摘要
在超声波测距技术中,超声波频率太高,衰减越快,影响测量范围;超声波频率太低,受外界杂音干扰越大,测量精度降低。为了避免这一问题,系统采用40kHz的超声波8～16个脉冲群,以CX20106A集成芯片作为接收电路。硬件采用单片机AT89C51作为信号控制与处理电路,软件采用C语言程序。经测试表明,测距系统范围为0.05～3m,相对对误差小于3%。可在测量精度较高的环境中应用。
In the ultrasonic ranging technology, ultrasonic waves are too high in frequency, attenua- tion faster, impact measurement range; ultrasonic frequency is too low, affected by the outside noise interference is greater, low measurement accuracy. In order to avoid this problem, the system adopts 40 kHz ultrasonic 8 ～16 pulse group, with CX20106A integrated chip as the receiving circuit. The hardware used AT89C51 microcontroller as a signal control and processing circtiit, the software adopts C language program. The test results show that：the ranging system within the range of 0.05～ 3 m, the relative error is less than 3 ~. Can be used in high precision in the environment.
出处
《机械与电子》
2013年第8期66-69,共4页
Machinery & Electronics
基金
陕西工业职业技术学院院级科研项目
