CN108181039B - Hydraulic sensor - Google Patents
Hydraulic sensor Download PDFInfo
- Publication number
- CN108181039B CN108181039B CN201711476929.1A CN201711476929A CN108181039B CN 108181039 B CN108181039 B CN 108181039B CN 201711476929 A CN201711476929 A CN 201711476929A CN 108181039 B CN108181039 B CN 108181039B
- Authority
- CN
- China
- Prior art keywords
- shell
- diaphragm
- air bag
- flexible air
- air pipe
- 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.)
- Active
Links
Images
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
The invention provides a hydraulic sensor with long service life and high detection precision, which comprises a shell with a cavity and a measuring pipeline, wherein the measuring pipeline extends along the radial direction of the shell and is connected with one side of the shell, a diaphragm is arranged at the joint of the measuring pipeline and the cavity of the shell, liquid entering from the measuring pipeline acts on the lower part of the diaphragm, a flexible air bag is arranged above the diaphragm, the lower surface of the flexible air bag is fixedly connected with the upper surface of the diaphragm, two side surfaces of the flexible air bag are respectively fixed on the shell, an opening is arranged on the flexible air bag, one end of an air pipe is connected with the opening, the other end of the air pipe is an opening and is communicated with the outside air, a piston is arranged in the air pipe in a sliding way along the axial direction of the air pipe, a permanent magnet is arranged on the outer side of, the circuit board is electrically connected with the position sensor, a signal output line is further connected to the circuit board, the signal output line extends out of the shell, and a heat insulation layer is arranged on the inner side of the flexible air bag.
Description
Technical Field
The present invention relates to a hydraulic sensor.
Background
Hydraulic sensors are measurement parameters for measuring fluids, for example for water level measurement in washing machines, dishwashers, wet or dry air extractors or other water-conducting components of domestic appliances. The measuring device is in particular a pressure sensor for low pressures, i.e. for example less than 3500 Pa.
The present hydraulic sensors have a housing and a diaphragm arranged in and/or at the housing. An elastic element for restoring the membrane is present in the housing. The signal generator is in operative connection with the diaphragm and/or with the elastic element, and the signal receiver co-acts with the signal generator in order to generate a measurement signal, which has the drawback that since the diaphragm is usually a silicone sheet, the diaphragm and the elastic element have a certain service life, when the elastic force of the diaphragm and the elastic element changes, the distance traveled by the signal generator under the same pressure varies, and the detection result is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a hydraulic sensor which is accurate in measurement.
In order to achieve the above object, the technical solution of the present invention is to provide a hydraulic sensor, including a casing having a cavity, and a measuring pipe extending along a radial direction of the casing and connected to one side of the casing, wherein a diaphragm is disposed at a connection position of the measuring pipe and the cavity of the casing, a liquid entering from the measuring pipe acts on a lower side of the diaphragm, a flexible air bag is disposed above the diaphragm, a lower surface of the flexible air bag is fixedly connected to an upper surface of the diaphragm, two side surfaces of the flexible air bag are respectively fixed to the casing, an opening is disposed on the flexible air bag, one end of an air pipe is connected to the opening, the other end of the air pipe is open and is communicated with outside air, a piston is slidably disposed in the air pipe along an axial direction of the air pipe, a permanent magnet is disposed outside the piston, and a position sensor matched with the permanent magnet, the tracheal outside is provided with the circuit board, the circuit board fixed set up in the cavity of casing, the circuit board with position sensor looks electrical connection, still be connected with signal output line on the circuit board, signal output line stretches out the casing, the inboard of flexible gasbag is provided with the heat preservation.
The further improvement is that: the membrane is made of silica gel.
The further improvement is that: a plurality of mounting grooves are formed in the periphery of the piston, and O-shaped sealing rings are arranged in the mounting grooves.
The further improvement is that: one side of casing is provided with the elasticity buckle, the tip of measuring tube be provided with elasticity buckle matched with fixture block, the clamping ring has on the casing, the indent has been seted up on the fixture block, the clamping ring with the indent cooperatees will the edge part of diaphragm is fixed.
The invention has the advantages and beneficial effects that: through the mode that will tradition detects the permanent magnet position through diaphragm deformation, adopt flexible gasbag, the piston keeps balanced in the trachea before detecting, after the diaphragm pressurized, compress the gas in the flexible gasbag, promote the piston removal under the effect of atmospheric pressure and look for balanced position once more, thereby detect out current hydraulic pressure through the permanent magnet position on the position sensor detection piston, thereby change the permanent magnet position owing to utilizing the change of atmospheric pressure among this technical scheme and measure, and need not the shell fragment to serve, utilize the balanced principle of the inside and outside atmospheric pressure of trachea to realize, thereby greatly reduced is to the influence that diaphragm and shell fragment performance caused, the detection precision has been improved greatly.
