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| Number | Title | Issue Date |
| 7938004 | Systems and methods for angular rate and position measurement Disclosed herein are systems and methods of angular rate and position measurement that combine a small footprint with hardening and isolation technologies that allow it to function in acceleration, angular rate, noise and vibration environments that cause other gyro... | 05/10/2011 |
| 7762135 | Compensated measurement of angular displacement There is disclosed methods and apparatus for compensated measurement of angular displacement within an instrument (600), such as a total station. Improved and compensated measurement of angular displacement is obtained by using a combination of e.g. an angula... | 07/27/2010 |
| 7624636 | Method and system for operating a sensor A method and system for operating a sensor, particularly, a yaw rate sensor, which is housed inside a housing. In order to detect the potentially dangerous influence of mechanical vibrations upon the output of the sensor, the vibrations are sensed at the location of... | 12/01/2009 |
| 7428841 | Acceleration sensor and inclination-detecting method In an acceleration sensor detecting inclined displacement of a predetermined article from a basic position, the acceleration sensor (10) includes a sensor chip having a detection plane including one detection axis or two crossing detection axes detecting the ... | 09/30/2008 |
| 7406868 | Compensating accelerometer with optical angle sensing A compensating accelerometer includes a housing, and a sensing element mounted in the housing. The sensing element includes a pendulum flexibly mounted on a base. The sensing element includes a coil mounted on a movable plate, a curtain having a slit, and a load mas... | 08/05/2008 |
| 7406883 | Compact device for measuring the speed and the direction of rotation of an object The invention concerns a device for measuring the speed and direction of rotation of an object (3) near to which it is placed. It comprises: a magnetic detection device (2) that delivers, in response to a rotation of ... | 08/05/2008 |
| 7337668 | Accelerometer in closed loop with error detection An accelerometric measurement device with a return loop including accelerometer, a corrector generating a signal for correction of the position of the accelerometer, a closed return loop to apply this correction signal to the accelerometer, a detector to detect an e... | 03/04/2008 |
| 7293459 | Image-based sensing of acceleration A system includes a support, a pendular element, an elastic restraint, an image sensor, and a processing system. The elastic restraint couples the pendular element to the support and applies to the pendular element a restraining force that opposes movement of the pe... | 11/13/2007 |
| 7237446 | System and method for measuring gait kinematics information A system for measuring gait kinematics information during exercise of a subject comprising a fixing member adapted for fixing onto the trunk of the body of the subject; an acceleration sensor attached to the fixing member for sensing the vertical acceleration of the... | 07/03/2007 |
| 7073381 | Rotation control sensor Rotation-monitoring detector comprising a binary output signal and a signaling LED, and including a frequency operating mode in which the state of the output signal and of the LED are a function of a passage frequency of a target in front of the detector. The detect... | 07/11/2006 |
| 6934662 | MEMS based tilt sensor A sensor system is mounted on a host for recording motion of the host over time. The sensor system includes a sensor pad having a surface with a positive slope away from a center of the surface, and a mass resting on the sensor pad. The sensor pad includes an array ... | 08/23/2005 |
| 6542847 | Sensor system for detecting movements The present invention describes a sensor assembly for detecting movements, wherein a sensor signal is produced in an active sensor (1) by an encoder (E) acted upon by the movement, and which includes a first device (2, 3, 4, 5) that permits converting the... | 04/01/2003 |
| 6109102 | System for superimposing data A system for superimposing data in which data are represented by a constituted analog signal. The analog signal periodically has two presettable levels (high, low), with the data being represented with the time duration of the analog signal. The presettab... | 08/29/2000 |
| 5801301 | Operating condition detecting system for automotive vehicle An operation condition detecting system for an automobile vehicle includes a fifth wheel rotatably connected to a shaft protruding downward from the bottom center of an automobile chassis. A first sensor is installed around the fifth wheel's axle to measu... | 09/01/1998 |
| 5739431 | Miniature magnetometer-accelerometer A magnetometer is integrated with a miniature vibrating beam accelerometer fabricated out of silicon on a common substrate. Dual pendulum-DETF force sensing accelerometers have integrated conductor coils on the pendulums that circulate alternating current... | 04/14/1998 |
| 5569848 | System, method and apparatus for monitoring tire inflation pressure in a vehicle tire and wheel assembly A system, method and apparatus for use on vehicles having road wheels with pneumatic tires that includes sensors that produce signals that are a measure of the rotational speed of said wheels, indicators arranged to provide information to the driver of th... | 10/29/1996 |
| 5554981 | Capacitive number wheel encoder for utility meters A number wheel assembly (10) for a counter mechanism has a plurality of number wheels (13-18), each number wheel (13-18) having a sleeve (48) around its circumference with a plurality of positions representing successive increments in a count, a substrate... | 09/10/1996 |
| 5353644 | Method and system for evaluating a signal from a vibrationally-sensitive pressure sensor in a motor vehicle The signal from a vibrationally-sensitive pressure sensor is both low-pass filtered and band-pass filtered. The low-pass-filtered portion is employed as a pressure-measuring signal, while the band-pass filtered portion is used as an acceleration-measuring... | 10/11/1994 |
| 5351540 | Grade angle and acceleration sensor A grade and acceleration sensor having a weight, a first sensor for measuring a first parameter of the weight due at least to the force of gravity to generate a first signal, a second sensor for measuring a second parameter of the weight due to both the f... | 10/04/1994 |
| 5068640 | Method of operating a safety device for vehicle occupants A safety device for vehicle occupants has an operational voltage source, typically the vehicle's battery, and a storage device for electrical energy, typically a capacitor. Several tripping devices, typically ignition tablets, are coupled to the storage d... | 11/26/1991 |
| 4869106 | Governor checkout apparatus and method An overspeed governor for adjusting the blade pitch of a propulsor in an unducted fan aircraft engine to prevent propulsor overspeed comprises a flyweight governor which is rotated in response to rotation of the propulsor, a governor pilot valve with a va... | 09/26/1989 |
| 4862394 | Drop height recorder A drop height recorder apparatus includes a housing suitable for packaging for shipment from an origin point to a destination point, a triaxial accelerometer provides three signals to corresponding high gain and low gain channels. The three high gain chan... | 08/29/1989 |
| 4821218 | Method and apparatus for determining at least one characteristic value of movement of a body With the apparatus of the invention, any acceleration/deceleration in the direction of movement is sensed by a pendulum. Electrical signals derived therefrom are used for solving the differential equation of oscillation of the pendulum for determining the... | 04/11/1989 |
| 4784237 | Apparatus for automatic release of passenger protection devices in the event of an accident An apparatus for the automatic release of passenger protection devices in motor vehicles in the event of an accident has a sensor (35) having a mass (10) secured outside the center of mass (11). This mass (10) generates a comparably high torque in the sus... | 11/15/1988 |
| 4493218 | Transducer system employing a spring with linear characteristics Apparatus indicating the linear movement of a member includes a pulley and a spring disposed on the pulley and having characteristics of producing a force substantially linearly related to its speed of movement with respect to the pulley. A motor produces... | 01/15/1985 |
| 4393709 | Direction detection apparatus A direction detection apparatus which detects the traveling direction of a moving object on the basis of the movement of a weight. It comprises a centrifugal force detector, a clock signal generator, and a velocity detector, and also a detection device wh... | 07/19/1983 |
| 4319488 | Accelerometer The technique for replacing certain components in a linear accelerometer with an arrangement compatible with all of the other components making up the accelerometer is disclosed herein. The components that are replaced include a potentiometer and mechanic... | 03/16/1982 |
| 4300200 | Helicopter airspeed indicating system This invention provides a helicopter airspeed indicating system for providing an indication of a theoretical airspeed of a helicopter in which it is fitted. The airspeed is calculated using measured weight and power values and a known relationship between... | 11/10/1981 |
| 4237736 | Impact gauge Upon impact, a ball is released and radially displaced into an annular space of decreasing thickness. Simultaneously, the ball releases a fluid to an absorbent material. The direction and distance of displacement indicate the direction and magnitude of th... | 12/09/1980 |
| 4223556 | Body motion compensation filter A filter for use in determining the vertical displacement of a body travelling through water relative to a datum such as mean sea level, and having specific application to underwater seismic systems in which a towed body forms a part of equipment for prod... | 09/23/1980 |
| 4114450 | Electronic recording accelerometer A self-contained and internally powered shock, temperature and relative humidity acquisition and recording device particularly adapted for the rapid, accurate and automatic analysis of material handling and transportation facilities and procedures. The ap... | 09/19/1978 |
| 4109534 | Apparatus for monitoring acceleration There is disclosed an apparatus for monitoring acceleration of a body which utilizes liquid flow technology thus avoiding the need for electrical power. The apparatus includes steel balls of predetermined mass (hereafter "proof masses") disposed in annula... | 08/29/1978 |
| 4095551 | Indicating arrangement for a distance warning installation in motor vehicles An indicating arrangement for a distance warning system in motor vehicles which are equipped with measuring and evaluating devices for determining the distance of the vehicle to an obstacle disposed in front thereof and for determining the approach veloci... | 06/20/1978 |
| 4075892 | Indicating arrangement for a distance warning installation A distance-warning system in motor vehicles which is equipped with measuring and evaluating devices for determining the distance of the vehicle with respect to an obstacle disposed in front thereof and for determining the approach velocity to this obstacl... | 02/28/1978 |
