Position detection device

• Main Authors: TOSHIAKI SEIMA, YUTAKA KAMOGI, KOSUGI TATSUHIKO
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2020
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

The invention provides a position detection device which is simple in structure and high in precision. An encoder (1) is provided with a rotation detection unit (11), a reference position detection unit (12), an output unit (15), and a storage unit (18). A rotation detection unit (11) outputs a periodic rotation detection signal (S1) having a first resolution (Ri) on the basis of the rotational position of a rotor (81). The reference position detection unit (12) detects whether or not the rotational position of the rotor (81) is a prescribed reference position. A storage unit (18) stores preset correction information (19) corresponding to the rotation detection signal (S1). The output unit (15) outputs a periodic output signal (S2) having a second resolution (Rt) lower than the first resolution (Ri) on the basis of the rotation detection signal (S1) output from the rotation detection unit (11), the detection result of the reference position detection unit (12), and the correction information (19) stored in th