CN201225902Y - System for processing farmland data stream based on DSP ZigBee network - Google Patents
System for processing farmland data stream based on DSP ZigBee network Download PDFInfo
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- CN201225902Y CN201225902Y CNU2008200373878U CN200820037387U CN201225902Y CN 201225902 Y CN201225902 Y CN 201225902Y CN U2008200373878 U CNU2008200373878 U CN U2008200373878U CN 200820037387 U CN200820037387 U CN 200820037387U CN 201225902 Y CN201225902 Y CN 201225902Y
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Abstract
The utility model discloses a DSP-based ZigBee internet farmland data stream processing system, which mainly comprises a digital signal processor DSP, a programmable logic integration circuit CPLD, an analog/digital transformer AD, an electric-level transformation chip IC, an embedding-type microprocessor ARM9, wherein, ARM9 is connected with the digital signal processor DSP, and DSP is connected with the programmable logic integration circuit CPLD, and the CPLD is connected with the analog/digital transformer AD, and the AD is connected with the electric-level transformation chip IC. The processing system is mainly used for instantly monitoring the farmland information, and particularly for monitoring the image information.
Description
Technical field
The utility model relates to a kind of farmland data flow processing system, and especially a kind of field information acquisition and wireless transmission that is applied to the precision agriculture field realizes the system that agricultural land information is monitored in real time.
Background technology
At present, the precision agriculture aspect research of China is started in the mid-90.Taken the lead in carrying out the research of precision agriculture by China Agricultural University, and set up China first " precision agriculture research centre ", aspects such as GPS location test, grain yield sensor, soil moisture test and fruit image classification have been studied in 1998.Zhejiang University also is one of domestic unit that early carries out precision agriculture research, introduced high-precision agricultural DGPS Receiver Ag132 from external, flat digitizer, remote sensing process software, long-distance radio communication module etc., certain research has been carried out in mobile collection to agricultural land information, but still fails to realize the collection of image information in communication.
Chinese Academy of Sciences's Hefei intelligent machineization the former Song Liangtu with Chinese University of Science and Technology of Liu the hardware based on the Agricultural Information wireless transmission of Zigbee technology has been carried out correlative study, they propose to constitute wireless built transmission design of Intelligence Controller method with AvR Chip Microcomputer A tlnega8L and chip CC2420; And what returned proposition such as nanmu by Capital Normal University mainly is that the Zigbee radio micro controller JN5121-M02 module of producing with Jennic company is the design proposal of the wireless farmland acquisition control system of core.But only realized the fixed point acquisition function, do not carried out the mobile exploitation, can not realize that the fixed point of agricultural land information and mobile collection combine.
Is hardware core for propositions such as Li Xiu is red in the research of Agricultural Information issue with ARM CPU, scheduling and management by μ C/OS-II embedded OS, realize the real-time collection and the processing of agriculture field data, send it to database server via CDMA/GPRS wireless mobile communications module then.At server end, adopt the ASP.NET technology to realize dynamic WEB issue, the user can browse and download various Agricultural Information data at any time by the INTERNET network.But this scheme all has much room for improvement at aspects such as reliability, integration, stability and extendabilities, can not adapt to the various needs of agricultural environment information monitoring and management under the long-range condition fully.
In sum, present as can be seen China has the following disadvantages at the data flow processing system of field information acquisition and ZigBee wireless sensor network:
1. still be unrealized based on the real-time monitoring of the image of ZigBee network
At present based on the temperature of ZigBee network, the research of data monitorings such as humidity is domestic a relevant report, but does not see pertinent literature, achievement and patent report based on the real-time Study of Monitoring of the image of ZigBee network is domestic.
2.ZigBee the data flow processing system speed of wireless sensor network is slower
Apply to the domestic existing relevant report of research that the agricultural land information fixed point is gathered about the Zigbee network technology, but majority all is that employing single-chip microcomputer, arm processor are hardware core, about combined digital signal processor DSP exploitation, realize that the research of the fast, efficient, safe processing of data stream of ZigBee wireless sensor network is domestic and do not see pertinent literature, achievement and patent report.
3. the energy of wireless sensor network utilization factor is low
Because wireless sensor network do not rely on fixing infrastructure, when interstitial content is bigger, when network size was too big, it is particularly important that high efficiency routing algorithm seems.Now both at home and abroad popular a kind of solution adopts hierarchy that network is divided into several bunches exactly, the basic enterprising walking along the street of sub-clustering by.The LEACH algorithm is typical case's representative of wireless sensor network sub-clustering algorithm, and other all come therefrom as TEEN, APTEEN, PEGASIS scheduling algorithm.Since task that leader cluster node is born far more than bunch in member node, so must by bunch in the in turn elected leader cluster node of member too much do sth. in advance inefficacy to avoid leader cluster node because of energy consumption.Existing sub-clustering algorithm only relies on randomness to carry out the balance of energy load when bunch great wheel is changed, do not fully take into account the dump energy of alternative node, can cause that some node is too fast to be exhausted the energy content of battery and shorten lifetime of system, the way to elect of leader cluster node awaits improving.
