This type of sensor is capable of pointing out the availability of a component. Generally,
theproximity sensor will be placed in the robot moving part such as end effector. This sensor will be turned ON at a specified distance, which will be measured by means of feet or millimeters. It is also used to find the presence of a human being in the work volume so that the accidents can be reduced.
Range Sensor is implemented in the end effector of a robot to calculate the distance between the sensor and a work part. The values for the distance can be given by the workers on visual data. It can evaluate the size of images and analysis of common objects. The range is measured using the Sonar receivers & transmitters or two TV cameras.
A sensing device that specifies the contact between an object, and sensor is considered as theTactile Sensor. This sensor can be sorted into two key types namely:
· Touch Sensor, and
· Force Sensor.
The touch sensor has got the ability to sense and detect the touching of a sensor and object. Some of the commonly used simple devices as touch sensors are micro – switches, limit switches, etc. If the end effector gets some contact with any solid part, then this sensor will be handy one to stop the movement of the robot. In addition, it can be used as an inspection device, which has a probe to measure the size of a component.
The force sensor is included for calculating the forces of several
functions like the machine loading & unloading, material handling, and so
on that are performed by a robot. This sensor will also be a better one in the
assembly process for checking the problems. There are several techniques used
in this sensor like Joint Sensing, Robot –Wrist Force Sensing, and Tactile