CN206921087U - The double sampled acquisition system of multichannel thunder signal - Google Patents
The double sampled acquisition system of multichannel thunder signal Download PDFInfo
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- CN206921087U CN206921087U CN201720689145.6U CN201720689145U CN206921087U CN 206921087 U CN206921087 U CN 206921087U CN 201720689145 U CN201720689145 U CN 201720689145U CN 206921087 U CN206921087 U CN 206921087U
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Abstract
The utility model discloses a kind of double sampled acquisition system of multichannel thunder signal, it is characterised in that：System is based on DSP+FPGA+ARM frameworks, including collecting unit, data fusion unit, signal processing unit, data communication units, and the signal of the collecting unit transmits to data fusion unit, data communication units are sent to after the processing of signal processing unit；The collecting unit is made up of analog-to-digital conversion module ADC；The data fusion unit is using fpga chip；The signal processing unit uses DSP Processor；The core devices of the data communication units are ARM, in addition to hard disk, network interface card, have UART interface and USB interface.The utility model is directed to the multichannel synchronousing collection system of microphone array lighting location device design, can meet the collection requirement of electromagnetic pulse signal and thunder signal, and can save data transfer bandwidth.
Description
Technical field
The utility model belongs to lightning monitoring technical field, more particularly to a kind of double sampled collection system of multichannel thunder signal
System.
Background technology
Distribution lightning protection is a very weak but very important ring in power network lightning protection research；For distribution line coverage rate
The characteristics of product is wide, large number of, the lightening activity in a region is monitored, is an inexpensive, efficient solution.
Microphone array lighting location device utilizes multiple microphone array, and each microphone is reached to thunder and lightning acoustic signals
Time difference resolved, so as to orient the position of lightning strike spot, realize that single assembly enters to the lightening activity in a region
Row monitoring.
The synchronous acquisition of signal, and the real-time Transmission of data are carried out for multiple microphone, is back-end realization thunder and lightning letter
The important prerequisite of number location algorithm.Electromagnetic signal is produced in thunder and lightning generating process, during thundercloud discharge, the electromagnetic signal acts on biography
An electromagnetic pulse signal can be produced on sound device, the electromagnetic pulse signal is algorithm detection, judges that thunder and lighting process occurs prerequisite
Condition, meanwhile, the electromagnetic pulse signal needs to be gathered with higher sample frequency；In addition, for the thunder signal for positioning,
Relatively low sample frequency can be used.
In view of this, it is necessary to which a kind of multichannel synchronousing collection for the design of microphone array lighting location device is provided
System.
The content of the invention
The purpose of this utility model is：In order to meet the collection requirement of two kinds of signals, and data transfer is saved as much as possible
Bandwidth, the utility model devise a kind of double sampled acquisition system of multichannel thunder signal.
To achieve these goals, technical scheme is used by the utility model：A kind of multichannel thunder signal is double to adopt
Sample acquisition system, it is characterised in that：System is based on DSP+FPGA+ARM frameworks, including collecting unit, data fusion unit, signal
Processing unit, data communication units, the signal of the collecting unit are transmitted to data fusion unit, the place through signal processing unit
Data communication units are sent to after reason；The collecting unit is made up of analog-to-digital conversion module ADC；The data fusion unit uses
Be fpga chip；The signal processing unit uses DSP Processor；The core devices of the data communication units are ARM, also
Including hard disk, network interface card, there is UART interface and USB interface.
Further, the analog-to-digital conversion module ADC of the collecting unit has multi pass acquisition passage, wherein 1 road signal is adopted
With 100KHz sample rate, for receiving electromagnetic pulse signal, remaining road signal uses 20KHz sample rate, for receiving thunder
Acoustical signal.
Further, the ADC that the collecting unit uses is that the model ADS1278, ADC of ADI companies quantity are one
It is individual or multiple.
Further, the acquisition system is entered using the fpga chip of the data fusion unit to one or more pieces ADC
Row controls and receives the data signal of ADC chips upload.
Further, the data that the FPGA uploads the ADC received, it is single that in-built FIFO cachings are stored in
Member, and it is frame data to handle, and frame data then are sent into DSP Processor.
Further, I2C interface and frame synchronization serial line interface are realized using FPGA hardware logic, wherein I2C interface is used
In configuration ADS1278 register, frame synchronization serial line interface is used to receive the data signal after analog-to-digital conversion.
