Kart/sensors/HCSR04
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It has a dedicated [[Kart/sensor board#Ultrasound ranger|connector]] on the [[Kart/sensor board|I/O board]]. | It has a dedicated [[Kart/sensor board#Ultrasound ranger|connector]] on the [[Kart/sensor board|I/O board]]. | ||
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| + | The <code>ultrasoundRanger</code> block in the <code>sensors</code> FPGA counts the ultrasonic pulse length in terms of the 10 MHz clock periods. | ||
| + | The distance is thus given by: | ||
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| + | :: <math>distance = \frac{580}{count} ~ [cm]</math> | ||
[[Category:Kart]] | [[Category:Kart]] | ||
Revision as of 13:25, 21 August 2014
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Ultrasound ranger
The elecfreaks Ultrasonic sensor distance measuring module receives a trigger pulse, sends an ultrasonic pulse train and the provides a pulse whose length is proportional to the sound flight and echo time.
It has a dedicated connector on the I/O board.
The ultrasoundRanger block in the sensors FPGA counts the ultrasonic pulse length in terms of the 10 MHz clock periods.
The distance is thus given by:
![distance = \frac{580}{count} ~ [cm]](/fsi/images/math/7/6/3/763616187637212d75c2855b8bf1f39a.png)
