CN107806909B - A kind of impulse type cereal flow transducer signal acquisition and processing apparatus - Google Patents
A kind of impulse type cereal flow transducer signal acquisition and processing apparatus Download PDFInfo
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- CN107806909B CN107806909B CN201710820252.2A CN201710820252A CN107806909B CN 107806909 B CN107806909 B CN 107806909B CN 201710820252 A CN201710820252 A CN 201710820252A CN 107806909 B CN107806909 B CN 107806909B
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- mixed signal
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- impulse type
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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
- G01F1/05—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 mechanical effects
- G01F1/20—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 mechanical effects by detection of dynamic effects of the flow
- G01F1/28—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 mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
- G01F1/30—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 mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter for fluent solid material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
- G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
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- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention proposes a kind of impulse type cereal flow transducer signal acquisition and processing apparatus, it is combined using double parallel beam sensor and two groups of processor systems, including two mixed signal microcontrollers, integrated single supply instrument amplifier and mixed signal microcontroller constitute two-stage amplifying circuit, and mixed signal microcontroller and embedded 32 bit processor constitute two-stage treatment framework.The present invention can guarantee signal condition performance, while adapt to the case where difference common-mode voltage caused by different driving voltages and signal input range change；Two kinds of impulse type cereal flow signal acquisitions of compatible with single parallel girder and double flat cross girders guarantee each data collection synchronous in a manner of shared rs 232 serial interface signal, reduce Production rate error；It supports floating-point operation, can directly run complicated signal processing algorithm, avoid traditional host computer processing scheme, improve the portability of system；And the case where supporting 6-36V DC voltage to input, can adapt to vehicle power supply power supply potentially unstable.
Description
Technical field
The invention belongs to precision agriculture and intelligent agricultural machinery field, especially a kind of impulse type cereal flow transducer signal is adopted
Collect processing unit.
Background technique
Crop yield information is obtained, yield spatial distribution map is established, is Scientific Regulation investment and system during realizing crop production
Determine the important foundation of administrative decision measure, and realizes the core technology and prerequisite of precision agriculture.Estimation System of Grain Production is
The important tool for carrying out crop yield acquisition, there is now out close to 30 years history.It is divided from principle, the core of Estimation System of Grain Production
Center portion part cereal flow transducer can be divided into based on quality stream and based on two types of volume flow.In contrast, the former precision
It is preferable with stability, so American-European mainstream system for measuring yield is all based on greatly quality stream principle.Quality stream detection has impulse type, Weighing type
And a variety of ways of realization such as gamma ray formula, wherein impulse type is relatively easy and easy for installation due to realizing, using the most
Extensively.Since 2001, domestic multiple research institutions carried out the research of impulse type Estimation System of Grain Production in succession, formd Dan Ping
Cross girders and the two kinds of impulse type cereal flow transducer of double flat cross girders.From framework, major part cereal, which is surveyed, at present is produced
System is by the way of signal acquisition and data processing separation, i.e., flow sensor is merely responsible for acquisition information, and data processing exists
Vehicle-mounted host computer carries out, and impulse type cereal flow transducer is no exception.On the one hand this framework increases operation to host computer
On the other hand burden reduces the portability surveyed and produce sensor, it is mutual also to result in current mainstream commercial product indirectly
It is compatible insufficient, obstacle is caused for the standardization of intelligent agricultural machinery critical component.
Summary of the invention
Technical problem solved by the invention is to provide a kind of impulse type cereal flow transducer signal acquisition process dress
It sets, is combined using double parallel beam sensor and two groups of processor systems, can adapt to single parallel girder and two kinds of double flat cross girders knots
Structure exports corn mass flow data in real time, reduces the dependence to host computer, portable strong.