Further, the FPGA models are the xc6slx45T of Xilinx companies.
Further, DSP Processor, which receives, is transmitted through next frame data from FPGA, carries out down-sampled handle, at filtering respectively
Reason, time frequency analysis, and the data after processing are sent to ARM.
Further, the DSP Processor model is the TMS320C6747 of TI companies.
Further, the ARM uses the model iMX6Q processors of TM.
The beneficial effects of the utility model are：Compared with prior art, the utility model is determined for microphone array thunder and lightning
The multichannel synchronousing collection system of position device design, can meet the collection requirement of electromagnetic pulse signal and thunder signal, and energy
Save data transfer bandwidth.
Brief description of the drawings
Fig. 1 is system block diagram of the present utility model.
Fig. 2 be it is of the present utility model collection, integrated unit block diagram.
Fig. 3 is data communication units block diagram of the present utility model.
Embodiment
By combination accompanying drawing described further below it will be further appreciated that the characteristics of the utility model and advantage.There is provided
Embodiment is only the explanation to the utility model method, remaining content without limiting the utility model announcement in any way.
The double sampled acquisition system of multichannel thunder signal that the utility model embodiment provides, totally 20 tunnel signal acquisition, its
In 1 road signal use 100KHz sample rate, for receiving electromagnetic pulse signal, in addition 19 road signals use 20KHz sampling
Rate, for receiving thunder signal；System is transmitted using Ethernet, integrates ICP/IP protocol；System includes usb interfaces, and uart connects
Mouthful, the data for modules such as temperature sensor, electronic compass, GPS communicate.
System is based on DSP+FPGA+ARM frameworks, mainly including collecting unit, data fusion unit, signal processing unit,
Data communication units.The functional block diagram of the double sampled acquisition system of multichannel thunder signal is as shown in Figure 1.
Collecting unit is mainly made up of analog-to-digital conversion module (ADC), and the ADC that the present embodiment uses is the model of ADI companies
There are 8 road synchronous acquisition passages, 24 sampling precisions for ADS1278, model ADC, highest sample rate can reach 144KHz.By
3 ADS1278 are used in the collecting unit with 20 road signals, the present embodiment, wherein 1 road signal uses 100KHz sampling
Rate, for receiving electromagnetic pulse signal, 19 road signals use 20KHz sample rate in addition, for receiving thunder signal.Utilize
FPGA is controlled and received the data signal that each ADC chips upload to multi-disc ADC.
The core of data fusion unit is FPGA, and the FPGA models that the present embodiment uses are Xilinx companies
Xc6slx45T, I2C interface and frame synchronization serial line interface are realized using FPGA hardware logic, wherein I2C interface is used to configure
ADS1278 register, frame synchronization serial line interface are used to receive the data signal after analog-to-digital conversion；FPGA is each by what is received
The data that ADC is uploaded, are stored in in-built FIFO buffer units, each channel data are ranked up according to certain format,
Frame head and postamble are added, forms complete frame data, and frame data are sent to DSP, above-mentioned functional block diagram is as shown in Figure 2.
Signal processing unit is completed in dsp, and the DSP models that the present embodiment uses are the TMS320C6747 of TI companies,
DSP, which receives, is transmitted through next frame data from FPGA, first carries out down-sampled processing, the 100KHz samplings except retaining electromagnetic signal passage
Rate, the sample rate of other passages are reduced to 20KHz, can so reduce data volume and data communication bandwidth；Then, it is real in dsp
A wave digital lowpass filter is showed, processing is filtered to the frame signal after down-sampled, improves signal quality.In addition, in DSP
In time frequency analysis is carried out to frame signal, the time and frequency parameter of signal is preserved, and upload, for later stage further signal processing algorithm
Use.A series of signal data after processing is sent to ARM by DSP.
The main core devices of data communication units are ARM, and the present embodiment uses the model of TM
IMX6Q processors, the processor are the core A9 of technical grade 4, and highest dominant frequency can reach 1GHz.ARM runs (SuSE) Linux OS, main
The task of data communication is completed, various kinds of sensors signal, including temperature are received including by UART interface and USB interface
Sensor, electronic compass, GPS etc.；And upload these signals by Ethernet with multichannel microphone signal, or local guarantor
Deposit, its functional block diagram is as shown in Figure 3.
