CN107152985A - The pressure measxurement control device and its pressure measxurement control method of a kind of air bag - Google Patents
The pressure measxurement control device and its pressure measxurement control method of a kind of air bag Download PDFInfo
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- CN107152985A CN107152985A CN201710308510.9A CN201710308510A CN107152985A CN 107152985 A CN107152985 A CN 107152985A CN 201710308510 A CN201710308510 A CN 201710308510A CN 107152985 A CN107152985 A CN 107152985A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 14
- 239000002775 capsule Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
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- 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
- G01L9/08—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 by making use of piezoelectric devices, i.e. electric circuits therefor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of pressure measxurement control device of air bag and its pressure measxurement control method, wherein, a kind of pressure measxurement control device of air bag includes the monitoring motor unit of control chip and at least one connection control chip, the monitoring motor unit includes the aerating device and means of deflation being arranged on the piezoelectric transducer of inside air bag and setting air bag, the piezoelectric type senses it and connects control chip and transmit pressure value information to control chip, and the aerating device and means of deflation connect control chip and by control chip control.The present invention is accurately measured the pressure value of inside air bag by using piezoelectric transducer, and reliable basis is provided for control inside air bag pressure value；Then coordinate control chip and aerating device and means of deflation to carry out effective control to the pressure value of inside air bag, realize the accurate control of air bag.
Description
Technical field
The present invention relates to the pressure measxurement control field of aerated product, and in particular to a kind of pressure measxurement control dress of air bag
Put and its pressure measxurement control method.
Background technology
The various material air bags of inflation are increasingly popularized now, such as airbed, inflatable dinghy, fire balloon, tire
Deng, but the accurate control for such product is not fully up to expectations always.
Aerated product is inflated to be allowed to expand generally by the air bag to aerated product.When the expansion for judging air bag
Whether degree reaches that requirement judges generally by artificial experience, and when discouraged situation occurs in use in aerated product
When, tonifying Qi whether is carried out also by artificial judgment, it is this to judge to control the method for gasbag pressure not reach according to artificial experience
It is accurate to require.
The content of the invention
It is an object of the invention to provide a kind of pressure measxurement control device of air bag and its pressure measxurement control method, it leads to
Pressure value is simultaneously sent to control chip by the pressure crossed in piezoelectric type Sensor monitoring air bag, by control chip control air pump and
Valve changes the pressure value in air bag, realizes the accurate control to the pressure in air bag.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of pressure measxurement control device of air bag, it includes control chip and the monitoring of at least one connection control chip is moved
Make unit, the monitoring motor unit includes being arranged on the piezoelectric transducer of inside air bag and sets the inflation on air bag to fill
Put and means of deflation, the piezoelectric type senses it and connects control chip and transmit pressure value information, the inflation to control chip
Device and means of deflation connect control chip and by control chip control.
The piezoelectric transducer include bottom plate and piezoresistive material flitch, bottom plate and piezoelectric plate shape into a closed cavity,
It is vacuum state inside the closed cavity；At least one electrode is provided with bottom plate, the electrode is contacted with piezoresistive material flitch.
The periphery of the piezoresistive material flitch and bottom plate sets a containment vessel, and the containment vessel is provided with passage.
The control device also includes a piezoelectric transducer for being arranged on outside air bag and connecting control chip.
The control chip, which is set with, limits the pressure difference value scope whether aerating device and means of deflation run.
Two or more piezoelectric transducer is set in the air bag.
The aerating device is inflator pump, and the means of deflation is air exhaust pump or valve.
A kind of pressure measxurement control method of air bag, specifically includes following steps：
Step 1, by piezoelectric transducer the pressure value of inside air bag is measured, and obtained pressure value transmission will be measured
To control chip；
Step 2, control chip will measure obtained pressure value with wanting that the pressure value reached is compared, the pressure obtained when measurement
Force value goes to step 3 less than when wanting the pressure value reached, when the pressure value that measurement is obtained is more than the pressure value for wanting to reach
When, step 4 is gone to, it is described to want that the pressure value reached is set by control chip；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
Pressure value is equal to the pressure value for wanting to reach, aerating device is out of service；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
Pressure value is equal to the pressure value for wanting to reach, means of deflation is out of service.
