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Serial port-based ship radar echo data collecting method

A technology of radar echo and echo data, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of radar echo data loss, serial port receiving overflow, etc., to avoid loss, solve serial port data overflow, and ensure correctness and accuracy. The effect of stability

Inactive Publication Date: 2015-01-21
NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional collection method of marine radar echo data uses a Direct Memory Access (DMA) channel and a memory buffer to collect radar echo data, and transmits the radar echo data from the serial port to the In the memory buffer, but the interrupt processing function needs to be executed between the DMA channel transfer of a memory buffer size of data and the DMA interrupt being enabled for the next data transmission. Once the execution time of the interrupt processing function is too long, the serial port The radar echo data in the memory cannot be transmitted to the memory buffer in time, and the serial port receiving overflow will occur, resulting in the loss of radar echo data

Method used

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Examples

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Effect test

Embodiment 1

[0030] Embodiment 1: As shown in the figure, a method for collecting marine radar echo data based on a serial port, the data processing unit collects the radar echo data generated by the radar antenna unit, and the data processing unit includes a serial port, a DMA controller, Internal memory and data processing module, described serial port comprises receiving FIFO, and radar echo data is transmitted in memory from receiving FIFO by DMA controller, and serial port is the Mcbsp serial port of TI company, and the receiving FIFO (first-in-first-out buffer memory) of serial port The capacity is 128×32bit, the clock frequency of the serial port is 48MHz, the radar upper unit sends 3000 frames of radar echo data per second, and the size of each frame of radar echo data is 1KB, so the radar echo data rate is 3MB / s, specifically including The following steps:

[0031] S1. Configure the serial port as DMA receiving mode, set the threshold of receiving FIFO, and set the threshold to 64...

Embodiment 2

[0050] Embodiment two: as shown in the figure, a method for collecting marine radar echo data based on a serial port, the data processing unit collects the radar echo data generated by the radar antenna unit, and the data processing unit includes a serial port, a DMA controller, Internal memory and data processing module, described serial port comprises receiving FIFO, and radar echo data is transmitted in memory from receiving FIFO by DMA controller, and serial port is the Mcbsp serial port of TI company, and the receiving FIFO (first-in-first-out buffer memory) of serial port The capacity is 128×32bit, the clock frequency of the serial port is 48MHz, the radar upper unit sends 3000 frames of radar echo data per second, and the size of each frame of radar echo data is 1KB, so the radar echo data rate is 3MB / s, specifically including The following steps:

[0051] S1. Configure the serial port as DMA receiving mode, set the threshold of receiving FIFO, and set the threshold to ...

Embodiment 3

[0070] Embodiment three: as shown in the figure, a method for collecting marine radar echo data based on a serial port, the data processing unit collects the radar echo data generated by the radar antenna unit, and the data processing unit includes a serial port, a DMA controller, Internal memory and data processing module, described serial port comprises receiving FIFO, and radar echo data is transmitted in memory from receiving FIFO by DMA controller, and serial port is the Mcbsp serial port of TI company, and the receiving FIFO (first-in-first-out buffer memory) of serial port The capacity is 128×32bit, the clock frequency of the serial port is 48MHz, the radar upper unit sends 3000 frames of radar echo data per second, and the size of each frame of radar echo data is 1KB, so the radar echo data rate is 3MB / s, specifically including The following steps:

[0071] S1. Configure the serial port as DMA receiving mode, set the threshold of receiving FIFO, and set the threshold t...

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Abstract

The invention discloses a serial port-based ship radar echo data collecting method, wherein a data processing unit collects radar echo data generated by a radar antenna unit. The method is characterized in that two DMA (Direct Memory Access) channels are arranged for transmission of the radar echo data; and two buffer areas are correspondingly arranged for caching the radar echo data, and the two DMA channels can transmit the radar echo data alternately. The method has the advantages that through the use of the dual channel DMA transmission and the double buffering mechanism, the problem of serial port data overflow is effectively solved, losing of the radar echo data is avoided, the correctness and stability of radar echo data collection is ensured, so that high-speed, continuous radar echo data can be timely and highly efficiently transmitted to the data processing unit for processing.

Description

technical field [0001] The invention relates to a method for processing radar echo data, in particular to a method for collecting marine radar echo data based on a serial port. Background technique [0002] Marine radar is one of the necessary equipment for modern ship navigation system. Its main function is ship navigation, detection and avoidance of maritime obstacles. Modern marine radar is developing in the direction of high resolution and large display, resulting in a significant increase in the amount of radar echo data, and a corresponding increase in the transmission rate of radar echo data. At the same time, radar echo data is a continuous data stream. Radar echo data is the most important data of the entire radar system. All radar algorithms and processing are based on radar echo data. Therefore, it is extremely important to collect radar echo data reliably and efficiently. [0003] The working process of marine radar: the antenna unit of the radar generates radar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
Inventor 田丹李浩陈曦李浩泷高云志阎旭冉元进
Owner NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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