CN207570715U - Pressure sensor and with its pressure cooker - Google Patents
Pressure sensor and with its pressure cooker Download PDFInfo
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- CN207570715U CN207570715U CN201721548547.0U CN201721548547U CN207570715U CN 207570715 U CN207570715 U CN 207570715U CN 201721548547 U CN201721548547 U CN 201721548547U CN 207570715 U CN207570715 U CN 207570715U
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- pressure
- inductance
- pressure sensor
- induction coil
- magnetic core
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Abstract
The utility model discloses a kind of pressure sensor and there is its pressure cooker, pressure sensor includes：Magnetic field shielding ring, magnetic core, induction coil, inductance phasor measurement unit and main control unit, magnetic core is located in magnetic field shielding ring, magnetic core is moved with the variation of testing pressure, induction coil is located in magnetic field shielding ring, the inductance value of induction coil changes the variation of the position of magnetic core, inductance phasor measurement unit is used to detect the inductance value changing value of induction coil, inductance phasor measurement unit is connected with induction coil, main control unit is communicated with inductance phasor measurement unit, and main control unit obtains the current pressure values of testing pressure according to the inductance value changing value of induction coil.According to the pressure sensor of the utility model, the detection range of pressure sensor is not only widened, it can also prevent magnetic field or electric field in pressure sensor external environment from influencing the magnetic flux of induction coil, and then improve the pressure measurement precision of pressure sensor, improve the antijamming capability of pressure sensor.
Description
Technical field
The utility model is related to pressure cooker technical fields, and in particular, to a kind of pressure sensor and with its pressure
Pot.
Background technology
Pressure sensor in the relevant technologies, is easily interfered in use by external environment, in particular by
Inductance value variable quantity obtains the pressure sensor of testing pressure, by can be influenced by external magnetic field or electric field, not only influences
The measurement accuracy of pressure sensor is also easy to cause stress the damage of magnetic element or the change in magnetic field in sensor, influences to press
The service life of force snesor.
Utility model content
The utility model is intended at least solve one of technical problem in the prior art.
For this purpose, the utility model proposes a kind of pressure sensor, the pressure sensor can eliminate external environment to pressure
The interference of power Chang'an device is conducive to the accuracy of detection of adherence pressure sensor.
The utility model also proposes a kind of pressure cooker with above-mentioned pressure sensor.
According to the pressure sensor of the utility model first aspect, including：Magnetic field shielding ring, magnetic core, induction coil, inductance
Phasor measurement unit and main control unit, the magnetic core are located in the magnetic field shielding ring, the magnetic core with the variation of testing pressure and
Mobile, the induction coil is located in the magnetic field shielding ring, and the inductance value of the induction coil is to the position of the magnetic core
Variation and change, the inductance phasor measurement unit is used to detect the inductance value changing value of the induction coil, the inductance value
Measuring unit is connected with the induction coil, and the main control unit is communicated with the inductance phasor measurement unit, the main control unit
The current pressure values of the testing pressure are obtained according to the inductance value changing value of the induction coil.
According to the pressure sensor of the utility model, the position of inductance phasor measurement unit and induction coil cooperation detection magnetic core is utilized
It puts, main control unit is according to the pressure condition in the position acquisition cooking cavity of magnetic core, on the one hand, main control unit under different pressures state
It is different to obtain feedback signal, the testing pressure in a pressure limit can be adjusted the work shape of pressure cooker in main control unit
State, compared with the pressure switch of i.e. disconnected formula is opened in the relevant technologies, main control unit can be the pressure cooker under different cooking status
Feedback information has not only widened the detection range of pressure sensor, moreover it is possible to increase the cooking function of pressure cooker, on the other hand, lead to
Setting magnetic field shielding ring in pressure sensor is crossed, prevents magnetic field or electric field in pressure sensor external environment from influencing the line of induction
The magnetic flux of circle, and then the pressure measurement precision of pressure sensor is improved, improve the antijamming capability of pressure sensor.
According to the pressure sensor of the use of the new type one embodiment, further include：Shell, the shell are located at the magnetic field
In shading ring, the shell has inner cavity, and the magnetic core is located at the interior intracavitary, the inner cavity positioned at the side of the magnetic core
Part connected with the testing pressure, the part of the opposite side positioned at the magnetic core of the inner cavity and atmosphere.
Optionally, the shell includes：Pedestal and movable cover plate, the pedestal is located in the magnetic field shielding ring, described
Inner cavity is formed on the pedestal and the pedestal is equipped with testing pressure entrance in communication with the inner cavity, the movable cover plate
It is movably arranged on the pedestal, the magnetic core is located on the movable cover plate.
