Wireless motion sensor

I. Working Principle
The wireless motion sensor consists of a transmitter module and a receiver module. The transmitter module is powered by a lithium battery, while the receiver module is connected to a data acquisition device. During measurement, the transmitter simultaneously emits an infrared pulse and an ultrasonic pulse (i.e., a very short burst of infrared light and ultrasonic waves) toward the receiver. The receiver starts timing upon receiving the infrared pulse and stops timing upon receiving the ultrasonic pulse. The microprocessor inside the receiver calculates the distance between the transmitter and receiver based on the time difference between the two pulses and the speed of sound in air (the ultrasonic propagation speed is 324 m/s). The propagation time of infrared light can be neglected, as its speed is equal to the speed of light.
II. Specifications
Range: 0–2 m
Resolution: 0.002 m
III. Structure and Features
1. Equipped with a 1.8-inch color LCD screen.
2. Configured with five functional buttons for simple and convenient operation.
3. Supports high-speed USB data transfer for fast communication with data acquisition devices.
4. Supports wireless communication with experimental terminals.
5. Features a built-in large-capacity removable battery.
6. Includes a sensor interface with snap fasteners, enabling combination experiments with standard sensors.
7. Comes with a fixed mounting position for attachment to iron stands, allowing integration with traditional equipment.
8. Compatible with common operating systems such as iOS, Android, and Windows.
IV. Typical Applications
The wireless digital motion sensor is a high-precision, short-range linear sensor that uses ultrasonic waves to measure position. It is suitable for studying uniform and uniformly accelerated linear motion, free-fall motion, spring oscillators, and other related experiments.
V. Note
This product is intended for educational use only and is not suitable for industrial, medical, research, or commercial applications.
VI. Usage Tips
1. The wireless digital motion sensor consists of an ultrasonic receiver module and a transmitter module. During use, connect the displacement receiver module to the data acquisition device, while fixing the transmitter module to the moving object (or using it as the moving object). Turn on the switch at the back of the transmitter module to begin measurement.
2. After use, turn off the switch on the displacement sensor’s transmitter module. When using the transmitter module as a free-falling object, place a shock-absorbing recovery device to prevent damage to the sensor.