Abstract: In a handheld device for determining heartbeat/heart rhythm of a user, a method is provided for providing spoken instructions for the user of the device. The method comprises obtaining, over time, via an optical sensor like a camera, a data signal and providing the data signal to an electronic data processor. In the electronic data the processor, determining, based on the signal, a quality factor for the signal. In the electronic data processor, an algorithm is executed for determining a heartbeat using data comprised by the data signal as input. The electronic data processor looks up, from an electronic memory, at least one audio-visual data file comprising data representing audio-visual feedback instructions, based on at least one of the quality factor and the outcome of the execution of the algorithm. A speaker is used to reproduce the audio-visual feedback instructions and aid the user in device placement.

Abstract: A method of onboard determination of vehicle wheel alignment is provided. In a first step, a lateral acceleration signal is generated, using an accelerometer mounted on the vehicle wheel. In a second step, a first lateral acceleration value ay Acc is derived from a first portion of the lateral acceleration signal, which is during a longitudinal acceleration a0 of the vehicle. In a third step, a second lateral acceleration value ay CS is derived from a second portion of the lateral acceleration signal, which is measured when the longitudinal acceleration has ceased and the vehicle is travelling at constant speed. In a fourth step, the magnitude of the longitudinal acceleration a0 associated with the first portion of the lateral acceleration signal is measured.

Abstract: A method of onboard determination of vehicle wheel alignment is provided. In a first step, a lateral acceleration signal is generated, using an accelerometer mounted on the vehicle wheel. In a second step, a first lateral acceleration value ay Acc is derived from a first portion of the lateral acceleration signal, which is during a longitudinal acceleration a0 of the vehicle. In a third step, a second lateral acceleration value ay CS is derived from a second portion of the lateral acceleration signal, which is measured when the longitudinal acceleration has ceased and the vehicle is travelling at constant speed. In a fourth step, the magnitude of the longitudinal acceleration a0 associated with the first portion of the lateral acceleration signal is measured.