INERTIAL FORCE SENSOR AND PORTABLE TERMINAL USING THE SAME

• Main Authors: TSUKIO YASUNOBU, UEMURA TAKESHI, HATTORI ISAO, OUCHI SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2017
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

PROBLEM TO BE SOLVED: To provide a sensor with which it is possible to allow an inertial force sensor to autonomously transition to a power-saving mode and restore to a normal power mode without requiring a restore operation by a user or an external circuit.SOLUTION: An inertial force sensor of the present invention comprises: an acceleration sensor element for converting acceleration into an electric signal; an acceleration signal processing unit for outputting an acceleration signal and connected to the acceleration sensor element; and a power control unit connected to the acceleration signal processing unit. The power control unit outputs a first control signal for transitioning to a power-saving mode when a state in which the acceleration signal resides inside a prescribed range continues for the duration of a first period, and outputs a second control signal for transitioning to a normal power mode when a state in which the acceleration signal resides outside of the prescribed range continues for the duration of a second period smaller than the first period.SELECTED DRAWING: Figure 4 【課題】ユーザーや外部回路による復元操作を要することなく、慣性力センサが自律して省電力モードへの移行と通常電力モードへの復元を行うことができるセンサを提供する。【解決手段】加速度を電気信号に変換する加速度センサ素子と、前記加速度センサ素子に接続されて加速度信号を出力する加速度信号処理部と、前記第加速度信号処理部に接続された電力制御部と、を備える。前記電力制御部は、前記加速度信号が所定範囲の内側にある状態が第１期間継続した場合、省電力モードに移行するための第１制御信号を出力し、前記加速度信号が前記所定範囲の外側にある状態が前記第１期間より小さい第２期間継続した場合、通常電力モードに移行するための第２制御信号を出力するよう動作できる慣性力センサ。【選択図】図４