ABNORMALITY DETECTION SYSTEM FOR DIFFERENTIAL TRANSFORMER DISPLACEMENT METER, DIFFERENTIAL TRANSFORMER DISPLACEMENT METER, AND ABNORMALITY DETECTION METHOD

• Main Authors: IRIE SHIGEAKI, MATSUMURA KAZUSHI, AIBA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TESTING; TRANSFORMERS

To provide an abnormality detection system for a differential transformer displacement meter that can detect abnormalities with higher accuracy, a differential transformer displacement meter, and an abnormality detection method.SOLUTION: An abnormality detection system for a differential transformer displacement meter 22 in which the output voltage output from a secondary winding 25 changes in accordance with the AC input voltage depending on the position of a movable iron core 26 includes an acquisition unit that acquires the voltage value of the output voltage at the timing of a predetermined phase of the input voltage, and a determination unit that performs an abnormality determination on the basis of a voltage difference between a voltage value obtained corresponding to a target period and a voltage value acquired corresponding to a period before the target period.SELECTED DRAWING: Figure 4 【課題】より高精度に異常を検出すことのできる差動トランス式変位計の異常検知システム、差動トランス式変位計、及び異常検知方法を提供する。【解決手段】可動鉄心２６の位置によって、交流の入力電圧に対応して２次巻線２５から出力される出力電圧が変化する差動トランス式変位計２２の異常検知システムであって、入力電圧の所定位相のタイミングにおける出力電圧の電圧値を取得する取得部と、対象周期に対応して取得された電圧値と、対象周期より前の周期に対応して取得された電圧値との電圧差に基づいて異常判定を行う判定部と、を備える。【選択図】図４