Abstract: A picking device includes: a workpiece holder in which a plurality of workpieces is stacked; a light receiver that receives reflected light from a workpiece stacked in the workpiece holder; a mover that relatively moves the light receiver with respect to the workpiece in such a manner that a distance between the light receiver and the workpiece is adjustable; an arm that picks the workpiece; a first hardware processor that calculates a distance between the light receiver and at least one workpiece among the plurality of workpieces; a second hardware processor that specifies a workpiece as a picking target among the plurality of workpieces or a region where the workpiece exists; and a third hardware processor that adjusts a distance between the light receiver and the workpiece calculated by the first hardware processor by controlling the mover in the region specified by the second hardware processor.

Abstract: A three-dimensional shape measuring method includes: a first step to: project first and second projection images on a target object, wherein the first projection images include row-direction stripe patterns different from each other, and the second projection images include column-direction stripe patterns different from each other, and obtain first and second captured images of the target object, wherein the first captured images are captured while the first projection images are projected, and the second captured images are captured while the second projection images are projected; a second step to identify a corresponding projection pixel of the first and second projection images, wherein the corresponding projection pixel corresponds to each of captured pixels of the first and second captured images; and a third step to identify a 3D shape of the target object based on a result of the second step.

Abstract: An object is captured in an image taken by the camera. An external shape of the object is recognized from the image. An internal shape of the object is recognized from the image. Parts information of the object is then determined, using a result of the recognition of the external shape and/or a result of recognition of the internal shape.

Abstract: There is provided a screw tightening apparatus that fastens, with a screw, two objects to be fastened including a first member provided with a first screw hole and a second member provided with a second screw hole for screwing, and the screw tightening apparatus includes: a distance measuring device that measures a relative position between the first member and the second member in a vertical direction perpendicular to the axial direction of the second screw hole; a screw tightening part that holds the screw inserted into the first screw hole and screws the screw into the second screw hole for screwing; a moving mechanism that moves the screw tightening part along the vertical direction; and a hardware processor that controls the screw tightening part and the moving mechanism according to a measured value of the distance measuring device.

Abstract: A motor controller estimates an initial position of a magnetic pole of a rotor of a brushless DC motor in an inductive sensing scheme. The motor controller controls a drive circuit to apply an AC voltage to a stator winding at a first energization angle, and subsequently to apply an AC voltage to the stator winding at a second energization angle before a residual current flowing through the stator winding returns to zero. At each energization angle, the motor controller corrects a peak value of a current in the stator winding based on the residual current detected immediately before a voltage is applied to the stator winding or at a time when voltage application to the stator winding is started. Based on the corrected peak value, the control circuit estimates the initial position of the magnetic pole of the rotor.

Abstract: A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L?5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2?i?L) and an i?1st time is 180?360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180?360/L degrees or more and 180+360/L degrees or less.

Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.

Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.

Abstract: There is provided a screw tightening apparatus that fastens, with a screw, two objects to be fastened including a first member provided with a first screw hole and a second member provided with a second screw hole for screwing, and the screw tightening apparatus includes: a distance measuring device that measures a relative position between the first member and the second member in a vertical direction perpendicular to the axial direction of the second screw hole; a screw tightening part that holds the screw inserted into the first screw hole and screws the screw into the second screw hole for screwing; a moving mechanism that moves the screw tightening part along the vertical direction; and a hardware processor that controls the screw tightening part and the moving mechanism according to a measured value of the distance measuring device.

Abstract: In a motor control device, when estimating an initial position of a magnetic pole of a rotor of a motor, a drive circuit continuously or intermittently applies a voltage to a stator winding at each of a plurality of energization angles while sequentially changing the energization angles, and at a voltage value and for an energization time period, the voltage value and the energization time period being set such that the rotor does not rotate. An initial position estimation unit calculates an estimated initial position of the magnetic pole of the rotor based on a phase angle of a trigonometric function curve that approximates a change of a ?-axis current I? with respect to each of the energization angles. The trigonometric function curve has a cycle equal to one electrical cycle of the motor.

