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Photoelectric proximity sensor and detection method based on dynamic vision sensor chip

A technology of proximity sensors and detection methods, applied in the field of photoelectric proximity sensors, can solve problems such as high data redundancy, low time resolution, and inability to distinguish specific changes in pixels, so as to reduce power consumption, improve measurement accuracy, reduce The effect of data collection volume

Inactive Publication Date: 2019-03-29
TIANJIN NORMAL UNIVERSITY
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Problems solved by technology

However, this sampling method also has some disadvantages: first, the static background is repeatedly sampled, and the data redundancy is high, which brings great pressure to image processing and transmission storage; second, the time resolution is low, and the pixels cannot distinguish the charge integration time. Specific changes in light intensity, but only measure the cumulative sum of photocharges during this period, which is not conducive to the tracking and identification of high-speed moving targets
And if high-frequency frame shooting is used, the massive visual signals brought by the high frame rate cannot be processed in real time

Method used

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  • Photoelectric proximity sensor and detection method based on dynamic vision sensor chip
  • Photoelectric proximity sensor and detection method based on dynamic vision sensor chip
  • Photoelectric proximity sensor and detection method based on dynamic vision sensor chip

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Embodiment Construction

[0073] The present invention will be further described below in conjunction with specific embodiments.

[0074] The invention discloses a design of a photoelectric proximity sensor using a dynamic vision sensor (Dynamic Vision Sensor, DVS). Compared with the existing photoelectric proximity sensor, the present invention makes full use of the high time resolution and change sampling characteristics of the dynamic visual sensor, has the characteristics of high speed, high precision and low power consumption, and is suitable for integration in low-power portable electronic devices For short-distance ranging applications.

[0075] Such as figure 2 As shown, the proximity sensor proposed by the present invention belongs to the photoelectric ranging, including a controllable light source, a DVS sensor and a digital signal processing circuit. After the instantaneous light beam emitted by the controllable light source is reflected by the object, the light intensity change informati...

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Abstract

The invention provides a photoelectric proximity sensor based on a dynamic vision sensor (DVS) chip. A DVS is taken as a photoelectric induction device, and an instantaneous light beam emitted by a light source is sampled by the DVS after being reflected by a target. A reflection position D can be obtained by analyzing an AE flow output by the DVS, and a target distance H is calculated accordingly. By comparing identity change models of emitted light and reflected light, interference of an ambient light source and noise can be eliminated, and the accuracy is improved.

Description

technical field [0001] The invention belongs to the field of optoelectronics, in particular to a photoelectric proximity sensor based on multiple technologies such as bionic vision, image processing and circuit design. Background technique [0002] Proximity sensors (proximity switches) use a non-contact method to detect the movement information and distance between objects, and are widely used in automation equipment in packaging and printing, metal and plastic processing and other industrial fields. Typical applications include object proximity detection, Position detection, quality inspection and product counting etc. According to the working principle, proximity sensors can be divided into the following categories: [0003] (1) Electromagnetic induction type proximity sensor for detecting metal objects. Its main components include a high frequency oscillating circuit and an induction coil. When there is a metal object nearby, it will cause the induced current of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08G01S7/48
CPCG01S7/4808G01S17/08
Inventor 胡燕翔
Owner TIANJIN NORMAL UNIVERSITY
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