MULTI-LIDAR SYSTEM

• US 20120092645A1
• Filed: 10/13/2011
• Published: 04/19/2012
• Est. Priority Date: 10/13/2010
• Status: Abandoned Application

• Current Assignee: Japan Aerospace Exploration Agency
• Original Assignee: Japan Aerospace Exploration Agency
• Inventors: Inokuchi, Hamaki
• Application Number:
  US13/272,526
• Publication Number:
  US 20120092645A1
• Time in Patent Office: Days
• US Class Current: 356/28.5
• CPC Class Codes: G01S 17/58 Velocity or trajectory determination systems; Sense-of-movement determination systems
• CPC Class Codes: G01S 17/95 for meteorological use
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

An object of the present invention is to provide a method enabling measurement in a wider range than a conventional LIDAR system and capable of measuring airflow information, which is used to reduce shaking of an airframe when an aircraft collides with turbulence, in a shorter period, and a device having corresponding functions. A multi-LIDAR system according to the present invention includes at least two optical remote airflow measurement devices of a Doppler LIDAR system employing laser light that are provided in a fixed relative position relationship, has functions for emitting lasers of identical wavelengths from the respective devices and receiving scattered light by the respective devices, thereby improving redundancy with respect to defects, and improves a detectability by increasing an integration amount of respective measurement signals.

Claims

1. A multi-LIDAR system, comprising at least two optical remote airflow measurement devices of a doppler LIDAR system employing laser light that are provided in a fixed relative position relationship,

wherein functions for emitting lasers of identical wavelengths from the respective devices and receiving scattered light by the respective devices are provided, thereby improving redundancy with respect to defects, and

a detectability is improved by increasing an integration amount of respective measurement signals.

2. The multi-LIDAR system according to claim 1, further comprising a mechanism for performing scans independently in optical axis orientation directions of the lasers emitted from the respective optical remote airflow measurement devices, whereby a measurement area can be widened in a left-right direction or a vertical direction.

3. The multi-LIDAR system according to claim 1, further comprising a mechanism for emitting laser beams simultaneously in a left-right direction after vertically shifting optical axis orientation directions of the lasers emitted from the respective optical remote airflow measurement devices, whereby vertical components of a wind velocity can be measured in a single measurement.