A kind of pressure measxurement control method of air bag, specifically includes following steps：
Step 1, measure inside air bag pressure value and air bag external pressure value respectively by piezoelectric transducer, and measurement is obtained
Pressure value be sent to control chip；
Step 2, control chip, which subtract each other the pressure value outside the pressure value and air bag of inside air bag, obtains the relative of inside air bag
Pressure value, by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：When the phase of inside air bag
The relative pressure for wanting to reach is less than to pressure, step 3 is gone to, when the relative pressure of inside air bag is more than the phase for wanting to reach
To pressure value, step 4 is gone to；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
A kind of pressure measxurement control method of air bag, specifically includes following steps：
Step 1, measure inside air bag pressure value and air bag external pressure value respectively by piezoelectric transducer, and measurement is obtained
Pressure value be sent to control chip；
Step 2, control chip, which subtract each other the pressure value outside the pressure value and air bag of inside air bag, obtains the relative of inside air bag
Pressure value, then by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：Work as inside air bag
Relative pressure be less than and want the relative pressure that reaches, and difference between the two more than pressure difference value scope when, go to step
Rapid 3, want the relative pressure that reaches when the relative pressure of inside air bag is more than, and difference between the two is more than pressure difference value
During scope, step 4 is gone to；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
A kind of pressure measxurement control method of air bag, specifically includes following steps：
Step 1, measured respectively outside the pressure value and air bag of inside air bag diverse location by two or more piezoelectric transducer
Pressure value, and the pressure value that measurement is obtained is sent to control chip；
Step 2, pressure value and air bag external pressure value that each piezoelectric transducer measurement of inside air bag is obtained are subtracted each other
To multiple differences, each difference is multiplied by average after deviation calibration value K obtains the relative pressure of inside air bag；
Step 3, control chip subtract each other comprehensive inside air bag pressure value and air bag external pressure value the phase for obtaining inside air bag
To pressure value, then by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：When in air bag
The relative pressure in portion, which is less than, wants the relative pressure that reaches, and difference between the two more than pressure difference value scope when, go to
Step 4, the relative pressure that reaches is wanted when the relative pressure of inside air bag is more than, and difference between the two is more than pressure differential
When being worth scope, step 5 is gone to；
Step 4, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 5, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
The present invention is accurately measured the pressure value of inside air bag by using piezoelectric transducer, in control air bag
Portion's pressure value provides reliable basis；Then control chip and aerating device and means of deflation are coordinated to the pressure of inside air bag
Value has carried out effective control, realizes the accurate control of air bag.
In addition, by setting up a piezoelectric transducer outside air bag, making the internal pressure of air bag with the change of external pressure
Change and change, to ensure that aerated product can be flexibly applied to different environment.By setting two or more piezoelectricity in air bag
Formula sensor, can avoid inside air bag pressure occur be distributed in a short time it is inconsistent in the case of caused by measurement obtain
Inside air bag pressure value it is not accurate enough the problem of, it is ensured that inside air bag pressure value measurement accuracy, and then ensure to air bag
Accurate control, more than two piezoelectric transducers can be arranged at different positions.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is structural representation when air bag of the present invention is applied to different external environment conditions；
Fig. 3 is structural representation when inside air bag air pressure of the present invention is inconsistent；
Fig. 4 is applied to structural representation during two air bags for the present invention；
Fig. 5 is piezoelectric transducer structural representation of the present invention；
Fig. 6 is piezoelectric transducer sectional view of the present invention.
Embodiment
The present invention is described in detail below with reference to the drawings and specific embodiments.
Present invention is disclosed a kind of pressure control device of air bag, it includes control chip 3 and at least one connection control
The monitoring motor unit of coremaking piece 3, the monitoring motor unit includes being arranged on the piezoelectric transducer 1 inside air bag 2 and setting
Put the aerating device and means of deflation on air bag 2.Wherein, piezoelectric transducer 1 connects control chip 3 and passed to control chip 3
Pressurization pressure value information, aerating device and means of deflation connection control chip 3 are simultaneously controlled by control chip 3.
