CN209559389U - Water pressure sensor - Google Patents
Water pressure sensor Download PDFInfo
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- CN209559389U CN209559389U CN201920212817.3U CN201920212817U CN209559389U CN 209559389 U CN209559389 U CN 209559389U CN 201920212817 U CN201920212817 U CN 201920212817U CN 209559389 U CN209559389 U CN 209559389U
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- pressure sensor
- water
- hydraulic pressure
- fixing end
- cavity
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims description 32
- 238000012360 testing method Methods 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000008014 freezing Effects 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement 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
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 resistance Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a water pressure sensor relates to pressure sensor technical field. The main purpose is to provide a water pressure sensor which can improve the problem that water in the sensor can not be discharged. The method comprises the following steps: a base and a pressure-sensitive element; the base body comprises a detection end used for contacting with a water body to be detected and a fixed end used for being installed with a waterway system; the detection end is internally provided with a cavity, the pressure sensing element is fixedly connected with the inner wall of the cavity, and the pressure sensing element is positioned at one end, far away from the fixed end, of the cavity; one side of the pressure sensing element far away from the fixed end and the end part of the detection end form a pressure taking opening. Because the pressure sensing element directly set up in one tip of base member can be direct and the water contact, and need not to flow water into the inside cavity of water pressure sensor again, consequently, improved the remaining moisture's of the inside cavity of water pressure sensor problem, avoid under the low temperature environment that the freezing of residual water is to the damage of pressure sensing element.
Description
Technical field
The utility model relates to pressure sensor technique fields, in particular to a kind of hydraulic pressure sensor.
Background technique
Pressure sensor is the important technology of modern surveying and automated system, is widely used in various industrial automatic control rings
Border is related to the industries such as water conservancy and hydropower, railway traffic, intelligent building, production automatic control, aerospace.Pressure sensor can experience pressure
Force signal, and pressure signal can be converted into the device or device of the electric signal of available output according to certain rule.Hydraulic pressure
Sensor is a kind of pressure sensor for measuring hydraulic pressure in water circuit system.
Existing hydraulic pressure sensor form are as follows: pressure sensor inside is arranged to cavity, and pressure element setting is to be measured in bottom
The water of amount position pressure need to be introduced into the cavity of sensor internal, act on the pressure-sensitive ceramic diaphragm of pressure sensor.
When water circuit system drains, easily residual moisture can not be discharged the hydraulic pressure sensor of such structure in the cavity, once use environment temperature
Degree is lower than zero degree, and icing is just freezed ceramic diaphragm by residual water, and pressure sensor can not normal work by failure before ice-out
Make, or even directly by ceramic diaphragm bursting by freezing.
Utility model content
It cannot exclude to solve the water of sensor internal in the prior art, make the skill to fail under ceramic diaphragm cryogenic conditions
Art problem, the main purpose of the utility model is that, a kind of hydraulic pressure improving the problem of sensor internal water cannot exclude is provided
Sensor.
The utility model embodiment provides a kind of hydraulic pressure sensor, comprising: matrix and pressure element；
Described matrix includes the test side for contacting with water body to be measured and the fixing end for installing with water circuit system；
There is cavity, the pressure element is fixedly connected with the inner wall of the cavity, and the sense inside the test side
Pressure element is located at one end on the cavity far from the fixing end；Side and institute of the pressure element far from the fixing end
The end for stating test side forms pressure tappings.
Further, in one preferred embodiment of the utility model, the pressure element is ceramic diaphragm, the pottery
Porcelain diaphragm includes sensitive surface and the back side, and the sensitive surface of the ceramic diaphragm is towards water body to be measured, the back side court of the ceramic diaphragm
To the fixing end.
Further, in one preferred embodiment of the utility model, the detection circuit of the pressure element is thick film
Circuit.
Further, in one preferred embodiment of the utility model, the thick film circuit is set to the ceramic membrane
The back side of piece.
Further, in one preferred embodiment of the utility model, the test side and the fixing end are cylinder
Body, the pressure element are circle.
Further, in one preferred embodiment of the utility model, the water circuit system is provided with mounting hole, described
Fixing end is removably connected at the mounting hole.
