CN108036804A - A kind of device adjusted for resistance strain gage output - Google Patents
A kind of device adjusted for resistance strain gage output Download PDFInfo
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- CN108036804A CN108036804A CN201810015675.1A CN201810015675A CN108036804A CN 108036804 A CN108036804 A CN 108036804A CN 201810015675 A CN201810015675 A CN 201810015675A CN 108036804 A CN108036804 A CN 108036804A
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- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000011888 foil Substances 0.000 claims description 20
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000036581 peripheral resistance Effects 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000032683 aging Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 238000012517 data analytics Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention discloses a kind of device adjusted for resistance strain gage output, can reduce drift and the error of detection signal, and smaller, the stability with higher is influenced by resistance strain gage aging.The device includes：Sequentially connected resistance strain gage, measuring circuit, amplifier, analog to digital conversion circuit, microprocessor and the DC power supply for described device power supply；Measuring circuit has the fixed resistance value resistance in parallel with the lead of resistance strain gage, and the resistance value adjustable resistance connected with fixed resistance value resistance, for exporting corresponding voltage signal according to the resistance value of resistance strain gage；Microprocessor is used for the magnitude of voltage of the resistance value and DC power supply according to fixed resistance value resistance and resistance value adjustable resistance, calculate the resistance value of the equivalent resistance of resistance strain gage, measurement data corresponding with resistance strain gage deformation quantity is generated according to the change in resistance of equivalent resistance, and exports or store produced measurement data.
Description
Technical field
The present invention relates to resistance-strain sensing measurement technical field, more particularly to a kind of resistance strain gage that is used for export adjusting
Device.
Background technology
Resistance strain gage is a kind of common sensing element.Pulling force that resistance strain gage is subject to, pressure, moment of torsion, displacement plus
When physical quantity changes, its resistance can also produce corresponding change for speed, temperature, by the measurement to its resistance and defeated
Go out, so as to obtain the measured value of corresponding physical quantity.
Resistance strain gage common in the art has metal strain plate and semiconductor gauge.Metal strain plate is by health
Copper wire or nickel filament are coiled into palisade, or with very thin metal foil are etched into palisade and are clipped in two layers of heat insulating lamella and be made, then with plating
Silver-copper wire is connected to resistor disc lead with foil gauge wire grid, is examined by the change of resistance value caused by wire generation deformation
Survey the size of stress.Semiconductor gauge be using monocrystalline silicon piezoresistive effect made of a kind of sensing element, pass through semiconductor
Material produces deformation and causes change in resistance to detect the physical quantitys such as pressure suffered by foil gauge, pulling force.
Since resistance strain gage is there are mechanical hysteresis, will not restore to the original state at once after being stressed, resistance value
Initial value is not returned to, therefore drift necessarily occurs in output valve in detection process repeatedly；Meanwhile resistance strain gage is deposited
In certain stretching service life, after certain number has been used, the initial resistivity value of resistance strain gage can be in original detection
In the range of drift about, more than the detection range of measuring circuit, cause no data to export.Moreover, the output signal of foil gauge is also
It can be affected with the change of temperature, produce temperature drift.
Application publication number is that the Chinese invention patent application of CN105675184A discloses a kind of silicon foil gauge bridge circuit
The compensation method of zero temperature drift, it to strain resistor at multi-temperature point by carrying out data acquisition, to estimate series electrical
Resistance value and parallel resistance value.Although the influence of temperature drift can be reduced to a certain extent, yet with the machinery of foil gauge
Hysteresis quality, when the bridge balance of the program, the output of the hardware compensating circuit diagram still has the null offset that can not ignore.
If as shown in Figure 1, measure stress repetition situation, the strain resistor R of program measurement in time tASignal with can be because of foil gauge
There are △ R for mechanical hysteresisADrift.Also, repeatedly it can further increase output signal because of foil gauge aging after measurement
Drift value, reduce the accuracy of testing result.
The content of the invention
An object of the present invention at least that, for how overcoming the above-mentioned problems of the prior art, there is provided a kind of
The device adjusted for resistance strain gage output, can reduce drift and the error of detection signal, and old by resistance strain gage
The influence of change is smaller, has the stability of higher, can be used for the accuracy of detection of output signal for improving various resistance strain gages.
To achieve these goals, the technical solution adopted by the present invention includes following aspects.
