CN206876311U - A kind of diaphragm pressure capacitance type sensor - Google Patents
A kind of diaphragm pressure capacitance type sensor Download PDFInfo
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- CN206876311U CN206876311U CN201720270683.1U CN201720270683U CN206876311U CN 206876311 U CN206876311 U CN 206876311U CN 201720270683 U CN201720270683 U CN 201720270683U CN 206876311 U CN206876311 U CN 206876311U
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- diaphragm pressure
- capacitance type
- seat
- mcu
- type sensor
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Abstract
It the utility model is related to a kind of diaphragm pressure capacitance type sensor, mainly include diaphragm pressure sensor, MCU, electric capacity, conductive foil and connector, MCU is connected by connector and the control of conductive foil and diaphragm pressure sensor circuit, electric capacity includes movable plate electrode, fixed plate and capacitor dielectric, micro-control units of the MCU as data processing；The Fundamentals of Sensors that the utility model is integrated using diaphragm pressure combination condenser type, the people to take one's seat must reach certain weight, and meet that the tissue of certain contact area is close；Dual judgement is realized, substantially increases the accuracy that identification people takes a seat, reduces the erroneous judgement that object is placed or extruded, so as to solve the unicity of traditional approach, it is the accuracy that people takes a seat to improve identification, realizes seat use state monitoring function.
Description
Technical field
It the utility model is related to movable sensor technical field, more particularly to a kind of diaphragm pressure capacitance type sensor.
Background technology
Seat sensor in currently available technology, taken a seat as long as there is certain pressure to be judged as someone, judgment mode list
One, the object of constant weight is placed with seat, erroneous judgement will be produced, without the dual judgement of weight and human body sensing, it is difficult to
Precisely judge whether that someone takes a seat for needs, the application for present seat is a lack of corresponding accurate detection technique.
With the constantly improve of national legislation, the requirement to vehicle safety performance is being improved constantly, and seat sensor can be got over
To apply more in different vehicles, only relatively reliable seat sensor, it just can guarantee that the installation with seat coordinates,
Sensor is set to play its optimal performance.
Therefore, it is necessary to develop a kind of diaphragm pressure capacitance type sensor.
The content of the invention
The defects of the purpose of this utility model is to overcome prior art, there is provided a kind of diaphragm pressure capacitance type sensor,
The accuracy that detection identification seat people takes a seat is improved, to achieve the above object, the utility model uses following technical scheme：
The utility model diaphragm pressure capacitance type sensor, mainly including diaphragm pressure sensor, MCU, electric capacity, conduction
Thin slice and connector, described MCU are connected by connector with conductive foil and diaphragm pressure sensor circuit, described electric capacity
Include movable plate electrode, fixed plate and capacitor dielectric, micro-control units of the described MCU as data processing.
Further scheme is：Described diaphragm pressure sensor is a kind of sensitive pressure switch, exports make-and-break signal.
Further scheme is：Described diaphragm pressure sensor is combined into " dry " font with capacitance type sensor.
Further scheme is：Described conductive foil is located at the intermediate rectangular part for diaphragm pressure capacitance type sensor,
Surrounding distribution round dot is the sensitive pressure contact of diaphragm pressure sensor.
Further scheme is：The upper and lower surface that described diaphragm pressure sensor combines with conductive foil is close to set
There are transparent PET film and primer to form.
The beneficial effect of the utility model compared with prior art is：The biography being integrated using diaphragm pressure combination condenser type
Sensor, the people to take one's seat must reach certain weight, and meet that the tissue of certain contact area is close.Realize double
Major punishment is broken, and substantially increases the accuracy that identification people takes a seat, and the erroneous judgement that object is placed or extruded is reduced, so as to solve tradition
The unicity of mode, it is the accuracy that people takes a seat to improve identification.
Brief description of the drawings
Fig. 1 is the combining structure schematic diagram of the utility model embodiment；
Fig. 2 is the capacitance type sensor principle schematic of the utility model embodiment；
Fig. 3 is the waveform diagram of the utility model embodiment.
Reference (1), diaphragm pressure sensor；(2), conductive foil；(3), connector； (4)、MCU；(5) pole, is determined
Plate；(6), movable plate electrode.