Above-mentioned piezoelectric transducer 1 outside need not provide signal, produce signal self by deformation, vibrations, thus survey
The pressure value in air bag is measured, the circuit of sensor 1 is simple, low in energy consumption during the piezoelectricity and accuracy is high, so as to improve the gas
The control accuracy of the pressure measxurement control device of capsule.
As shown in Figure 5 and Figure 6, above-mentioned piezoelectric transducer 1 includes bottom plate 104 and piezoresistive material flitch 103, the He of bottom plate 104
It is vacuum state inside one closed cavity of formation of piezoresistive material flitch 103, the closed cavity；At least one is provided with bottom plate 104
Electrode 105, the electrode 105 is contacted with piezoresistive material flitch 103.When the external pressure of piezoelectric transducer 1 is more than 0pa, it will
Pressure is produced on piezoresistive material flitch 103, the stress of piezoresistive material flitch 103 produces electric signal, passed by measuring at least one electrode 102
The electric signal that output comes, calculates size of the piezoresistive material flitch 103 by power, so as to calculate the outer of the piezoelectric transducer 1
The exact value of portion's pressure.
In order to protect the piezoelectric transducer 1, in the periphery of piezoresistive material flitch 103 and bottom plate 104 one can be set to protect
Shell 101, the containment vessel 101 is provided with passage 102.
Aerating device can use inflator pump 4, and means of deflation can use air exhaust pump or valve 5, certain aerating device
Inflation pump can also be used with means of deflation.
As shown in figure 1, in the present embodiment, aerating device is realized using inflator pump 4, means of deflation using valve 5 come
Realize.
To should air bag pressure measxurement control device air bag pressure measxurement control method it is as follows：
Step 1, by piezoelectric transducer 1 pressure value inside air bag 2 is measured, and obtained pressure value will be measured and passed
Deliver to control chip 3.
Step 2, control chip 3 will measure obtained pressure value with wanting that the pressure value reached is compared, when measuring
To pressure value be less than want the pressure value reached when, step 3 is gone to, when the obtained pressure value of measurement is more than the pressure for wanting to reach
During force value, step 4 is gone to, the above-mentioned pressure value for wanting to reach is set by control chip 3；
Step 3, control chip 3 send instruction to inflator pump 4, and inflator pump 4 is run, until piezoelectric transducer 1 measures what is obtained
Pressure value is equal to the pressure value for wanting to reach, inflator pump 4 is out of service；
Step 4, control chip 3 send instruction to valve 5, and valve 5 is opened, until piezoelectric transducer 1 measures obtained pressure
Value is equal to the pressure value for wanting to reach, valve 5 is closed.
Accurate control to inside air bag pressure value can be realized by the pressure measxurement control device and method of the air bag.
In actual application, the expansion of air bag 2 depends on the difference of the inside and outside pressure of air bag 2, if external pressure changes
Become, and the indeclinable words of internal pressure, the situation of air bag expansion will change.Therefore, in order that the internal pressure of air bag 2 with
The change of external pressure and change, to ensure that aerated product can be flexibly applied to different environment, as shown in Fig. 2 air bag
Pressure measxurement control device sets the piezoelectric transducer 6 of a connection control chip 3 outside air bag 2.
Now, the pressure measxurement control method of air bag is specific as follows：
Step 1, measure the internal pressure value of air bag 2 and the external pressure value of air bag 2 respectively by piezoelectric transducer 1,6, and will survey
The pressure value measured is sent to control chip 3；
Step 2, control chip 3, which subtract each other the pressure value outside the pressure value inside air bag 2 and air bag 2, to be obtained inside air bag 2
Relative pressure, by the relative pressure inside the air bag 2 with wanting that the relative pressure reached is compared：When in air bag 2
The relative pressure in portion is less than the relative pressure for wanting to reach, goes to step 3, and the relative pressure inside air bag 2, which is more than, to be thought
The relative pressure reached, goes to step 4；
Step 3, control chip 3 send instruction to inflator pump 4, and inflator pump 4 is run, until the measurement of piezoelectric transducer 1,6 is obtained
The difference of pressure value be that the relative pressure of inside air bag is equal to and wants the relative value pressure value that reaches, inflator pump 4 stops transporting
OK；
Step 4, control chip 3 send instruction to valve 5, and valve 5 is opened, until piezoelectric transducer 1,6 measures obtained pressure
The difference of force value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, valve 5 is closed.