A kind of device adjusted for resistance strain gage output, it is characterised in that including：Sequentially connected resistance-strain
Piece, measuring circuit, amplifier, analog to digital conversion circuit, microprocessor and the DC power supply for described device power supply；
Wherein, it (can be resistance described later that the measuring circuit, which has the first resistor in parallel with the lead of resistance strain gage,
It is worth adjustable resistance or fixed resistance value resistance), and the second resistance connected with first resistor (can be that resistance value described later is adjustable
Resistance or fixed resistance value resistance), the resistance value of first resistor is less than the minimum value of the equivalent resistance of resistance strain gage so that measurement
Circuit exports corresponding voltage signal according to the resistance value of resistance strain gage；
The amplifier, for the amplitude amplification for the voltage signal for exporting measuring circuit；Analog to digital conversion circuit, for inciting somebody to action
The output signal of amplifier is converted into digital signal；
The microprocessor is used for the magnitude of voltage of the resistance value and DC power supply according to first resistor and second resistance, calculates
The resistance value of the equivalent resistance of resistance strain gage, generates corresponding with resistance strain gage deformation quantity according to the change in resistance of equivalent resistance
Measurement data, and export or store produced measurement data.
Preferably, the measuring circuit includes a resistance value adjustable resistance and a fixed resistance value resistance；
Wherein, the lead of resistance strain gage one end is connected to DC power supply, and the other end is connected with resistance value adjustable resistance；Resistance value
One end of adjustable resistance is connected with resistance strain gage, other end ground connection；Fixed resistance value resistance is in parallel with the lead of resistance strain gage；
The voltage at resistance value adjustable resistance both ends is exported to amplifier as voltage signal.
Preferably, the measuring circuit includes a resistance value adjustable resistance and three fixed resistance value resistance；
Wherein, the lead of resistance strain gage one end is connected to DC power supply, and the other end is connected with the first fixed resistance value resistance
After be grounded；One end of resistance value adjustable resistance is connected to DC power supply, and the other end connects with the second fixed resistance value resistance and is followed by ground；The
Three fixed resistance value resistance are in parallel with the lead of resistance strain gage；By the first fixed resistance value resistance and the second fixed resistance value resistance and ground
Between voltage difference exported as voltage signal to amplifier.
Preferably, described device includes two resistance strain gages, the measuring circuit include a resistance value adjustable resistance and
Three fixed resistance value resistance；
Wherein, the lead of first resistor foil gauge one end is connected to DC power supply, the other end and the first fixed resistance value resistance
It is grounded after series connection；One end of resistance value adjustable resistance is connected to DC power supply, and the other end is connected with the second fixed resistance value resistance and is followed by
Ground；3rd fixed resistance value resistance is in parallel with the lead of resistance strain gage；Second resistance foil gauge and the second fixed resistance value resistance are simultaneously
Connection；Voltage difference between first fixed resistance value resistance and the second fixed resistance value resistance and ground is exported to amplification as voltage signal
Device.
Preferably, resistance strain gage deform upon and the amplitude of voltage signal change beyond amplifier input voltage model
When enclosing, the resistance value for adjusting resistance value adjustable resistance changes the amplitude of voltage signal with the input voltage range of coincidence amplifier.
Preferably, the amplifier uses the low-noise amplifier AD8634 of ADI companies, it is defeated with 9.7MHz bandwidth
Entering voltage noise density is
Preferably, analog to digital conversion circuit is formed with peripheral resistance, capacitance using motorola inc's MC14433 chips.
Preferably, the microprocessor uses 16 RISC microcontrollers MSP-430F413 of TI companies.
Preferably, the resistance strain gage be using include flexible resistor made of the polymer composite material of silica gel answer
Become piece.
Preferably, the equivalent resistance excursion of the flexible resistor foil gauge is 100 Ω~1M Ω.
In conclusion by adopting the above-described technical solution, the present invention at least has the advantages that：
By first, second fixed resistance value resistance and resistance value adjustable resistance, the electricity that measuring circuit can be not only exported
The amplitude of pressure signal is adjusted to the input voltage range of coincidence amplifier, so that reduce drift and the error of detection signal, and
Can be after resistance strain gage multi-drawing aging, when the equivalent resistance change curve of resistance strain gage changes, by changing
The resistance value for becoming resistance value adjustable resistance keeps the stability of measurement result, avoids the influence of resistance strain gage aging.
