CN104777353A - Multichannel low-current collection method and system based on single chip microcomputer control - Google Patents
Multichannel low-current collection method and system based on single chip microcomputer control Download PDFInfo
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- CN104777353A CN104777353A CN201510139794.4A CN201510139794A CN104777353A CN 104777353 A CN104777353 A CN 104777353A CN 201510139794 A CN201510139794 A CN 201510139794A CN 104777353 A CN104777353 A CN 104777353A
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Abstract
The invention discloses a multichannel low-current collection system based on single chip microcomputer control. The system comprises a multi-channel relay switching circuit, a multi-channel selection control circuit, a multi-channel sensor, a current-to-voltage conversion circuit, an A/D (analog/digital) sampling switching circuit, a single chip microcomputer processor, an SD card storage circuit and an LED nixie tube display circuit. Multi-channel low current can be collected and stored in real time, a single chip microcomputer is adopted for control, an interface circuit is used for communication with an upper computer, and collected data are automatically uploaded to the upper computer through the interface circuit. The system is simple in structure, easy to implement, higher in accuracy, small in error and capable of being widely applied to a multichannel low-current collection circuit which has higher requirements for accuracy of collection result and is easy to expand.
Description
Technical field
The present invention relates to a kind of small area analysis real-time acquisition system, particularly a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method and system.
Background technology
In the fields such as laboratory, automated detection system and industrial control system, the various acquisition system meeting different demand is needed to realize the collection of computing machine to field data.Data acquisition system (DAS) general is at present use analog switch switching channel mostly, resistance is large, each passage non-fully is independent, mostly can only gather some universal signals, the highly versatile of product, but in each field especially in experiment multichannel small area analysis collection also exist the acquisition interval time longer, arrange that amendment parameter is complicated, poor for applicability, precision is low, error is large shortcoming, make image data integrality, degree of accuracy be greatly affected.
Summary of the invention
An object of the present invention is to provide a kind of based on monolithic processor controlled hyperchannel small area analysis real-time acquisition system, the integrality that Solving Multichannel small area analysis gathers, the problem of degree of accuracy.
The invention provides a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method, step comprises:
The control input end of multicircuit relay commutation circuit connects the output terminal of multi-path choice control circuit, and the signal input part of described multicircuit relay commutation circuit gathers multiple sensor current signal, described current signal is input to electric current changing voltage circuit;
The described current signal received is converted to voltage signal by described electric current changing voltage circuit, then by A/D data sampling change-over circuit output digit signals to processor of single chip computer;
Described processor of single chip computer controls described multi-path choice control circuit, and then controls the power input of multicircuit relay commutation circuit, controls switching channel;
Described processor of single chip computer by the data-storing handled well on the SD card of SD card memory circuit;
Described processor of single chip computer is by LED digital pipe display circuit, and Serial output shows data;
The data handled well, by interface circuit, are uploaded to host computer by described processor of single chip computer in real time, and processor of single chip computer receives the control command that described host computer issues simultaneously, two-way transmission signals.
Further, described processor of single chip computer accepts the digital signal data of A/D data sampling conversion electricity, data are processed, record, store, acquisition parameter, the acquisition interval parameter of processor of single chip computer control A/D data sampling change-over circuit simultaneously, and adjustable acquisition precision and speed, two-way transmission signals.
Further, described SD card storage circuit is logical becomes 3V voltage by 5V voltage transitions, for outside SD card provides power supply.
The present invention also provides a kind of based on monolithic processor controlled hyperchannel small area analysis real-time acquisition system, comprises multicircuit relay commutation circuit, multi-path choice control circuit, multiple sensor, electric current changing voltage circuit, A/D data sampling change-over circuit, processor of single chip computer, LED digital pipe display circuit, SD card storage circuit and interface circuit;
The power input of described multicircuit relay commutation circuit connects the output terminal of described multi-path choice control circuit, and the output terminal of described multicircuit relay commutation circuit is connected with described electric current changing voltage circuit input end;
The output terminal of described electric current changing voltage circuit connects the input end of A/D data sampling change-over circuit;
The output terminal of described A/D data sampling change-over circuit connects processor of single chip computer input end;
The output terminal of described multi-path choice control circuit connects the power input of multicircuit relay commutation circuit;
The input end of described processor of single chip computer is connected by the output terminal of spi bus with described A/D data sampling change-over circuit;
The output terminal of described processor of single chip computer is connected with the input end of SD card storage circuit;
The input end of LED digital pipe display circuit is connected with described processor of single chip computer through iic bus by control chip;
The output terminal of described processor of single chip computer is connected with interface circuit input end through RS232 by inner serial port;
The output terminal of described processor of single chip computer is connected with the input end of multi-path choice control circuit by Darlington transistor driver
Beneficial effect of the present invention is, uses provided by the invention a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method and system farthest can keep the real-time of data waveform and integrality, precision is high, error is little; Simultaneously structure of the present invention simple, be easy to realize, low in energy consumption, the inquiry of historical data convenient, can be widely used in higher to the accuracy requirement of collection result and be easy in the hyperchannel small area analysis Acquisition Circuit expanded.
