基于ZigBee和GSM的高速公路自适应限速系统

Adaptive Speed Limit System of Highway Based on Zig Bee and GSM

为了让驾驶员及时获得不良天气下高速公路车辆限速信息,设计了基于Zig Bee和GSM的高速公路自适应限速系统。系统中MSP430对气象数据进行处理,并根据限速准则计算出当前天气条件下的限速信息,若判断和上1 min计算的值不同则通过GSM网络更新路边装置限速信息。当车辆行驶至路边装置的Zig Bee网络范围内时就会收到限速信息,若限速信息发生变化则车载装置液晶显示并语音播报。测试结果表明:在路边装置Zig Bee网络范围内车载装置能够正常接收到限速信息。

In order to let drivers acquire highway speed limit information,we design the adaptive speed limit system of highway based on Zig Bee and GSM. MSP430 microcontroller deals with meteorological data and calculates speed limit information on the highway in current weather condition according to speed limit formula. If it is different from the value calculated in last minute,speed limit information of roadside devices will be updated by GSM network. Vehicle will receive speed limit information when driving to the scope of Zig Bee network of roadside device,if information is changed,vehicle-mounted device will display it on LCD screen and broadcast recording. Test result shows that： vehicle-mounted devices can receive speed limit information normally in the scope of Zig Bee network of roadside device.