Patents by Inventor Toshihiko Matsuda
Toshihiko Matsuda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5504930Abstract: A programmable controller for executing a program having mixed instructions. The programmable controller includes a bit operation memory for storing a mixed instruction inclusive of the mixture of bit operation instructions and word operation instructions in order of execution and a word operation memory for storing the word operation instructions in the mixed instruction in order of execution. A bit operation processor is provided in the programmable controller for outputting a start command for a word operation instruction when a word operation instruction read from the bit operation memory subsequently to the execution of the bit operation instruction has been recognized.Type: GrantFiled: May 15, 1995Date of Patent: April 2, 1996Assignee: Hitachi, Ltd.Inventors: Mitsuaki Kobayashi, Toshihiko Matsuda, Yasuo Morooka, Kunihiko Onuma, Noboru Azusawa, Hiromitsu Kikuchi
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Patent number: 5446377Abstract: A magnetic detector for detecting a magnetism present in the vicinity of or close to a magnetic wire circumferentially magnetized therein and an electromagnet for generating an A.C. magnetic field on the basis of the magnitude of a Matteucci-effect voltage developed across the magnetic wire when the electromagnet approaches the magnetic wire. A coordinate input device for detecting proximity between the electromagnet and an array of a plurality of such magnetic wires arranged in X and Y directions when the electromagnet approaches the array. A magnetic image sensor for detecting an intensity distribution of a static magnetic field to be detected and present along a longitudinal direction of the wire on the basis of a detection voltage of the wire when a plurality of such electromagnets arranged along the longitudinal direction of the wire are sequentially excited one after another.Type: GrantFiled: September 10, 1993Date of Patent: August 29, 1995Assignee: Hitachi, Ltd.Inventors: Kaneo Mohri, Mitsunari Kano, Toshihiko Matsuda, Jiro Kino, Morihiko Takashi, Yoshiharu Konishi, Junichi Oizumi
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Patent number: 5298689Abstract: A magnetic detector for detecting a magnetism present in the vicinity of or close to a magnetic wire circumferentially magnetized therein and an electromagnet for generating an A.C. magnetic field on the basis of the magnitude of a Matteucci-effect voltage developed across the magnetic wire when the electromagnet approaches the magnetic wire. A coordinate input device for detecting proximity between the electromagnet and an array of a plurality of such magnetic wires arranged in X and Y directions when the electromagnet approaches the array. A magnetic image sensor for detecting an intensity distribution of a static magnetic field to be detected and present along a longitudinal direction of the wire on the basis of a detection voltage of the wire when a plurality of such electromagnets arranged along the longitudinal direction of the wire are sequentially excited one after another.Type: GrantFiled: November 26, 1991Date of Patent: March 29, 1994Assignee: Hitachi, Ltd.Inventors: Kaneo Mohri, Mitsunari Kano, Toshihiko Matsuda, Jiro Kino, Morihiko Takashi, Yoshiharu Konishi, Junichi Oizumi
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Patent number: 5228100Abstract: A data processing system for inputting data to a form display includes a scanner for inputting an image of a form document to the system, a processor for recognizing character and line patterns from the form document image supplied from the scanner to produce physical structure data of the document and logical structure data related to data input/output fields in the form document depending on the physical structure data so as to automatically produce based on the logical structure data a program to input data to the form display, a display screen for presenting thereon a form display defined by the physical structure data or normalized data obtained by correcting the physical structure data to be adaptive to a cursor pitch, a data input key apparatus, and a printer for producing a printout document based on the form display filled with the data.Type: GrantFiled: July 10, 1990Date of Patent: July 13, 1993Assignees: Hitachi, Ltd., Hitachi Software Engineering Co., Ltd.Inventors: Haruo Takeda, Masayuki Tsuchiya, Hitoshi Suzuki, Syozi Yamada, Toshihiko Matsuda, Hiroshi Fujise, Yoshiaki Kuno, Ichitaro Koai
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Patent number: 5191622Abstract: A hand-written character recognition apparatus with a personal dictionary preparation function has a character recognition unit for comparing an input hand-written character data with a registered standard dictionary to recognize a most similar character pattern, and a display unit for selecting and displaying a display font corresponding to the recognized character pattern, so that a personal peculiar character or simplified character inputted can be recognized. When a personal dictionary is to be registered, the character to be registered is inputted by hand-writing, the character recognition unit compares the input hand-written character data with the standard dictionary to recognize a similar character pattern, and the recognized character code of the standard dictionary is selected as the character code to be registered.Type: GrantFiled: July 15, 1988Date of Patent: March 2, 1993Assignee: Hitachi, Ltd.Inventors: Hiroshi Shojima, Soshiro Kuzunuki, Yasushi Fukunaga, Toshihiko Matsuda, Toshio Takekoshi, Masaki Miura, Junko Mori, Toshimi Mifune
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Patent number: 4995126Abstract: A cushion using disposable heat pads. A ventilated outer bag contains in its interior, a sheet having at its upper side a recessed air passage, disposable heat pads containing powders such as of oxidized metal and water-containing material, and a cushion, which are put in layers in this order from the lower side of the bag. The disposable heat pads are well ventilated from the air passage of the sheet laid thereunderneath, so that the heating effect can be improved.Type: GrantFiled: April 23, 1990Date of Patent: February 26, 1991Assignee: Marumanji Sangyo Co., Ltd.Inventor: Toshihiko Matsuda
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Patent number: 4983875Abstract: An actuator suitable for use in a joint device for driving a robot arm or in a subject follow-up device in a video camera, etc., is designed to have a mobility of a freedom of two degrees or more and is adapted to drive a movable part directly using first piezoelectric motor elements each of which consists of piezoelectric elements having a non-ring-like configuration and an elastic body and second piezoelectric motor elements each of which consists of at most one ring-like piezoelectric element and an elastic member. The actuator exhibits a simplified structure, is small and lightweight, provides a powerful driving power and has a wide range of mobility.Type: GrantFiled: June 19, 1989Date of Patent: January 8, 1991Assignee: Hitachi, Ltd.Inventors: Ryoso Masaki, Masahiro Kayama, Hiroshi Hayashida, Hideki Nihei, Yasunori Katayama, Hiroshi Nagase, Toshihiko Matsuda, Kenzo Kamiyama
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Patent number: 4965504Abstract: A control apparatus for controlling a PWM inverter, the PWM inverter receiving AC power and generating an AC output having a controlled frequency to be supplied to an AC motor, comprises a circuit for generating, on the basis of a given running command, a PWM signal controlling the inverter with a given sampling period, and a circuit for controlling the PWM signal generating circuit, whereby the AC motor generates an electromagnetic tone preselected so as to correspond to desired information when the AC motor is driven by output of the inverter controlled by the PWM signal. The above described desired information may be information representing the running state of the motor or selected music.Type: GrantFiled: September 13, 1989Date of Patent: October 23, 1990Assignee: Hitachi, Ltd.Inventors: Shigeta Ueda, Kazuo Honda, Takashi Ikimi, Toshihiko Matsuda, Hiroshi Nagase, Nobuyoshi Mutoh
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Patent number: 4872000Abstract: A coordinate input apparatus which comprises a display unit having a display layer, and a protecting layer disposed on said display layer and having two-dimensionally arranged light guides for transmitting light from the display layer in the direction substantially perpendicular to the display layer, wherein a user designates a coordinate position on the display layer through the protecting layer.Type: GrantFiled: July 20, 1987Date of Patent: October 3, 1989Assignee: Hitachi, Ltd.Inventors: Mitsunari Kano, Yoshiharu Konishi, Toshihiko Matsuda
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Patent number: 4839834Abstract: In a speed detecting apparatus for detecting the rotational speed of a rotating body mechanically coupled thereto, an encoder generates one cycle of a sine-wave signal each time its angular position of rotation changes by a predetermined unit amount. A zero-crossing pulse is generated at each zero-crossing point of the sine-wave signal generated from the encoder, and the phase angle of the sine-wave signal is detected on the basis of the zero-crossing point of the sine-wave signal generated from the encoder. In a high speed range, the rotational speed is detected on the basis of the ratio between the number of zero-crossing pulses and the time interval between a first one and a last one of the plural zero-crossing pulses. On the other hand, in a low speed range, the rotational speed is detected on the basis of the combination of the number of the zero-crossing pulses appearing within a predetermined period of time and the phase angle of the sine-wave signal.Type: GrantFiled: January 12, 1987Date of Patent: June 13, 1989Assignee: Hitachi, Ltd.Inventors: Tsutomu Omae, Toshihiko Matsuda, Youjirou Miyahara, Kenzo Kamiyama
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Patent number: 4814678Abstract: A speed control apparatus for a motor comprising a motor model formed of a motor current model and a motor speed model connected in cascade, a basic torque instruction signal being applied to the motor model, and first and second control loops comparing output signals from the motor current model and the motor speed model with an instantaneous actual motor current signal and an instantaneous actual motor speed signal respectively and generating first and second correction signal to be added to the basic torque instruction signal to form a corrected torque instruction signal which is applied to a motor current control circuit, whereby a speed oscillation is suppressed even when the motor is driving an oscillatory load.Type: GrantFiled: July 7, 1987Date of Patent: March 21, 1989Assignee: Hitachi, LtdInventors: Tsutomu Omae, Toshihiko Matsuda, Takashi Sukegawa, Masahiro Tobise
