CN102592423A - Multi-sensor perception node in complicated environmental condition - Google Patents
Multi-sensor perception node in complicated environmental condition Download PDFInfo
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- CN102592423A CN102592423A CN2012100437103A CN201210043710A CN102592423A CN 102592423 A CN102592423 A CN 102592423A CN 2012100437103 A CN2012100437103 A CN 2012100437103A CN 201210043710 A CN201210043710 A CN 201210043710A CN 102592423 A CN102592423 A CN 102592423A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a multi-sensor perception node in complicated environmental condition, belonging to the technical field of a wireless sensor network. The node mainly comprises a microprocessor module, a sensor module, a MicroSDCard memory, an RTC (real time clock) module, a power circuit module and a Zigbee wireless transceiving module. The multi-sensor perception node disclosed by the invention has the advantages that multiple sensor chips acquire multiple data parameters in current environment, and finally the Zigbee wireless transceiving module transfers the data to a monitoring center so that monitoring personnel can get a relatively comprehensive recognition on the environment in a data acquisition area to guarantee the safety of the monitored area and the handling of emergency; comprehensive communication coverage is realized through wireless data transmission; and the multi-sensor perception node has the characteristics of low cost, small volume, low power consumption and the like, provides comprehensive data acquisition capability, can realize long-term use in a complicated environment, and has broad market prospect.
Description
Technical field
The present invention relates to the wireless sensor network technology field, multisensor sensing node under particularly a kind of complicated environmental condition.
Background technology
In the area of some operating environment more complicated (like the mine; The down-hole; Tunnels etc.), wireline communication network can't reach some zones, the disaster information that wired monitoring point can't comprehensive monitoring critical area; The appearance of wireless sensor node has solved the problem that there be " blind area " in wireline communication network effectively, has realized the comprehensive communication covering to the critical area of workplace.Wireless sensor network is emerging research field, and huge potential application foreground is arranged, and the design of wireless sensor node and management provide new method for the data acquisition under the complex environment.
Zigbee is based on a low-power consumption territory fidonetFido of IEEE802.15.4 standard, is mainly used in closely, the double-direction radio communication of low-power consumption, and it can be operated on the efficient of 2.4GHz, and transmission range is in the 10-75m scope.Zigbee technology adopts the mode of self-organization network and on every side node to communicate, and through electric wave data is passed to another sensor from a sensor with the mode of relay.The Zigbee agreement has taken into full account the wireless sensor network demands of applications, has the equipment power saving, reliable communications, and self-organization of network, characteristics such as cost is low, and capacity is big are particularly suitable for the low-power consumption occasion.
Traditional wireless sensor network node function singleness; The data of gathering are limited; Can not realize the multidata collection of integrated environment; Can't comprehensively obtain the information of institute's monitoring of environmental, be unfavorable for guaranteeing the security of perform region, and have problems such as processing speed is slow, power consumption is high, antijamming capability is low, cost costliness.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The present invention provides multisensor sensing node under a kind of complicated environmental condition; Solve the information problem that present wireless sensor network node function singleness, data monitoring are not comprehensive, can't obtain institute's monitoring of environmental comprehensively, can realize the collection of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment, transmit data through wireless self-networking; It not only can be used in general place, and
Can be used in the place of specific (special) requirements such as mine, down-hole, tunnel.
The present invention realizes with following technical scheme: multisensor sensing node under a kind of complicated environmental condition; Comprise microprocessor module; The sensor assembly that is connected with microprocessor module respectively, Micro SD Card storer, RTC clock module, power circuit module and Zigbee radio receiving transmitting module; Each module is controlled and is called in the microprocessor module unification; Realize the collection of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment, and the processing of data in real time and transmission, and through wireless mode transmission data.
The beneficial effect of type of the present invention is: utilize the multiple sensors chip; Gather the several data parameter under the current environment; Through the Zigbee radio receiving transmitting module the most at last data be sent to Surveillance center; Make the monitor staff can have a ratio more comprehensively to be familiar with, help guaranteeing the security of monitored area and the processing of emergency case, guarantee the security of monitored area the environment of data pickup area; Utilize wirelessly transmitting data, realize that comprehensively communication covers, have characteristics such as cost is low, volume is little, low in energy consumption, can satisfy the long-term use under the complex environment, have vast market prospect.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Fig. 1 is a hardware block diagram of the present invention;
Fig. 2 is the entire system Organization Chart of work of the present invention;
Fig. 3 is hardware annexation figure of the present invention;
Fig. 4 is working mode change figure of the present invention;
Fig. 5 is an interrupt request hardware connection layout of the present invention.
Embodiment
As shown in Figure 1, the multisensor sensing node is made up of microprocessor, sensor assembly, Micro SD Card storer, RTC clock module, power circuit module and Zigbee radio receiving transmitting module under a kind of complicated environmental condition.The microprocessor unification is to the sheet choosing and the read-write control of each module; Realize the collection of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment; And the processing of data in real time and transmission; And, guarantee the security of guarded region through wireless mode transmission data.Node adopts the Routing Protocol of balancing energy, constitutes network with the wireless Ad Hoc form, and data are sent to aggregation node through the trunking scheme of multi-hop.