Summary of the invention
The purpose of this utility model is the deficiency that exists at prior art and a kind of farmland data flow processing system based on the ZigBee wireless sensor network of digital signal processor DSP that can monitor in real time the agricultural land information in precision agriculture field is provided.
In order to solve above-mentioned technical matters, the utility model is achieved through the following technical solutions:
A kind of data flow processing system of the ZigBee network based on DSP, it is characterized in that, it is mainly by the digital signal processor digital signal processor DSP, programming logic integrated circuit CPLD, mould/number converter AD, level transferring chip IC, embedded microprocessor ARM9, CCD camera T1, pH value sensor T2, Temperature Humidity Sensor T3, GPS sensor T4, ZigBee wireless sensor module T5 forms, the signal output of CCD camera T1 links to each other with the input of embedded microprocessor ARM9 by a USB expansion mouthful KZ, the output of pH value sensor T2 connects the input of mould/number converter AD, the DOL Data Output Line D of AD links to each other with the Data In-Line D1 of level transferring chip IC, the DOL Data Output Line D2 of level transferring chip IC links to each other with the Data In-Line D of digital signal processor digital signal processor DSP, digital signal processor DSP read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A respectively with programming logic integrated circuit CPLD read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A links to each other, the clock signal terminal CLK of digital signal processor digital signal processor DSP all links to each other with crystal oscillator XL with the clock signal terminal CLK of programming logic integrated circuit CPLD, the data read of programming logic integrated circuit CPLD/startup switching signal end RC, chip selection signal end CS respectively and the data read of mould/number converter AD/startup switching signal end R/C, chip selection signal end CS links to each other, the signal gating of programming logic integrated circuit CPLD links to each other with end of convert OE with the signal gating of level transferring chip IC with end of convert OE, Temperature Humidity Sensor T3, the signal output of GPS sensor T4 links to each other with the serial input port UART of digital signal processor DSP, the data address bus PCI of digital signal processor DSP links to each other with the data address bus PCI of embedded microprocessor ARM9, and the signal output of embedded microprocessor ARM9 links to each other with each ZigBee wireless sensor module T5 by a USB expansion mouthful KZ.
The beneficial effects of the utility model:
1. realized real-time monitoring, made things convenient for the agricultural user management, provide decision support to relevant departments simultaneously based on the farmland image information of ZigBee network.
2. utilize digital signal processor DSP (TMS320VC5502) to handle the data stream of ZigBee wireless sensor network fast, efficient, safely.
3. effective utilization of energy of wireless sensor network.Can know by consulting the chip handbook, the power voltage supply ability of 2.0V-3.6V that ZigBee chip CC2431 needs is not more than 0.6 μ A, the 1.26V core voltage power supply capacity that TMS320VC5502 needs is 250mA, 3.3V I/O voltage and the power supply capacity of phaselocked loop I/O voltage be 50mA, the power consumption of digital signal processor DSP chip is 480mW.The power consumption representative value of ADS7805 chip is 100mW, and 6 amount to 600mW.The representative value of the 3.3V electrical source consumption electric current of CPLD is 100mA, i.e. 330mW.Like this, the total system power consumption probably is 1.5W.Make under the battery-powered situation, this power consumption size also is an acceptable.For example, use the accumulator of a 12V output, 50Ah, ideally can power 400 hours system.Even consider the energy loss in the voltage transitions process, with the accumulator of above-mentioned specification to system power 40 hours also be feasible.