Accompanying drawing explanation
Figure 1 shows that a kind of theory diagram based on monolithic processor controlled hyperchannel small area analysis real-time acquisition system of the present invention.
Figure 2 shows that multicircuit relay commutation circuit and electric current changing voltage circuit theory diagrams.
Figure 3 shows that multi-path choice control circuit schematic diagram.
Figure 4 shows that digital pipe display circuit schematic diagram.
Figure 5 shows that SD card storage circuit schematic diagram.
Figure 6 shows that interface circuit schematic diagram.
Embodiment
Hereafter will describe the specific embodiment of the invention in detail in conjunction with concrete accompanying drawing.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they can mutually be combined thus be reached better technique effect.In the accompanying drawing of following embodiment, the identical label that each accompanying drawing occurs represents identical feature or parts, can be applicable in different embodiment.
Figure 1 shows that a kind of theory diagram based on monolithic processor controlled hyperchannel small area analysis acquisition system of the present invention.
Figure 2 shows that multicircuit relay commutation circuit and electric current changing voltage circuit theory diagrams.
Figure 3 shows that multi-path choice control circuit schematic diagram.
Figure 4 shows that digital pipe display circuit schematic diagram.
Figure 5 shows that SD card storage circuit schematic diagram.
Figure 6 shows that interface circuit schematic diagram.
The invention provides a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method, step comprises:
The control input end of multicircuit relay commutation circuit 3 connects the output terminal of multi-path choice control circuit 2, and the signal input part of described multicircuit relay commutation circuit 3 gathers multiple sensor 1 current signal, described current signal is input to electric current changing voltage circuit;
The described current signal received is converted to voltage signal by described electric current changing voltage circuit, then by A/D data sampling change-over circuit 5 output digit signals to processor of single chip computer 6;
Described processor of single chip computer 6 controls described multi-path choice control circuit 2, and then controls the power input of multicircuit relay commutation circuit 3, controls switching channel;
Described processor of single chip computer 6 by the data-storing handled well on the SD card of SD card memory circuit 8;
Described processor of single chip computer 6 is by LED digital pipe display circuit 7, and Serial output shows data;
The data handled well, by interface circuit 9, are uploaded to host computer 10 by described processor of single chip computer 6 in real time, and processor of single chip computer 6 receives the control command that described host computer 10 issues simultaneously, two-way transmission signals.
Further, described processor of single chip computer 6 accepts the digital signal data of A/D data sampling change-over circuit 5, data are processed, record, store, acquisition parameter, the acquisition interval parameter of processor of single chip computer 6 control A/D data sampling change-over circuit 5 simultaneously, and adjustable acquisition precision and speed, two-way transmission signals.
Further, 5V voltage transitions is become 3V voltage by described SD card storage circuit 8, for described SD card provides power supply.
As shown in figures 1 to 6, the present invention also provides a kind of based on monolithic processor controlled hyperchannel small area analysis real-time acquisition system, comprises multicircuit relay commutation circuit 3, multi-path choice control circuit 2, multiple sensor 1, electric current changing voltage circuit 4, A/D data sampling change-over circuit 5, processor of single chip computer 6, LED digital pipe display circuit 7, SD card storage circuit 8 and interface circuit 9;
The power input of described multicircuit relay commutation circuit 3 connects the output terminal of described multi-path choice control circuit 2, and the output terminal of described multicircuit relay commutation circuit 3 is connected with described electric current changing voltage circuit 4 input end;
The output terminal of described electric current changing voltage circuit 4 connects the input end of A/D data sampling change-over circuit 5;
The output terminal of described A/D data sampling change-over circuit 5 connects processor of single chip computer 6 input end;
The output terminal of described multi-path choice control circuit 2 connects the power input of multicircuit relay commutation circuit 3;
The input end of described processor of single chip computer 6 is connected by the output terminal of spi bus with described A/D data sampling change-over circuit 5;
The output terminal of described processor of single chip computer 6 is connected with the input end of SD card storage circuit 8;
The input end of LED digital pipe display circuit 7 is connected with described processor of single chip computer 6 through iic bus by control chip;
The output terminal of described processor of single chip computer 6 is connected with interface circuit 9 input end through RS232 by inner serial port;
The output terminal of described processor of single chip computer 6 is connected with the input end of multi-path choice control circuit 2 by Darlington transistor driver.
Embodiment:
The first step: processor of single chip computer 6 Initialize installation, arranges acquisition mode, the frequency acquisition of A/D data sampling change-over circuit 5.
Second step: processor of single chip computer 6 judges mode of operation, when mode of operation is non-acquired pattern, system enters dormancy state; When mode of operation is drainage pattern, processor of single chip computer 6 outputs control signals to multi-path choice control circuit 2, selects acquisition channel.
3rd step: multicircuit relay commutation circuit 3 acquisition state is the channel current signal of "ON", exports electric current changing voltage circuit 4 to.
