CN106871935A - The digital integration module of data acquisition device - Google Patents
The digital integration module of data acquisition device Download PDFInfo
- Publication number
- CN106871935A CN106871935A CN201710139983.0A CN201710139983A CN106871935A CN 106871935 A CN106871935 A CN 106871935A CN 201710139983 A CN201710139983 A CN 201710139983A CN 106871935 A CN106871935 A CN 106871935A
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- China
- Prior art keywords
- resistor
- operational amplifier
- resistance
- electric capacity
- data acquisition
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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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
- G01D3/036—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses the digital integration module of data acquisition device, including operational amplifier, first resistor, second resistance, 3rd resistor, the 4th resistance, the second electric capacity, the 4th electric capacity, first resistor one end is connected as data acquisition signal input, the first resistor other end with the inverting input of operational amplifier；4th resistance one end is connected with the positive input of operational amplifier, its other end ground connection；Second resistance one end is connected on the circuit that first resistor is connected with operational amplifier, and its other end is connected with 3rd resistor；The other end at the relative connection second resistance end of 3rd resistor is connected to the output end of operational amplifier, and the output end of operational amplifier is the signal output part of digital integrator.The present invention sets the first electric capacity, second resistance, 3rd resistor, and two resistance constitute degeneration factor to direct current signal, can preferably suppress the noise of the drift of zero point and the drift generation of temperature, greatly improves the certainty of measurement of data collection station.
Description
Technical field
The present invention relates to integrator, and in particular to the digital integration module of data acquisition device.
Background technology
Because the requirement of data collection station certainty of measurement is very high, so using digital integrator.But accumulating in theory
The performance of parallel circuit model very well, can better react transient signal.But there is the phenomenon of " integrator drift ", product in device
Noise is generated after point, and it is more sensitive to temperature, therefore during real work, its certainty of measurement will be limited by the performance of device.
In actual motion, operational amplifier and electric capacity are not preferable devices, when input signal is zero, the output electricity of integrator
Pressure is not equal to zero, here it is " integrator drift " phenomenon.Because the integrator working time is very long, offset voltage, offset current,
The factors such as bias current, temperature drift are constantly accumulated through electric capacity, and integrator drift is serious, by prolonged integration, not only make survey
Amount error increase, and the phenomenon of integration saturation occurs, make the integrator cannot normal work.
The content of the invention
The technical problems to be solved by the invention are the deficiencies of available data acquisition terminal, it is therefore intended that provide data acquisition
The digital integration module of device, solves the problems, such as that data collection station certainty of measurement is not high.
The present invention is achieved through the following technical solutions：
The digital integration module of data acquisition device, including operational amplifier, first resistor, second resistance, 3rd resistor,
4th resistance, the second electric capacity, the 4th electric capacity, described first resistor one end is used as data acquisition signal input, and first resistor is another
One end is connected with the inverting input of operational amplifier；Described 4th resistance one end connects with the positive input of operational amplifier
Connect, its other end ground connection；Described second resistance one end is connected on the circuit that first resistor is connected with operational amplifier, and its is another
End is connected with 3rd resistor；The other end at the relative connection second resistance end of the 3rd resistor is connected to the output of operational amplifier
End, the output end of operational amplifier is the signal output part of digital integrator；Described second electric capacity one end is connected to operation amplifier
The negative power end of device, its other end ground connection；Described 4th electric capacity one end is connected to the positive power source terminal of operational amplifier, its other end
Ground connection.The purpose of the 4th electric capacity is to stablize operational amplifier and reduction noise.
Further, the digital integration module of data acquisition device, also including the 3rd electric capacity, described 3rd electric capacity one end connects
It is connected on the circuit that second resistance is connected with 3rd resistor, its other end ground connection.The setting of the 3rd electric capacity can make voltage more stable.
Further, the digital integration module of data acquisition device, also including the first electric capacity, one end of first electric capacity
It is connected on the circuit that first resistor is connected with second resistance, its other end is connected to what 3rd resistor was connected with operational amplifier
On circuit.
Further, the operational amplifier uses OPA704.
The present invention compared with prior art, has the following advantages and advantages：The present invention sets the first electric capacity, second
Resistance, 3rd resistor, two resistance constitute degeneration factor to direct current signal, can preferably suppress drift and the temperature of zero point
Drift about the noise for producing, and greatly improves the certainty of measurement of data collection station.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Mark and corresponding parts title in accompanying drawing：
R1- first resistors, R2- second resistances, R3- 3rd resistors, the resistance of R4- the 4th, the electric capacity of C1- first, the electricity of C2- second
Hold, the electric capacity of C3- the 3rd, the electric capacity of C4- the 4th.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As shown in figure 1, the digital integration module of data acquisition device, including operational amplifier, first resistor R1, the second electricity
Resistance R2,3rd resistor R3, the 4th resistance R4, the second electric capacity C2, the 4th electric capacity C4, described first resistor R1 one end is adopted as data
Collection signal input part, the first resistor R1 other ends are connected with the inverting input of operational amplifier；Described 4th resistance R4 one end
It is connected with the positive input of operational amplifier, its other end ground connection；Described second resistance R2 one end is connected to first resistor R1
On the circuit being connected with operational amplifier, its other end is connected with 3rd resistor R3；The relative connections second of the 3rd resistor R3
The other end at resistance R2 ends is connected to the output end of operational amplifier, and the output end of operational amplifier is the signal of digital integrator
Output end；Described second electric capacity C2 one end is connected to the negative power end of operational amplifier, its other end ground connection；4th electric capacity
C4 one end is connected to the positive power source terminal of operational amplifier, its other end ground connection.
