发明名称 |
AIRCRAFT FLIGHT DATA RECORDER DATA ACQUISITION SYSTEM |
摘要 |
A data acquisition system for use in an aircraft flight data recorder receives multiple analog and discrete signals representative of various aircraft parameters. A single address command from the flight data recorder central processing unit (CPU) causes a first multiplexer to select a set of analog signals. Each selected analog signal is amplified by a gain factor under CPU control and passed to track-and-hold circuitry which holds a level of the amplified analog signal upon receipt of a suitable command. The held analog signal levels are passed to a second multiplexer which also receives a set of discrete signals selected by a third multiplexer in response to a CPU address command. A control sequencer sequentially passes each signal at the input of the second multiplexer through an analog-to-digital converter, with the resultant digital signal being loaded into memory. After either all the selected and processed analog signals or the selected discrete signals have been analog-to-digital converted and stored in memory, the control sequencer issues an interrupt signal to the CPU. |
申请公布号 |
EP0171424(B1) |
申请公布日期 |
1990.05.30 |
申请号 |
EP19850901149 |
申请日期 |
1985.01.22 |
申请人 |
SUNDSTRAND DATA CONTROL, INC. |
发明人 |
STEPHENSON, EDWARD, A. |
分类号 |
G01C21/00;G01D9/00;G06F3/05;G06F17/00;G06F17/40 |
主分类号 |
G01C21/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|