Omron Corporation

Hajime Tsubata

Keisuke Yano

Takaaki Yamada

Takeshi Wakabayashi

Hiroyuki Togawa

Ryosuke Hasui

Hitoshi Tanaka

A heating device () comprises: a heater () for heating an item (); a temperature detection unit () for detecting the temperature of the item (); and a temperature adjustment unit () for controlling the heater () on the basis of a target temperature and the detected value of the temperature detection unit () so that the temperature of the item () reaches the target temperature. The heating device () determines, as a system gain change rate, the rate of change from the initial value of a system gain determined as a ratio of a temperature increase value of the item () with respect to electric power inputted to the heater (), and determines the rate of change in the heat retention of the item () using the system gain change rate.

Heating device and method for detecting failure of heating device

This heating device () includes: a heater () for heating an object () to be heated; a temperature detection unit () for detecting a temperature of the object () to be heated; and a temperature regulator () which controls the heater () so as to make the temperature of the object () to be heated equal to the target temperature. The temperature detection unit () comprises temperature sensors (). An identification unit () identifies, from temperature data detected by the temperature sensors () and manipulation quantity data corresponding to electric power applied to the heater (), a heat transfer function between the heater () and the temperature sensors (), and a heat transfer function between the respective temperature sensors (). A determination unit () detects a change of the transfer functions, and determines an abnormality in the heater () or the temperature sensors ().

Heating device

A technique capable of shortening a period in which value of a PID parameter is outside of an appropriate range is provided. A measured value acquisition functional unit processes a sensing signal of a sensor that measures a barrel and acquires a measured value of the barrel. A storage unit stores a target value of the barrel and a PID parameter. An operation amount calculation functional unit calculates an amount of operation using the PID parameter and a difference between the measured value and the target value. A first output unit and a second output unit output the amount of operation. A first updating functional unit updates the PID parameter through a first update process when the variation range is greater than a first range, and a second updating functional unit updates the PID parameter through a second update process when the variation range is less than a second range.

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Kusatsu, Japan

Hajime Tsubata