99results about "Speed measurement using acceleration" patented technology

Systems and methods for deactivating one-touch turn signals as a function of vehicle traversal velocity are provided. The method may comprise, using a computing device comprising a processor and a memory, determining, using a turn signal switch, whether a turn signal of a vehicle is activated, determining whether a lane crossing is detected, and, when a lane crossing is detected, calculating a vehicle traversal velocity, comparing the traversal velocity to a first threshold, and, when the traversal velocity is less than the first threshold, deactivating the turn signal when an elapsed time is greater than a second threshold.

The invention relates to a method for determining the tire circumference (U) of at least one vehicle wheel of a vehicle (1). The invention provides that, during a journey of the vehicle (1) at a constant speed (v) of the vehicle (1), a first relative speed (Δv) of the vehicle (1) to a stationary object (4) is determined and stored as a direct value or indirectly via a characteristic value (sF) and this characteristic value (sF) is stored, and simultaneously a wheel characteristic value (nR, A) of the at least one vehicle wheel is determined and stored.The current value of the tire circumference (U) of at least one vehicle wheel of the vehicle (1) is derived from the stored value of the first relative speed (Δv) to the stationary object (4) and the stored value of a first wheel parameter (nR) or from the stored value of the parameter (sF) for the stationary object (4) and the stored value of a second wheel parameter (A).

In a method for calculating, by an estimator, an instantaneous velocity vector {right arrow over (Vu)} of a rail vehicle, the estimator receives measurements from an inertial unit at a fixed point in the vehicle body and determines a mathematical model M of the dynamics of the vehicle moving on a track, the model being dependent on the bias of the inertial unit and installation parameters, a virtual sensor is determined based on the model M, the virtual sensor enabling calculation, from model parameters, two theoretical transverse velocities δvy<sub2>c< / sub2>, and δvz<sub2>c < / sub2>along axes yc and zc, respectively. An iterative estimator calculates {right arrow over (Vu)}, and includes the virtual sensor, the estimator being configured so the two theoretical transverse velocities are zero regardless of the rail configurations, the estimator enabling correction of the biases of the inertial unit and estimate installation parameters. Auxiliary velocity or distance travelled sensors are not used to calculate {right arrow over (Vu)}.

A system is provided for providing real-time feedback to an operator upon detecting unacceptable motion. The system includes a wearable device with a housing worn by the operator, a memory device, a sensor configured to output motion signals corresponding to motion of the operator, an output device configured to output operator alerts in response to a determination of unacceptable motion of the operator, and a processor configured to receive a plurality of the output motion signals at a sampling rate, convert the output motion signals into a plurality of data points, analyze the data points to identify steps taken by the operator, compute a step rate of the operator based upon the identified steps, and cause the output device to output an operator alert in response to the step rate exceeding a predetermined rate threshold corresponding to unacceptable motion of the operator.

The invention relates to a method for estimating the speed of a rail vehicle (100) comprising an inertial measurement unit (1) that is configured to receive GNSS signals that are associated with a satellite navigation system, comprising the following steps: —analyzing (1031) the received GNSS signals to determine the reliability of these GNSS signals; —a step of defining a measurement vector comprising the measurements taken by the initial measurement unit; —defining a state vector comprising components that are associated with the speed of the vehicle, with the attitude of the vehicle and with the bias errors in the angular velocity and acceleration measurements; —applying (1035) a state estimator to estimate the state vector using the measurement vector; —correcting the estimate of the state vector on the basis of the GNSS signals depending on the determined reliability of these GNSS signals; —extracting the speed of the rail vehicle and the error associated with the speed of the rail vehicle (100) from the corrected state vector.

A processing system includes: an acquisition unit, an arithmetic unit, an output unit. The acquisition unit that acquires first vibration information of a first channel and second vibration information of a second channel about vibration of an object. The arithmetic unit that calculates a spectrogram including at least one of a cross-power spectrogram, a cross-phase spectrogram, and a coherence spectrogram of the first vibration information and the second vibration information. The output unit that outputs presentation information on at least one of condition monitoring, quality control, and predictive maintenance of the object, based on the spectrogram.

The invention relates to a method for identifying a wheel to which each tire pressure detector belongs. The method comprises the following steps of: calculating a rotating speed value of a corresponding wheel by each tire pressure detector; the automobile electronic control unit reads the information of the ABS gear of each wheel; each tire pressure detector sets the same target angle position, calculates the time value required for reaching the target angle position according to the rotating speed value of the corresponding wheel, and wirelessly transmits a packet of the calculated time value to the automobile electronic control unit; and according to the time values transmitted by the tire pressure detectors, when the time value transmitted by any tire pressure detector arrives, the automobile electronic control unit reads the corresponding tooth value of the ABS gear of each wheel and the target angle position, and operates the numerical control unit to identify the wheel to which each tire pressure detector belongs.

