Flag generation system
AssigneeSun Electric Corporation
InventorsKarl R. Bahnick, James H. Johnson
Life of this patent
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Abstract
An engine analyzer includes an A/D converter for sampling analog data from an engine under test and developing digital data consisting of 11 magnitude bits and a sign bit. Four flag bits are added to make a digital word of sixteen bits with the four added bits being equal to the sign bit. Flags are set by making their bit value opposite to that of the sign bit. The sixteen bit words are stored in a RAM memory and the presence of the flags enables ready identification and retrieval of the data.
Claims14
A method of operating an engine analyzer comprising the steps of:
- developing signal data acquired from an engine under test into digital data of a fixed number of bits;
- adding an identifying digital flag to said digital data in the form of an added bit in a bit position that is different from any of the bit positions of the bits in said fixed number of bits to identify the type of said signal data;
- and
- storing said signal data and said digital flag in a memory.
For use with an engine analyzer:
- means for acquiring signal data from an engine under test;
- means for converting said acquired signal data into a fixed number of digital data bits;
- means for combining a sign bit and one or more flag bits with said digital data to form a digital word;
- and
- means for setting a flag bit for identifying the type of said signal data by making the bit value of said flag bit opposite to that of said sign bit;
- and
- means for storing said digital word in a RAM memory.
A method of operating an engine analyzer comprising the steps of:
- acquiring analog signal data from an engine under test;
- converting the analog signal data into digital data of a fixed number of bits including a sign bit denoting polarity of said signal data;
- adding an identifying digital flag to said digital data in a bit that has a higher order of significance than any of said bits other than said sign bit in said fixed number of bits to identify the type of said analog signal data;
- and
- storing said digital data and said digital flag in a memory.
An engine analyzer comprising:
- means for acquiring analog signal data from an engine under test;
- means for converting said analog signal data into digital data bits and a digital sign bit denoting a polarity of said signal data;
- means for developing a digital flag bit identifying the type of said signal data;
- means for combining said digital flag bit, said digital data bits and said digital sign bit into a word with said digital data bits comprising bits having a lower order of significance in said word than said digital flag bit;
- and
- means for storing said digital word in a RAM memory.
A method of operating an engine analyzer comprising the steps of:
- developing signal data acquired from an engine under test into digital data of a fixed number of bits;
- adding one or more redundant bits in bit positions different from any of the bit positions of the bits in said fixed number of bits, to said fixed number of bits to form a digital word;
- selectively reversing one or more of said redundant bits to flag said digital data to identify the type of said signal data;
- and
- storing said digital words with said flagged digital data in a memory.
Dependencies are inferred from the claim text.