ultrasonic ranging

The velocity of the ultrasound wave after it is emitted will

• progressively increasing

• progressively decreasing

• practically unchanged

The ultrasonic distance measurement formula is

• (t1+t2)*v/2

• (t2-t1)*v/2

• (t2-t1)*v

• (t1+t2)*v

Reorder as follows

• signal conversion

• Receive ultrasound

• signal calculation

• Transmits ultrasound

• signal output

Conversion of optical and electrical signals used in ultrasonic distance measuring devices

• TRUE

• FAULT

The independent variable in the ultrasonic ranging device is the distance to the obstacle

• TRUE

• FAULT