Further, the magnetic core is located at the surface of the direction testing pressure entrance of the movable cover plate.
One embodiment according to the present utility model, the magnetic field shielding ring and the shell integrated injection molding.
According to the pressure sensor of the use of the new type one embodiment, the magnetic field shielding ring is FERRITE CORE, aluminum
Part or copper fitting.
According to the pressure sensor of the use of the new type one embodiment, further include：With the storage of main control unit communication
Module, the memory module store the mapping table of difference in inductance and pressure, and the main control unit is by the induction coil
Inductance value changing value substitutes into the difference in inductance in the mapping table of the difference in inductance and pressure, and obtains institute according to corresponding pressure
State the current pressure values of testing pressure.
Optionally, the inductance value changing value of the induction coil for the induction coil current inductance value with it is described to be measured
Pressure corresponds to the difference of the inductance value of the induction coil when being atmospheric pressure.
Further, the mapping table of the difference in inductance and pressure is obtained by demarcating in advance.
According to the pressure cooker of the utility model second aspect, including the pressure sensor according to above-described embodiment.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the fundamental diagram according to the pressure sensor of the utility model embodiment；
Fig. 2 is the structure diagram according to the pressure sensor of the utility model embodiment.
Reference numeral：
100：Pressure sensor；
10：Magnetic field shielding ring；20：Magnetic core；30：Main control unit；40：Shell；41：Pedestal；
411：Testing pressure entrance；42：Movable cover plate；43：Inner cavity；431：First point of chamber；
432：Second point of chamber；50：Induction coil；60：Inductance phasor measurement unit.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, it is to be appreciated that term " length ", " thickness ", " on ", " under ", " preceding ",
The orientation of the instructions such as " rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " radial direction ", " circumferential direction " or position are closed
Be for based on orientation shown in the drawings or position relationship, be for only for ease of description the utility model and simplify description rather than
Indicate or imply that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot
It is construed as a limitation of the present invention.In addition, define " first ", the feature of " second " can be expressed or implicitly include
One or more this feature.In the description of the present invention, unless otherwise indicated, " multiple " are meant that two or two
More than a.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection；Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, can above-mentioned art be understood with concrete condition
Concrete meaning of the language in the utility model.
Below with reference to Fig. 1-Fig. 2 descriptions according to the pressure cooker of the utility model embodiment.
As illustrated in fig. 1 and 2, a specific embodiment according to the present utility model, pressure cooker include：Pot (not shown),
Cover (not shown) and pressure sensor 100, pot is interior to be equipped with pot, limits the open cooking cavity in upper surface in pot, cover can
It is pivotally connected in pot to open or close cooking cavity, pressure sensor 100 is located between pot and pot, pressure sensor
100 can detect the pressure in cooking cavity, and pressure signal is transferred to pot, and pot is fed back according to pressure sensor 100
The working condition of pressure information control pressure pot.
First, the pressure sensor 100 according to the utility model embodiment is described in detail with reference to the accompanying drawing figures.
As shown in the figure, pressure sensor 100 according to the present utility model, including：Magnetic field shielding ring 10, magnetic core 20, sensing
Coil 50, inductance phasor measurement unit 60 and main control unit 30.
Installation cavity is limited in magnetic field shielding ring 10, magnetic core 20 and induction coil 50 are located in installation cavity, induction coil 50
In the magnetic field of magnetic core 20, and magnetic core 20 is moved with the variation of testing pressure in installation cavity, during magnetic core 20 changes,
The magnetic field that magnetic core 20 generates also changes, and the intensity and quantity across the magnetic induction line of induction coil 50 change, the line of induction
The magnetic flux of circle 50 changes accordingly, and then, the inductance value of induction coil 50 occurs with the variation of the position of magnetic core 20
Corresponding variation.
Wherein, inductance phasor measurement unit 60 is connected with induction coil 50, for detecting the variation of the inductance value of induction coil 50
Value, main control unit 30 are communicated with inductance phasor measurement unit 60, and main control unit 30 detects the line of induction by inductance phasor measurement unit 60
The changing value of 50 inductance value is enclosed so as to obtain the location information of magnetic core 20, and then to be measured by the location information acquisition of magnetic core 20
The pressure value of pressure area.
