摘要
装置在预定轨道两端距离S固定的两组干簧管对物体分别通过传感器时所引起的磁场变化的物理信号转换为电信号并由信号传输电路将其传输给单片机。单片机记录物体通过两组干簧管所用的时间T,用V=S/T计算出平均速率,当S足够短时即可将平均速率V看做是物体通过该段位移的瞬时速率。显示出该速率,当超过设定速度时蜂鸣器即可进行预警。通过反复实验,本装置测速精度较高,符合低速高精度的测量,并且价廉物美,易于推广。
This device is installed in a predetermined orbit at both ends of two groups of reed.The physical sig-nal of the magnetic field induced by the sensor is converted to electrical signal.The signal transmission circuit transmits the signal to the single chip microcomputer.The recorded object through two groups of reed with the time ‘T＇,the average rate is calculated by V = S/T,and the average rate V can be regarded as the instantane-ous rate of the displacement of the object through the‘S＇.The average is rate.It shows that the rate,when more than the set speed,it can run a buzzer alarm.Through it is repeated experiments,the speed measuring device with high precision,in line with the speed and high precision measurement,and cheap,easy to promote.
作者
方路线
FANG Lu-xian(Wuhan Institute Technology,Hubei Wuhan 43000)
出处
《大学物理实验》
2016年第5期33-37,共5页
Physical Experiment of College
关键词
干簧管
测速
单片机
预警
tongue tub
measurement
MCU
early warning
