CN111749681A - Pressure sensor for monitoring oil well pressure - Google Patents
Pressure sensor for monitoring oil well pressure Download PDFInfo
- Publication number
- CN111749681A CN111749681A CN201910245406.9A CN201910245406A CN111749681A CN 111749681 A CN111749681 A CN 111749681A CN 201910245406 A CN201910245406 A CN 201910245406A CN 111749681 A CN111749681 A CN 111749681A
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- elastic diaphragm
- pressure sensor
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- acoustic wave
- surface acoustic
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- 239000003129 oil well Substances 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 238000010897 surface acoustic wave method Methods 0.000 claims abstract description 33
- 238000003825 pressing Methods 0.000 claims description 31
- 239000003292 glue Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a pressure sensor for monitoring oil well pressure, comprising: the inner cavity of the casing is provided with a small-diameter section, a medium-diameter section and a large-diameter section which are sequentially connected, and the end part of the small-diameter section is communicated with the wellhead of the oil well; the elastic diaphragm is arranged in the large-diameter section and seals the sleeve; the surface acoustic wave device is connected with the elastic diaphragm and synchronously moves with the elastic diaphragm; the clamping ring is arranged in the large-diameter section and far away from the small-diameter section relative to the elastic diaphragm, a cavity is formed between the clamping ring and the elastic diaphragm, and the surface acoustic wave device is located in the cavity. The invention solves the problem that the pressure sensor in the prior art is not suitable for liquid measurement occasions.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a pressure sensor for monitoring the pressure of an oil well.
Background
The pressure sensor is a common sensor which is extremely important in industrial production and process control, and has wide application in the petroleum and petrochemical industry. In order to effectively control the petroleum production quality, the wellhead pressure is a necessary monitoring quantity, and the pressure sensor is applied in the aspect of the development process from manual meter reading of a mechanical pressure gauge and automatic collection of an electronic pressure gauge to a pressure transmitter, but most of oil production wells still have no pre-buried sensors and cables due to historical reasons at present, and have no automatic collection and transformation conditions or overlarge transformation cost. In response to this situation, wireless pressure sensors are becoming a major trend in automated wellhead pressure acquisition. At present, a wellhead wireless pressure sensor which is mainly applied mainly depends on the combination of a traditional pressure transmitter, a wireless module and a battery to realize wireless pressure sensing, and has the advantages of mature technology and reliable detection result, but because the battery is used for supplying power, the acquisition frequency cannot be further improved (generally, the acquisition is carried out once in 10-20 minutes), and the standard that the acquisition is carried out once in 15 seconds cannot be achieved. On the other hand, the battery capacity cannot be increased at a glance from the viewpoint of safety and explosion prevention. Certain bottlenecks are caused to the monitoring dynamics and further high-value application realized through the big data of the Internet of things.
The passive wireless sensing technology is a novel sensing technology developed in recent years, and has the greatest advantage that no battery is needed to supply power to one side of the sensor, so that additional problems such as battery service life and the like do not need to be considered if the sensor is not damaged, the acquisition frequency is not limited by the battery capacity, and the intrinsic safety is very easy to realize in an explosion-proof environment. An important method for realizing passive wireless sensing is a Surface Acoustic Wave (SAW) sensing technology. However, the main form of the existing surface acoustic wave wireless pressure sensor adopts a cantilever beam type, and is not suitable for occasions of liquid measurement such as oil fields, and the like, so that the structure of the surface acoustic wave wireless pressure sensor needs to be improved, the surface acoustic wave wireless pressure sensor is suitable for field application such as the oil fields, and the like, and the installation convenience and the structural reliability of the wireless pressure sensor are improved.
Disclosure of Invention
The invention mainly aims to provide a pressure sensor for monitoring the pressure of an oil well, which aims to solve the problem that the pressure sensor in the prior art is not suitable for liquid measurement occasions.
In order to achieve the above object, the present invention provides a pressure sensor for well pressure monitoring, comprising: the inner cavity of the casing is provided with a small-diameter section, a medium-diameter section and a large-diameter section which are sequentially connected, and the end part of the small-diameter section is communicated with the wellhead of the oil well; the elastic diaphragm is arranged in the large-diameter section and seals the sleeve; the surface acoustic wave device is connected with the elastic diaphragm and synchronously moves with the elastic diaphragm; the clamping ring is arranged in the large-diameter section and far away from the small-diameter section relative to the elastic diaphragm, a cavity is formed between the clamping ring and the elastic diaphragm, and the surface acoustic wave device is located in the cavity.
Further, the end face of the pressing ring has a protruding portion that protrudes toward the elastic diaphragm, and the pressure sensor further includes a first seal member that is provided between the protruding portion and the elastic diaphragm to seal a gap between the protruding portion and the elastic diaphragm.
Further, the sleeve has a stepped structure, the elastic diaphragm is disposed at the stepped structure, and the pressure sensor further includes a second sealing member disposed between a stepped surface of the stepped structure and the elastic diaphragm.
Further, the surface acoustic wave device is disposed on a side of the elastic diaphragm close to the pressing ring.
Further, the pressing ring is provided with a closable opening, and the opening is communicated with the cavity.
Further, the pressure sensor further includes: the antenna is connected with one end of the casing which does not extend into the oil well; and the antenna wiring board is arranged on the pressing ring and is electrically connected with the surface acoustic wave device and the antenna.
Further, the antenna terminal block is disposed on a side of the pressing ring facing away from the elastic diaphragm.
Further, the antenna terminal block has a threading hole through which a wire passes, the threading hole being located at the center of the antenna terminal block.
Further, at least a part of the antenna is sleeved outside the sleeve and is in interference fit with the sleeve.
Further, the surface acoustic wave device is bonded at the center of the elastic diaphragm by a high temperature resistant elastic adhesive.
Further, the end of the casing extending into the well has a connection structure.
By applying the technical scheme of the invention, the elastic diaphragm and the pressing ring are arranged in the sleeve, so that the elastic diaphragm and the pressing ring form a closed cavity. Because the elastic diaphragm can be deformed along with the change of the pressure in the casing, the surface acoustic wave device on the elastic diaphragm is triggered, so that the surface acoustic wave device can feel the pressure in the casing, the change of the pressure in the oil well is reflected, meanwhile, the arrangement of the small-diameter section, the medium-diameter section and the large-diameter section enables oil gas in the oil well to better enter the casing, the oil gas can be effectively applied to the elastic diaphragm, and the use requirement of the oil well site is met. The above-mentioned mode of setting up has combined the characteristics of sensor field application, the structure to pressure sensor energy has been improved, make it be applicable to field application such as oil field, pressure sensor's installation convenience and structural reliability have been improved, and do not need pre-buried sensor and cable, be applicable to various oil wells, pressure sensor does not need the design of battery simultaneously, on the one hand pressure sensor's collection frequency has been improved, the demand for detection has been satisfied, on the other hand the waste and the security problem that the battery is easily exploded and arouse that the battery of change brings have been avoided, on-the-spot safety has been guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic of the pressure sensor of the present invention; and
fig. 2 shows an enlarged view at P in fig. 1.
Wherein the figures include the following reference numerals:
10. a sleeve; 11. a connecting structure; 20. an elastic diaphragm; 30. a surface acoustic wave device; 40. pressing a ring; 41. a protruding portion; 42. opening a hole; 50. a first seal member; 60. a second seal member; 70. an antenna; 80. an antenna patch panel.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In order to solve the problem that the pressure sensor in the prior art is not suitable for a liquid measurement occasion, the invention provides a pressure sensor for oil well pressure monitoring.
As shown in fig. 1 and 2, the pressure sensor for monitoring the pressure of the oil well comprises a casing 10, an elastic diaphragm 20, a surface acoustic wave device 30 and a pressing ring 40, wherein the inner cavity of the casing 10 is provided with a small-diameter section, a middle-diameter section and a large-diameter section which are sequentially connected, and the end part of the small-diameter section is communicated with the wellhead of the oil well; the elastic membrane 20 is arranged in the large-diameter section and seals the sleeve 10; the surface acoustic wave device 30 is connected with the elastic diaphragm 20 and moves synchronously with the elastic diaphragm 20; the pressing ring 40 is disposed in the large diameter section and away from the small diameter section relative to the elastic diaphragm 20, a cavity is formed between the pressing ring 40 and the elastic diaphragm 20, and the surface acoustic wave device 30 is located in the cavity.
In the embodiment, the elastic diaphragm 20 and the pressing ring 40 are arranged in the sleeve 10, so that the elastic diaphragm 20 and the pressing ring 40 form a closed cavity, the elastic diaphragm 20 can deform along with the change of the pressure in the sleeve 10, and therefore the surface acoustic wave device 30 on the elastic diaphragm 20 is triggered, the surface acoustic wave device 30 senses the pressure in the sleeve 10, and therefore the change of the pressure in an oil well is reflected, meanwhile, the oil gas in the oil well can better enter the sleeve through the arrangement of the small-diameter section, the middle-diameter section and the large-diameter section, the oil gas can more effectively act on the elastic diaphragm 20, and the use requirement of the oil well site is met. The above-mentioned mode of setting up has combined the characteristics of sensor field application, the structure to pressure sensor energy has been improved, make it be applicable to field application such as oil field, pressure sensor's installation convenience and structural reliability have been improved, and do not need pre-buried sensor and cable, be applicable to various oil wells, pressure sensor does not need the design of battery simultaneously, on the one hand pressure sensor's collection frequency has been improved, the demand for detection has been satisfied, on the other hand the waste and the security problem that the battery is easily exploded and arouse that the battery of change brings have been avoided, on-the-spot safety has been guaranteed.
Preferably, the elastic membrane 20 is an elastic metal sheet.
In the present embodiment, the end surface of the pressing ring 40 has the protruding portion 41, the protruding portion 41 protrudes toward the elastic diaphragm 20, and the pressure sensor further includes the first seal 50, and the first seal 50 is provided between the protruding portion 41 and the elastic diaphragm 20 to seal the gap between the protruding portion 41 and the elastic diaphragm 20. The pressing ring 40 is formed by combining a plate-shaped part and an extending part 41, wherein the extending part 41 is in an annular structure, the plate-shaped part is arranged at an opening at one end of the annular structure, the elastic diaphragm 20 is arranged at an opening at the other end of the annular structure, so that a cavity is defined by the elastic diaphragm 20, a first sealing ring 50 is arranged between the end part of the annular structure and the elastic diaphragm 20, the cavity is closed, and the accuracy of detection is ensured.
Optionally, the sleeve 10 has a stepped structure, the elastic diaphragm 20 is disposed at the stepped structure and located at one side with a larger diameter, the pressure sensor further includes a second sealing element 60, i.e., a second sealing ring, the second sealing element 60 is disposed between a stepped surface of the stepped structure and the elastic diaphragm 20, so as to further ensure the airtightness of the cavity, and at the same time, the first sealing element 50 and the second sealing element 60 fix the elastic diaphragm 20 from two sides of the elastic diaphragm 20, so that the position of the elastic diaphragm 20 is kept stable, so as to more accurately reflect the pressure change.
Alternatively, the surface acoustic wave device 30 is disposed on the side of the elastic diaphragm 20 close to the pressing ring 40 by means of high temperature resistant elastic glue bonding, and is located at the center of the elastic diaphragm 20, so that the surface acoustic wave device 30 is located in the cavity, which detects a change in pressure by a change in the elastic diaphragm 20.
In this embodiment, in order to facilitate the installation of the pressing ring 40 in the sleeve 10, a closable opening 42 is provided on an end surface of the pressing ring 40 away from the elastic diaphragm 20, the opening 42 is communicated with the cavity, so that when the pressing ring 40 is installed in the sleeve 10 and is matched with the elastic diaphragm 20, the opening 42 is opened, the gas between the pressing ring 40 and the elastic diaphragm 20 can be discharged through the opening 42, the pressing ring 40 is prevented from being unable to be installed in the sleeve 10 due to the action of gas pressure, and after the pressing ring 40 is installed in the sleeve 10, nitrogen or other inert gases are injected into the cavity through the opening 42 as a protective gas, and after the partial installation of the pressing ring 40 is completed, the opening 42 is closed, so that the tightness of the cavity can be ensured.
In this embodiment, the pressure sensor further comprises an antenna 70 and an antenna patch 80, the antenna 70 being connected to the end of the casing 10 not extending into the well; the antenna wiring board 80 is provided on the pressing ring 40 by means of gluing or bolting, and is electrically connected to the surface acoustic wave device 30 and the antenna 70.
Specifically, a threading hole for a lead to pass through is formed in the plate-shaped portion of the pressing ring 40, the threading hole is located in the center of the antenna wiring board 80, the antenna wiring board 80 is installed on one side of the pressing ring 40, which is away from the elastic diaphragm 20, the antenna wiring board 80 is electrically connected with the surface acoustic wave device 30 through the lead and is connected with the antenna 70 through a feeder line, and therefore a detection signal obtained by the surface acoustic wave device 30 can be transmitted to the antenna 70 through the lead and the antenna wiring board 80 to perform subsequent processing and analysis.
Optionally, at least a portion of the antenna 70 is disposed outside the sleeve 10 and is in interference fit with the sleeve 10, or may be connected by way of a threaded fit.
In this embodiment, the end of the casing 10 that extends into the well has an external thread as a connection structure 11 for cooperation with the well in order to connect the pressure sensor to the wellhead of the well. In addition, the shape of the casing 10 may be provided with a plurality of segments or a plurality of grooves according to the requirements of the field, and other corresponding arrangements may be performed according to the requirements, so as to facilitate the installation and use of the pressure sensor.
The specific process steps of this example are as follows
1. Bonding the surface acoustic wave device 30 to the center of the elastic diaphragm 20;
2. placing a second sealing ring in the shell, placing an elastic diaphragm 20 above the second sealing ring, and placing a first sealing ring on the elastic diaphragm 20;
3. connecting one end of the lead to the surface acoustic wave device 30;
4. the other end of the lead passes through the threading hole on the pressing ring 40;
5. placing the pressing ring 40 on the first sealing ring above the elastic diaphragm 20 and screwing;
6. connecting the wires to the antenna patch panel 80;
7. filling nitrogen into the inner space of the pressing ring 40 through the opening 42, and sealing the opening 42 after filling;
8. the feeder is connected to the antenna terminal block 80, and the antenna 70 is connected to the bushing 10.
It should be noted that, a plurality in the above embodiments means at least two.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the problem that the pressure sensor in the prior art is not suitable for liquid measurement occasions is solved;
2. the characteristics of field application of the sensor are combined, so that the sensor is suitable for field application in oil fields and the like;
3. the installation is convenient, and the structure is stable and reliable;
4. and the sensor and the cable do not need to be embedded, and the device is suitable for various oil wells.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A pressure sensor for well pressure monitoring, comprising:
the oil well comprises a casing (10), wherein an inner cavity of the casing (10) is provided with a small-diameter section, a medium-diameter section and a large-diameter section which are sequentially connected, and the end part of the small-diameter section is communicated with a well head of an oil well;
an elastic diaphragm (20), wherein the elastic diaphragm (20) is arranged in the large-diameter section and seals the sleeve (10);
the surface acoustic wave device (30), the said surface acoustic wave device (30) is connected with said elastic diaphragm (20), and move with said elastic diaphragm (20) synchronously;
a clamping ring (40), the clamping ring (40) is arranged in the large-diameter section and far away from the small-diameter section relative to the elastic diaphragm (20), a cavity is formed between the clamping ring (40) and the elastic diaphragm (20), and the surface acoustic wave device (30) is positioned in the cavity.
2. The pressure sensor according to claim 1, wherein an end face of the pressing ring (40) has a protruding portion (41), the protruding portion (41) protruding toward the elastic diaphragm (20), the pressure sensor further comprising a first seal member (50), the first seal member (50) being provided between the protruding portion (41) and the elastic diaphragm (20) to seal a gap between the protruding portion (41) and the elastic diaphragm (20).
3. The pressure sensor according to claim 1, wherein the sleeve (10) has a stepped structure at which the elastic diaphragm (20) is disposed, the pressure sensor further comprising a second seal (60), the second seal (60) being disposed between a stepped surface of the stepped structure and the elastic diaphragm (20).
4. A pressure sensor according to claim 1, wherein the surface acoustic wave device (30) is provided on a side of the elastic diaphragm (20) close to the pressure ring (40).
5. A pressure sensor according to claim 1, wherein the clamping ring (40) has a closable opening (42), the opening (42) communicating with the cavity.
6. The pressure sensor of claim 1, further comprising:
an antenna (70), the antenna (70) being connected to an end of the casing (10) not extending into the well;
an antenna terminal plate (80), the antenna terminal plate (80) being provided on the pressing ring (40) and electrically connected to the surface acoustic wave device (30) and the antenna (70).
7. A pressure sensor according to claim 6, characterised in that the antenna terminal block (80) is arranged on the side of the pressure ring (40) facing away from the elastic diaphragm (20).
8. The pressure sensor according to claim 6, wherein the antenna terminal plate (80) has a threading hole through which a wire passes, the threading hole being located at a center of the antenna terminal plate (80).
9. A pressure sensor according to claim 6, wherein at least a portion of the antenna (70) is fitted around the outside of the sleeve (10) and has an interference fit with the sleeve (10).
10. A pressure sensor according to claim 1, wherein the surface acoustic wave device (30) is bonded at the center of the elastic diaphragm (20) by a high temperature resistant elastic glue.
11. A pressure sensor according to claim 1, characterized in that the end of the casing (10) that protrudes into the oil well is provided with a connection structure (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245406.9A CN111749681B (en) | 2019-03-28 | 2019-03-28 | Pressure sensor for monitoring oil well pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245406.9A CN111749681B (en) | 2019-03-28 | 2019-03-28 | Pressure sensor for monitoring oil well pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111749681A true CN111749681A (en) | 2020-10-09 |
| CN111749681B CN111749681B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910245406.9A Active CN111749681B (en) | 2019-03-28 | 2019-03-28 | Pressure sensor for monitoring oil well pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300784A (en) * | 2005-04-21 | 2006-11-02 | Epson Toyocom Corp | Saw pressure sensor |
| CN101251599A (en) * | 2007-12-28 | 2008-08-27 | 哈尔滨工业大学深圳研究生院 | Wireless passive sonic surface wave mixed parameter measuring sensor and parameters analysis method |
| CN101620018A (en) * | 2009-08-06 | 2010-01-06 | 浙江大学 | Surface acoustic wave pressure sensor |
| CN102052986A (en) * | 2010-11-18 | 2011-05-11 | 华中科技大学 | Wireless passive surface acoustic wave (SAW) impedance load transducer |
| CN102169036A (en) * | 2010-12-06 | 2011-08-31 | 北京理工大学 | High-temperature (600 DEG C) pressure measurement passive wireless surface acoustic wave sensor |
| CN103499024A (en) * | 2013-10-22 | 2014-01-08 | 天津七一二通信广播有限公司 | Surface acoustic wave pressure sensor for oil pipeline leak detection system |
| CN204441450U (en) * | 2015-04-01 | 2015-07-01 | 常州智梭传感科技有限公司 | A kind of Passive Wireless SAW Sensors for chemical reaction pot/blending tank |
| US20160025580A1 (en) * | 2013-03-26 | 2016-01-28 | Denso Corporation | Pressure sensor |
-
2019
- 2019-03-28 CN CN201910245406.9A patent/CN111749681B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300784A (en) * | 2005-04-21 | 2006-11-02 | Epson Toyocom Corp | Saw pressure sensor |
| CN101251599A (en) * | 2007-12-28 | 2008-08-27 | 哈尔滨工业大学深圳研究生院 | Wireless passive sonic surface wave mixed parameter measuring sensor and parameters analysis method |
| CN101620018A (en) * | 2009-08-06 | 2010-01-06 | 浙江大学 | Surface acoustic wave pressure sensor |
| CN102052986A (en) * | 2010-11-18 | 2011-05-11 | 华中科技大学 | Wireless passive surface acoustic wave (SAW) impedance load transducer |
| CN102169036A (en) * | 2010-12-06 | 2011-08-31 | 北京理工大学 | High-temperature (600 DEG C) pressure measurement passive wireless surface acoustic wave sensor |
| US20160025580A1 (en) * | 2013-03-26 | 2016-01-28 | Denso Corporation | Pressure sensor |
| CN103499024A (en) * | 2013-10-22 | 2014-01-08 | 天津七一二通信广播有限公司 | Surface acoustic wave pressure sensor for oil pipeline leak detection system |
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| CN111749681B (en) | 2023-04-25 |
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