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EGE UBD Series Band-edge Detector Opto Sensor

UBD light barriers feature a closed light beam which is set up between the sensor and machine. The sensor switches when an object interrupts the light beam. The only requirement is the presence of a defined background, e.g. a machine part, within the sensing range of the sensor, which closes the light beam.

System Description

The Opto Edge controller consists of an amplifier to which two fibre-optic cables of up to 10 m in length can be connected via a rapid action coupling. The first fibre-optic cable routes a send signal generated by the amplifier to a first optical converter (UBD Series Band-edge Detector) , while the second fibre-optic cable returns a send signal detected by a second optical converter to the amplifier as a receiving signalUL. This receiving signal is processed further in the amplifier into an output control signal.

The Opto Edge controller works with infra-red light which issues extremely short and fast impulse sequences which enable reliable recording of rapidly occurring processes, even in the presence of influences from external rays.The process control system which is determined by the user, as well as the design of the optical converter, demands a high degree of flexibility from the system.

Structure of the opto edge controller

In the system structure illustrated on Fig.1 (please check the catalogue) the optical converters (3, 4) are configured in opposing positions to form a photoelectric barrier (UBD Series Band-edge Detector). The material which, for example, may be paper or a metal edge, pushes into the light ray and, depending on the depth of insertion, reduces the ray path of the light flow detected by the converter. The amplifier which is connected by means of the fibre-optic cable supplies a control signal (4…20 mA) to its output which is proportional to the insertion depth of the material depending on the formation of the optical converters (3,4) with a repeating accuracy of up to +/- 0.5 mm.

Opportunities for adjustment are provided on the amplifier which ensure the exact adaptation of the fibre-optic cable types, optical converters or output signals, such as to discriminate digital switching or analog recording. A particular advantage of the system is that the fibre-optic cable and the optical converter for transmitting and receiving are identical and, thereby, interchangeable. As a result, modification of the recording arrangement is reduced to purely construction measures. The photoelectric barrier process can be changed to a reflex process by a simple modification. In the reflex process illustrated in Fig. 3 (please check the catalogue) the optical converters for the send and receive signals are arranged next to each other, e.g. above the material. With this arrangement the material does not interrupt the ray path between the sender and the receiver, but rather reflects a residual ray flow, which is detected by the receiver. The output corresponds to the distance of the materials. In this arrangement the result is also a current signal from the amplifier which is proportional to the insertion depth of the material with high repeating accuracy.
In the case of the reflex process, however, accompanying conditions which are included in the measurement result have to be taken into account. In particular these include the reflection factor of the material or the reflection due to the background which is not covered by the material. Influences of this type have to be taken into account during installation.

Features

  • Light Barrier Technology
  • Up to 100 mm sensing range
  • Up to 200 mm fork Width

Applications

UBD light barriers feature a closed light beam which is set up between the sensor and machine. The sensor switches when an object interrupts the light beam. The only requirement is the presence of a defined background, e.g. a machine part, within the sensing range of the sensor, which closes the light beam.

Specifications

Design Light barrier fork
Dimesion EGE-UBD-Series-Band-edge-Detector-Opto-Sensor-Dimension.jpg
Recording breadth B 50 mm 50 mm 100 mm 100 mm
ID-No. P51025 P51026 P51027 P51028
Type UBD 50-100 UBD 50-200 UBD 100-100 UBD 100-200
Fork width A 100 mm 200 mm 100 mm 200 mm
Mounting breadth M 60 mm 160 mm 60 mm 160 mm
Fork size L x H 250 x 200 mm 250 x 300 mm 250 x 200 mm 250 x 300 mm
Length of light cable 200 cm
Temperature range – 25…+200 °C
Detection tolerance 1 mm
Protection IP 54 EN 60529
Material converter aIuminium
Material cable stainless steel
Note required amplifier series URA…

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EGE Opto Sensors

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