Description of drawings
Fig. 1 is an electric principle schematic of the present utility model
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As Fig. 1, the data flow processing system of the ZigBee wireless sensor network based on digital signal processor DSP of the present utility model, it is mainly by digital signal processor DSP (model can be TMS320VC5502), programming logic integrated circuit CPLD (model can be XC95144XL), mould/number converter AD (model can be ADS7805), level transferring chip IC (model can be 74ALVC164245), embedded microprocessor ARM9 (model can be S3C24103), CCD camera T1 (can adopt the MVC1000 of Weishixinjiyuan Science ﹠ Technology Co., Ltd., Beijing), pH value sensor T2 (can adopt the GA 151 of German Meinsberg company), Temperature Humidity Sensor T3 (can adopt the JY2TDR-3A of the long-range Science and Technology Ltd. in Chinese and Western, Beijing), GPS sensor T4 (can adopt the PM-1211-A1 of Yongxuan International Co., Ltd.), ZigBee wireless sensor module T5 (model can be the CC2431 of 2.4GHz standard) forms, the signal output of CCD camera T1 links to each other with the input of embedded microprocessor ARM9 by a USB expansion mouthful KZ, the output of pH value sensor T2 connects the input of mould/number converter AD, the DOL Data Output Line D of AD links to each other with the Data In-Line D1 of level transferring chip IC, the DOL Data Output Line D2 of level transferring chip IC links to each other with the Data In-Line D of digital signal processor DSP, digital signal processor DSP read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A respectively with programming logic integrated circuit CPLD read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A links to each other, the clock signal terminal CLK of digital signal processor DSP all links to each other with crystal oscillator XL with the clock signal terminal CLK of programming logic integrated circuit CPLD, the data read of programming logic integrated circuit CPLD/startup switching signal end RC, chip selection signal end CS respectively and the data read of mould/number converter AD/startup switching signal end R/C, chip selection signal end CS links to each other, the signal gating of programming logic integrated circuit CPLD links to each other with end of convert OE with the signal gating of level transferring chip IC with end of convert OE, Temperature Humidity Sensor T3, the signal output of GPS sensor T4 links to each other with the serial input port UART of digital signal processor DSP, the data address bus PCI of digital signal processor DSP links to each other with the data address bus PCI of embedded microprocessor embedded microprocessor ARM9, and the signal output of embedded microprocessor ARM9 links to each other with each ZigBee wireless sensor module T5 by a USB expansion mouthful KZ.
Groundwork process of the present utility model is: adopt GPS sensor T4, Temperature Humidity Sensor T3, pH value sensor T2 and CCD camera T1 earlier, gather geography information, crop environmental information and the image information in farmland, after handling through digital signal processor DSP then, by the ZigBee wireless sensor network data wireless is transferred to host computer or portable terminal, is used for research, inquiry, issue etc.
In the hardware interface circuit design of the present utility model, digital signal processor DSP is finished the core work of filtering operation, and the control core of total system is programming logic integrated circuit CPLD, and embedded microprocessor ARM9 realizes the expansion of USB interface in addition.Digital signal processor DSP is to produce control signal by programming logic integrated circuit CPLD to the operation of 6 road A/D converter AD sample circuits, controlling the sampling trigger signal of 6 AD, the multiplexing and demultiplexing of 6 A/D converter AD, and 5V changes the gating of 3.3V voltage transitions chip IC etc.The active crystal oscillator XL of 30MHz is adopted in the clock input of programming logic integrated circuit CPLD and digital signal processor DSP.Digital signal processor DSP utilizes chip selection signal CE2, address signal A, read enable signal ARE, write enable signal AWE sends instruction to programming logic integrated circuit CPLD, CPLD sends control signal according to the instruction of digital signal processor DSP to 6 A/D converter AD, and startup AD chip is sampled and control figure signal processor DSP finishes reading data.Because the data of A/D converter AD output will be passed through level transferring chip IC, programming logic integrated circuit CPLD also needs gating and the conversion of control level conversion chip IC.Therefore, digital signal processor DSP must comprise the CE2 chip selection signal to the control signal that programming logic integrated circuit CPLD provides, ARE reads enable signal and AWE writes enable signal, when digital signal processor DSP reads A/D converter AD translation data, enable level conversion chip IC carries out level conversion, when A/D converter AD carries out the A/D conversion to simulating signal, can not use level conversion core IC, in order to avoid the data bus conflict that causes multichannel data to cause.Because 6 A/D converter AD are arranged, distinguish this 6 A/D converter AD so need to distribute 3 address wire signals (generally electing minimum 3 bit address wire pins as) at least, but in fact 3 address wire signals can be used for representing 8 addresses, remaining 2 addresses also can use, for example, carrying out read operation to one in remaining 2 addresses can be considered as digital signal processor DSP and give an order, in order to start A/D converter AD, so just can save the connection of AWE signal between digital signal processor DSP and the programming logic integrated circuit CPLD.So need offering the signal of A/D converter AD, programming logic integrated circuit CPLD comprises chip selection signal CS and data read/startup switching signal RC, in addition, programming logic integrated circuit CPLD also will provide the gating signal OE of level transferring chip, and need to insert a clock signal clk, be used for providing the synchronizing clock signals of sequential logic to programming logic integrated circuit CPLD.
The utility model is realized the wireless transmission to image information, and key issue is transmission speed.System adopts the ZigBee module CC2431 of 2.4GHz standard, its transmission speed is 250kbs, and the bit rate of serial ports is 20K to the maximum, if use the serial ports transmission, greatly limited the image transmitting speed, therefore native system uses embedded microprocessor ARM9 to expand USB interface, PCI communicates by letter between digital signal processor DSP and the embedded microprocessor ARM9, and pci bus is a parallel bus, can reach 64M X 64bit=4096Mbps, the hump speed of usb is 12Mbps, and the transmission speed of the two all is far longer than the peak transfer rate of ZigBee wireless network.So just can not limit the speed of radio transmitting image.
