CN201444070U - Wireless liquid level measuring instrument - Google Patents
Wireless liquid level measuring instrument Download PDFInfo
- Publication number
- CN201444070U CN201444070U CN2009200153317U CN200920015331U CN201444070U CN 201444070 U CN201444070 U CN 201444070U CN 2009200153317 U CN2009200153317 U CN 2009200153317U CN 200920015331 U CN200920015331 U CN 200920015331U CN 201444070 U CN201444070 U CN 201444070U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- wireless
- level sensor
- measuring instrument
- sounding rod
- 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.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 239000012530 fluid Substances 0.000 claims description 25
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000004891 communication Methods 0.000 abstract description 7
- 238000007667 floating Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 235000014676 Phragmites communis Nutrition 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The utility model provides a wireless liquid level measuring instrument, which is characterized by comprising an electronic module, a measuring rod and a floating ball. The measuring rod is arranged on the bottom of the electronic module, the floating ball with a magnetic ring therein is movably arranged on the measuring rod, and a liquid level sensor is arranged in the measuring rod and is connected with the electronic module. The utility model adopts the wireless connection technology, wireless communication technology and power supply technology, is used in the magnetostrictive liquid level sensor and the reed type liquid level sensor with low power consumption, and realizes the multiple-point wireless real-time measurement of the liquid level, interface and temperature and the centralized display and processing through the computer. Compared with the traditional liquid level meter, the utility model has the advantages of facilitating the installation and removal, saving a large amount of site construction, quickening the debugging and maintenance, and operating more securely and reliably with no electrical connection.
Description
Technical field: the utility model relates to a kind of measuring equipment, relates in particular to a kind of wireless fluid level measuring instrument.
Background technology: wired measuring is substantially all adopted in the multimetering in industries such as petrochemical industry, pharmacy, food, boats and ships, water conservancy and commercial measurement at present, and the defective of Cun Zaiing has like this:
1, a large amount of loaded down with trivial details field wirings make on-the-spot installation, use, Breakdown Maintenance etc. cause great inconvenience, and the expense height.
2, the wire transmission meeting of growing distance brings noise, and poor anti jamming capability, influences measuring accuracy.
Summary of the invention:
Goal of the invention: the utility model provides a kind of wireless fluid level measuring instrument, its objective is problem and poor anti jamming capability that the installation that exists in the solution wired measuring equipment in the past, use, Breakdown Maintenance etc. are inconvenient, the problem that measuring accuracy is low.
Technical scheme: the utility model is achieved through the following technical solutions:
A kind of wireless fluid level measuring instrument is characterized in that: described wireless fluid level measuring instrument mainly comprises electronic compartment, sounding rod and ball float, and sounding rod is arranged on the bottom of electronic compartment; The ball float that includes magnet ring is movably arranged on the sounding rod; Be provided with liquid level sensor in described sounding rod, described liquid level sensor is connected with electronic compartment.
Described sounding rod is divided into outer tube and interior pipe, and described liquid level sensor setting on inner pipe.
Described liquid level sensor can be selected magnetostrictive liquid level sensor or dry-reed liquid level sensor.
Also be provided with temperature sensor on the interior pipe of sounding rod, temperature sensor also is connected with electronic compartment.
On sounding rod, also be provided with the spacing alarm device.
Advantageous effect: the utility model provides a kind of wireless fluid level measuring instrument, and described wireless fluid level measuring instrument mainly comprises electronic compartment, sounding rod and ball float, and sounding rod is arranged on the bottom of electronic compartment; The ball float that includes magnet ring is arranged on the sounding rod; Be provided with liquid level sensor in described sounding rod, described liquid level sensor is connected with electronic compartment.Described liquid level sensor can be selected magnetostrictive liquid level sensor or dry-reed liquid level sensor; The electronic compartment power supply adopts the powered battery mode, and measurement data adopts wireless transmission method to send, and installs and adopts explosion-resistant enclosure.Sounding rod is divided into outer tube and interior pipe; The outer tube of sounding rod is made by corrosion resistant stainless-steel seamless pipe, so that protective effect to be provided; Can be in the middle interior pipe according to equipped magnetostrictive liquid level sensor of the difference that measuring accuracy requires or tongue tube liquid level sensor.Also be fitted with temperature sensor in addition, the temperature of the current fluid to be measured of collection that can be real-time.In the sounding rod outside, be with the stainless steel floating ball that includes magnet ring that can move with liquid level.Two ball floats that the sounding rod outside can be furnished with are measured liquid level and interface between the different liquids respectively.
