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Contrinex SMART Sensors Provide a Built-In Diagnostic Solution for Cylinders
Contrinex inductive SMART sensors enable hydraulic & pneumatic cylinder & valve manufacturers an opportunity to add smart-monitoring as well as enhance their performance. These sensors combine robustness, reliability & performance with smart functionality
Contrinex SMART inductive sensors are embedded into the side wall of a pneumatic cylinder. The sensors are high-precision Digital distance-Measurement smart Sensors, also known by the acronym ‘DMS’. The sensors precisely measure the distance to a longitudinally inclined face at the end of the circumference of the cylinder’s drawbar. At the end of the cylinder’s travel, as the drawbar moves forward, the distance to the slope of the inclined faces changes in direct proportion to the position of the drawbar.
The sensor can measure a distance of up to 6mm to the inclined face with a dynamic resolution of ±5.5 micrometres, delivered in a highly accurate 16-bit digital output to the PLC. This is used to determine the cylinder drawbar’s precise lateral position in real time.
A velocity gradient profile for the cylinder at the end or start of travel can be created using the sensor’s onboard cumulative data store. The PLC can also initially calibrate the two extremes of the cylinder’s travel and record these in the sensor’s local data store. The sensors can then monitor the drawbar in real-time to ensure that it does not exceed the defined extreme of travel and that any non-compliant velocities, acceleration, deceleration or positioning are sent as an alarm to the PLC.
The sensor’s dual-channel capability is utilised to provide secondary monitoring of the cylinder’s temperature. If an over-temperature event is detected, a high-speed serial input/output (SIO) alarm is sent to the PLC, calling for action before there is a risk of wear or damage.
The small and compact size of the sensors makes them ideal for fitting into cylinders, valves or manifolds. Their proven technology, exceptional resistance to extreme vibration during operation as well as best-in-class long-sensing distances ensure highly reliable fit-and-forget operation with no manual intervention.
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