Further, in one preferred embodiment of the utility model, the fixing end is threadedly connected to the installation
At hole, and gasket is provided between the fixing end and the mounting hole.
Further, in one preferred embodiment of the utility model, the fixing end is fixed by snap in described
At mounting hole, and O-shaped gasket is provided between the fixing end and the mounting hole.
Further, in one preferred embodiment of the utility model, horizontal plane where the pressure element is relatively high
Horizontal plane where the end face of the mounting hole.
A kind of hydraulic pressure sensor provided by the utility model installs hydraulic pressure sensor by the fixing end of setting
In water circuit system, the test side is for detecting water body to be measured.Wherein, by the way that the pressure element to be set in the cavity
One end far from the fixing end so that after hydraulic pressure sensor is installed on water circuit system, the pressure element can directly with
Water body contact to be measured.Under the pressure effect of water body to be measured, micro-displacement occurs for the pressure element, and detection circuit is able to detect micro-
It is displaced and is converted into canonical measure signal and be transmitted to peripheral control unit, measure hydraulic pressure.Since the pressure element is directly arranged at
One end of described matrix, can directly contact with water body, without water to be drained to the inner chamber into hydraulic pressure sensor again
Body, therefore, the problem of improving hydraulic pressure sensor internal cavity residual moisture, avoids under low temperature environment remaining water freezing to described
The damage of pressure element.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the hydraulic pressure sensor that an embodiment of the present invention provides；
Fig. 2 is the main view for the hydraulic pressure sensor that an embodiment of the present invention provides；
Fig. 3 is the cross-sectional view for the hydraulic pressure sensor that an embodiment of the present invention provides.
Appended drawing reference:
1 matrix, 11 test side, 12 fixing end, 13 cavity, 2 ceramic diaphragm, 3 pressure tappings
Specific embodiment
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the application embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
As shown in Figure 1-3, the hydraulic pressure sensor that an embodiment of the present invention provides, comprising: matrix 1 and pressure element；
Described matrix 1 includes the test side 11 for contacting with water body to be measured and the fixing end for installing with water circuit system 12；Institute
Stating has cavity 13 inside test side 11, the pressure element is fixedly connected with the inner wall of the cavity 13, and pressure-sensitive member
Part is located at one end on the cavity 13 far from the fixing end 12；Side of the pressure element far from the fixing end 12 with
The end of the test side 11 forms pressure tappings 3.Hydraulic pressure sensor is made to be installed on water route by the fixing end 12 of setting
System, the test side 11 is for detecting water body to be measured.Wherein, by the way that the pressure element to be set in the cavity 13 far
One end from the fixing end 12 so that after hydraulic pressure sensor is installed on water circuit system, the pressure element can directly with
Water body contact to be measured.Under the pressure effect of water body to be measured, micro-displacement occurs for the pressure element, and detection circuit is able to detect micro-
It is displaced and is converted into canonical measure signal and be transmitted to peripheral control unit, measure hydraulic pressure.Since the pressure element is directly arranged at
One end of described matrix 1, can directly contact with water body, without water to be drained to the inner chamber into hydraulic pressure sensor again
Body, therefore, the problem of improving hydraulic pressure sensor internal cavity residual moisture, avoids under low temperature environment remaining water freezing to described
The damage of pressure element.
As Figure 2-3, the inside of hydraulic pressure sensor provided by the embodiment of the utility model, hydraulic pressure sensor is no longer arranged
For storage chamber, inner cavity is not contacted with water, and the ways of measure pressure for the hydraulic pressure sensor that the present embodiment is related to does not need to draw hydraulic pressure
To hydraulic pressure sensor internal cavity, but the hydraulic pressure in water circuit system is directly measured by pressure element.And in the present embodiment
The position that hydraulic pressure sensor can be made to contact with water is the end of test side 11, and pressure element is the main portion for contacting water
Part is more convenient for realizing being embedded into water pressure sensor and be detected inside water route, saves installation space.The application is based on pressure element
Mounting means form pressure tappings 3 in the end of matrix 1, the depth of pressure tappings 3 provided in this embodiment is much smaller than existing skill
The problem of 3 depth of pressure tappings in art, water body flow path is also small, effectively improves hydraulic pressure sensor water storage, to avoid water
Pressure sensor inner cavity freezes the problem of causing pressure element to fail.In addition, hydraulic pressure sensor provided by the embodiment of the utility model,
Due to being not required to diversion to sensor inner cavity, sensor internal space is saved, the volume of entire hydraulic pressure sensor can be reduced.