The signal that collects launches through wireless-modulated through after the level conversion and respective handling of electronic compartment, realized the wireless measurement of liquid level, interface, temperature.
The concrete advantage of this utility model is as follows:
1, easy to use
Wireless connections between electronic compartment and the receiving end, wireless communication liquid level instrument makes on-the-spot easy installation and removal, has removed the worry of loaded down with trivial details cable wiring manufacture from, has saved a large amount of man power and materials, by wireless telecommunications, has realized long-distance transmissions.
2, safe
Wireless fluid level measuring instrument is adapted at hazardous areas such as various inflammable, explosive, high temperature, high pressure and uses.The hidden danger of having avoided manual measurement, electrical equipment connecting band, site operation to bring.
3, precision height
Fluid level measuring instrument adopts magnetostriction principle, the liquid level of pulse by measuring emission and the definite measured liquid of time that returns pulse, so measuring accuracy is high, and the sensor of other types is difficult to reach this precision.
4, measuring multiple parameters
The big characteristics of another of this fluid level measuring instrument are to integrate parameters such as measuring liquid level, interface, temperature.Because the liquid level sensor in the wireless fluid level measuring instrument can detect the continuous magnetic wave that produces with a kind of pulse, so can be furnished with 2 even a plurality of ball float on same sounding rod.As long as guarantee that the weight of ball float is corresponding with the weight of medium, then can record liquid level and interface simultaneously, real realization measuring multiple parameters.
If a plurality of temperature sensors are packed in the sounding rod of wireless fluid level measuring instrument, in the time of then can measuring liquid level, can also obtain multi-point temp in the medium and the medial temperature under the liquid level.
5, reliability height, failure rate is low, and the life-span is long
Because the whole liquid level sensor of wireless fluid level measuring instrument is sealed in the stainless-steel tube, its sensing element and measured medium noncontact be not so though constantly repeat, can cause any wearing and tearing to sensor yet in the process of measuring.Therefore, reliability height when it has work, the advantage that failure rate is low, the life-span is long are fit to various rugged surroundings.
The utility model is with wireless connect technology, wireless communication technique, and the powered battery technology applies to the magnetostrictive liquid level sensor and the dry-reed liquid level sensor of low-power consumption.Thereby the multipoint wireless that has realized liquid level, interface, temperature is measured in real time, and the computer centralized displaying is handled.With traditional liquid level instrument relatively, this technology is convenient when installing/dismounting, save a large amount of site operations, debugging and maintenance is faster, does not have electrical equipment to connect and uses safety and reliability.
Description of drawings:
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is the principle of work block diagram in the electronic compartment of the present utility model;
Fig. 3 is the principle of work block diagram of the receiving end that is used with the utility model.
Embodiment: the utility model is described further below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model provides a kind of wireless fluid level measuring instrument, and described wireless fluid level measuring instrument comprises electronic compartment 1, sounding rod 2 and ball float 3; Test circuit and wireless transceiver circuit are housed in the electronic compartment, are used for testing and the transmission signal.
Sounding rod 2 is arranged on the bottom of electronic compartment 1 by flange 5; Including being arranged on the sounding rod 2 of ball float 3 activities of magnet ring, that is to say, must guarantee that ball float 3 can do floating up and down on sounding rod 2, for example, can be to be enclosed within on the sounding rod 2; Be provided with baffle plate 6 in the bottom of sounding rod 2, be used for preventing that ball float 3 from coming off.Be provided with liquid level sensor in described sounding rod 2, described liquid level sensor is connected with electronic compartment 1.The electronic compartment power supply adopts the powered battery mode, and measurement data adopts wireless transmission method, installs and adopts explosion-resistant enclosure.Described sounding rod 2 is divided into outer tube and interior pipe, and described liquid level sensor setting on inner pipe.Described liquid level sensor can be selected magnetostrictive liquid level sensor or dry-reed liquid level sensor.The set-up mode of sensor can and require according to the precision of measuring to select; In the sounding rod outside, be with the stainless steel floating ball that includes magnet ring that can move with liquid level.Two ball floats that the sounding rod outside can be furnished with, measuring liquid level and interface respectively.
The outer tube of sounding rod 2 is made by corrosion resistant stainless-steel seamless pipe, so that protective effect to be provided; Also be fitted with temperature sensor in addition in sounding rod 2, temperature sensor is connected with electronic compartment 1, the temperature of the current fluid to be measured of collection that temperature sensor can be real-time.