Pressure sensor 100 according to the present utility model as a result, utilizes inductance phasor measurement unit 60 and induction coil 50
The position of cooperation detection magnetic core 20, main control unit 30 is according to the pressure condition in the position acquisition cooking cavity of magnetic core 20, on the one hand,
Main control unit 30 obtains feedback signal difference under different pressures state, and main control unit 30 can be to be measured in a pressure limit
The working condition of pressure cooker is adjusted in pressure, compared with the pressure switch of i.e. disconnected formula is opened in the relevant technologies, main control unit 30
It can be the pressure cooker feedback information under different cooking status, not only widen the detection range of pressure sensor 100, moreover it is possible to
Increase the cooking function of pressure cooker, on the other hand, by setting magnetic field shielding ring 10 in pressure sensor 100, prevent pressure
Magnetic field or electric field in 100 external environment of sensor influence the magnetic flux of induction coil 50, and then improve pressure sensor 100
Pressure measurement precision improves the antijamming capability of pressure sensor 100.
According to the pressure cooker of the utility model embodiment, by using the pressure sensor 100 of above-described embodiment, not only may be used
It to adjust the working condition of pressure cooker according to the pressure condition in cooking cavity, is provided a convenient for user's cooked food, moreover it is possible to anti-
Only surrounding magnetic field influences the cooking function of pressure cooker with electric field.
Some specific embodiments of pressure sensor 100 according to the utility model embodiment are described with reference to the accompanying drawings.
As shown in Fig. 2, according to one embodiment of present invention, pressure sensor 100 further includes：Shell 40, shell 40 are set
In magnetic field shielding ring 10, inner cavity 43 is defined in shell 40, magnetic core 20 is located in inner cavity 43 and divides inner cavity 43 at interval
The first point of chamber 431 and second point of chamber 432 of arrangement are opened, first point of chamber 431 connects testing pressure area, and second point of chamber 432 connects greatly
Gas, when the pressure increase in testing pressure area, the volume of first point of chamber 431 increases accordingly, and magnetic core 20 holds with first point of chamber 431
Long-pending increase generates displacement accordingly, and when the pressure in testing pressure area reduces, the volume of inner cavity 43 reduces accordingly, magnetic core 20
Displacement is generated accordingly with the reduction of first point of 431 volume of chamber.
During magnetic core 20 is moved with first point of being easily varied for chamber 431, phase occurs for the inductance value of induction coil 50
The variation answered, the inductance value changing value for the induction coil 50 that main control unit 30 is measured by inductance phasor measurement unit 60, is thus obtained
The situation of movement of magnetic core 20 is taken, the volume situation of change of first point of chamber 431 is obtained according to the situation of movement of magnetic core 20, and then obtain
The pressure value of testing pressure.
By setting shell 40, the mobile route that inner cavity 43 controls magnetic core 20 on the one hand can be limited, prevents magnetic core 20
It is arbitrarily mobile, be conducive to the precision of adherence pressure sensor 100, on the other hand, shell 40 can protect magnetic core 20 and the line of induction
It encloses 50 free from the influence of the external environment, is conducive to the service life of adherence pressure sensor 100, and can be pressure sensor
100 installation provides conveniently with using.
As shown in Fig. 2, in the present embodiment, shell 40 includes：Pedestal 41 and movable cover plate 42, pedestal 41 are located at magnetic field screen
It covers in ring 10, inner cavity 43 is limited in pedestal 41, the wall surface of pedestal 41 is equipped with the testing pressure entrance connected with inner cavity 43
411, and testing pressure entrance 411 connects first point of chamber 431, movable cover plate 42 is movably arranged on pedestal 41, movable cover plate
42 can be located in inner cavity 43, and along the axial movement of inner cavity 43, and sealing is matched between movable cover plate 42 and the side wall of inner cavity 43
Close, magnetic core 20 is located on movable cover plate 42, wherein, first point of chamber 431 be located at movable cover plate 42 and testing pressure entrance 411 it
Between, second point of chamber 432 is located at movable cover plate 42 back to the side of testing pressure entrance 411.
When with the increase of testing pressure, the pressure in first point of chamber 431 increases, and movable cover plate 42 is directed away from treating pressure measurement
The direction movement of power entrance 411, magnetic core 20 generates corresponding displacement, when with the reduction of testing pressure, in first point of chamber 431
Pressure reduce, for movable cover plate 42 towards close to the movement of the direction of testing pressure entrance 411, magnetic core 20 generates corresponding displacement.
Using the change in location of pedestal 41 and the cooperation control magnetic core 20 of movable cover plate 42, and according to the position acquisition of magnetic core 20
The situation of testing pressure, it is simple in structure, it is easy to implement, and the activity high sensitivity of movable cover plate 42, be conducive to adherence pressure
The precision of sensor 100.
