CN106556736A - A kind of multi-functional analyzer - Google Patents
A kind of multi-functional analyzer Download PDFInfo
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- CN106556736A CN106556736A CN201610939100.XA CN201610939100A CN106556736A CN 106556736 A CN106556736 A CN 106556736A CN 201610939100 A CN201610939100 A CN 201610939100A CN 106556736 A CN106556736 A CN 106556736A
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- module
- resistance
- analog switch
- circuit
- outfan
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- General Physics & Mathematics (AREA)
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Abstract
The invention provides a kind of multi-functional analyzer, belongs to current detection technology field.During it solves prior art, current detecting is not perfect enough, the narrow problem of detection range.This multi-functional analyzer, including main processor circuit, characterized in that, the multi-functional analyzer also includes calibration circuit, low-pass filter circuit, second amplifying circuit, wave trap and the reference current circuit being sequentially connected, the calibration circuit is connected with the main processor circuit.The multi-functional analyzer can be analyzed to multi-level electric current, and the suitability is wide.
Description
Technical field
The invention belongs to current detection technology field, is related to a kind of multi-functional analyzer.
Background technology
Multi-functional analyzer is primarily used to the current drain situation for analyzing battery-operated node, and we commonly use now
The peak value of ZigBee node operating current is typically divided to two kinds, can reach 200mA, can reach 40mA without PA with PA.
ZigBee node current drain in dormancy is substantially in uA ranks.So the design of our multi-functional analyzer needs
Cover the minimum and maximum current drain scope of Conventional monolithic machine.The minimum single-chip microcomputer of current drain is exactly TI's on the market at present
MSP430, limit low current are nA ranks.But the covering current range of multi-functional analyzer in the market is limited, no
NA, uA, mA can be covered and be analyzed even to the electric current of each rank such as A.
The content of the invention
There are the problems referred to above for existing technology in the present invention, it is proposed that it is even each to A that one kind can analyze nA, uA, mA
The multi-functional analyzer of individual level currents.
The present invention is realized by following technical proposal：A kind of multi-functional analyzer, including main processor circuit, its feature
It is that the multi-functional analyzer is also including the calibration circuit, low-pass filter circuit, second amplifying circuit, trap being sequentially connected
Device and reference current circuit, the calibration circuit are connected with the main processor circuit.
In a kind of above-mentioned multi-functional analyzer, the calibration circuit includes analog multiplexer and voltage conversion mould
Block, the main processor circuit send a PWM ripples of default dutycycle to analog multiplexer and pass through analog multiplexer
Break-make produce the 2nd PWM ripples, the voltage transformation module includes first resistor, second resistance, 3rd resistor and the 4th resistance,
The 2nd PWM ripples are converted into different calibration electricity by first resistor, second resistance, 3rd resistor and the 4th resistance respectively
Pressure.
In a kind of above-mentioned multi-functional analyzer, the low-pass filter circuit include the first analog switch module, second
Analog switch module and the first amplifier module, the outfan of the first analog switch module respectively with the second analog switch module
Input and the first amplifier module inverting input connection, the outfan of the second analog switch module with first transport
The input connection in the same direction of amplification module.
In a kind of above-mentioned multi-functional analyzer, the second amplifying circuit include the 3rd analog switch module, second
Amplifier module and the 3rd amplifier module, the input of the inverting input and the 3rd analog switch module of the second amplifier module
It is connected with the outfan of the first amplifier module, the homophase input of the outfan and the 3rd amplifier module of the second amplifier module
End connection, the outfan of the 3rd analog switch module are connected with the outfan of the second amplifier module.
In a kind of above-mentioned multi-functional analyzer, the first analog switch module, the second analog switch module and
Three analog switch modular circuits are identical, including single-stage double-gate analog switch, the 5th resistance, the 6th resistance and electric capacity, the list
First output pin of level double-gate analog switch, the second output pin point are connected with the 5th resistance and the 6th resistance, the single-stage double-gate
The power input of analog switch is connected with one end of the electric capacity, the electric capacity other end ground connection.
