Patent application number | Description | Published |
20090051306 | Electric power tool, control unit and recording medium - An electric power tool includes a direct current motor, at least one switching device, a trigger switch, a control unit, and a drive unit. The control unit sets a driving duty ratio for PWM controlling the direct current motor so as to increase the driving duty ratio in a stepwise manner in accordance with an operation continuation time of the trigger switch during a period from when an operation of the trigger switch is started until when a predetermined start-up time has elapsed. | 02-26-2009 |
20090309519 | Power tool having an illuminator - A power tool of the present teachings comprises a prime mover that drives a tool, a main switch that causes the prime mover to operate when the main switch is turned on and causes the prime mover to stop operating when the main switch is turned off, an illuminator that lights a working area of the tool, and a lighting mode selector switch for switching the lighting mode of the illuminator between a plurality of lighting modes which include a first lighting mode and a second lighting mode. When the first lighting mode is selected, the illuminator will be turned on for a first predetermined period from the point at which the main switch is turned off. When the second lighting mode is selected, the illuminator will not be turned on during the first predetermined period from the point at which the main switch is turned off. | 12-17-2009 |
20100019716 | MOTOR CONTROLLER AND ELECTRIC POWER TOOL HAVING THE SAME - A motor controller is provided with a first PWM circuit that repeatedly outputs an on-signal at a first carrier frequency, a second PWM circuit that repeatedly outputs an on-signal at a second carrier frequency that is lower than the first carrier frequency, an AND circuit that receives both the on-signal outputted from the first PWM circuit and the on-signal outputted from the second PWM circuit and outputs a third on-signal which is a logical product of the received on-signals, and a voltage apply circuit that applies a voltage to the motor intermittently in synchronization with the third on-signal outputted from the AND circuit. At least one of the first carrier frequency and the second carrier frequency is equal to or lower than 1 kHz or equal to or higher than 3 kHz. As a result, generation of an unpleasant noise by a motor controller using two PWM circuits may be suppressed. | 01-28-2010 |
20100027979 | MOTOR CONTROLLER AND ELECTRIC POWER TOOL HAVING THE SAME - A motor controller is provided with a velocity processing unit that determines a corrected target rotation velocity by correcting the inputted target rotation velocity of the motor in accordance with a velocity deviation between the inputted target rotation velocity and an actual rotation velocity detected from the motor, a first PWM circuit that repeatedly outputs an on-signal having a first pulse width at a first carrier frequency, wherein the first pulse width of the on-signal is modulated by the first PWM circuit in accordance with the corrected target rotation velocity, a second PWM circuit that repeatedly outputs an on-signal having a second pulse width at a second carrier frequency, wherein the second pulse width is different from the first pulse width, the second carrier frequency is lower than the first carrier frequency, and the second pulse width of the on-signal is modulated by the second PWM circuit in accordance with the corrected target rotation velocity, an AND circuit that receives the on-signal outputted from the first PWM circuit and the on-signal outputted from the second PWM circuit and outputs third on-signal which is a logical product of the on-signals, and a voltage apply circuit that applies voltage to the motor intermittently in synchronization with the third on-signal outputted from the AND circuit. As a result, the rotation velocity of the motor may be correctly controlled. | 02-04-2010 |
20110315417 | ROTARY IMPACT TOOL - A rotary impact tool includes: a hammer rotating by receiving a rotational force of a motor; an anvil rotating by receiving a rotational force of the hammer; and an end tool attached to the anvil, the rotary impact tool being constructed such that when a torque of a value not less than a predetermined value is applied to the anvil from the outside, the hammer is disengaged from the anvil to rotate idle and applies an impact to the anvil in a rotational direction after rotating idle by a predetermined angle, the rotary impact tool including an impact detection means detecting impacts and a speed switching means switching the rotational speed of the motor, and when the impact detection means detects an impact during rotation of the anvil in a tightening direction, the speed switching means switches the rotational speed of the motor from a normal speed to a low speed. | 12-29-2011 |