Further, in the present embodiment, magnetic core 20 is located at the surface towards testing pressure entrance 411 of movable cover plate 42
Magnetic core 20 is located at by lower surface as depicted, movable cover plate 42 back to the side of testing pressure entrance 411 and atmosphere
Movable cover plate 42 can prevent the subversive gas in air from corroding magnetic core 20, favorably towards the side of testing pressure entrance 411
In the service life of promotion magnetic core 20, and it can prevent movable cover plate 42 from weakening the sensing between magnetic core 20 and induction coil 50
Relationship, and then improve induction coil 50 and sense the accuracy of 20 position of magnetic core, and then improve the essence of pressure sensor 100
Degree.
As shown in Fig. 2, one embodiment according to the present utility model, magnetic field shielding ring 10 and 40 integrated injection molding of shell into
Type, integrally formed structure have stronger structure and stability, bonding strength is larger to be hardly damaged, service life compared with
It is long, and integrally formed structure eliminates the connection result or position limiting structure between magnetic field shielding ring 10 and shell 40, not only
It is capable of the efficiency of assembling of adherence pressure sensor 100, moreover it is possible to which correction and maintenance for pressure sensor 100 provide conveniently.
In certain embodiments, magnetic field shielding ring 10 is FERRITE CORE 20, alumiaum article or copper fitting, due to iron oxygen
Body magnetic core 20, alumiaum article and copper fitting are respectively provided with the stronger anti-magnetic field bothered ability, can obstruct 10 outside of magnetic field shielding ring
Enter inner cavity 43 with electric field, so as to prevent the magnetic field in external environment and the inductance value of electric field influence induction coil 50, Jin Erti
Risen the precision of pressure sensor 100, and FERRITE CORE 20, the inoxidizability of alumiaum article and copper fitting and corrosion resistance compared with
It is good, the service life of pressure sensor 100 can be extended.
According to one embodiment of the use of the new type, pressure sensor 100 further includes：Memory module (not shown), storage
Module is connected with the communication of main control unit 30, and memory module can be the storage chip being located on main control unit 30, and memory module is stored up
There are the difference in inductance of induction coil 50 and the mapping table of pressure, the difference in inductance of induction coil 50 and the mapping table of pressure
Relation table between difference in inductance and pressure that can be staff obtain according to experiment, main control unit 30 is by induction coil 50
Difference in inductance substitute into difference in inductance in the mapping table of difference in inductance and pressure, and testing pressure is obtained according to corresponding pressure
Current pressure values.
By memory module of the setting with relation table between difference in inductance and pressure in pressure sensor 100, directly will
Inductance difference brings into and pressure value is obtained in table, simple and convenient, and accuracy is high, eliminates the calculating between inductance difference and pressure value
Process is not in calculating mistake, improves the reaction speed of pressure cooker, and the production cost of memory module is relatively low, easily
It obtains, the correction of information and importing process are fairly simple.
Optionally, it with testing pressure is big that the inductance value changing value of induction coil 50, which is the current inductance value of induction coil 50,
The difference of the inductance value of induction coil 50 is corresponded to during atmospheric pressure, specifically, magnetic core 20 moves in inner cavity 43, when inner cavity 43 not by
The influence of pressure cooker pressure, when under atmospheric pressure state, movable cover plate 42 is located at reset position, when pressure cooker works, if pressure
Pressure in power pot is P1, and the pressure-driven movable cover plate 42 in pressure cooker moves in inner cavity 43, at this time movable cover plate 42
In operating position, when movable cover plate 42 is located at reset position, magnetic core 20 is I1 to the inductance value of induction coil 50, works as movement
When cover board 42 is located at operating position, magnetic core 20 is I2 to the inductance value of induction coil 50, the inductance value changing value of induction coil 50
For I2-I1.
Under normal circumstances, when pressure cooker does not work under atmospheric pressure state, above-mentioned change of magnetic field strength amount can be pressure
Force snesor 100 detects pressure and provides convenient, and when pressure cooker does not work, change of magnetic field strength amount changing value is zero, corresponding
Pressure differential is zero, and for a user, directive function when pressure difference value is to cooking food more has relative to absolute pressure value
Meaning can provide conveniently for 30 control pressure pot of main control unit.