Embodiment
In order to more fully understand technology contents of the present utility model, with reference to specific embodiment to skill of the present utility model
Art scheme is further described and illustrated, but is not limited to this.
As Figure 1-3, the utility model diaphragm pressure capacitance type sensor, mainly including diaphragm pressure sensor (1),
MCU (4), electric capacity, conductive foil (2) and connector (3), MCU (4) pass through connector (3) and conductive foil (2) and film pressure
The control connection of force snesor (1) circuit, electric capacity include movable plate electrode (6), fixed plate (5) and capacitor dielectric, and MCU (4) is used as number
According to the micro-control unit of processing；
The workflow of diaphragm pressure capacitance type sensor is as follows：
A. on diaphragm pressure capacitance type sensor after electricity, MCU (4) is in low-power consumption mode；
B. when someone takes a seat, membrane-type pressure sensors can be expressed to, then the two of pressure sensor output pin is led
It is logical, enter working condition so as to wake up MCU (4)；
C. then MCU (4) sends pulse signal to the fixed plate (5) of rectangular conductive sheet；
D. MCU (4) was calculated to the time required for fixed plate (5) pulse charge simultaneously, and fixed plate (5) electric discharge when
Between；
E.MCU (4) adds discharge time sum to be used as the discharge and recharge time by calculating the charging interval, so as to be taken one's seat with no one
When the discharge and recharge time contrast, the discharge and recharge time when being taken one's seat more than no one the now discharge and recharge time, be judged as that someone takes a seat,
Otherwise it is judged as that nobody takes a seat；
F. someone takes a seat, and MCU (4) is just outside to export a high level signal, otherwise outwards exports a low level signal；
G. judge that completion reenters low-power consumption mode；
H. when people leaves from seat, membrane-type pressure sensors are unclamped, then the two of pressure sensor output pin breaks
Open, equally wake up MCU (4) and enter working condition；
I. then MCU (4) sends pulse signal to the fixed plate (5) of rectangular conductive sheet；
J. MCU (4) was calculated to the time required for fixed plate (5) pulse charge simultaneously, and fixed plate (5) electric discharge when
Between；
K.MCU (4) adds discharge time sum to be used as the discharge and recharge time by calculating the charging interval, so as to be taken one's seat with no one
When the discharge and recharge time contrast, the discharge and recharge time when being taken one's seat more than no one the now discharge and recharge time, be judged as that someone takes a seat,
Otherwise judge that people has been moved off seat；
L. someone leaves MCU (4) and just outwards exports a low level signal；
M. judge that completion enters back into low-power consumption mode；
N. job step b to step m is circulated.
Diaphragm pressure sensor (1) is a kind of sensitive pressure switch, exports make-and-break signal.
Diaphragm pressure sensor (1) is combined into " dry " font with capacitance type sensor, and it is film that conductive foil (2), which is located at,
The intermediate rectangular part of pressure capacitance formula sensor, surrounding distribution round dot are the sensitive pressure contact of diaphragm pressure sensor (1).
As shown in figure 3, wherein electric capacity mainly includes movable plate electrode (6), fixed plate (5), capacitor dielectric, movable plate electrode (6) is with determining
Distance is pole span between plate plate, and the area of plane is polar plate area between movable plate electrode (6) and fixed board plate, capacitor dielectric, pole span and pole
Plate suqare, change wherein any one amount, capacitance C can changed.If that is, be detected parameter pole span (when
Polar plate area, medium fix when) change capacitance C can be caused to change, so that it may using corresponding capacitance change realize
Parameter measurement.
Movable plate electrode (6) is the human body of sensing, and as the negative pole of electric capacity, fixed plate (5) is conductive foil, as electric capacity just
Pole, clothing, cushion or air of the capacitor dielectric between movable plate electrode (6) and fixed plate (5).
Again by capacitor charging time calculation formula：
Charging interval=R*C*ln ((E-V)/E)
R-- ohms；
C-- farads；
The applied voltage volt of E--RC series circuits；
The voltage to be reached on V-- electric capacity；
Ln is natural logrithm.
