| Patent Number |
Title Of Patent |
Date Issued |
| 7230567 |
Azimuth/attitude detecting sensor |
June 12, 2007 |
| The sensor successively calculates a rolling angle, pitch angle and azimuth from the coordinate transformation matrix with the level error and azimuth error compensated. It calculates azimuth error compensatory values using the GPS direction signal and calculates a difference between |
| 6928369 |
Ultrasonic current meter |
August 9, 2005 |
| The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section 110 generates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission/reception ultrasonic transducers 6 an |
| 6679118 |
Accelerometer and spherical sensor type measuring instrument |
January 20, 2004 |
| An object is to provide an accelerometer or a spherical sensor-type measurement device, able to control by means of an active restraining control system a spherical mass part or a spherical sensor part. The accelerometer or spherical sensor-type measurement device has a spherical mas |
| 6668648 |
Acceleration detection type gyro device |
December 30, 2003 |
| An acceleration-detecting type gyro apparatus of an electrostatic supporting type, in which displacements of a gyro rotor are actively made zero is proposed. The acceleration-detecting type gyro apparatus includes: a gyro case; a gyro rotor which is supported within the gyro case by |
| 6131297 |
Gyro compass |
October 17, 2000 |
| To provide a gyro compass for the use of a high speed ship, in a gyro compass of the type having north-seeking means which is applied to support a gyro sphere or gyro case immersed in a liquid in a tank, a substantially first-order lag filter is provided in an azimuth follow-up loop or a |
| 5974797 |
Hydraulic actuator package |
November 2, 1999 |
| A hydraulic actuator package of the present invention comprises a variable displacement hydraulic motor for driving an inertia object with acceleration or deceleration, a speed sensor for detecting a speed of an output shaft of the hydraulic motor, a control valve for continuously va |
| 5920983 |
Acceleration-detecting type gyro and manufacturing method thereof |
July 13, 1999 |
| An electrostatic supporting type acceleration detecting gyro apparatus is formed as an active type so as to be able to positively cancel a displacement of a gyro rotor. Control DC voltages for generating electrostatic supporting forces and displacement detection AC voltages for detec |
| 5821420 |
Vibration-type gyro apparatus for calculating angular velocity |
October 13, 1998 |
| This invention relates to a vibration-type gyro apparatus for measuring an angular velocity using the Coriolis force exerted on a tuning fork. The tuning fork has two vibrational members symmetric about a Z axis. The two vibrational members vibrate along Z axis and are displaced along a |
| 5786535 |
Flaw detection apparatus employing tire probes having ultrasonic oscillators mounted therein |
July 28, 1998 |
| An apparatus for detecting flaws using supersonic waves measures a thickness of a test object or a position of a cavity inside the test object by employing a pair of ultrasonic probes. By, changing a relative position of one ultrasonic probe to that of the other ultrasonic probe, a p |
| 5781985 |
Method of making a gyro apparatus |
July 21, 1998 |
| An acceleration detection gyro apparatus is of the electrostatic supporting type. This gyro apparatus call be made inexpensive, long in life, excellent in durability and can be applied to a wide variety of fields. A gyro rotor (20) is supported relative to a gyro case (21) by an elec |
| 5781296 |
Closed loop type fiber optic gyroscope for measuring absolute rotation by delta serrodyne wave p |
July 14, 1998 |
| A fiber optic gyro can overcome the defects encountered with conventional fiber optic gyros of phase-modulation method, closed-loop system with serrodyne modulation and digital modulation. A reference phase difference .DELTA..beta. and a ramp phase difference .sigma. are generated in an |
| 5745225 |
Apparatus for measuring a shape of road surface |
April 28, 1998 |
| An apparatus of for measuring roughness of a road surface such as convex, concave or inclination is to be mounted on the vehicle. The apparatus comprises a rotation driving member for generating rotation motion in vertical plane and for outputting a signal concerning its rotation angle. |
| 5719335 |
Electrostatic rate gyroscope |
February 17, 1998 |
| An acceleration detection gyro apparatus is of the electrostatic supporting type. This gyro apparatus can be made inexpensive, long in life, excellent in durability and can be applied to a wide variety of fields. A gyro rotor (20) is supported relative to a gyro case (21) by an electrost |
| 5698783 |
Acceleration-detection type gyro |
December 16, 1997 |
| An electrostatic supporting type acceleration detecting gyro apparatus is formed as an active type so as to be able to positively cancel a displacement of a gyro rotor. Control DC voltages for generating electrostatic supporting forces and displacement detection AC voltages for detec |
| 5630064 |
Data processing apparatus using reader/writer and data carrier |
May 13, 1997 |
| A response permission command is transmitted from a reader/writer, thereby setting all of data carriers to a response possible state. Subsequently, a data return command is transmitted, thereby returning data for collation on a bit unit basis. The reader/writer transmits a data collation |
| 5602336 |
Flow detection apparatus employing tire probes having ultrasonic oscilators mounted therein |
February 11, 1997 |
| An apparatus for detecting flaws using supersonic waves measures a thickness of a test object or a position of a cavity inside the test object by employing pair of ultrasonic probes. By changing a relative position of one ultrasonic probe to that of the other ultrasonic probe, a plur |
| 5584598 |
Concrete-floor finisher |
December 17, 1996 |
| A concrete-floor finisher includes a plurality of rotary shafts (28) supported on a supporting plate (2) of a machine proper (1) so as to be tiltable in x and y directions and rotatable opposite to each other, and a plurality of blades (12a to 12d) radially arranged relative to a rotor |
| 5517204 |
Antenna directing apparatus |
May 14, 1996 |
| An antenna having a central axis is supported on a supporting member which in turn is supported on an azimuth gimbal. The antenna and the supporting member are rotatable around an elevation axis perpendicular to the central axis gimbal is supported on a base and is rotatable around an az |
| 5515287 |
Navigation display apparatus for collison avoidance utilizing polygonal safety regions and predi |
May 7, 1996 |
| A navigation supporting display apparatus makes it easy for an operator of ship to navigate with a safe passing distance between own ship and a target by indicating an exact danger area between own ship and the target ship. The apparatus has a collision point calculator which calculates |
| 5474012 |
Automatic control for trim tabs |
December 12, 1995 |
| Adjustment is made of the position of a marine transportation system including a boat having a drive, a trimmable port tab and a trimmable starboard tab. The operation of the marine transportation system is monitored to provide an output distinguishing boat operation in an on-plane c |
| 5416976 |
Gyro compass |
May 23, 1995 |
| A gyro compass having a gyro case housing therein a gyro and supported with freedom of three axes, functions for outputting a signal corresponding to an inclined angle of the gyro spin axis relative to the horizontal plane, and a function for applying a torque around a vertical axis of t |
| 5354975 |
Contactless data processing apparatus |
October 11, 1994 |
| When a control section of a data carrier discriminates a command from a reader/writer, either one of two kinds of pseudo random signals is returned in accordance with a bit 0 or 1 of response data. When two autocorrelation values obtained by correlation arithmetic operations are simu |
| 5349531 |
Navigation apparatus using a global positioning system |
September 20, 1994 |
| A navigation apparatus utilizing a global positioning system having at least first and second satellite reception antennas installed on a navigation vehicle with a predetermined distance therebetween, a first azimuth computing unit for computing a first azimuth angle of the navigatio |
| 5305429 |
Input apparatus using three-dimensional image |
April 19, 1994 |
| An instruction point is movably provided in a three-dimensional space and can be freely moved by a finger tip of an operator. When the operator moves the instruction point to a desired position in the three-dimensional space and selects an arbitrary point, a three-dimensional position of |
| 5280728 |
Ultrasonic flow velocity measurement method and apparatus thereof |
January 25, 1994 |
| An ultrasonic flow velocity measurement method and apparatus thereof and comprises ultrasonic wave transducers disposed on the upstream and downstream sides of a pipe and a control apparatus connected to these ultrasonic wave transducers. Concerning the flow velocity measurement, an |
| 5272815 |
Gyro compass |
December 28, 1993 |
| A gyro compass having a gyro case housing therein a gyro and supported with freedom of three axes, functions for outputting a signal corresponding to an inclined angle of the gyro spin axis relative to the horizontal plane and a function for applying a torque around a vertical axis of th |
| 5247748 |
Gyro compass |
September 28, 1993 |
| A gyro compass having a gyro case housing therein a gyro whose spin axis is held substantially in the horizontal plane, a supporting device for supporting the gyro case with freedom of three axes and means for applying a torque proportional to an inclined angle of the gyro spin axis rela |
| 5243296 |
Method and apparatus for checking operation of solenoid |
September 7, 1993 |
| When a solenoid has been turned on by supplying current to a coil thereof, the solenoid operation is checked by temporarily ceasing the supply of current to the coil to temporarily deenergize the solenoid. The current flowing in the coil is detected while the solenoid is temporarily |
| 5230364 |
Pressure relief valve |
July 27, 1993 |
| A proportional pressure release valve comprising a valve body incorporating a valve seat, a valve closure member mounted in the valve body and cooperable with the valve seat to control flow of fluid through the valve from an inlet pressure port to an outlet tank port, and electromagnetic |
| 5206838 |
Ultrasonic transducer |
April 27, 1993 |
| An ultrasonic transducer is provided with an ultrasonic transmitter; an ultrasonic receiver; and a propagation-delay-time calculating device for calculating a propagation delay time from the time when an ultrasonic wave is transmitted by the transmitter until the time when the ultrasonic |
| 5200727 |
Force generating apparatus |
April 6, 1993 |
| A force generating apparatus having spacings through which magnetic fluxes are traveled, a magnetic circuit including two permanent magnets supplying magnetic fluxes to the spacings and a conductor disposed in the direction perpendicular to the magnetic fluxes in the spacings is comprise |
| 5199044 |
System for detecting position of object having data carrier |
March 30, 1993 |
| A plurality of data carriers are prepared and possessed by, for example, persons who enter a building. The data carrier spread spectrum modulates a carrier signal of a predetermined frequency by an assigned Gold series corresponding to an ID code and transmits the modulated signal. Leaky |
| 5198787 |
Waveguide for dividing and combining microwaves |
March 30, 1993 |
| A waveguide having a pair of quarter-wavelength impedance transformers and adapted to divide and combine microwaves. The pair of quarter-wavelength impedance transformers includes two strip transmission lines connected together at one end, two ground conductors each located adjacent to a |
| 5170667 |
Method and apparatus for monitoring state of polymeric materials |
December 15, 1992 |
| An ultrasonic wave is emitted from an ultrasonic wave transducer for transmission to polymeric materials and received by an ultrasonic wave transducer for reception arranged at a predetermined distance away from the transducer for transmission. A propagation time of the ultrasonic wave |
| 5150084 |
Power divider |
September 22, 1992 |
| A distributed-line power divider comprising: a common port and n distributing ports adapted to be connected with respective external lines; and n impedance transformers disposed between the common port and the distributing ports and having a filter function. The filter function of th |
| 5095630 |
Electronic magnetic compass |
March 17, 1992 |
| Disclosed is an electronic magnetic compass which is to be mounted on a small ship and which is reduced in cost and improved in performance. The electronic magnetic compass is provided with an angle sensor interlocked with a compass card so as to produce a code signal at every predetermi |