The technical solution for realizing the aim of the invention is as follows:
A kind of impulse type cereal flow transducer signal acquisition and processing apparatus, including two-stage amplifying circuit and two-stage treatment frame
Structure, wherein two-stage amplifying circuit includes the first integrated single supply instrument amplifier, the second integrated single supply instrument amplifier and the
The amplification module in amplification module, the second mixed signal microcontroller in one mixed signal microcontroller, two-stage treatment framework
Including the Preprocessing Algorithm mould in Preprocessing Algorithm module in the first mixed signal microcontroller, the second mixed signal microcontroller
Block and embedded 32 bit processor；Specifically:
It is flat to be respectively used to acquisition first for first integrated single supply instrument amplifier, the second integrated single supply instrument amplifier
The cereal impact signal of cross girders sensor and the second parallel beam sensor, and the first order is carried out to the cereal impact signal of input and is put
Big processing, then exported respectively to the first mixed signal microcontroller, the second mixed signal microcontroller；
First mixed signal microcontroller, the second mixed signal microcontroller include built-in amplification module, AD conversion
Module and the Preprocessing Algorithm module write using mixed signal microcontroller calculation resources, amplification module are used for filtered
Cereal impact signal carry out second level enhanced processing, AD conversion module be used for the analog signal by second level enhanced processing into
Row analog-to-digital conversion, the data such as Preprocessing Algorithm module is used to carry out rejecting outliers to digital signal, dynamic property is adjusted are located in advance
Reason, after treatment are exported to embedded 32 bit processor；
Embedded 32 bit processor, for handle to pretreated digital signal and impacting treated cereal
Signal is sent to host computer.
Further, impulse type cereal flow transducer signal acquisition and processing apparatus of the invention, described first is integrated single
Power supply instrument amplifier and the second integrated single supply instrument amplifier are all made of the single supply instrument amplifier of model AD623,
And it is set as 64 times of amplifications.
Further, impulse type cereal flow transducer signal acquisition and processing apparatus of the invention, the first integrated single supply
Instrument amplifier, the second integrated single supply instrument amplifier and the first mixed signal microcontroller, the second mixed signal microcontroller
Low-pass filter is provided between device, the low-pass filter is second order Butterworth filter, including low drifting track to track is transported
Amplifier SGM8422 is calculated, wherein SGM8422 is gathered around there are two amplifier.
Further, impulse type cereal flow transducer signal acquisition and processing apparatus of the invention, the first mixing letter
The transmission data pin of number microcontroller and the second mixed signal microcontroller connects with two of embedded 32 bit processor respectively
It receives data pin to be connected, the reception data pin and insertion of the first mixed signal microcontroller and the second mixed signal microcontroller
The same transmission data pin of 32 bit processor of formula is connected, and forms shared signal wire.
Further, impulse type cereal flow transducer signal acquisition and processing apparatus of the invention, the first mixing letter
Number microcontroller and the second mixed signal microcontroller are all made of the integrated programmable gain amplification module of model HY16F188
With 32 bit processors of converter, amplification module gain is set as 2 times of amplifications.
Further, impulse type cereal flow transducer signal acquisition and processing apparatus of the invention, described embedded 32
Processor is using the integrated floating-point operation of model STM32F405 and embedded 32 bit processor of DSP function.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
1, the present invention constitutes two-stage amplifying circuit using integrated single supply instrument amplifier and mixed signal microcontroller,
Under the premise of guaranteeing signal condition performance, difference common-mode voltage caused by different driving voltages and the variation of signal input range are adapted to
The case where；
2, the present invention uses two mixed signal microcontrollers, has not only been compatible with two kinds of momentums of single parallel girder and double flat cross girders
The acquisition of formula cereal flow signal, and can guarantee the synchronization of each data acquisition in a manner of sharing rs 232 serial interface signal, it reduces
Production rate error；
3, the present invention constitutes two-stage treatment framework using mixed signal microcontroller and embedded 32 bit processor, to double flat
The signal of cross girders sensor is handled, and the computing resource of the present apparatus is taken full advantage of, and support floating-point operation, so that of the invention
Complicated signal processing algorithm can be directly run, traditional host computer processing scheme is avoided, improves the portable of system
Property.
