Motion sensor is a sonar equipment generating ultrasonic wave. It receives signal via signal reflecting by objects to measure the time T that high frequency sound wave pulse comes from object to sensor. According to the sound speed in air V, calculate distance between object and sensor: d=V*T/2.
Specification
| Range |
20~600cm |
| Accuracy |
±2% |
| Resolution |
0.1cm |
Usage
Connect Motion Sensor to any port in SenseDisc.
Aim the ultrasonic wave probe to object.
Place the object within the measuring range of Motion Sensor.
Typical experiment
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Explore the simple harmonic motion
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Forced vibration
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Explore uniform linear motion and uniform accelerated motion
Notes
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Be aware of the dead zone of Motion Sensor.
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Keep the reflection surface of the object face to the sensor. The target surface should be big enough to ensure measuring accuracy.
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Try to avoid sound interruption, because Motion Sensor only senses object near to it and has strong reflection.
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