502results about "Speed measurement using acceleration" patented technology

A movement measuring device determines the speed of the body's specific movement on the basis of the maximum value of the acceleration sensed by an acceleration sensing unit attached to the body, when the body has made a specific movement. For example, when the player wears the device on his arm and makes a punching motion, the punching speed is found from the maximum acceleration resulting from the punching action. Furthermore, a game device obtains data indicating the magnitude of a specific movement of the body, on the basis of the acceleration sensed by an acceleration sensing unit, and then decides the outcome of the game on the basis of the strength and weakness of the punch. This enables the user to easily play a fighting sport game involving the player's actual punching motions anywhere.

A movement detecting device comprises a container (10), at least a first vibrator (16) which vibrates in accordance with a physical movement in a first direction (X), and a second vibrator (17) which vibrates about a second direction (Z), the first and second vibrators mounted in the container. The vibrations of the first and second vibrators are converted into an electric signal, and a value of the converted signal is shown on a display.

Disclosed herein is an improved input device for a processing system, such as, for example a computer system; and an improved method for operating that input device. The system monitors at least one indicia, such as an operating parameter of the input device, where the operating parameter has a first characteristic when the input device is in one operating position or state, but where are the operating parameter has a second characteristic when the input device is in another position or state. In one example, the operating parameter includes generally vertical movement of the input device. In other embodiments, other operating parameters may be relied upon.

A portable apparatus including an interface configured to input first motion data of a user from a foot-worn first self-contained activity determining unit is disclosed. The portable apparatus also includes a second self-contained activity determining unit configured to determine second motion data of the user. Furthermore, the portable apparatus includes a processing unit configured to determine and store a user-specific dependency between the first motion data and the second motion data, and determine a current speed of the user or a current traveled distance of the user based on current second motion data and the user-specific dependency.

As an embodiment of the present invention, in a navigation system using an acceleration sensor, when position information cannot be obtained from a GPS processing section, a velocity detecting unit performs an operation using detected acceleration αG, a measurement time mt, a velocity V0 at a time t0, gravity acceleration g and an amount of height change Dh, according to Expression (11). By using the relationship among a gravity acceleration component gf, the gravity acceleration g, the amount of height change Dh and distance Dm shown in Expression (4), the gravity acceleration component gf can be offset by the amount of height change Dh. Therefore, velocity V can be calculated with high accuracy without receiving the effect of the gravity acceleration component gf.

The invention relates to devices and methods for monitoring one or more athletic performance characteristic of a user. An example apparatus includes a sensing unit adapted to be attachable to a shoe of a user, the sensing unit including a first sensor adapted to monitor an movement of a foot of the user while the user is in motion, the first sensor comprising a gyroscopic sensor, processing means for determining a first performance characteristic of the user based upon an output from the first sensor, the first performance characteristic comprising a foot strike location of a foot of the user upon striking a ground surface, and transmitting means for transmitting a data package representative of the performance characteristic to a remote receiver.

Sensors detects loft time, speed, power and / or drop distance of a vehicle and / or person. The sensors couple with multiple persons during athletic activity. Data from the sensors downloads to a database so that users may compare athletic performances (e.g., speed) between the persons, such as through the Internet.

The invention detects the loft time, speed, power and / or drop distance of a vehicle, such as a sporting vehicle, during activities of moving and jumping. A loft sensor detects when the vehicle leaves the ground and when the vehicle returns to the ground. A controller subsystem converts the sensed information to determine a loft time. A display shows the recorded loft time to a user of the system. In addition, a speed sensor can detect the vehicle's speed for selective display to the user. A power sensing section informs the user of expended energy, which can be compared to other users. A drop distance sensing unit informs the user of the peak height of a jump, during an airtime. Gaming on the internet is facilitated to connect worldwide sport enthusiasts.

The invention detects loft time and / or speed of a vehicle and / or person during activities of moving and jumping. A loft sensor detects leaving the ground and returning to the ground. A microprocessor subsystem converts the sensed information to determine a loft time. A display shows the recorded loft time to a user of the system. A speed sensor can detect speed for selective display to the user, and height may also be determined during airtime.

