Patent ID: 7946181
Filing Date: 2011-05-24
Classification: H04Q

Abstract:
1. A system for measuring deflection of a rotating shaft in a wireless manner, comprising: a non-contact-type angle division device placed on a vertical rotating shaft and configured to measure and transmit an angle of rotation of the rotating shaft; a plurality of wireless contact-type displacement sensors installed on an outer circumferential surface of the rotating shaft and configured to measure strain of the rotating shaft; a plurality of wireless transmitters for transmitting data about displacement of the rotating shaft measured by the wireless contact-type displacement sensor; a relay for receiving and relaying transmission signals from the non-contact-type angle division device and the wireless transmitters; and a data reader for receiving the transmission signals from the relay and performing simulation reading, wherein the non-contact-type angle division device comprises a 2-axis angle sensor for detecting an azimuth angle in a 360-degree range by detecting intensity of Earth's minute magnetic field, amplification means for amplifying 2-axis output signals of the 2-axis angle sensor, an Analog to Digital (A/D) converter for converting the amplified analog signals of the amplification means into a digital signal, a microprocessor for processing the signal obtained through the conversion of the A/D converter, an azimuth angle display unit connected to the microprocessor and configured to display the detected azimuth angle, signal transmission means connected to the microprocessor and configured to have an antenna for transmitting a signal corresponding to the detected azimuth angle, and a reset unit connected between the 2-axis angle sensor and the microprocessor and configured to reset the 2-axis angle sensor.