Glossary


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1) Active face

The surface of an inductive proximity sensor where a high frequency electromagnetic field emerges, although there is no direct magnetic field occurring.

2) Collision prevention

The use of sensors to detect the presence of objects and, through the use of integrated controls, prevent a collision between two objects from occurring.

3) Convergent beam

Another name for fixed focus sensing where the photoelectric sensor will only detect objects at a fixed distance from the sensor.

4) Data transmission

The use of sensors to transmit data via pulse-modulated light beam systems typically from host stations to mobile carriers such as AGV's or stacker cranes.

5) Deadband

An unusable area extending from the face of an ultrasonic proximity sensor to the minimum sensing distance allowing for target detection where pulses are received too quickly to be accurately evaluated.

6) Echo

The time elapsed between pulse emission and reception that is used to determine target position in an ultrasonic proximity sensor.

7) Excess gain

The point at which just enough light intensity is present to trigger a photoelectric sensor given the usable area of the lens,  For example, an excess gain of two would mean that just enough light intensity is present to trigger a sensor with 50% of the lens obscured with contaminants.

8) First surface protection

The ability of polarized retro-reflective photoelectric sensors to eliminate false operation as a result of shiny objects.

9) Hysteresis

The ratio of the distance the object travels between the points at which the sensor is turned on and off to the distance the object is from the sensor.

10) Lot reconciliation

The use of sensors to count the number of objects that pass a particular point in the material handling system for purposes of reconciling actual production or material movement with planned production.

11) Masked out

The design of an inductive loop sensor so that certain objects are not detected.

12) Package detection

The use of sensors to identify the presence of an object typically to actuate another device for the process of identification, sorting, sizing, etc.

13) Photoelectric

A form of sensor that uses light to detect the presence or absence of a physical object.  See also Sensor .

14) Positioning

The use of sensor arrays to detect the position of an object in the material handling system typically for the purpose of applying a bar code or other identifier to the object.

15) Quality control

The use of sensors to detect the presence of an object's component part, fill level, or dimensional tolerance for the purposes of providing process quality control.