CN1746644A - Pressure sensor in deep-sea and use thereof - Google Patents
Pressure sensor in deep-sea and use thereof Download PDFInfo
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- CN1746644A CN1746644A CN 200510094696 CN200510094696A CN1746644A CN 1746644 A CN1746644 A CN 1746644A CN 200510094696 CN200510094696 CN 200510094696 CN 200510094696 A CN200510094696 A CN 200510094696A CN 1746644 A CN1746644 A CN 1746644A
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Abstract
A pressure transducer used in deep sea is featured as setting piston mechanism for sealed oil cavity of pressure transducer, forming piston mechanism by tube body and piston, forming piston cavity by sealing tube front end with piston and realizing shrink fit between piston and tube body internal wall, enabling piston to move axially in tube when frictional force is overcome by piston, connecting piston cavity through to sealed oil cavity of pressure transducer and filling there full of oil.
Description
Technical field:
The present invention relates to Ocean Surveying and sensing technology, particularly the deep-sea big flood pressure survey under water and the measurement of slight pressure variation.
Background technology:
Pressure sensor in deep-sea is a kind of important sensor of bathymetric survey, the precision of bathymetric survey depends on the performance of pressure transducer, only can measure the big hydraulic pressure at deep-sea, energy measurement goes out the pressure transducer of small hydraulic pressure again, could obtain the accurate position of the depth of water in the deep-sea such as underwater robot or underwater vehicle.Existing pressure transducer Chinese patent discloses 94112019.8 and has proposed a kind of pressure transducer of automatic compensating static, but owing to utilized solenoid valve, makes structure complicated, and solenoid valve also difficult control under the depth of water.Chinese patent discloses 02159057.5 measuring method and the device thereof that has proposed a kind of water depth pressure, but this invention has utilized the infiltration plate, in the complex environment under the ocean water, cannot say for sure to demonstrate,prove stable permeability, utilized two sensors to make that physical dimension may be bigger, and the precision of this invention static pressure also depends on traditional pressure transducer, thereby the difficult precision that directly improves bathymetric survey.
Summary of the invention:
Technical matters to be solved by this invention is to avoid above-mentioned existing in prior technology weak point, a kind of simple in structure, dependable performance is provided, can be competent at the pressure sensor in deep-sea and the application thereof of any depth of water water-pressure survey in deep-sea.
The technical scheme that technical solution problem of the present invention is adopted is:
Pressure sensor in deep-sea, its design feature is the oil closed cavity at pressure sensor device, piston mechanism is set, constitute by body and piston, the front end of body forms plunger shaft by described piston closes, is interference fit between the inwall of piston and body, and piston can form in body after overcome friction and move axially, plunger shaft communicates with the oil closed cavity of described pressure sensor device, and is full of fluid.
Obtain the method for small hydraulic signal with pressure sensor in deep-sea of the present invention, be characterized under small variation in water pressure, piston remains on the former axial invariant position in the body, records pressure sensor device oil pocket inside and outside differential pressure signal with the force sensing element in the pressure sensor device and is measured signal.
Obtain the method for sudden change differential pressure signal with pressure sensor in deep-sea of the present invention, be characterized in suddenling change for hydraulic pressure, piston moving axially in body presents hysteresis, the response of pressure sensor device oil pocket internal pressure lags behind thereupon, because of lagging behind, pressure sensor device oil pocket internal pressure maintains original value, be subjected to the suddenling change acting force of hydraulic pressure of the force sensing element in the pressure sensor device, obtains the differential pressure signal before and after the hydraulic pressure sudden change.
Obtain the method for the big pressure signal of deep water with pressure sensor in deep-sea of the present invention, be characterized in for the big pressure signal of the depth of water, piston presents discontinuity and moves along with the increasing of the depth of water, discontinuity corresponding to piston moves, the pressure sensor device detection signal presents undulatory property to be changed, obtain the fluctuation peak value of pressure signal in the whole depth of water variation or the number of null value, according to the piston mobility, calculate big water pressure and the basic water depth value corresponding with it, the slight pressure signal real-time in conjunction with sensing device reaches with it pairing less water depth value, obtains the big flood force value and the deep water degree of depth pairing with it accurately.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, sensor construction of the present invention is simple, very easily implements on the basis of existing pressure sensor device.
2, the present invention is directed to same sensor base, its range can pass through the difference setting of the maximum static friction force of piston is freely selected, under the not high condition of the precision of pressure sensor device own, can obtain higher big flood pressure signal of precision and deep-sea water depth value.
3, the present invention can obtain the differential pressure value of the higher pressure jump of under the big pressure of deep water precision.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is another embodiment structural representation of the present invention.