20120129436 | POWER TOOL - An improved hand-held power tool is provided which can effectively reduce whirling vibration caused by imbalance of a rotating element. The power tool has a grip that is connected to a tool body and designed to be held by a user and a self-synchronous mechanism that reduces whirling vibration caused in the tool body or the grip when the tool bit is driven. The self-synchronous mechanism is of a phase variable type, having a rotating body which serves as a vibrator and is rotationally driven by a driving source different from a driving source for the tool bit. The self-synchronous mechanism is disposed in the tool body or the grip in which whirling vibration is caused, and arranged such that a phase of vibration of the rotating body is automatically tuned to a phase of the whirling vibration, thereby reducing the whirling vibration. | 05-24-2012 |
20130300333 | APPARATUS FOR ESTIMATING QUANTITY OF STATE RELATING TO MOTOR, AND ELECTRIC TOOL - The present application discloses an apparatus including: a motor model that reflects a characteristic of a motor and includes at least inputs pertaining to a first quantity of state and a second quantity of state and an output pertaining to a third quantity of state; a comparator that calculates a difference between the third quantity of state in an actual motor and the third quantity of state output from the motor model; and an amplifier that amplifies an output of the comparator at a predetermined gain. The first quantity of state in the actual motor is input into the motor model as the first quantity of state, and an output of the amplifier is input into the motor model as the second quantity of state. The apparatus then uses the output of the amplifier as an estimated value of the second quantity of state in the actual motor. | 11-14-2013 |
Patent application number | Description | Published |
20100245577 | SURROUNDINGS MONITORING DEVICE FOR A VEHICLE - A surroundings monitoring device for a vehicle, includes a pair of side cameras, each of which is provided at a side mirror, obtaining capture images capturing views extending to left and right of the vehicle including views below the side mirrors, respectively, an image graphic generating portion generating an image graphic of the vehicle from a view point above a rear portion thereof towards a front lower portion thereof, or from a view point above a front portion of the vehicle towards a rear lower portion thereof in order to include at least a portion of the vehicle and the side mirrors on the image graphic, and a side image generating portion generating left and right side images on the basis of the capture images so as to correspond to images shown at left and right portions of the image graphic displayed on a monitor, respectively. | 09-30-2010 |
20130002877 | IMAGE CONTROL APPARATUS - In order to provide an image control apparatus that allows a driver to easily check the situation of a passenger's getting on/off a vehicle through an opening operation of a door of the vehicle, the apparatus includes a camera which captures an image of the vicinity of the vehicle door, a monitor capable of displaying the image captured by the camera and a door opening detection sensor which detects an open state of the vehicle door. The monitor displays the image captured by the camera when the door opening detection sensor detects an open state of the door. | 01-03-2013 |
20130010117 | VEHICLE PERIPHERAL OBSERVATION DEVICE - Provided is a device whereby it is possible to accurately recognize which area has been enlarged when part of an overhead image displayed on a monitor is displayed as enlarged. When any one area of a plurality divided areas (D | 01-10-2013 |
20130010118 | VEHICLE PERIPHERAL OBSERVATION DEVICE - Provided is a device whereby the position of an obstacle can be perceived on a monitor without compromising the effectiveness of displaying an overhead image on the monitor. An overhead image generating unit generates an overhead image from images captured using a plurality of cameras, and the overhead image is displayed in an auxiliary display area ( | 01-10-2013 |
20130063601 | DRIVE ASSIST DEVICE - A drive assist device allows a driver to favorably check space for opening a back door along with an image of a periphery of a vehicle. The drive assist device is configured: to perform a viewpoint conversion that converts an image captured by a vehicle-mounted camera, which image is of a scene in the periphery of the vehicle including at least an area rearward of the vehicle, into an overhead image showing the vehicle from above; to superimpose on the overhead image a graphic image showing a flip-up back door in an open state from the same viewpoint as that of the overhead image; and to allow the superimposed image to be displayed on a monitor device in a vehicle compartment. | 03-14-2013 |
