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A daisy-chain structure data acquisition system and adaptive transmission method

A data acquisition system and adaptive transmission technology, applied in the field of data transmission, can solve problems such as bandwidth waste, achieve the effects of increasing flexibility, reducing costs, and improving flight test efficiency

Active Publication Date: 2022-07-15
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the potential demand, the system must consider the most extreme case - all asynchronous parameter outputs peak at the same time, and the bandwidth needs to be allocated according to the peak value during configuration, resulting in potential waste of bandwidth

Method used

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  • A daisy-chain structure data acquisition system and adaptive transmission method
  • A daisy-chain structure data acquisition system and adaptive transmission method
  • A daisy-chain structure data acquisition system and adaptive transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A data acquisition system with a daisy-chain structure, such as figure 1 As shown, it includes an analog signal collector, a flight control parameter signal collector, an avionics bus collector, and a GPS collector connected in a daisy chain. The signal collector is connected with the on-board flight control output interface, the avionics bus collector is connected with the on-board avionics interface, and the GPS collector is connected with the on-board GPS antenna.

[0030] The present invention designs a single collector, and each unit is provided with a separate collection circuit. Each collector packs the collected data with UDP and sends it. All collectors are connected in a daisy chain, and each collector is regarded as a node in the daisy chain. The invention adopts a decentralized test data transmission structure, which can meet the collection and recording of sensor parameters, avionics parameters, GPS parameters and flight control parameters in flight tests...

Embodiment 2

[0032] This embodiment is optimized on the basis of Embodiment 1. The devices of the present invention are connected in a daisy-chain manner, and each device has two Gigabit Ethernet network ports. The network port undertakes the functions of data transmission and data reception. The network communication module includes:

[0033] a. Network PHY driver;

[0034] b. Network MAC logic;

[0035] c. Network application layer logic;

[0036] d. Network data receiving buffer management;

[0037] e. Network data sending buffer management;

[0038] f. IEEE1588 main role logic;

[0039] g. IEEE1588 slave role logic.

[0040] The invention adopts a decentralized test data transmission structure, which can meet the collection and recording of sensor parameters, avionics parameters, GPS parameters and flight control parameters in flight tests. The test system of the present invention does not need a transmission main control module for bandwidth allocation and transmission timing c...

Embodiment 3

[0043] This embodiment is optimized on the basis of Embodiment 1 or 2. The functional components of a single data acquisition module are as follows: figure 2As shown, the system box completes the basics of device networking, output and transmission control, data recording, and user interface, and is an essential box for the device. On these basis, the system box contains specific synchronous parameter / asynchronous parameter collection modules according to the specific functions of the collector.

[0044] The multi-function box is designed to expand the acquisition capability of the system box. For analog acquisition, the designed multi-function box is 8-channel analog acquisition and excitation output. If it is a flight control / avionics / GPS collector, you can continue to add bus and digital signal acquisition.

[0045] like figure 2 As shown, the system frame includes a system frame control module, a setup management module, a file management module, a system frame communi...

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PUM

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Abstract

The invention discloses a data acquisition system with a daisy chain structure, comprising an analog signal collector, a flight control parameter signal collector, an avionics bus collector, and a GPS collector connected in a daisy chain. The flight control parameter signal collector The avionics bus collector is connected to the onboard avionics interface, and the GPS collector is connected to the onboard GPS antenna. The invention can meet the collection and recording of sensor parameters, avionics parameters, GPS parameters and flight control parameters in flight tests. The invention also discloses an adaptive transmission method of a daisy-chain structure. The invention adopts a daisy-chain structure, in which there is no main control unit, and each test unit automatically negotiates bandwidth to transmit data according to transmission requirements; Adapt to allocate bandwidth for synchronous parameter and asynchronous parameter transmission, improve system reliability and bandwidth utilization, and improve system flexibility.

Description

technical field [0001] The invention belongs to the technical field of data transmission, and particularly relates to a daisy chain structure data acquisition system and an adaptive transmission method. Background technique [0002] During the test flight of the aircraft, it is necessary to collect the test parameters of the test aircraft in real time. The collected parameters are collected by the collector and divided into two paths. One path is used for real-time monitoring by the test ground station through the telemetry link to ensure the safety of the test flight; the other path is performed by the onboard recorder. Recorded for post hoc analysis. [0003] According to the classification of the synchronization method of the collected signals, the flight test parameters can be divided into two types: synchronous parameters and asynchronous parameters. Synchronous parameters are periodic regular signals (such as analog signals output by sensors), the acquisition system c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/16G06F13/42
CPCG06F13/4247G06F13/1673G06F13/1678
Inventor 徐杨明杨地
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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