Which ultrasonic sensor for your face?

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SUMMARY

The discussion focuses on selecting the appropriate ultrasonic sensor for measuring the distance from a person's head to a monitor. Key considerations include the sensor's accuracy, beam width, and potential health effects from prolonged exposure to ultrasonic frequencies above 20KHz. The user expresses concerns about background interference and the need for a narrow beam width to ensure accurate measurements. They also explore options from SuperDroid Robots and Mouser, noting challenges with understanding the wiring of a specific transmitter/receiver model.

PREREQUISITES
  • Understanding of ultrasonic sensor technology
  • Familiarity with beam width and its impact on measurement accuracy
  • Basic knowledge of wiring and electronics
  • Awareness of ultrasonic frequency effects on human health
NEXT STEPS
  • Research specific ultrasonic sensors with narrow beam widths for accurate head distance measurement
  • Explore wiring configurations for ultrasonic transmitter/receiver modules
  • Investigate the health implications of ultrasonic frequencies above 20KHz
  • Compare pricing and specifications of ultrasonic sensors from various suppliers
USEFUL FOR

This discussion is beneficial for engineers, hobbyists, and developers working on proximity sensing applications, particularly those focused on human-computer interaction and safety considerations related to ultrasonic technology.

hxtasy
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Ok so say i have an application that measures how close your head is to something.


I'm currently looking at ultra sonic sensors, I'm not sure which type to get. I am mostly worried about how accurate they will be. Say I'm measuring your head right now how far away it is from your monitor, i need the signal to bounce off your head, not anything in the background, so I'm guessing it has to be a narrow beam width.

Also, what are typical outputs of these things? I know they operate at frequencies higher than 20KHz, but is there a way they can still give you a headache if one is near your ear for extended periods of time?


any input appreciated.
 
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Ok so i found some on this site:
http://www.superdroidrobots.com/shop/search.asp

which are way to expensive for what i need. Then i found some on www.mouser.com[/URL]. but one of them is a transmitter/receiver, and in the data sheet it doesn't really say how to hook it up and it appears to only have two wires coming off of it, how could this work?
 
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