In a kind of above-mentioned multi-functional analyzer, the wave trap adopts double-T shaped filter circuit.
In a kind of above-mentioned multi-functional analyzer, the wave trap includes twin-T network, amplifier and voltage follower.
In a kind of above-mentioned multi-functional analyzer, the reference current circuit includes zero storage battery input, prime filtering
Device and four high guaily unit module, the zero level input are connected with prime wave filter, the prime wave filter and four high guaily unit mould
The reverse input end connection of block, the outfan of the wave trap are connected with the outfan of four high guaily unit module, the four high guaily unit
The outfan of module is connected for the ADC collections port with the main processor circuit.
Compared with prior art, multi-functional analyzer of the invention can analyze nA, uA, mA comprehensively even to levels such as A
Other electric current, analystal section cover the minimum and maximum current drain scope of Conventional monolithic machine, and the scope of application is wider, and practicality is more
By force.
Description of the drawings
Fig. 1 is the circuit block diagram of multi-functional analyzer in the present embodiment.
Fig. 2 is the circuit diagram of main processor circuit in the present embodiment.
Fig. 3 is the circuit diagram of the present embodiment alignment circuit.
Fig. 4 is the circuit diagram of low-pass filter circuit in the present embodiment.
Fig. 5 is the circuit diagram of second amplifying circuit in the present embodiment.
Fig. 6 is the circuit diagram of wave trap in the present embodiment.
Fig. 7 is the circuit diagram of reference current circuit in the present embodiment.
Specific embodiment
The specific embodiment of the present invention is the following is, and combines accompanying drawing and technical scheme is further described,
But the present invention is not limited to these embodiments.
As shown in figure 1, this multi-functional analyzer include main processor circuit U7, the calibration circuit that is sequentially connected, low pass filtered
Wave circuit, second amplifying circuit, wave trap and reference current circuit, calibration circuit are connected with main processor circuit.Primary processor
Circuit includes processor U7 and its peripheral circuit, and wherein processor U7 adopts STM32V8T6.
Specifically, as shown in Figures 2 and 3, calibrating circuit includes analog multiplexer and voltage transformation module, main process task
Tetra- pins of LA_C_EN, LA_C_A0, LA_C_A1 and LA_C_A2 of device circuit send a PWM ripples of default dutycycle to mould
Intend on permutator U21DG408DY, and the 2nd PWM ripples are produced by the break-make of analog multiplexer U21DG408DY, voltage turns
Mold changing block includes first resistor R52, second resistance R54,3rd resistor R60 and the 4th resistance R59, and the 2nd PWM ripples pass through respectively
First resistor R52, second resistance R54,3rd resistor R60 and the 4th resistance R59 are converted into different calibration voltages, wherein first
Resistance R52 resistances are 10K Ω, and the resistance of second resistance R54 is 10M Ω, and the resistance of 3rd resistor R60 is 100M Ω, and the 4th is electric
The resistance of resistance R59 is 10R Ω.
As shown in figure 4, low-pass filter circuit includes the first analog switch module, the second analog switch module and the first amplifier
Module, the outfan of the first analog switch module respectively with the input and the first amplifier module of the second analog switch module
Inverting input connects, and the outfan of the second analog switch module is connected with the input in the same direction of the first amplifier module.Wherein
One analog switch module includes analog switch U11, electric capacity C6, resistance R28 and resistance R31, and the second analog switch module includes mould
Intend switch U13, electric capacity C63, resistance R36 and resistance R33, the first amplifier module includes amplifier U17-A and electric capacity C58.
