23results 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 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.

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 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.

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 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.

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.

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.

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 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 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.

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 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.

The application discloses a multi-modal fusion-based inter-device ranging and positioning system, which comprises a ranging module and a joint positioning module. The ranging module comprises a single-modal ranging unit and a real-time distance fusion unit, and is used for obtaining a predicted distance through a first Kalman filter based on low-frequency absolute distance and high-frequency relative displacement and speed. The joint positioning module is used for taking the predicted distance as a side constraint and reconstructing the relative position topology of nodes. The implementation of the application can realize corresponding ranging processing based on existing commercial devices and corresponding sensing and communication capabilities, and is easy to land in a real multi-device ecosystem. In addition, the improved double-Kalman filter multi-modal signal fusion scheme solves the synchronization problem between heterogeneous sensor signals. In addition, the application can be extended to multi-device joint positioning and topology reconstruction, so that more stable overall spatial relationship inference results can be obtained.

The invention relates to a method for ascertaining the speed of a pedal cycle, in particular a bicycle or tricycle in the form of a pedelec, the speed of the pedal cycle being ascertained on the basis of a primary signal which is provided by means of a primary signal device. Preferably, the primary signal is a pulsed signal which is generated by a reed contact or a magnetic field sensor and a magnet secured to a wheel. In the event of a disturbance of the primary signal, for example in the event of faulty pulses, the following steps are to be carried out: - providing at least two substitute signals for the speed of the pedal cycle, for example by means of an acceleration sensor, a cadence sensor, or a motor rotational speed sensor, - calculating a trust parameter for the at least two substitute signals, wherein the trust parameter represents the quality of each substitute signal with respect to the representation of the current speed of the pedal cycle, and - ascertaining the speed of the pedal cycle on the basis of the substitute signal with the higher trust parameter.

The application relates to the field of rotary imaging, in particular to a rotary imaging system and method of a rotary device and the rotary device. The rotary imaging system of the rotary device comprises a rotary main body with a lamp strip module; a circuit board arranged on the rotary main body, the circuit board rotates synchronously with the rotary main body; an acceleration detection assembly arranged at a predetermined position on the circuit board, used for acquiring acceleration detection data of the predetermined position when the circuit board rotates; and a control module, which obtains an acceleration value of the predetermined position based on the acceleration detection data, further obtains a rotating speed value of the circuit board based on the acceleration value and a position parameter corresponding to the predetermined position, and drives the lamp strip module to realize rotary imaging based on the rotating speed value. The application can quickly calculate the instantaneous rotating speed of the rotary device based on the detection data of the accelerometer, and has extremely high response speed.

Examples of the present disclosure describe systems and methods for presenting virtual content on a wearable head device. In some embodiments, a state of the wearable head device is determined by minimizing a total error based on a reduced weight associated with a reprojection error. A view reflecting the determined state of the wearable head device is presented via a display of the wearable head device. In some embodiments, based on image data received via a sensor of the wearable head device and inertial data received via a first IMU and a second IMU of the wearable head device, the wearable head device computes a first pre-integration term and a second pre-integration term. Based on the first and second pre-integration terms, the wearable head device estimates a position of the device, and based on the position of the device, the wearable head device presents virtual content.

A system for providing real-time feedback to an operator when unacceptable motion is detected is provided. The system includes a wearable device having a housing to be worn by an operator, a memory device, a sensor configured to output a motion signal corresponding to motion of the operator, an output device configured to output an operator alert in response to a determination of unacceptable motion of the operator, and a processor configured to: receive a plurality of output motion signals at a sampling rate; convert the output motion signals into a plurality of data points; analyze the data points to identify a pace at which the operator is walking; calculate a pace rate of the operator based on the identified pace; and cause the output device to output the operator alert in response to the pace rate exceeding a predetermined rate threshold corresponding to unacceptable motion of the operator.

To reduce influence of a zero-point error of an acceleration sensor to improve speed / position calculation accuracy in a low-speed range.SOLUTION: A speed / position calculation device is mounted on a railway vehicle and calculates a speed and a position of the railway vehicle. The speed / position calculation device includes: an acceleration difference calculation unit, which, while the railway vehicle is traveling in a traveling area in which a gradient can be regarded as constant, calculates an acceleration difference between an acceleration based on measurement data of an acceleration sensor mounted on the railway vehicle and an acceleration difference which is a difference from an acceleration obtained by differentiating a speed calculated based on an output of a tachometer generator; an acceleration correction part which corrects the measured acceleration of the acceleration sensor on the basis of the calculated acceleration difference; and an acceleration integrated speed calculation unit which integrates the corrected acceleration to calculate the speed in a predetermined low-speed region where the output of the tachometer generator becomes unstable.SELECTED DRAWING: Figure 1