CN104821071A - WSN-based environmental quality monitoring system - Google Patents

Abstract

The invention discloses a WSN-based environmental quality monitoring system. The system comprises a sensor node, a ZigBee-IP gateway and a user monitoring terminal. The sensor node comprises a master control module, a sensor module and a transparent transmission module. The ZigBee-IP gateway comprises a ZigBee coordinator module and a Mini2440 data processing module. The user monitoring module adopts a bootstarp front end frame constructed user monitoring Web page. Through three sensors, humiture, illumination and dust parameters of an ambient environment are acquired at real time. A user can directly visit a corresponding website via a computer connected to the Internet so as to finish environmental monitoring of a target area. The system provided by the invention has characteristics of monitoring area randomness, expandability, convenient installation, simple maintenance, real-time monitoring and the like.

Description

Based on the environmental quality monitoring system of WSN

Technical field

The present invention relates to environmental quality monitoring field, particularly relate to a kind of environmental quality monitoring system utilizing WSN.

Background technology

Environment is the necessary condition that the mankind depend on for existence, and the quality of environmental quality is directly connected to the healthy of people.Particularly in some medium-and-large-sized cities, environmental quality has included the mark for weighing this city's synthetic power in.Although along with China is to the attention of environmental monitoring, environment department can send environmental information in real time to all citizens, but there is the regional differences of environment, often these environmental datas can not represent local environment actual conditions well, so design a set of region system that is indoor or surrounding enviroment of can measuring to seem particularly important.

Current environmental quality monitoring systems most relies on wire transmission, compared with traditional environmental quality monitoring system, use ZigBee wireless sense network have sensor node arrange the expansivity of random, sensor node quantity, sensor network communication without the feature such as linear.Overcome the difficult wiring of traditional environment monitoring system, the defects such as maintenance difficult and extendability difference.

Summary of the invention

The present invention is exactly the weak point for existing enviromental monitoring equipment, provides a kind of environmental quality monitoring system based on WSN.

The present invention includes sensor node, ZigBee-IP gateway and user monitoring terminal.

Described sensor node comprises main control module, sensor assembly, transparent transmission; Wherein sensor assembly, transparent transmission is all connected with main control module, and main control module selects MSP430G2553 single-chip microcomputer, and sensor assembly comprises optics dust sensor, Temperature Humidity Sensor and optical sensor.

Described ZigBee-IP gateway comprises ZigBee coordinator module, Mini2440 data processing module; The data of each sensor node converge by ZigBee coordinator module, Mini2440 data processing module by serial ports the Data Collection of each node to array, after statistic of classification is carried out to data, export with the form of Html text, make user can access sensors node data in a browser.

What described user monitoring terminal module adopted is that the user that bootstarp front end frame builds monitors Web page.

The PANID that described ZigBee coordinator module generates setting sets up ZigBee-network, and the sensor node search in ZigBee networking is mated PANID with self and joins this network; Environmental aspect data around sensor node Real-time Collection, comprise humiture, PM2.5 concentration and intensity of illumination, and the data collected are sent to ZigBee-IP gateway by wireless link; ZigBee-IP gateway is sent to internet by router after receiving data, and user carrys out the real time environment situation around real-time monitoring sensing device node by internet.

Beneficial effect of the present invention: the hardware device that the present invention selects is all low power consuming devices, wherein DHT11 Temperature Humidity Sensor standby current under common power pattern is only 100uA, normal work average current is 0.2mA, then more energy-conservation under unibus powering mode; MSP430G2553 single-chip microcomputer, have five kinds of energy saver modes, under normal operation mode, working current only has 230uA, only has 0.5uA under standby mode.In addition, ZigBee transparent transmission, PM2.5 sensor device all have the low power capabilities of superelevation, ensure that the energy-saving of system works.

The present invention is by the humiture of three kinds of sensor Real-time Collection surrounding environment, illumination and dust parameter, user directly just can complete the environmental monitoring to target area by the corresponding network address of the computer to access of connecting Internet, there is the randomness of guarded region, extensibility, easy for installation, the feature such as easy to maintenance and control real-time.The present invention goes for indoor and the monitoring of outdoor environment among a small circle, and user can make corresponding judgement by webpage Monitoring Data, and can control arbitrary node and open or close.

Accompanying drawing explanation

Fig. 1 is environmental quality monitoring system schematic;

Fig. 2 is monitoring system module composition schematic diagram;

Fig. 3 is MSP430 program flow diagram;

Fig. 4 is host computer Linux program flow diagram;

Fig. 5 is the web data display interface of system.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

As shown in fig. 1, a kind of environmental quality monitoring system based on WSN contains sensor node, telegon and host computer, router, internet and user terminal computer.Sensor node, telegon and host computer constitute ZigBee radio sensing network jointly, and wherein telegon and host computer and ZigBee-IP gateway are the entrances that radio sensing network and internet join.Sensor node is arranged in monitored area with having Objective, as office building, hospital, meeting-place or library etc.Select radio communication between sensor node and host computer, this is the layout owing to adopting wireless mode not only to facilitate start node, is also conducive to changing the position of sensor node at indoor monitoring at any time.The principle of work of system is: the PANID that ZigBee telegon generates setting sets up ZigBee-network, and the search of ZigBee sensor node is mated PANID with self and joins this network.Environmental aspect data around sensor node Real-time Collection: humiture, PM2.5 concentration and intensity of illumination, and the data collected are sent to ZigBee-IP gateway by wireless link.ZigBee-IP gateway is sent to internet by router after receiving data, and user carrys out the real time environment situation around real-time monitoring sensing device node by internet

Figure 2 shows that the detailed formation of monitoring system module, mainly comprise main control module 2-1(MSP430G2553 single-chip microcomputer), optics dust sensor module 2-2(Sharp GP2Y1010AU0F), DHT11 Temperature Humidity Sensor module 2-3, optical sensor module 2-4, ZigBee transparent transmission 2-5, Anneta module 2-6,2-7, the Linux server module 2-9 that ZigBee coordinator module 2-8, Mini2440 build, router two-10, user terminal computer 2-11.

Figure 3 shows that the program flow diagram of described main control module MSP430, perform initialization operation after system electrification, initialization content comprises the initialization of serial ports (38400), DHT11, ADC, button and LED.Next start multi collect data remove mean value and be saved in array, when there being order to be received, judgement sends data command or opening/closing device command, if transmission data command, data are uploaded according to certain format packing by system, if opening/closing device command, system is by judgement the corresponding command and execution opens or closes LED.

Figure 4 shows that host computer Linux program flow diagram, host computer Linux software mainly realizes the operation of Mini2440 to serial ports.Mini2440 by serial ports the Data Collection of each node to array, after statistic of classification is carried out to data, export with the form of Html text, make user can access node data in a browser.When software is performed, first initialization serial ports (38400 baud rate), then " transmission data " order is sent to each node, when node receives orders, immediately data will be returned, Mini2440 exports webpage, if do not receive data after Data classification statistics, system will circulate transmission instruction always, until there is corresponding data to receive.

Figure 5 shows that the Web observation interface of user terminal.Main functional modules can be divided into the description of product, Node distribution, Node Switch, resolution chart and data to check.The page uses iframe label to make each page on the same page, not carry out the redirect of address, facilitates user to carry out checking and managing like this.The wherein information of simple declaration sensor node position, Node distribution interface.Node Switch interface is that the BOA server on Mini2440 development board uses cgi (CGI (Common gateway interface)) file to process the relevant part of cellular logic.Here be provided with the switch key of four nodes of distribution, during switch opens, represent that node is opened, when switch cuts out, represent that node is closed.ZigBee-network is sent to the data of four nodes on Mini2440 development board respectively by serial ports: the numerical value of temperature, humidity, intensity of illumination and PM2.5.Presented in web data display page by the mode setting up chart.Chart passes through the instantaneous value of horizontal contrast four node same time same item number certificates, and every 3 seconds real-time update on the page.User can carry out the environmental aspect in monitoring objective region by Real Time Observation page data.

Below the preferred embodiment of the invention is illustrated, but the present invention is not limited to embodiment, those of ordinary skill in the art also can carry out all equivalent modification or replacement under the prerequisite without prejudice to the invention spirit, and these equivalent modification or replacement are all included in the scope of the application.

Claims (1)

1., based on the environmental quality monitoring system of WSN, comprise sensor node, ZigBee-IP gateway and user monitoring terminal; It is characterized in that:

Described sensor node comprises main control module, sensor assembly, transparent transmission; Wherein sensor assembly, transparent transmission is all connected with main control module, and main control module selects MSP430G2553 single-chip microcomputer, and sensor assembly comprises optics dust sensor, Temperature Humidity Sensor and optical sensor;

Described ZigBee-IP gateway comprises ZigBee coordinator module, Mini2440 data processing module; The data of each sensor node converge by ZigBee coordinator module, Mini2440 data processing module by serial ports the Data Collection of each node to array, after statistic of classification is carried out to data, export with the form of Html text, make user can access sensors node data in a browser;

What described user monitoring terminal module adopted is that the user that bootstarp front end frame builds monitors Web page;

The PANID that described ZigBee coordinator module generates setting sets up ZigBee-network, and the sensor node search in ZigBee networking is mated PANID with self and joins this network; Environmental aspect data around sensor node Real-time Collection, comprise humiture, PM2.5 concentration and intensity of illumination, and the data collected are sent to ZigBee-IP gateway by wireless link; ZigBee-IP gateway is sent to internet by router after receiving data, and user carrys out the real time environment situation around real-time monitoring sensing device node by internet.