Title:
DEPTH MEASUREMENT SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2021/103428
Kind Code:
A1
Abstract:
The present invention provides a depth measurement system and method. The system comprises: a transmitting module comprising a light source used for transmitting to a target object a pulsed beam with a power-time waveform modulated; an acquisition module comprising an image sensor consisting of at least one pixel and used for acquiring the pulsed beam reflected by the target object and generating a grayscale image; and a control and processing circuit used for providing a modulation signal required by the light source to emit the pulsed beam and controlling the duty ratio of the pulsed beam and a rising/falling edge time, at the same time controlling the acquisition module to receive the pulsed beam, and calculating the time of flight of the pulsed beam and/or the distance of the target object on the basis of the grayscale image, the duty ratio of the pulsed beam and the rising/falling edge time matching each other to reduce system errors. By setting the duty ratio of the pulsed beam and the rising/falling edge time that match each other, the system errors are reduced, thereby improving measurement accuracy.
Inventors:
MA XUAN (CN)
SUN FEI (CN)
SUN RUI (CN)
YANG SHEN WU (CN)
ZHOU XING (CN)
CUI DONGYAO (CN)
FANG ZHAO XIANG (CN)
WANG ZHAO MIN (CN)
SUN FEI (CN)
SUN RUI (CN)
YANG SHEN WU (CN)
ZHOU XING (CN)
CUI DONGYAO (CN)
FANG ZHAO XIANG (CN)
WANG ZHAO MIN (CN)
Application Number:
PCT/CN2020/089780
Publication Date:
June 03, 2021
Filing Date:
May 12, 2020
Export Citation:
Assignee:
SHENZHEN ORBBEC CO LTD (CN)
International Classes:
G01S17/10; G01S7/484; G01S17/89
Foreign References:
| CN111025315A | 2020-04-17 | |||
| CN110456379A | 2019-11-15 | |||
| CN206023725U | 2017-03-15 | |||
| CN106574974A | 2017-04-19 | |||
| CN109375193A | 2019-02-22 | |||
| JP2017116314A | 2017-06-29 |
Attorney, Agent or Firm:
CHINA TRUER IP (CN)
Download PDF:
Previous Patent: IMAGE SCANNING SYSTEM
Next Patent: METHOD FOR ANALYZING AND DETECTING FOUR SULFONAMIDE ANTIBIOTICS IN ENVIRONMENTAL WATER SAMPLE
Next Patent: METHOD FOR ANALYZING AND DETECTING FOUR SULFONAMIDE ANTIBIOTICS IN ENVIRONMENTAL WATER SAMPLE