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Patent number: 4772996Abstract: A PWM inverter includes a plurality of arms connected in parallel with a d.c. power source. Each arm is constituted by an upper arm and a lower arm each having a switching element. A plurality of switching control signals are continuously and alternately applied to one and the other of the two switching elements constituting the same arm respectively. In the PWM inverter, shunt resistors are connected between a minus terminal of the d.c. power source and the lower arms respectively. The PWM inverter further comprises a waveform command generating circuit generating commands representative of current waveforms to be supplied to a load, a carrier wave generating circuit and sample-hold circuits. Each of the sample-hold circuits samples and holds a terminal voltage of the associated shunt resistor in synchronism with the period of the carrier wave generated from the carrier wave generating circuit and at specific timing in a conduction period of the associated switching element.Type: GrantFiled: April 9, 1987Date of Patent: September 20, 1988Assignee: Hitachi, Ltd.Inventors: Hiroyuki Hanei, Takeshi Hanada, Kenji Kubo, Masahiko Watanabe, Tsutomu Omae, Toshihiko Matsuda
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Patent number: 4584528Abstract: A counter is provided to count an output pulse which a pulse generator generates each time a vehicle moves by a predetermined distance. A microprocessor is provided to actuate a timer in synchronism with the leading edges of the output pulse from the pulse generator. The timer is set to a constant time interval during which the speed of the vehicle is to be detected. The microprocessor calculates the speed of the vehicle from the count of the counter which count is a value during the time interval from when the timer starts to operate to when the pulse generator generates a pulse just before or after the end point of the set time interval. Thus, the speed of the vehicle can be detected with good resolution and precision.Type: GrantFiled: February 25, 1982Date of Patent: April 22, 1986Assignee: Hitachi, Ltd.Inventors: Tsutomu Ohmae, Toshihiko Matsuda, Makoto Tachikawa
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Patent number: 4507693Abstract: A control apparatus for a rotation type magnetic storage device such as a magnetic disc device in which each of record tracks is composed of plural sectors, is disclosed. The apparatus comprises a memory for storing control information of address and the like of the sector to be accessed on a rotating recording medium and comparator means for comparing successively the control information read out from the sector of the rotating recording medium with the control information read out from the memory. In accordance with the output signal from the comparator, the sector of the rotating medium to be accessed is detected. The rotation type magnetic storage device having different sector formats can be controlled by altering correspondingly the control information stored in said memory.Type: GrantFiled: April 19, 1982Date of Patent: March 26, 1985Assignee: Hitachi, Ltd.Inventors: Toshihiko Matsuda, Morihiko Takashi, Mistuo Yoshida
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Patent number: 4490621Abstract: At least one caisson which is part or all of a breakwater forms a water chamber therein whose closure is a pendulum having a natural period in rocking or oscillating the same as a period of stationary wave surges caused in the water chamber by rocking movement of the pendulum owing to wave force impinging against the pendulum. At least one double-acting piston and cylinder assembly is connected to the pendulum, so that when a piston of the assembly is reciprocatively moved by the pendulum, pressure difference between cylinder chambers on both sides of the piston of the assembly controls a change-over valve which in turn controls hydraulic pressure discharged from the cylinder chambers to be supplied to a plurality of hydraulic motors respectively having accumulators of a type wherein accumulated pressure and volume of the hydraulic liquid are proportional to each other, whereby driving a common generator alternately by the hydraulic motors.Type: GrantFiled: April 14, 1983Date of Patent: December 25, 1984Assignee: Muroran Institute of TechnologyInventors: Tomiji Watabe, Hideo Kondo, Toshihiko Matsuda, Kenji Yano, Yasuhiko Dote, Matao Takagi
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Patent number: 4468724Abstract: A load DC motor is supplied with a DC current through a converter principally consisting of thyristors controlled by an ON-state control signal. The load current is detected both as to the mean value and the variation in time thereof. The mean value of the load current is calculated based on the load current values detected at the time of the present On-signal and the preceding ON-signal. The difference between the reference value and the mean value of the load current is calculated, and the difference between this differential signal and the variation of the load current is further calculated, so that the timing for providing the ON-signal is calculated based on the resultant differential signal.Type: GrantFiled: April 2, 1982Date of Patent: August 28, 1984Assignee: Hitachi, Ltd.Inventors: Tsutomu Omae, Toshihiko Matsuda, Makoto Tachikawa
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Patent number: 4337509Abstract: A digital control system for controlling firing pulses supplied to thyristors for power conversion to desired phases, wherein data necessary for obtaining desired phase control signals is set in a counter which normally counts clock pulses having a predetermined period and the firing pulses are generated in synchronism with the generation of overflow pulses from the counter. The data setting to the counter, which is repeated at a period shorter than that of the source voltage, is performed by reading out the actual count value of the counter by a digital arithmetic processor circuit, by correcting the read value by the use of the value corresponding to a desired phase and by setting the corrected value again in the counter.Type: GrantFiled: July 22, 1980Date of Patent: June 29, 1982Assignee: Hitachi, Ltd.Inventors: Tsutomu Omae, Toshihiko Matsuda