Detailed description of the invention
Fig. 1 is impulse type cereal flow transducer signal processing apparatus structural schematic diagram of the invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
A kind of impulse type cereal flow transducer signal acquisition and processing apparatus, as shown in Figure 1, include two-stage amplifying circuit and
Two-stage treatment framework, wherein two-stage amplifying circuit includes the first integrated single supply instrument amplifier, the second integrated single supply instrument
Amplifier and the amplification module in the first mixed signal microcontroller, the amplification module in the second mixed signal microcontroller, two
Grade processing framework includes Preprocessing Algorithm module in the first mixed signal microcontroller, in the second mixed signal microcontroller
Preprocessing Algorithm module and embedded 32 bit processor；Specifically:
It is flat to be respectively used to acquisition first for first integrated single supply instrument amplifier, the second integrated single supply instrument amplifier
The cereal impact signal of cross girders sensor and the second parallel beam sensor, and the first order is carried out to the cereal impact signal of input and is put
Big processing, then exported respectively to the first mixed signal microcontroller, the second mixed signal microcontroller；
First mixed signal microcontroller, the second mixed signal microcontroller include built-in amplification module, AD conversion
Module and the Preprocessing Algorithm module write using mixed signal microcontroller calculation resources, amplification module are used for filtered
Cereal impact signal carry out second level enhanced processing, AD conversion module be used for the analog signal by second level enhanced processing into
Row analog-to-digital conversion, the data such as Preprocessing Algorithm module is used to carry out rejecting outliers to digital signal, dynamic property is adjusted are located in advance
Reason, after treatment are exported to embedded 32 bit processor；
Embedded 32 bit processor, for handle to pretreated digital signal and impacting treated cereal
Signal is sent to host computer.
First integrated single supply instrument amplifier, the second integrated single supply instrument amplifier and the first mixed signal microcontroller
Low-pass filter is provided between device, the second mixed signal microcontroller, the low-pass filter is the filtering of second order Butterworth
Device, including low drifting track to track operational amplifier SGM8422, wherein SGM8422 is gathered around there are two amplifier.
First integrated single supply instrument amplifier and the second integrated single supply instrument amplifier are all made of model AD623's
Single supply instrument amplifier, and it is set as 64 times of amplifications.First mixed signal microcontroller and the second mixed signal microcontroller
It is all made of the integrated programmable gain amplification module of model HY16F188 and 32 bit processors of converter, amplification module increases
Benefit is set as 2 times of amplifications.
The transmission data pin of first mixed signal microcontroller and the second mixed signal microcontroller respectively with it is embedded
Two reception data pins of 32 bit processors are connected, the first mixed signal microcontroller and the second mixed signal microcontroller
It receives data pin to be connected with the same transmission data pin of embedded 32 bit processor, forms shared signal wire.
Embedded 32 bit processor using model STM32F405 integrated floating-point operation and DSP function embedded 32
Bit processor.
In addition also there is the first DC-DC module, connect with DC input voitage, be that low-pass filter is powered for being depressured；
Low pressure difference linear voltage regulator LDO is connect with the first DC-DC module, is mixed for being depressured for the first mixed signal microcontroller, second
Close signal microcontroller and the power supply of embedded 32 bit processor；Second DC-DC module, with the first DC-DC module, high-precision digital-to-analogue
Converter DAC is all connected with, and is that high precision digital-to-analog converter DAC powers for boosting；High precision digital-to-analog converter DAC, with insertion
The communication connection of 32 bit processor of formula, obtains 5-10V voltage, gives 5-10V voltage output to driving voltage module by follower,
Middle driving voltage module beam sensor parallel with first and the second parallel beam sensor connection, for being the first parallel beam sensor
Beam sensor power supply parallel with second.
High precision digital-to-analog converter DAC is connect by Serial Peripheral Interface (SPI) with embedded 32 bit processor；Embedded 32
Processor is also connected with serial communication modular and CAN bus module；Embedded 32 bit processor is using model STM32F405's
Embedded 32 bit processor of integrated floating-point operation and DSP function.
Embodiment 1
A kind of impulse type cereal flow transducer signal acquisition and processing apparatus is gathered around there are two signal input channel, to adapt to
Two kinds of structures of single parallel girder and double flat cross girders.The driving voltage of general parallel beam sensor can be between 5-15V, and sensitivity exists
1-2mv/V.By taking driving voltage 5V, sensitivity 2mv/V as an example, it is -10mv~+10mv that parallel beam sensor, which expires width output area,.
The input signal is faint differential analog signal, cannot be directly AD converted, it is necessary to progress differential amplification first.HY16F188
Processor is 32 bit processors of a integrated programmable gain and high-resolution converter.The present embodiment utilizes should
The included programmable automation controller module of HY16F188 processor chips and integrated single supply instrument amplifier AD623 form two-stage
Amplifying circuit, wherein the fixed setting of AD623 amplifier is 64 times of amplifications.Expire the requirement of width output area according to parallel beam sensor,
When driving voltage is 5V, the amplification module gain in HY16F188 processor is set as 2 times of gains, is equivalent to supported input
Range of signal are as follows: -19.53mv~+19.53mv can just acquire parallel beam sensor output signal, and there are nargin.
