A method detects unintended acceleration of a motor vehicle during a closed-loop speed control mode by determining external forces on the vehicle via a controller, and then calculating a desired acceleration using a measured vehicle speed and the external forces. The method includes determining an actual acceleration of the vehicle, including filtering a speed signal as a first actual acceleration value and/or measuring a second actual acceleration value using an inertial measurement unit (IMU). During the speed control mode, the method includes calculating an acceleration delta value as a difference between the desired acceleration and the actual acceleration, and then using the acceleration delta value to detect the unintended acceleration during the speed control mode. A powertrain system for the motor vehicle, e.g., an electric vehicle, includes the controller and one or more torque generating devices coupled to road wheels of the vehicle.

An angular velocity detection device includes an angular velocity sensor configured to detect angular velocity, an acquisition unit configured to acquire orientation information in a three-dimensional space on a moving object including the angular velocity sensor, a calculation unit configured to calculate estimated angular velocity based on the acquired orientation information, and a correction unit configured to correct an output of the angular velocity sensor based on the angular velocity detected by the angular velocity sensor and the estimated angular velocity calculated by the calculation unit.

A tire revolution direction determination system includes a detection device arranged in each of two tires coupled back-to-back and a monitoring unit. The detection device includes a first detector that detects a first acceleration in a tire diameter direction and a second detector that detects a second acceleration in the tire diameter direction. The first detector is arranged in front of the second detector in a reference direction. When the monitoring unit receives the first acceleration and the second acceleration from the detection device while a vehicle travels forward, it specifies change over time of the first acceleration and change over time of the second acceleration and determines whether a direction of revolution of the tire where the detection device is arranged is the reference direction based on whether change over time of the first acceleration is more advanced than change over time of the second acceleration.

A method detects unintended acceleration of a motor vehicle during a closed-loop speed control mode by determining external forces on the vehicle via a controller, and then calculating a desired acceleration using a measured vehicle speed and the external forces. The method includes determining an actual acceleration of the vehicle, including filtering a speed signal as a first actual acceleration value and/or measuring a second actual acceleration value using an inertial measurement unit (IMU). During the speed control mode, the method includes calculating an acceleration delta value as a difference between the desired acceleration and the actual acceleration, and then using the acceleration delta value to detect the unintended acceleration during the speed control mode. A powertrain system for the motor vehicle, e.g., an electric vehicle, includes the controller and one or more torque generating devices coupled to road wheels of the vehicle.

An apparatus and method for measuring a structural angular acceleration based on dynamic centrifugal force measurement belong to the technical field of angular acceleration measurement. The apparatus has a solid ball. The solid ball can move freely along the radial direction of the outer wall packaging hood. The elastic block is used as a stress base. A rod for lateral limit and connection is used for connecting the rigid block and a pulley and limiting the displacement of solid ball so that the solid ball can only move longitudinally along the apparatus. The rigid block can move freely due to the pulley. Measurement of a transient angular acceleration is converted into dynamic measurement of the centrifugal force of the solid ball. Through the above design, the dynamic angular acceleration of the structure caused by dynamic load can be relatively accurately calculated.

Determining tread depth using data from a tire mounted sensor (TMS), including: determining, based on data collected by the tire mounted sensor, a tire deformation for a tire; determining, based on the tire deformation, an effective rolling radius of the tire; and determining, based at least on the effective rolling radius of the tire, an estimated tread depth for the tire.

A measuring device includes an acceleration sensing module, a signal acquisition module, and a pedaling frequency. The acceleration sensing module is configured to produce an acceleration signal according to an acceleration of a bicycle. The acceleration signal is associated with an acceleration waveform information. The signal acquisition module is electrically connected to the acceleration sensing module. The signal acquisition module acquires the acceleration waveform information from the acceleration signal according to a predetermined parameter. The pedaling frequency calculation module is electrically connected to the signal acquisition module. The pedaling frequency calculation module calculates a pedaling frequency data according to the acceleration waveform information. In addition, a measuring method is also provided.

A method includes sensing through time-of-flight measurements a distance of an object from an electronic device, sensing motion of the electronic device, sensing acoustic signals received by the electronic device, and detecting the presence of a human proximate the electronic device based on the sensed distance, motion and acoustic signals. Access to the electronic device is controlled based on whether a human is detected as being present.

A communication terminal includes: a power supply unit: a sensor: a wireless communication unit that transmits a detected value detected by the sensor to an external device in a wireless manner; and a control unit that sets one of a first mode and a second mode as an operation mode of the communication terminal, acquires the detected value detected by the sensor, and controls electric current to be supplied from the power supply unit, the electric current to be supplied to part of the control unit and the wireless communication unit in the second mode being made lower than in the first mode, wherein, when a difference between a present detected value detected by the sensor and a previous detected value detected by the sensor is smaller than a threshold value, the control unit sets the second mode as the operation mode of the communication terminal.

A disclosed sensor includes a substrate, a substrate electrode, a sensor element, a sensor electrode, and a connection member. The substrate has a main face. The substrate electrode is disposed on the main face. The sensor element has a first face perpendicular to the main face, and detects an angular velocity about an axis parallel to the main face. The sensor electrode is disposed on the first face of the sensor element. The connection member connects the substrate electrode and the sensor electrode. The width of the sensor electrode at a position closer to the main face is smaller than the width of the sensor electrode at a position farther from the main face.