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Error Correction System and Method

A technology of error correction and correction plate, which is applied in the field of error correction system based on time-of-flight ranging, can solve the problems of cumbersome steps, time-consuming and laborious, and achieve the effect of reducing the number of measurements

Active Publication Date: 2021-02-26
LITE ON ELECTRONICS (GUANGZHOU) LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common wobble error correction methods often have cumbersome steps, because the wobble error is related to the distance of the object, so the measurement process may require a large space to set up the error correction system or perform multiple measurements for different distances, which is time-consuming and laborious

Method used

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  • Error Correction System and Method
  • Error Correction System and Method

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Embodiment Construction

[0019] figure 1 is a schematic block diagram of an error correction system based on time-of-flight ranging according to an embodiment of the present invention. Please refer to figure 1 , the error correction system 10 includes a distance detection device 100 and a correction plane TA. The distance detecting device 100 is used for measuring the distance to the calibration plane TA. The distance detection device 100 includes a modulated light transmitter 110 , a modulated light receiver 120 , a processor 130 , a signal processing unit 140 and a memory 150 .

[0020] The signal processing unit 140 is coupled to the modulated light transmitter 110 and the modulated light receiver 120 . The signal processing unit 140 is used for providing the first signal MS to the modulating light transmitter 110 . The modulated light transmitter 110 emits modulated light EM according to the first signal MS. The modulated light EM is reflected by the correction plane TA, and the reflected mod...

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Abstract

The invention discloses an error correction system and method based on time-of-flight distance measurement. The error correction system comprises an L-shaped correction plate and a distance detectiondevice. The L-shaped correction plate is provided with a bottom plate and a side plate connected with the bottom plate, wherein the bottom plate is provided with a plurality of target areas. The distance detection device is arranged at a shooting position and comprises a modulated light emitter, a modulated light receiver and a processor. The modulated light emitter is configured to emit modulatedlight according to a first signal, wherein the modulated light obliquely irradiates the bottom plate. The modulated light receiver is used for receiving the modulated light reflected by the target areas to generate a sensing signal. The processor is coupled to the modulated light receiver and generates a swing error correction curve according to the sensing signal.

Description

technical field [0001] The invention relates to an error correction system and method suitable for optical measurement technology, and in particular to an error correction system and method based on time-of-flight ranging. Background technique [0002] With the development of science and technology, optical three-dimensional measurement technology has gradually matured, among which time of flight (Time of Flight, TOF) distance measurement is a common active depth sensing technology at present. TOF ranging technology is to emit modulated modulated light (such as infrared light), the modulated light is reflected after meeting the object, and then the distance of the object to be photographed is converted from the reflection time difference or phase difference of the modulated light reflected by the object to generate depth information. [0003] However, TOF ranging technology needs to consider multiple error corrections, one of which is the periodic error caused by odd harmon...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/40H04B10/516G01S17/08G01S7/497
CPCG01S7/497G01S17/08H04B10/40H04B10/516
Inventor 魏守德陈韦志
Owner LITE ON ELECTRONICS (GUANGZHOU) LTD