AECO-Fiber Optic Sensors-Cảm biến sợi quang -Nguyên lý hoạt động

FIBER OPTIC SENSORS

WORKING PRINCIPLE

Fiber optic sensors function electronically like any other photoelectric sensor with the difference that the light emitted and received is transported by an optical fiber the end of which is very small and in different forms and it can be installed some distance from the electronic circuit.

The reduced dimension of the fiber allows the sensing of very small objects and their installation in areas where other sensors would not fit.

Furthermore they can be used in explosion risk areas as well as in liquids and have a very high resistance to mechanical damage and to vibrations which makes them suitable for installation on machinery were movement is involved.

They are available in the reflection and barrier emitter/receiver. The light source is red and the length of the standard fibers is 2 metres.

TYPE OF SENSING

FT18SM-CFR WITH FIBERS FOR DIRECT REFLECTION

In this type of function the red light emitter and receiver are contained in one fiber (MULTI CORED) or side by side (DOUBLE CORED).

The sensing is obtained by the reflection of the rays of the object to be detected. The parameters that influence the sensing distance are mainly the colour, the reflective or the roughness of the surface to be sensed. The maximum sensing distances mentioned in the technical characteristics refer to results obtained with a piece of matt white paper dimension 10 x 10 cm.

FT18SM-CFR WITH BARRIER FIBERS EMITTER/RECEIVER

In this type of function the red light emitter and receiver are facing each other and are made up of a single fiber (SINGLE CORED).

Detection occurs when the rays emitted are interrupted furthermore these fibers can reach at their maximum sensitivity regulation, long distances as there is no dispersion between emitter and receiver. Their power can be increased by using the AT-4101 lenses.