MAGNETIC FIELD STRENGTH MEASURING DEVICE

To provide a magnetic field strength measuring device capable of measuring a magnetic field of a cap seal high frequency induction heating device using a real container.SOLUTION: A magnetic field strength measuring device 10 measures a magnetic field strength of a high frequency induction heating device that generates an induction current while applying a high frequency magnetic field to a cap of a container 1 to melt an adhesive agent to perform sealing, and includes: a casing 12 which is insertable or detachable from an upper surface opening of the container 1 to an inside and has a flange 14a whose diameter is larger than that of the upper surface opening; an amplitude detecting circuit 30 in which a detecting coil 22 for measuring an induced current generated when the cap is sealed is provided at the flange 14a and which converts a measured value of the detecting coil 22; and a detection unit 20 which has a hold amplifier 32 for storing the maximum value of the amplitude detection circuit 30, wherein the detection unit is provided in the casing 12.SELECTED DRAWING: Figure 1 【課題】実容器を用いてキャップシール用高周波誘導加熱装置の磁界測定が行える磁界強度測定装置を提供することにある。【解決手段】本発明の磁界強度測定装置１０は、容器１のキャップに高周波磁界をかけながら誘導電流を発生させて接着剤を溶融させてシールする高周波誘導加熱装置の磁界強度を測定する磁界強度測定装置１０において、前記容器１の上面開口から内部への挿入又は取り外し可能とし、前記上面開口よりも拡径したツバ１４ａを有するケーシング１２と、前記キャップのシール時に発生する誘導電流を測定する検出コイル２２を前記ツバ１４ａに設け、前記検出コイル２２の測定値を換算する振幅検波回路３０と、前記振幅検波回路３０の最大値を記憶するホールドアンプ３２を有する検出部２０を有し、前記検出部を前記ケーシング１２内に備えたことを特徴としている。【選択図】 図１