3D sensor solution 3D Profile Unit
Capacitive displacement measurement system with miniature controller
The non-contact, capacitive miniature displacement measurement system has been specially developed for applications requiring integration into machines and systems. The small design and economical prices are intended for OEM applications. All electrically conducting materials can be used as targets.
The capacitive measurement principle ensures high accuracy and stability of the measurement results. Typical applications are found in positioning tasks, wear measurement, the measurement of gaps, offsets, roundness and many other features.
The method of capacitive displacement measurement is based on the principle of the ideal plate-type capacitor. A change in the spacing of the plates causes a change in the total capacity. With a sensor system the two plate electrodes are formed by the sensor and the measurement object. Through a special evaluation of the reactance of the plate capacitor, a strictly proportional relationship is obtained without additional linearization. In practice this linearity is almost ideally realized by tri-electrode technology in the sensors. With this guard-ring technology a homogeneous measuring field is produced, ensuring the highest signal stability. This applies for all metals as the target irrespective of the conductivity.
The extensive sensor series starts at a measurement range of 0.2 mm and with the larger models covers displacements up to 10 mm. In conjunction with the miniature controller resolutions in the submicrometer range and bandwidths of up to 500 Hz are achieved. The electronics unit is characterized by very low current consumption and counts amongst the smallest capacitive controllers on the market.
The capacitive measuring principle specially developed by Micro-Epsilon facilitates a fast change of sensors in just a few seconds. The simple change of sensors of the same type and the interchange of different capaNCDT controllers is easily carried out without calibration, whereas conventional systems must in this respect be subjected to complicated calibration and linearization.
The capacitive measurement principle ensures high accuracy and stability of the measurement results. Typical applications are found in positioning tasks, wear measurement, the measurement of gaps, offsets, roundness and many other features.
The method of capacitive displacement measurement is based on the principle of the ideal plate-type capacitor. A change in the spacing of the plates causes a change in the total capacity. With a sensor system the two plate electrodes are formed by the sensor and the measurement object. Through a special evaluation of the reactance of the plate capacitor, a strictly proportional relationship is obtained without additional linearization. In practice this linearity is almost ideally realized by tri-electrode technology in the sensors. With this guard-ring technology a homogeneous measuring field is produced, ensuring the highest signal stability. This applies for all metals as the target irrespective of the conductivity.
The extensive sensor series starts at a measurement range of 0.2 mm and with the larger models covers displacements up to 10 mm. In conjunction with the miniature controller resolutions in the submicrometer range and bandwidths of up to 500 Hz are achieved. The electronics unit is characterized by very low current consumption and counts amongst the smallest capacitive controllers on the market.
The capacitive measuring principle specially developed by Micro-Epsilon facilitates a fast change of sensors in just a few seconds. The simple change of sensors of the same type and the interchange of different capaNCDT controllers is easily carried out without calibration, whereas conventional systems must in this respect be subjected to complicated calibration and linearization.
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