CN106092227A - Liquid volume flow monitoring system based on three-stage amplifier and power supervisor - Google Patents
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor Download PDFInfo
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- CN106092227A CN106092227A CN201610587308.XA CN201610587308A CN106092227A CN 106092227 A CN106092227 A CN 106092227A CN 201610587308 A CN201610587308 A CN 201610587308A CN 106092227 A CN106092227 A CN 106092227A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/60—Circuits therefor
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- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses liquid volume flow monitoring system based on three-stage amplifier and power supervisor, comprising data collection station and connected remote monitoring terminal, described data collection station comprises micro controller module, flow transducer, analog to digital conversion circuit, three-stage amplifier, data transmission module, power supervisor and power module；Certainty of measurement height of the present invention, good stability, reliability are high, the magnet exciting coil being driven flow transducer by output excitation signal produces magnetic field, and be responsible for the induction electromotive force gathering with processing flow transducer output, and then accurately calculate the volume flow of conducting liquid.
Description
Technical field
The present invention relates to a kind of effusion meter, particularly relate to liquid volume stream based on three-stage amplifier and power supervisor
Amount monitoring system, belongs to flow detection control field.
Background technology
Electromagnetic flowmeter is a kind of measuring instrument measuring conducting medium volume flow, has certainty of measurement height, stability
Good, reliability high.Electromagnetic flowmeter, in addition to can measuring the flow of general conducting liquid, also can measure liquid-solid two-phase liquid
Body, high viscosity liquid and salt, strong acid, the volume flow of highly basic liquid, can be widely applied to cement, chemical industry, light textile, metallurgy,
The industrial technology departments such as mine, papermaking, medicine, plumbing, food and drink, environmental protection, the performance of its product, q&r pair
The economic benefit of above-mentioned enterprise has important impact.Tradition electromagnetic flowmeter typically uses 8 or the single-chip microcomputer of 16, monolithic
Machine process performance is few compared with weak and peripheral interface, the most improper does low power dissipation design；For battery-powered electromagnetic flowmeter,
System need to use 32 bit processors of low-power consumption, eminence rationality.
Such as a kind of electromagnetic flowmeter of Application No. " 201110090018.1 ", differential noise measuring is big by it
Value, improves the reliability of unusual determination.This electromagnetic flowmeter by during positive excitation to without the transition during excitation start to
Till specified time limit without (T1) during being set to the 1st during excitation, by during negative excitation to without the transition during excitation
Start to through specified time limit without (T2) during being set to the 2nd during excitation, with regard to (T1) and the 2nd phase during each 1st
Between (T2) obtain voltage sum produced by detecting electrode (4a) produced voltage now and detecting electrode (4b) as electrode
Between voltage and, according to this interelectrode voltage and, judge electromagnetic flowmeter exception (emptying detection, insulating properties foreign body attached
At electrode first-class).
And for example a kind of electromagnetic flowmeter of Application No. " 201110049402.7 ", including sensor and transducer, described
Sensor includes that magnet exciting coil, electrode, conduit, described transducer include that excitation driving, CPU, electrode signal are measured
Unit, described excitation drive circuit sends exciting current；Especially, the uneven number that described exciting current has for power frequency divides again
The excitation frequency of frequency.Compared to prior art, the interval of adjacent two-stage excitation frequency is less, and choice is bigger, it is achieved by low
Frequently noise jamming impact is down to minimum and exports stable taking into account.But certainty of measurement needs to be improved further.
Summary of the invention
The technical problem to be solved is that the deficiency for background technology provides a kind of certainty of measurement height, stablizes
The conducting liquid volume flow amount detecting device that property is good, reliability is high.
