Abstract: A method for detecting powder is performed in a powder detection device including a pair of electrodes arranged to be opposed to each other with a gap interposed therebetween and an electric circuit electrically connected to the pair of electrodes. The method includes detecting powder filling in a case where the electric circuit together with powder and the electrodes forms a closed circuit when the powder fills the gap.

Abstract: A head-mounted display device includes: a first display that displays a first image, the first display being located in front of a pupil of a user in a forward-looking-state in which the pupil is looking forward; a second display that displays a second image, the second display being located diagonally in front of the pupil in the forward-looking-state; a first eye lens that causes first light of the first image to pass through the pupil, the first eye lens being located between the pupil and the first display in the forward-looking-state; and a second eye lens that causes second light of the second image to pass through the pupil, the second eye lens being located between the pupil and the second display in the forward-looking-state. The distance between the second display and the second eye lens decreases as a distance from the first display increases.

Abstract: An information input/display device including: a sensor detecting contact and outputting contact positions; a display unit displaying video signals each corresponding to one screen; a first drawing unit generating first video signals each corresponding to one screen, when displayed, that includes an image of a drawing of a continuous line formed by the contact positions; a second drawing unit generating second video signals each corresponding to an image of the drawing of the continuous line, the second drawing unit generating images of the drawing of the continuous line at a higher speed than the first drawing unit; and an adding unit adding each of the second video signals to a corresponding one of the first video signals. Images of the drawing of the continuous line generated by at least one of the first drawing unit and the second drawing unit change as time elapses in drawing processing.

Abstract: A video image processing device uses a plurality of video data captured by a plurality of cameras to generate a wide range video data of the entire celestial sphere having a 360-degree range around an area where the plurality of cameras is installed and to transmit the generated wide range video data of the entire celestial sphere to a video display device. The video display device detects a direction of the video display device as a direction of a sight line of the user, receives the transmitted wide range video data of the entire celestial sphere, segments a predetermined area of video data including a detection result of a sensor from the wide range video data of the entire celestial sphere, adjusts a luminosity of the extracted predetermined area of video data to fall in a certain range of luminosity, and displays the adjusted predetermined area of video data.

Abstract: A head-mounted display device having: an image display element displaying a two-dimensional image; an eyepiece magnifying and projecting the image displayed by the image display element; and a holder holding the image display element and the eyepiece, so that the viewer's eyeball sees, through the eyepiece, a magnified virtual image of the image displayed by the image display element. The image display element is a two-dimensional display device having the shape of a matrix, composed of a central portion which is flat, and a left side portion and a right side portion each of which has a sheet-like shape whose cross-section along a horizontal plane is curved toward the eyepiece away from the extension line of the central portion. In the image display element, pixels in the left and right side portions and are greater in size than pixels in the central portion.

Abstract: A method for controlling the respective input voltages transmitted to a servomotor that tilts the ladle such that the molten metal that flows from the ladle drops accurately into the pouring gate in the mold, a servomotor that moves the ladle back and forth, and a servomotor that moves the ladle up and down, by using a computer. In the method, a mathematical model of the area on which the molten metal that flows from the ladle will drop is produced, and then the inverse problem of the produced mathematical model is solved. In view of the effect of a contracted flow, the position on which molten metal drops is estimated by the estimating device for estimating the pouring rate and the estimating device for estimating the position on which molten metal will drop.

Abstract: A method for detecting powder is performed in a powder detection device including a pair of electrodes arranged to be opposed to each other with a gap interposed therebetween and an electric circuit electrically connected to the pair of electrodes. The method includes detecting powder filling in a case where the electric circuit together with powder and the electrodes forms a closed circuit when the powder fills the gap.