In order to reduce the influence of analogue noise, before signal enters HY16F188 processor, it is arranged one by low drift
The second order Butterworth filter that track to track operational amplifier SGM8422 is constituted carries out low-pass filtering.Wherein SGM8422 amplifier
It gathers around there are two amplifier, can respectively provide a filter for two channels.HY16F188 processor integrates Sigma-Delta AD
Conversion module, highest support 960Hz programmable data output speed, and the Nyquist for meeting acquisition cereal impact signal enough is fixed
Rule requires, and converts analog signals into digital signal.Although HY16F188 processor possesses 8 independent analog channels, access 1
The sampling output of 500hz may be implemented in the parallel beam sensor in road.But since 8 channels of monolithic HY16F188 processor are
Poll acquisition, can not accomplish synchronous acquisition, it is contemplated that compatible double parallel beam sensor, as shown in Figure 1, increasing a piece of HY16F188
Processor chips correspond to a piece of HY16F188 processor per parallel girder sensor all the way.It will using two panels HY16F188 processor
The analog signal of double parallel beam sensor output is converted to digital signal, then carries out data by Preprocessing Algorithm module and locate in advance
Reason, wherein Preprocessing Algorithm module is write using controller calculation resources, is able to detect exceptional value, is adjusted dynamic property
Deng then sending data to embedded 32 bit processor of integrated floating-point operation and DSP function by serial communication
STM32F405.In order to preferably realize synchronous acquisition, a kind of two serial communication sides of shared signal wire are had also been devised in the present invention
Case, i.e. the transmission data pin TXD of two panels HY16F188 the processor difference with two serial ports of STM3F405 processor respectively
Data pin RXD is received to be connected, and two receive the same transmission that data pin RXD is then connected to STM32F405 processor
Data pin TXD forms the scheme of shared signal wire.Embedded 32 bit processor STM32F405 passes through transmission every 1s sending
Data pin TXD issues synchronization signal, and two panels HY16F188 processor will be by interrupting while receiving synchronization signal, to guarantee
Synchronous acquisition.
In order to make full use of the computing resource of device, realize that parallel girder sensing data is located in advance in HY16F188 processor
Link is managed, constitutes two-stage signal processing structure, treated cereal impact signal with embedded 32 bit processor STM32F405
It is transmitted to host computer by serial ports or CAN bus, wherein CAN bus uses ISO11783 agreement.
It is needed in view of vehicular applications, device supports the input of 6-36V DC voltage, and input voltage passes through DC-DC module
LM2596 is converted into 5V, for the SGM8422 chip power supply for constituting low-pass filter.Meanwhile 5V is passed through into low pressure difference linearity pressure stabilizing
Device (LDO) LM1117 is converted into 3.3V, provides power supply for the digit chip of device.It is compatible different sharp in order to facilitate device use
The parallel beam sensor of voltage is encouraged, is introduced high precision digital-to-analog converter (DAC), DAC supply voltage is 15V, by DC-DC module
5V is boosted to obtain by TPS60185, and Digital Logic power supply then directly uses 3.3V, consistent with the level of STM32405 to guarantee.
DAC chip AD5412 is communicated by SPI interface with STM32F405, allows to export 5-10V DC power supply by programming.For
Enhancing driving capability concatenates the follower that LM358 is constituted after DAC and to reduce output impedance mentions High Output Current.
The above is only some embodiments of the invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement should be regarded as guarantor of the invention
Protect range.
