CN102147612A - Wireless sensor network data acquisition system based on 32-bit micro-processor - Google Patents
Wireless sensor network data acquisition system based on 32-bit micro-processor Download PDFInfo
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Abstract
The invention discloses a wireless sensor network data acquisition system based on a 32-bit micro-processor and belongs to the technical field of data acquisition. The invention provides the wireless sensor network data acquisition system based on the 32-bit micro-processor, which consists of an upper computer and a wireless sensor network system, wherein the wireless sensor network system comprises a coordination node, a routing node and a sensor node; and a node processor module adopts the 32-bit micro-processor. The system has the advantages that: a processing speed and efficiency are improved greatly; the system can be applied to places with a higher requirement on an operation quantity; a complete operating system can be configured; and real multi-task scheduling is realized by configuring a multi-level priority for multi-task and multi-interruption in the real-time operating system, and collision and data loss of an 8-bit micro-processor and a 16-bit micro-processor which occur in the multi-interruption are avoided.
Description
Technical field
The invention belongs to the data acquisition technology field, relate to a kind of wireless data acquisition system based on 32-bit microprocessor.
Background technology
Data acquisition technology is widely used in fields such as military affairs, industry, medical treatment, environment measurings.Data acquisition is exactly the various parameters by various sensor acquisition measurands, the process of being handled or being stored by controller.Present widely used data acquisition system (DAS) generally is will collect data transmission to controller by cable network, but collection for some extreme natural environment data, can't be furnished with spider lines, the wireless sensor network that therefore has characteristics such as cost is low, low in energy consumption, dirigibility is good becomes the optimal selection of data acquisition system (DAS).Wireless sensor network is disposed sensor nodes such as a large amount of sound, temperature, vibrations, pressure in the monitored area, form ad hoc network system by wireless communication mechanism, can real-time perception and the various effective informations of collecting in the monitored area.
Existing wireless data acquisition system mainly is divided into based on the acquisition system of wireless sensor network with based on two kinds of the acquisition systems of GPRS/GSM network.As utility model patent " working-yard, oil field wireless data acquisition system " (application number: 200920297318.5), this wireless data acquisition system comprises sensor network server, and the various sensors that are communicated with sensor network server respectively by wireless network, transmitter, flowmeter interface termination, data monitoring main frame etc.As practicality novel " based on the wireless data acquisition system of MSP430 single-chip microcomputer " (application number: 200920245375.9), adopt MSP430F147 single-chip microcomputer+Zigbee communication module composition data acquisition system, this system is made of host computer, wireless communication module and data acquisition system (DAS), is connected with one or more data acquisition system (DAS)s on the wireless communication module.As practicality novel " numerical control group of planes GPRS wireless data transmission and supervisory system " (application number: 201020163672.1), main control terminal and controlled terminal all possess the GPRS module of autonomous dialing, main control terminal and controlled terminal rely on on-the-spot Modbus or the networking of Profibus bus, and are connected with the mobile communication cell base station by the GPRS module.Main control terminal is connected with controlled terminal by the mobile communication cell base station.
Foregoing invention is created and has been solved certain technical matters, but the following deficiency of ubiquity: 1. at present based on the wireless acquisition system of the sensor network technique kernel processor chips that adopt 8 or 16 more, ability and the limited speed handled can't solve that present field data amount is big, the demanding technical matters of real-time; 2. node is placed on two chips respectively with data processing function and radio-frequency receiving-transmitting function in the existing sensor network, and volume is bigger; 3. based on the wireless acquisition system of GPRS/GSM class, must use GPRS/GSM module cost height, volume is big, energy consumption is big, node itself must adopt active electricity to power, operative scenario is limited.
Summary of the invention:
Can't satisfy for solving existing wireless acquisition system that present field data amount is big, real-time is high, the flexible working mode various requirement, the invention provides a kind of wireless sensor network data acquisition system based on 32-bit microprocessor, form by host computer and wireless sensor network system, wireless sensor network system comprises coordinator node, routing node and sensor node, and processor module adopts 32-bit microprocessor in the node.
