| 摘要 |
A method and apparatus are provided for data storage in, for example, a black box for an aircraft. A static digital memory is divided into three portions, A, B and C. Data is read into successive sequential portions of wrap-around memory portion A. When an interrupt signal is received, e.g., due to a crash, the memory part A address to which the last data was input is entered into memory part B, along with an indication of which parameter was entered at that address. Data then is stored in sequential portions of memory part C until the end thereof is reached. To read the data, the last address to which data was entered in part A is read from memory part B, data is read from the position immediately following that entry to the end of part A, then from the beginning of part A through to the last entry. Data then is read from memory part C. The resultant data represents a period of time from shortly before, e.g., 0.3 ms, to some time, e.g., a couple of seconds, after the interrupt signal.
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