CN105022846A - Multichannel synchronous data acquisition system - Google Patents
Multichannel synchronous data acquisition system Download PDFInfo
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- CN105022846A CN105022846A CN201510385461.XA CN201510385461A CN105022846A CN 105022846 A CN105022846 A CN 105022846A CN 201510385461 A CN201510385461 A CN 201510385461A CN 105022846 A CN105022846 A CN 105022846A
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Abstract
The invention discloses a multichannel synchronous data acquisition system, which is characterized in that the multichannel synchronous data acquisition system comprises that two paths have the same structure; each path is independently electrically connected with analog-digital conversion circuits through a plurality of microwave sensors capable of carrying out synchronous data acquisition; two paths of collected analog signals are both converted into digital signals; one path of analog-digital conversion circuit is electrically connected with a signal processing module through a first parallel bus; the other path of analog-digital conversion circuit is electrically connected with the signal processing module through a second parallel bus and is used for the synchronous acquisition and the function expansion of data; the signal processing module is electrically connected with an external RAM (Random Access Memory) circuit through a third parallel bus and is used for caching the acquisition data of the analog-digital conversion circuit; the signal processing module is electrically connected with a communication module circuit through a fourth parallel bus and is used for the high-speed transmission of the data; the communication module circuit is electrically connected with an upper computer through a reticle; and the upper computer stores data in an Excel form and is used for carrying out data analysis to obtain speed and concentration. The multichannel synchronous data acquisition system has the advantages of being reasonable in design, low in cost, high in transmission speed and the like.
Description
Technical field
The invention belongs to Data acquisition and transmit technical field, is a kind of multi-channel synchronous data acquisition system, is applicable in power plant the wind speed of First air pipeline and the high-speed synchronous data acquiring of coal powder density.
Background technology
In boiler of power plant, rational coal-air ratio is the clean-burning necessary condition of boiler, rational coal-air ratio can make coal dust Thorough combustion, avoid, because coal dust slagging scorification affects coal dust Thorough combustion on water-cooling wall, the wearing and tearing of boiler can being reduced again, improve the serviceable life of boiler.Expect that rational coal-air ratio just must detect the concentration of the wind speed of First air pipeline and coal dust in real time, and wind speed will be detected and concentration gathers the signal of microwave remote sensor with regard to needing and calculates.Therefore the signals collecting of First air air velocity duct and coal powder density is necessary.Power plant itself is a circumstance complication, the occasion that external influence factor is higher, and a First air pipeline real-time dynamic system especially, very strong real-time is needed to the data acquisition of the wind speed in pipeline and concentration signal and data processing, requires higher to the processing speed of system.Native system adopts microwave method to measure wind speed and coal powder density, based on the feature of microwave transmission and microwave itself, microwave is a high-frequency signal, this signal, through unloading ripple, obtains noise, then need to use the higher analog to digital converter of sampling rate, in industrial occasions, according to sampling thheorem, require that sample frequency is at more than 4 times of collected signal frequency, so native system requires high speed acquisition.Native system will adopt digital correlation to survey wind speed, adopts concentration decline method to survey concentration, has used digital correlation, so survey the synchronism that wind speed necessarily requires measured signal, measurement result so just can be made accurate owing to surveying wind speed.But according to the characteristic that installation and the microwave of on-the-spot microwave remote sensor are propagated in the waveguide, concentration signal and wind velocity signal have again certain relation, so require that wind velocity signal and concentration signal want synchronous acquisition.Capture card is in the market of a great variety, but multi-path data acquiring system traditionally, simulating signal will through multiway analog switch, and timesharing incision analog converter carries out circulating sampling, or adopt multiple AD sampling A/D chip, do not do synchronized sampling multichannel, real-time greatly.Secondly, most of acquisition system transfer rate is inadequate, and resolution is not high, cannot realize high-precision data acquisition.Therefore, the present invention is based on the deficiency that prior art exists, a kind of multi-channel synchronous data acquisition system is provided, realize once gathering, and multichannel synchrodata can be gathered, exist in the buffer memory of external RAM after conversion, be uploaded on PC through Ethernet, and store with Excel form.And native system can be expanded according to different data volumes and requirement.Up to now, have no about bibliographical information related to the present invention and practical application.
Summary of the invention
The object of the invention is, for solving the Real-Time Monitoring of power plant's First air air velocity duct and coal powder density, providing a kind of multi-channel synchronous data acquisition system, its circuit design is reasonable, cost is low, and transmission speed can reach 6MB/s, and can ensure integrality and the correctness of data; And Function Extension can be carried out according to different data volumes and requirement.
