Heating abnormality detection device and electrical heating system
An anomaly detection and electric heating technology, which is applied in the direction of electric heating devices, electric furnace heating, furnace control devices, etc., to achieve the effect of suppressing misjudgment and improving reliability
Active Publication Date: 2014-11-19
CHUO SPRING
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Problems solved by technology
And, when the above-mentioned abnormality of sparks or overheating occurs, it may cause some bad conditions in the workpiece due to these reasons
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[0053] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0054] (1) The overall composition of the electric heating system
[0055] Such as figure 1 As shown, the energization heating system 1 of the present embodiment as an electric heating system is a system that performs heat treatment by energizing the workpiece W. The energization heating system 1 has the function of heating the workpiece W by flowing an electric current to the workpiece W (electric heating The heating power supply device 2 of ), the four electrodes 3a, 3b, 3c, and 3d connected to the heating power supply device 2 control the heating control device 4 for controlling the energization and heating of the workpiece W by controlling the heating power supply device 2 , And the energization spark detection device 6 that detects, among the heating abnormalities that may occur when the workpiece W is energized and heated, especially sparks.
[0056] The work...
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The invention is a heating abnormality detection device. Said heating abnormality detection device is provided with: at least one photometric detection section that detects the luminosity of the periphery of a heated member; a background luminosity setting section that for each photometric detection section, sets the luminosity detected by the relevant photometric detection section before an electrical heating section has started heating, said luminosity being set as a background luminosity; and a heating abnormality assessment section. After the electrical heating section has started heating, for each photometric detection section, said heating abnormality assessment section performs a luminosity comparison that determines whether or not a difference is larger than a specified luminosity increase threshold value, said difference being the difference between a heating-time luminosity and the background luminosity, said heating-time luminosity being a luminosity detected by the photometric detection section after the start of the heating, said background luminosity having been set by the background luminosity setting section. If in at least one photometric detection section, a luminosity excess state exists in which the aforementioned difference is greater than the luminosity increase threshold, said heating abnormality assessment section assesses that a heating abnormality has occurred.
Description
[0001] Cross references to related applications [0002] This international application claims the priority of Japanese invention patent application No. 2012-051985 filed at the Japan Patent Office on March 8, 2012, and the entire content of the Japanese invention patent application is incorporated herein by reference. Technical field [0003] The present invention relates to a heating abnormality detection device for detecting a heating abnormality in which the heating is not normally performed when the heated member is heated by flowing an electric current to the conductive heated member, and has the heating abnormality detection device The electric heating system of the device. Background technique [0004] Generally, components such as stabilizers, torsion bars, and coil springs used in automobiles and other vehicles undergo heat treatment in order to give them desired mechanical properties during the manufacturing process. This heat treatment has been performed in a heating fu...
Claims
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IPC IPC(8): H05B3/00C21D1/09C21D1/40F27D11/04F27D21/00
CPCF27D21/0014C21D1/40F27D21/00F27D2019/0037F27D11/04C21D11/00F27D99/0006C21D1/09
Inventor 伊藤彻
Owner CHUO SPRING