利用超声波智能测距传感器及语音录放电路，设计了机动车倒车防撞语音提示器。
Using ultrasonic wave intelligent distance-measuring sensor and voice record-reproducing circuit, a voice anticollision-prompting device for backing an automobile is designed.
测距是利用超声波传感器来实现，光强检测是通过光敏元件实现，定时功能由89c52单片机定时器实现的。
Distance measurement is realized by ultrasonic sensors, light intensity detection is achieved by photosensitive element, timer function is realized by 89c52's timer.
这些包括照相机，超声波，红外线和热传感器，一个测距仪传感器，温度传感器和地面探测器。
These include a camera, ultrasound, infra-red and thermal sensors, a range-finder sensor, a temperature sensor and ground detectors.
根据超声波测距的基本原理，结合温度传感器对声速参数进行了修正，使得系统在不同环境下都能达到检测要求。
On the basis of ultrasonic, the system referred in the paper USES DS1820 for temperature correction, so as to reach the measurement demand in different environment.
根据超声波测距的基本原理，结合温度传感器对声速参数进行了修正，使得系统在不同环境下都能达到检测要求。
On the basis of ultrasonic, the system referred in the paper USES DS1820 for temperature correction, so as to reach the measurement demand in different environment.
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