scanning distance meter

A technology of laser range finder and plane scanning, which is applied in the direction of instruments, measuring devices, radio wave measuring systems, etc.

Active Publication Date: 2019-08-13
IROBOT CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such measurements using the speed of light can be very fast, but may also require fast detector electronics for accurate measurements

Method used

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Embodiment Construction

[0052] Autonomous robots that perform functions such as floor cleaning and lawn mowing rely on identifying obstacles, typically user-defined or invisible, to limit their movement. Such a robot can use a triangulation-based localization system to determine the robot's position within the perimeter. In the lawnmower example, signals sent between the lawnmower located in the garden property and beacons or environmental features around the lawn allow the lawnmower to calculate the robot's current position to estimate angles and distances. Systems and methods related to scanning rangefinders for use with robotic lawn mowers and other robotic devices are described herein. In some examples described herein, the scanning rangefinder includes non-imaging optics. In some additional embodiments, the systems and methods described herein recognize and account for wrap-back, which enables distances beyond wrap-back to appear as closer distances. Identifying and accounting for rollback ca...

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Abstract

A scanning optical range finder in a mobile robot includes an optical transmitter circuit, a non-imaging optical element, an optical detector circuit, and a distance measurement circuit. The non-imaging optical element is arranged to receive an optical signal at the entrance aperture of the non-imaging optical element in response to operation of the optical transmitter circuit, and to direct the optical signal to an optical signal of the non-imaging optical element. output hole. The optical detector circuit is configured to receive the optical signal from an output aperture of the non-imaging optical element, and based on a respective phase difference of the optical signal relative to a corresponding output of the optical transmitter circuit, to generate a detection signal. The distance measuring circuit is configured to calculate the distance of the target from the phase difference indicated by the detection signal. Related apparatus and methods of operation are also discussed.

Description

[0001] priority claim [0002] This application claims the benefit of and priority to US Provisional Patent Application No. 61 / 899,045, filed November 1, 2013, entitled "SCANNING RANGE FINDER," the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to scanning optical range finders. In particular, systems and methods related to scanning optical rangefinders in mobile robots, such as lawn mowing robots and telepresence robots, are described herein. Background technique [0004] A laser rangefinder can measure the distance to an object based on the propagation speed of light output from a laser. Typical laser rangefinders operate on the principle of time-of-flight by sending a laser pulse in a narrow beam towards a target and measuring the time it takes for the pulse to reflect from the target and return to the transmitter. The propagation speed of light in the air is relatively unaffected by tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G01S17/10
CPCG01S17/42G01S7/4816G01S7/4817G01S17/10G01S17/36G01S7/497A01D34/008Y10S901/47G01S17/06
Inventor T.皮尔斯J.米利肯M.维尔加
Owner IROBOT CORP
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