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Time-of-flight sensor and light source modulation method therefor

A ranging sensor and time-of-flight technology, applied in the field of sensing, can solve the problems of reduced signal-to-noise ratio and high power consumption, and achieve the effect of reducing energy consumption

Active Publication Date: 2019-01-11
SHANGHAI JUYOU SMART INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, regardless of the intensity of the ambient light, the light source module of the TOF sensor usually emits a stable pulse light source, the luminous intensity, period, etc. are fixed, and the power consumption is large; and when the ambient light changes, the light source The emitted light also does not change, resulting in a lower signal-to-noise ratio

Method used

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  • Time-of-flight sensor and light source modulation method therefor
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  • Time-of-flight sensor and light source modulation method therefor

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Embodiment Construction

[0021] The specific implementation of the time-of-flight ranging sensor and its light source modulation method provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] 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.

[0023] The time-of-flight ranging sensor includes: a light source module 110 and a sensor chip 120, the light source module 110 includes a light-emitting element, which can be an LED diode, a laser diode or a VCSEL laser, etc., and is used to send modulated pulses to the measured object Light.

[0024] The sensing chip 120 is used for acquiring sensing data and controlling the light source module 110 to emit pulsed light. In this specific embodiment, the sensor chip 120 includes a sensor module 121 , a processing module 122 and a light source control module 123 .

[0025] The sensing mod...

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PUM

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Abstract

The invention discloses a time-of-flight (TOF) sensor and a light source modulation method therefor. The TOF sensor comprises a light source module and a sensing chip. The sensing chip comprises a sensing module, a processing module, and a light source control module. The sensing module is used for acquiring a reflected light signal of a measured object. The processing module is connected to the sensing module and used for acquiring ambient light information according to the reflected light signal, and generates a control instruction for a light source according to the ambient light information. The light source control module is connected to the processing module, and is used for adjusting an emission parameter of the light source module according to the control instruction. According tothe TOF sensor and the light source modulation method therefor, the light source can be dynamically modulated according to ambient light changes.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a time-of-flight ranging sensor and a light source modulation method thereof. Background technique [0002] The Time Of Flight (TOF) method measures 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 ranging (TOF) sensors generally include: a light source module and a photosensitive module; Received: the photosensitive module calculates the depth ...

Claims

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Application Information

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IPC IPC(8): G01S17/10
CPCG01S17/10
Inventor 刘洋
Owner SHANGHAI JUYOU SMART INTELLIGENCE TECH CO LTD
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