CN108458817A - A kind of novel pressure electric-type pressure sensor - Google Patents
A kind of novel pressure electric-type pressure sensor Download PDFInfo
- Publication number
- CN108458817A CN108458817A CN201810418585.7A CN201810418585A CN108458817A CN 108458817 A CN108458817 A CN 108458817A CN 201810418585 A CN201810418585 A CN 201810418585A CN 108458817 A CN108458817 A CN 108458817A
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- Prior art keywords
- data processor
- pressure
- piezoelectric type
- data
- measurement device
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Links
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 238000013500 data storage Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 238000009530 blood pressure measurement Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000295 complement effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 11
- 239000013078 crystal Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A kind of novel pressure electric-type pressure sensor, including piezoelectric type vane, charge measurement device, data processor and data storage, piezoelectric type vane, charge measurement device and data processor are sequentially connected, data processor and data storage are bi-directionally connected, piezoelectric type vane external capacitor measuring appliance, capacitometer are attached with data processor again.Beneficial effects of the present invention are：This kind of sensor, which is efficiently solved, to be difficult to carry out the defect of pressure measurement in piezoelectric type vane stress balance, is additionally used capacitometer to carry out complementary correction to the result of voltage measurement, is further ensured the accuracy of pressure measurement.
Description
Technical field
The present invention relates to the piezoelectric pressure indicators under a kind of sensor more particularly to a kind of measurable static(al) state.
Background technology
Piezoelectric pressure indicator is a kind of pressure sensor based on piezoelectric effect, is to utilize direct piezoelectric effect system mostly
At.Direct piezoelectric effect refers to the internal just generation polarization when crystal is acted on by certain fixed-direction external force, simultaneously
The opposite charge of symbol is generated on certain two surface；After external force removes, crystal is restored to uncharged state again；Work as external force
When action direction changes, the polarity of charge also changes correspondingly；The quantity of electric charge caused by crystal stress is directly proportional to the size of external force.
Existing piezoelectric pressure indicator generates deformation with the pressure of external force, which can cause charge in piezoelectricity
It accumulating between the pole plate of formula vane, after piezoelectric type vane stress balance, deformation stops, and does not have new charge and generates, this
Disappearance can be lost in the preceding charge accumulated between pole plate in circuit, so that at static(al) (i.e. stress balance), piezoelectric type passes
The output voltage for feeling piece is 0.Therefore, existing piezoelectric pressure indicator can only be measured there are pressure when directed varying forces, cannot
Measure pressure when static(al).
Therefore, it for disadvantages described above, needs effectively to innovate the prior art.
Invention content
For disadvantages described above, the purpose of the present invention is to provide a kind of novel pressure electric-type pressure sensor, this kind of sensors
It efficiently solves and is difficult to carry out the defect of pressure measurement in piezoelectric type vane stress balance, additionally use capacitometer
Complementary correction is carried out to the result of voltage measurement, further ensures the accuracy of pressure measurement.
To achieve the above object, the present invention uses following technical scheme：
A kind of novel pressure electric-type pressure sensor, including piezoelectric type vane, charge measurement device, data processor and number
According to memory, the piezoelectric type vane is used for the induction of pressure, and the charge measurement device is for measuring piezoelectric type sensing
The piezoelectric effect of piece, the data processor is used to the measurement data that charge measurement device obtains being converted to pressure value, described
The data storage pressure value that processor obtains for storing data, wherein piezoelectric type vane, charge measurement device and number
It is sequentially connected according to processor, data processor and data storage are bi-directionally connected；
Correspondingly, piezoelectric type vane external capacitor measuring appliance, capacitometer are attached with data processor again, electricity
Hold measuring appliance and charge measurement device works at the same time, the data of capacitance measurement are used for auxiliary corrective charge after data processor processes
The pressure value that measuring appliance obtains, to reduce measurement error；
Correspondingly, direction of the data processor by the polarity judgment of charge measurement device measured value, in existing pressure value
On the basis of added and subtracted and be stored in data storage；
Correspondingly, data processor external temperature sensor, temperature sensor measurement environment temperature, to correct because of temperature
The variation of the measured value of caused charge measurement device and capacitometer.
Beneficial effects of the present invention are：
One, it is measured using piezoelectric sensing piece, because the quantity of electric charge that piezoelectric effect generates is directly proportional, the rate of change with power
It is unrelated, the error of measurement can be reduced.
Two, data storage this module is increased, and data storage is required to carry out two-way company with data processor
It connects, in piezoelectric type vane stress balance, the previous secondary data stored in direct called data memory effectively solve
Output voltage values are 0 in piezoelectric type vane stress balance, the problem of then leading to not correct output pressure value；
Three, capacitometer and piezoelectric type vane form oscillating circuit, realize the pressure measurement of the second circuit, and electricity
Hold the pressure value that measuring appliance measures and can be used for the pressure value that auxiliary corrective charge measurement device measures, to reduce measurement error, improves
The precision measured；
Four, the temperature of measuring environment is monitored in real time using temperature sensor, is surveyed caused by temperature to correct
Measure error.
Description of the drawings
Below according to attached drawing, invention is further described in detail：
Fig. 1 is the structure connection diagram of the present invention；
Fig. 2 is that the implementation in embodiment illustrates schematic diagram；
In figure：
1, piezoelectric type vane；2, charge measurement device；3, data processor；4, data storage；5, capacitometer；6、
Temperature sensor.