Brief description of the drawings
Fig. 1 is the strain resistor signal of one of prior art measurement, and there are △ R for itADrift.
Fig. 2 is the structure diagram for being used for the device that resistance strain gage output is adjusted according to embodiments of the present invention.
Fig. 3 is the structure diagram of measuring circuit according to an embodiment of the invention.
Fig. 4 is the voltage signal magnitude change schematic diagram of one of prior art output.
Fig. 5 is the voltage signal magnitude change schematic diagram of the output of measuring circuit according to embodiments of the present invention.
Fig. 6 is the structure diagram of measuring circuit according to another embodiment of the present invention.
Fig. 7 is the structure diagram of the measuring circuit of another embodiment according to the present invention.
Embodiment
With reference to the accompanying drawings and embodiments, the present invention will be described in further detail, so that the purpose of the present invention, technology
Scheme and advantage are more clearly understood.It should be appreciated that specific embodiment described herein is only to explain the present invention, and do not have to
It is of the invention in limiting.
Fig. 2 shows the device according to an embodiment of the invention adjusted for resistance strain gage output.The embodiment
Device includes sequentially connected resistance strain gage, measuring circuit, amplifier, amplitude modulation circuit, analog to digital conversion circuit, microprocessor
Device, communication interface, and the DC power supply for described device power supply.
Wherein, measuring circuit, has the fixed resistance value resistance in parallel with the lead of resistance strain gage, and and fixed resistance value
The resistance value adjustable resistance of resistance series connection, for exporting corresponding voltage signal according to the resistance value of resistance strain gage.
Amplifier, for the amplitude of voltage signal to be amplified to the input range of amplitude modulation circuit, it is for instance possible to use
The low-noise amplifier AD8634 of ADI companies, it is with 9.7MHz bandwidth, input voltage noise density
Amplitude modulation circuit, including triode and LC resonance circuit, for the constant amplitude produced by high frequency carrier oscillator
Carrier wave carries out nonlinear frequency transformation to the voltage signal of input, and exports amplitude-modulated wave.However, amplitude modulation circuit is optional
, in various embodiments, can be by setting the gain coefficient of amplifier that the amplitude of voltage signal is amplified to modulus
Within the input range of conversion circuit.
Analog to digital conversion circuit, for amplitude-modulated wave to be converted to digital signal.It is for instance possible to use motorola inc
MC14433 chips form analog to digital conversion circuit with peripheral resistance, capacitance.
Microprocessor, the voltage for resistance value and DC power supply according to fixed resistance value resistance and resistance value adjustable resistance
Value, calculates the resistance value of the equivalent resistance of resistance strain gage, and according to the generation of the change in resistance of equivalent resistance and resistance strain gage shape
The corresponding measurement data of variable.For example, microprocessor can use 16 RISC microcontrollers MSP-430F413 of TI companies.
Can be by the display that is connected with microprocessor (for example, being set with resistance strain gage for the measurement data of generation
The LED display for the structure that sets as one) directly display, can also be by the communication interface that is connected with microprocessor by the survey of generation
Data sending is measured to other equipment, such as data analytics server, to be further processed or store to measurement data.
Fig. 3 shows the structure diagram of measuring circuit according to an embodiment of the invention.Wherein, resistance strain gage etc.
Effect resistance is expressed as Rx；The lead of resistance strain gage one end is connected to DC power supply VCC, and the other end connects with resistance value adjustable resistance R2
Connect；One end of resistance value adjustable resistance R2 is connected with resistance strain gage, other end ground connection；Fixed resistance value resistance R1 and resistance strain gage
Lead it is in parallel；The voltage Uo at resistance value adjustable resistance R2 both ends is exported to amplifier as voltage signal.In other embodiment
In, resistance R2 can also be arranged to the resistance of resistance value fixation, and export the voltage at R1 both ends as voltage signal to amplification
Device.
In the application for various variety classes resistance strain gages, shape can not occur according to resistance strain gage first
Nominal equivalent resistance under the conditions of change selects the fixed resistance value resistance R1 less than the equivalent resistance so that R1 resistance values are all the time
Less than Rx, avoiding foil gauge change in resistance from arriving greatly very much can not measure；The initial resistance value of resistance value adjustable resistance R2 can be according to fixation
The resistance value of valued resistor R1 and the input voltage range of amplifier are set, to obtain the input voltage range of coincidence amplifier
Voltage signal；When resistance strain gage deforms upon and the change of the amplitude of voltage signal is beyond the input voltage range of amplifier,
The resistance value of resistance value adjustable resistance R2 is adjusted to change the amplitude of voltage signal Uo so that it still conforms to the input voltage model of amplifier
Enclose (for example, -14.5V~+14.5V).Resistance value adjustable resistance referred to herein is can be seen that from this process, when referring to that production is completed,
, can be according to potentiometer (for example, digital regulation resistance can be used since foil gauge can be with temperature drift or other decay
MCP41XX) adjusted into Mobile state.
For example, for resistance strain gage in higher sensitivity (for example, using the polymer composite material system for including silica gel
Into flexible resistor foil gauge), the scope of its equivalent resistance change △ R can reach 100 Ω~1M Ω.On the one hand, this meeting
Cause the range of drift that the voltage signal magnitude that measuring circuit exports changes △ U very wide, and the input voltage range of amplifier has
Limit, can not amplify the voltage of input exactly；On the other hand, less situation is changed in equivalent resistance change △ R
Under, △ U are too small, may result in amplifier circuit without any output.As shown in figure 4, in the range of t0~t1, △ U are less than
The minimum input voltage of amplifier, causes no signal to export；In the range of t2~t3, △ U exceed can detecting for amplifier
The voltage range arrived, causes no signal to export.By the above embodiment of the present invention, on the one hand by parallel with resistance strain gage
Fixed resistance value resistance the magnitude of voltage at resistance strain gage both ends is maintained at metastable value, and further pass through and resistance be set
The amplitude of voltage signal Uo is adjusted in the input voltage range of amplifier by value adjustable resistance, so as to reduce detection signal
Drift and error.Its voltage signal magnitude exported changes △ U as shown in figure 5, it has stabilization in the range of t0~t1
Output.
Fig. 6 shows the structure diagram of bridge-type measuring circuit according to another embodiment of the present invention.Wherein, resistance-strain
The lead of piece one end is connected to DC power supply VCC, and the other end is grounded after connecting with the first fixed resistance value resistance R4；Resistance value adjustable electric
One end of resistance R2 is connected to DC power supply VCC, and the other end is grounded after connecting with the second fixed resistance value resistance R3；3rd fixed resistance value
Resistance R1 is in parallel with the lead of resistance strain gage；By between the first fixed resistance value resistance R4 and the second fixed resistance value resistance R3 and ground
Voltage difference exported as voltage signal Uo to amplifier.
Fig. 7 shows the structure diagram of the full-bridge type measuring circuit of another embodiment according to the present invention.Its with shown in Fig. 6
The difference of circuit is, which includes two resistance strain gages, and the equivalent resistance of resistance strain gage is Rx and Ry, second
Fixed resistance value resistance R3 is in parallel with Ry.
In above-described embodiment, by the first to the 3rd fixed resistance value resistance and resistance value adjustable resistance, it will can not only survey
The amplitude for measuring the voltage signal Uo of circuit output is adjusted to the input voltage range of coincidence amplifier, so as to reduce detection signal
Drift and error, and can be after resistance strain gage multi-drawing aging, the equivalent resistance change curve hair of resistance strain gage
During changing, the stability of measurement result is kept by varying the resistance value of resistance value adjustable resistance, avoids resistance strain gage aging
Influence.
The detailed description of the above, the only specific embodiment of the invention, rather than limitation of the present invention.Correlation technique
The technical staff in field is not in the case where departing from the principle and scope of the present invention, various replacements, modification and the improvement made
It should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. device adjusted for resistance strain gage output, it is characterised in that including：Sequentially connected resistance strain gage, Measuring circuit, amplifier, analog to digital conversion circuit, microprocessor and the DC power supply for described device power supply；Wherein, the measuring circuit has the first resistor in parallel with the lead of resistance strain gage, and connects with first resistor Second resistance, the resistance value of first resistor is less than the minimum value of the equivalent resistance of resistance strain gage so that measuring circuit is according to resistance The resistance value of foil gauge exports corresponding voltage signal；The amplifier, for the amplitude amplification for the voltage signal for exporting measuring circuit；Analog to digital conversion circuit, for that will amplify The output signal of device is converted into digital signal；The microprocessor is used for the magnitude of voltage of the resistance value and DC power supply according to first resistor and second resistance, calculates resistance The resistance value of the equivalent resistance of foil gauge, measures according to the generation of the change in resistance of equivalent resistance is corresponding with resistance strain gage deformation quantity Data, and export or store produced measurement data.