Number in the figure: 1 pressure sensor device, 2 bodys, 3 pistons, 4 plunger shaft, 5 oil circuits, 6 oil closed cavities.
Embodiment:
Referring to Fig. 1, the present embodiment pressure sensor in deep-sea is the oil closed cavity 6 at pressure sensor device 1, piston mechanism is set, constitute by body 2 and piston 3, the front end of body 2 becomes plunger shaft 4 by piston 3 enclosed shapes, is interference fit between the inwall of piston 3 and body 2, and piston 3 can form in body 2 after overcome friction and move axially, plunger shaft 4 communicates with the oil closed cavity 6 of pressure sensor device 1, and is full of fluid.
In concrete the enforcement, the pressure sensor device 1 shown in Fig. 1 is the split setting with piston mechanism, is connected by pipeline 5 between the oil closed cavity 6 of plunger shaft 4 and pressure sensor device 1.
Referring to Fig. 2, in concrete the enforcement, pressure sensor device 1 also can be the integral body setting with piston mechanism, and the oil closed cavity 6 of pressure sensor device 1 is same cavity with the plunger shaft 4 of piston mechanism.
Obtain the method for small hydraulic signal with the present embodiment sensor:
Utilize the discontinuity of piston to move, in a certain less pressure range, insufficient pressure suffered on the piston is to overcome its maximum static friction force, thereby piston remains on the former axial invariant position in the body, the inside and outside pressure reduction that forms of the oil pocket of pressure sensor device, the pressure difference signal that records inside and outside its oil pocket with the force sensing element in the pressure sensor device is and the corresponding pressure signal of tested small variation in water pressure.
Obtain the method for sudden change differential pressure signal with the present embodiment sensor:
When the sensor external water pressure takes place to change suddenly, suddenly change for hydraulic pressure, because of overcome friction, piston moving axially in body presents hysteresis, the response of pressure sensor device oil pocket internal pressure lags behind thereupon, and because of lagging behind, pressure sensor device oil pocket internal pressure maintains original value, with be subjected to the suddenling change acting force of hydraulic pressure of the force sensing element in the pressure sensor device, obtain and the hydraulic pressure corresponding differential pressure signal that suddenlys change.
Obtain the method for the big pressure signal of deep water with the present embodiment sensor:
Because of the needs of overcome friction, mobile the present discontinuity of piston in body in a certain less depth of water scope, acts on the maximum static friction force of making a concerted effort to be less than or equal to piston of hydraulic pressure on the piston, and piston does not move, the inside and outside pressure reduction that forms of oil pocket; Change in the depth of water and to exceed a certain scope, act on the making a concerted effort greater than the maximum static friction force of piston of hydraulic pressure on the piston, piston moves, and the inside and outside pressure of sensor tends to balance; For the big pressure signal of the depth of water, piston presents discontinuity and moves along with the increasing of the depth of water, discontinuity corresponding to piston moves, the pressure sensor device detection signal presents undulatory property to be changed, calculate the fluctuation peak value of pressure signal in the whole depth of water variation or the number of null value, according to the piston mobility, calculate big water pressure and the basic water depth value corresponding with it, the slight pressure signal real-time in conjunction with sensing device reaches with it pairing less water depth value, obtains the big flood force value and the deep water degree of depth pairing with it accurately.
Claims (6)
1, pressure sensor in deep-sea, it is characterized in that oil closed cavity (6) at pressure sensor device (1), piston mechanism is set, constitute by body (2) and piston (3), the front end of body (2) becomes plunger shaft (4) by described piston (3) enclosed shape, between the inwall of piston (3) and body (2) is interference fit, piston (3) can form in body (2) after overcome friction and move axially, plunger shaft (4) communicates with the oil closed cavity (6) of described pressure sensor device (1), and is full of fluid.
2, pressure sensor in deep-sea according to claim 1 is characterized in that described pressure sensor device (1) and piston mechanism split setting, is connected by pipeline (5) between the oil closed cavity (6) of plunger shaft (4) and pressure sensor device (1).
3, pressure sensor in deep-sea according to claim 1 is characterized in that described pressure sensor device (1) and piston mechanism are provided with for whole, and the oil closed cavity (6) of pressure sensor device (1) is same cavity with the plunger shaft (4) of piston mechanism.
4, a kind of method of obtaining small hydraulic signal with the described sensor of claim 1, it is characterized in that under small variation in water pressure, piston remains on the former axial invariant position in the body, records pressure sensor device oil pocket inside and outside differential pressure signal with the force sensing element in the pressure sensor device and is measured signal.
