Ultrasonic Sensor Theory and Serial Port Output Ultrasonic Rangding ModuleSensorsUltrasonic Distance Measuring Sensor Module

  This sensor provides a easy method for distance measurement and is widely used in robotics applications, which with a 3cm to 4m detecting range, it is widely used in robotics applications and is also useful in security systems or as an infrared replacement.

Features:

1,Small size, easy to use;

2,Low voltage, low power consumption;

3,Wide measurement range;

4,High accuracy;

5,Small blind;

Applications:

1,Measuring the space between objects;

2,Programmable car obstacle avoidance;

3,Robot obstacle avoidance;

4,Teaching apparatus;

5,Security, industrial control;

Electrical parameters:

Instructions for using:

This module will occupy one IO port in microcontroller when it's in using. After connecting with the power, the module will have a ranging every 50s, and have a frame from the pin out(having four 8-bit data)

 The  format of frame is: 0XFF + H_DATA + L_DATA + SUM.

1. 0XFF: is a beginning data,used to determine a data;

2. H_DATA: the heigt of distance data is 8 digits;

3. L_DATA: the low of distance data is 8 digits;

4. SUM: sum of data, used for validation. 0XFF+ DATA_H +DATA_L =SUM(only lower than 8 digits);

Note: DATA_H and DATA_L combine into 16 digits,the distance value in millimeters;