LightGyro: A Batteryless Orientation Measuring Scheme Based on Light Reflection

In industrial production, the orientation of facility components can indicate whether is on a regular operating track. For example, when component get loose, variation would exceed normal range. A common approach for measurement to attach an inertial unit (IMU) target device. However, IMU requires additional power maintenance. This paper presents LightGyro, cheap and efficient batteryless scheme measure orientation, in which we reflective film device use camera capture light spot film. The basic idea LightGyro extract spots captured frame their pixel coordinates infer orientation. It difficult recognize single because lacks distinctive features. To solve problem, switch sources off regulate appearance utilize subtraction spots. depth field lost process projection, necessary measurement. address issue, propose array-based reflection model from relative positions multiple best our knowledge, this first work Experiment results show that error decreases with increasing length route achieve less than 1°.