Menetelmä ja laite mittaussignaalin siirtämiseksi pyörivältä telalta tai vastaavalta kiinteille vastaanottolaitteille

摘要

The invention concerns a method and a device for the transmission of an analogue measurement signal from a rotating roller 10 or the like to stationary reception devices 30 outside this without the use of cables. In the method and in the device a measurement sensor or a series 201 . 20n of measurement sensors are used, from which the signal or signal series is connected to transmission devices 17. These transmit a measurement signal or signal series to reception devices 30 from which an analogue signal Vout or corresponding signal series Vout 1 . Vout n is obtained, which is proportional to the output message of the sensor or the sensor series 201 . 20n. The analogue measurement signal Vin or signal series Vin 1 . Vin n which is obtained from the sensor 20 or the sensor series 201 . 20n is taken to a voltage-frequency inverting unit 16. An optical light transmitter 17 or a series 171 . 17p of optical light transmitters is controlled by the frequency-modulated output of the abovementioned inverting unit 16. A light beam K or light beams K1 . Kp from the transmitters 17 are received by a light detector 32. The signal from the light detector 32 is taken to a frequency-voltage inverter unit 34 where the output signal Vout or the output signal series Vout 1 . Vout n which is obtained from the unit is proportional to the sensor's measurement signal Vin or series Vout 1 . Vout n of measurement signals.