| 摘要 |
A temperature measurement and control device for rotating heated rolls, such as those used in the fiber processing industry. The temperature sensor is stationarily mounted and positioned in a slot at one end of a rotating roll, and the sensor is used for controlling power to a heater utilized with the roll. The sensor thus is used to control the temperature of the roll surface. At high roll speeds the thermal coupling between the sensor and the roll is adequate, but at lower speeds that are encountered during the slowing down and stopping of the rolls, the thermal coupling between the roll surfaces and the sensor reduces in efficiency and the sensor conducts a large proportion of heat to its mounting structure. The present device utilizes passing a current through the sensor to self-heat the sensor to compensate for this decrease in thermal coupling and resultant stem conduction error.
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