The network topology structure of the wireless data acquisition system that the present invention is designed is a tree network.There is three types node in the network: coordinator node, routing node and sensor node.Three types node all has processor module, power module, wireless radio frequency modules, induction module, AD/DA module and JTAG debugging module and forms; Coordinator node and routing node also comprise external E except that above-mentioned total module
2PROM and UART interface.Three kinds of node roles in network are: coordinator node serves as tree root node role, and sensor node serves as and is the leaf nodes role, and routing node serves as the transit node role.Because three kinds of nodes all have induction module, the flexible change that its role can be suitable, as: coordinator node and routing node can serve as sensor node according to the variation of application scenarios.
Be with general ZigBee network difference, related three kinds of nodes all have the sensing capability to environment among the design, changed traditional Z igBee network only in the terminal tip part (promptly have only sensor node to have sensing capability) of network to the working method that environment is responded to, enlarged the scope of induction.
Joint core functions of modules and principle explanation:
The wireless sensor network data acquisition system that the present invention is designed, the kernel processor chip of all nodes is the JN5148 family chip of Jennic company, and node processing module and radio-frequency module have been integrated in material object on the chip module, and node volume integral body is dwindled.Wherein, the modal processor module comprises 32-bit microprocessor and built-in ROM, 32-bit microprocessor is responsible for the computing and the processing of information, in one-period, carry out product/and computing with the frequency of operation of 32MHz, satisfy the application that fast fourier transform or acoustic processing etc. have higher requirements to operand, burned in advance Zigbee agreement among the built-in ROM, agreement memory-resident, outage is not lost, and application program can be according to the requirement of programming invocation protocol; Wireless radio frequency modules is used the international free frequency range of 2.4G, meet the IEEE802.15.4 standard, emissive power+2.5dBm is to+20dBm, and receiver sensitivity reaches-95dBm, can adjust transmitted power flexibly to the requirement of communication distance according to using, message transmission rate is up to 667kbp/s.
The function of other modules of node and principle explanation:
The AD/DA module of node can be finished 12 analog to digital conversion to 4 road signals, can be digital signal with the analog signal conversion of sensor, switch, detent etc.The input clock frequency of this module is 16MHz, and frequency division is 2MHz, 1MHz, 500KHz and 250kHz as required.AD/DA module involved in the present invention is the built-in AD/DA of 32-bit microprocessor JN5148.
Two chips of preferred AS1117-5.0 of power module and AS12117-3.3 are finished the conversion to the varying level size, realize the power supply of different electrical power to other modules and parts.By power module, guarantee that node both can adopt powered battery, also can adopt wired ac mode to power.The required power supply of each parts on the node also carries out corresponding level conversion by power module.The power module flexible design makes node when abominable or bad environment work, the mode that can adopt powered battery, dispenses at random, and, reduce power consumption by improving the working time dutycycle of processor and wireless radio frequency modules; Under the situation that condition of work allows, as laboratory debugging, mobile unit occasion etc., can use the active electrical source power supply nearby, improve the processor work efficiency.
Induction module is in order to the information around the induced environment, and this module preset temperature, humidity sensor are in order to gather the temperature and humidity information in the environment; This module is reserved slot, and the access with the analog sensor information of the digital transducer information of supporting maximum 8 passages and maximum 4 passages realizes the expansion of inducing function.The electric requirement of the work of digital sensor is 0 general ~ 3.3V; The electric requirement of the work of analog sensor is 0 general ~ 3.3V, and analog sensor information needs the conversion through the analog to digital of AD/DA module after this module inserts.
JTAG debug function involved in the present invention utilizes the built-in debugging module of 32-bit microprocessor JN5148 to finish.The JTAG debugging module is responsible for the debugging and the loading of application programs, utilizes bottom hardware facility of the present invention and open JTAG debugging module, can realize the modification of loading application programs and reloads the application program that meets user's request.
The peculiar functions of modules of coordinator node and routing node and principle explanation:
When built-in ROM off-capacity, external E
2PROM is the slack storage space of node.Among the present invention, among the built-in ROM of chip JN5148, burned in advance Zigbee agreement, system data, outage is not lost; User's data and user program are written into external E
2PROM, the E of the preferred Jennic of the present invention 24AA01 of company series
2PROM.What be necessary to illustrate is that sensor node need not to dispose external E among the present invention
2PROM, the data in the collection are stored among the built-in ROM temporarily.
