High-sensitivity ultrasound sensor targets automotive
Murata Manufacturing Co., Ltd., has announced the introduction of a new ultrasound sensor device intended for deployment in automotive applications. With high-sensitivity and rapid responsiveness, the MA48CF15-7N is housed in a hermetically-sealed package to protect against liquid ingress.
With vehicle designs set to incorporate higher levels of autonomy, more accurate short/medium-range object detection mechanisms are going to be needed. Through the emission of ultrasonic waves and subsequent detection of their reflections, it is possible to determine an object’s presence, as well as gauging its distance away.
Capable of covering a wide detection range, from 15-cm all the way to 550-cm, the MA48CF15-7N ultrasound sensor delivers high obstacle detection accuracy. It generates a beam across an angle of 120° by 60°. The 1100 pF (±10%) capacitance (at 1 kHz) is another important aspect, exhibiting narrow deviation — meaning that no transformer adjustment is required.
The resonant frequency is 48.2±1.0 kHz and there is a 35±10 Q value for improved usability plus better temperature performance. Tolerances on these two parameters are reduced by 50% compared to previous Murata ultrasound sensor models, enabling much smaller variations in the detection characteristics of individual units.
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