CN206920051U - Pressure sensor device - Google Patents
Pressure sensor device Download PDFInfo
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- CN206920051U CN206920051U CN201720733798.XU CN201720733798U CN206920051U CN 206920051 U CN206920051 U CN 206920051U CN 201720733798 U CN201720733798 U CN 201720733798U CN 206920051 U CN206920051 U CN 206920051U
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- pressure sensor
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- elastic equilibrium
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Abstract
The utility model discloses a kind of pressure sensor device, it is made up of guard ring, weighing plate, the first pad, the second pad, the 3rd pad, pressure sensor, base, power supply, power supply E1, power supply E1, voltmeter V1, voltmeter V2 and registration device, wherein pressure sensor is made up of elastic equilibrium beam, straingauge, elastic equilibrium beam side is fixed by the second pad and base, elastic equilibrium beam opposite side is fixed by the first pad and weighing plate, 3rd pad is fixed on base, and keeps a fixed gap with elastic equilibrium beam；Straingauge is pasted onto elastic equilibrium beam centre position.This pressure sensor includes two elastic equilibrium beams and is installed on by Central Symmetry in device, eliminate the vibration because caused by being placed weighed object, the registration that can be stablized in 1s, two pressure sensors are installed by Central Symmetry simultaneously, 2 times of range is not only expanded, also it is more beneficial for uniform stressed so that measurement accuracy is further enhanced.
Description
Technical field
The present invention relates to sensor, and in particular to a kind of pressure sensor device.
Background technology
Sensor is the important component of modern measure and control system, and pressure sensor characteristic is all studied by each colleges and universities
And its application experiment, as physics basic experiment, high-precision pressure sensor is widely used in the occasions such as scientific research, teaching.But
During high-precision weighing, weight is placed on the body vibration that can cause weighing plate on weighing plate, and the vibration of weighing plate can cause registration
It is unstable, it is necessary to wait the long period (10s or so) that reading could be stablized, because high-precision pressure sensor range is smaller,
Maloperation in practical operation be present, can cause elastic equilibrium beam that inelastic strain occurs, so as to produce larger error.
The content of the invention
The purpose of the present invention is that design one is easy to operate, and precision is high, and non-damageable teaching, scientific research are passed with high-precision pressure
Induction device.
The technical solution adopted by the present invention is：A kind of pressure sensor device, by weighing plate, the pad of two panels first, two panels
Two pads, the pad of two panels the 3rd, first pressure sensor, second pressure sensor, base, power supply E1, power supply E1, voltmeter
V1, voltmeter V2 and registration device are formed, wherein first pressure sensor by four straingauges R1, R2, R3 and R4 and
First elastic equilibrium beam is formed, and a side bottom of the first elastic equilibrium beam is fixed on base by the second pad, opposite side top
Portion is fixed with weighing plate by the first pad, and wherein R1, R3 is located at the first elastic equilibrium beam upper surface, and R2, R4 are located at the first bullet
Sexual balance beam lower surface, R1 and R4 one end and power supply E1 positive pole and company, the other end is in parallel with voltmeter V1 positive pole, R2 and
R3 one end and power supply E1 negative pole and company, the other end is in parallel with voltmeter V1 negative pole, and second pressure sensor should by four
Become resistor disc R5, R6, R7 and R8 and the second elastic equilibrium beam composition, a side bottom of the second elastic equilibrium beam pass through another second
Pad is fixed on base, is fixed with weighing plate by another first pad at the top of opposite side, wherein R5, R7 are positioned at the second elasticity
Equalizer bar upper surface, R6, R8 are located at the second elastic equilibrium beam lower surface, R5 and R8 one end and power supply E2 positive pole and company, separately
One end is in parallel with voltmeter V2 positive pole, R6 and R7 one end and power supply E2 negative pole and company, and the other end is negative with voltmeter V2's
Extremely in parallel, registration device connection voltmeter V1, voltmeter V2, first pressure sensor press Central Symmetry with second pressure sensor
Principle is set, and the 3rd pad is fixed on base, and keeps a fixed gap with the first or second elastic equilibrium beam.
Preferably, the resistance R initial values of the straingauge R1-8 are equal.
Preferably, in addition to guard ring, the guard ring are vertically installed in base outer rim, its highly a little higher than weighing plate.
Preferably, power supply E1, E2 is high precision electro potential source, output voltage values E.
Preferably, the first pressure sensor, second pressure sensor can directly use N430 type pressure sensor moulds
Block, the parameter of two pressure sensors are identical.
