Pasco Wireless Motion Sensor

This sensor uses ultrasound to measure the position, velocity, and acceleration of objects, ranging from 15 cm to 4.0 m away. With both Bluetooth and USB connectivity, this easy-to-use sensor enables students to take turns measuring their distance, while the class observes their motion materializing as a graph in real time. And, without cables to get in the way, students can extend their studies with handheld and ceiling-mounted applications. The Wireless Motion Sensor uses echolocation, similar to a dolphin or bat. In order to determine the distance to an object, an ultrasonic pulse is emitted from the sensor. The sensor listens for a signature ‘echo’ which reflects off the object’s surface. The object's distance is calculated by determining the elapsed time between the ultrasonic pulse and detected echo, then, this value is used with the speed of sound to calculate the object's distance. Measurements of velocity and acceleration are derived algorithmically using numerical methods. This provides a balanced approach to calculating numerical derivatives, which reduces noise and minimizes smoothing effects on high frequency peaks. Pasco, No Substitute.