The accurate control of the internal pressure value of air bag 2 can be realized by the pressure measxurement control device and method of the air bag,
Meanwhile, when air bag 2 is applied to the external environment condition of different pressures value, pressure value inside air bag 2 can with external environment condition change
Change and change, the relative pressure in air bag 2 is kept constant, improve the using effect of air bag 2.
As shown in figure 3, the frequent operation in order to prevent inflator pump 4 and valve 5, control chip 3 sets a pressure difference value model
Enclose, only when the difference between the relative pressure that inside air bag relative pressure and wanting reaches exceeds pressure difference value scope
When, control chip 3 can just control inflator pump 4 or valve 5 to run, and effectively prevent inflator pump 4 and valve 5 draws because of frequent operation
The damage problem risen.
Now, the pressure measxurement control method of air bag is specific as follows：
Step 1, measure the internal pressure value of air bag 2 and the external pressure value of air bag 2 respectively by piezoelectric transducer 1,6, and will survey
The pressure value measured is sent to control chip 3；
Step 2, control chip 3, which subtract each other the pressure value outside the pressure value inside air bag 2 and air bag 2, to be obtained inside air bag 2
Relative pressure, then by the relative pressure inside the air bag 2 with wanting that the relative pressure reached is compared：Work as air bag
Relative pressure inside 2 is less than the relative pressure for wanting to reach, and difference between the two is when being more than pressure difference value scope, turn
To step 3, the relative pressure inside air bag 2 is more than the relative pressure for wanting to reach, and difference between the two is more than and pressed
During power difference range, step 4 is gone to；
Step 3, control chip 3 send instruction to inflator pump 4, and inflator pump 4 is run, until the measurement of piezoelectric transducer 1,6 is obtained
The difference of pressure value be that relative pressure inside air bag 2 is equal to the relative value pressure value for wanting to reach, inflator pump 4 stops transporting
OK；
Step 4, control chip 3 send instruction to valve 5, and valve 5 is opened, until piezoelectric transducer 1,6 measures obtained pressure
The difference of force value is that the relative pressure inside air bag 2 is equal to the relative value pressure value for wanting to reach, valve 5 is closed.
As shown in figure 4, it is some it is special in the case of, the pressure inside air bag 2 occur in a short time distribution differs
The situation of cause, then in that case, it is not accurate enough to may result in the obtained internal pressure value of air bag 2 of measurement, so as to make
Go out to deflate or inflation action so that the internal pressure of air bag 2 fruit is high or using effect too low and that influence aerated product.In order to solve
The problem of pressure measxurement of this kind of situation lower gasbag 2 is inaccurate, can set in the air bag 2 three piezoelectric transducers 11,12,
13, for measuring the pressure value inside air bag 2, then three piezoelectric transducers 11,12,13 are measured the pressure value that draws with
Air bag external pressure value is compared calculating, so as to improve the pressure measurement accuracy of air bag 2, three pressure sensors 11,12,
13 are arranged at diverse location.