In the hydraulic pressure sensor that an embodiment of the present invention provides, the pressure element is ceramic diaphragm 2, the ceramics
Diaphragm 2 includes sensitive surface and the back side, and the sensitive surface of the ceramic diaphragm 2 guarantees accuracy of measurement towards water body to be measured；The pottery
The back side of porcelain diaphragm 2 guarantees that ceramic diaphragm 2 can complete deformation in cavity 13 towards the fixing end 12.Matrix 1 is ceramic base
Body 1, ceramic diaphragm 2 and the inner wall of cavity 13 are sintered to fix by glass paste.
Wherein, the pressure element is connect with detection circuit, and the detection circuit of pressure element is connect with peripheral control unit.Institute
Stating detection circuit is thick film circuit, and thick film circuit refers on same substrate using battle array membrane process (silk screen process, sintering and plating
Deng) production passive network and group load onto discrete semiconductor device, monolithic integrated optical circuit or micro element and the integrated electricity that constitutes
Road.It has been generally acknowledged that with a thickness of several microns to tens microns film be thick film, make thick film material be conductor, resistance, medium, absolutely
Five kinds of slurries such as edge and encapsulating.Ceramic diaphragm 2 in the presence of hydraulic pressure can deformation occurs, formed micro-displacement, thick film circuit can
It detects ceramic diaphragm 2 and the signal of micro-displacement occurs, and microbit shifting signal is converted into corresponding canonical measure signal, be transferred to outer
Portion's controller realizes the measurement of hydraulic pressure.Thick film circuit includes Wheatstone bridge, and Wheatstone bridge includes varistor R1, pressure-sensitive
Resistance R2, varistor R3 and varistor R4.
In addition, in order to ensure sealed reliable between pressure tappings 3 and ceramic diaphragm 2, need to use weather-resistant glue to ceramic diaphragm 2 into
Row is further hermetically sealed, and since the temperature difference range of use environment is big, therefore weather-resistant glue need to meet low temperature and high temperature invariance is reliable
It is required that.
In the present embodiment, the thick film circuit is set to the back side of the ceramic diaphragm 2, i.e. thick film circuit is located at matrix 1
Internal cavity in, allow to not by influence on water body.
In the hydraulic pressure sensor provided for the contact area for increasing ceramic diaphragm 2 and water, an embodiment of the present invention, institute
It states test side 11 and the fixing end 12 is cylindrical body, the ceramic diaphragm 2 is circle, and circular ceramic diaphragm 2 is realized and water
Contact area is sufficiently large.
In order to ensure that hydraulic pressure sensor is installed to the reliability in water circuit system, the water that an embodiment of the present invention provides
In pressure sensor, the water circuit system is provided with mounting hole, and the fixing end 12 is removably connected at the mounting hole.Specifically
, fixing end 12 described in the present embodiment is threadedly connected at the mounting hole, and the fixing end 12 and the mounting hole it
Between be provided with gasket.In another embodiment, the fixing end 12 is fixed by snap at the mounting hole, and the fixation
O-shaped gasket is provided between end 12 and the mounting hole.Two ways can make in hydraulic pressure sensor and water circuit system
Pipeline realizes hermetically sealed, guarantee sealing performance when installing.
During the installation process, not remaining for installing the installation hole location of hydraulic pressure sensor itself in water circuit system in order to ensure
Moisture, in the hydraulic pressure sensor that an embodiment of the present invention provides, the 2 place horizontal plane of ceramic diaphragm is relatively higher than described
Horizontal plane namely 2 place horizontal plane of ceramic diaphragm where the end face of mounting hole more connect compared with the horizontal plane where installation hole end surface
It is bordering on main waterway, conversely, the horizontal plane where installation hole end surface is compared with where 2 place horizontal plane of ceramic diaphragm closer to mounting hole
Pipeline or valve body.Water route unreasonable structure itself is avoided to influence the effect of hydraulic pressure sensor, this water pressure sensor is also as a result,
The unreasonable of waterway structure can be made up to a certain degree.
