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Laser ranging method, device and mobile terminal

A technology of laser distance measurement and laser source, which is applied in the direction of measuring devices, radio wave measuring systems, instruments, etc., can solve serious problems such as electromagnetic radiation, and achieve the effect of reducing electromagnetic radiation, low energy, and reducing impact

Active Publication Date: 2021-04-02
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a laser ranging method, device, and mobile terminal to solve the problem of relatively serious electromagnetic radiation generated during laser ranging

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  • Laser ranging method, device and mobile terminal
  • Laser ranging method, device and mobile terminal
  • Laser ranging method, device and mobile terminal

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Embodiment Construction

[0030] The following will clearly and completely 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 some of the embodiments of the present invention, but 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 creative efforts fall within the protection scope of the present invention.

[0031] First combine the following figure 1 , to describe the basic principle of using TOF ranging in the embodiment of the present invention. figure 1 is a schematic diagram showing the principle of TOF ranging according to an embodiment of the present invention.

[0032] In one embodiment, TOF distance measurement is a method of transmitting laser pulses to the object under test and receiving reflected light from the object under test, and calculati...

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Abstract

The embodiment of the invention discloses a laser ranging method and device as well as a mobile terminal. The laser ranging method comprises the following steps: transmitting a laser pulse signal by alaser source, wherein the total duration ratio formed by a first duration ratio and a second duration ratio of the laser pulse signal is higher than 0 and less than and equal to 1; determining firstreflected light energy and second reflected light energy of a reflected light signal received, wherein the first reflected light energy is energy, received in laser source turn-on duration in durationof a single laser pulse, of the reflected light signal, and the second reflected light energy is energy, received after the laser source is turned off in the duration of the single laser pulse, of the reflected light signal; based on the first reflected light energy and the second reflected light energy, determining propagation duration, corresponding to the second reflected light energy, of thereflected light signal; and determining a distance with a measured object by utilizing the propagation duration, corresponding to the second reflected light energy, of the reflected light signal. By utilizing the embodiment of the invention, influence of electromagnetic radiation in a laser ranging process can be reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of laser modulation, and in particular, to a laser ranging method, device and mobile terminal. Background technique [0002] At present, with the increasing demand for 3D scanning, devices that realize 3D scanning functions are gradually introduced into mobile phones, attracting consumers' attention as new highlights. [0003] Among consumer electronic devices, electronic devices that can realize three-dimensional scanning functions can generally be realized by using lasers as active light sources and receiving sensors, and using structured light or time of flight (Time Of Flight, TOF) for ranging. Three-dimensional scanning can be achieved using a laser as an active light source. However, when using structured light or using TOF for ranging, the electromagnetic radiation generated by the laser pulse emitted by the laser source is very serious, which is not conducive to safe use. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/10G01S7/484
CPCG01S7/484G01S17/10
Inventor 何军
Owner VIVO MOBILE COMM CO LTD
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