Abstract: An information input/display device including: a sensor detecting contact and outputting contact positions; a display unit displaying video signals each corresponding to one screen; a first drawing unit generating first video signals each corresponding to one screen, when displayed, that includes an image of a drawing of a continuous line formed by the contact positions; a second drawing unit generating second video signals each corresponding to an image of the drawing of the continuous line, the second drawing unit generating images of the drawing of the continuous line at a higher speed than the first drawing unit; and an adding unit adding each of the second video signals to a corresponding one of the first video signals. Images of the drawing of the continuous line generated by at least one of the first drawing unit and the second drawing unit change as time elapses in drawing processing.

Abstract: A method of automatically pouring molten metal from a ladle into a mold by tilting the ladle. In the method, the height of molten metal located above a molten metal outlet and the weight of molten metal flowing out of the ladle are estimated using an expanded Kalman filter on the basis of: the weight of the molten metal flowing out of the ladle, said weight being measured using a load cell; the voltage inputted to a servo motor; the angle of tilt of the ladle measured by a rotary encoder; and the position of the ladle in the lifting and lowering direction thereof. The sum of the weight of the molten metal flowing out of the ladle when the ladle is tilted rearward, said weight being estimated from the angle of tilt of the ladle and the height of the molten metal located above the molten metal outlet estimated by the expanded Kalman filter, and the weight of the molten metal flowing out of the ladle estimated by the expanded Kalman filter are estimated as the final weight of outflowing molten metal.

Abstract: A head-mounted display device having: an image display element displaying a two-dimensional image; an eyepiece magnifying and projecting the image displayed by the image display element; and a holder holding the image display element and the eyepiece, so that the viewer's eyeball sees, through the eyepiece, a magnified virtual image of the image displayed by the image display element. The image display element is a two-dimensional display device having the shape of a matrix, composed of a central portion which is flat, and a left side portion and a right side portion each of which has a sheet-like shape whose cross-section along a horizontal plane is curved toward the eyepiece away from the extension line of the central portion. In the image display element, pixels in the left and right side portions and are greater in size than pixels in the central portion.

Abstract: The present invention provides a method for green sand molding that prevents a bad casting by producing a mold that does not have a brittle surface. The method has the steps of filling the green sand into a flask while fluidizing the green sand by aeration at a pressure between 0.05 and 0.18 MPa, and squeezing the green sand that has been filled in the flask, wherein a mold is produced so that the friability of the mold is 10 or less. The friability is calculated by the following steps: putting the mold in a rotating cylindrical sieve that has a diameter of 177.8 min and. USA, sieve size No. 8, rotating the cylindrical sieve at 57 rpm for 60 seconds, dividing the weight of the sand that has passed through the sieve by the weight of the sand and multiplying the quotient by 100.

Abstract: The purpose of the present invention is to provide a method for accurately dropping molten metal that flows from a ladle into a pouring gate in a mold. The present invention includes a method for controlling the respective input voltages transmitted to a servomotor that tilts the ladle such that the molten metal that flows from the ladle drops accurately into the pouring gate in the mold, a servomotor that moves the ladle back and forth, and a servomotor that moves the ladle up and down, by using a computer. In the method, a mathematical model of the area on which the molten metal that flows from the ladle will drop is produced, and then the inverse problem of the produced mathematical model is solved. In view of the effect of a contracted flow, the position on which molten metal drops is estimated by the estimating device for estimating the pouring rate and the estimating device for estimating the position on which molten metal will drop. Then the estimated position is calculated by a computer.

Abstract: A method of estimating information on the projection states of projection elements (P) by using an analysis model in which discharged projection elements (P) repeatedly collided with rotation blades (13) in a projection machine having rotating blades (13). The method includes the steps of determining initial conditions including information on the size and rotation of blades (13), discharging information on the projection elements(P), and information on projection elements with respect to the blades (13) the step of storing the initial conditions, a computing step of computing the position of each projection element (P), and its velocity and direction after collision with a blade(13) based on the initial conditions, and the step of estimating information on projection state based on computation results.

