APPARATUS FOR CONTACTLESS MEASUREMENT OF TEMPERATURE

摘要

APPLICANTS AND INVENTORS: REINE LINDWALL and LEIF SAMUELSSON TITLE OF INVENTION: APPARATUS FOR CONTACTLESS MEASUREMENT OF TEMPERATURE The invention relates to a measuring apparatus for measuring the temperature of an elongated movable object such as a wire or wire-rod exiting from a draw plate during a wire drawing process. The wire is located in a columnlike chamber which is defined by two vertical walls and through which an upwardly moving flow of gas passes. A temperature sensor is mounted above and beneath the wire and the temperature difference in the gas is determined with the aid of a differential amplifier. The sensors may be thermistors or preferably thermocouples, which in the latter case are coupled with counteracting thermo-voltages for direct compensation and an output voltage proportional to the temperature difference.