- 2. device according to claim 1, it is characterised in that the measuring circuit includes a resistance value adjustable resistance and one A fixed resistance value resistance；Wherein, the lead of resistance strain gage one end is connected to DC power supply, and the other end is connected with resistance value adjustable resistance；Resistance value is adjustable One end of resistance is connected with resistance strain gage, other end ground connection；Fixed resistance value resistance is in parallel with the lead of resistance strain gage；Will resistance The voltage at value adjustable resistance both ends is exported to amplifier as voltage signal.
- 3. device according to claim 1, it is characterised in that the measuring circuit includes a resistance value adjustable resistance and three A fixed resistance value resistance；Wherein, the lead of resistance strain gage one end is connected to DC power supply, and the other end is connected with the first fixed resistance value resistance and is followed by Ground；One end of resistance value adjustable resistance is connected to DC power supply, and the other end connects with the second fixed resistance value resistance and is followed by ground；3rd is solid The lead for determining valued resistor with resistance strain gage is in parallel；By between the first fixed resistance value resistance and the second fixed resistance value resistance and ground Voltage difference exported as voltage signal to amplifier.
- 4. device according to claim 1, it is characterised in that described device includes two resistance strain gages, the measurement Circuit includes a resistance value adjustable resistance and three fixed resistance value resistance；Wherein, the lead of first resistor foil gauge one end is connected to DC power supply, and the other end is connected with the first fixed resistance value resistance After be grounded；One end of resistance value adjustable resistance is connected to DC power supply, and the other end connects with the second fixed resistance value resistance and is followed by ground；The Three fixed resistance value resistance are in parallel with the lead of resistance strain gage；Second resistance foil gauge and the second fixed resistance value resistor coupled in parallel；Will Voltage difference between first fixed resistance value resistance and the second fixed resistance value resistance and ground is exported to amplifier as voltage signal.
- 5. device according to any one of claim 1 to 4, it is characterised in that resistance strain gage deform upon and electricity When pressing the amplitude change of signal beyond the input voltage range of amplifier, the resistance value for adjusting resistance value adjustable resistance is believed to change voltage Number amplitude with the input voltage range of coincidence amplifier.
- 6. device according to any one of claim 1 to 4, it is characterised in that the amplifier is low using ADI companies Noise amplifier AD8634, it is with 9.7MHz bandwidth, input voltage noise density
- 7. device according to any one of claim 1 to 4, it is characterised in that using motorola inc's MC14433 cores Piece forms analog to digital conversion circuit with peripheral resistance, capacitance.
- 8. device according to any one of claim 1 to 4, it is characterised in that the microprocessor is using TI companies 16 RISC microcontrollers MSP-430F413.
- 9. device according to any one of claim 1 to 4, it is characterised in that the resistance strain gage is to use to include Flexible resistor foil gauge made of the polymer composite material of silica gel.
- 10. device according to claim 9, it is characterised in that the equivalent resistance change of the flexible resistor foil gauge Scope is 100 Ω~1M Ω.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015675.1A CN108036804B (en) | 2018-01-08 | 2018-01-08 | Device for adjusting output of resistance strain gauge |
| PCT/CN2018/123167 WO2019134552A1 (en) | 2018-01-08 | 2018-12-24 | Elastic resistance strain gauge, preparation method therefor and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015675.1A CN108036804B (en) | 2018-01-08 | 2018-01-08 | Device for adjusting output of resistance strain gauge |
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| CN108036804A true CN108036804A (en) | 2018-05-15 |
| CN108036804B CN108036804B (en) | 2024-03-01 |
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| CN201810015675.1A Active CN108036804B (en) | 2018-01-08 | 2018-01-08 | Device for adjusting output of resistance strain gauge |
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| CN110595885A (en) * | 2019-09-06 | 2019-12-20 | 鞍钢股份有限公司 | Dynamic load signal acquisition device and method |
| CN113655729A (en) * | 2021-10-20 | 2021-11-16 | 北京创米智汇物联科技有限公司 | Control device, control method, control system, and storage medium |
| CN113655729B (en) * | 2021-10-20 | 2021-12-14 | 北京创米智汇物联科技有限公司 | Control device, control method, control system, and storage medium |
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