Getting Startted

Principle of Use

TOF is an absolute distance detection technology, that is, the sensor emits the near-infrared light to be debugged, and it will reflect when encountering an object. The sensor calculates the distance of the captured scene by calculating the time difference or phase difference between light emission and reflection to generate depth information. Compared with the binocular scheme and the 3D structured light scheme, TOF has the advantages of long working distance, wide range of application scenarios, and high accuracy at long distances. Therefore, it is often used in personnel approach detection, robot obstacle avoidance, camera autofocus and other occasions.

Overview

The module can meet the needs of various scenarios. It can output distance measurement value (dis), distance status (dis_status), signal strength (signal_strength), ranging precision (range_precision) and other information.

• Output mode: In UART mode, it supports active output and query output. In IIC mode, the host sends a read parameter frame to read slave data. Active output means that the module sends measurement data frames independently and continuously, and the sending frequency is 50Hz; query output means that the module will output one measurement data frame every time it receives one query frame.
  
• Connection method: UART, IIC and I/O output methods are supported, and the three output methods share a set of physical interfaces. Among them, UART output supports active output and query output of one single module; IIC mode supports reading and writing parameters of a single module. In I/O output mode, the ranging value cannot be output, but the complementary level can be output.

NOTE

When exceeding the measurement range of 15m, the error is larger in the range of 15m to about 20m. And the sensor outputs 0 when detecting an object out of 20m.