• THE DEVELOPMENT OF TELEMETRY SYSTEM IN CHINA

      Chengliang, Li; Qishan, Zhang; Beijing Univesity of Aeronautics and Astronautics (International Foundation for Telemetering, 1993-10)
      Telemetry as a research interest began to appear in the early days of this century. Since then it has gained great progress with its application fields growing all the time. This paper reviews briefly the history of telemetry introduces its state-of-the-art technology. The research activities and technological levels in this field inside China are included.
    • A New Approach to Telemetry Data Decomposition and Analysis Based on Large-Capacity Semiconductor RAM

      Jun, Zhang; Qishan, Zhang; Zhihui, Zhang; Jian, Huang; Beijing University of Aeronautics & Astronautics (International Foundation for Telemetering, 1993-10)
      With the development of microelectronics and computer technology, telemetry computer systems are demanded to provide larger storage capacity and higher storage data rate than ever before. This paper fully considers various factors of a high-speed PCM fiber-optic telemetry system such as data format, data rate, data storage, the width of data storage, storage data rate. All these considerations lead to a new scheme with a semiconductor RAM and a dedicated program as its basic idea. This scheme chooses 1Mbits or 4Mbits static-RAM chips to implement the telemetry data storage device with a total capacity of 4Mbytes, 16Mbytes, or 64Mbytes. The software running on COMPAQ 386/25M or its compatibles is written in Turbo C 2. 0 to fetch, decompose, display and process data stored in the large-capacity RAM. The main task of the system processing software is to identify the flag words of frame sync-code -pattern and then demultiplex the data into separate channel data to be stored in the disk. Besides the ability to recognize specific data format, the software can also rectify data confusion to some extent. The scheme has already been proved to be efficient to receive large capacity of data with features of high data rate, high data storage in a short time.