The present invention solves above-mentioned technical problem by the following technical solutions:
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor, comprise data collection station with
And connected remote monitoring terminal, described data collection station comprises micro controller module, flow transducer, analog digital conversion
Circuit, three-stage amplifier, data transmission module, power supervisor and power module, described data transmission module comprises monolithic
Machine and radiofrequency launcher, described flow transducer passes sequentially through analog to digital conversion circuit, three-stage amplifier connects microcontroller mould
Block, described micro controller module connects radiofrequency launcher by single-chip microcomputer, and described power module connects micro-by power supervisor
Controller module；Wherein, described flow transducer is used for producing induction electromotive force；Described micro controller module is for according to generation
Induction electromotive force calculate the volume flow of conducting liquid；And then by Single-chip Controlling radiofrequency launcher by leading of calculating
Electricity liquid volume flow transmits to remote monitoring terminal；
Described three-stage amplifier comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th
Resistance, the 7th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity,
First diode, the first audion, the second audion, the 3rd audion；Described first resistance is rheostat, described first resistance
Sliding end connect one end of the first electric capacity, the other end of described first electric capacity connects one end of the second resistance, the 3rd electricity respectively
One end of appearance, one end of the 3rd resistance, the base stage of the first audion, the other end ground connection of described 3rd resistance, the described 1st
The emitter stage of pole pipe connects one end of the 5th resistance, one end of the 4th electric capacity, the other end of described 5th resistance, the 4th electricity respectively
The equal ground connection of the other end held；The colelctor electrode of described first audion connect respectively the other end of the 3rd electric capacity, the one of the 4th resistance
End, the base stage of the second audion；The emitter stage of described second audion connects one end of the 5th electric capacity, described 5th electric capacity another
One end ground connection；The colelctor electrode of described second audion connects the other end of the second resistance, one end of the second electric capacity, the 6th electricity respectively
One end of appearance, the emitter stage of the 3rd audion；The other end of described second electric capacity connects one end of the 6th resistance, the 7th electricity respectively
One end of resistance, the other end of described 7th resistance connects the colelctor electrode of the 3rd audion, one end of the 7th electric capacity respectively, and described the
The other end ground connection of seven electric capacity；The other end of described 6th resistance connects the anode of the first diode, the 3rd audion respectively
Base stage；The negative electrode of described first diode connects the other end of the 4th resistance；
Described power supervisor comprises sampling filter circuit, magnetic biasing testing circuit, DSP module, CPLD module, isolation drive
Circuit, power amplification circuit, controller, interface module and remote communication module；Described sampling filter circuit, magnetic biasing detection electricity
Road, power amplification circuit and interface module are connected on the corresponding port of DSP module, and described DSP module passes through CPLD mould
Block connects isolated drive circuit, and described DSP module connects remote communication module by controller.
Further as present invention liquid volume flow based on three-stage amplifier and power supervisor monitoring system
Preferred version, described micro controller module uses EFM32 microcontroller.
Further as present invention liquid volume flow based on three-stage amplifier and power supervisor monitoring system
Preferred version, described remote monitoring terminal comprises controller module and the connected data reception module of difference, display mould
Block and data memory module.
Further as present invention liquid volume flow based on three-stage amplifier and power supervisor monitoring system
Preferred version, described flow transducer uses vortex flow sensor.
Further as present invention liquid volume flow based on three-stage amplifier and power supervisor monitoring system
Preferred version, described display module uses LCD display.
The present invention uses above technical scheme compared with prior art, has following technical effect that
1, the present invention can detect conducting liquid volume flow in real time in real time, and then will gather data transmission to remotely monitoring
Terminal, convenient real-time completes monitoring；
2, the present invention uses EFM32 microcontroller, and it has the low power consumption characteristic of excellence, and EFM32 kernel uses Cortex-
M3 designs, and has the strongest expanded function；
3, the present invention by output excitation signal drive flow transducer magnet exciting coil produce magnetic field, and be responsible for gather with
Process the induction electromotive force of flow transducer output, and then accurately calculate the volume flow of conducting liquid.
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention；
Fig. 2 is the structure principle chart of data collection station of the present invention；
Fig. 3 is the circuit diagram of data collection station three-stage amplifier of the present invention；
Fig. 4 be the circuit diagram of data collection station of the present invention structure principle chart.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in further detail:
As it is shown in figure 1, liquid volume flow monitoring system based on three-stage amplifier and power supervisor, comprise data
Acquisition terminal and connected remote monitoring terminal, described data collection station is used for detecting in real time and calculating conductive liquid
Body volume flow so by radiofrequency launcher launch to remote monitoring terminal.
