Alps Alpine Co., Ltd.

Alps Electric Co., Ltd.

Ikuyasu Miyako

Toshio Ogawa

Satoshi Hayasaka

Shigeru Furuki

Wataru Kimura

Tsutomu Abe

Ryo Maeda

Takashi Uenomachi

Yoshitsugu Wakita

Shinya Muto

Shinichi Sagawai

Akihiro Takahashi

A rotation angle detecting method includes measuring a current flowing through a motor, and obtaining a rotation angle of the motor based on a value of the measured current. The obtaining of the rotation angle of the motor includes obtaining the rotation angle in an inertial rotation of the motor based on a rotational angular velocity of the motor immediately before a first time point, a time period from the first time point to a second time point, and a time period from the second time point to a third time point. The first time point is a time point at which driving of the motor is stopped, the second time point is a time point at which a polarity of the value of the measured current is inverted, and the third time point is a time point at which the value of the measured current becomes zero.

Rotation angle detecting method, recording medium storing rotation angle detecting program, and rotation angle detecting device

A rotation angle detection device includes a current meter that measures a current flowing in a direct current motor; a filter that extracts a ripple component from the current; a ripple detector that detects a ripple from a signal that has passed through the filter; and a rotation angle detector that detects a rotation angle of the direct current motor based on the number of ripples. The rotation angle detector measures an observation period based on consecutive ripples, calculates an estimation period between the consecutive ripples based on the observation period, determines whether the observation period is within a normal range based on the estimation period and the observation period, and in response to determining that the observation period is within the normal range and an immediately-previous observation period is outside the normal range, calculates a number of correction ripples CRN so as to correct the number of the ripples.

Rotation angle detection device and rotation angle detection method

A motor module includes a motor and a rotation angle detector including a rotation angle calculator that calculates a rotation angle based on a voltage and an electric current of the motor, a first signal generator that generates a first signal based on a ripple component included in the electric current, an operation part that corrects the rotation angle based on the first signal and the rotation angle, and a rotation information calculator that calculates information on rotation of the motor based on an output from the operation part. The operation part outputs, to the rotation angle calculator, a command to correct the rotation angle when the first signal is generated for the first time while the rotation angle is within a predetermined angle range, and ignores the first signal that is generated for the second or subsequent time while the rotation angle is within the predetermined angle range.

Motor module, rotation angle detector, and method for detecting rotation angle of motor

A motor module includes a motor including a commutator, and an apparatus that is attached to the motor and obtains information on rotation of the motor. The apparatus includes a rotation angle calculator that calculates a rotation angle of the motor based on a voltage between terminals of the motor and an electric current flowing through the motor, a first signal generator that generates a first signal based on a ripple component included in the electric current flowing through the motor, a second signal generator that generates a second signal indicating that the motor has rotated by a predetermined angle based on the first signal and the rotation angle, and a rotation information calculator that calculates the information on the rotation of the motor based on an output from the second signal generator.

Apparatus and method for obtaining information on rotation of DC commutator motor

A rotation angle detector includes a rotational angular velocity calculator that calculates a rotational angular velocity of a motor based on an inter-terminal voltage of the motor detected by a voltage detector and a current flowing through the motor and detected by a current detector; a ripple detector that detects a ripple component included in the current; and a failure detector that detects a failure of any one of the voltage detector, the current detector, and the ripple detector based on outputs from the detectors. The failure detector determines that the failure has occurred when a state, where the outputs from two of the voltage detector, the current detector, and the ripple detector indicate normal rotation and the output from the remaining one of the voltage detector, the current detector, and the ripple detector does not indicate normal rotation, continues for a predetermined period of time.

