Time-of-flight ranging method and device
A distance measurement method and flight distance technology, which can be used in measurement devices, distance measurement, mapping and navigation, etc., can solve problems such as time-consuming and power consumption, and achieve the effect of reducing power consumption and processing time
Active Publication Date: 2020-11-27
SHENZHEN GOODIX TECH CO LTD
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] One of the purposes of this application is to provide a time-of-flight ranging method and a time-of-flight ranging device to solve the technical problems of time-consuming and power-consuming time-of-flight ranging methods in the prior art
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The following disclosure provides various embodiments or examples, which can be used to realize different features of the disclosure. The specific examples of components and configurations described below are used to simplify the present disclosure. When it is conceivable, these narratives are only examples and are not intended to limit the content of this disclosure. For example, in the following description, forming a first feature on or on a second feature may include some embodiments where the first and second features are in direct contact with each other; and may also include In some embodiments, additional components are formed between the above-mentioned first and second features, so that the first and second features may not be in direct contact. In addition, the present disclosure may reuse component symbols and / or labels in multiple embodiments. Such repeated use is based on the purpose of brevity and clarity, and does not in itself represent the relationshi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a time-of-flight ranging device and method, and is used for measuring a distance from an object. The method comprises the following operations of irradiating an object througha first laser light, and generating a first reflected laser (S501); sensing the first reflected laser light, and obtaining a first phase displacement between the first laser light and the first reflected laser light, and the first phase displacement being less than 2 pi (S502); adding 2pi to a first phase shift to obtain a second phase shift (S503); irradiating the object with a second laser beamand generating a second reflected laser beam (S504); sensing the second reflected laser light, and obtaining a first light intensity(S505) of the second reflected laser light at a time point; determining whether the first phase shift or the second phase shift is a phase delay between the first laser light and the first reflected laser light according to the first light intensity (S506); and calculating a distance according to the phase delay (S507). The method is advantaged in that the time-of-flight distance measurement method reduces system power consumption and the operation time on the premise of not influencing accuracy.
Description
Technical field [0001] This application relates to a time-of-flight ranging method system, and more particularly to a flying distance-measuring method that uses lasers of different frequencies to sense the distance to an object and a related time-of-flight ranging device. Background technique [0002] Traditional image sensors can generate two-dimensional (2D) images and videos. Recently, image sensors and systems that can generate three-dimensional (3D) images (or depth images) have received widespread attention. These three-dimensional image sensors can be used for face recognition and augmented reality ( Augmented reality (AR) / virtual reality (VR) can be used in mobile phones, drones, security systems, artificial intelligence systems and other devices. [0003] The existing three-dimensional image sensor mainly has three implementation methods: stereo binocular, structured light and time of flight (ToF). [0004] Time-of-flight ranging is done by using specially designed pixels t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/48
CPCG01S17/48
Inventor 李宗德王浩任杨孟达
Owner SHENZHEN GOODIX TECH CO LTD