Coordinator node links to each other with host computer by the UART interface with routing node, gives the supvr with data upload, and the preferred MAX3232 chip of the present invention is realized real RS-232 serial port function when 3.0V～5.5V power supply is powered.
Coordinator node is connected to touch-screen, utilize the touch screen query network node data, Control Node work, the control chip of touch-screen is done by 32-bit microprocessor is double, be the receiving and sending messages of coordinator node, process information and screen displaying control information, above-mentioned functions is coordinated to finish by 32-bit microprocessor involved in the present invention.The system clock frequency of 8 traditional (or 16) microprocessors is for usually less than 12M, such sensor node is if need to be equipped with touch screen function, for the screen phenomenon of sweeping of avoiding touch-screen occurs, be generally touch-screen and dispose independently microprocessor, promptly use 2 microprocessors, collection, processing, reception and a transmission that is used for information, another is used for controlling touch-screen.Owing to adopt 32-bit microprocessor among the present invention, have system clock frequency up to 32M, can adopt a microprocessor to finish to information processing and screen display function.
System software function and explanation involved in the present invention:
Node involved in the present invention owing to adopt 32-bit microprocessor, therefore can dispose the operating system of independent completion wherein, by in real time operating system multilevel precedence being disposed in multitask and multiple interrupt, realizes real multi-task scheduling, the efficient processing.Traditional 8 and the microprocessor of 16 bit are because the restriction of processing power, usually complete operating system can't be installed, take single-threaded queueing form's processed in sequence task mostly, for example: an interruption occurs and be untreated, the phenomenon that has new interruption to arrive again conflict can occur and cause loss of data.And the 32-bit microprocessor of employing configuration operation system can compare interrupt level to this situation, keeps the inferior grade interrupt event, and the priority processing high-level events after pending the finishing, is handled the inferior grade incident that keeps again.
The system software of coordinator node and routing node comprises that modules such as data presentation, database, data statistics and analysis, system are provided with can expand use for the user.Data disaply moudle be responsible for the data in real time of sensor node collection be presented on the computer interface, database is used for store historical data.Data acquisition statistics and analysis module function have packet loss, Bit Error Ratio Measurement, network topology and network size control, and network recovers automatically, reports to the police etc., and system is provided with the responsible setting to man-machine interface, system operation etc. of module.
The present invention has following advantage: 1. the present invention is integrated in data processing function and radio-frequency receiving-transmitting function on the chip, the processor adopting 32-bit microprocessor, and processing speed and efficient greatly improve, and can realize the application scenarios that operand has higher requirements; 2.32 among the built-in ROM of bit microprocessor, burned in advance Zigbee agreement, the user need not to repeat to write the Zigbee agreement; 3. the present invention adopts the 32-bit microprocessor chip, can be wherein with complete operating system configuration, by in real time operating system, multilevel precedence being disposed in multitask and multiple interrupt, realize real multi-task scheduling, conflict and loss of data phenomenon when avoiding 8 and the microprocessor of 16 bit when multiple interrupt, to occur.4. utilize bottom hardware facility of the present invention and open JTAG debugging module, can realize the modification of loading application programs and reload the application program that meets user's request; 5. all nodes among the present invention are all supported the acquisition function of data, can reduce sensor node quantity, reduce the construction cost of data acquisition system (DAS).
Description of drawings
Fig. 1 is a kind of wireless sensor network data acquisition system example block diagram based on 32-bit microprocessor of the present invention
O: host computer; A: coordinator node; B, C, G, H: routing node; D～F, I～N: sensor node
Fig. 2 is the composition frame diagram of a kind of radio node based on 32-bit microprocessor of the present invention
Fig. 3 is the workflow diagram of a kind of wireless sensor network data acquisition system based on 32-bit microprocessor of the present invention.