To provide a measurement method that can accurately estimate the amplitude of displacement of a structure when a movable body moves on the structure.SOLUTION: A measurement method includes: an acceleration data acquisition step of acquiring acceleration data output from accelerometers that observe observation points of a structure when a first movable body moves on the structure; a speed vibration component calculation step of performing integration processing and filter processing of acceleration based on the acceleration data to calculate a first speed vibration component; and a displacement amplitude estimation step of estimating the amplitude of displacement of the structure when the first movable body moves on the structure on the basis of the first speed vibration component and a transfer function calculated in advance on the basis of displacement data output from displacement meters that observe the observation points when a second movable body moves on the structure.SELECTED DRAWING: Figure 14

The present disclosure relates to methods, apparatuses, devices, and program products for measuring speed. The method comprises acquiring, from a pressure sensor of an electronic device, first pressure information of the electronic device at a first moment when the electronic device is in a stationary state. The method further comprises acquiring, from the pressure sensor, second pressure information of the electronic device at a second moment when the electronic device is in a moving state. The method further comprises acquiring, from an acceleration sensor of the electronic device, acceleration information of the electronic device. In addition, the method comprises determining, based on the first pressure information, the second pressure information, and the acceleration information, an absolute speed of the electronic device at the second moment. By means of the method disclosed herein, the absolute speed of the electronic device can be accurately measured based on the pressure sensor and the acceleration sensor of the electronic device, thereby making the speed measurement more accurate and simple.

A monitoring system for a speed determination system in an aircraft is disclosed. A method, which may be implemented by a computer program, of monitoring a speed determination system for an aircraft is also disclosed. The speed determination system includes a first speed measurement system and a second speed measurement system and the second speed measurement system is associated with a predetermined behaviour characteristic. The monitoring system includes a processor arranged to receive speed data provided by the speed determination system and to perform a correspondence determination process comprising processing the received speed data to determine whether a correspondence condition is satisfied, the correspondence condition having a correspondence between the received speed data and the predetermined behaviour characteristic of the second speed measurement system. In response to determining that the correspondence condition is satisfied, determine that the first speed measurement system is in an error condition.

The invention provides a wheel speed measuring method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the filtering of acceleration data for each piece of acceleration data in a plurality of pieces of acceleration data, and determining the filtered acceleration data as acceleration filtering data; determining a first direction fundamental frequency and a phase of a first direction fundamental frequency signal of the target wheel in a preset time period and a second direction fundamental frequency and a phase of a second direction fundamental frequency signal of the target wheel in the preset time period according to the plurality of acceleration filtering data; and determining the wheel speed of the target wheel based on the first direction fundamental frequency, the phase of the first direction fundamental frequency signal, the second direction fundamental frequency and the phase of the second direction fundamental frequency signal. By adopting the technical scheme provided by the invention, the accuracy of wheel speed estimation is improved, the influence of non-uniform motion and vibration noise of the vehicle is effectively inhibited, and meanwhile, the complexity of a navigation system is reduced.

In order to ascertain the speed value, at least a first and a second sensor variable, which represent the movement of a wheel of the vehicle, are detected by means of a sensor, for example a magnetic field sensor. The speed value is ascertained from the time interval between the first and second sensor variables. For this purpose, the sensor variables or the detected sensor values are each compared with a first threshold value, wherein the time interval between the respective overshooting of the threshold value is ascertained. The core of the invention here is that a locomotion variable, which represents the movement of the vehicle in the direction of travel or longitudinal direction, is detected by means of a second sensor, for example an acceleration sensor or an inertial sensor. On the basis of this locomotion variable, a time period within which the first threshold value is expected to be overshot by the second sensor variable after the first threshold value has been overshot by the first sensor variable is derived. If the situation of the first threshold value having been overshot by the second sensor variable has not been identified after the time period has elapsed, a second threshold value, which is lower than the first threshold value, is defined. This lower second threshold value is used in the following process of ascertaining the speed value when determining the time interval between the first and the second sensor variable and in particular for the comparison. If the reduced threshold value is not overshot either, the threshold value can continue to be reduced in steps until the signal reliably overshoots the threshold value.