Described ball float 3 be with the interior pipe that is arranged on sounding rod 2 on liquid level sensor be used, the magnet rings in the described ball float 3 are used for the induction of the information of carrying out with liquid level sensor.
In addition, also be provided with spacing alarm device 4 on sounding rod 2, spacing alarm device 4 is connected with electronic compartment 1, and near the spacing alarm devices to default position the time, spacing alarm device 4 is reported to the police when ball float 3.
This utility model is in the process of using, the sounding rod 2 that will have ball float 3 puts in tested liquid level, ball float 3 will float along with liquid level, at this moment, magnet ring in the ball float 3 and liquid level sensor induction, liquid level sensor just is passed to information in the electronic compartment 1, as shown in Figure 2, magnetostrictive liquid level sensor or dry-reed liquid level sensor are handled information transmission to measurement and data processing unit in the electronic compartment 1, through after communication and the Power Management Unit, launch through the wireless transmission transmitter unit more then; And temperature sensor also is that information is transferred out by measurement and data processing unit, communication and Power Management Unit and wireless transmission transmitter unit;
And data receiver will be as shown in Figure 2 on the other hand, receive by the wireless transmission receiving element, handle by data processing terminal then, show by display unit again, control by keyboard.
This utility model carries out level conversion and respective handling after wireless-modulated is launched with the signal that collects through the circuit unit in the electronic compartment 1, realized the wireless measurement of liquid level, interface, temperature.
The concrete advantage of this utility model is as follows:
1, easy to use
Wireless connections between electronic compartment and the receiving terminal, wireless communication tank gage makes on-the-spot easy installation and removal, has removed the worry of loaded down with trivial details cable wiring manufacture from, has saved a large amount of man power and materials, by wireless telecommunications, has realized long-distance transmissions.
2, safe
Wireless liquid level measuring instrument is adapted at the hazardous areas such as various inflammable, explosive, high temperature, high pressure and uses. The hidden danger of having avoided manual measurement, electrical equipment connection, site operation to bring.
3, precision height
Fluid level measuring instrument adopts magnetostriction principle, the liquid level of the pulse by measuring emission and the definite measured liquid of time that returns pulse, so certainty of measurement is high, and the sensor of other types is difficult to reach this precision.
4, measuring multiple parameters
The big characteristics of another of this fluid level measuring instrument are to integrate parameters such as measuring liquid level, interface, temperature. Because the liquid level sensor in the wireless liquid level measuring instrument can detect the continuous magnetic wave that the same pulse produces, so can be furnished with 2 even a plurality of ball float on same measuring stick. As long as guarantee that the weight of ball float is corresponding with the weight of medium, then can record simultaneously liquid level and interface, real realization measuring multiple parameters.
If a plurality of temperature sensors are packed in the measuring stick of wireless liquid level measuring instrument, when then liquid level can be measured, can also obtain multi-point temp in the medium and the mean temperature under the liquid level.
5, reliability height, failure rate is low, the life-span is long
Because the whole liquid level sensor of wireless liquid level measuring instrument is sealed in the stainless steel tube, its sensing element and measured medium noncontact be not so although constantly repeat, can cause any wearing and tearing to sensor yet in the process of measuring. Therefore, reliability height, failure rate is low, long advantage of life-span were fit to various adverse circumstances when it had work.
The utility model is with wireless connect technology, wireless communication technique, and the powered battery technology applies to magnetostrictive liquid level sensor or the dry-reed liquid level sensor of low-power consumption. Thereby the multipoint wireless that has realized liquid level, interface, temperature is measured in real time, and the computer centralized displaying is processed. With traditional tank gage relatively, this technology is convenient when installing/dismounting, save a large amount of site operations, debugging and maintenance is faster, does not have electrical equipment to connect and uses safety and reliability.
Claims (5)
1. wireless fluid level measuring instrument, it is characterized in that: described wireless fluid level measuring instrument mainly comprises electronic compartment (1), sounding rod (2) and ball float (3), and sounding rod (2) is arranged on the bottom of electronic compartment (1); The ball float (3) that includes magnet ring is movably arranged on the sounding rod (2); Be provided with liquid level sensor in described sounding rod (2), described liquid level sensor is connected with electronic compartment (1).
2. wireless fluid level measuring instrument according to claim 1 is characterized in that: described sounding rod (2) is divided into outer tube and interior pipe, and described liquid level sensor setting on inner pipe.
3. wireless fluid level measuring instrument according to claim 1 and 2 is characterized in that: described liquid level sensor can be selected magnetostrictive liquid level sensor or dry-reed liquid level sensor.