Embodiment
According to the variation of applied environment, the present invention can adjust the quantity of routing node and sensor node flexibly.With 1 coordinator node, the wireless sensor network data acquisition system of 5 routing nodes and 9 sensor node compositions is an example, and technical solution of the present invention is further specified below.Comprise 1 PC in the example shown in Figure 1 as host computer, 1 coordinator node, 5 routing nodes and 9 sensor nodes.The network depth capacity is that 3(is that maximum multi-hop number of times is 3), the maximum child node number of each father node is 5, maximum routing node number is 3.According to the distributed network address distribution of Zigbee, the network address of each node is respectively among the figure:
A:0x0000 B:0x0001 C:0x0016 D:0x0008 E:0x001D F:0x0023
G:0x0002 H:0x0017 I:0x003 J?:0x0004 K:0x0005 L:0x0018
M:0x0019 N:0x001A
If there is new node will add network, need by the coordinator node in the network or routing node as father node.After success adds network, node will obtain 16 network short address automatically.Successively to transmitting data, until coordinator node, for example to upload the path of data be J-G-B-A to node J to sensor node by its father node.
Figure 2 shows that node hardware composition frame diagram of the present invention.Node is by processor module, power module, radio-frequency module, AD/DA module, E
2PROM, UART interface, JTAG debugging interface are formed.Processor module is the core of whole node, controls other modules by processor.It is 32 RISC CPU that the present invention adopts processor module, and 4 ~ 32M dominant frequency is adjustable, supports various protocols stacks such as IEEE802.15.4, ZigBeePRO, and supports sleep mechanism, has characteristics such as low in energy consumption, high capacity storage.Adopt common dry cell that node is powered, the operating voltage that satisfies each module is provided by voltage stabilizer.The AD/DA module can be a digital signal with the analog signal conversion of sensor, switch, detent, power supply etc.Realize communicating by letter of coordinator node and PC by the RS232 serial ports.Use the JTAG emulator to be used for system is carried out artificial debugging and chip testing.FLASH is used to store application program of user, can be erasable repeatedly.
Figure 3 shows that network operation process flow diagram.Coordinator node is responsible for starting whole network, and coordinator node is provided with network radio frequency channel and network ID before starting.The Zigbee operating frequency range is 2400Mhz to 2483.5Mhz, and it is available to amount to 16 channels.Detect channel New-deployed Network in the best state of selection by energy scan.After the coordinator node protocol stack successfully starts, wait for the request that other nodes add network that receives.Carry out listen for beacons according to the channel search scope that is provided with behind routing node or the sensor node electrifying startup, after web search is finished, submit the application of adding network automatically.Because father node addresses distributed space is limited, when the group number of nodes is no more than the value of setting, no longer allow routing node or terminal node to add network.The data of sensor acquisition will be embedded among the APDU (Application Protocol Data Unit), upload to coordinator node with binding mode by wireless network.
The explanation of task scheduling mode: various tasks and interruption are provided with integer-valued priority.1 is lowest priority, increases progressively successively until all tasks (interruption) and finishes the priority setting, and numerical value high priority more is high more.In the cpu resource competitive stage, the task that the task that priority is high is low prior to priority is performed, and the priority of all breaks in service all is higher than task priority.
Host computer provides functions such as visual interface, data query, data statistics.Visual interface can be imported picture format video datas such as .JPG .BMP and gather environment.Can show orientation, node place, whole network topology structure and the node communication situation of disposing, dispose the node location icon and can move flexibly according to the actual deployment situation.When sensor node data surpassed threshold value, host computer provided the Threshold Alerts function, and node icon will present the state of flashing.The historical data that the database storing sensor node is uploaded provides the inquiry of historical data.Host computer can be added up alarm times, image data maximal value, minimum value, mean value etc.
Wireless data acquisition system of the present invention is not confined to embodiment, also can make some simple derivations or replacement according to actual conditions, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. plant wireless sensor network data acquisition system based on 32-bit microprocessor, form by host computer and wireless sensor network system, wireless sensor network system comprises coordinator node, routing node and sensor node, it is characterized in that processor module adopts 32-bit microprocessor in the node.