Abstract: Provided are a terahertz wave detection device and a terahertz wave detection system to execute checking at high speed with high sensitivity and accuracy and to execute omnidirectional inspection without requiring a large checking system. A flexible array sensor (30) includes: a terahertz wave detection element (10) having a flexible single-walled carbon nanotube film (11), and a first electrode (12) and a second electrode (13) disposed to face each other on a two-dimensional plane of the single-walled carbon nanotube film (11); and a flexible substrate (20) having flexibility to support the terahertz wave detection element (10) so as to be freely curved. The flexible substrate (20) is preferably formed in a curved or cylindrical shape, so that the terahertz wave detection elements (10) are arrayed on the flexible substrate 20 formed in a curved or cylindrical shape.

Abstract: A terahertz wave detection device includes a low-dimensional electron system material formed on a substrate; and a first electrode and a second electrode opposingly arranged on a two-dimensional plane of the low-dimensional electron system material. The first electrode and the second electrode are made of metals having different thermal conductivity. An 8-element array sensor includes eight terahertz wave detection devices aligned in an array. The terahertz wave detection device includes carbon nanotube film; a first electrode disposed on one side of the carbon nanotube film; and a second electrode disposed on the other side of the carbon nanotube film. The first electrode and the second electrode have different thermal conductivity.

Abstract: According to an aspect, a display apparatus includes: a display device that includes a display area in which a plurality of pixels are provided; an illuminator that includes a light guiding plate opposed to the display area and a light source configured to emit light to the light guiding plate; and a light controller configured to adjust an amount of light emitted from the illuminator. The light controller includes: a first substrate provided with a plurality of light control areas opposed to the display area; a plurality of electrodes arranged in a matrix in each of the light control areas; circuitry configured to control light transmittance of each of the light control areas; and a plurality of wiring lines that couple the circuitry and the electrodes.

Abstract: A personal space creation system includes: an autonomous mobile body having a part that blocks a line of sight of a user; and an information processor that controls behavior of the autonomous mobile body, the personal space creation system moving the autonomous mobile body in an open space to provide a personal space to the user, wherein the information processor includes a hardware processor that acquires position information and state information of at least a user as a target to which a blind effect is applied, sets an exclusive area and a free area in accordance with the position information and the state information of the user, and sets a blind spot near a boundary between the exclusive area and the free area, and creates and notifies the autonomous mobile body of a moving route through which the autonomous mobile body is moved to the blind spot.

Abstract: A terahertz wave detection device includes a low-dimensional electron system material formed on a substrate; and a first electrode and a second electrode opposingly arranged on a two-dimensional plane of the low-dimensional electron system material. The first electrode and the second electrode are made of metals having different thermal conductivity. An 8-element array sensor includes eight terahertz wave detection devices aligned in an array. The terahertz wave detection device includes carbon nanotube film; a first electrode disposed on one side of the carbon nanotube film; and a second electrode disposed on the other side of the carbon nanotube film. The first electrode and the second electrode have different thermal conductivity.

Abstract: A control device of a permanent magnet synchronous motor that is a control device of a sensorless-type permanent magnet synchronous motor in which a rotor using a permanent magnet rotates by a rotating magnetic field caused by a current flowing in an armature includes: a driver that applies a voltage to the armature and drives the rotor; an initial position estimator that estimates an initial position which is a magnetic pole position of the rotor that is stopped; and a controller that controls the driver so as to apply a pulse train including a voltage pulse for searching the initial position for each of n angle positions dividing a search range of an electrical angle of 360 degrees to the armature, wherein the pulse train includes a first pulse and a second pulse.

Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.

Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.

Abstract: According to an aspect, a display device includes a display panel comprising a plurality of pixels, a light guide plate, a light source configured to emit light from a lateral side of the light guide plate, a dimming panel, and a controller. The dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source. The dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel. When adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance.

Abstract: In a motor control device, when estimating an initial position of a magnetic pole of a rotor of a motor, a drive circuit continuously or intermittently applies a voltage to a stator winding at each of a plurality of energization angles while sequentially changing the energization angles, and at a voltage value and for an energization time period, the voltage value and the energization time period being set such that the rotor does not rotate. An initial position estimation unit calculates an estimated initial position of the magnetic pole of the rotor based on a phase angle of a trigonometric function curve that approximates a change of a ?-axis current I? with respect to each of the energization angles. The trigonometric function curve has a cycle equal to one electrical cycle of the motor.