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Time-of-flight ranging sensor and its ranging method

A ranging sensor and time-of-flight technology, applied in the field of sensing, can solve the problems of increasing the pulse width of detection light, increasing power consumption, and damage to the light source of TOF sensor

Active Publication Date: 2021-02-26
SHANGHAI JUYOU SMART INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The measurable distance of the TOF sensor is related to the pulse width of the detection light. When the pulse width of the detection light is Δt, the maximum detectable distance is In the prior art, in order to increase the detectable distance of the TOF sensor, it is necessary to increase the pulse width of the detection light, resulting in increased power consumption, and the increase in the continuous light-emitting time of the pulse light is also likely to cause damage to the light source of the TOF sensor

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  • Time-of-flight ranging sensor and its ranging method
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  • Time-of-flight ranging sensor and its ranging method

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Embodiment Construction

[0029] The specific implementation of the time-of-flight ranging sensor and the ranging method provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Please refer to figure 1 , is a schematic structural diagram of a time-of-flight ranging sensor according to a specific embodiment of the present invention.

[0031] The time-of-flight ranging sensor includes: a light source module 101 , a sensing module 102 and a processing module 103 .

[0032] The light source module 101 includes a light emitting element, which may be an LED diode or a laser diode, a VCSEL laser, etc., and is used to send modulated pulsed light to the measured object.

[0033] The sensing module 102 includes an optical sensing pixel array for acquiring reflected light signals of the measured object and forming corresponding sensing signals.

[0034] The processing module 103 is connected with the sensing module 102 and the light source modu...

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Abstract

A time-of-flight distance measuring sensor and a distance measuring method thereof are disclosed. The distance measuring method of the time-of-flight distance measuring sensor comprises the followingsteps: detection light of a certain pulse width is emitted; a reflected light signal of a measured object is received; whether distance information of the measured object is detected is determined; ifnot, a pulse of the detection light is moved forward or moved back. A distance measuring range of the time-of-flight distance measuring sensor can be expanded via movement of the pulse of the detection light, and the sensor is low in power consumption.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a time-of-flight ranging sensor and a ranging method thereof. Background technique [0002] The Time Of Flight (TOF) method realizes the measurement of the three-dimensional structure or three-dimensional profile of the measured object by measuring the time interval from the emission to the reception of the pulse signal sent by the measuring instrument or the phase generated by the laser going back and forth to the measured object once. TOF measuring instruments can obtain grayscale images and distance images at the same time, and are widely used in many fields such as somatosensory control, behavior analysis, monitoring, automatic driving, artificial intelligence, machine vision, and automatic 3D modeling. [0003] Time-of-flight (TOF) sensors generally include: a light source module and a photosensitive module; the light source module is used to emit pulsed detection light of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/10
CPCG01S17/10
Inventor 刘洋
Owner SHANGHAI JUYOU SMART INTELLIGENCE TECH CO LTD