4. wireless fluid level measuring instrument according to claim 2 is characterized in that: also be provided with temperature sensor on the interior pipe of sounding rod (2), temperature sensor also is connected with electronic compartment (1).
5. wireless fluid level measuring instrument according to claim 1 is characterized in that: also be provided with the spacing alarm device on sounding rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200153317U CN201444070U (en) | 2009-07-16 | 2009-07-16 | Wireless liquid level measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200153317U CN201444070U (en) | 2009-07-16 | 2009-07-16 | Wireless liquid level measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201444070U true CN201444070U (en) | 2010-04-28 |
Family
ID=42548754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200153317U Expired - Fee Related CN201444070U (en) | 2009-07-16 | 2009-07-16 | Wireless liquid level measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201444070U (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228030A (en) * | 2013-04-12 | 2013-07-31 | 苏州博联科技有限公司 | Wireless sensor network oriented low power consumption node |
| CN103389173A (en) * | 2013-07-25 | 2013-11-13 | 南京络联测控技术有限公司 | Temperature measuring rod |
| CN104048734A (en) * | 2014-06-16 | 2014-09-17 | 深圳供电局有限公司 | Liquid level on-line monitoring system for power transformer cooling liquid |
| CN104344808A (en) * | 2013-08-04 | 2015-02-11 | 上海华测创时测控科技有限公司 | Static level gauge applied to liquid levels |
| CN104501912A (en) * | 2014-12-15 | 2015-04-08 | 重庆精科仪表制造有限责任公司 | Integrated remote transmission type magnetic floater liquid level meter |
| CN104568074A (en) * | 2014-11-28 | 2015-04-29 | 江门谦信化工发展有限公司 | Interface liquid level measurement system |
| CN105403138A (en) * | 2015-11-13 | 2016-03-16 | 太仓荣中机电科技有限公司 | Intelligent magnetostrictive displacement sensor |
| CN105547416A (en) * | 2016-02-04 | 2016-05-04 | 北京和光伟业传感技术有限公司 | Magnetostriction liquid level sensor |
| CN108594872A (en) * | 2018-05-24 | 2018-09-28 | 温岭市环力电器有限公司 | Ball float level controller |
| CN108716941A (en) * | 2018-06-21 | 2018-10-30 | 迈格仪表(成都)有限公司 | A kind of magnetostriction measuring multiple parameters transmitter |
| CN109813397A (en) * | 2019-04-01 | 2019-05-28 | 张永立 | A three-dimensional guided floating disc liquid level sensor |
| CN110174447A (en) * | 2019-06-17 | 2019-08-27 | 广饶大金科技有限公司 | A kind of split type more ginseng capacitor floating ball level meters |
| CN110595575A (en) * | 2019-10-18 | 2019-12-20 | 北京均友欣业科技有限公司 | An automatic gauge for storage tanks |
| WO2020147240A1 (en) * | 2019-01-17 | 2020-07-23 | 北京锐达仪表有限公司 | Magnetostrictive liquid level meter and liquid level measurement method |
| CN112393674A (en) * | 2020-10-28 | 2021-02-23 | 江门市英合创展电子有限公司 | Non-contact displacement sensor |
| CN119147079A (en) * | 2024-11-21 | 2024-12-17 | 潍坊亚峰化工仪表有限公司 | Self-correcting magnetostrictive liquid level meter and use method thereof |
-
2009
- 2009-07-16 CN CN2009200153317U patent/CN201444070U/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228030A (en) * | 2013-04-12 | 2013-07-31 | 苏州博联科技有限公司 | Wireless sensor network oriented low power consumption node |
| CN103389173A (en) * | 2013-07-25 | 2013-11-13 | 南京络联测控技术有限公司 | Temperature measuring rod |
| CN104344808A (en) * | 2013-08-04 | 2015-02-11 | 上海华测创时测控科技有限公司 | Static level gauge applied to liquid levels |
| CN104048734A (en) * | 2014-06-16 | 2014-09-17 | 深圳供电局有限公司 | Liquid level on-line monitoring system for power transformer cooling liquid |
| CN104568074A (en) * | 2014-11-28 | 2015-04-29 | 江门谦信化工发展有限公司 | Interface liquid level measurement system |
| CN104501912A (en) * | 2014-12-15 | 2015-04-08 | 重庆精科仪表制造有限责任公司 | Integrated remote transmission type magnetic floater liquid level meter |
| CN104501912B (en) * | 2014-12-15 | 2018-04-27 | 重庆精科仪表制造有限责任公司 | Integral type teletransmission type magnetic float level indicator |
