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A mechatronic tool known as an angle sensor monitors and scales mechanical rotation into an electrical signal. A moving machine component can be positioned and moved angularly using the signal in a motion control system.
The hub gear wheel of the steering-angle sensor, which is mounted to the steering shaft, communicates the shaft’s rotation to two measurement gear wheels. A magnet that is installed in each measurement gear wheel has a field that shifts direction in response to rotational movement.
A GMR sensor element is placed below each magnet to measure the angle at which the magnet is positioned above. Directly on the circuit, the analogue values of the GMR elements are transformed into digital data, which is then transmitted via serial interface to the CPU.
Due to the differing tooth counts on the measurement gears, they rotate at various speeds. The absolute steering-wheel angle can be calculated using mathematical operations based on the location of the measurement gears.
The Global automotive angle sensor market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
With the introduction of the TAS4240 TMR-based angle-sensor for automotive and industrial applications, TDK Corporation (TSE:6762) broadened its selection of tunnel-magnetoresistance (TMR) angle sensors. The TAS4240 offers two redundant analogue single-ended SIN/COS outputs and is housed in a small TSSOP8 box.
In situations where great performance is required but there is a demand for compactness, the sensor offers exact angle readings. The sensor has two distinct SIN/COS outputs and four TMR half bridges.
The system can then reach higher safety standards up to ASIL D while providing higher availability of position data even in the event that one of the output signals fails. The sensor may also be able to enable fail-operational ideas, depending on the system design.
Based on Giant Magnetoresistance Technology (GMR element), the steering-angle sensor gives an absolute steering-angle value over the whole steering-angle range (multi-turn sensor). The output of the right angle within the measuring range as soon as the ignition is turned on is a special characteristic of this steering-angle sensor.
Even after disconnecting and reconnecting the power source, turning the steering wheel or taking any other actions is not necessary to initialise the sensor (True Power-on). With the CAN link, the steering angle and steering-angle velocity are made available.
This sensor can be used in safety systems thanks to particular self-diagnostic features and sensor-internal plausibility testing. For applications involving safety, the sensor approach also enables the integration of a second microcontroller.
