Abstract:
A three-dimensional position detecting device includes a rotational mechanism configured to rotate about a predetermined rotation axis, and includes a LIDAR unit disposed on the rotation axis to scan in response to each rotation angle at which the rotational mechanism rotate to detect at least one first three-dimensional position of an object. The three-dimensional position detecting device includes an imaging unit disposed to be away from the rotation axis in a direction perpendicular to the rotation axis, the imaging unit being configured to capture multiple images of the object based on rotation of the imaging unit through the rotational mechanism. The three-dimensional position detecting device includes a processor configured to detect a second three-dimensional position of the object based on the captured multiple images with respect to respective rotation angles at which the rotational mechanism rotates.
Abstract:
A moving-member detecting device includes an image acquiring unit and a speed calculating unit. The image acquiring unit includes a light source configured to emit a light beam to a detecting position of a moving member; an area sensor configured to acquire image data of a one- or two-dimensional image; and an area-sensor control unit configured to acquire the image data. The image acquiring unit is configured to acquire pieces of image data of the moving member at first and second positions, respectively, in a moving direction of the moving member so as to acquire the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position. The speed calculating unit is configured to calculate a moving speed of the moving member from the pieces of image data.
Abstract:
Angular widths of respective magnetic poles of a detection rotor are stored and divisions are set for respective magnetic pole pairs. Based on output signals from first and second magnetic sensors, a rotation angle computation unit computes first and second rotation angles that are rotation angles within the corresponding division. Based on the angular widths, the rotation angle computation unit identifies the magnetic pole sensed by the first magnetic sensor and computes a first absolute rotation angle using the first rotation angle. Based on the identified magnetic pole and the second rotation angle, the rotation angle computation unit computes a second absolute rotation angle. The rotation angle of the detection rotor is computed based on the first and second absolute angles.
Abstract:
Upon detecting a peak value from output signals of one of either a first or a second magnetic sensor, an rotation angle computation device identifies, on basis of an amplitude compensation table corresponding to the one magnetic sensor for which the peak value was detected, a pole number of a magnetic pole sensed by the magnetic sensor. Then, based on the identified pole number and a magnetic pole identification table, a pole number of a magnetic pole sensed by the other magnetic sensor is identified. The pole numbers of the magnetic poles sensed by the respective magnetic sensors are thus identified, and the rotation angle computation device compensates the output signals of the respective magnetic sensors using amplitude compensation gains corresponding to the sensed magnetic poles (magnetic pole pair).
Abstract:
A command current setting portion has a target value corrector that calculates d-axis and q-axis current command values idc, iqc that are to be supplied to an open-loop controller, based on d-axis and q-axis current target values id*, iq*. When d-axis and q-axis voltage target value vd*, vq* calculated from the d-axis and q-axis current target values id*, iq* by the motor circuit equations exceed a voltage limit, this target value corrector 26 corrects the d-axis and q-axis current target values id*, iq* by the field weakening control such that d-axis and q-axis voltages vd, vq and d-axis and q-axis currents id, iq satisfy √(vd2+vq2)≦Vlim and √(id2+iq2)≦Ilim respectively. The d-axis and q-axis current command values idc, iqc are obtained by this correction.
Abstract:
An ice-making machine has a box-shaped lower housing with an ice storage bin, a box-shaped upper housing mounted on a rear portion of the lower housing, an ice-making mechanism within the front portion of a machine compartment in the upper housing, and a freezing unit installed behind the ice-making mechanism for supplying refrigerant to the ice-making mechanism. An open-and-close ice-access lid is pivotally mounted between the lower end of the upper housing and the the lower housing. An air intake passage introduces outside cooling air from the front face of the lower housing into the machine compartment along inner surfaces of one side wall and a rear wall of the lower housing. An air discharge passage is provided for passing the air after cooling to flow outward along inner surfaces of the rear wall and the other side wall of the lower housing to an exterior discharge from the front face of the lower housing.
Abstract:
In a motor controller, a current detection unit detects an electric current flowing through a brushless motor. An open loop control unit determines a command value indicating a level of a command voltage in accordance with a motor circuit equation, based on a command current value indicating an amount of electric current to be supplied to the brushless motor and an angular velocity of a rotor in the brushless motor. A correction unit calculates a correction value based on a difference between the command current value and a current value detected by the current detection unit when the electric current is detected by the current detection unit and corrects the command value according to the correction value, and corrects the command value according to the correction value even when an electric current is not detected by the current detection unit.
Abstract:
Herein describes, by example, a case structure that includes a first cover, a second cover and a first side frame. The second cover opposes the first cover. An internal space is formed between the first cover and the second cover. The first side frame is arranged between the first cover and the second cover. The first side frame has a reinforcing part and a strap holder part. The reinforcing part is arranged along each of a first side end part of the first cover and a second side end part of the second cover. The reinforcing part is connected to each of the first side end part and the second side end part. The strap holder part connects to an end part of the reinforcing part. The strap holder part is folded in an outward direction from the internal space.
Abstract:
An optical scanning device includes a first optical system for guiding light beams emitted from a plurality of light emitting units to an optical deflector, and a second optical system for focusing the light beams to optically scan a surface to be scanned. At least one of the first optical system and the second optical system includes a resin lens having a diffractive surface. The diffractive surface includes a diffractive portion and a refractive portion. A power of the diffractive portion and a power of the refractive portion cancel each other.
Abstract:
An optical scanning device includes a first optical system for guiding light beams emitted from a plurality of light emitting units to an optical deflector, and a second optical system for focusing the light beams to optically scan a surface to be scanned. At least one of the first optical system and the second optical system includes a resin lens having a diffractive surface. The diffractive surface includes a diffractive portion and a refractive portion. A power of the diffractive portion and a power of the refractive portion cancel each other.