System for measuring inclination angle of wind power tower based on three-dimensional Hall sensor

Abstract

The invention discloses a system for measuring an inclination angle of a wind power tower based on a three-dimensional Hall sensor. The system comprises an inclination angle measuring device and an embedded host, the inclination angle measuring device is arranged in a tower drum; the inclination angle measuring device comprises a three-dimensional Hall sensor, a microprocessor, a magnetic isolation CAN transceiver, a system basic sheet and a swing rod mechanism. A magnet is mounted on the swing rod mechanism; the three-dimensional Hall sensor is located above the magnet and is in non-contact magnetic field space crosslinking, the swing rod mechanism drives the magnet to rotate in the circumferential direction along with swinging of the tower drum and is used for adjusting proper sensitivity and damping characteristics, and the microprocessor completes tower drum inclination angle data measurement by reading internal data of the three-dimensional Hall sensor and conducting algorithm processing. Through the unique compound pendulum design of the three-dimensional Hall sensor and the swing rod mechanism, equal-angle transmission of external inclination angle signals of the system is completed, the data accuracy is high, and the repeatability is high.

Description

technical field [0001] The invention belongs to the technical field of wind turbine tower measurement, in particular to a system for measuring the inclination angle of a wind turbine tower based on a three-dimensional Hall sensor. Background technique [0002] After the wind power tower is installed, due to foundation settlement, structural deformation, strong wind and other reasons, the tower may tilt or even collapse, causing serious economic losses. Since the commercial use of wind power, tower monitoring has always been a problem. In the past, the inclination detection of the tower used an acceleration sensor, the core of which was a micro-machine chip, which had high sensitivity, but had two fatal shortcomings: firstly, due to the long-term measurement of the system, the measurement micro-chip had obvious physical deformation. Therefore, the repeatability of the measured value relative to the absolute physical position is not good. Although the sensitivity is high, the...

AI Technical Summary

Problems solved by technology

In the past, the tower inclination detection used acceleration sensors, the core of which was a micro-mechanical chip, which had high sensitivity, but there were two fatal shortcomings: first, due to the long-term and multiple measurements of the system, the measurement micro-chip had obvious physical deformation. Therefore, the repeatability of the measured value relative to the absolute physical position is not good. Although the sensitivity is high, due to the inherent characteristics of the principle, the cumulative absolute error is getting larger and larger, and finally it can only be a reference relative measurement data; The forced vibration caused by the natural swing of the tube, the swing center remains unchanged, and the non-essential tower tube deformation will also act on the detection system many times, resulting in unnecessary cumulative errors and a large amount of practically useless data

Finally, the price of the acceleration sensor is quite expensive, which increases the detection cost

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