Further, the mapping table of difference in inductance and pressure is obtained by demarcating in advance, that is to say, that induction coil 50
Difference in inductance and pressure correspondence be previously according to the pressure in pressure cooker and main control unit 30 acquisition induction coil 50
Difference in inductance between relationship obtain, for example, staff can set a pressure-measuring device in electric cooker, and record sense
The difference in inductance of coil 50 is answered, is then pressurizeed to the cooking cavity of pressure cooker, then successively and the sense under different pressures state
The difference in inductance of coil 50 is answered, the booster pump with pressure value can also be used to pressurize for cooking cavity, then record different electricity successively
Feel pressure value during difference, then store difference in inductance and pressure difference value in memory module, for the control acquisition pair of main control unit 30
Pressure value during difference in inductance is answered, the directly control mapping table of main control unit 30 can obtain pressure value, can save pressure biography
The reaction time of sensor 100 improves the working efficiency of pressure sensor 100, and failure rate is relatively low.
According to other configuration examples of the pressure cooker of the utility model embodiment and operation for ordinary skill people
All it is known for member, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art
The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or
Person's feature can in an appropriate manner combine in any one or more embodiments or example.
While there has been shown and described that the embodiment of the utility model, it will be understood by those skilled in the art that：
In the case of the principle and objective for not departing from the utility model can these embodiments be carried out with a variety of variations, modification, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (10)
1. a kind of pressure sensor, which is characterized in that including：
Magnetic field shielding ring；
Magnetic core, the magnetic core are located in the magnetic field shielding ring, and the magnetic core is moved with the variation of testing pressure；
Induction coil, the induction coil are located in the magnetic field shielding ring, and the inductance value of the induction coil is with the magnetic
The variation of the position of core and change；
For detecting the inductance phasor measurement unit of the inductance value changing value of the induction coil, the inductance phasor measurement unit and institute
Induction coil is stated to be connected；
Main control unit, the main control unit are communicated with the inductance phasor measurement unit, and the main control unit is according to the line of induction
The inductance value changing value of circle obtains the current pressure values of the testing pressure.
2. pressure sensor according to claim 1, which is characterized in that further include：
Shell, the shell are located in the magnetic field shielding ring, and the shell has inner cavity, and the magnetic core is located at the inner cavity
Interior, the inner cavity is connected positioned at the part of the side of the magnetic core with the testing pressure, and the inner cavity is located at the magnetic
The part of the opposite side of core and atmosphere.
3. pressure sensor according to claim 2, which is characterized in that the shell includes：
Pedestal, the pedestal are located in the magnetic field shielding ring, and the inner cavity is formed on the pedestal and is set on the pedestal
There is testing pressure entrance in communication with the inner cavity；
Movable cover plate, the movable cover plate are movably arranged on the pedestal, and the magnetic core is located on the movable cover plate.
4. pressure sensor according to claim 3, which is characterized in that the magnetic core is located at the direction of the movable cover plate
The surface of the testing pressure entrance.
5. pressure sensor according to claim 2, which is characterized in that the magnetic field shielding ring is integrally noted with the shell
It is moulded into type.
6. pressure sensor according to any one of claims 1-5, which is characterized in that the magnetic field shielding ring is iron oxygen
Body magnetic core, alumiaum article or copper fitting.
7. pressure sensor according to any one of claims 1-5, which is characterized in that further include：
With the memory module of main control unit communication, the memory module stores the mapping table of difference in inductance and pressure,
The main control unit substitutes into the inductance value changing value of the induction coil in the mapping table of the difference in inductance and pressure
Difference in inductance, and according to the current pressure values of the corresponding pressure acquisition testing pressure.
8. pressure sensor according to claim 7, which is characterized in that the inductance value changing value of the induction coil is institute
State the difference of the inductance value of corresponding induction coil when the current inductance value of induction coil with the testing pressure is atmospheric pressure.
9. pressure sensor according to claim 7, which is characterized in that the mapping table of the difference in inductance and pressure by
Calibration obtains in advance.
10. a kind of pressure cooker, including the pressure sensor according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721548547.0U CN207570715U (en) | 2017-11-16 | 2017-11-16 | Pressure sensor and with its pressure cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721548547.0U CN207570715U (en) | 2017-11-16 | 2017-11-16 | Pressure sensor and with its pressure cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207570715U true CN207570715U (en) | 2018-07-03 |
Family
ID=62690913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721548547.0U Active CN207570715U (en) | 2017-11-16 | 2017-11-16 | Pressure sensor and with its pressure cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207570715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686806A (en) * | 2019-11-07 | 2020-01-14 | 徐州陀微传感科技有限公司 | Pressure sensor and preparation method thereof |
-
2017
- 2017-11-16 CN CN201721548547.0U patent/CN207570715U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686806A (en) * | 2019-11-07 | 2020-01-14 | 徐州陀微传感科技有限公司 | Pressure sensor and preparation method thereof |
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