Topic
Weather vane
About: Weather vane is a research topic. Over the lifetime, 150 publications have been published within this topic receiving 590 citations. The topic is also known as: weathervane & wind vane.
Papers published on a yearly basis
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Papers
TL;DR: In this article, the authors derived wind vanes motion constants (damping ratio, natural wavelength and decay distance) in a way which can accomodate both mechanical friction and the presence of a propeller.
Abstract: Wind vane motion constants (damping ratio, natural wavelength and decay distance) are derived in a way which can accomodate both mechanical friction and the presence of a propeller. The motion is shown to be insufficiently described by a second order equation because of the way in which the aerodynamic torque changes with angle of attack. This implies that any measurements of vane constants made in the wind tunnel at initial angles of attack above 20° are not representative for the vane. Simple relations between easily measured vane dimensions and motion constants are derived, and vane motion is proved to be independent of the fin area. The WMO requirement for wind vanes is translated into motion constants and shown to be fulfilled for any vane with a damping ratio of 0.30. For turbulence measurements a certain short-wavelength reliability limit for vane-measured spectra is proposed. Experimental comparison of basic fin configurations shows the inferiority of streamlined and splayed fins. General...
42 citations
Patent•
2 Aug 1991
TL;DR: In this article, a wind vane is mounted on an aircraft in order to orient itself in the direction of flow and provided with a detector for detection of differential pressure representative of the aerodynamic angle of incidence of the wind Vane.
Abstract: The probe comprises a wind vane (1) mounted for rotation on the aircraft in order to orient itself in the direction of the flow and provided with a detector (15) for detection of differential pressure representative of the aerodynamic angle of incidence of the wind vane, and a device for determining the orientation of the wind vane with respect to the aircraft. The probe comprises a control loop (14) adapted to cancel out the aerodynamic angle of incidence of the wind vane and controlled by the detector (15). The probe supplies the true angle of incidence of the aircraft directly.
31 citations
Patent•
8 Aug 2007
TL;DR: In this paper, a drift control method of wind mill based on wind vane and output power was proposed, and the power control method was divided into anti-clockwise rotation, clockwise rotation and original position stop conditions.
Abstract: The invention relates to a drift control method of wind mill based on wind vane and output power. When the absolute wind change value is higher than 15degree, the invention uses wind vane control method, and when the absolute wind change value is not higher than 15degree, the invention uses power control method. Since the wind direction and speed changes will change the output power of generator, the power checker can check the output power of motor, the invention only processes drift control when the wind direction changes, while the wind change is used as interference signal on the power control method. The power control method is divided into anti-clockwise rotation, clockwise rotation, and original position stop conditions. The invention can shorten the align time, improve accuracy and energy utilization.
20 citations
Patent•
7 Jan 1977
TL;DR: In this paper, a wind strength generator that realizes excellent wind vane performance by installing vane wheels consisted of cylinders protruding bucket type vanes within a wind tunnel forming a diversion canal at direction of a rectifing plate side and fitted with a vertical tail.
Abstract: PURPOSE:A wind strength generator, that realizes excellent wind vane performance by installing vane wheels consisted of cylinders protruding bucket type vanes within a wind tunnel forming a diversion canal at direction of a rectifing plate side and fitted with a vertical tail.
17 citations
10 Dec 2020
TL;DR: In this article, a low-cost water station based on IoT that can provide critical water information in real time, such as wind speeds and direction, temperature, humidity, and amount of rainfall.
Abstract: The Internet of Things (IoT) is a modern innovation in today's world of the Internet, establishing an interconnection between devices and individuals and exchanging information through a shared platform. This paper proposes a low-cost water station based on IoT that can provide critical water information in real time, such as wind speeds and direction, temperature, humidity, and amount of rainfall. The use of low-cost but reliable controllers from Node MCU and Arduino UNO makes it accessible for a wide range of clients. The availability of information on a ThingSpeak web server guarantees the authorized person's access to data from anywhere in the world. A 3 cups anemometer and wind vane are used for wind speed detection and wind direction measurement, respectively. The DHT22 digital temperature and humidity sensor are used for the measurement of temperature and humidity. A custom acrylic glass rain gauge is designed for rainfall measurement. With the aid of a circuit, all weather data was de-bounced, and this de-bounced data was uploaded directly to the ThingSpeak server. This proposed design will solve the problem of the unavailability of weather information at different locations. Low-cost design, while ensuring reliable and accurate measurements, will encourage the use of the proposed design in many research and educational institutions as well.
17 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 2 |
| 2019 | 3 |
| 2018 | 9 |
| 2017 | 5 |
| 2016 | 13 |