To provide a speed calculation device that can accurately calculate speed corresponding to the movement of an electronic device.SOLUTION: A speed calculation device 100 according to the present disclosure comprises a sensor information acquisition unit 111, a speed estimation unit 112, an average speed calculation unit 113, a relationship information calculation unit 114, and a speed-determining unit 115. The sensor information acquisition unit 111 acquires, from an acceleration sensor, sensor information relating to acceleration regarding an electronic device. The speed estimation unit 112 calculates, on the basis of the sensor information, an estimated speed estimated with respect to the movement of the electronic device. The average speed calculation unit 113 performs filtering and integration on the sensor information and calculates an average speed corresponding to the movement of the electronic device. The relationship information calculation unit 114 calculates relationship information indicating the correspondence relationship between the estimated speed and the average speed. The speed-determining unit 115 determines the speed corresponding to the current movement of the electronic device on the basis of the relationship information and the current estimated speed calculated by the speed estimation unit.SELECTED DRAWING: Figure 3

The invention relates to a method, an apparatus, a device and a program product for measuring speed. The method comprises the following steps: acquiring first pressure intensity information of the electronic equipment at a first moment when the electronic equipment is in a static state from a pressure intensity sensor of the electronic equipment; the method further comprises the step of obtaining second pressure intensity information of the electronic equipment at the second moment when the electronic equipment is in the motion state from the pressure intensity sensor. The method further includes acquiring acceleration information of the electronic device from an acceleration sensor of the electronic device. In addition, the method further comprises the step of determining the absolute speed of the electronic equipment at the second moment based on the first pressure intensity information, the second pressure intensity information and the acceleration information. Through the method disclosed by the invention, the absolute speed of the electronic equipment can be accurately measured based on the pressure sensor and the acceleration sensor of the electronic equipment, so that the speed measurement is more accurate and simpler.

A sensor data acquisition unit 214 acquires sensor data indicating an acceleration of a device including a vibrator. A second estimation processing unit 250 estimates a speed of the device on the basis of the sensor data. A vibration determination unit 262 determines whether or not the vibrator is vibrating on the basis of the sensor data. A stationary determination unit 264 determines whether or not the device is stationary on the basis of the sensor data. A second estimation processing unit 250 reduces the estimated speed of the device in a case where it is determined that the vibrator is vibrating and the device is stationary.

The invention relates to a method for limiting baro-inertial vertical speed correction, baro-inertial vertical speed being calculated by a baro-inertial loop implemented by a processor included in an airborne system further comprising an accelerometer and a barometric altimeter, the loop taking a vertical acceleration and a barometric altitude as input and being configured so as: - to provide at least one altitude and the vertical speed; - to correct the altitude and the vertical speed on the basis of the barometric altitude, a position correction gain, a vertical speed correction gain and a vertical acceleration correction gain. The method comprises a step of limiting vertical speed correction when the absolute value of the difference between the barometric altitude and the altitude exceeds a predetermined threshold, said step of limiting vertical speed correction comprising modification of the position correction gain.

A luggage tag comprising: a means for coupling the luggage tag to a piece of luggage; a computer processor; a memory in communication with the computer processor, the memory storing inertial data; and at least one sensor that captures the inertial data of the motion of the luggage in response to an external stimuli and outputs the inertial data to the memory, wherein the computer processor determines a mass of the luggage from the captured inertial data.

To reduce errors in positional measurement caused by accumulation of minute errors.SOLUTION: A position measuring apparatus 1 includes: a sensor 11 for measuring one of the acceleration and the angular velocity of a valve stem of an ON-OFF valve 200; a position information generation unit 12 for integrating one of the acceleration and the angular velocity measured by the sensor 11 and converting the integrated one of the acceleration and the angular velocity into position information; a sensor 13 for detecting mechanical vibration generated in association with opening and closing of the ON-OFF valve 200; a reference position definition unit 14 configured to store, in advance, as reference position information, position information corresponding to a time when vibration is detected by the sensor 13; and a calibration processing unit 15 for performing a calibration process for reducing position measurement errors on the basis of the position information obtained by the position information generation unit 12 and the reference position information when vibration is detected by the sensor 13.SELECTED DRAWING: Figure 1

A sensor (1) for detecting the position of a mechanical component within a polar-sphere coordinate reference frame (S1), comprising the following housed inside a sensor body (4) of the sensor (1): a linear position sensor (6, 3) configured to detect a first linear coordinate (rho) of the position of a free end (P) of a slider (2) within the polar-sphere coordinate reference frame (S1); an acceleration sensor (7); an angular velocity sensor (7); a data processing unit (9) configured to determine a second remainder latitude coordinate # imgabs0 # and a third longitude coordinate (theta) of the position based on acceleration and angular velocity values detectable by the sensor (7); a plurality of sets of three detected polar sphere coordinates representing the path of travel of the free end (P) of the slider (2) in the reference frame (S1) are stored in a memory unit.