Claims (6)
1. a kind of impulse type cereal flow transducer signal acquisition and processing apparatus, which is characterized in that including two-stage amplifying circuit and
Two-stage treatment framework, wherein two-stage amplifying circuit includes the first integrated single supply instrument amplifier, the second integrated single supply instrument
Amplifier and the amplification module in the first mixed signal microcontroller, the amplification module in the second mixed signal microcontroller, two
Grade processing framework includes Preprocessing Algorithm module in the first mixed signal microcontroller, in the second mixed signal microcontroller
Preprocessing Algorithm module and embedded 32 bit processor；Specifically:
First integrated single supply instrument amplifier, the second integrated single supply instrument amplifier are respectively used to obtain the first parallel girder
The cereal impact signal of sensor and the second parallel beam sensor, and the cereal impact signal of input is carried out at first order amplification
Reason, then exported respectively to the amplification module in the first mixed signal microcontroller, the amplification in the second mixed signal microcontroller
Module；
First mixed signal microcontroller, the second mixed signal microcontroller include built-in amplification module, AD conversion module
With the Preprocessing Algorithm module write using mixed signal microcontroller calculation resources, amplification module is used for filtered cereal
Impact signal carries out second level enhanced processing, and AD conversion module is used to carry out mould to the analog signal by second level enhanced processing
Number conversion, Preprocessing Algorithm module is used to carry out rejecting outliers to digital signal, dynamic property adjusts data prediction, processing
After output to embedded 32 bit processor；
Embedded 32 bit processor, for handle to pretreated digital signal and will treated cereal impact signal
It is sent to host computer.
2. impulse type cereal flow transducer signal acquisition and processing apparatus according to claim 1, which is characterized in that first
The single supply instrument that integrated single supply instrument amplifier and the second integrated single supply instrument amplifier are all made of model AD623 is put
Big device, and it is set as 64 times of amplifications.
3. impulse type cereal flow transducer signal acquisition and processing apparatus according to claim 1, which is characterized in that first
Integrated single supply instrument amplifier, the second integrated single supply instrument amplifier are mixed with the first mixed signal microcontroller, second
Low-pass filter is provided between signal microcontroller, the low-pass filter is second order Butterworth filter, including low drift
Track to track operational amplifier SGM8422 is moved, wherein SGM8422 is gathered around there are two amplifier.
4. impulse type cereal flow transducer signal acquisition and processing apparatus according to claim 1, which is characterized in that described
The transmission data pin of first mixed signal microcontroller and the second mixed signal microcontroller is handled with embedded 32 respectively
Two reception data pins of device are connected, the reception data of the first mixed signal microcontroller and the second mixed signal microcontroller
Pin is connected with the same transmission data pin of embedded 32 bit processor, forms shared signal wire.
5. impulse type cereal flow transducer signal acquisition and processing apparatus according to claim 1, which is characterized in that described
The integrated programmable that first mixed signal microcontroller and the second mixed signal microcontroller are all made of model HY16F188 increases
32 bit processors of beneficial amplification module and converter, amplification module gain are set as 2 times of amplifications.
6. impulse type cereal flow transducer signal acquisition and processing apparatus according to claim 1, which is characterized in that described
Embedded 32 bit processor is using the integrated floating-point operation of model STM32F405 and embedded 32 bit processor of DSP function.
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| CN201710820252.2A CN107806909B (en) | 2017-09-13 | 2017-09-13 | A kind of impulse type cereal flow transducer signal acquisition and processing apparatus |
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| CN201710820252.2A CN107806909B (en) | 2017-09-13 | 2017-09-13 | A kind of impulse type cereal flow transducer signal acquisition and processing apparatus |
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| CN110750057A (en) * | 2019-12-26 | 2020-02-04 | 江西飞尚科技有限公司 | Single-power-supply synchronous data acquisition device and acquisition method thereof |
| CN111637938A (en) * | 2020-06-10 | 2020-09-08 | 南京农业大学 | Impulse type grain mass flow signal noise reduction method |
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| CN2919199Y (en) * | 2006-06-23 | 2007-07-04 | 哈尔滨恒新实业发展有限责任公司 | Vortices modulated wave detecting circuit of ultrasonic gas flowmeter |
| JP2011033385A (en) * | 2009-07-30 | 2011-02-17 | Yokogawa Electric Corp | Coriolis mass flowmeter |
| CN101706299B (en) * | 2009-11-20 | 2011-03-30 | 合肥工业大学 | Coriolis mass flow transmitter based on DSP |
| CN102506951B (en) * | 2011-10-28 | 2013-05-01 | 合肥工业大学 | Method and system of digital driving following for Coriolis mass flowmeter |
| CN103969612A (en) * | 2013-01-28 | 2014-08-06 | 北京大学 | Multifunctional acquisition module for NMRI system |
| CN103630176B (en) * | 2013-12-17 | 2016-09-07 | 江苏大学 | Double plate difference impulse type cereal flow transducer signal processing apparatus and method |
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