Specific implementation mode
As shown in Figure 1, a kind of novel pressure electric-type pressure sensor, including piezoelectric type vane 1, charge measurement device 2, data
Processor 3 and data storage 4, piezoelectric type vane 1 are used for the induction of pressure, and charge measurement device 2 is for measuring piezoelectric type
The piezoelectric effect of vane 1, data processor 3 are used to the measurement data that charge measurement device 2 obtains being converted to pressure value, data
The pressure value that processor 3 obtains for storing data of memory 4, wherein piezoelectric type vane 1, charge measurement device 2 and data
Processor 3 is sequentially connected, and data processor 3 and data storage 4 are bi-directionally connected, 1 external capacitor measuring appliance of piezoelectric type vane
5, capacitometer 5 is attached with data processor 3 again.
Illustrate the use state of the present invention below：
As shown in Fig. 2, external force Δ F1It is applied on piezoelectric type vane 1, generates piezoelectric effect, adopted through charge measurement device 2
Collection obtains data V1, V1After the acquisition of charge measurement device 2, it is transmitted to data processor 3,3 V received of data processor1Turn
Change pressure value Δ F into1, while Δ F1It is saved in data storage 4.Later, 1 stress balance of piezoelectric type vane, is no longer produced
Raw new charge, and loss disappears the charge that a preceding piezoelectric effect generates quickly in circuit.Therefore in stress balance, pressure
The output voltage of electric-type vane 1 is 0.Due to measured value Δ F before1It is already saved in data storage 4, therefore this biography
Sensor still can export correct pressure value Δ F in stress balance1；
External force Δ F2It is applied on piezoelectric type vane 1, generates piezoelectric effect, data are collected through charge measurement device 2
V2, V2By identical flow, it is converted into pressure value Δ F2.Due to V1And V2Polarity is identical, and data processor 3 judges that they are same
Xiang Li, data processor 3 is in stored pressure Δ F1On the basis of, in addition new variation delta F2, obtain current pressure values Δ
F1+ΔF2；
External force Δ F3It is applied on piezoelectric type vane 1, generates piezoelectric effect, data are collected through charge measurement device 2
V3, V3It is converted into pressure value Δ F by identical flow3.Due to V3Same V2、V1Polarity is on the contrary, data processor 3 judges that they are
Opposite force, data processor 3 are storing pressure Δ F1+ΔF2On the basis of, subtract new variation delta F3, obtain current pressure
Force value Δ F1+ΔF2-ΔF3。
At the same time, since the capacitance of piezoelectric type vane 1 is also with pressure change, piezoelectricity is measured using capacitometer 5
The capacitance of formula vane 1 is used for when first used, nominal pressure initial value.And during follow-up use, capacitance measurement
The pressure value that device 5 measures, for the pressure value that auxiliary corrective charge measuring appliance 2 measures, to reduce measurement error.
Since piezoelectric effect and capacitance variations are all affected by temperature, temperature sensor 6 measures Current Temperatures, data processor
3 according to the temperature correction current pressure values.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (4)
1. a kind of novel pressure electric-type pressure sensor, including piezoelectric type vane, charge measurement device, data processor and data
Memory, it is characterised in that：Piezoelectric type vane, charge measurement device and the data processor is sequentially connected, at data
Reason device and data storage are bi-directionally connected.
2. a kind of novel pressure electric-type pressure sensor according to claim 1, it is characterised in that：The piezoelectric type sensing
Piece external capacitor measuring appliance, capacitometer are attached with data processor again.
3. a kind of novel pressure electric-type pressure sensor according to claim 1, it is characterised in that：The data processor
By the direction of the polarity judgment of charge measurement device measured value, is added and subtracted on the basis of having pressure value and be stored in number
According to memory.
4. a kind of novel pressure electric-type pressure sensor according to claim 1, it is characterised in that：The data processor
External temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418585.7A CN108458817A (en) | 2018-05-04 | 2018-05-04 | A kind of novel pressure electric-type pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418585.7A CN108458817A (en) | 2018-05-04 | 2018-05-04 | A kind of novel pressure electric-type pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108458817A true CN108458817A (en) | 2018-08-28 |
Family
ID=63215124
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810418585.7A Pending CN108458817A (en) | 2018-05-04 | 2018-05-04 | A kind of novel pressure electric-type pressure sensor |
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| Country | Link |
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| CN (1) | CN108458817A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824678U (en) * | 2014-05-20 | 2014-09-10 | 安徽理工大学 | Piezoelectric induction type dynameter for boxing |
| CN107291301A (en) * | 2017-07-28 | 2017-10-24 | 苏州芯沃科电子科技有限公司 | Piezoelectric three dimension touch control input module and its driving method |
| CN107300433A (en) * | 2017-06-19 | 2017-10-27 | 重庆大学 | A kind of method that utilization piezoelectric force transducer measures static force |
-
2018
- 2018-05-04 CN CN201810418585.7A patent/CN108458817A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824678U (en) * | 2014-05-20 | 2014-09-10 | 安徽理工大学 | Piezoelectric induction type dynameter for boxing |
| CN107300433A (en) * | 2017-06-19 | 2017-10-27 | 重庆大学 | A kind of method that utilization piezoelectric force transducer measures static force |
| CN107291301A (en) * | 2017-07-28 | 2017-10-24 | 苏州芯沃科电子科技有限公司 | Piezoelectric three dimension touch control input module and its driving method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180828 |
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| WD01 | Invention patent application deemed withdrawn after publication |