An equipment fitting system that measures swings by a user of different pieces of equipment with inertial sensors, and analyzes sensor data to recommend which piece of equipment is optimal for the user from among those tested. Illustrative applications include fitting of baseball bats and golf clubs. Swing metrics calculated from sensor data may include an acceleration metric, a speed metric, and a momentum metric; these metrics may be combined into a metrics score for each piece of equipment. Other factors may be included in an overall score, such as the user's subjective score for each piece of equipment, and ratings from experts or other consumers. Users may assign the relative importance for the different factors to calculate an overall equipment score.

An electronic tag coupled to a piece of luggage comprising a computer processor, a memory in communication with the computer processor, the memory storing inertial data; and at least one sensor that captures the inertial data of the motion of the luggage in response to an external stimuli and outputs the inertial data to the memory, wherein the computer processor determines a mass of the luggage from the captured inertial data.

A power meter may determine pedaling cadence using acceleration data from the accelerometer. When the power meter determines a first condition indicative that quality of the cadence is below a desired level, the power meter activates the gyroscope and determines the cadence using rotational data from the gyroscope. When the power meter subsequently determines that the first condition no longer remains, the power meter deactivates the gyroscope and determines the cadence using the acceleration data from the accelerometer.

A vehicle speed estimation device is configured to calculate a first vehicle speed of a vehicle based on a wheel speed sensor, calculate a second vehicle speed of the vehicle based on a signal from a positioning satellite, estimate a scale factor corresponding to the first vehicle speed, based on a ratio of the second vehicle speed to the first vehicle speed and a relationship with the first vehicle speed, and estimate an actual vehicle speed of the vehicle by multiplying the first vehicle speed by the scale factor.

A method described and device to rapidly detect the accident-related removal of a mobile user terminal from a holder and to generate corresponding information which characterizes the fall or crash related to the accident. Rotation-rate sensor variables and acceleration variables of the mobile user terminal are acquired. A rotation or twisting of the mobile user terminal is detected in that the currently acquired and / or integrated rotation-rate sensor variables are compared to past values and / or threshold values. A movement of the mobile user terminal is detected on the basis of the currently acquired and / or integrated acceleration variables. A comparison with past values and / or threshold values may optionally also be carried out. The determination of an in particular accident-related crash of the vehicle and / or the fall of the mobile user terminal out of the holder then takes place due to the detected rotation and the detected movement.

A servo-type vibration detector and a vibration control device are provided. A movable member coupled to a displacement detector is disposed with a gap relative to a fixed member having a coil fixed thereto. By disposing the coil in a closed magnetic circuit formed by a permanent magnet, the movable member, and the fixed member, a Lorentz force is generated that moves the movable member in an axial direction.

The invention provides a measurement method, a measurement device, a measurement system, and a measurement program product, which can reduce drift generated by integration processing of data based on observation data when a railway vehicle travels on a bridge. A measurement method includes: an observation data acquisition step in which observation data including a response to an action of a railway vehicle traveling on a bridge on an observation point, which is output from an observation device that observes the observation point of the bridge, is acquired; a fundamental frequency calculation step for calculating, from first measurement data based on the observation data, a fundamental frequency of deflection repeatedly generated on the bridge due to the travel of the railway vehicle; a filter processing step for generating second measurement data by performing filter processing on the first measurement data using a filter in which a passband is variably set in accordance with the fundamental frequency; and an integration processing step for performing integration processing on the second measurement data to generate third measurement data.

An air mobility includes a global navigation satellite system (GNSS) receiver, an antenna array, and a controller electrically connected to the GNSS receiver and the antenna array. The controller is configured to identify a first location of the air mobility including an altitude of the air mobility based on an output of the GNSS receiver, identify a first relative direction of facing a communication target with respect to the first location of the air mobility, control the antenna array so that a wireless signal by the antenna array is deflected in the first relative direction, predict a second relative direction of facing the communication target based on a movement of the air mobility, and control the antenna array so that the wireless signal by the antenna array is deflected in the second relative direction.

A method for limiting baro-inertial vertical speed correction, baro-inertial vertical speed being calculated by a baro-inertial loop implemented by a processor included in an airborne system further including an accelerometer and a barometric altimeter, the loop taking a vertical acceleration and a barometric altitude as input and being configured so as: to provide at least one altitude and the vertical speed; to correct the altitude and the vertical speed on the basis of the barometric altitude, a position correction gain, a vertical speed correction gain and a vertical acceleration correction gain. The method includes limiting vertical speed correction when the absolute value of the difference between the barometric altitude and the altitude exceeds a predetermined threshold, the limiting vertical speed correction including modification of the position correction gain.