As in figure 2 it is shown, described data collection station comprise micro controller module, flow transducer, analog to digital conversion circuit, three
Level amplifying circuit, data transmission module, power supervisor and power module, described data transmission module comprises single-chip microcomputer and radio frequency
Emitter, described flow transducer passes sequentially through analog to digital conversion circuit, three-stage amplifier connects micro controller module, described micro-
Controller module connects radiofrequency launcher by single-chip microcomputer, and described power module connects microcontroller mould by power supervisor
Block；Described flow transducer uses vortex flow sensor, and wherein, described flow transducer is used for producing induction electromotive force；
Described micro controller module for calculating the volume flow of conducting liquid according to the induction electromotive force produced；And then pass through monolithic
Machine controls radiofrequency launcher to be transmitted the conducting liquid volume flow calculated to remote monitoring terminal；The volume flow of conducting liquid
Specifically being calculated as follows of amount:
Wherein, qvFor the volume flow of conducting liquid, D is for measuring bore, and L is the effective of measurement pipe
Length, k is magnetic induction constant, and V is induction electromotive force, and B is magnetic induction；
As it is shown on figure 3, described three-stage amplifier comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance,
Five resistance, the 6th resistance, the 7th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electricity
Appearance, the 7th electric capacity, the first diode, the first audion, the second audion, the 3rd audion；Described first resistance is rheostat,
The sliding end of described first resistance connects one end of the first electric capacity, and the other end of described first electric capacity connects the second resistance respectively
One end, one end of the 3rd electric capacity, one end of the 3rd resistance, the base stage of the first audion, the other end ground connection of described 3rd resistance,
The emitter stage of described first audion connects one end of the 5th resistance, one end of the 4th electric capacity respectively, described 5th resistance another
One end, the equal ground connection of the other end of the 4th electric capacity；The colelctor electrode of described first audion connect respectively the other end of the 3rd electric capacity,
One end of four resistance, the base stage of the second audion；The emitter stage of described second audion connects one end of the 5th electric capacity, and described the
The other end ground connection of five electric capacity；The colelctor electrode of described second audion connects the other end of the second resistance, the second electric capacity respectively
One end, one end of the 6th electric capacity, the emitter stage of the 3rd audion；The other end of described second electric capacity connects the 6th resistance respectively
One end, one end of the 7th resistance, the other end of described 7th resistance connects the colelctor electrode of the 3rd audion, the 7th electric capacity respectively
One end, the other end ground connection of described 7th electric capacity；The other end of described 6th resistance connect respectively the anode of the first diode,
The base stage of three audions；The negative electrode of described first diode connects the other end of the 4th resistance；
As shown in Figure 4, described power supervisor comprises sampling filter circuit, magnetic biasing testing circuit, DSP module, CPLD mould
Block, isolated drive circuit, power amplification circuit, controller, interface module and remote communication module；Described sampling filter circuit,
Magnetic biasing testing circuit, power amplification circuit and interface module are connected on the corresponding port of DSP module, described DSP module
Connecting isolated drive circuit by CPLD module, described DSP module connects remote communication module by controller.
Described micro controller module uses remote monitoring terminal described in EFM32 microcontroller comprise controller module and divide
The most connected data reception module, display module and data memory module, described display module uses LCD display.
The operation principle of electromagnetic flowmeter is based on Faraday law of electromagnetic induction.In electromagnetic flowmeter, measure in pipe
Conducting medium be equivalent to the conducting metal bar in faraday's test, two solenoids at upper and lower two ends produce stationary magnetic fields.
When there being conducting medium to flow through, then can produce induced voltage, the induced voltage that two electrode measurements of pipe interior produce.Measure
Pipeline is realized and fluid and the electromagnetic isolation of measurement electrode by nonconducting liner.
The main control MCU of electromagnetic flowmeter can choose band LCD driving force EFM32TG840F32 or
EFM32G840F128, owing to model pin corresponding between each series of the product of EFM32 is directly compatible with, user can be according to actual items
Mesh functional requirement carries out function cutting or upgrading.Main control MCU drives the excitation wire of flow transducer by DA output excitation signal
Circle produces magnetic field, and is responsible for the induction electromotive force gathering with processing flow transducer output, and then calculates the body of conducting liquid
Long-pending flow.
The main feature of electromagnetic flowmeter: sensor construction is simple, does not has mechanical rotation to measure parts；In the process of measurement
In, do not affected by measured medium temperature, viscosity, density and electrical conductivity；Range ability is the widest, and only flat with measured medium
Current-sharing short-term training direct ratio, and the flow regime under being distributed with axial symmetry is unrelated, and be quick on the draw, good linearity.
EFM32 is 32 8-digit microcontrollers of whole world lowest power consumption, and under the EM2 pattern that RTC, DMA can run, static current of lcd is only
For 900nA, do not run under the pattern of RTC can as little as 600nA, and only have 20nA especially when not preserving RAM data.Meanwhile, sheet
On be integrated with low-power consumption peripheral hardware especially: low-power consumption UART and I2C can run under EM2 pattern, can realize under CPU sleep pattern
Transmitting-receiving and the data identification of data wake up up.Power owing to Electromagnetic Flow is calculated as battery, power consumption is had certain requirement, to power consumption
Require that higher occasion even can be controlled the power supply of each module by EFM32, improve its stand-by time to greatest extent, therefore
The low-power consumption of EFM32 has obvious advantage.
It is understood that unless otherwise defined, all terms used herein (include skill to those skilled in the art of the present technique
Art term and scientific terminology) have with the those of ordinary skill in art of the present invention be commonly understood by identical meaning.Also
It should be understood that those terms defined in such as general dictionary should be understood that have with in the context of prior art
The consistent meaning of meaning, and unless defined as here, will not explain by idealization or the most formal implication.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within scope
Within.Above in conjunction with accompanying drawing, embodiments of the present invention are explained in detail, but the present invention is not limited to above-mentioned embodiment party
Formula, in the ken that those of ordinary skill in the art are possessed, it is also possible to do on the premise of or else departing from present inventive concept
Go out various change.