Realizing the technical solution used in the present invention is, a kind of multi-channel synchronous data acquisition system, it is characterized in that, it comprises: two line structures are identical, be electrically connected with analog to digital conversion circuit by multiple microwave remote sensors that can carry out synchronous data collection, all convert the simulating signal of two-way collection to digital signal, one road analog to digital conversion circuit is electrically connected with signal processing module by the first parallel bus, another road analog to digital conversion circuit is electrically connected with signal processing module by the second parallel bus, for synchronous acquisition and the Function Extension of data, signal processing module is electrically connected with external RAM circuit by the 3rd parallel bus, for the buffer memory of analog to digital conversion circuit image data, signal processing module is electrically connected with communication module circuit by the 4th parallel bus, for the high-speed transfer of data, communication module circuit is electrically connected with host computer by netting twine, host computer stores data with the form of Excel, for data analysis, draw speed and concentration.
The model of described signal processing module is ARM Cortex-M4 microcontroller.
The chip-shaped of analog-digital conversion circuit as described is AD7606.
The chip model of described external RAM circuit is IS62WV51216BLL.
The chip model of described communication module circuit is W5300.
Multi-channel synchronous data acquisition system of the present invention and traditional capture card simplified in comparison circuit design, reduce cost, and transmission speed can reach 6MB/s, and can ensure integrality and the correctness of data.Because have Function Extension, therefore the ability of larger data acquisition and transmission that made this system have, and can require system in addition Function Extension according to different data volumes, realize the transmission that large data high-speed is synchronous, therefore, native system is not only applicable to the synchronous data collection of power plant's primary air velocity and coal powder density, is also applicable to the collection of most of synchrodata, there is application prospect extensive, the advantages such as applicability is strong.
Embodiment
Fig. 1 is the theory diagram of multi-channel synchronous data acquisition system of the present invention;
Fig. 2 is the software flow pattern of multi-channel synchronous data acquisition system of the present invention;
Fig. 3 is signal processing module principle schematic in Fig. 1;
Fig. 4 is analog to digital conversion circuit principle schematic in Fig. 1;
Fig. 5 is Fig. 1 peripheral RAM circuit theory schematic diagram;
Fig. 6 is communication module circuit theory schematic diagram in Fig. 1.
As shown in Figure 1, multi-channel synchronous data acquisition system of the present invention comprises: two line structures are identical, be electrically connected with analog to digital conversion circuit by multiple microwave remote sensors that can carry out synchronous data collection, all convert the simulating signal of two-way collection to digital signal, one road analog to digital conversion circuit is electrically connected with signal processing module by the first parallel bus, another road analog to digital conversion circuit is electrically connected with signal processing module by the second parallel bus, for synchronous acquisition and the Function Extension of data, signal processing module is electrically connected with external RAM circuit by the 3rd parallel bus, for the buffer memory of analog to digital conversion circuit image data, signal processing module is electrically connected with communication module circuit by the 4th parallel bus, for the high-speed transfer of data, communication module circuit is electrically connected with host computer by netting twine, host computer stores data with the form of Excel, for data analysis, draw speed and concentration.The model of described signal processing module is ARM Cortex-M4 microcontroller.The chip-shaped of analog-digital conversion circuit as described is AD7606.The chip model of described external RAM circuit is IS62WV51216BLL.The chip model of described communication module circuit is W5300.
The simulating signal of microwave remote sensor collection is input to analog to digital conversion circuit, analog to digital conversion circuit mainly completes the translation function of simulating signal to digital signal, according to multi-channel synchronous data acquisition system, analog to digital conversion circuit is by the control of signal processing module, can according to rig-site utilization, make signal processing module control analog to digital conversion circuit and produce different sampling rates, make analog to digital conversion circuit complete data sampling and change, and send the digital signal obtained to signal processing module, be buffered in external RAM.
The operation of data buffer storage is subject to the control of signal processing module, and for the present embodiment a slice 8 channel data acquisition system, signal processing module only needs 8 tunnel synchronizing signals 1 to control the real-time past external RAM write data of analog to digital conversion circuit.And for the acquisition system adding expansion, as 8 tunnel synchronizing signals 2 in Fig. 1, signal processing module sends address signal by the address bus of parallel bus 2 to analog to digital conversion circuit, and analog to digital conversion circuit compares the address signal received, be confirmed whether selected, thus successively by conversion data stored in external RAM.
