Instrument Mechanisms With Acceleration Compensation Patents (Class 73/DIG10)
  • Patent number: 5750897
    Abstract: An active anti-vibration apparatus detects the motion of an anti-vibration table for supporting equipment with a plurality of sensors and controls actuators on the basis of detection outputs from the sensor. The sensors are arranged such that, when a motion parameter of the anti-vibration table is represented by a vector P, and an output signal group from the plurality of sensors is represented by a vector S, a condition number of a matrix A defined by an equation S=AP established between the vector P and the vector S in accordance with a geometrical arrangement of the plurality of sensors is minimized.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: May 12, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroaki Kato
  • Patent number: 5386736
    Abstract: A gauging system for a fluid tank includes means for determining fluid pressure data for the tank; means for determining acceleration data of the tank; and means for determining quantity of fluid in the tank as a function of the pressure and acceleration data. A method for determining quantity of fluid in a tank is also provided and includes the steps of:a. determining an orientation vector for each of a plurality of sensing areas of the tank;b. producing an output corresponding to pressure of the fluid on each of the respective sensing areas;c. determining an acceleration vector of the tank; andd. calculating quantity of fluid in the tank as a function of the pressure output signals, the orientation vectors and the acceleration vector.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: February 7, 1995
    Assignee: Simmonds Precision Products, Inc.
    Inventor: William B. Spillman, Jr.
  • Patent number: 5182515
    Abstract: A force detector is comprised of resistance elements having a piezo resistance effect such that electric resistance varies due to mechanical deformation, and formed on a single crystal substrate (10), and a strain generative body (20) having a supporting portion (21) and a working portion (23), thus allowing the resistance elements to produce a mechanical deformation on the basis of a displacement with respect to the supporting portion of the working portion. This force detector can detect a force applied to the working portion as changes in resistance values of the resistance elements. The plane on which resistance elements are to be formed on the single crystal substrate is selected so that piezo resistance coefficients in two directions perpendicular to each other exhibit peak. When a weight body (30) is connected to the working portion, it is possible to detect an acceleration acting on the weight body.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: January 26, 1993
    Assignee: Wacoh Corporation
    Inventor: Kazuhiro Okada
  • Patent number: 5036715
    Abstract: A force sensing assembly and particularly one which is especially suitable for use as a pressure transducer is disclosed herein. This assembly includes at least one and preferably a stacked pair of resonating type force sensing devices supported from one end in a cantilvered fashion.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: August 6, 1991
    Inventor: Richard Hanson
  • Patent number: 4991446
    Abstract: A method and apparatus for compensating for errors in the measurement of force applied to a load beam interposed between two compliant supports and a load point involves placement of an accelerometer at a selected location on the load beam. Signals produced by the accelerometer are added to a signal produced by a transducer at one of the compliant supports to obtain a composite signal which is compensated for accelerations of the load beam.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: February 12, 1991
    Assignee: Metriguard, Inc.
    Inventor: Friend K. Bechtel
  • Patent number: 4989458
    Abstract: An apparatus for detecting a torque quantity of an oscillation-type electric dynamometer which comprises a vibration detector installed on a torque arm extended from an oscillator of the dynamometer for detecting the vibration of the torque arm in the direction in which the torque arm applies a force to a load cell, a DC signal elimination circuit for eliminating signal components whose frequencies are in the proximity to a DC signal from the output signal of the vibration detector, a coefficient setting/adding circuit for deriving and setting a vibration torque of the oscillator from the output signal of the DC signal elimination circuit, and an adder for adding the output signal of the coefficient adding/setting circuit to the torque detection signal derived via the load cell to provide a torque detection output. Therefore, an output variation of the vibration detector due to the change in temperature of the vibration detector is eliminated by the DC signal elimination circuit.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: February 5, 1991
    Assignee: Kabushiki Kaisha Meidensha
    Inventor: Yorikatsu Suzuki
  • Patent number: 4054052
    Abstract: An aircraft instrument with an acceleration compensation device comprises at least a capsule, a rocking axle, a link mechanism to transmit displacements of a free end of the capsule to the rocking axle, a first gear integrally provided with the rocking axle, a second gear meshed with the first gear and being rotatable, and weights. The weights are provided on the first gear and the second gear each correspondingly, and rotative force of the weights caused by an acceleration force works on the rocking axle so as to cancel the rotative force of the rocking axle by the displacements, due to the acceleration, of the free end of the capsule.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: October 18, 1977
    Assignee: Tokyo Aircraft Instrument, Co., Ltd.
    Inventor: Kazushi Nakahama