Claims (5)
1. liquid volume flow monitoring system based on three-stage amplifier and power supervisor, it is characterised in that: comprise data
Acquisition terminal and connected remote monitoring terminal, described data collection station comprises micro controller module, flow sensing
Device, analog to digital conversion circuit, three-stage amplifier, data transmission module, power supervisor and power module, described data transmission mould
Block comprises single-chip microcomputer and radiofrequency launcher, and described flow transducer passes sequentially through analog to digital conversion circuit, three-stage amplifier connects
Micro controller module, described micro controller module connects radiofrequency launcher by single-chip microcomputer, and described power module passes through power supply pipe
Reason device connects micro controller module；Wherein, described flow transducer is used for producing induction electromotive force；Described micro controller module is used
In the volume flow calculating conducting liquid according to the induction electromotive force produced；And then incited somebody to action by Single-chip Controlling radiofrequency launcher
The conducting liquid volume flow calculated is transmitted to remote monitoring terminal；
Described three-stage amplifier comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity,
One diode, the first audion, the second audion, the 3rd audion；Described first resistance is rheostat, described first resistance
Sliding end connects one end of the first electric capacity, and the other end of described first electric capacity connects one end of the second resistance, the 3rd electric capacity respectively
One end, one end of the 3rd resistance, the base stage of the first audion, the other end ground connection of described 3rd resistance, described one or three pole
The emitter stage of pipe connects one end of the 5th resistance, one end of the 4th electric capacity, the other end of described 5th resistance, the 4th electric capacity respectively
The equal ground connection of the other end；The colelctor electrode of described first audion connect respectively the other end of the 3rd electric capacity, one end of the 4th resistance,
The base stage of the second audion；The emitter stage of described second audion connects one end of the 5th electric capacity, another of described 5th electric capacity
End ground connection；The colelctor electrode of described second audion connects the other end of the second resistance, one end of the second electric capacity, the 6th electric capacity respectively
One end, the emitter stage of the 3rd audion；The other end of described second electric capacity connects one end of the 6th resistance, the 7th resistance respectively
One end, the other end of described 7th resistance connects the colelctor electrode of the 3rd audion, one end of the 7th electric capacity respectively, the described 7th
The other end ground connection of electric capacity；The other end of described 6th resistance connects the anode of the first diode, the base of the 3rd audion respectively
Pole；The negative electrode of described first diode connects the other end of the 4th resistance；
Described power supervisor comprises sampling filter circuit, magnetic biasing testing circuit, DSP module, CPLD module, isolation drive electricity
Road, power amplification circuit, controller, interface module and remote communication module；Described sampling filter circuit, magnetic biasing testing circuit,
Power amplification circuit and interface module are connected on the corresponding port of DSP module, and described DSP module is by CPLD module even
Connecing isolated drive circuit, described DSP module connects remote communication module by controller.
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor the most according to claim 1,
It is characterized in that: described micro controller module uses EFM32 microcontroller.
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor the most according to claim 1,
It is characterized in that: described remote monitoring terminal comprises controller module and connected data reception module, display respectively
Module and data memory module.
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor the most according to claim 1,
It is characterized in that: described flow transducer uses vortex flow sensor.
Liquid volume flow monitoring system based on three-stage amplifier and power supervisor the most according to claim 3,
It is characterized in that: described display module uses LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610587308.XA CN106092227A (en) | 2016-07-22 | 2016-07-22 | Liquid volume flow monitoring system based on three-stage amplifier and power supervisor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610587308.XA CN106092227A (en) | 2016-07-22 | 2016-07-22 | Liquid volume flow monitoring system based on three-stage amplifier and power supervisor |
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| CN106092227A true CN106092227A (en) | 2016-11-09 |
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| CN201610587308.XA Pending CN106092227A (en) | 2016-07-22 | 2016-07-22 | Liquid volume flow monitoring system based on three-stage amplifier and power supervisor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911657A (en) * | 2017-11-17 | 2018-04-13 | 苏州合利美电子科技有限公司 | A kind of cmos image remote monitoring system based on sensor network |
| CN107991923A (en) * | 2017-11-17 | 2018-05-04 | 苏州合利美电子科技有限公司 | A kind of garment material detection device based on FlexiForce |
| CN111879367A (en) * | 2020-08-03 | 2020-11-03 | 江苏工程职业技术学院 | Electromagnetic flowmeter system and control circuit based on Internet of things |
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