Centiflex Systems Ltd

Ultrasonic fork barrier with analogue output 0...10V
The analogue signal is a function of lateral covering
For edge control and web guidance systems
For transparent foils
For contaminated air
High accuracy and temperature stability
High detection width
Small plane change error
High sampling rate
Teach-In

Description

The new edge sensors type UPF-A TOR are based on the experience of SNT Sensortechnik AG with ultrasonic through beam sensors. New software algorhythms and a unique SONARANGE ultrasonic transducer material allow an accuracy and temperature stability so far only achieved with optical systems. The ultrasonic fork barrier is much less sensitive to dirt and dust compared to optical sensors. Further more transparent materials such as foils can be perfectly handled. The so called plane change error has been minimized to almost zero. Together with the high sampling speed of the sensor this means that fast moving and thus fluttering webs are well aligned.

Furthermore acoustically transparent materials such as textiles can be measured. The new larger fork widths are of particular interest if the material web is vertically heavily flattering or if it does not always pass at the same height.

The UPF-A is an ultrasonic through beam sensor with separated transmitter and receiver. In contrast to conventional barriers it does not offer a simple on/off output signal, but it measures the degree of covering of the ultrasonic receiver as a linear analogue output signal. If the receiver is fully covered, the output is 0V and if not covered at all 10V. With its large measuring range of 13mm it is the perfect tool for web guiding applications in dusty environment and with transparent web material. This new sensor can be used in packaging industry for web guiding control. But many other applications are open to this product, such as edge detection for many materials.

Now With Teach-In......

Data Sheet

The sensor can ideally be adjusted to the actual air conditions by the help of the teach-in function. With teach-in the output signal can be defined at fully closed as well as at fully open fork. In addition, the output signal can also be inverted via teach-in. The new sensors can be taught by push buttons using the optional teach-in box or through the connector. 3 LEDs indicate the actual position in 5 steps.

The 5 advantages of SNT ultrasonic fork sensors

1.	The SNT ultrasonic transducers have a large diameter giving large measurement range combined with high linearity and resolution.

2.	The all new SONARANGE material of the ultrasonic transducers has a Young’s modulus which is constant up to higher temperatures than previously possible resulting in high temperature stability

3.	The signals are compensated with computed data as well as with a temperature sensor giving precise operation up to 60°C.

4.	The sensors have the teach-in feature so they can be adapted to environmental condition and material.

5.	Software and transducers are designed to eliminate the influence of multiple echoes resulting in very small influence of plane change and high measuring speed.