Drawings
FIG. 1 is a schematic view of the present invention.
Wherein: 1. a housing; 2. measuring a pipeline; 3. a membrane; 4. a flexible bladder; 5. an air tube; 6. a piston; 7. a permanent magnet; 8. a position sensor; 9. a circuit board; 10. and a signal output line.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a hydraulic sensor includes a housing 1 having a cavity, and a measuring tube 2 extending along a radial direction of the housing 1 and connected to one side of the housing 1, a diaphragm 3 is disposed at a connection position of the measuring tube 2 and the cavity of the housing 1, a liquid entering from the measuring tube 2 acts on a lower side of the diaphragm 3, a flexible air bag 4 is disposed above the diaphragm 3, a lower surface of the flexible air bag 4 is fixedly connected to an upper surface of the diaphragm 3, two side surfaces of the flexible air bag 4 are respectively fixed to the housing 1, an opening is disposed on the flexible air bag 4, the opening is connected to one end of an air tube 5, the other end of the air tube 5 is open and is communicated with outside air, a piston 6 is disposed in the air tube 5 along an axial direction thereof, and a permanent magnet 7 is disposed outside the piston 6, be provided with in trachea 5 with 7 matched with position sensor 8 of permanent magnet, the outside of trachea 5 is provided with circuit board 9, circuit board 9 fixed set up in the cavity of casing 1, circuit board 9 with position sensor 8 looks electrical connection, still be connected with signal output line 10 on the circuit board 9, signal output line 10 stretches out casing 1, the inboard of flexible gasbag 4 is provided with the heat preservation.
The working principle is as follows: the detected fluid flows in through the measuring pipeline 2 to form impact pressure on the diaphragm 3, so that the flexible air bag 4 is deformed, the air pressure in the flexible air bag 4 is increased after the flexible air bag 4 is deformed, so that the piston 6 moves to find the position where the internal and external air pressures are balanced, when a new balance position is reached, the position sensor 8 detects the position of the permanent magnet 7 on the piston 6, and sends a signal to the circuit board 9, and is finally output by the signal output line 10, thereby measuring the current hydraulic pressure, because the air pressure balance principle is utilized, the elastic deformation of the membrane 3 in the prior art is replaced, thereby reduced the dependence to the self performance of diaphragm 3 and shell fragment, not only long service life detects the precision height moreover, through having set up the heat preservation in addition, can prevent that fluid temperature from causing the influence to gas in the gasbag, causes its atmospheric pressure unstability, sets up the heat preservation after, detects the fluid of different temperatures and need not to rectify hydraulic sensor.
In the preferred embodiment of the present invention, the membrane 3 is made of silicon.
In order to improve the sealing effect and improve the detection precision of the hydraulic sensor, a plurality of mounting grooves are formed in the periphery of the piston 6, and O-shaped sealing rings are arranged in the mounting grooves.
In order to facilitate processing and installation of the measuring pipeline 2, one side of the shell 1 is provided with an elastic buckle, the end part of the measuring pipeline 2 is provided with a clamping block matched with the elastic buckle, the shell 1 is provided with a pressing ring, the clamping block is provided with a pressing groove, and the pressing ring is matched with the pressing groove to fix the edge part of the diaphragm 3.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are included to illustrate the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (4)
1. A hydraulic sensor, characterized by: the device comprises a shell with a cavity and a measuring pipeline which extends along the radial direction of the shell and is connected with one side of the shell, wherein a diaphragm is arranged at the joint of the measuring pipeline and the cavity of the shell, liquid entering from the measuring pipeline acts on the lower part of the diaphragm, a flexible air bag is arranged above the diaphragm, the lower surface of the flexible air bag is fixedly connected with the upper surface of the diaphragm, two side surfaces of the flexible air bag are respectively fixed on the shell, an opening is arranged on the flexible air bag, the opening is connected with one end of an air pipe, the other end of the air pipe is an opening and is communicated with the outside air, a piston is arranged in the air pipe in an axial sliding manner, a permanent magnet is arranged on the outer side of the piston, a position sensor matched with the permanent magnet is arranged in the air pipe, and a, the circuit board is fixedly arranged in the cavity of the shell, the circuit board is electrically connected with the position sensor, a signal output line is further connected onto the circuit board, the signal output line extends out of the shell, and a heat insulation layer is arranged on the inner side of the flexible air bag.
2. The hydraulic sensor of claim 1, wherein: the membrane is made of silica gel.
3. The hydraulic sensor of claim 1, wherein: a plurality of mounting grooves are formed in the periphery of the piston, and O-shaped sealing rings are arranged in the mounting grooves.
4. The hydraulic sensor of claim 1, wherein: one side of casing is provided with the elasticity buckle, the tip of measuring tube be provided with elasticity buckle matched with fixture block, the clamping ring has on the casing, the indent has been seted up on the fixture block, the clamping ring with the indent cooperatees will the edge part of diaphragm is fixed.
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 CN108181039A (en) | 2018-06-19 |
| CN108181039B true 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) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 kind of novel water level sensor |
| CN112504541B (en) * | 2020-11-25 | 2022-03-22 | 江苏惟哲新材料有限公司 | Piezoelectric pressure sensor |
| CN113309761B (en) * | 2021-06-22 | 2022-09-13 | 重庆工业职业技术学院 | Magnetism-gas position detection device |
| 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 |
| CN116447252B (en) * | 2023-05-15 | 2024-03-08 | 温州力邦企业有限公司 | Hydraulic disc type brake for motorcycle |
Citations (6)
| 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 |
| 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 |
| 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 |
| 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 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6868720B2 (en) * | 2002-10-16 | 2005-03-22 | Alcon, Inc. | Testing of pressure sensor in surgical cassette |
| 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 |
| CN101788364B (en) * | 2010-01-29 | 2011-07-27 | 青岛科瑞新型环保材料有限公司 | Vacuum-degree detection device of vacuum thermal-insulation plate |
| GB201007811D0 (en) * | 2010-05-11 | 2010-06-23 | Sondex Wireline Ltd | Pressure balancing device |
| MX2015013076A (en) * | 2013-03-15 | 2016-08-03 | Stored Energy Solutions Inc | Hydraulic hybrid system. |
| CN204479237U (en) * | 2015-03-10 | 2015-07-15 | 邹德伟 | The pressure indicator of adjustable balloon pressure |
| CN105699006B (en) * | 2015-09-15 | 2018-04-03 | 亚美斯特（天津）医疗器械有限公司 | A kind of dial type minute-pressure pressure indicator |
| CN105424273A (en) * | 2015-12-15 | 2016-03-23 | 河南工业大学 | Novel indoor earth pressure cell calibration tank |
-
2017
- 2017-12-29 CN CN201711476929.1A patent/CN108181039B/en active Active
Patent Citations (6)
| 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 |
| 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 |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108181039A (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108181039B (en) | Hydraulic sensor | |
| CN107941405B (en) | Hydraulic sensor and correction method thereof | |
| CN202141554U (en) | Ceramic structure metal sensitive diaphragm capacitance pressure transducer | |
| CN114323363B (en) | Capacitance type vacuum pressure sensor | |
| CN204064520U (en) | A kind of ratio-voltage pressure sensor output | |
| US20150185097A1 (en) | Diaphragm pressure gauge | |
| CN103968992A (en) | Pressure sensing device and pressure cooker with device | |
| CN201196595Y (en) | Integral high temperature pressure medium measuring apparatus | |
| CN103148974A (en) | Pressure sensing device applied in high-voltage environment | |
| CN204241068U (en) | Condenser type Multiple Liquid Level Instrument | |
| CN106164363B (en) | Pressure sensor with the air trap included | |
| CN202916035U (en) | Water pressure detection device based on ceramic pressure sensor | |
| CN110243530A (en) | A kind of novel pressure sensor | |
| CN101097166A (en) | Insulation type IC pressure sensing device | |
| CN210834018U (en) | Sealing ring and sealing leakage detection equipment | |
| CN204535913U (en) | High stability monocrystalline silicon differential pressure pickup | |
| CN201344807Y (en) | Vortex flowmeter capable of replacing probe without stopping flow | |
| CN104089978A (en) | Built-in detection system for sulfur hexafluoride gas humidity | |
| CN218974392U (en) | Oil flow detection sensor | |
| CN205426952U (en) | Mercury acceleration sensor | |
| CN221706812U (en) | Diaphragm sealing type pressure transmitter | |
| CN110146197B (en) | Pressure gauge device with temperature sensor | |
| CN206038165U (en) | Bayonet NTC temperature sensing device | |
| CN219511711U (en) | Novel magneto-electric pressure sensor | |
| CN204924544U (en) | High temperature melt pressure transducers that no medium was filled |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |