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>Sensor for measures and differentiate light levels reflected from bright and dark surfaces. It is also use as the eyes of the robot, it helps in navigating, detect bright object, tell the different between coloured objects.

 

Touch Sensors

The uses of touch sensors are to detect contact between the robot and external objects surround it.

Other example of sensors [4]:

 

Ultrasonic Range Sensors

 

Infrared Sensors

 

Inertia Measurement Unit

 

Accelerometers

 

Current and Voltage Sensors

 

Temperature and Humidity Sensors

 

Camera and Vision Sensors

 

Obstacle Detectors

 

Force Sensors

 

Sound detectors and etc.

 

2.3.2.2 Hydraulic Technologies

Hydraulics is the equipment or machinery involves or is operated by a fluid that is under pressure, such as water or oil. This system used to increase the power of force to produce maximum energy required. Hydraulic systems are widely used in various industries to operate and manufacture many products. Hydraulic usually applied on machines and robotic part [5].

 

2.3.2.3 Pneumatic Technologies

Pneumatics technology is operated by air under pressure and it is powerful. Pneumatic means filled with air. It is quiet similar to hydraulic, the only different are it is operated by air, where as hydraulic is operated by liquid. Examples of pneumatic systems: Air compressor, electro-pneumatic action, tubular-pneumatic action, vacuum pump, compressed-air engine, air brakes, air engines, pneumatics launchers

 

Pneumatic robot arm operated by human. Pneumatic can have long operating lives and require very little maintenance, but it is not easily damaged by shock [6].

 

2.4 Uses of Robots in Various Fields

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