超声波传感器GH-311引脚功能1、 技术指标：输入电压： 6-12V(DC)最大输入电流： 2mA输出信号（OUT脚输出电平）: 0-5V （输出高范围中的障碍)测量角度： 最大 15 度测量距离： 2 毫米-80 800mm超声波频率： 40 千赫。引脚： 3个1 / 72.用法：电源模块提供6-12V电压，则输出脚OUT在有障碍时输出5V ，或无障碍时输出 0V。注意： 该模块应在启动电源之前插入的电路，以避免误操作产生高电平；否则，重新打开电源。模块工作原理：(1) IO触发：供给电路至少10us的高电平序列信号(2) 模块自动发送8组 40千赫的方波，并自动检测是否接收到返回的脉冲信号(3) 如果有信号返回，通过输出高电平，且高电平持续的时间是从对超声波发射到接收的时间。测试距离 = 高电平时间X声音速度 (即340 M/S) / 2。3.优势：简单易用；定向传播，可避免中断 ；持久耐久4.注意:本模块不能用于远程距离测量。5、 直流负载：6.交流负载：英文版原文：Arduino Ultrasonic Sensor GH-3111.Specification：Voltage : 6-12V(DC)Current : max 2mAOutput Signal : 0-5V (Output high when obstacle in range)Sentry Angle : max 15 degreeSentry Distance : 2mm-8000mmFrequency : 40Khz.Pin : 3pin 2.Usage：Supply module with 6-12V, the output will be 5V while obstacle in range, or 0V if not.The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules,Note : the module should be inserted in the circuit before been power, which avoid producing high level of misoperation ；if not, then power again.Module Working Principle:(1) Adopt IO trigger through supplying at least 10us sequence of high level signal,(2) The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal,(3) If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving.Test distance = (high level time * sound velocity (340M/S) / 2,3.Advantage :Simple，easy to adopt in system ; Beam angle to avoid disruptions;Endurable.4.Notice :This module can not be used for distance measurement.5.DC load :6.AC load： （注：本资料素材和资料部分来自网络，仅供参考。请预览后才下载，期待您的好评与关注！）