CN103680098A

CN103680098A - Temperature/humidity detection system based on wireless network

Info

Publication number: CN103680098A
Application number: CN201310655320.6A
Authority: CN
Inventors: 王思璇; 徐晓声; 王志鹏; 郭坤祺
Original assignee: ZHENJIANG KUN QUAN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: ZHENJIANG KUN QUAN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-12-06
Filing date: 2013-12-06
Publication date: 2014-03-26

Abstract

The invention belongs to the technical field of wireless communication and information acquisition and processing, and especially relates to a temperature/humidity detection system based on a wireless network. A traditional temperature/humidity detection system generally employs a person-guarding or wired-acquisition manner, and is relatively low in detection efficiency. The cable data acquisition has the problems of difficult wiring, large power consumption, high cost and the like. Aiming at the problems of low efficiency, large power consumption, high cost and the like existing in the traditional temperature/humidity detection system of greenhouses, the wireless temperature/humidity detection system is designed. The system employs a SHT11 sensor as a temperature/humidity acquisition terminus and is capable of performing real-time detection on the temperature/humidity of multiple greenhouses at the same time; the system has the advantages of low cost, less power consumption, fat transmission distance and the like; and the system is more practical than the traditional detection system, and provides certain technical support for temperature/humidity detection on multiple greenhouses.

Description

A kind of humiture detection system based on wireless network

Technical field

The invention belongs to radio communication, information acquisition and processing technology field, relate in particular to a kind of humiture detection system based on wireless network.

Background technology

In recent years, along with popularization and the development of agriculture in greenhouse, the life that the plantation of warmhouse booth is people brings great convenience.The envirment factors such as the growth of crops and the temperature in booth, humidity, illuminance have very large relation.The humiture that therefore, can detect timely and accurately warmhouse booth has important practical significance.

ZigBee technology is a kind of short-distance wireless communication technology, is one of current hot spot technology.The generation of ZigBee technology and the signal wireless transmission that develops into sensor provide a kind of new solution.Zigbee protocol is a kind of wireless network protocol of low speed short-distance transmission, is respectively from top to bottom Physical layer (PHY), MAC layer (MAC), transport layer (TL), network layer (NWK), application layer (APL) etc.The principal feature of ZigBee-network is low cost, low complex degree, support great deal of nodes, supports multiple network topological structure, and whole inter-net communication is quick, reliable, safety.Major equipment in ZigBee-network can be divided into telegon (Coordinator), aggregation node (Router), sensor node (EndDevice) Three role.In radio sensing network, the Main Function of telegon has been the selection of initial channel, to network configuration initialization, accept adding of child node; The Main Function of router is the forwarding that participates in data, by allowing other node to add to come the coverage of extended network; Terminal is mainly responsible for connecting with router, and the data that collect are sent to focal point.Aspect route, ZigBee supports the route of the mesh network that reliability is very high, is applicable to the network of wide range, and supports multicast and broadcast characteristic.

Summary of the invention

1. technical matters to be solved

The general manually on duty or wired acquisition mode that adopts of traditional temperature/humidity measuring system, detection efficiency is lower.Cable data collection exists that difficult wiring, power consumption are large, high in cost of production problem.

2. technical scheme

In order to overcome the above problems, the invention provides a kind of humiture detection system based on wireless network, comprising: host computer (PC) monitoring client and slave computer ZigBee network two parts.Slave computer ZigBee network system is responsible for gathering the humiture data in warmhouse booth, and host computer is responsible for showing humiture data and is monitored in real time.Slave computer ZigBee network system is comprised of Temperature Humidity Sensor module, router-module and coordinator module.Temperature Humidity Sensor module is mainly responsible for gathering, storing and upload humiture information.Router-module is mainly responsible for forwarding humiture information.Coordinator module mainly completes converging of humiture data.Between slave computer ZigBee network system and host computer, by RS-232 serial ports, communicate.When detecting green house temperature-humidity information, first by upper computer end monitoring software, set the parameters such as baud rate and string slogan, then telegon starts to set up ZigBee network.At this moment router node and Temperature Humidity Sensor node start to add ZigBee network.The temperature and humidity sensing module being distributed in each booth starts to gather humiture information, and be stored in Flash, mode by single-hop or multi-hop sends to host computer, and ipc monitor termination is received after humiture information, and the humiture information in each booth is shown.When humiture information is abnormal, at monitoring client, have abnormal prompt, to process in time.

Hardware design

The hardware design of system comprises two parts: Temperature Humidity Sensor module, router and coordinator module

Temperature Humidity Sensor module

Sensor adopts the SHT11 sensor in Sensirion Temperature Humidity Sensor family, and it is the high-accuracy temperature-humidity sensor of a super low-power consumption, and its temperature acquisition precision can reach 0.4 ℃, and humidity collection precision can reach 3%RH; Temperature measurement range is-40 ℃ ~ 123.8 ℃, and moisture measurement scope is 0%RH ~ 100%RH; Adoptable voltage range is 2.4 V ~ 5.5 V; Energy consumption is only 1 μ W ~ 30 μ W[5].CC2530 is connected as shown in Fig. 1 with SHT11 hardware.SHT11 has 8 pins, GND, DATA, SCK, VDD, and all the other 4 pins are idle.For avoiding signal to clash, between DATA and VDD, connect a pull-up resistor.Between VDD and GND, add an electric capacity, in order to decoupling filtering.SHT11 application strings Serial Communication directly sends data to single-chip microcomputer, is connected respectively, for realizing communication synchronization and data transmission with the P0_1/P0_0 of general purpose I/O mouth P0 of CC2530 with the serial time clock line SCK of SHT11 with serial data line DATA.The interface between sensor and single-chip microcomputer had both been simplified in this design, had improved again the stability of system.

Router and coordinator module

Router-module is the same with coordinator module on hardware configuration, and they do not participate in the collection of humiture information.Telegon is connected with host computer by RS-232 serial ports.Why router designs RS-232 interface, is because when telegon meets accident situation about damaging, can directly substitute telegon with router-module.Make system more practical.The hardware block diagram of router and telegon is as shown in Fig. 2.

Software for Design

System software partly comprises that humiture information acquisition and transmitting portion, humiture information receive and display section.Process flow diagram is respectively as shown in Fig. 3 and Fig. 4.

Temperature and humidity sensing module energy consumption detects

Test connects block diagram as shown in Figure 5.Wherein electric battery adopts two joints 1. the mode of 5 V dry cell series connection.Before test, first give coordinator module and Temperature Humidity Sensor module punching electricity, after the normal work of system, with showing

The voltage at ripple device measuring resistance two ends.Magnitude of voltage and resistance value that utilization records calculate average power consumption.By the data error of the wireless humiture supervisory system based on ZigBee technology of design is tested, result shows that the humidity error of native system can be controlled in 3%RH, temperature error can be controlled at 0.4 ℃ to adopt STC12C5A60S2 single-chip microcomputer in conjunction with the wireless system for transmitting data of the running of oil extractor in oil field electric parameter measurement of KYL-1020L module composition, the more severe block of cells trial run of an environment in certain oil field, its effect or more satisfactory.This system has alleviated upper well personnel's working strength, has improved the efficiency of data acquisition.The data that receive by wireless transceiver system are compared with the data of directly upper well collection, and the error code rate of transceiving data is very low, is relatively adapted at oil field and applies.

3. beneficial effect

Native system and traditional temperature/humidity measuring system comparison, overcome the detection efficiency existing in traditional temperature/humidity measuring system low, and difficult wiring power consumption is large, high in cost of production difficult point.Thereby can detect timely and accurately the humiture of warmhouse booth.

Accompanying drawing explanation

Fig. 1 CC2530 and SHT11 hardware connection layout

Fig. 2 router, coordinator module hardware block diagram

The information acquisition of Fig. 3 humiture and transmission flow figure

Fig. 4 humiture information receives and flow for displaying figure

Fig. 5 Temperature Humidity Sensor module power consumption test line block diagram

Embodiment

Below by embodiment, the present invention is described in detail.

Embodiment 1

Its working method is as follows:

Whole technological core is the wireless humiture detecting system design of ZigBee technology, utilizes ZigBee technology to reach the object that humiture is accurately detected.

First, needed equipment is ready to, understands the ultimate principle of ZigBee technology, with and relevant device, hardware module and the software module used.

Then, complete the design of correlation module.And the building of ZigBee network of relation.

Finally, gather, store and upload humiture information, forward humiture information.And complete converging of humiture data.

Claims

1. the humiture detection system based on wireless network, comprise: host computer (PC) monitoring client and slave computer ZigBee network two parts, slave computer ZigBee network system is responsible for gathering the humiture data in warmhouse booth, and host computer is responsible for showing humiture data and is monitored in real time.

2. a kind of humiture detection system based on wireless network as claimed in claim 1, is characterized in that: slave computer ZigBee network system is comprised of Temperature Humidity Sensor module, router-module and coordinator module.

3. a kind of humiture detection system based on wireless network as described in claim 1-2, it is characterized in that: Temperature Humidity Sensor module is mainly responsible for gathering, storing and upload humiture information, router-module is mainly responsible for forwarding humiture information, and coordinator module mainly completes converging of humiture data.

4. a kind of humiture detection system based on wireless network as described in claim 1-2, it is characterized in that: between slave computer ZigBee network system and host computer, by RS-232 serial ports, communicate, when detecting green house temperature-humidity information, first by upper computer end monitoring software, set the parameters such as baud rate and string slogan, then telegon starts to set up ZigBee network, and at this moment router node and Temperature Humidity Sensor node start to add ZigBee network.

5. a kind of humiture detection system based on wireless network as described in claim 1-4, it is characterized in that: the temperature and humidity sensing module being distributed in each booth starts to gather humiture information, and be stored in Flash, mode by single-hop or multi-hop sends to host computer, ipc monitor termination is received after humiture information, the humiture information in each booth is shown, when humiture information is abnormal, at monitoring client, have abnormal prompt, to process in time.