monitoring and analyzing for mobility underground water | |
CN107421588B (en) | Fiber bragg grating sensing mine safety monitoring system with anchor rod as sensing medium | |
CN109653734A (en) | A kind of multi-parameter measurement while drilling information ground receiving system and method | |
CN201493850U (en) | Miniature control device for underwater robot | |
CN209296539U (en) | Underwater kit hydrogen sulfide corrosion data detecting device | |
CN104018883A (en) | On-line/off-line coal bed gas pressure monitoring and analyzing system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |