CN108181039A - Hydrostatic sensor - Google Patents
Hydrostatic sensor Download PDFInfo
- Publication number
- CN108181039A CN108181039A CN201711476929.1A CN201711476929A CN108181039A CN 108181039 A CN108181039 A CN 108181039A CN 201711476929 A CN201711476929 A CN 201711476929A CN 108181039 A CN108181039 A CN 108181039A
- Authority
- CN
- China
- Prior art keywords
- housing
- diaphragm
- bag
- flexible air
- circuit board
- 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.)
- Granted
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 239000002775 capsule Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/164—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid using a diaphragm, bellow as transmitting element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/14—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means involving the displacement of magnets, e.g. electromagnets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
It is long that the present invention provides a kind of service life,The high hydrostatic sensor of accuracy of detection,Including the housing with cavity,The measurement pipeline of housing side is connected to along radially extending for housing,The cavity junction for measuring pipeline and housing is provided with diaphragm,From the liquid effects of pipeline entrance are measured in the lower section of diaphragm,Flexible air-bag is provided with above diaphragm,The lower surface of flexible air-bag is mutually fixedly connected with the upper surface of diaphragm,The two sides of flexible air-bag are individually fixed on housing,Opening is offered on flexible air-bag,Opening is connected with one end of tracheae,The other end of tracheae is connected for opening and with outside air,Tracheal strips slide axially along it and are provided with piston,Permanent magnet is provided on the outside of piston,Tracheal strips are provided with and the matched position sensor of permanent magnet,Circuit board is provided on the outside of tracheae,Circuit board is fixedly installed in the cavity of housing,Circuit board is mutually electrically connected with position sensor,Signal output line is also associated on circuit board,Signal output line stretches out housing,Insulating layer is provided on the inside of flexible air-bag.
Description
Technical field
The present invention relates to a kind of hydrostatic sensors.
Background technology
Hydrostatic sensor is the measurement parameter for measuring fluid, such as in washing machine, dish-washing machine, wet type or dry type air-breathing
Level measuring in device or in the component of other guiding water of housed device.The measuring device is in particular used for
The pressure sensor of low pressure (being, for example, less than 3500Pa (Pascal)).
Current hydrostatic sensor its with housing and being arranged in the diaphragm in housing and/or at housing.In the housing
In the presence of the elastic element for resetting diaphragm.Signal generator is in diaphragm and/or with elastic element in operation connection,
Signal receiver, to generate measuring signal, is had a drawback in that since diaphragm is usually with signal generator collective effect
Silica gel piece, diaphragm and elastic element have certain service life, when the elastic force of diaphragm and elastic element changes, letter
The distance that number generator moves under equal pressure is different, and then testing result is affected.
Invention content
It is an object of the invention to overcome defect in the prior art, a kind of hydrostatic sensor is provided, is measured accurate.
To achieve the above object, the technical scheme is that a kind of hydrostatic sensor is provided, including with cavity
Housing is connected to the measurement pipeline of the housing side along radially extending for the housing, the measurement pipeline and the shell
The cavity junction of body is provided with diaphragm, and the liquid effects entered from the measurement pipeline are in the lower section of the diaphragm, the film
Flexible air-bag is provided with above piece, the lower surface of the flexible air-bag is mutually fixedly connected with the upper surface of the diaphragm, described
The two sides of flexible air-bag are individually fixed on the housing, and opening, the opening connection are offered on the flexible air-bag
There is one end of tracheae, the other end of the tracheae is connected for opening and with outside air, and the tracheal strips slide axially along it
Piston is provided with, permanent magnet is provided on the outside of the piston, the tracheal strips are provided with and the matched position of the permanent magnet
Sensor is put, circuit board is provided on the outside of the tracheae, the circuit board is fixedly installed in the cavity of the housing, described
Circuit board is mutually electrically connected with the position sensor, and signal output line, the signal output are also associated on the circuit board
Line stretches out the housing, and insulating layer is provided on the inside of the flexible air-bag.
It is further improved to be：The diaphragm is made of silica gel.
It is further improved to be：The periphery of the piston offers several mounting grooves, is provided in the mounting groove O-shaped close
Seal.
It is further improved to be：The side of the housing is provided with Elastic buckle, and the end set for measuring pipeline has
With the matched fixture block of the Elastic buckle, there is pressure ring on the housing, offer indent on the fixture block, the pressure ring with
The indent, which matches, fixes the edge part of the diaphragm.
The advantages of the present invention are：By by traditional side by diaphragm shape changing detection permanent magnetism body position
Formula, using flexible air-bag, detection secondary piston keeps balancing in tracheal strips, after diaphragm is pressurized, to the gas in flexible air-bag into
Row compression pushes piston movement to look for the position balanced again under the influence of air pressure, and detects piston by position sensor
On permanent magnetism body position so as to detect current hydraulic pressure, due to changing permanent magnetism position using the variation of air pressure in the technical program
It puts and measures, and serviced without shrapnel, realized using the principle of tracheae inside and outside air pressure balance, so as to substantially reduce pair
Influence, substantially increases accuracy of detection caused by diaphragm and shrapnel performance.
Description of the drawings
Fig. 1 is schematic diagram of the present invention.
Wherein：1st, housing；2nd, pipeline is measured；3rd, diaphragm；4th, flexible air-bag；5th, tracheae；6th, piston；7th, permanent magnet；8th, position
Put sensor；9th, circuit board；10th, signal output line.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is further described.Following embodiment is only
For clearly illustrating technical scheme of the present invention, and it is not intended to limit the protection scope of the present invention and limits the scope of the invention.
As shown in Figure 1, a kind of hydrostatic sensor, including the housing 1 with cavity, radially extending along the housing 1
The measurement pipeline 2 of 1 side of housing is connected to, the cavity junction of the measurement pipeline 2 and the housing 1 is provided with diaphragm
3, for the liquid effects entered from the measurement pipeline 2 in the lower section of the diaphragm 3, the top of the diaphragm 3 is provided with flexible air
Capsule 4, the lower surface of the flexible air-bag 4 are mutually fixedly connected with the upper surface of the diaphragm 3, the two sides of the flexible air-bag 4
It being individually fixed on the housing 1, opening is offered on the flexible air-bag 4, the opening is connected with one end of tracheae 5,
The other end of the tracheae 5 is connected for opening and with outside air, slides axially in the tracheae 5 along it and is provided with piston 6,
The outside of the piston 6 is provided with permanent magnet 7, is provided in the tracheae 5 and the 7 matched position sensor of permanent magnet
8, the outside of the tracheae 5 is provided with circuit board 9, and the circuit board 9 is fixedly installed in the cavity of the housing 1, the electricity
Road plate 9 is electrically connected with 8 phase of position sensor, and signal output line 10 is also associated on the circuit board 9, and the signal is defeated
The housing 1 is stretched out in outlet 10, and the inside of the flexible air-bag 4 is provided with insulating layer.
Operation principle：The fluid of detection is flowed by measuring pipeline 2, is formed surge to diaphragm 3, is caused flexible air-bag
4 deformations, the air pressure after flexible air-bag 4 deforms in it rises, so that piston 6 moves the position for looking for inside and outside air pressure balance,
When reaching new equilbrium position, position sensor 8 detects the position of permanent magnet 7 on piston 6, and sends a signal to circuit board
9, it is finally exported by signal output line 10, so as to measure current hydraulic pressure, due to utilizing atmospheric pressure equilibrium principle, instead of existing skill
The flexible deformation of itself of diaphragm 3 is utilized in art, so as to reduce the dependence of the self performance to diaphragm 3 and shrapnel, not only
Service life is long and accuracy of detection is high, in addition by being provided with insulating layer, can prevent fluid temperature (F.T.) from being made to gas in air bag
It into influence, causes its air pressure unstable, after insulating layer is set, detects the fluid of different temperatures without carrying out school to hydrostatic sensor
Just.
Preferred embodiment is in the present embodiment, and the diaphragm 3 is made of silica gel.
In order to improve sealing effect, so as to improve the accuracy of detection of hydrostatic sensor, if the periphery of the piston 6 offers
Dry mounting groove is provided with O-ring seal in the mounting groove.
Pipeline 2 is measured in order to facilitate processing and installing, the side of the housing 1 is provided with Elastic buckle, the measurement
The end set of pipeline 2 have with the matched fixture block of the Elastic buckle, there is on the housing 1 pressure ring, opened on the fixture block
Equipped with indent, the pressure ring is matched with the indent fixes the edge part of the diaphragm 3.
Basic principle of the invention and main feature and its advantage has been shown and described above, the technical staff of the industry should
The understanding, the present invention is not limited to the above embodiments, the original for only illustrating the present invention described in above-described embodiment and explanation
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention, the claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (4)
1. a kind of hydrostatic sensor, it is characterised in that：Connection is radially extended including the housing with cavity, along the housing
Measurement pipeline in the housing side, the cavity junction for measuring pipeline and the housing are provided with diaphragm, from described
It measures the liquid effects that pipeline enters and flexible air-bag, the flexibility is provided with above the lower section of the diaphragm, the diaphragm
The lower surface of air bag is mutually fixedly connected with the upper surface of the diaphragm, and the two sides of the flexible air-bag are individually fixed in the shell
On body, opening is offered on the flexible air-bag, the opening is connected with one end of tracheae, and the other end of the tracheae is opens
Mouthful and be connected with outside air, the tracheal strips slide axially along it is provided with piston, is provided with forever on the outside of the piston
Magnet, the tracheal strips be provided with the matched position sensor of the permanent magnet, be provided with circuit on the outside of the tracheae
Plate, the circuit board are fixedly installed in the cavity of the housing, and the circuit board is mutually electrically connected with the position sensor,
Signal output line is also associated on the circuit board, the signal output line stretches out the housing, the inside of the flexible air-bag
It is provided with insulating layer.
2. hydrostatic sensor as described in claim 1, it is characterised in that：The diaphragm is made of silica gel.
3. hydrostatic sensor as described in claim 1, it is characterised in that：The periphery of the piston offers several mounting grooves,
O-ring seal is provided in the mounting groove.
4. hydrostatic sensor as described in claim 1, it is characterised in that：The side of the housing is provided with Elastic buckle, institute
State measure pipeline end set have with the matched fixture block of the Elastic buckle, there is on the housing pressure ring, the fixture block
On offer indent, the pressure ring matches with the indent and fixes the edge part of the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476929.1A CN108181039B (en) | 2017-12-29 | 2017-12-29 | Hydraulic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476929.1A CN108181039B (en) | 2017-12-29 | 2017-12-29 | Hydraulic sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181039A true CN108181039A (en) | 2018-06-19 |
| CN108181039B CN108181039B (en) | 2020-02-07 |
Family
ID=62548896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711476929.1A Active CN108181039B (en) | 2017-12-29 | 2017-12-29 | Hydraulic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108181039B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006503A (en) * | 2019-03-20 | 2019-07-12 | 安徽中科大国祯信息科技有限责任公司 | A new type of water level sensor |
| CN111118864A (en) * | 2018-10-30 | 2020-05-08 | 无锡小天鹅电器有限公司 | Liquid storage box for clothes treatment device and clothes treatment device |
| CN112504541A (en) * | 2020-11-25 | 2021-03-16 | 丁竹韵 | Piezoelectric pressure sensor |
| CN113309761A (en) * | 2021-06-22 | 2021-08-27 | 重庆工业职业技术学院 | Magnetism-gas position detection device |
| CN114593864A (en) * | 2022-03-09 | 2022-06-07 | 中国船舶重工集团公司第七0三研究所 | Hydraulic sensor for thermal power plant thermodynamic system |
| CN116447252A (en) * | 2023-05-15 | 2023-07-18 | 温州力邦企业有限公司 | Hydraulic disc type brake for motorcycle |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123748A (en) * | 1994-09-28 | 1996-06-05 | 大宇电子株式会社 | Airbag testing apparatus and a method therefor |
| US5677475A (en) * | 1995-07-26 | 1997-10-14 | Mitsubishi Denki Kabushiki Kaisha | Acceleration sensor impact test method and apparatus |
| US20040074281A1 (en) * | 2002-10-16 | 2004-04-22 | Lobdell Donn D. | Testing of pressure sensor in surgical cassette |
| US7004039B1 (en) * | 2004-02-17 | 2006-02-28 | The United States Of America As Represented By The Secretary Of The Navy | Ambient pressure compensated tactile sensor |
| CN201179260Y (en) * | 2008-04-15 | 2009-01-14 | 天津美迪斯医疗用品有限公司 | Air chamber pressure indicator |
| CN101788364A (en) * | 2010-01-29 | 2010-07-28 | 翟传伟 | Vacuum-degree detection device of vacuum thermal-insulation plate |
| EP2386719A2 (en) * | 2010-05-11 | 2011-11-16 | Sondex Wireline Limited | Pressure balancing device |
| CN103405825A (en) * | 2013-08-26 | 2013-11-27 | 苏州鼎诺医疗设备有限公司 | Transfusion pump |
| CN203422299U (en) * | 2013-09-13 | 2014-02-05 | 中铁第五勘察设计院集团有限公司 | Automatic ballonet volume tester |
| CN204479237U (en) * | 2015-03-10 | 2015-07-15 | 邹德伟 | The pressure indicator of adjustable balloon pressure |
| CN204783880U (en) * | 2015-07-03 | 2015-11-18 | 徐州工业职业技术学院 | Hydraulic accumulator with running state monitor function |
| CN105408151A (en) * | 2013-03-15 | 2016-03-16 | 储存能源解决方案公司 | Hydraulic hybrid system |
| CN105424273A (en) * | 2015-12-15 | 2016-03-23 | 河南工业大学 | Novel indoor earth pressure cell calibration tank |
| CN105699006A (en) * | 2015-09-15 | 2016-06-22 | 车惠英 | Dial plate type micropressure pressure indicator |
-
2017
- 2017-12-29 CN CN201711476929.1A patent/CN108181039B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123748A (en) * | 1994-09-28 | 1996-06-05 | 大宇电子株式会社 | Airbag testing apparatus and a method therefor |
| US5677475A (en) * | 1995-07-26 | 1997-10-14 | Mitsubishi Denki Kabushiki Kaisha | Acceleration sensor impact test method and apparatus |
| US20040074281A1 (en) * | 2002-10-16 | 2004-04-22 | Lobdell Donn D. | Testing of pressure sensor in surgical cassette |
| US7004039B1 (en) * | 2004-02-17 | 2006-02-28 | The United States Of America As Represented By The Secretary Of The Navy | Ambient pressure compensated tactile sensor |
| CN201179260Y (en) * | 2008-04-15 | 2009-01-14 | 天津美迪斯医疗用品有限公司 | Air chamber pressure indicator |
| CN101788364A (en) * | 2010-01-29 | 2010-07-28 | 翟传伟 | Vacuum-degree detection device of vacuum thermal-insulation plate |
| EP2386719A2 (en) * | 2010-05-11 | 2011-11-16 | Sondex Wireline Limited | Pressure balancing device |
| CN105408151A (en) * | 2013-03-15 | 2016-03-16 | 储存能源解决方案公司 | Hydraulic hybrid system |
| CN103405825A (en) * | 2013-08-26 | 2013-11-27 | 苏州鼎诺医疗设备有限公司 | Transfusion pump |
| CN203422299U (en) * | 2013-09-13 | 2014-02-05 | 中铁第五勘察设计院集团有限公司 | Automatic ballonet volume tester |
| CN204479237U (en) * | 2015-03-10 | 2015-07-15 | 邹德伟 | The pressure indicator of adjustable balloon pressure |
| CN204783880U (en) * | 2015-07-03 | 2015-11-18 | 徐州工业职业技术学院 | Hydraulic accumulator with running state monitor function |
| CN105699006A (en) * | 2015-09-15 | 2016-06-22 | 车惠英 | Dial plate type micropressure pressure indicator |
| CN105424273A (en) * | 2015-12-15 | 2016-03-23 | 河南工业大学 | Novel indoor earth pressure cell calibration tank |
Non-Patent Citations (1)
| Title |
|---|
| 杨天兴: "《液压传动与采掘机械》", 30 September 2014, 吉林大学出版社 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118864A (en) * | 2018-10-30 | 2020-05-08 | 无锡小天鹅电器有限公司 | Liquid storage box for clothes treatment device and clothes treatment device |
| CN111118864B (en) * | 2018-10-30 | 2022-04-22 | 无锡小天鹅电器有限公司 | Liquid storage box for clothes treatment device and clothes treatment device |
| CN110006503A (en) * | 2019-03-20 | 2019-07-12 | 安徽中科大国祯信息科技有限责任公司 | A new type of water level sensor |
| CN112504541A (en) * | 2020-11-25 | 2021-03-16 | 丁竹韵 | Piezoelectric pressure sensor |
| CN112504541B (en) * | 2020-11-25 | 2022-03-22 | 江苏惟哲新材料有限公司 | Piezoelectric pressure sensor |
| CN113309761A (en) * | 2021-06-22 | 2021-08-27 | 重庆工业职业技术学院 | Magnetism-gas position detection device |
| CN114593864A (en) * | 2022-03-09 | 2022-06-07 | 中国船舶重工集团公司第七0三研究所 | Hydraulic sensor for thermal power plant thermodynamic system |
| CN114593864B (en) * | 2022-03-09 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | Hydraulic sensor for thermal power plant thermodynamic system |
| CN116447252A (en) * | 2023-05-15 | 2023-07-18 | 温州力邦企业有限公司 | Hydraulic disc type brake for motorcycle |
| CN116447252B (en) * | 2023-05-15 | 2024-03-08 | 温州力邦企业有限公司 | Hydraulic disc type brake for motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108181039B (en) | 2020-02-07 |
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