Sensor module, sensor unit and system for recognizing surrounding objects and defining an environment

A sensor unit, comprising:

• a body having at least two surfaces, in which a first surface is mounted with a first object;
• and
• a sensor module contained in the body, wherein the sensor module comprises:
• an optical element that guides lights from the at least two surfaces, wherein one of the lights is from the first object;
• and
• an image sensor that senses the light from the first object so as to identify the first object according to an optical feature of the first object.

A system, comprising:

• a plurality of sensor units wherein each of the sensor units includes a body having at least two surfaces, and the body contains a sensor module comprising:
• an optical element that guides lights from the at least two surfaces, wherein the lights are from a first object mounted at one surface of the body and a second object mounted at another surface of the body;
• and
• an image sensor that senses the lights from the first object and the second object so as to identify the first object and the second object according to optical features obtained respectively from the first object and the second object.