20130093851 | IMAGE GENERATOR - An image generator is provided which generates a monitor display image that facilitates easy recognition of a three-dimensional object in an overhead view image. An image generator includes: an overhead view image generation section for generating an overhead view image by performing a projective transformation, with a virtual viewpoint above a vehicle, of an image captured by an on-board camera for capturing an image of a surrounding region of the vehicle; a three-dimensional object detection section for recognizing a three-dimensional object present in the surrounding region and outputting three-dimensional object attribute information showing an attribute of the three-dimensional object; and an image composition section for generating a monitor display image for vehicle driving assistance by performing image composition of a grounding plane mark showing a grounding location of the three-dimensional object with a portion at the grounding location in the overhead view image, based on the three-dimensional object attribute information. | 04-18-2013 |
20140063197 | IMAGE GENERATION DEVICE - An image generation device that enhances visual recognizability between a recognized 3D (three-dimensional) object and a substitute image synthesized in an area of a 3D object image which is a photographed image of the 3D object includes an image synthesis section that recognizes a 3D object present in the peripheral area of a vehicle and outputs 3D object attribute information indicative of attributes of this 3D object, determines a 3D object image area as an image area of the 3D object in the photographed image based on position information included in the 3D object attribute information, outputs at least one of a substitute image of the 3D object applied with a color based on the color information and a substitute image of the 3D object under a specified directional posture of the 3D object specified based on type information and directional posture information and generates a bird's-eye view image with a substitution image in which the substitution image outputted from a substitution image output section is synthesized at the position of the 3D object image area. | 03-06-2014 |
20140152774 | VEHICLE PERIPHERY MONITORING DEVICE - A vehicle periphery monitoring device includes a first bird's-eye view image generation section generating a first bird's-eye view image through a two-dimensional plane projective transformation based on a photographed image acquired by an in-vehicle camera module, a second bird's-eye view image generation section generating a second bird's-eye view image through a three-dimensional plane projective transformation based on the photographed image, and a displaying image generation section generating a first displaying image for monitor displaying from the first bird's-eye view image and a second displaying image for monitor displaying having a higher displaying magnification than the first displaying image, from a predetermined area of the second bird's-eye view image corresponding to a predetermined area of the first bird's-eye view image. | 06-05-2014 |
20140152827 | VEHICLE PERIPHERY MONITORING SYSTEM - Provided is a vehicle periphery monitoring system that facilitates a driver's understanding about a photographing direction of an object which appears in an overlapping area of a bird's-eye view image generated from multiple photographed images. A displaying bird's-eye view image is generated by combining bird's-eye view image segments generated from the multiple photographed images photographed in a partially overlapping manner with superimposing mutually overlapped areas thereof. In displaying the displaying bird's-eye view image, a boundary-added bird's-eye view image formed by adding a boundary indicator to the overlapping area of the bird's-eye view image is displayed on a display unit; then, a merged superimposed image is displayed. The merged superimposed image is obtained by merging the overlapped areas of the bird's-eye view image according to a preset merger relationship. | 06-05-2014 |
20140160275 | VEHICLE CONTROL APPARATUS AND VEHICLE CONTROL METHOD - A vehicle control apparatus includes: an acquiring unit configured to acquire a plurality of items of image information of images photographed by a plurality of image pickup units provided on a vehicle as an outside environment of the vehicle and whose image picked-up areas are partly overlapped with each other; a correcting unit configured to compare a position of a first overlapped area included in one of two items of image information of images whose image picked-up areas are overlapped with each other with a position of a second overlapped area of the other image information, and if the position of the first overlapped area is closer to a center of a display area of the image information, correct the other image information so as to cause the luminance of the second overlapped area to match the luminance of the first overlapped area. | 06-12-2014 |