Communication module main circuit will complete the communication function of host computer and slave computer, and multi-channel synchronous data acquisition system of the present invention is using slave computer as server, and host computer is as client.Host computer carrys out configuration communication parameter according to the Ethernet parameter configuration of slave computer, and after parameter configuration is complete, after slave computer receives initiation command, data start to gather, and after slave computer receives and ceases and desist order, data acquisition stops.The data volume of the detection external RAM that signal processing module is real-time, because transfer rate is high, external RAM is divided into two buffer zones by multi-channel synchronous data acquisition system of the present invention, the data of analog to digital conversion circuit collection are first put in first buffer zone, after first phase buffer is piled, the data of first buffer zone are passed through Ethernet, namely netting twine to upload on PC and stores, while first buffer zone uploading data, the data of analog to digital conversion circuit collection are put in second buffer zone, circulate data upload to PC so successively.
As shown in Figure 2, the software flow of multi-channel synchronous data acquisition system of the present invention, first initialization ethernet communication module, comprise host interface and arrange, the distribution of network information setting and inner TX/RX storer.Successively to MAC Address in multi-channel synchronous data acquisition system, subnet mask, local IP address, 8 registers such as local side slogan are configured, and all the other registers adopt default configuration.Initialization terminates rear multi-channel synchronous data acquisition system and opens port 0, and is set to server mode, selects ICP/IP protocol to transmit, enters listening state, when detect host computer shake hands order time connect.After connecting, whether there are the data from host computer by the external interrupt inquiry chip receiving register that configured in advance is good, if had, receive data, after being disposed, continue inquiry.If receive the order customized in advance, then system starts to start collection, and the data of collection are uploaded to host computer by Ethernet after SRAM ping-pong buffer, data acquisition is complete, automatically can be stopped gathering by server end, the data uploaded, through host computer analyzing and processing, draw wind speed and concentration.
As shown in Figure 3, signal processing module adopts ARM Cortex-M4 microcontroller.Each pin of the microcontroller used as shown in Figure 3.
As shown in Figure 4, analog to digital conversion circuit adopts AD7606 chip.AD7606 is 16 that ADI company produces, 8 Channel Synchronous sampling modulus data acquisition system (DAS).Device inside built-in analog input clamping protection, second order frequency overlapped-resistable filter, follow the tracks of hold amplifier, 16 Charge scaling gradual approaching A/D converters (ADC), flexibly digital filter, 2.5V reference voltage source, reference voltage buffering and high speed serialization and parallel interface.AD7606 adopts 5V single power supply, and can process ± 10V and the ± true bipolar input signal of 5V, within the scope of positive and negative 10V ,-three dB bandwidth representative value is 23KHz.Within the scope of ± 5V, the representative value of-three dB bandwidth is 15KHz.All passages all can be sampled with the throughput rate up to 200KSPS simultaneously.Input clamp protection circuits can stand the voltage up to ± 16.5V.Which kind of no matter with sample frequency work.A slice AD7606 can complete the synchronized sampling of 8 channel datas, and because AD7606 is 16 acquisition chips, itself and the connected mode of signal processing module adopt the mode of 16 BITBUS network to be connected.Due in gatherer process, only need to read data from AD7606, so only use reading signal lines, as 16 signal wires of FSMC0 to the FSMC15 in figure, be connected with FSMC0 to the FSMC15 correspondence of Cortex-M4.Resistance R14 does not weld, and selects Parallel Interface Communication.This design have employed parallel interface.Wherein PA1, PA2, PA3 pin of AD7606 is used for arranging employing frequency, pin PA4 is used for arranging input range, pin PA5 is reset mouth line, pin PB0 is general purpose timer pin, pulse is exported with this pin, start the conversion of AD7606, pin PB1 is set to interrupting input mouth, negative edge triggers, pin PG12 is the sheet choosing of AD7606, and be connected with the 4th piecemeal of the bank1 of FSMC, FSMCNOE reads enable pin, to communicate with FSMC sequential through as above connecting and configuring each pin, can data acquisition be realized.
As Fig. 5, external RAM circuit is data caching circuit, selects IS62WV51216BLL as storage, and this sram chip adopts the TSOP2 encapsulation of biserial 44 pin, and institutional framework is two-forty, the power consumption static random memory with low of 512K*16bit.It communicates with ARM and still adopts parallel port mode, connects data bus and address bus, and selects second piecemeal of the bank1 of FSMC, is connected with the FSMCNE2 of signal processing module, realizes the read data of data caching circuit and writes data.The process of data buffer storage and transmission is pressed ping-pong buffer principle and is realized, for different collection requirements, can according to the size of the data volume gathered, and corresponding quantity and the number increasing cache chip, realizes the buffer memory of data.
