50results 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 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.

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.

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

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 implementing boxing motion analysis includes: obtaining, from an inertial measurement unit (IMU) on a user, acceleration data at a plurality of time instances within a time period; performing a dynamic adjustment operation on the acceleration data to obtain adjusted acceleration data; performing a signal cutting operation based on the adjusted acceleration data, three average acceleration values when the IMU is in a stationary state, and three threshold values, so as to obtain a plurality of time segments each associated with one swing motion; and performing, with respect to each of the time segments, a quaternion calculation, so as to obtain rotational acceleration data, performing a first integration operation and a second integration operation to obtain a plurality of locations of the IMU over the time segment, and obtaining a trajectory of the IMU in the time segment.

The invention provides a vehicle speed estimation device, a position calculation device, and a program capable of calculating the actual vehicle speed with high precision by correcting the speed of a vehicle calculated by a wheel speed sensor. The vehicle speed estimation device is provided with: a first vehicle speed calculation unit that calculates a first vehicle speed of a vehicle by means of a wheel speed sensor; a second vehicle speed calculation unit that calculates a second vehicle speed of the vehicle on the basis of a signal from the positioning satellite; a scale factor estimation unit that estimates a scale factor corresponding to the first vehicle speed on the basis of the relationship between the first vehicle speed and the ratio of the first vehicle speed to the second vehicle speed; and a vehicle speed estimation unit that estimates the actual vehicle speed of the vehicle by multiplying the first vehicle speed by the scale factor.

A sensor for detecting a position of a mechanical component within a polar spherical coordinate reference system, comprising, accommodated inside a sensor body of the sensor: a linear position sensor configured to detect a first linear coordinate of a position of a free end of a slider in the polar spherical coordinate reference system; an acceleration sensor; an angular speed sensor; a data processing unit configured to: determine a second colatitude coordinate and a third longitude coordinate of said position based on acceleration values and angular speed values detectable by said sensors; store in a memory unit a plurality of sets of three detected polar spherical coordinates representative of a path travelled by the free end of the slider in said reference system.

A position measuring device includes: a first sensor, measuring acceleration or angular velocity of a valve stem of an ON-OFF valve; a position information generation part, integrating the acceleration or angular velocity measured by the first sensor and converting the acceleration or angular velocity into position information; a second sensor, detecting mechanical vibration generated in association with opening and closing of the ON-OFF valve; a reference position specification part, pre-storing, as reference position information, position information when vibration is detected by the second sensor; and a calibration processing part, when vibration is detected by the second sensor, executing calibration processing to reduce position measurement errors based on the position information obtained by the position information generation part and the reference position information.

Systems and methods are disclosed herein for estimating at least one force acting upon a vehicle-mounted tire. An acceleration waveform (150) of the tire is detected in a tire radial direction from sampled outputs of a tire-mounted acceleration sensor (118). The acceleration waveform is integrated in the tire radial direction to generate a velocity waveform (step 220). A number of samples during ground contact are calculated from at least first and second peaks in the velocity waveform, wherein a ground contact length is calculated based on at least the calculated number of samples during ground contact, a sampling rate of the outputs of the tire-mounted acceleration sensor, and a velocity of the vehicle. At least one force acting on the tire is estimated from at least the calculated ground contact length (166), and an output signal is generated corresponding to the estimated at least one force acting on the tire.

Techniques and methodologies for servicing a shock strut are provided that account for the variability in gas solubility of the shock strut while in-service. These examples incorporates knowledge of the shock strut's stoke history in order to estimate / predict the amount of gas in solution, its percentage saturation, etc. This may permit a more refined knowledge of the true servicing state of the shock strut.

The invention relates to a method for controlling a vehicle, in particular a single-track vehicle such as an electric bicycle, comprising the steps: - measuring a speed of the vehicle at a plurality of points in time using the speed sensor, - measuring accelerations and / or angular rates of the vehicle in at least one direction, preferably in three directions, at the plurality of points in time, - determining a speed and / or a change in speed of the vehicle on the basis of the measured accelerations and / or angular rates at the plurality of points in time by means of a machine learning model, and - controlling the vehicle on the basis of a comparison of the measured speeds and the determined speeds and / or the determined change in speed at the plurality of points in time.