Now, the pressure measxurement control method of air bag is specific as follows：
Step 1, the pressure value measured respectively at the inside diverse location of air bag 2 by three piezoelectric transducers 11,12,13 are gentle
The external pressure value of capsule 2, and the pressure value that measurement is obtained is sent to control chip 3；
Step 2, pressure value and air bag external pressure value that each piezoelectric transducer measurement of inside air bag is obtained are subtracted each other
To multiple differences, each difference is multiplied by average after deviation calibration value K obtains the relative pressure of inside air bag；
Step 3, by the relative pressure inside the air bag 2 with wanting that the relative pressure reached is compared：When 2 in air bag
Relative pressure be less than and want the relative pressure that reaches, and difference between the two more than pressure difference value scope when, go to step
Rapid 4, relative pressure inside air bag 2 is more than the relative pressure for wanting to reach, and difference between the two is more than pressure differential
When being worth scope, step 5 is gone to；
Step 4, control chip 3 send instruction to inflator pump 4, and inflator pump 4 is run, until the measurement of piezoelectric transducer 1,6 is obtained
The difference of pressure value be that relative pressure inside air bag 2 is equal to the relative value pressure value for wanting to reach, inflator pump 4 stops transporting
OK；
Step 5, control chip 3 send instruction to valve 5, and valve 5 is opened, until piezoelectric transducer 1,6 measures obtained pressure
The difference of force value is that the relative pressure inside air bag 2 is equal to the relative value pressure value for wanting to reach, valve 5 is closed.
It is single that monitoring action is equipped with when an aerated product is provided with two air bag 21,22, on each air bag 21,22
Member, the monitoring motor unit includes being arranged on the piezoelectric transducer 14,15 inside air bag 21,22 and set on air bag 2
Aerating device and means of deflation.Wherein, piezoelectric type senses 14,15 its connection control chip 3 and transmits pressure value to control chip 3
Information, aerating device and means of deflation connection control chip 3 are simultaneously controlled by control chip 3, and a monitoring gas is additionally provided with outside air bag 2
The piezoelectric transducer 6 of pressure value outside capsule 2.
Now, the pressure measxurement control method of air bag is specific as follows：
Step 1, the internal pressure value and external pressure value for measuring by piezoelectric transducer 14,15 two air bags 21,22 respectively,
And the pressure value for obtaining measurement is sent to control chip 3；
Step 2, control chip the internal pressure value and its external pressure value of each air bag 21,22 are subtracted each other obtain air bag 21,
Relative pressure inside 22, then by the relative pressure inside the air bag 21,22 with wanting that the relative pressure reached enters
Row compares：Relative pressure inside air bag 21,22 is less than the relative pressure for wanting to reach, and difference between the two is more than
During pressure difference value scope, step 3 is gone to, the relative pressure inside air bag 21,22 is more than the relative pressure for wanting to reach, and
When difference between the two is more than pressure difference value scope, step 4 is gone to；
Step 3, control chip 3 send instruction to inflator pump 4, and inflator pump 4 is run, until piezoelectric transducer 14,15,6 is measured
The difference of the obtained pressure value i.e. relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, inflator pump 4 stops
Only run；
Step 4, control chip 3 send instruction to valve 5, and valve 5 is opened, until the measurement of piezoelectric transducer 14,15,6 is obtained
The difference of pressure value be that relative pressure inside air bag 2 is equal to the relative value pressure value for wanting to reach, valve 5 is closed.
For example, when the pressure monitoring control device of the air bag is applied to the aerated product of only one of which air bag 2, by piezoelectricity
It is the pressure value outside 103865pa and air bag 2 that formula sensor 1,6 and control chip 3, which calculate the pressure value inside air bag 2,
For 101325pa, inside air bag relative pressure is just 103865-101325=2540pa, and wants the relative pressure that reaches
For 4000pa, inside air bag relative pressure 2540pa is less than the pressure value 4000pa for wanting to reach, and two values are poor
4000pa-2540pa=1460pa is more than the pressure difference value scope 100pa that control chip 3 is set, and now control chip 3 will be controlled
Inflator pump 4 processed starts inflation, it is assumed that it is still 101325pa that the pressure value outside air bag 2, which does not change, then when control chip 2 is counted
When the pressure value that calculation piezoelectric transducer 1 is measured is 105325pa, i.e., the inside relative pressure of air bag 2 is 105325pa-
Inflator pump 4 stops during 1101325pa=4000pa；Assuming that the pressure value outside air bag 2 changes into 101210pa, then work as control
The pressure value that the calculating piezoelectric transducer 1 of chip 3 is measured is 105210pa, i.e. the inside relative pressure of air bag 2 is
During 105210pa-101210pa=4000pa, inflator pump 4 stops.
