Abnormal heating detection device and electric heating system
A technology of abnormal detection and electric heating, applied in electric heating devices, electric furnace heating, furnace control devices, etc., to suppress misjudgments and improve reliability
Active Publication Date: 2016-05-11
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
Method used
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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 this embodiment as an electric heating system is a system for performing heat treatment by energizing the workpiece W. ), the four electrodes 3a, 3b, 3c, and 3d connected to the heating power supply device 2, and the heating control device 4 that controls the energized heating of the workpiece W by controlling the heating power supply device 2 , and an energization spark detection device 6 that detects especially sparks among heating abnormalities that may occur when the workpiece W is energized.
[0056] The workpiece W is a conductive steel material, specifically, a bar-shaped torsion bar used in vehicles such as automobiles.
[0057] The heating power supply device 2 is a device that energizes the workpiece W accordi...
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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 priority from Japanese Invention Patent Application No. 2012-051985 filed in the Japan Patent Office on Mar. 8, 2012, the entire contents of which are hereby incorporated 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 performed normally when the heated conductive member is heated by flowing an electric current, and a heating abnormality detection device having the heating abnormality detection device. Electric heating system of the device. Background technique [0004] Generally, components such as stabilizers, torsion bars, and coil springs used in vehicles such as automobiles are heat-treated to impart desired mechanical properties during the manufacturing process. This heat treatment has been performed in a heating furnace in the past, however, heat tr...
Claims
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IPC IPC(8): H05B3/00C21D1/09C21D1/40F27D11/04F27D21/00
CPCC21D1/09C21D1/40C21D11/00F27D21/00F27D21/0014F27D99/0006F27D2019/0037
Inventor 伊藤彻
Owner CHUO SPRING