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Description: 超声测距,外围用LM567音频解码器来锁定接受的声波频率，程序里用的是40KHZ,发送200ms，然后等待接受进行中断。里面只有程序，外围电路很简单，注意要把信号放大。-Ultrasonic ranging, external LM567 audio decoder to use to lock in acceptable sound wave frequency, the program inside using a 40KHZ, send 200ms, and then waiting for interrupt. Only inside the program, the external circuit is very simple, pay attention to make signal amplification.
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Size: 5120 |
Author: fgfgf |
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Description: 基于AT89C52的手持式激光超声测距仪，通过启动发送超声脉冲串开始计时，接收回波结束计时，同时测量周围环境温度，利用测得的温度进行修正声音在空气中传播的速度，该速度乘上传播时间除2即得到障碍物的距离。-AT89C52-based hand-held laser ultrasonic range finder, ultrasonic pulse through the string to start sending start time, receiving echo the end of time, simultaneous measurement of ambient temperature, using the measured temperature of amendments to the transmission of sound in air speed, the speed by spread their time, two obstacles that get away.
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Size: 10240 |
Author: 赵文龙 |
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Description: HC-SR04超声波测距模块可提供 2cm-400cm的非接触式距离感测功能，测
距精度可达高到 3mm；模块包括超声波发射器、接收器与控制电路。
基本工作原理：
(1)采用IO 口TRIG 触发测距，给最少10us 的高电平信呈。
(2)模块自动发送8 个40khz 的方波，自动检测是否有信号返回；
(3)有信号返回，通过IO 口ECHO 输出一个高电平，高电平持续的时间就是超声-HC-SR04 ultrasonic ranging module provides 2cm-400cm non-contact distance sensing capabilities, ranging accuracy up to high to 3mm module includes ultrasonic transmitter, receiver and control circuit. The basic working principle: (1) IO port TRIG trigger ranging to the least 10us HIGH letter was. (2) the module automatically sends eight 40khz square wave, automatically detects whether a signal return (3) the signal is fed back through the IO port ECHO outputs a high level, high level duration ultrasound
Platform: |
Size: 1463296 |
Author: hushi |
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Description: 本程序主要实现超声系统测距，通过学习本程序可以理解超声的发送接收原理。-The main procedures ranging ultrasound system, this program can be understood by studying the principles of ultrasound transmission and reception.
Platform: |
Size: 2048 |
Author: barry |
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Description: 基于ep4ce6e22c8n 的超声发送fpga程序代码，实际工程验证。
Platform: |
Size: 3146858 |
Author: liusongmei |
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