CIRCUIT ARRANGEMENT FOR THE METROLOGICAL DETERMINATION OF DIAMETERS OF METAL BODIES

摘要

The invention concerns a circuit arrangement for the metrological determination of diameters of metal bodies, in particular of wires, the circuit arrangement comprising a first device which generates a sensor signal and an oscillator which delivers electrical signals at a predetermined frequency to the first device. According to the invention, in order to enable variations in diameter to be measured reliably and stably in a simple manner, the circuit arrangement comprises a second device which generates a reference signal as a function of the ambient temperature and/or ambient air humidity, and a third device which associates the sensor signal with the reference signal and generates an output signal which is representative of a variation in the diameter of the metal body. The first and second devices are mutually associated such that both devices are exposed to the same ambient temperature and/or the same ambient air humidity, such that, when the output signal is formed, the influence of the ambient temperature and/or ambient air humidity is compensated.