A High Bit Rate Data Acquisition and Transmission System Based on Star Topology Architecture

Abstract

The invention relates to a high bit rate data acquisition and transmission system based on a star topology framework. The system comprises a sensor, acquiring and editing units and a central processing unit (CPU), wherein the sensor is used for sensing physical parameters of a measured object, converting the physical parameters into electrical signals and outputting the electrical signals into the acquiring and editing units; the acquiring and editing units adopting an integral design are used for completing power supply of the sensor and signal acquiring and encoding, conditioning the received electrical signals, processing the electrical signals by input filtering, amplification, sampling and analog to digital (A / D) conversion, and transmitting the processed signals into the CPU; the CPU is used for carrying out sequential control on the acquiring and editing units through a control bus so as to enable the acquiring and editing units to output data according to the preset logic, and also used for processing received data output from the plurality of acquiring and editing units in a centralized way, framing the data according to the prescribed form, converting parallel signals into serial signals and outputting the signals into modulation and transmitting equipment. The centralized control and synchronous acquisition method is adopted by the system, so that the system is easy to maintain, automatic fault isolation is realized, and the purposes of synchronous working of the plurality of acquiring and editing units and high bit rate data transmission can be effectively realized.

Description

technical field [0001] The invention belongs to the field of data communication, and relates to a high bit rate data acquisition and transmission system based on a star topology structure. Background technique [0002] In the development and test flight stage of the aircraft, the measurement and control communication system is used to obtain the working state parameters and environmental data of the various systems inside the aircraft, and provide a basis for evaluating the performance of the aircraft and conducting fault analysis. The performance of the measurement and control communication system directly affects the development process and cost of the aircraft, and affects the improvement and improvement of the performance of the aircraft. At present, when the measurement and control communication system collects data, it often relies on the high-precision crystal oscillators on the respective acquisition devices to achieve data synchronization on different devices. In t...

AI Technical Summary

Problems solved by technology

At present, when the measurement and control communication system collects data, it often relies on the high-precision crystal oscillators on the respective acquisition devices to realize data synchronization on different devices. The time error caused by the large-area symbol bias in the transmission process resulted in a high data bit error rate; when the existing measurement and control communication system collects telemetry parameters, each parameter is not isolated. It is no longer applicable when the telemetry parameters have special isolation requirements; in the composition of the traditional measurement and control communication system, special equipment is configured to supply power to the sensor, and the data acquisition and editing unit only collects the output data of the sensor. This method makes the connection of the transmission wire complicated and increases Cable Network Design Difficulty

Images