tof ranging system and mobile platform

A distance measurement system and optical system technology, applied in the field of distance measurement, can solve the problems of increased electrical power and optical power, increased integration time, insufficient optical signal strength, etc., to increase the distance measurement range, increase the radiation power density, and improve the signal-to-noise ratio Effect

Active Publication Date: 2019-02-19
SZ DJI TECH CO LTD
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Problems solved by technology

[0004] But in the TOF ranging system, on the one hand, as the measurement distance increases, the intensity of the returned optical signal decreases, resulting in insufficient optical signal intensity received by the receiver. On the other hand, in order to obtain sufficient optical signal intensity, the integration time needs to be increased. At this time, the electrical power and optical power consumed will increase
Therefore, the current TOF ranging system can only detect obstacles that are relatively close, but cannot detect obstacles that are farther away

Method used

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  • tof ranging system and mobile platform

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Embodiment Construction

[0053] The following will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as com...

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Abstract

An embodiment of the present invention provides a TOF ranging system and a movable platform. The TOF ranging system includes: a light emitter, a receiver, a controller, and an optical system. The optical system includes a first optical signal processing device and a second optical signal processing device. At least one of the devices; the optical signal emitted by the light emitter passes through the first optical signal processing device to improve the radiation power density of the optical signal emitted by the light emitter; the optical signal reflected by the target object passes through the second optical signal processing device to improve the receiving The intensity of the light signal reflected by the target object received by the detector. The embodiments of the present invention can improve the signal-to-noise ratio of the TOF ranging system by increasing the radiation power density of the optical signal emitted by the light emitter, and / or increasing the intensity of the optical signal reflected by the target object received by the receiver, so that the TOF ranging system Target objects that are far away from the TOF ranging system can be detected, thereby improving the ranging range of the TOF ranging system.

Description

technical field [0001] Embodiments of the present invention relate to the field of distance measurement, and in particular to a TOF distance measurement system and a movable platform. Background technique [0002] At present, a movable platform (such as an unmanned aerial vehicle, a detection robot, etc.) is provided with a detection device, and the detection device is used to detect obstacles around the movable platform, so as to prevent the movable platform from colliding with surrounding obstacles. [0003] Time Of Flight (TOF for short) is a commonly used ranging method. The TOF ranging method includes the phase modulation method. The phase modulation method refers to the light source of the TOF ranging system on the movable platform emitting a Amplitude-modulated continuous light signal, the light source is usually a light emitting diode (Light Emitting Diode, referred to as LED), when the continuous light signal irradiates the obstacle around the movable platform, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/10G01S17/14
CPCG01S17/14
Inventor 谢捷斌占志鹏任伟
Owner SZ DJI TECH CO LTD
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