Electric capacity reaches the charging interval being full of, and relevant with the size of electric capacity, electric capacity is bigger, and the charging interval is longer, directly proportional；
Relevant with resistance sizes, resistance is bigger, and charging current is smaller, so the charging interval extends, it is directly proportional；Have with applied voltage size
Close, voltage is bigger, and the time is shorter.
As shown in figure 3, square waveform is the impulse waveform that MCU (4) is emitted, curve waveform is by fixed plate (5)
The waveform of discharge and recharge, T1 are the charging interval, and T2 is discharge time.
Diaphragm pressure sensor (1) and the upper and lower surface that conductive foil (2) combines be close to be provided with transparent PET film and
Primer is formed, and is protected combination sensor and is connected with connector (3) and MCU (4).
Conclusions understand that, using the sheet conducting material of certain area as fixed plate (5), conductive foil (2) is copper
Thin skin piece, carbon paste thin slice or elargol thin slice etc., resistance, electric current, applied voltage are immobilized, and the tissue of sensing is seen as
Movable plate electrode (6), during movable plate electrode (6) is close to fixed plate (5), the electric capacity C now formed on fixed plate (5) can increase
Greatly, when capacitance size changes, the time of charging can be with change, by this relation, as long as calculating the discharge and recharge of electric capacity
Time, it is possible to the variable quantity of electric capacity is obtained, so as to it may determine that whether someone takes a seat.
Car seat occupant's sensory perceptual system is can operate with, such as safety belt alarm sensor, taxi jeton, air bag
Sensing and driver disseat.There is this device, it can be more accurately perceived on seat either with or without people.
The beneficial effect of the utility model compared with prior art is：The biography being integrated using diaphragm pressure combination condenser type
Sensor principle, the people to take one's seat must reach certain weight, and meet that the tissue of certain contact area is close；Realize
Dual judgement, the accuracy that identification people takes a seat is substantially increased, reduce object and place or the erroneous judgement of extruding, so as to solving
The unicity of traditional approach, it is the accuracy that people takes a seat to improve identification, realizes seat use state monitoring function.
It is above-mentioned that technology contents of the present utility model are only further illustrated with embodiment, in order to reader is easier to understand,
But embodiment of the present utility model is not represented is only limitted to this, any technology extension or recreation done according to the utility model,
By protection of the present utility model.The scope of protection of the utility model is defined by claims.
Claims (5)
- A kind of 1. diaphragm pressure capacitance type sensor, it is characterised in that：Mainly include diaphragm pressure sensor, MCU, electric capacity, lead Electric thin slice and connector, described MCU are connected by connector with conductive foil and diaphragm pressure sensor circuit, described electricity Appearance includes movable plate electrode, fixed plate and capacitor dielectric, micro-control units of the described MCU as data processing.
- 2. diaphragm pressure capacitance type sensor according to claim 1, it is characterised in that：Described diaphragm pressure sensor It is a kind of sensitive pressure switch, exports make-and-break signal.
- 3. diaphragm pressure capacitance type sensor according to claim 1, it is characterised in that：Described diaphragm pressure sensor " dry " font is combined into capacitance type sensor.
- 4. diaphragm pressure capacitance type sensor according to claim 1, it is characterised in that：Described conductive foil is positioned at thin The intermediate rectangular part of film pressure capacitance type sensor, surrounding distribution round dot are the diaphragm pressure contact of diaphragm pressure sensor.
- 5. diaphragm pressure capacitance type sensor according to claim 1, it is characterised in that：Described diaphragm pressure sensor The upper and lower surface combined with conductive foil is close to be provided with transparent PET film and primer is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720270683.1U CN206876311U (en) | 2017-03-20 | 2017-03-20 | A kind of diaphragm pressure capacitance type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720270683.1U CN206876311U (en) | 2017-03-20 | 2017-03-20 | A kind of diaphragm pressure capacitance type sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206876311U true CN206876311U (en) | 2018-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720270683.1U Active CN206876311U (en) | 2017-03-20 | 2017-03-20 | A kind of diaphragm pressure capacitance type sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206876311U (en) |
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2017
- 2017-03-20 CN CN201720270683.1U patent/CN206876311U/en active Active
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