Motor module, rotation angle detector, and method for detecting failure of rotation angle detector

An input device includes a base member, a motor, a rotation shaft, a worm gear, a first gear, a second gear, an elastic member, a rotor, an angle detection unit, and a controller. The rotation shaft is rotated by the motor. The worm gear is unitarily rotated with the rotation shaft. The first gear is rotatable and engaged with the worm gear. The second gear is coaxial with the first gear. The elastic member generates urging force. The rotor is rotatable relative to the base member, includes a third gear engaged with the second gear, and is rotated by an operator. The angle detection unit detects a first rotation angle of the first gear and a second rotation angle of the second gear. The controller performs drive control for the motor to change a sense of force applied to the operator.

Input device

An input device includes a base member, a motor, a rotation shaft, a worm gear, a first gear, a rotor, a movement member, an elastic member, a change amount detection unit, and a controller. The rotation shaft is rotated by the motor. The worm gear is rotated by the rotation shaft. The first gear is rotatable and engaged with the worm gear. The rotor is rotatable relative to the base member, includes a second gear engaged with the first gear, and is rotated by an operator. The movement member is moved as the worm gear is moved. The elastic member generates urging force. The change amount detection unit detects a change amount of a state that is changed in accordance with the movement of the movement member. The controller performs drive control for the motor to change a sense of force applied to the operator.

When a rotation start position of a rotation shaftis a middle start position(i.e., when rotation of the rotation shaftis stopped in the middle and the rotation is restarted), target rotational speed (relative target rotational speed) is defined using a relative patternthat uses the middle start positionas a reference, without using an absolute patternthat is defined using a normal rotation start positionas a reference. Upon detecting that a condition that absolute target rotational speed corresponding to an angular position detected by a rotation sensoris greater than the relative target rotational speed is not satisfied, motor control is switched so that the absolute patternis used.

Electromechanical device provided with controlled motor and rotation control method

An input device includes an input unit on which an operator performs a predetermined operation to perform input, a storage unit that stores a reference range set on a virtual coordinate, a control unit that identifies the operation of the operator based on a trajectory of the operation performed on the input unit by the operator and the reference range, a determination unit that determines whether the trajectory of the operation of the operator exceeds the reference range, and a range setting unit that updates the reference range based on a determination result of the determination unit.

Input device and operation device for vehicle

A driving signal is applied to a plurality of driving electrodes using the driving matrix illustrated in FIG.A obtained by removing a row in which a sum of codes is greatest and a column having a transposition relationship with the row in a Hadamard matrix. Distribution of capacitance in intersection portions between a sensing electrode and a plurality of driving electrodes can be obtained using an inverse matrix of the driving matrix illustrated in FIG.B. Further, when decoding is performed using an extended matrix obtained by replacing '0' with '&#x2212;1' in FIG.B, it is possible to average noise and to improve an S/N ratio.

Capacitive sensing device

A distance vector from the original cursor position where the cursor exists before the manipulation to the cursor movement destination position is set to a movement direction distance vector, distance vectors from the original cursor position to each button position of a plurality of buttons are set to button distance vectors, and the button having the shortest movement time is determined as a target button intended by a user by computing the movement time to a plurality of buttons using the movement direction distance vector and a plurality of button distance vectors, so that the display control of the display unit is performed such that the cursor is dragged into the target button.

Haptic input device

An operation feeling giving input device includes an operation member that is displaced to an arbitrary operational position according to the operation of an operator, actuators that change the operational position of the operation member separately from the operation of the operator by applying an operational force to the operation member, operational position detecting means that detects the operational position of the operation member, storage means that stores information about display areas of buttons displayed on a predetermined display screen, and control means. The control means outputs a control signal for displaying a pointer on a display screen at an indicated position corresponding to the operational position of the operation member on the basis of the operational position of the operation member, and drives the actuators so that the operational position of the operation member is changed to generate a lead-in force that moves the pointer toward the inside of the buttons displayed on the display screen. If the length of a display area of the button in a vertical direction is different from the length of the display area of the button in a horizontal direction, the control means calculates the magnitude of the lead-in force on the basis of a relative relationship between the indicated position of the pointer and any one of vertical and horizontal virtual central axes extending in the longitudinal direction through a central position of the display area.

Growing community of inventors

Miyagi-ken, Japan

Ikuyasu Miyako