Title:
ULTRASONIC WIND DIRECTION/VELOCITY AND TEMPERATURE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3157902
Kind Code:
B2
Abstract:
PURPOSE: To measure the ambient temp. (atmospheric) together with wind direction and the wind speed simultaneously, and judge whether the measurements are normal or not.
CONSTITUTION: Centering on an ultrasonic transmitter T, ultrasonic receivers R1+, R1-, R2+, R2- are placed in positions symmetrical at least in two directions, and first the temp. (T) is calculated from the ultrasonic wave transmission times t1+, t1- which are sensed by either pair of the receivers (TRANSMIT TER T + two receivers R1+, R1- placed in the opposite direction). The wind speeds v1+, v1- in both directions are calculated from this value of temperature (T) and the data of two transmission times t1+, t1-. If their absolutes are identical while symbols are opposite, it is judged that the device goes normal, and the value is used as the wind speed component in the applicable direction. The absolutes of the wind direction and speed (magnitudes) are determining by calculating the wind speeds at least in two directions in such a manner. Failure in the device can also be sensed by furnishing a thermometer separately and comparing the measurements therefrom with the ultrasonically obtained measurements.
Inventors:
Takakazu Miyahara
Application Number:
JP14016992A
Publication Date:
April 23, 2001
Filing Date:
April 30, 1992
Export Citation:
Assignee:
Elm Co., Ltd.
International Classes:
G01K11/24; G01P13/00; G01W1/04; (IPC1-7): G01W1/04; G01K11/24; G01P13/00
Domestic Patent References:
| JP52110076A | ||||
| JP47368U |
Attorney, Agent or Firm:
Ryohei Kobayashi