If it is gentle for 103865pa to calculate the pressure inside air bag 2 by piezoelectric transducer 1,6 and control chip
Pressure value outside capsule 2 is 101325pa, and the inside relative pressure of air bag 2 is just 103865-101325=2540pa, and we
The relative pressure for wanting to reach is 1000pa, and the inside relative pressure 2540pa of air bag 2 is more than the pressure relative to force for wanting to reach
Value 1000pa, and two values difference 2540pa-1000pa=1540pa is more than the pressure difference value scope 100pa of setting in system,
Now control chip 3 will the startup deflation of control valve 5.Assuming that it is still 101325pa that the pressure value outside air bag 2, which does not change,
So when the pressure value that the calculating piezoelectric transducer 1 of control chip 3 is measured is the relative pressure in 102325pa, i.e. air bag 2
Valve 5 stops when being worth for 102325pa-101325pa=1000pa；Assuming that the pressure value outside air bag 2 changes into 101210pa,
So when the pressure value that the calculating piezoelectric transducer 1 of control chip 3 is measured is the relative pressure in 102210pa, i.e. air bag 2
Valve 5 stops when being worth for 102210pa-101210pa=1000pa.
The present invention's it is critical that the present invention carries out standard by using piezoelectric transducer 1 to the pressure value inside air bag 2
Really measurement, reliable basis is provided for the control internal pressure value of air bag 2；Then coordinate control chip 3 and aerating device and put
Device of air has carried out effective control to the pressure value inside air bag 2, realizes the accurate control of air bag 2.
In addition, by setting up a piezoelectric transducer 6 outside air bag 2, making the internal pressure of air bag 2 with external pressure
Change and change, to ensure that aerated product can be flexibly applied to different environment.By being set at the diverse location in air bag 2
Multiple piezoelectric transducers 11,12,13 are put, the appearance of the pressure inside air bag 2 can be avoided to be distributed in a short time inconsistent
In the case of caused by the obtained internal pressure value of air bag 2 of measurement it is not accurate enough the problem of, it is ensured that the measurement of the internal pressure value of air bag 2
Accuracy, and then ensure the accurate control to air bag 2.
It is described above, only it is the embodiment of the present invention, is not intended to limit the scope of the present invention, thus it is every
Any subtle modifications, equivalent variations and modifications that technical spirit according to the present invention is made to above example, still fall within this
In the range of inventive technique scheme.
Claims (11)
1. a kind of pressure measxurement control device of air bag, it is characterised in that：Including control chip and at least one connection control
The monitoring motor unit of chip, the monitoring motor unit includes the piezoelectric transducer for being arranged on inside air bag and sets gas
Aerating device and means of deflation on capsule, the piezoelectric type sense it and connect control chip and believe to control chip transmission pressure value
Breath, the aerating device and means of deflation connect control chip and by control chip control.
2. a kind of pressure measxurement control device of air bag according to claim 1, it is characterised in that：The piezoelectric type sensing
Device includes bottom plate and piezoresistive material flitch, and bottom plate and piezoelectric plate shape are vacuum shape into a closed cavity, inside the closed cavity
State；At least one electrode is provided with bottom plate, the electrode is contacted with piezoresistive material flitch.
3. a kind of pressure measxurement control device of air bag according to claim 2, it is characterised in that：The piezoresistive material flitch
One containment vessel is set with the periphery of bottom plate, the containment vessel is provided with passage.
4. a kind of pressure measxurement control device of air bag according to claim 1, it is characterised in that：The control device is also
The piezoelectric transducer of control chip is arranged on outside air bag and connected including one.
5. a kind of pressure measxurement control device of air bag according to claim 1, it is characterised in that：The control chip is set
Surely have and limit the pressure difference value scope whether aerating device and means of deflation run.
6. a kind of pressure measxurement control device of air bag according to claim 1, it is characterised in that：Set in the air bag
Two or more piezoelectric transducer.
7. according to a kind of pressure measxurement control device of any described air bag of claim 1 to 6, it is characterised in that：It is described to fill
Device of air is inflator pump, and the means of deflation is air exhaust pump or valve.