Switch on power during measurement, voltmeter V1 with voltmeter V2 is measurable before and after placement force obtains two voltages
Value, the preceding initial reading for first recording voltmeter V1 and voltmeter V2 of counterweight (F0) is not placed, is re-recorded down after placing standard test weight
Voltmeter V1 and voltmeter V2 reading, obtain the absolute value of front and rear reading difference twice | U1 |, | U2 |, coefficient A is calculated
=E*F0/ (| U1 |+| U2 |), A is the conversion coefficient of pressure sensor, is built in inside registration device, its value can pass through standard
Counterweight carrys out calibration.
Registration device by relational expression F=E*A/ (| U1 |+| U2 |) the big of pressure F on weighing plate can be directly displayed
It is small.
The special innovation of the present apparatus is to use two pressure sensors, byUnderstand, two elasticity are put down
On the one hand Heng Liang increases stiffness factor, sensor, which will weigh the disc vibration cycle, to be reduced, and the vibration period reduces, under equal amplitude with
Windage damping increase, can obtain stably measured value in a short time, while two elastic equilibrium beams are pacified by Central Symmetry
Dress, has not only expanded 2 times of range, has also been more beneficial for uniform stressed, identical weight lower-weighing disk amplitude is smaller, and measurement accuracy obtains
Improved to further, compared with single pressure sensor, measured value stabilization time also improves an order of magnitude.Secondly the present apparatus
In place of also multinomial original creation, such as reasonable space is set between pad and elastic equilibrium beam, does not contact, exceedes in regulation range
Instrument provide range when both contact, can prevent elastic equilibrium beam occur inelastic strain, the present apparatus design protective cover be higher than
It weighing plate plane, can be effectively prevented from that palm or other weights are pressed in into the first-class maloperation of weighing plate in operation.
Brief description of the drawings
Fig. 1 is the side sectional view of the pressure sensor device of the present invention.
Fig. 2 is the top view of the pressure sensor device of the present invention.
Fig. 3 is that the pressure sensor device of the present invention is taken away the top view after weighing plate.
Fig. 4 is the circuit connecting mode of the present invention.
When Fig. 5 is weighing plate stress, the voltage change schematic diagram of four straingauges of first pressure sensor.
The specific embodiment of the invention is described further below in conjunction with the accompanying drawings.
Embodiment
Embodiment 1
A kind of pressure sensor device, by guard ring 1, weighing plate 2, the first pad of two panels 3, the second pad of two panels 4, two panels
Three pads 5, first pressure sensor 6, second pressure sensor 7, base 8, power supply E1, power supply E1, voltmeter V1, voltmeter V2
Formed with registration device 9, wherein first pressure sensor is flat by four straingauges R1, R2, R3 and R4 and the first elasticity
Weighing apparatus beam 10 is formed, and a side bottom of the first elastic equilibrium beam 10 is fixed on base 8 by the second pad 4, logical at the top of opposite side
Cross the first pad 3 and be fixed with weighing plate 2, wherein R1, R3 is located at the upper surface of the first elastic equilibrium beam 10, and R2, R4 are located at the first bullet
The lower surface of sexual balance beam 10, R1 and R4 one end and power supply E1 positive pole and company, the other end is in parallel with voltmeter V1 positive pole,
R2 and R3 one end and power supply E1 negative pole and company, the other end is in parallel with voltmeter V1 negative pole, and second pressure sensor 7 is by four
Individual straingauge R5, R6, R7 and R8 and the second elastic equilibrium beam 11 form, and a side bottom of the second elastic equilibrium beam 11 passes through
Another second pad 4 is fixed on base, and weighing plate, wherein R5, R7 position are fixed with by another first pad 3 at the top of opposite side
In the second elastic equilibrium beam upper surface, R6, R8 are located at the second elastic equilibrium beam lower surface, and R5 and R8 one end and power supply E2 are just
Pole and company, the other end is in parallel with voltmeter V2 positive pole, R6 and R7 one end and power supply E2 negative pole and company, the other end and voltage
The negative pole parallel connection of Table V 2, registration device connection voltmeter V1, voltmeter V2, first pressure sensor and second pressure sensor,
The pad of two panels first, the pad of two panels second, the pad of two panels the 3rd are set by Central Symmetry principle, and the 3rd pad 5 is fixed
A fixed gap is kept on base, and with the first or second elastic equilibrium beam 11.Guard ring 1 is made of lucite, in it
Footpath 120mm, external diameter 130mm, wall thickness 5mm, height 50mm.Weighing plate 2 is made of lucite, its radius 59mm, thickness
5mm.Pressure sensor 6 uses N430 type pressure sensors, and its long 80mm, wide 12.7mm, high 12.7mm, power supply 8 is using output
Voltage constant is 5.0000V standard high-precision power.
Device is switched on power during measurement, voltmeter V1 and voltmeter V2 are recorded first before not placing standard test weight (F0)
Initial reading, re-record lower voltmeter V1 and voltmeter V2 reading after placing 1000g standard test weights, reading twice before and after obtaining
The absolute value of difference | U1 |=2.4988mV, | U2 |=2.5026mV, obtain coefficient A=E*F0/ (| U1 |+| U2 |), placing
Pressure fore-and-aft survey obtains the absolute value of two magnitude of voltage differences | U1 |=1.3462mV, | U2 |=1.3486mV, pass through relation
Formula F=E*A/ (| U1 |+| U2 |) to obtain pressure size be 538.81g.
In contrast, by the device that a N430 type pressure sensor is formed after 1000g standard test weights are placed voltmeter
After display 5.14XXg (X represents that numerical value beating heart moves), 10s, voltmeter shows 5.142Xg；The present apparatus is placing 1000g marks
After quasi- counterweight 1s, voltmeter V1 and voltmeter V2 is that cocoa stably shows after decimal point four, illustrates that present apparatus stability is good,
Measurement accuracy is high.
Claims (4)
- A kind of 1. pressure sensor device, by weighing plate, the pad of two panels first, the pad of two panels second, the pad of two panels the 3rd, the first pressure Force snesor, second pressure sensor, base, power supply E1, power supply E2, voltmeter V1, voltmeter V2 and registration device are formed, Wherein first pressure sensor is made up of four straingauges R1, R2, R3 and R4 and the first elastic equilibrium beam, and the first elasticity is flat A Heng Liang side bottom is fixed on base by the second pad, and weighing plate is fixed with by the first pad at the top of opposite side, its Middle R1, R3 are located at the first elastic equilibrium beam upper surface, and R2, R4 are located at the first elastic equilibrium beam lower surface, R1 and R4 one end with Power supply E1 positive pole and company, the other end is in parallel with voltmeter V1 positive pole, R2 and R3 one end and power supply E1 negative pole and company, separately One end is in parallel with voltmeter V1 negative pole, and second pressure sensor is by four straingauges R5, R6, R7 and R8 and the second elasticity Erecting is into a side bottom of the second elastic equilibrium beam is fixed on base by another second pad, logical at the top of opposite side Cross another first pad and be fixed with weighing plate, wherein R5, R7 is located at the second elastic equilibrium beam upper surface, and R6, R8 are located at the second bullet Sexual balance beam lower surface, R5 and R8 one end and power supply E2 positive pole and company, the other end is in parallel with voltmeter V2 positive pole, R6 and R7 one end and power supply E2 negative pole and company, the other end is in parallel with voltmeter V2 negative pole, registration device connection voltmeter V1, electricity Table V 2 is pressed, first pressure sensor is set with second pressure sensor by Central Symmetry principle, and the 3rd pad is fixed on bottom On seat, and a fixed gap is kept with the first or second elastic equilibrium beam.
- 2. pressure sensor device according to claim 1, it is characterised in that：At the beginning of the resistance R of the straingauge R1-8 Value is equal.
- 3. pressure sensor device according to claim 1 or 2, it is characterised in that：Also include guard ring, the guard ring hangs down Base outer rim directly is arranged at, its highly a little higher than weighing plate.
- 4. pressure sensor device according to claim 3, it is characterised in that：The first pressure sensor and second pressure Sensor is N430 type pressure sensors, and the parameter of two pressure sensors is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720733798.XU CN206920051U (en) | 2017-06-22 | 2017-06-22 | Pressure sensor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720733798.XU CN206920051U (en) | 2017-06-22 | 2017-06-22 | Pressure sensor device |
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| Publication Number | Publication Date |
|---|---|
| CN206920051U true CN206920051U (en) | 2018-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720733798.XU Active CN206920051U (en) | 2017-06-22 | 2017-06-22 | Pressure sensor device |
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| CN (1) | CN206920051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167271A (en) * | 2017-06-22 | 2017-09-15 | 南京南大光电工程研究院有限公司 | Pressure sensor device |
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2017
- 2017-06-22 CN CN201720733798.XU patent/CN206920051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167271A (en) * | 2017-06-22 | 2017-09-15 | 南京南大光电工程研究院有限公司 | Pressure sensor device |
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