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Single-photon detector of shared digital converter

A single-photon detector and digital converter technology, applied in the field of photon detection, can solve the problems of unfavorable processing chip integration and large occupied area, and achieve the effects of high counting rate, reduced occupied area, and fast response speed

Active Publication Date: 2018-05-15
SHENZHEN TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, each SPAD needs to work with a TDC, which occupies a very large area, which is not conducive to the integration of processing chips.

Method used

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Embodiment Construction

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0050] The single-photon detector sharing the digital converter of the embodiment of the present invention can be applied to the on-board laser radar of unmanned vehicles.

[0051] Such as figure 1 As shown, the single-photon detector of the shared digitizer of the embodiment of the present invention includes N groups of single-photon detection circuits 30, N digitizers 20, and a main control processor 10, and the main control processor 10 and N groups of single-photon detection The circuit 30 is connected, and each group of single-photon detection circuits 30 is connected with a digitizer 20, and each group of single-photon detection circuits 30 includes a plurality of single-photon detection units, and a digitizer 20 ...

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Abstract

The invention relates to a single-photon detector of a shared digital converter. The single-photon detector comprises N groups of single-photon detection circuits, N digital converters and a main control processor. The main control processor is connected with the N groups of single-photon detection circuits, and each group of single-photon detection circuits is connected with one digital converter. Each group of single-photon detection circuits comprises a plurality of single-photon detection units, and one digital converter is connected with the plurality of single-photon detection units. Each group of single-photon detection circuits selects and switches on one single-photon detection unit corresponding to an enable control signal output by the main control processor, detects photons andgenerates a pulse signal to the digital converter upon receiving a photon. The digital converter calculates the time interval of photon transmission according to the pulse signal. The main control processor determines the distance between a target object and the detector through the time interval, and completes the detection. According to the detector, the column-sharing digital converter strategy is adopted, so that the light sensing efficiency and the integration degree of a chip are improved.

Description

technical field [0001] The present invention relates to the field of photon detection, and more particularly, to a single-photon detector sharing a digitizer. Background technique [0002] In recent years, unmanned driving technology has become a research hotspot, using various sensors to dynamically identify obstacles on the road, such as cars, bicycles and pedestrians. Due to the high detection accuracy of lidar, which is less affected by light, and can directly obtain the position information of obstacles, lidar is expected to become one of the important sensor systems for driverless cars. The lidars used by manufacturers such as Google and Audi and most research institutions reported in the current literature usually come from companies such as SILK, Velodyne, and UTM. The maximum range of these lidars is in the range of 30m-174m, the minimum accuracy is in the range of 1cm-10cm, and the frame rate is in the range of 10fps-20fps. Sensor pixels are 16×1, 32×1, 64×1, etc...

Claims

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Application Information

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IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 徐渊潘安谢刚黄志宇王育斌刘诗琪
Owner SHENZHEN TECH UNIV
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