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Time aligning method for 1553B data and ADC data in data collecting system

A data acquisition system, time alignment technology, applied in time division multiplexing system, data exchange through path configuration, electrical components, etc., can solve the problem of low accuracy of data extraction, 1553B and ADC data time cannot be aligned, ADC data Problems such as slow extraction speed, to achieve the effect of convenient post-processing data, avoiding errors, and small resources

Active Publication Date: 2014-08-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problem of slow data extraction speed and low accuracy of data extraction of 1553B and ADC within the required time period due to the unalignment of 1553B and ADC data in time. The present invention provides a data Time Alignment Method of 1553B Data and ADC Data in Acquisition System

Method used

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  • Time aligning method for 1553B data and ADC data in data collecting system

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Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode one: see figure 1 Describe this embodiment, the time alignment method of 1553B data and ADC data in a kind of data acquisition system described in this embodiment, it is realized based on following hardware acquisition system, this hardware acquisition system comprises 1553B monitoring card, communication card and Multiple data acquisition cards; the 1553B monitor card, communication card and multiple data acquisition cards share a backplane bus card to realize mutual communication.

[0023] The 1553B monitoring card is used to monitor the 1553B command, and the 1553B monitoring card is provided with a time counter, which is used to record the number of rising edges of the synchronous clock signal CLK, and use this number as the value of the time counter, as described The synchronous clock signal CLK is that the 1553B monitor card sends a clock signal generated by the PLL to the backplane bus card, and the PLL is a phase-locked loop or a pha...

specific Embodiment approach 2

[0033] Specific implementation mode two: see figure 1 Describe this embodiment, the difference between this embodiment and the time alignment method of 1553B data and ADC data in a data acquisition system described in the first embodiment is that the number of the data acquisition cards described is greater than or equal to 3 integer.

specific Embodiment approach 3

[0034] Specific implementation mode three: see figure 1 Describe this embodiment, the difference between this embodiment and the time alignment method of 1553B data and ADC data in a data acquisition system described in the first or second embodiment is that each of the data acquisition cards is provided with a A time counter, the time counter is used to record the number of rising edges of the synchronous clock signal CLK, and the frequency of the clock signal sent by the counter on each data acquisition card is higher than the frequency of the synchronous clock signal CLK.

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Abstract

The invention belongs to the field of data time aligning method, and discloses a time aligning method for 1553B data and ADC data in a data collecting system to solve the problems that due to the fact that in the prior art, 1553B data and ADC data cannot be aligned in time, the 1553 data and the ADC data are extracted slowly in the needed time quantum, and the accuracy of the extracted data is low. Firstly, all board cards are powered on at the same time, and all the data collecting cards do not carry out data collecting work within five seconds after being powered on; five seconds later when all the board cards are powered on, the 1553B monitoring card gives a synchronous clock signal CLK for time aligning, and at the same time, counters of all of the board cards begin to record the time information; the frame header information and the time information are synchronously recorded every time when the data collecting cards store a frame of data, or the message content and the time information are recorded every time when the 1553B monitoring card monitors a message. The time aligning method is specifically applied to the field of data collecting.

Description

technical field [0001] The invention belongs to the field of data time alignment methods. Background technique [0002] With the deepening of the development process of the aircraft, it is not only necessary to monitor the data on the 1553B bus, but also to record its various status signals after being converted into digital quantities by the analog-to-digital converter. In the process of processing various data of the aircraft afterwards, it is necessary to extract and process all the recorded signals on the aircraft within a certain period of time, so as to evaluate the performance of the aircraft. In order to locate accurately as soon as possible, an effective method for time-aligning 1553B data with ADC data needs to be designed in the data acquisition system. Contents of the invention [0003] The purpose of the present invention is to solve the existing problem of slow data extraction speed and low accuracy of data extraction of 1553B and ADC within the required tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L12/40
Inventor 徐红伟付宁王怀志乔立岩
Owner HARBIN INST OF TECH