The course of work of the present utility model is：Collecting unit is completed by analog-to-digital conversion module (ADC), by the letter after digitlization
Number it is transferred to data fusion unit；Data fusion is completed by the logic inside FPGA, it is main include fusion multichannel adc data,
Integral data form, addition frame head and postamble；Complete frame data are sent to signal processing unit, DSP by data fusion unit
As the core of signal processing unit, frame data are filtered, sample rate conversion, at the data signal such as time frequency analysis
Reason, and the data after having handled are sent to ARM；ARM mainly completes the task of data communication, including the original by multi channel signals
Beginning data and the findings data after DSP has been handled upload host computer by Ethernet and shown, can also pass through Sata hard disks
Local preservation is carried out, by USB interface and UART interface, system receives the moulds such as external temperature sensor, electronic compass and GPS
The data of block, as thunder and lightning acoustical signal processing, the assistance data parameter of positioning.
Claims (10)
- A kind of 1. double sampled acquisition system of multichannel thunder signal, it is characterised in that：System is based on DSP+FPGA+ARM frameworks, bag Collecting unit, data fusion unit, signal processing unit, data communication units are included, the signal of the collecting unit is transmitted to number According to integrated unit, data communication units are sent to after the processing of signal processing unit；The collecting unit is by analog-to-digital conversion mould Block ADC is formed；The data fusion unit is using fpga chip；The signal processing unit uses DSP Processor；It is described The core devices of data communication units are ARM, in addition to hard disk, network interface card, have UART interface and USB interface.
- A kind of 2. double sampled acquisition system of multichannel thunder signal according to claim 1, it is characterised in that：The collection The analog-to-digital conversion module ADC of unit has multi pass acquisition passage, wherein 1 road signal uses 100KHz sample rate, for receiving Electromagnetic pulse signal, remaining road signal uses 20KHz sample rate, for receiving thunder signal.
- A kind of 3. double sampled acquisition system of multichannel thunder signal according to claim 2, it is characterised in that：The collection The quantity that the ADC that unit uses is the model ADS1278, ADC of ADI companies is one or more.
- 4. a kind of double sampled acquisition system of multichannel thunder signal according to claims 1 to 3 any one, its feature exist In：The acquisition system is controlled to one or more pieces ADC using the fpga chip of the data fusion unit and receives ADC The data signal that chip uploads.
- A kind of 5. double sampled acquisition system of multichannel thunder signal according to claim 4, it is characterised in that：The FPGA The data that the ADC received is uploaded, in-built FIFO buffer units are stored in, and it is frame data to handle, then by frame Data are sent to DSP Processor.
- A kind of 6. double sampled acquisition system of multichannel thunder signal according to claim 5, it is characterised in that：Utilize FPGA Hardware logic realize I2C interface and frame synchronization serial line interface, wherein I2C interface is used for the register for configuring ADS1278, and frame is same Step serial line interface is used to receive the data signal after analog-to-digital conversion.
- A kind of 7. double sampled acquisition system of multichannel thunder signal according to claim 6, it is characterised in that：The FPGA Model is the xc6slx45T of Xilinx companies.
- A kind of 8. double sampled acquisition system of multichannel thunder signal according to claim 5, it is characterised in that：DSP processing Device, which receives, is transmitted through next frame data from FPGA, carries out down-sampled processing, filtering process, time frequency analysis respectively, and by after processing Data are sent to ARM.
- A kind of 9. double sampled acquisition system of multichannel thunder signal according to claim 8, it is characterised in that：The DSP Processor model is the TMS320C6747 of TI companies.
- A kind of 10. double sampled acquisition system of multichannel thunder signal according to claim 5, it is characterised in that：The ARM Using the model iMX6Q processors of TM.
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| CN201720689145.6U CN206921087U (en) | 2017-06-14 | 2017-06-14 | The double sampled acquisition system of multichannel thunder signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110287132A (en) * | 2019-05-17 | 2019-09-27 | 全球能源互联网研究院有限公司 | A kind of data communication processing board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110287132A (en) * | 2019-05-17 | 2019-09-27 | 全球能源互联网研究院有限公司 | A kind of data communication processing board |
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