System and method for measuring time flight distance of time code

A technology of time coding and flight distance, applied in the computer field, which can solve the problems of low frame rate, interference, error, etc.

Active Publication Date: 2019-12-24
ORADAR TECH CO LTD
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Problems solved by technology

Therefore, the frame rate of the system is often limited by the maximum measurement distance. When the system measurement distance reaches 100 meters or even farther, the frame rate is very low, which is difficult to meet the high frame rate requirements of some practical applications.
[0004] In addition, when

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Embodiment Construction

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0060] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be used for both fixing and circuit communication.

[0061] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", ...

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Abstract

The invention provides a system and a method for measuring a time flight distance of a time code. The system comprises: a transmitter configured to transmit an optical signal pulse string with a timecode; a collector configured to collect photons in the optical signal pulse string reflected back by an object; and a processing circuit connected to the transmitter and the collector, and configuredto count the photons to form a frame period single-photon counting timing sequence string, and draw a histogram based on the time code and the frame period single-photon counting timing sequence string. According to the system and the method provided by the invention, the transmitter is allowed to transmit the pulse train at a pulse period that is far less than a maximum flight time correspondingto a maximum measurement range, so that the frame rate can be greatly improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a system and method for time-coded time flight distance measurement. Background technique [0002] Time of flight (TOF) method calculates the distance of objects by measuring the flight time of light beams in space. Due to its advantages of high precision and large measurement range, it is widely used in consumer electronics, unmanned vehicles, AR / VR and other fields. [0003] Distance measurement systems based on time-of-flight principles, such as time-of-flight depth cameras and lidar systems, often include a light source transmitter and a receiver. Calculate the distance of the object by calculating the time required for the light beam to be reflected and received. When using the direct time-of-flight method for measurement, the transmitter emits a pulsed beam to the target, and the pulsed beam is emitted at a certain frequency. The time interval (pulse period) between ad...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S7/486G01S7/497G01S7/484
CPCG01S17/08G01S7/4865G01S7/484G01S7/497
Inventor 朱亮陈挚闫敏
Owner ORADAR TECH CO LTD
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