| Fire alarm system attracts the most attention in the field of firedetection and alarm at home and abroad. Based on ZigBee wirelesscommunication technique, a kind of fire information transimission systemis put forward and designed that focus on the problems, such as high faultrate, error warning rate and route ageing and so on, which are perfectlysetteled.In the paper, the major content is as follows:(1) The ZigBee technique is applied to the field of fire alarm at thefirst time. ZigBee technique is led into the fire alarm system which makesthe rate of fault and error warning etc. Contrast to the traditional wire firealarm system, this system avoids the trouble of route ageing, erosion,rat-bite, wear and so on.(2) The star network topologies are adopted. Each detection nodecan been either transmitting terminal as well as reception terminal.According to the sensor position, the nodes could be set as coordinator.And the ZigBee network could hold 65 535 nodes at most, which meetsthe actual needs.(3) The software data structure, software flow chat and detailprogramming are listed at all. The method of software antijamming byusing arithmometer T0 delay 90ms and the method of hardwareantijamming by using 1117 making the stabilized source are combined inthis system.(4) The hardware design adopts the STC89LE516AD controller andCC2500 transceiver based on the ZigBee technical standard, which makeseach node has data handling capacity and communication capability.The measure result indicates that the fire alarm system has thecharacteristics of low cost, stable operation and good function. |
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