| CN105403138A (en) * | 2015-11-13 | 2016-03-16 | 太仓荣中机电科技有限公司 | Intelligent magnetostrictive displacement sensor |
| CN105547416A (en) * | 2016-02-04 | 2016-05-04 | 北京和光伟业传感技术有限公司 | Magnetostriction liquid level sensor |
| CN105547416B (en) * | 2016-02-04 | 2018-09-18 | 北京和光伟业传感技术有限公司 | A kind of magnetostrictive liquid level sensor |
| CN108594872A (en) * | 2018-05-24 | 2018-09-28 | 温岭市环力电器有限公司 | Ball float level controller |
| CN108716941A (en) * | 2018-06-21 | 2018-10-30 | 迈格仪表(成都)有限公司 | A kind of magnetostriction measuring multiple parameters transmitter |
| CN108716941B (en) * | 2018-06-21 | 2024-02-02 | 迈格仪表(成都)有限公司 | Magnetostrictive multi-parameter measuring transmitter |
| WO2020147240A1 (en) * | 2019-01-17 | 2020-07-23 | 北京锐达仪表有限公司 | Magnetostrictive liquid level meter and liquid level measurement method |
| US11933656B2 (en) | 2019-01-17 | 2024-03-19 | Beijing Connetech Electronics Technology Co., Ltd. | Magnetostrictive liquid level meter using multiple waveguide wires and liquid level measurement method thereof |
| CN109813397A (en) * | 2019-04-01 | 2019-05-28 | 张永立 | A three-dimensional guided floating disc liquid level sensor |
| CN110174447A (en) * | 2019-06-17 | 2019-08-27 | 广饶大金科技有限公司 | A kind of split type more ginseng capacitor floating ball level meters |
| CN110595575A (en) * | 2019-10-18 | 2019-12-20 | 北京均友欣业科技有限公司 | An automatic gauge for storage tanks |
| CN112393674A (en) * | 2020-10-28 | 2021-02-23 | 江门市英合创展电子有限公司 | Non-contact displacement sensor |
| CN119147079A (en) * | 2024-11-21 | 2024-12-17 | 潍坊亚峰化工仪表有限公司 | Self-correcting magnetostrictive liquid level meter and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201444070U (en) | Wireless liquid level measuring instrument | |
| CN201885992U (en) | Direct-reading 6,000-meter CTD profiling system | |
| CN105067058A (en) | Non-contact measuring system and method for drainage pipeline fluid flow | |
| CN104654026A (en) | Oil and gas pipeline leakage acoustic emission inside detection system and method | |
| CN101592513A (en) | Ocean engineering sink tank water level monitor | |
| US20090031799A1 (en) | Float diagnostics for level measurement | |
| KR20100122538A (en) | Device for observing sea | |
| CN208075988U (en) | A kind of explosion-proof type magnetostriction liquidometer can measure multiple liquid levels | |
| CN107941367A (en) | 10kV distribution transformer oil temperatures oil level monitors and pressure release integrated apparatus | |
| CN113589227B (en) | Underwater robot positioning system and method | |
| CN107044870A (en) | A kind of multi-parameter portable warehousing and transportation facilities detector | |
| CN201016974Y (en) | Oil water-containing on-line measuring instrument and measuring display device | |
| CN102095512A (en) | Multipoint temperature detecting system with liquid level measuring function | |
| CN2916590Y (en) | Electronic water level meter for vessel | |
| CN206847677U (en) | A kind of multi-parameter portable warehousing and transportation facilities detector | |
| CN204313927U (en) | A kind of explosion-proof type radar level gauge | |
| CN107063391B (en) | A non-contact dual level intelligent detection system | |
| CN203099303U (en) | Measuring device of holder level, holder volume and holder speed of gas holder | |
| CN210625783U (en) | Liquid level monitoring alarm device | |
| CN214333949U (en) | A liquid level detection device and liquid supply device | |
| CN114609344A (en) | Concentration measuring device | |
| CN209484288U (en) | Integral intelligent pipeline | |
| CN209541853U (en) | A kind of guided wave formula radar tidal level station | |
| CN201935740U (en) | Multipoint temperature detecting device with liquid level measurement function | |
| RU102263U1 (en) | WATER ENVIRONMENT MONITORING SYSTEM TO ENSURE SAFETY OF MARINE ACTIVITIES |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20120716 |