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DDR4 memory for laser radar

A DDR4 and lidar technology, applied in the field of DDR4 memory, can solve the problem that the processing frame rate of lidar cannot meet the design indicators, and achieve the effect of improving signal transmission characteristics

Pending Publication Date: 2020-08-25
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the huge amount of point cloud data, if the computing power of the main chip is not enough, or the DDR4 data transmission rate and other conditions cannot meet the requirements, the lidar processing frame rate will not meet the design specifications.

Method used

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  • DDR4 memory for laser radar
  • DDR4 memory for laser radar
  • DDR4 memory for laser radar

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0034] DDR4 is the current mainstream memory standard. In DDR4, the types of signals involved in the interaction between the control unit and the storage unit include clock signals (Clock Signals), address signals (Address Signals), command signals (CommandSignals), and control signals (Control Signals). , Data Signals (Data Signals) and other signals (OtherSignals).

[0035] In this embodiment, the address signal path, clock signal path, and data signal path in the DDR4 PCB are mainly redesigned to improve the qu...

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Abstract

The invention discloses a DDR4 memory for a laser radar. The memory comprises a control chip and a plurality of memory units, the control chip is electrically connected with each memory unit. In an address signal path, one memory unit is connected with a first terminating resistor through a first strip line; the resistance of the first strip line is the same as that of the first terminating resistor; and a differential clock signal path, one memory unit is connected with the control chip through a group of second strip lines; wherein one memory unit is connected with the two-terminal resistorand the third-terminal resistor through a group of third strip lines, every two memory units are connected through a group of fourth strip lines, the resistance values of the second strip lines and the third strip lines are the same, and the resistance values of the second terminal resistor and the third terminal resistor are the same.

Description

technical field [0001] Embodiments of the present invention relate to storage technology, and in particular to a DDR4 memory used for lidar. Background technique [0002] With the advancement of intelligent network technology, self-driving cars are gradually becoming popular in the market. LiDAR is an important sensor in high-level autonomous vehicles. Lidar emits a laser beam to the target object, and then determines the distance of the target object according to the time difference between reception and reflection, and deduces the position information of the object according to the distance and the angle of laser emission. In actual use, the collection of coordinates of all reflection points collected by lidar is called point cloud. Usually, the 16-line lidar has to process 300,000 points per second; the 32-line lidar has to process 700,000 points per second; the 64-line lidar has to process 2.2 million points per second. [0003] When the point cloud data needs to be p...

Claims

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Application Information

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IPC IPC(8): G06F13/16H05K1/02
CPCG06F13/1668H05K1/0228
Inventor 王祎帆王杨隋建鹏赵晓雪王宗罡
Owner CHINA FIRST AUTOMOBILE
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