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A sensor system created for side impact detection is the automotive peripheral pressure sensor. The door cavity has been installed with the peripheral pressure sensor, which provides quick and reliable side impact detection. The sensor tracks variations in air pressure as well as any caused by the door bending over time.
The peripheral pressure sensor substantially improves the ability to discern between an actual impact and benign impulses in contrast to central sensors. The entire door functions as a sensory element by continuously distributing pressure inside the door interior.
The Global Automotive Peripheral pressure 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.
The most precise automotive peripheral pressure sensor is introduced by Melexis. While the MLX90822 from the same manufacturer offers an analogue output voltage, the MLX90824 ascertains the absolute pressure before delivering a digital output signal through the SENT protocol.
A sensor readout circuit, digital hardware, voltage regulators, SENT or analogue output drivers, along with all the necessary passive components, make up the MLX90824 and MLX90822.
The MLX90824 has a pre-calibrated NTC thermistor (negative temperature coefficient) input (SENT output). Customers can now link their NTC through the pressure sensor without requiring end calibration thanks to this.
Incorporated are excellent overvoltage (+40 V) and reverse voltage (-40 V) protection devices. A micro-machined diaphragm makes up the MEMS, which is the MLX90824 and MLX90822’s sensing component.
It is adhered all the way around a silicon substrate cavity that has been carved into it. There is a reference vacuum in this cavity. Any alteration in the ambient absolute pressure causes the diaphragm to respond.
The diaphragm’s piezo-resistive components are arranged to form a Wheatstone bridge that produces a signal. The signal is subsequently amplified and converted into a digital representation by the auxiliary front-end circuits.
Temperature adjustment is carried out by the 16-bit Digital Signal Processing (DSP). Finally, an analogue output or SENT is used to deliver the outcome.