The embodiment of the invention provides a signal processing method and device, equipment and a medium. The method comprises the steps that an original acceleration signal, a preset acceleration change rate threshold value and a preset acceleration threshold value are acquired; correcting the original acceleration signal according to the acceleration change rate threshold and the acceleration threshold to obtain a target acceleration signal; integrating the original acceleration signal to obtain a first speed signal; inputting the target acceleration signal into a preset state-space equation to obtain a second speed signal; and obtaining a target speed signal according to the first speed signal and the second speed signal. According to the embodiment of the invention, the original acceleration signal is corrected, the integral drift phenomenon of the acceleration sensor during movement and the integral drift phenomenon of the acceleration sensor during static can be effectively reduced, and the target speed signal is obtained by combining the first speed signal and the second speed signal. Distortion of a speed signal at a low-frequency part can be avoided.

It is provided a method for determining a state of a door (15). The method is performed in a status determiner (1) based on accelerometer data of an accelerometer (18) that is fixed to the door (15). The method comprises: determining (40) that the door has transitioned from an open state (20) to a closing (21) state, based on a magnitude of a velocity of the door (15) in a first direction being greater than a closing velocity threshold (30); and determining (42) that the door has transitioned from a closing state (21) to an opening (23) state, based on a magnitude of a velocity of the door (15) in a second direction being greater than an opening velocity threshold (32), wherein the second direction is opposite from the first direction, wherein the opening velocity threshold (32) is based on an indication of position (29) of the door (15).

The invention provides a measurement method, a measurement device, a measurement system, and a measurement program product, which can calculate a travel speed function with high precision when a railway vehicle travels on a bridge while decelerating or accelerating. A measurement method includes: an observation data acquisition step of acquiring observation data output from an observation device; a passage time calculation step for calculating, on the basis of the observation data, a bridge entry time at which the railway vehicle enters one end of the bridge and a bridge exit time at which the railway vehicle leaves the other end of the bridge, and calculating, as a passage time, the time of the difference between the bridge exit time and the bridge entry time; and a travel speed function calculation step, the distance between the stop position of the railway vehicle and the position of the end portion of the bridge near the stop position, and the length between the front surface of the head vehicle of the railway vehicle and the head axle are determined based on the passing time, the traveling distance of the railway vehicle in the passing time, the distance between the stop position of the railway vehicle and the position of the end portion of the bridge near the stop position, and the length between the front surface of the head vehicle and the head axle. And calculating a running speed function when the railway vehicle runs on the bridge.

A measurement method includes: an observation data acquisition step of acquiring observation data output from an observation apparatus; a passing time calculation step of calculating, based on the observation data, an entry time when a railway vehicle enters one end of a bridge and an exit time when the railway vehicle exits another end, and calculating a time which is a difference between the exit time and the entry time as a passing time; and a traveling speed function calculation step of calculating a traveling speed function when the railway vehicle travels on the bridge based on the passing time, a traveling distance of the railway vehicle during the passing time, a distance between a stop position of the railway vehicle and a position of an end of the bridge closer to the stop position, and a length between a front surface of a leading car and a leading axle of the railway vehicle.

The method described and claimed below, as well as a device that carries out this method according to the invention, is designed to quickly detect the accidental displacement of a mobile device from a holder and to generate corresponding information that characterizes the fall or drop associated with the accident. To implement the method according to the invention, gyroscope and accelerometer readings from the mobile device are acquired. Rotation of the mobile device is detected by comparing the currently acquired and / or integrated gyroscope readings with past values ​​and / or threshold values. In a further step, movement of the mobile device is detected based on the currently acquired and / or integrated accelerometer readings.Optionally, a comparison with historical values ​​and / or threshold values ​​can also be performed. The detection of a vehicle fall, particularly due to an accident, and / or the mobile device falling from its mount is then based on the detected rotation and movement.