An arrangement for disabling suitably equipped mobile devices senses at least one of: acceleration, jerk, velocity, position, orientation relative to a vehicle location trend, and orientation of a direction of motion. Position and orientation sensing elements are becoming increasingly prevalent in mobile devices, be they cell phones, smart phones, portable Internet devices, portable wireless devices, mobile Internet devices, Portable Navigation Devices (PND), iPhones, tablet computers, iPads, or Portable Digital Assistants (PDA). Although the operation of which while driving is illegal in many jurisdictions, mobile devices continue to be used by drivers of motor vehicles. Common perception is that it is dangerous to divide one's attention to activities other than the task of operating motor vehicles, while driving. The present invention discloses a device and method of exploiting intricacies of vehicle movement trends by processing to sufficient fidelity as to permit extraction an indication of location with respect to vehicle, of a navigating portable wireless device and temporarily disable. The disclosure teaches use of at least one of: acceleration, jerk, velocity with sufficient fidelity, and differentiation of position updates with sufficient fidelity.

A technique for calculating magnetic field information from a magnetic sensor employs a sensing unit containing the magnetic sensor and another sensor capable of providing a measure of change in orientation. The method includes sampling a magnetic field at points in time and sampling the other sensor at each point in time. The method then entails rotating to a common time instant the magnetic field samples using the orientation of the sensing unit estimated by means of the other sensing modality in order to eliminate variations between magnetic samples due to changes in orientation of the sensor unit within such time interval. The magnetic samples, corrected for the sensor rotation in such interval, are used to calculate magnetic field related information specific to the given time interval and the magnetic field related information is communicated to a receiver at a rate lower than the sample rate.

A system and method that utilizes information relating to vehicle damage information including damaged vehicle area information, crush depth of the damaged areas information, and vehicle component-by-component damage information to determine the relative velocities of vehicles involved in a collision. The change in velocity is estimated using a plurality of methods, and a determination is made as to which method provided a result that is likely to be more accurate, based on the damage information, and the types of vehicles involved. The results from each method may also be weighted and combined to provide a multi-method estimate of the closing velocity. The methods include using crash test data from one or more sources, estimating closing velocity based on the principals of conservation of momentum, and estimating closing velocity based on deformation energy resulting from the collision.

In a motion analysis device, a first detection section detects a first state of a shaft portion of sporting equipment using an output of an inertial sensor. The first state corresponds to, for example, a resting state. A second detection section detects a second state of the shaft portion of the sporting equipment using the output of the inertial sensor. The second state corresponds to, for example, an impact. The second detection section detects a relative rotational angle of the shaft portion having varied around an axis of the shaft portion from the first state.

A vehicle including a ground speed sensor arranged to detect the speed of travel of the vehicle on the ground and including a wave transmitter arranged to transmit waves toward the ground, a wave receiver arranged to received waves reflected from the ground and a processor coupled to the transmitter and receiver to determine the speed of travel based on the transmitted waves and received waves. The waves are transmitted in pulses or modulated such that the processor is able to determine the distance between a wave-transmission and reception point and the ground (by time of flight for ultrasonic and electromagnetic waves or phase difference-for electromagnetic waves) and the velocity of the vehicle (using Doppler analysis).

A control device includes a two-dimensional inertial system configured to measure an acceleration of the control device. A control circuit is coupled to the two-dimensional inertial system where the control circuit is configured to receive acceleration information for the acceleration measured by the two-dimensional inertial system. The control circuit is further configured to integrate the acceleration information to calculate the velocity of the control device and determine if the velocity of the control device becomes zero along one or both of the two dimensions for which the two-dimensional inertial system is configured to measure acceleration. The control circuit is further configured to correct a drift in the velocity if the control circuit determines that the velocity is zero along one or both of the two dimensions.

Systems and methods for measuring the speed and / or direction of a target such as a vehicle in a field of view. The speed of a vehicle is measured using distance measurements, phase measurements, or Doppler shift measurements using a single transducer side fire configured sensor. The speed of a vehicle can be measured using laterally spaced transducers in a side fire or off angle configuration and using a single transducer sensor in a forward fire configuration.

A system and method that utilizes information relating to vehicle damage information including damaged vehicle area information, crush depth of the damaged areas information, and vehicle component-by-component damage information to estimate the relative velocities of vehicles involved in a collision. The change in velocity is estimated using a plurality of methods, and a determination is made as to which method provided a result that is likely to be more accurate, based on the damage information, and the types of vehicles involved. The results from each method may also be weighted and combined to provide a multi-method estimate of the closing velocity. The methods include using crash test data from one or more sources, estimating closing velocity based on the principals of conservation of momentum, and estimating closing velocity based on deformation energy resulting from the collision.

This invention allows for remote monitoring of the skier / skiing performance. The system consists of a various MEMS sensors embedded in skier clothing and equipment. These sensors measure instantaneous changes in acceleration in x / y / z axis and changes in earth magnetic field—relative to the skier position, to provide six degree of freedom in calculation of skier position as well as moments applied to the ski edge and forces experiences by the skier body. These sensors communicate with the monitoring application residing in the user wireless terminal (call phone) over the PAN wireless network. The instantaneous measurements are analyzed either locally or remotely and when the system is configured in an active mode, a corrective response to the MEMS actuators embedded in the ski or ski bindings may be send does changing the parameters of the run or provide enhanced safety.

Disclosed is a velocity estimator using a level crossing rate. The velocity estimator comprises a power calculator for calculating power values of a signal received from a mobile terminal; a mean power calculator for calculating mean power values for M power values according to a predetermined down-sampling factor M; an interpolator for interpolating the mean power values according to a predetermined interpolation ratio L; a root mean square calculator for calculating a root mean square value using an output of the interpolator; a level crossing counter for counting a level crossing frequency representing how many times the output of the interpolator crosses a level crossing threshold determined according to the root mean square value, for a predetermined time period; and a velocity calculator for calculating a velocity estimation value of the mobile terminal using the level crossing frequency.

A motion analysis method includes calculating a change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor, and identifying a maximum value of the amount of inertia during the swing to compare the maximum value and the amount of inertia at an impact with each other. A deceleration timing during the swing of the region (the grip of the sporting equipment) attached with the inertial sensor is identified, and the quality of the swing can be evaluated.

The invention relates to system and method of walking speed measurement and transmission and aims at providing a pedestrian gait detection-based system and a method of walking speed measurement and transmission. The system comprises an acceleration detection unit comprising a double-spindle acceleration sensor and peripheral circuits, an acceleration processing unit, a gait analysis unit, a speed analysis unit, a wireless communication emission unit, a wireless communication receiving unit and an output terminal. The speed detection system has the advantages of lower cost, convenient use and installation, basically no limitations in use, and better real-time performance and external interfaces in comparison with the prior art. Gait characteristics can be extracted from acceleration data during human movement so as to detect the instantaneous speed, the average speed, the displacement distance, the movement time of and the step number.

An adaptive vehicle control system that classifies a drivers driving style based on vehicle headway control. The system reads sensor signals to identify the range and range rate between a subject vehicle and a preceding vehicle, where the range rate is close to zero if the distance between the subject vehicle and the preceding vehicle is relatively steady, the range rate is negative when the subject vehicle is closing in on the preceding vehicle and the range rate is positive when the subject vehicle is falling behind the preceding vehicle. The range rate, the subject vehicle speed and other signals are used to classify the drivers driving style based on how fast the subject vehicle closes in on the preceding vehicle or falls behind, and the following distance between the subject vehicle and the preceding vehicle. The system can then classify the headway-control maneuver using selected discriminant features.

The invention provides an engineering nonlinear vibration inspection method. The method adopts a wavelet nonlinear threshold value filtering wave to filter wide-frequency background noise of a three-direction acceleration signal and to remove DC bias so as to get the treated acceleration signals after frequency domain filtering and removal of trend term. Then speed signals and displacement signals are obtained after the acceleration signals is subject to a first time and second time integrals and removal of trend term. The characteristics and types of the nonlinear vibration are determined through a three-dimensional phase space diagram and other calculations of a reconstructed phase space tested by the three-dimensional phase space diagram. The invention adopts three-direction low resistance piezoelectricity acceleration meter to measure the vibration accelerations of three orthogonal directions. The invention has convenient installation, easy usage and reliable analysis, overcomes the problems of drifting, delay and aberration of the actual acceleration signals after passing through analog integration or digital integration. The invention plays an important role in the engineering nonlinear vibration inspection for mechanical mechanisms, bridges, dams and buildings, etc.

An engine sound generation device adapted to an electric vehicle includes an engine speed calculation unit which calculates the virtual engine speed based on the motor revolution speed, vehicle speed, and acceleration opening. The engine speed calculation unit calculates the virtual engine speed with reference to the vehicle-dependent engine speed memory on the condition that the virtual engine speed is deemed proportional to the vehicle speed. In addition, the engine speed calculation unit calculates the virtual engine speed with reference to the vehicle-nondependent engine speed memory on the condition that the virtual engine speed is not deemed proportional to the vehicle speed, thus generating the common engine sound matching the behavior of an engine in a prescribed event such as the startup of the electric vehicle and the semi-engagement of a clutch.

The invention relates to devices and methods for monitoring one or more athletic performance characteristic of a user. An example apparatus includes a sensing unit adapted to be attachable to a shoe of a user, the sensing unit including a first sensor adapted to monitor an movement of a foot of the user while the user is in motion, the first sensor comprising a gyroscopic sensor, processing means for determining a first performance characteristic of the user based upon an output from the first sensor, the first performance characteristic comprising a foot strike location of a foot of the user upon striking a ground surface, and transmitting means for transmitting a data package representative of the performance characteristic to a remote receiver.

An apparatus is configured for inclusion in an arrow. In one embodiment, the apparatus includes a sensor configured to provide data concerning one or more flight characteristics of the arrow in flight and a communication link coupled to the sensor, the communication link configured to communicate the data to a device external to the arrow.

A motion analysis system includes first to N-th (N is an integer of 2 or more) sensor units which is attached to an object, an analysis unit which obtains a plurality of items of sampling data output from the sensor units, to analyze a motion of the object, a synchronization signal sending unit which transmits a first synchronization signal group including N first synchronization signals in order from the first to the N-th sensor unit, and transmits a second synchronization signal group including N second synchronization signals in order from the N-th to the first sensor unit, with respect to sensor unit, and a reference synchronization signal generation unit which generates a reference synchronization signal which is to be a reference with respect to the first to N-th sensor units, based on the first and second synchronization signal groups received by sensor unit.

Disclosed are an apparatus and a method for measuring the speed of a moving body using an accelerometer. A value of earth's gravitational acceleration component is detected from the measurements from the accelerometer and is removed from the acceleration value. Then, the acceleration value, after removal of the earth's gravitational acceleration component, is used to obtain the speed of the moving body. The earth's gravitational acceleration component is detected using a movement average at a point of time when the speed of the moving body is to be measured. By using the magnitude of a difference between a value obtained by removing an x-axis movement average from an x-axis measurement from the two-axis accelerometer and another value obtained by removing a y-axis movement average from a y-axis measurement from the two-axis accelerometer, it is possible to regulate a window for calculating the movement average and a weight value to each of the measurements included in the window. The present invention saves cost by reducing the number of expensive gyroscopes in implementing a speed measuring apparatus for vehicles. In addition, the speed measuring apparatus designed according to the present invention is superior to that designed according to the prior art in performance and improves the accuracy of position estimation in position estimation apparatuses for vehicles.