2. according to the described system of claim 1, it is characterized in that, described coordinator node, routing node and sensor node are formed by processor module, power module, wireless radio frequency modules, induction module, AD/DA module and JTAG debugging module, and coordinator node and routing node also comprise external E
2PROM and UART interface; Processor module and radio-frequency module are integrated on the chip module.
3. according to the described system of claim 2, it is characterized in that coordinator node, routing node and sensor node all comprise induction module, the induction module spare interface can be expanded the access sensor.
4. according to the described system of claim 2, it is characterized in that processor module comprises 32 process chip and built-in ROM, burned in advance Zigbee agreement among the built-in ROM.
5. according to the described system of claim 2, it is characterized in that power module is finished the conversion of level character and size, support to realize exchange, direct current 2 class power supplys are to the power supply of other modules and parts.
6. according to the described system of claim 2, it is characterized in that wireless radio frequency modules is responsible for the transmission of institute's Information Monitoring in wireless sensor network, the Physical layer of module bottom and media access control layer meet the IEEE802.15.4 standard.
7. according to the described system of claim 2, it is characterized in that the JTAG debugging module is responsible for the debugging and the loading of application programs, realize the modification of loading application programs and reload the application program that meets user's request.
8. according to the described system of claim 2, it is characterized in that coordinator node is connected to touch-screen, utilize the touch screen query network node data, Control Node work, the control chip of touch-screen is done by 32-bit microprocessor is double.
9. according to the described system of claim 2, it is characterized in that described system comprises 1 PC as host computer, 1 coordinator node, 5 routing nodes and 9 sensor nodes.
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| CN102393716A (en) * | 2011-11-07 | 2012-03-28 | 苏州科技学院 | Energy-saving building monitoring system based on wireless sensing network |
| CN103118393A (en) * | 2013-03-18 | 2013-05-22 | 山东大学 | Data acquisition based wireless ad hoc network simulation platform and simulation method |
| CN103471744A (en) * | 2013-09-25 | 2013-12-25 | 无锡商业职业技术学院 | Wireless heat energy metering and monitoring system |
| CN104270452A (en) * | 2014-10-11 | 2015-01-07 | 南京航空航天大学 | Remote medical data management system and wireless network communication method thereof |
| CN106448110A (en) * | 2016-10-26 | 2017-02-22 | 南方电网科学研究院有限责任公司 | Beidou satellite-based automatic-measurement data acquisition system and method |
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| CN111537791A (en) * | 2020-07-01 | 2020-08-14 | 杭州雷甸科技有限公司 | Intelligent electric meter based on embedded operating system |
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| CN102393716A (en) * | 2011-11-07 | 2012-03-28 | 苏州科技学院 | Energy-saving building monitoring system based on wireless sensing network |
| CN102393719A (en) * | 2011-11-10 | 2012-03-28 | 江南大学 | Double-closed-loop system and method for monitoring museum environment based on internet of things |
| CN103118393A (en) * | 2013-03-18 | 2013-05-22 | 山东大学 | Data acquisition based wireless ad hoc network simulation platform and simulation method |
| CN103471744A (en) * | 2013-09-25 | 2013-12-25 | 无锡商业职业技术学院 | Wireless heat energy metering and monitoring system |
| CN104270452A (en) * | 2014-10-11 | 2015-01-07 | 南京航空航天大学 | Remote medical data management system and wireless network communication method thereof |
| CN104270452B (en) * | 2014-10-11 | 2018-03-30 | 南京航空航天大学 | A kind of tele-medicine data management system and its wireless network communication method |
| CN106448110A (en) * | 2016-10-26 | 2017-02-22 | 南方电网科学研究院有限责任公司 | Beidou satellite-based automatic-measurement data acquisition system and method |
| CN106572183A (en) * | 2016-11-10 | 2017-04-19 | 王亚慧 | Intelligent wireless network sensor system possessing power supply management |
| CN109143084A (en) * | 2018-11-07 | 2019-01-04 | 沈阳工程学院 | A kind of storage batteries of transformer substation group state collecting device based on WLAN technology |
| CN111537791A (en) * | 2020-07-01 | 2020-08-14 | 杭州雷甸科技有限公司 | Intelligent electric meter based on embedded operating system |
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Application publication date: 20110810 |