In conclusion hydraulic pressure sensor provided by the embodiment of the utility model, not with the structure of traditional water pressure sensor
Together, contact hydraulic pressure sensor inner cavity with water, but the ceramic diaphragm 2 by being located at end is directly contacted with water；To change
Kind sensor inner cavity residual moisture in water circuit system drainage procedure, hydraulic pressure sensor is in low temperature environment after further preventing draining
Middle icing failure；The adaptive capacity to environment of hydraulic pressure sensor is improved, the unfailing performance for using the hydraulic pressure sensor unit is promoted.
In the description of the present invention, it should be understood that term " on ", "lower", "vertical", "horizontal", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " be orientation based on the figure or
Corresponding orientation when positional relationship namely air-conditioning normal mounting.It is merely for convenience of describing the present invention and simplifying the description, and
It is not that the equipment of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore
It should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Above description is merely a prefered embodiment of the utility model, is not intended to limit the utility model, for
For those skilled in the art, various modifications and changes may be made to the present invention.All spirit and original in the utility model
Within then, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of hydraulic pressure sensor characterized by comprising matrix (1) and pressure element；
Described matrix (1) includes the test side (11) for contacting with water body to be measured and the fixation for installing with water circuit system
It holds (12)；
There are cavity (13) inside the test side (11), the pressure element is fixedly connected with the inner wall of the cavity (13),
And the pressure element is located at one end on the cavity (13) far from the fixing end (12)；The pressure element is far from described
The side of fixing end (12) and the end of the test side (11) form pressure tappings (3).
2. hydraulic pressure sensor according to claim 1, which is characterized in that the pressure element is ceramic diaphragm (2), described
Ceramic diaphragm (2) includes sensitive surface and the back side, and the sensitive surface of the ceramic diaphragm (2) is towards water body to be measured, the ceramic diaphragm
(2) the back side is towards the fixing end (12).
3. hydraulic pressure sensor according to claim 2, which is characterized in that the detection circuit of the pressure element is thick film electricity
Road.
4. hydraulic pressure sensor according to claim 3, which is characterized in that the thick film circuit is set to the ceramic diaphragm
(2) the back side.
5. hydraulic pressure sensor according to claim 1, which is characterized in that the test side (11) and the fixing end (12)
For cylindrical body, the pressure element is circle.
6. hydraulic pressure sensor according to claim 1, which is characterized in that the water circuit system is provided with mounting hole, described
Fixing end (12) is removably connected at the mounting hole.
7. hydraulic pressure sensor according to claim 6, which is characterized in that the fixing end (12) is threadedly connected to the peace
It fills at hole, and is provided with gasket between the fixing end (12) and the mounting hole.
8. hydraulic pressure sensor according to claim 6, which is characterized in that the fixing end (12) is fixed by snap in institute
It states at mounting hole, and is provided with O-shaped gasket between the fixing end (12) and the mounting hole.
9. according to any one of the claim 6-8 hydraulic pressure sensor, which is characterized in that horizontal plane phase where the pressure element
To the horizontal plane where the end face for being higher than the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212817.3U CN209559389U (en) | 2019-02-18 | 2019-02-18 | Water pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212817.3U CN209559389U (en) | 2019-02-18 | 2019-02-18 | Water pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209559389U true CN209559389U (en) | 2019-10-29 |
Family
ID=68309208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920212817.3U Active CN209559389U (en) | 2019-02-18 | 2019-02-18 | Water pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209559389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827701A (en) * | 2019-02-18 | 2019-05-31 | 珠海格力电器股份有限公司 | Water pressure sensor |
-
2019
- 2019-02-18 CN CN201920212817.3U patent/CN209559389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827701A (en) * | 2019-02-18 | 2019-05-31 | 珠海格力电器股份有限公司 | Water pressure sensor |
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