The digital integration module of data acquisition device, also including the 3rd electric capacity C3, described 3rd electric capacity C3 one end is connected to
On the circuit that second resistance R2 is connected with 3rd resistor R3, its other end ground connection.3rd electric capacity C3 is to give second resistance R2
And 3rd resistor R3 provides metastable voltage and sets.The digital integration module of data acquisition device, also including first
Electric capacity C1, one end of the first electric capacity C1 is connected on the circuit that first resistor R1 is connected with second resistance R2, its other end
It is connected on the circuit that 3rd resistor R3 is connected with operational amplifier.4th electric capacity C4 can stablize operational amplifier and reduction is made an uproar
Sound.
In order to stablize quiescent point, reduce the noise that integrator drift is produced, can be in the first electric capacity C1 two of integrator
The resistive element of simultaneously the United Nations General Assembly's resistance is held, resistance is constituted degeneration factor to direct current signal.The drift of zero point can preferably be suppressed
With the drift of temperature, that is, introduce inertial element, the effect of the 3rd electric capacity C3 is the AC signal of bypass output feedback, prevent its from
By backfeed loop entering signal input.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (4)
1. the digital integration module of data acquisition device, it is characterised in that including operational amplifier, first resistor (R1), second
Resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the second electric capacity (C2), the 4th electric capacity (C4), the first resistor (R1)
One end is connected as data acquisition signal input, first resistor (R1) other end with the inverting input of operational amplifier；Institute
State the 4th resistance (R4) one end to be connected with the positive input of operational amplifier, its other end ground connection；The second resistance (R2)
One end is connected on the circuit that first resistor (R1) is connected with operational amplifier, and its other end is connected with 3rd resistor (R3)；Institute
The other end for stating relative connection second resistance (R2) end of 3rd resistor (R3) is connected to the output end of operational amplifier, operation amplifier
The output end of device is the signal output part of digital integrator；Described second electric capacity (C2) one end is connected to the negative electricity of operational amplifier
Source, its other end ground connection；Described 4th electric capacity (C4) one end is connected to the positive power source terminal of operational amplifier, its another termination
Ground.
2. the digital integration module of data acquisition device according to claim 1, it is characterised in that also including the 3rd electric capacity
(C3), described 3rd electric capacity (C3) one end is connected on the circuit that second resistance (R2) is connected with 3rd resistor (R3), and its is another
End ground connection.
3. the digital integration module of data acquisition device according to claim 1, it is characterised in that also including the first electric capacity
(C1), one end of first electric capacity (C1) is connected on the circuit that first resistor (R1) is connected with second resistance (R2), and its is another
One end is connected on the circuit that 3rd resistor (R3) is connected with operational amplifier.
4. the digital integration module of data acquisition device according to claim 1, it is characterised in that the operational amplifier
Using OPA704.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139983.0A CN106871935A (en) | 2017-03-10 | 2017-03-10 | The digital integration module of data acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139983.0A CN106871935A (en) | 2017-03-10 | 2017-03-10 | The digital integration module of data acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106871935A true CN106871935A (en) | 2017-06-20 |
Family
ID=59169969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710139983.0A Pending CN106871935A (en) | 2017-03-10 | 2017-03-10 | The digital integration module of data acquisition device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106871935A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007029191A2 (en) * | 2005-09-08 | 2007-03-15 | Koninklijke Philips Electronics N. V. | Determination of low currents with high dynamic range for optical imaging |
| JP2012114535A (en) * | 2010-11-22 | 2012-06-14 | Rohm Co Ltd | Semiconductor device and electronic apparatus using the same |
| CN102981038A (en) * | 2012-11-23 | 2013-03-20 | 广东易事特电源股份有限公司 | Simplified sine wave sampling circuit |
| CN103323100A (en) * | 2013-05-24 | 2013-09-25 | 江阴市江凌科技有限公司 | Vibration amplitude measuring circuit |
| CN203933543U (en) * | 2014-05-17 | 2014-11-05 | 徐云鹏 | A kind of T-shaped filter amplification circuit of fast detector |
| CN106301266A (en) * | 2016-10-27 | 2017-01-04 | 山西师范大学 | A kind of Weak Electrical Signal in Plants amplifier |
| CN206556669U (en) * | 2017-03-10 | 2017-10-13 | 成都金广通科技有限公司 | The digital integrator of data collection station |
-
2017
- 2017-03-10 CN CN201710139983.0A patent/CN106871935A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007029191A2 (en) * | 2005-09-08 | 2007-03-15 | Koninklijke Philips Electronics N. V. | Determination of low currents with high dynamic range for optical imaging |
| JP2012114535A (en) * | 2010-11-22 | 2012-06-14 | Rohm Co Ltd | Semiconductor device and electronic apparatus using the same |
| CN102981038A (en) * | 2012-11-23 | 2013-03-20 | 广东易事特电源股份有限公司 | Simplified sine wave sampling circuit |
| CN103323100A (en) * | 2013-05-24 | 2013-09-25 | 江阴市江凌科技有限公司 | Vibration amplitude measuring circuit |
| CN203933543U (en) * | 2014-05-17 | 2014-11-05 | 徐云鹏 | A kind of T-shaped filter amplification circuit of fast detector |
| CN106301266A (en) * | 2016-10-27 | 2017-01-04 | 山西师范大学 | A kind of Weak Electrical Signal in Plants amplifier |
| CN206556669U (en) * | 2017-03-10 | 2017-10-13 | 成都金广通科技有限公司 | The digital integrator of data collection station |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |
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| RJ01 | Rejection of invention patent application after publication |