8. a kind of pressure measxurement control method of air bag, it is characterised in that：Specifically include following steps：
Step 1, by piezoelectric transducer the pressure value of inside air bag is measured, and obtained pressure value transmission will be measured
To control chip；
Step 2, control chip will measure obtained pressure value with wanting that the pressure value reached is compared, the pressure obtained when measurement
Force value goes to step 3 less than when wanting the pressure value reached, when the pressure value that measurement is obtained is more than the pressure value for wanting to reach
When, step 4 is gone to, it is described to want that the pressure value reached is set by control chip；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
Pressure value is equal to the pressure value for wanting to reach, aerating device is out of service；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
Pressure value is equal to the pressure value for wanting to reach, means of deflation is out of service.
9. a kind of pressure measxurement control method of air bag, it is characterised in that：Specifically include following steps：
Step 1, measure inside air bag pressure value and air bag external pressure value respectively by piezoelectric transducer, and measurement is obtained
Pressure value be sent to control chip；
Step 2, control chip, which subtract each other the pressure value outside the pressure value and air bag of inside air bag, obtains the relative of inside air bag
Pressure value, by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：When the phase of inside air bag
The relative pressure for wanting to reach is less than to pressure, step 3 is gone to, when the relative pressure of inside air bag is more than the phase for wanting to reach
To pressure value, step 4 is gone to；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
10. a kind of pressure measxurement control method of air bag, it is characterised in that：Specifically include following steps：
Step 1, measure inside air bag pressure value and air bag external pressure value respectively by piezoelectric transducer, and measurement is obtained
Pressure value be sent to control chip；
Step 2, control chip, which subtract each other the pressure value outside the pressure value and air bag of inside air bag, obtains the relative of inside air bag
Pressure value, then by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：Work as inside air bag
Relative pressure be less than and want the relative pressure that reaches, and difference between the two more than pressure difference value scope when, go to step
Rapid 3, want the relative pressure that reaches when the relative pressure of inside air bag is more than, and difference between the two is more than pressure difference value
During scope, step 4 is gone to；
Step 3, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 4, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
11. a kind of pressure measxurement control method of air bag, it is characterised in that：Specifically include following steps：
Step 1, measured respectively outside the pressure value and air bag of inside air bag diverse location by two or more piezoelectric transducer
Pressure value, and the pressure value that measurement is obtained is sent to control chip；
Step 2, pressure value and air bag external pressure value that each piezoelectric transducer measurement of inside air bag is obtained are subtracted each other
To multiple differences, each difference is multiplied by average after deviation calibration value K obtains the relative pressure of inside air bag；
Step 3, control chip subtract each other comprehensive inside air bag pressure value and air bag external pressure value the phase for obtaining inside air bag
To pressure value, then by the relative pressure of the inside air bag with wanting that the relative pressure reached is compared：When in air bag
The relative pressure in portion, which is less than, wants the relative pressure that reaches, and difference between the two more than pressure difference value scope when, go to
Step 4, the relative pressure that reaches is wanted when the relative pressure of inside air bag is more than, and difference between the two is more than pressure differential
When being worth scope, step 5 is gone to；
Step 4, control chip send instruction to aerating device, and aerating device operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, aerating device stops fortune
OK；
Step 5, control chip send instruction to means of deflation, and means of deflation operation is obtained until piezoelectric transducer measurement
The difference of pressure value is that the relative pressure of inside air bag is equal to the relative value pressure value for wanting to reach, means of deflation stops fortune
OK.
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| CN109799849A (en) * | 2019-03-12 | 2019-05-24 | 北京星网宇达科技股份有限公司 | Inflatable material voltage-stabilizing system and inflatable material method for stabilizing voltage |
| CN109965934A (en) * | 2019-03-01 | 2019-07-05 | 齐鲁工业大学 | A kind of electronics air pressure haemostat measurement and control system |
| CN111907459A (en) * | 2020-07-29 | 2020-11-10 | 廊坊市金色时光科技发展有限公司 | Air medium detection sensing device and automobile seat |
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