Ranging method based on flight time and ranging system based on flight time

A technology of time-of-flight and ranging method, applied in the ranging system based on time-of-flight, and the field of ranging based on time-of-flight, can solve the problems of low accuracy of depth image and large measurement error, etc.

Pending Publication Date: 2020-10-27
SHENZHEN GOODIX TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the purposes of this application is to disclose a time-of-flight based ranging method that performs multiple signal samplings at the receiving end for a predetermined time to obtain the sampling results of the reflected signals corresponding to a single pulse, and adopts this method Based on the time-of-flight ranging system, to solve the technical problems of large measurement errors and low depth image accuracy of the time-of-flight ranging system in the prior art

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  • Ranging method based on flight time and ranging system based on flight time
  • Ranging method based on flight time and ranging system based on flight time
  • Ranging method based on flight time and ranging system based on flight time

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[0019] Various embodiments or examples for implementing different features of the present application are provided below. Specific examples of components and configurations are described below to simplify the present application. Of course, these descriptions are examples only, and are not intended to limit the present application. In addition, the application may reuse reference symbols and / or labels in various embodiments. Such re-use is for the sake of brevity and clarity and does not in itself represent a relationship between the different embodiments and / or configurations discussed. Furthermore, it will be understood that if it is described herein that an element is "connected to" or "coupled to" another element, that element may be directly connected or coupled to the other element, or Indirectly connect or couple to the other element through other elements.

[0020] The time-of-flight ranging scheme disclosed in this application can send a single pulse intermittently...

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Abstract

The invention discloses a ranging method based on flight time and a ranging system based on flight time. The ranging method comprises the following steps: intermittently sending a pulse from a transmitting end, wherein the pulse is reflected by a target object to generate a reflected signal; enabling a receiving end to execute signal sampling for multiple times according to a sampling time interval for a preset time to generate a sampling result of a reflected signal, wherein the preset time is larger than or equal to two times of the pulse period of a pulse; detecting the flight time of the pulse from the transmitting end to the receiving end according to the sampling result; measuring the distance between the target object and a reference position according to the flight time. The ranging method can meet the requirement for low energy consumption, the distance of the target object can be rapidly measured, and good measuring quality can be maintained.

Description

technical field [0001] The present application relates to ranging and depth sensing technologies, and in particular to a time-of-flight based ranging method and a related time-of-flight based ranging system. Background technique [0002] In the distance measurement technology based on time of flight (TOF), pulse modulation (pulse modulation) measures the distance of the target object through the time difference between optical pulse transmission and reception, and has a relatively simple measurement mechanism. Pulse modulation requires high precision in time measurement. However, the relationship between the intensity of the light pulse and the time and the relationship between the photoresponse characteristic of the pixel and the time are both non-linear, thus reducing the accuracy of the depth image. [0003] In order to improve the detection accuracy, a common method is to use continuous wave modulation, which can reduce the deviation caused by the measurement device or ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S17/10
CPCG01S17/10G01S7/4816G01S7/4863G01S7/4865G01S7/4861G01S7/484G01S17/26G01S15/10
Inventor杨孟达
OwnerSHENZHEN GOODIX TECH CO LTD