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.jpg) SICK has introduced the new OD series opto-electronic Displacement Sensors. Their particular advantage: optical and evaluation units are combined in one single housing. This means that OD sensors are in a position to detect the smallest of objects and determine their heights with extreme accuracy without any supplementary control device. Areas of application are in the electronics industry, automobile production, robotics and the construction of packaging machines.SICK has based the OD series on the one-housing concept instead of the separation of optics and evaluation that has usually been the case up to now. This new development on the market provides space-saving, simple mounting and calibration, if required, at the sensor itself – and not at a control device installed far away. Multicoloured LEDs show the device's status optically; the indicators and switches are ergonomically integrated into the control panel.
Further advantages include learning scanning distances and calibration of the analog output by teach-in; as well as digital, thus highly accurate, signal processing. OD sensors operate using the triangulation method of measurement that has proved so effective in opto-electronics. The light emitted by the laser diode is reflected by the target substance, e.g. a ceramic or silicon substrate, and displayed on a receiver array after passing through a receiver lens. The position of the light spot on the so-called PSD detector (for Position Sensitive Device) is dependent on the distance from the detected object. Processing of the signal in the OD sensor's micro-controller provides the distance from the object as a linear output signal. Here, digital signal processing provides both maximum resolution and high linearity that, in turn, lead to precise measurement results in the µ-sector, as are required in the electronics industry, e.g. for testing IC contacts or detecting artificial resin coating. |
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