5, a kind of method of obtaining the sudden change differential pressure signal with the described sensor of claim 1, it is characterized in that suddenling change for hydraulic pressure, piston moving axially in body presents hysteresis, the response of pressure sensor device oil pocket internal pressure lags behind thereupon, because of lagging behind, pressure sensor device oil pocket internal pressure maintains original value, be subjected to the suddenling change acting force of hydraulic pressure of the force sensing element in the pressure sensor device, obtains and the hydraulic pressure corresponding differential pressure signal that suddenlys change.
6, a kind of method of obtaining the big pressure signal of deep water with the described sensor of claim 1, it is characterized in that for the big pressure signal of the depth of water, piston presents discontinuity and moves along with the increasing of the depth of water, discontinuity corresponding to piston moves, the pressure sensor device detection signal presents undulatory property to be changed, obtain the fluctuation peak value of pressure signal in the whole depth of water variation or the number of null value, according to the piston mobility, calculate big water pressure and the basic water depth value corresponding with it, the slight pressure signal real-time in conjunction with sensing device reaches with it pairing less water depth value, obtains the big flood force value and the deep water degree of depth pairing with it accurately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510094696XA CN100359309C (en) | 2005-09-30 | 2005-09-30 | Pressure sensor in deep-sea and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510094696XA CN100359309C (en) | 2005-09-30 | 2005-09-30 | Pressure sensor in deep-sea and use thereof |
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| Publication Number | Publication Date |
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| CN1746644A true CN1746644A (en) | 2006-03-15 |
| CN100359309C CN100359309C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200510094696XA Expired - Fee Related CN100359309C (en) | 2005-09-30 | 2005-09-30 | Pressure sensor in deep-sea and use thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359766A (en) * | 2011-09-15 | 2012-02-22 | 中国科学院半导体研究所 | Fiber body strain gauge |
| CN102506832A (en) * | 2011-10-26 | 2012-06-20 | 华侨大学 | Device for testing depth of encroached sea water |
| CN102519438A (en) * | 2011-10-18 | 2012-06-27 | 金华职业技术学院 | Water depth measuring instrument |
| CN105258826A (en) * | 2015-11-17 | 2016-01-20 | 湖南科技大学 | Underwater tensile force measurement device |
| CN108613770A (en) * | 2018-05-14 | 2018-10-02 | 合肥工业大学 | The measurement method of balance pressure sensor and hydraulic pressure and air pressure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322814B (en) * | 2011-09-15 | 2013-12-04 | 中国科学院半导体研究所 | Optical fiber drilling strain gauge |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU661280A1 (en) * | 1977-01-03 | 1979-05-05 | Башкирский государственный научно-исследовательский и проектный институт нефтяной промышленности | Deep-water remote-indication pressure gauge |
| CN1220039C (en) * | 2002-12-27 | 2005-09-21 | 中国科学院力学研究所 | Measuring method and its device for deep water pressure |
| GB2400912A (en) * | 2003-04-23 | 2004-10-27 | Abb Offshore Systems Ltd | Indirect fluid pressure determination in extraction wells |
| CN1221792C (en) * | 2003-10-29 | 2005-10-05 | 中国科学院力学研究所 | Device of combined sensor in use for measuring dynamical pressure and static pressure in deep sea |
| CN2833544Y (en) * | 2005-09-30 | 2006-11-01 | 合肥工业大学 | Deep-sea pressure transducer |
-
2005
- 2005-09-30 CN CNB200510094696XA patent/CN100359309C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359766A (en) * | 2011-09-15 | 2012-02-22 | 中国科学院半导体研究所 | Fiber body strain gauge |
| CN102359766B (en) * | 2011-09-15 | 2013-06-26 | 中国科学院半导体研究所 | Fiber body strain gauge |
| CN102519438A (en) * | 2011-10-18 | 2012-06-27 | 金华职业技术学院 | Water depth measuring instrument |
| CN102506832A (en) * | 2011-10-26 | 2012-06-20 | 华侨大学 | Device for testing depth of encroached sea water |
| CN102506832B (en) * | 2011-10-26 | 2013-12-18 | 华侨大学 | Device for testing depth of encroached sea water |
| CN105258826A (en) * | 2015-11-17 | 2016-01-20 | 湖南科技大学 | Underwater tensile force measurement device |
| CN105258826B (en) * | 2015-11-17 | 2016-12-07 | 湖南科技大学 | One tension measuring device under water |
| CN108613770A (en) * | 2018-05-14 | 2018-10-02 | 合肥工业大学 | The measurement method of balance pressure sensor and hydraulic pressure and air pressure |
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| Publication number | Publication date |
|---|---|
| CN100359309C (en) | 2008-01-02 |
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Granted publication date: 20080102 Termination date: 20100930 |