POSITION DETECTOR

• Main Authors: KUSUMI MASAAKI, TAKEI YUSUKE, ISHIMOTO SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 24.12.2015
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

PROBLEM TO BE SOLVED: To perform high-accuracy position detection using a magnetoresistance effect element such as TMR element.SOLUTION: A position detector comprises at least two magnetic detection elements 21-1, 21-2 that detect a magnetic leakage from a scale 11 on which a magnetic signal is magnetically recorded and output a recording signal of a position where the magnetic leakage is detected. The at least two magnetic detection elements 21-1, 21-2 are arranged in a direction y orthogonal to a direction x in which the scale 11 is scanned, and are arranged in positions substantially equally distanced from a magnetic signal recording surface of the scale 11. 【課題】ＴＭＲ素子のような磁気抵抗効果素子を使用して、精度の高い位置検出を行う。【解決手段】磁気信号が磁気記録されたスケール１１からの漏洩磁気を検出し、漏洩磁気を検出した位置の記録信号を出力する、少なくとも２個の磁気検出素子２１−１，２１−２を備える。少なくとも２個の磁気検出素子２１−１，２１−２は、スケール１１を走査する方向ｘと直交した方向ｙに並べて配置されると共に、スケール１１の磁気信号記録面からの距離がほぼ等しい位置に配置される。【選択図】図２