Wireless Alarm System Based On GPRS

At present the data acquisition and alarm system that constitutes by 8 bit Singlechip has widely applied in industry control, hydrographic survey, meteorological survey, environmental monitoring and so on. These systems use RS232, RS485 cany on the communication generally, although the economy is practical, constructs simply, but its transmitting range receives limits, causes many situations to be unable to use.In order to solve in acquisition and alarm system, each acquisition distributed scope broad, the quantity are many, far away and also possibly is situated remotely, is unable to use has question and so on wire. This thesis researched one kind of new acquisition and alarm method - based on the GPRS wireless alarm system, used the existing GPRS network resources, the display network coverage fraction high, the transmission characteristic good and so on the superiority, provided one kind to the existing alarm system to be convenient wireless reports to the police the way, this will certainly into domain the and so on industry control and scene monitor development tendency, and might widely apply in An Fang reports to the police, the electric power monitoring reports to the police, profession and so on petroleum, mine.This wireless alarm system adopts method of alarm module and the data acquisition module separates mutually, this not only causes the data acquisition module to be possible in the permission scope the unlimited extent among, at the same time also facilitated the gathering module which had to join, composed the distributional data acquisition array. The system reported to the police the module to use the advanced 32 ARM processor and μ C/OS- Ⅱ real-time operating system, but acquisition the module then has used antijamming ability, driving force strong 8 PIC series chip. Reported to the police the module success to realize μC/OS- Ⅱ transplant, the GPRS news transmission, the LCD data display, the keyboard data feeds, report to the police the module and the data acquisition module data communication and so on many functions;The data acquisition module then has realized temperature gathering and with reports to the police the module data communication. After the experimental movement, the movement result proved that, the system each technical performance target has basically met the design requirements. The success realized the non-continual data long-distance range to report to the police, provided one convenient wireless data transmission way for the long-distance range data alarm system, might replace existingwired reports to the police the supervisory system.The thesis introduced the issue research background, the research purpose and the system function analysis;And introduced the system design plan in detail, including microprocessor choose, real-time operating system u C/OS- II transplants, GPRS protocol, MODBUS protocol, system communication protocol design and so on;The specify LPC2114 board level start code, various modules driver, the system task has realized as well as the alarm system multi- duties dispatch strategy;The article has analyzed the system circuit principle of design, has provided the partial hardware circuit design schematic diagram;Finally has carried on the analysis appraisal to the system, proposed the future work direction.