4th step: electric current changing voltage circuit 4, by series connection precision resister, converts small area analysis to voltage, exports A/D data sampling change-over circuit 5 to; A/D data sampling change-over circuit 5 inputs to processor of single chip computer 6 after voltage being carried out process and A/D conversion.
5th step: processor of single chip computer 6 pairs of data are carried out process and calculated, and the data handled well carry out storing, transmitting.
6th step: data are inputed to LED digital pipe display circuit 7 by processor of single chip computer 6, display data message.
7th step: data are inputed to SD card storage circuit 8 by the frame format drafted by processor of single chip computer 6, is saved to data message on outside SD card, prevents loss of data.
8th step: data packing is uploaded to host computer 10 by interface circuit 9 by the frame format drafted by processor of single chip computer 6.
So far complete based on monolithic processor controlled hyperchannel small area analysis Real-time Collection.
Use provided by the invention a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method and system farthest can keep the real-time of data waveform and integrality, precision is high, error is little; Simultaneously structure of the present invention simple, be easy to realize, low in energy consumption, the inquiry of historical data convenient, can be widely used in higher to the accuracy requirement of collection result and be easy in the hyperchannel small area analysis Acquisition Circuit expanded.
Although give some embodiments of the present invention, it will be understood by those of skill in the art that without departing from the spirit of the invention herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of interest field of the present invention.
Claims (4)
1., based on a monolithic processor controlled hyperchannel small area analysis acquisition method, it is characterized in that, step comprises:
The control input end of multicircuit relay commutation circuit connects the output terminal of multi-path choice control circuit, and the signal input part of described multicircuit relay commutation circuit gathers multiple sensor current signal, described current signal is input to electric current changing voltage circuit;
The described current signal received is converted to voltage signal by described electric current changing voltage circuit, then by A/D data sampling change-over circuit output digit signals to processor of single chip computer;
Described processor of single chip computer controls described multi-path choice control circuit, and then controls the power input of multicircuit relay commutation circuit, controls switching channel;
Described processor of single chip computer by the data-storing handled well on the SD card of SD card memory circuit;
Described processor of single chip computer is by LED digital pipe display circuit, and Serial output shows data;
The data handled well, by interface circuit, are uploaded to host computer by described processor of single chip computer in real time, and processor of single chip computer receives the control command that described host computer issues simultaneously, two-way transmission signals.
2. as claimed in claim 1 a kind of based on monolithic processor controlled hyperchannel small area analysis acquisition method, it is characterized in that, described processor of single chip computer accepts the digital signal data of A/D data sampling conversion electricity, data are processed, record, store, acquisition parameter, the acquisition interval parameter of processor of single chip computer control A/D data sampling change-over circuit simultaneously, and adjustable acquisition precision and speed, two-way transmission signals.
3. one as claimed in claim 1 is based on monolithic processor controlled hyperchannel small area analysis acquisition method, it is characterized in that, described SD card storage circuit is logical becomes 3V voltage by 5V voltage transitions, for outside SD card provides power supply.
4. one kind based on monolithic processor controlled hyperchannel small area analysis real-time acquisition system, it is characterized in that, comprise multicircuit relay commutation circuit, multi-path choice control circuit, multiple sensor, electric current changing voltage circuit, A/D data sampling change-over circuit, processor of single chip computer, LED digital pipe display circuit, SD card storage circuit and interface circuit;
The power input of described multicircuit relay commutation circuit connects the output terminal of described multi-path choice control circuit, and the output terminal of described multicircuit relay commutation circuit is connected with described electric current changing voltage circuit input end;
The output terminal of described electric current changing voltage circuit connects the input end of A/D data sampling change-over circuit;
The output terminal of described A/D data sampling change-over circuit connects processor of single chip computer input end;
The output terminal of described multi-path choice control circuit connects the power input of multicircuit relay commutation circuit;
The input end of described processor of single chip computer is connected by the output terminal of spi bus with described A/D data sampling change-over circuit;
The output terminal of described processor of single chip computer is connected with the input end of SD card storage circuit;
The input end of LED digital pipe display circuit is connected with described processor of single chip computer through iic bus by control chip;
The output terminal of described processor of single chip computer is connected with interface circuit input end through RS232 by inner serial port;
The output terminal of described processor of single chip computer is connected with the input end of multi-path choice control circuit by Darlington transistor driver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510139794.4A CN104777353A (en) | 2015-03-27 | 2015-03-27 | Multichannel low-current collection method and system based on single chip microcomputer control |
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| CN201510139794.4A CN104777353A (en) | 2015-03-27 | 2015-03-27 | Multichannel low-current collection method and system based on single chip microcomputer control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093546A (en) * | 2016-07-27 | 2016-11-09 | 江南大学 | A kind of Measurement of Micro Current |
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| CN103176122A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Multi-channel data acquisition device |
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| KR950008432B1 (en) * | 1990-06-15 | 1995-07-31 | 대우전자주식회사 | Apparatus for testing scr |
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