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CONTACTLESS DISTANCE FINDER INSIDE WIND TURBINE BLADE ROOT

IP.com Disclosure Number: IPCOM000235687D
Publication Date: 2014-Mar-20
Document File: 9 page(s) / 168K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed herein is a technique to install a contactless distance finder sensor in a blade root part. The proposed technique measures blade tip or near-tip part information. The contactless distance finder sensor may include a laser, infrared, ultrasound, or other type of sensor. The laser based distance finder sensor provides highest feasibility. The laser sensor is installed on the inside wall of the blade. The inside wall of the blade is not affected by a pre-bend. Model-based estimation technology is used to derive more information of the pre-bend part through a measurable point. The measured point is used to derive the close-to-tip information.

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CONTACTLESS DISTANCE FINDER INSIDE WIND TURBINE BLADE ROOT

BRIEF ABSTRACT

Disclosed herein is a technique to install a contactless distance finder sensor in a blade root part. The proposed technique measures blade tip or near-tip part information. The contactless distance finder sensor may include a laser, infrared, ultrasound, or other type of sensor. The laser based distance finder sensor provides highest feasibility. The laser sensor is installed on the inside wall of the blade. The inside wall of the blade is not affected by a pre-bend. Model-based estimation technology is used to derive more information of the pre-bend part through a measurable point. The measured point is used to derive the close-to-tip information.

KEYWORDS

Wind turbine, blade, blade tip, sensors, contactless distance finder

DETAILED DESCRIPTION

High performance of a wind turbine is an important aspect.  Many sensors such as accelerometers, strain gages, and others are installed in a blade to get better control performance for the wind turbine. A blade tip is the fastest component to experience wind load in wind turbines. Sensors are easily installed in a root part of blade. However, the installation is very difficult and expensive if the sensors are required to be installed at the blade tip or near tip part. Power supply and data transmission are also very difficult for the sensors which are installed at the tip or near tip part.

In one conventional technique, a wind turbine blade includes a sensor system and an optical path which is comprised of a first optical sensor fiber, a second optical sensor fiber, and a patch optical fiber.

One other conventional technique includes a pressure sensor on a suction or pressure side shell member of the wind blade. The pressure sensor includes a body mounted to an inner surface of the respective shell member within an internal cavity. A sensing element has a first side which is exposed to external air pressure through a passage in the respective shell member. The opposite side of the sensing element is exposed to a reference pressure.

However, the conventional techniques may not measure every aspect of blade information or provide blade information as quickly as would be desired.

Therefore, there is a need in the art to measure more and faster blade information.

Disclosed herein is a technique to install contactless distance finder sensor in the blade root part. The proposed technique measures the blade tip or near-tip part information. The contactless distance finder sensor includes laser, infrared, ultrasound, among others. The laser based distance finder sensor has highest feasibility.

The laser sensor is installed on an inside wall of the blade. The inside wall of the blade is not affected by a pre-bend. Model-based estimation technology is used to derive more information of the pre-bend part through a mea...