As shown in figure 5, second amplifying circuit includes the 3rd analog switch module, the second amplifier module and the 3rd amplifier mould
Block, the outfan of the input of the inverting input and the 3rd analog switch module of the second amplifier module with the first amplifier module
Connection, the outfan of the second amplifier module is connected with the in-phase input end of the 3rd amplifier module, the 3rd analog switch module it is defeated
Go out end to be connected with the outfan of the second amplifier module.3rd analog switch module includes analog switch U12, electric capacity C26, resistance
R35 and resistance R38,.Second amplifier module includes amplifier U16, electric capacity C67 and electric capacity C68.3rd amplifier module includes amplifying
Device U10-A and resistance R30, resistance R30 one end is grounded, the in-phase input end of another termination amplifier U10-A.This two grades are amplified electricity
Road is used to amplify the signal through low pass filter.Amplification is 2.5 and 25 times, is selected according to SN74LVC1G3157.Letter
Number by resistance R42 enter amplifier U16, its negative feedback is to amplifier U16.Then two grades of amplifications are completed by amplifier U10-A again.
As shown in fig. 6, wave trap adopts double-T shaped filter circuit, including twin-T network, amplifier and voltage follower.Wherein
Resistance R23, resistance R19, resistance R20, resistance R21, electric capacity C45, electric capacity C43, electric capacity C41 and electric capacity C40 constitute double-T shaped net
Network, amplifier U5-B for amplifying, output of its outfan as whole circuit, follower U5-A is for by the Q of wave filter
Value is improved to more than 50 times, in addition by regulation resistance R23, the resistance of resistance R21, is controlled the filtering characteristic of wave trap, is wrapped
Include the height of its bandwidth and Q-value.
As shown in fig. 7, reference current circuit includes zero storage battery input LA_ZERO_PWM, prime wave filter and the 4th fortune
Amplification module, zero level input are connected with prime wave filter, and prime wave filter is connected with the reverse input end of four high guaily unit module,
The outfan of wave trap is connected with the outfan of four high guaily unit module, and the outfan of four high guaily unit module is for electric with primary processor
The ADC collections port connection on road.Resistance 17 and electricity of the signal by zero storage battery input LA_ZERO_PWM inputs by two 10K
Resistance R18 enters amplifier U6-B after being converted into voltage, wherein resistance R17 and resistance R18 Main Functions are by zero storage battery input LA_
The PWM ripples of ZERO_PWM inputs are converted into reference voltage.The amplification of amplifier U6-B is single times, can by resistance R16/R17
.
Specific embodiment described herein is only explanation for example spiritual to the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of multi-functional analyzer, including primary processor, it is characterised in that the multi-functional analyzer also includes being sequentially connected
Calibration circuit, low-pass filter circuit, second amplifying circuit, wave trap and reference current circuit, the calibration circuit with it is described
Primary processor connects.
2. a kind of multi-functional analyzer according to claim 1, it is characterised in that the calibration circuit includes analog-converted
Switch and voltage transformation module, the primary processor send default dutycycle a PWM ripples are to analog multiplexer and pass through
The break-make of analog multiplexer produces the 2nd PWM ripples, and the voltage transformation module includes first resistor, second resistance, the 3rd electric
Resistance and the 4th resistance, the 2nd PWM ripples are converted into by first resistor, second resistance, 3rd resistor and the 4th resistance respectively
Different calibration voltages.
3. a kind of multi-functional analyzer according to claim 1 and 2, it is characterised in that the low-pass filter circuit includes
First analog switch module, the second analog switch module and the first amplifier module, the outfan of the first analog switch module
It is connected with the inverting input of the input and the first amplifier module of the second analog switch module respectively, second simulation is opened
The outfan for closing module is connected with the input in the same direction of the first amplifier module.
4. a kind of multi-functional analyzer according to claim 3, it is characterised in that the second amplifying circuit includes the 3rd
Analog switch module, the second amplifier module and the 3rd amplifier module, the inverting input and the 3rd mould of the second amplifier module
The input for intending switch module is connected with the outfan of the first amplifier module, the outfan and the 3rd of the second amplifier module
The in-phase input end connection of amplifier module, the outfan of the outfan and the second amplifier module of the 3rd analog switch module connect
Connect.