It is as follows that information flow of the present utility model is handled detailed process:
1. image information
CCD camera T1 collects image information, USB1 by USB expansion mouthful KZ passes on the embedded microprocessor ARM9 core board, pass on the digital signal processor DSP by address data bus PCI then, behind digital signal processor DSP compression, coding, be transferred to again on the embedded microprocessor ARM9 core board, embedded microprocessor ARM9 is transferred on the ZigBee wireless sensor module T5 by the USB0 of USB expansion mouthful KZ, by T5 image information is sent to host computer.
2. simulating signal such as P in soil H value
The curtage signal of pH value sensor T2 output, through after mould/number converter AD carries out analog to digital conversion, by be transferred to by 16 position datawire D carry out filtering, compression, coding on the digital signal processor DSP after, be transferred to again on the embedded microprocessor ARM9 core board, embedded microprocessor ARM9 is transferred on the ZigBee wireless sensor module T5 by USB0, by T5 image information is sent to host computer.In addition can also standby respectively five pH value sensor T6, the output of T7, T8, T9, T10 connects the input of mould/number converter AD.
3.GPS locating information and humiture information
GPS sensor T4 and Temperature Humidity Sensor T3 collect relevant information, by serial ports UART be transferred to carry out filtering, compression, coding on the digital signal processor DSP after, be transferred to again on the embedded microprocessor ARM9 core board, embedded microprocessor ARM9 is transferred on the ZigBee wireless sensor module T5 by USB0, by T5 image information is sent to host computer.
Claims (1)
1. farmland data flow processing system based on the ZigBee network of DSP, it is characterized in that, it is mainly by digital signal processor DSP, programming logic integrated circuit CPLD, mould/number converter AD, level transferring chip IC, embedded microprocessor ARM9, CCD camera T1, pH value sensor T2, Temperature Humidity Sensor T3, GPS sensor T4, ZigBee wireless sensor module T5 forms, the signal output of CCD camera T1 links to each other with the input of embedded microprocessor ARM9 by a USB expansion mouthful KZ, the output of pH value sensor T2 connects the input of mould/number converter AD, the DOL Data Output Line D of AD links to each other with the Data In-Line D1 of level transferring chip IC, the DOL Data Output Line D2 of level transferring chip IC links to each other with the Data In-Line D of digital signal processor DSP, digital signal processor DSP read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A respectively with programming logic integrated circuit CPLD read enable signal end ARE, chip selection signal end CE2, write enable signal end AWE, address wire A links to each other, the clock signal terminal CLK of digital signal processor DSP all links to each other with crystal oscillator XL with the clock signal terminal CLK that patrols integrated circuit CPLD able to programme, the data read of programming logic integrated circuit CPLD/startup switching signal end RC, chip selection signal end CS respectively and the data read of mould/number converter AD/startup switching signal end R/C, chip selection signal end CS links to each other, the signal gating of programming logic integrated circuit CPLD links to each other with end of convert OE with the signal gating of level transferring chip IC with end of convert OE, Temperature Humidity Sensor T3, the signal output of GPS sensor T4 links to each other with the serial input port UART of digital signal processor DSP, the data address bus PCI of digital signal processor DSP links to each other with the data address bus PCI of embedded microprocessor ARM9, and the signal output of ARM9 links to each other with each ZigBee wireless sensor module T5 by a USB expansion mouthful KZ.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200373878U CN201225902Y (en) | 2008-06-20 | 2008-06-20 | System for processing farmland data stream based on DSP ZigBee network |
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| CNU2008200373878U CN201225902Y (en) | 2008-06-20 | 2008-06-20 | System for processing farmland data stream based on DSP ZigBee network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944281A (en) * | 2010-07-15 | 2011-01-12 | 嘉兴学院 | Wireless sensor network monitoring system of crop seed pregermination environment |
| CN104251718A (en) * | 2014-09-29 | 2014-12-31 | 中国农业科学院农业环境与可持续发展研究所 | Universal network ecological environment factor collection system |
-
2008
- 2008-06-20 CN CNU2008200373878U patent/CN201225902Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944281A (en) * | 2010-07-15 | 2011-01-12 | 嘉兴学院 | Wireless sensor network monitoring system of crop seed pregermination environment |
| CN104251718A (en) * | 2014-09-29 | 2014-12-31 | 中国农业科学院农业环境与可持续发展研究所 | Universal network ecological environment factor collection system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080620 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |