CN101950173A

CN101950173A - Remote greenhouse environment monitoring system based on distributed structure

Info

Publication number: CN101950173A
Application number: CN2010102925757A
Authority: CN
Inventors: 赵虎; 王三根; 吴达科; 王纪元
Original assignee: Southwest University
Current assignee: Southwest University
Priority date: 2010-09-27
Filing date: 2010-09-27
Publication date: 2011-01-19

Abstract

A greenhouse environment monitoring system based on distributed structure comprises single chips, sensor modules, a remote communication module and a CAN bus module. The core of the invention is a control system formed by the single chips connected by the CAN bus and is applicable to the systems with low real-time property, more peripheral devices and longer program development period, therefore, the greenhouse environment monitoring system has the greatest advantages of adopting low-end 8-bit or 16-bit single chips, dispersing each driver to the special single chip for completion, shortening the development period, reducing the maintenance difficulty and realizing modular design.

Description

Greenhouse remote supervision system based on distributed frame

Technical field

The present invention relates to the industrialized agriculture technical field, particularly relate to a kind of greenhouse remote supervision system based on distributed frame.

Background technology

Centralizedly two kinds of different mentalities of designing have been represented with distributed computing technology.The core concept of integrated system is to adopt single control system, all sensor signals all send back control system, the control system issuing command removes to control all peripheral components simultaneously, its advantage is that hardware configuration is simple, shortcoming is all software and hardwares all to be focused on the single processor can prolong development time and proving period, if software size doubles, to be certain to be more than the original twice development time so, in case and processor breaks down, total system will be paralysed.Distributed system is that every kind of task is adopted the application specific processor of small-scale, with system divides is the part of a plurality of littler, better management, master controller only need obtain data from corresponding application specific processor, perhaps the processor to appointment sends instruction, and do not relate to concrete operating process, the benefit of bringing is that software development cycle shortens, and the fault of single processor can not influence the operation of total system.From price relatively, distributed system be owing to can take 8 single-chip microcomputers as application specific processor, though quantity is more, compares 32 bit processors that integrated system must adopt high-performance, high price as main control chip, and the two price is equally matched.

The greenhouse monitoring system is specifically related to aerial temperature and humidity sensor, soil temperature and humidity sensor, CO ₂Peripheral components such as concentration sensor, intensity of illumination sensor, up-to-date long distance control system has also added telecommunication modules such as GSM or GPRS, the characteristics of this type systematic are that data volume is little, real-time is not strong yet, if but all sensors and telecommunication module are realized with a single-chip microcomputer, will run into software compatibility issue during design.At present the most frequently used solution is to adopt uC/OSII or uLinux embedded OS, realizes multitask system with the mode of multithreading.Can run into two problems so again, the one, the single-chip microcomputer that can embed the aforesaid operations system is that chip price or PCB cost of manufacture are all more expensive, the 2nd, the embedded OS exploitation is different fully with microcomputer development, for the technician who is familiar with microcomputer development, learning difficulty is bigger, and the program of accumulation in the past all needs to remodify and transplant.

Therefore need a kind of multitask hardware platform towards the microcomputer development personnel, a kind of reasonable thinking is to adopt distributed frame, each sensor and communication module are hung on the different application specific processors, with bus all sensors are coupled together, carry out the transmission of signal and data.As long as can grasp 8 microcomputer development technology like this, just can develop multitask system, no matter be from hardware cost, still from software development cycle, this type systematic all has very big advantage.Yet there are no the report that similar hardware platform is applied to the greenhouse monitoring system.

Summary of the invention

Problem in view of above prior art exists the object of the present invention is to provide a kind of greenhouse monitoring system based on distributed frame, and this system is made up of single-chip microcomputer, sensor assembly, telecommunication module and CAN bus module; Single-chip microcomputer is selected 8 or 16 low performance single-chip microcomputers such as 51 single-chip microcomputers or PIC single-chip microcomputer for use, and sensor assembly comprises aerial temperature and humidity sensor, soil temperature and humidity sensor, CO ₂Sensor and intensity of illumination sensor, the telecommunication module is selected gsm module for use, and these modules all hang over switching signal and data on the CAN bus module, and wherein any one module damage can not influence the work of other modules; If changed new module, also only need to revise the program of special-purpose single-chip microcomputer, and needn't revise the program of other modules.

Preferred disposition is as follows: single-chip microcomputer STC89C52, SHT10 type aerial temperature and humidity sensor, SHT10P type soil temperature and humidity sensor, gsm module TC35, BH1710FVC type intensity of illumination sensor, H-550 type CO ₂Concentration sensor, SJA1000 bus controller and PCA82C250 bus transceiver.

Description of drawings

Fig. 1 is based on the greenhouse remote supervision system hardware structure diagram of distributed frame.

Advantage of the present invention is, because the control system that the single-chip microcomputer that core of the present invention is connected by the CAN bus forms, be applicable to the system that real-time is not strong, peripheral components is more, the program development cycle is long, therefore maximum advantage is to have adopted 8 or 16 single-chip microcomputers of low side, and each driver all is distributed on the special-purpose single-chip microcomputer finishes, shorten the construction cycle, reduced maintenance difficulties, realized modularized design.

Embodiment

Further specify the present invention below by embodiment, but should not be construed as limitation of the present invention.

A kind of greenhouse remote supervision system based on distributed frame, form by single-chip microcomputer, sensor assembly, gsm module and CAN bus module, single-chip microcomputer adopts STC89C52, every single-chip microcomputer only need be finished simple function, comprises that aerial temperature and humidity detects, soil temperature and humidity detects, intensity of illumination detects, CO ₂Concentration detection and GSM communication etc.; The CAN bus module comprises SJA1000 bus controller and PCA82C250 bus transceiver, is responsible for transmitting signal and data.Native system does not have traditional control core, each sheet single-chip microcomputer is all independently finished work separately, have only when the user sends short messages the needs inquiry, just send query statement on the CAN bus by single-chip microcomputer 1, call the real time data of single-chip microcomputer 2-5, and automatically return on user's the mobile phone (the system architecture synoptic diagram is seen Fig. 1).The user in time obtains notice when guaranteeing that system breaks down, specialized designs of the present invention the self diagnosis link: when system works, send detection signal successively to single-chip microcomputer 2-5 by single-chip microcomputer 1,, illustrate that these single-chip microcomputers are working properly if obtained correct return signal; If the abnormal signal that certain a slice single-chip microcomputer work is returned illustrates that then this module has unusually, at this moment just send note and remind the user in time to safeguard.

Because the CAN bus can expand to 110 modules at most, so the extensibility of native system is very strong, can satisfy common designing requirement substantially.When needs added new module, only need were transplanted to this modules driver on the special-purpose single-chip microcomputer, and did not need to revise the program of other modules.Because that adopt is modal 8 single-chip microcomputer STC89C52,, safeguard very easy so the research and development of system and transplanting are all very convenient.The design provides a kind of hardware platform of finishing the multitask system design for the designer who is familiar with microcomputer development, owing to having adopted the self diagnosis link to have very high reliability.

Claims

1. the greenhouse monitoring system based on distributed frame is characterized in that, this system is made up of single-chip microcomputer, sensor assembly, telecommunication module and CAN bus module; Single-chip microcomputer is selected 51 single-chip microcomputers or PIC single-chip microcomputer for use, and sensor assembly comprises aerial temperature and humidity sensor, soil temperature and humidity sensor, CO ₂Sensor and intensity of illumination sensor, the telecommunication module is selected gsm module for use, and these modules all hang over switching signal and data on the CAN bus module.

2. system according to claim 1, it is characterized in that, dispose as follows: single-chip microcomputer STC89C52, SHT10 type aerial temperature and humidity sensor, SHT10P type soil temperature and humidity sensor, gsm module TC35, BH1710FVC type intensity of illumination sensor, H-550 type CO ₂Concentration sensor, SJA1000 bus controller and PCA82C250 bus transceiver.