Sensor assembly comprises temperature sensor, humidity sensor, carbonomonoxide concentration sensor, oxygen concentration sensor, sensing methane concentration device and barometric pressure sensor, can realize the collection and the transmission of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment.
The present invention has collection, handles the function of compression and wireless receiving and dispatching data.Microprocessor links to each other with micro SD card memory chip through the SPI interface; Microprocessor obtains external clock information through the I2C interface from the RTC clock chip, the waking up of Control Node mode of operation; Microprocessor links to each other with humidity sensor, temperature sensor, carbonomonoxide concentration sensor, oxygen concentration sensor, sensing methane concentration device, barometric pressure sensor through the I/O interface; Each sensor is given microprocessor with the data that collect through different I/O mouths, and microprocessor is handled data; Usb circuit links to each other with microprocessor through UART; Microprocessor links to each other with the Zigbee radio receiving transmitting module through UART, State Control EBI, realizes swap data and the function of sending order; The data encapsulation that the Zigbee radio receiving transmitting module transmits microprocessor becomes the Frame of Zigbee protocol format, outwards sends.Power supply adopts essential safe type, and entire circuit is installed in the airtight container.
As shown in Figure 2, total system comprises wireless sensor node, gateway, Ethernet and Surveillance center.Said wireless sensor node is mainly accomplished collection, processing, the compression of data, and node utilizes the ZigBee radio receiving transmitting module, adopts the Routing Protocol of balancing energy, constitutes network with the wireless Ad Hoc form, and control data such as sends and receive at function.Said gateway is mainly realized conversion and the forwarding of data between ZigBee agreement and ICP/IP protocol.Cable network before the said Ethernet feeling the pulse with the finger-tip.Described Surveillance center refers to a specific workplace with server and PC, and the PC of Surveillance center is equipped with monitoring software, and can receive, handles and monitor the data that transmit through Ethernet.
As shown in Figure 3, microprocessor module adopts single chip computer AT Mega1281.U1:ATMega1281 and external apparatus interface module are the cores of circuit, are responsible for the processing with data of calling of each module.ATMega1281, frequency of operation is 8MHz, carries the SRAM of 8KB and the FLASH storage space of 128KB; ATMega1281 is integrated hardware capability peripheral hardware comprises: 7 simulating signal input ports, 8 digital signal I/O mouths; 1 PWM timer; 2 UART interfaces, 1 I2C interface (many main supports), 1 USB interface.The requirement of the peripheral expansion equipment that I/O mouth that this chip is abundant and peripheral configuration can well satisfy wireless sensor node.The RTC clock chip is selected the DS3231SN of Maxim company for use, and operating frequency is 32.768Hz, links to each other with ATMega1281 through the I2C interface, and external clock is provided, the work of processor controls and dormancy period.USB interface is used for node and is connected with computing machine or compatible USB device, and calling program can be loaded in the microprocessor, and usb circuit links to each other with microprocessor through the UART interface, and chip adopts FT232RL, realizes the conversion of USB to serial UART interface.Micro SD Card storer links to each other with microprocessor through the SPI interface, is used for the storage of data, the maximum 2G capacity of supporting.
U2: sensor assembly, be responsible for the collection of data under the current environment, gathered the multiple sensors chip, comparatively comprehensively data message of monitored area is provided, each sensor links to each other with microprocessor through the I/O mouth.It is 808H5V5 that humidity sensor adopts model, is output as simulating signal, and voltage range 0.8～3.9V has surpassed the input reference signal of microprocessor, and needing be 0.48～2.34V through an electric pressure converter with conversion of signals earlier; It is MCP9700A that temperature sensor adopts model, is output as simulating signal, sends signal to microprocessor through Analog (I) mouthful; It is TGS2442 that the carbonomonoxide concentration sensor adopts model, this chip through carbon monoxide gas concentration not simultaneously the difference that gets of resistance value reflect relative carbon monoxide gas concentration, measurement range is at 30～1000ppm; It is SK-25 that oxygen concentration sensor adopts model, is output as simulating signal, sends signal to microprocessor through Analog (I) mouthful; It is TGS2611 that the sensing methane concentration device adopts model, through concentration of methane gas not simultaneously the difference that gets of resistance value reflect relative concentration of methane gas, measurement range is at 500～10000ppm; It is MPXAZ6115A that barometric pressure sensor adopts model, and measurement range is at 15～115kpa, and output voltage 4.75～5.25V has surpassed the input reference signal of microprocessor, and needing be 0.12～2.82V through an electric pressure converter with conversion of signals earlier.The work of each sensor synergism realizes the collection of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment, and data are sent to microprocessor module handle.
The U3:ZigBee radio receiving transmitting module is responsible for the transmission and the acceptance of data, is connected to microprocessor through UART.The ZigBee radio frequency transceiving module can be selected the XBee module of DIGI company for use; Need not to dispose radio-frequency module; Can compatible 802.15.4 agreement, be main frequency range with 2.4GHz, simultaneously also support performance in 868MHz and two kinds of different frequency ranges of 915MHz; Module is built-in protocol stack, can debug through X-CTU and this two software of ZigBee Operator.
As shown in Figure 4, node has ON, Sleep, Deep Sleep, four kinds of operational modes of Hibernate.Node can utilize sleep (), deep sleep (), hibernate () function to corresponding three kinds of energy saver mode: Sleep, Deep Sleep and Hibernate pattern, through interrupt request node to be waken up to the ON pattern from three kinds of energy saver modes from the ON mode switch again through programmed control.Current drain is 9mA under the ON pattern, and current drain is 62 μ A under Sleep and the Deep Sleep pattern, and current drain is 0.7 μ A under the Hibernate pattern; This design can reduce the consumption of node energy, extends working time.Interruption is divided into two kinds of sync break and asynchronous interrupt: sync break comprises the inside watchdog time that ATMega1281 carries by clock control---WDT and RTC clock interrupt; Asynchronous interrupt depends on external event, does not receive clock control, comprises the look-at-me and the low electric weight warning interruption of sensor chip.All interruptions can wake up to the ON pattern from Sleep pattern or Deep Sleep pattern with node, but have only the sync break of RTC clock could node be waken up to the ON pattern from the Hibernate pattern.
As shown in Figure 5, microprocessor may be received four kinds of look-at-mes, comprises Watchdog, RTC, Sensors (sensor) and Low_Bat (low electric weight warning).RTC and Sensors interrupt request are sent to the ATMega1281 microprocessor chip through the RXD1 pin; The Low_Bat interrupt request is sent to the ATMega1281 microprocessor chip through the TXD1 pin; The WatchDog interrupt request is sent to microprocessor chip through the DIGITAL0 pin.Solid line is the look-at-me link, and dotted line is the control signal link.
Claims (5)
1. multisensor sensing node under the complicated environmental condition; It is characterized in that: comprise microprocessor module; The sensor assembly that is connected with microprocessor module respectively, Micro SD Card storer, RTC clock module, power circuit module and Zigbee radio receiving transmitting module; Each module is controlled and is called in the microprocessor module unification; Realize the collection of temperature, air humidity, oxygen concentration, methane concentration, carbonomonoxide concentration and atmospheric pressure data under the current environment, and the processing of data in real time and transmission, and through wireless mode transmission data.
2. multisensor sensing node under a kind of complicated environmental condition according to claim 1 is characterised in that: described sensor assembly comprises temperature sensor, humidity sensor, carbonomonoxide concentration sensor, oxygen concentration sensor, sensing methane concentration device and barometric pressure sensor.
3. multisensor sensing node under a kind of complicated environmental condition according to claim 1 is characterised in that: node adopts the Routing Protocol of balancing energy, constitutes network with the wireless Ad Hoc form, and data are sent to aggregation node through the trunking scheme of multi-hop.
4. multisensor sensing node under a kind of complicated environmental condition according to claim 3 is characterised in that: node has ON, Sleep, Deep Sleep, four kinds of operational modes of Hibernate.
5. multisensor sensing node under a kind of complicated environmental condition according to claim 1 is characterised in that: described microprocessor module adopts single chip computer AT Mega1281.
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| CN103291363A (en) * | 2013-05-27 | 2013-09-11 | 江苏三恒科技股份有限公司 | Mining wireless pressure acquiring substation |
| CN105471463A (en) * | 2015-12-29 | 2016-04-06 | 广东工业大学 | USB rechargeable ZigBee network wireless air pressure sensor |
| CN105973294A (en) * | 2015-03-11 | 2016-09-28 | 高翊恒 | Information collection analysis method and system for primary and high school student middle-distance race |
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| US20090238319A1 (en) * | 1993-08-31 | 2009-09-24 | Phillip Miller | Modular, portable data processing terminal for use in a radio frequency communication network |
| CN201753617U (en) * | 2010-03-12 | 2011-03-02 | 常熟市智胜信息技术有限公司 | Portable harmful gas sensing module for mines |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103291363A (en) * | 2013-05-27 | 2013-09-11 | 江苏三恒科技股份有限公司 | Mining wireless pressure acquiring substation |
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| CN105973294A (en) * | 2015-03-11 | 2016-09-28 | 高翊恒 | Information collection analysis method and system for primary and high school student middle-distance race |
| CN105471463A (en) * | 2015-12-29 | 2016-04-06 | 广东工业大学 | USB rechargeable ZigBee network wireless air pressure sensor |
| WO2017113463A1 (en) * | 2015-12-29 | 2017-07-06 | 广东工业大学 | Usb rechargeable wireless air pressure sensor based on zigbee network |
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Application publication date: 20120718 |