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PGA450-Q1: Chassis mount, preferred method.

Johannes Wiig
Prodigy 70 points
Part Number: PGA450-Q1

Hi,

I want to make a mounting bracket for the ultrasonic sensor and PCB http://www.ti.com/tool/TIDA-00151

Is there a preferred way to mount the transducer? 

Is the performance impacted by countersinking the cylindrical transducer, say, halfway into a snug plastic hole? 

Grateful for advice.

 

  • 0
    TI__Mastermind 27950 points
    Hi Johannes,
    The mechanical mounting bracket can be one of the greatest system integration challenges for an ultrasonic system. The most import factor to consider in that you do not want the transducer to make direct contact to any hard materials (i.e. plastic, metal, wood). Hard materials will not allow the transducer to properly vibrate, and will hinder performance.

    Most transducer are usually buffered to a hard enclosure by a rubber ring in between. The rubber ring is malleable enough to hold the transducer in place without hindering performance. The rubber ring is typically a few millimeters in thickness. You can countersink the transducer into a plastic hole, but be sure to line the whole or wrap the transducer with a rubber casing.