초록 ▼

A data processing system for use in a solid state flight data recorder wherein a plurality of aircraft parameter signals are processed and stored in electronic memory for later retrieval. The processor identifies those aircraft parameter data signals to be stored and for each such datum signal produ

A data processing system for use in a solid state flight data recorder wherein a plurality of aircraft parameter signals are processed and stored in electronic memory for later retrieval. The processor identifies those aircraft parameter data signals to be stored and for each such datum signal produces a signal triplet comprised of a parameter label signal, a time tag signal representative of the time interval from a reference time within which the data signal was produced, and the datum signal. A frame of the data bit stream produced by the data processor for storage in the memory includes an initial reference time signal followed at fixed intervals by time tick signals. Each signal triplet is positioned in the data bit stream following that initial reference time signal or time tick signal to which its time tag signal is referenced. By so tiering the data time formatting a substantial compression of data is realized thereby reducing memory size requirements.

대표청구항 ▼

In an aircraft flight data recorder system of the type wherein a plurality of input data signals that represent the status of corresponding aircraft parameters are periodically processed to provide a series of data frames with each data frame representing the status of selected ones of said aircraft

In an aircraft flight data recorder system of the type wherein a plurality of input data signals that represent the status of corresponding aircraft parameters are periodically processed to provide a series of data frames with each data frame representing the status of selected ones of said aircraft parameters at particular points in time and with each data frame providing aircraft parameter status and associated time information that is stored in a memory device of the flight data recorder system for later retrieval therefrom, the improvement comprising: (a) means for periodically producing within each data frame at least one reference time signal representative of elapsed time from a predetermined initial point in time; (b) means for sequentially determining, in accordance with a predetermined program, whether a signal representative of an input datum signal of said plurality of input data signals is to be included in a data frame, said means for sequentially determining including: (i) means for producing for each input datum signal to be represented in said data frames a label signal representative of the aircraft parameter corresponding to the input datum signal, (ii) means for producing for each said datum signal to be represented in said data frame, a time tag signal that is referenced to said reference time signal and is representative of a time interval within which the datum signal was produced, and (iii) means for producing for each said input datum signal to be represented in said data frame, a datum value signal representative of the input datum signal.