As Fig. 6, communication module circuit is real-time Transmission in order to realize sampled data and carries out real-time Communication for Power with host computer, selects the hardware Ethernet protocol chips W 5300 of Winzet company to build mixed-media network modules mixed-media.The integrated 10/100 M ethernet controller MAC of this chip internal and TCP/ IP protocol stack, support that 8 separate ports connect simultaneously, traffic rate reaches as high as 80 Mb/s; Support 8/16 bit data bus with host interface, support 2 kinds of host interface modes; There is the TX/RX storer of 128 KB inside, can according to its distribution of port communication data throughout dynamic conditioning.The requirement of acquisition system can be reached.This chip is connected with the 3rd piecemeal of the form of data bus with the BANK1 of signal processing module, i.e. pin PG10, realizes data transmission.Use PA0 as interrupt inquiry pin, the pin state of each register of real-time query W5300, realizes the connection of W5300, the operation of disconnection and other states.
Claims (5)
1. a multi-channel synchronous data acquisition system, it is characterized in that, it comprises: two line structures are identical, be electrically connected with analog to digital conversion circuit by multiple microwave remote sensors that can carry out synchronous data collection, all convert the simulating signal of two-way collection to digital signal, one road analog to digital conversion circuit is electrically connected with signal processing module by the first parallel bus, another road analog to digital conversion circuit is electrically connected with signal processing module by the second parallel bus, for synchronous acquisition and the Function Extension of data, signal processing module is electrically connected with external RAM circuit by the 3rd parallel bus, for the buffer memory of analog to digital conversion circuit image data, signal processing module is electrically connected with communication module circuit by the 4th parallel bus, for the high-speed transfer of data, communication module circuit is electrically connected with host computer by netting twine, host computer stores data with the form of Excel, for data analysis, draw speed and concentration.
2. multi-channel synchronous data acquisition system according to claim 1, is characterized in that, the model of described signal processing module is ARM Cortex-M4 microcontroller.
3. multi-channel synchronous data acquisition system according to claim 1, is characterized in that, the chip-shaped of analog-digital conversion circuit as described is AD7606.
4. multi-channel synchronous data acquisition system according to claim 1, is characterized in that, the chip model of described external RAM circuit is IS62WV51216BLL.
5. multi-channel synchronous data acquisition system according to claim 1, is characterized in that, the chip model of described communication module circuit is W5300.
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| CN106059585A (en) * | 2016-05-30 | 2016-10-26 | 株洲中车时代电气股份有限公司 | Data sampling method and sampling system |
| CN107911119A (en) * | 2017-12-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of gathered data processing system applied to security monitoring device |
| CN109541289A (en) * | 2018-10-09 | 2019-03-29 | 山东科技大学 | Lithium battery group single battery electric current high-precise synchronization in parallel acquires experimental provision |
| CN109901128A (en) * | 2017-12-08 | 2019-06-18 | 南京理工大学 | Microwave pit signal processing system based on FPGA |
| CN111679993A (en) * | 2020-05-29 | 2020-09-18 | 湖南苍树航天科技有限公司 | Multichannel parallel synchronous bus controller |
| CN111683305A (en) * | 2020-05-19 | 2020-09-18 | 烽火通信科技股份有限公司 | ODUk channel distribution method and system |
| CN111767240A (en) * | 2020-09-03 | 2020-10-13 | 深圳市永联科技股份有限公司 | Automatic construction method of serial communication protocol |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059585A (en) * | 2016-05-30 | 2016-10-26 | 株洲中车时代电气股份有限公司 | Data sampling method and sampling system |
| CN109901128A (en) * | 2017-12-08 | 2019-06-18 | 南京理工大学 | Microwave pit signal processing system based on FPGA |
| CN107911119A (en) * | 2017-12-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of gathered data processing system applied to security monitoring device |
| CN109541289A (en) * | 2018-10-09 | 2019-03-29 | 山东科技大学 | Lithium battery group single battery electric current high-precise synchronization in parallel acquires experimental provision |
| CN111683305A (en) * | 2020-05-19 | 2020-09-18 | 烽火通信科技股份有限公司 | ODUk channel distribution method and system |
| CN111679993A (en) * | 2020-05-29 | 2020-09-18 | 湖南苍树航天科技有限公司 | Multichannel parallel synchronous bus controller |
| CN111679993B (en) * | 2020-05-29 | 2021-08-17 | 湖南苍树航天科技有限公司 | Multichannel parallel synchronous bus controller |
| CN111767240A (en) * | 2020-09-03 | 2020-10-13 | 深圳市永联科技股份有限公司 | Automatic construction method of serial communication protocol |
| CN111767240B (en) * | 2020-09-03 | 2020-12-11 | 深圳市永联科技股份有限公司 | Automatic construction method of serial communication protocol |
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Application publication date: 20151104 |