Abstract: The object of the present invention is to provide a method for green sand molding that prevents a bad casting by producing a mold that does not have a brittle surface. The method comprises the steps of filling the green sand into a flask while fluidizing the green sand by aeration at a pressure between 0.05 and 0.18 MPa, and squeezing the green sand that has been filled in the flask, wherein a mold is produced so that the friability of the mold is 10 or less. The friability is a value that is calculated by the following steps: putting the mold in a rotating cylindrical sieve that has a diameter of 177.8 mm and USA sieve size No. 8, rotating the cylindrical sieve at 57 rpm for 60 seconds, dividing the weight of the sand that has passed through the sieve by the weight of the sand that has been put into the sieve, and multiplying the quotient by 100.

Abstract: A method of automatically pouring molten metal from a ladle into a mold by tilting the ladle. In the method, the height of molten metal located above a molten metal outlet and the weight of molten metal flowing out of the ladle are estimated using an expanded Kalman filter on the basis of: the weight of the molten metal flowing out of the ladle, said weight being measured using a load cell; the voltage inputted to a servo motor; the angle of tilt of the ladle measured by a rotary encoder; and the position of the ladle in the lifting and lowering direction thereof. The sum of the weight of the molten metal flowing out of the ladle when the ladle is tilted rearward, said weight being estimated from the angle of tilt of the ladle and the height of the molten metal located above the molten metal outlet estimated by the expanded Kalman filter, and the weight of the molten metal flowing out of the ladle estimated by the expanded Kalman filter are estimated as the final weight of outflowing molten metal.

Abstract: A control system for a lifting device in which a load moves up or down or maintains its position by a rope that is wound up or down by the rotation of a servo motor. It includes a device for measuring a force, a first controller, a second controller and a switching device. A total force that is applied at the lower part of the rope caused by a force for controlling, the mass of the load, and the acceleration of the load is measured. The first controller, based on the measured force computes the direction and the speed of the servo motor, and outputs a signal to it. The second controller determines a stable condition using Popov's stability criterion. The switching device replaces the first controller with the second controller when the value that is measured by the measuring device becomes less than a threshold.

Abstract: The present invention provides a plasma display panel driving method and a plasma display device, each of which is capable of securing image quality and realizing an improvement of a drive margin and a reduction in power consumption even in the case of an ultra high definition panel. The present invention divides a plurality of display electrode pairs into a plurality of display electrode pair groups. For each of the display electrode pair groups, the present invention divides one field period into a plurality of sub-fields, each including an address period and a sustain period, such that the address periods with respect to the display electrode pair groups do not overlap one another, the address period being a period in which an address process of causing address discharge in the discharge cell which should emit light is carried out, the sustain period being a period in which first and second sustain pulses are applied to a scan electrode and a sustain electrode.

Abstract: In a driving method of a plasma display panel of the present invention, plural display electrode pairs are divided into plural display electrode pair groups and one field is divided into plural sub-fields. The length of the sustain period is compared to the length of the erase period. If the sustain period is longer than the erase period, sustain discharge and erase discharge are performed for each of the display electrode pair groups, while if the sustain period is shorter than the erase period, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group. For a sub-field with a largest luminance weight or a sub-field with a highest lighting ratio, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group without fail.

Abstract: A simple, low cost drive circuit secures a sufficient number of subfields in a high resolution panel. The plasma display panel drive circuit groups plural sustain electrodes into first and second sustain electrode groups, and applies sustain pulses in the sustain period. The first and second sustain pulse generating circuits generate and apply sustain pulses to first and second electrode paths. First and second specific voltage application circuits apply a first specific voltage to the first and second electrode paths. The voltage selection circuit selects one of a plurality of voltages including at least a second specific voltage and a third specific voltage, and generates a selected voltage. The first and second sustain pulse generating circuits generate the sustain pulses based on the second specific voltage when the selected voltage is the second specific voltage, and when the selected voltage is the third specific voltage, apply the third specific voltage to the first and second electrode paths.