5. a kind of multi-functional analyzer according to claim 4, it is characterised in that the first analog switch module,
Two analog switch modules are identical with the 3rd analog switch modular circuit, including single-stage double-gate analog switch, the 5th resistance, the 6th
Resistance and electric capacity, the first output pin of the single-stage double-gate analog switch, the second output pin divide and the 5th resistance and the 6th resistance
Connection, the power input of the single-stage double-gate analog switch are connected with one end of the electric capacity, the electric capacity other end ground connection.
6. a kind of multi-functional analyzer according to claim 1 and 2, it is characterised in that the wave trap adopts double-T shaped filter
Wave circuit.
7. a kind of multi-functional analyzer according to claim 6, it is characterised in that the wave trap includes twin-T network, puts
Big device and voltage follower.
8. a kind of multi-functional analyzer according to claim 1 and 2, it is characterised in that the reference current circuit includes
Zero storage battery input, prime wave filter and four high guaily unit module, the zero level input are connected with prime wave filter, it is described before
Level wave filter is connected with the reverse input end of four high guaily unit module, the output of the outfan and four high guaily unit module of the wave trap
End connection, the outfan of the four high guaily unit module are connected for the ADC collections port with the primary processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939100.XA CN106556736A (en) | 2016-10-25 | 2016-10-25 | A kind of multi-functional analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939100.XA CN106556736A (en) | 2016-10-25 | 2016-10-25 | A kind of multi-functional analyzer |
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| Publication Number | Publication Date |
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| CN106556736A true CN106556736A (en) | 2017-04-05 |
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| CN201610939100.XA Pending CN106556736A (en) | 2016-10-25 | 2016-10-25 | A kind of multi-functional analyzer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787997A3 (en) * | 1996-01-30 | 1998-07-08 | Fluke Corporation | Adaptive digital filter for improved measurement accuracy in an electronic instrument |
| CN102043090A (en) * | 2009-10-23 | 2011-05-04 | 西安费斯达自动化工程有限公司 | Measurement system for frequency-shift signal parameter of track circuit |
| CN202033413U (en) * | 2011-04-26 | 2011-11-09 | 王学立 | Voltage collecting module |
| US20130332099A1 (en) * | 2012-06-07 | 2013-12-12 | Askey Computer Corp. | Current measurement system |
| CN203405506U (en) * | 2013-09-03 | 2014-01-22 | 北京恒源利通电力技术有限公司 | Sampling circuit of resistor divider type voltage sensor |
| CN104515899A (en) * | 2013-09-27 | 2015-04-15 | 王连义 | Enzyme electrode micro current magnitude detection device |
| CN105425183A (en) * | 2015-11-13 | 2016-03-23 | 安徽朗格暖通设备有限公司 | Electronic instrument calibration circuit and calibration device |
-
2016
- 2016-10-25 CN CN201610939100.XA patent/CN106556736A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787997A3 (en) * | 1996-01-30 | 1998-07-08 | Fluke Corporation | Adaptive digital filter for improved measurement accuracy in an electronic instrument |
| CN102043090A (en) * | 2009-10-23 | 2011-05-04 | 西安费斯达自动化工程有限公司 | Measurement system for frequency-shift signal parameter of track circuit |
| CN202033413U (en) * | 2011-04-26 | 2011-11-09 | 王学立 | Voltage collecting module |
| US20130332099A1 (en) * | 2012-06-07 | 2013-12-12 | Askey Computer Corp. | Current measurement system |
| CN203405506U (en) * | 2013-09-03 | 2014-01-22 | 北京恒源利通电力技术有限公司 | Sampling circuit of resistor divider type voltage sensor |
| CN104515899A (en) * | 2013-09-27 | 2015-04-15 | 王连义 | Enzyme electrode micro current magnitude detection device |
| CN105425183A (en) * | 2015-11-13 | 2016-03-23 | 安徽朗格暖通设备有限公司 | Electronic instrument calibration circuit and calibration device |
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Application publication date: 20170405 |
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