Patent ID: 11890096
Assignee: CIVIL AVIATION UNIVERSITY OF CHINA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. The method according to claim 1, wherein in step 3), assigning each frequency in each group of the frequency combinations with the stroke of the 8-shaped digital frame as described in step 3) is specifically as follows:
(1) for the first group of the frequency combinations:
the third vertical stroke and the fourth vertical stroke are given the first frequency; the first horizontal stroke is given the second frequency; the second horizontal stroke and the third horizontal stroke are given the third frequency; the first vertical stroke is given the fourth frequency; and the second vertical stroke is given the fifth frequency;
(2) for the second group of the frequency combinations:
the third vertical stroke and the fourth vertical stroke are given the sixth frequency; the first horizontal stroke is given the seventh frequency; the first vertical stroke, the second vertical stroke and the third horizontal stroke are given the eighth frequency; and the second horizontal stroke is given the ninth frequency;
(3) for the third group of the frequency combinations:
the third vertical stroke and the fourth vertical stroke are given the tenth frequency; the first vertical stroke and the second horizontal stroke are given the eleventh frequency; the first horizontal stroke and the third horizontal stroke are given the twelfth frequency; and the second vertical stroke is given the thirteenth frequency;
(4) for the fourth group of the frequency combinations:
the first horizontal stroke, the third vertical stroke and the fourth vertical stroke are given the fourteenth frequency; the second horizontal stroke and the third horizontal stroke are given the fifteenth frequency; the first vertical stroke is given the sixteenth frequency; and the second vertical stroke is given the seventeenth frequency;
(5) for the fifth group of the frequency combinations:
the first horizontal stroke, the second horizontal stroke, the third horizontal stroke, the first vertical stroke and the fourth vertical stroke are given the eighteenth frequency; the second vertical stroke is given the nineteenth frequency; and the third vertical stroke is given the twentieth frequency;
(6) for the sixth group of the frequency combinations:
the first horizontal stroke, the second horizontal stroke, the third horizontal stroke, the first vertical stroke and the fourth vertical stroke are given the twenty-first frequency; the third vertical stroke is given the twenty-second frequency; and the second vertical stroke is given the twenty-third frequency;
(7) for the seventh group of the frequency combinations:
the third vertical stroke and the fourth vertical stroke are given the twenty-fourth frequency; the first horizontal stroke, the third horizontal stroke, the first vertical stroke and the second vertical stroke are given the twenty-fifth frequency; and the second horizontal stroke is given the twenty-sixth frequency;
(8) for the eighth group of the frequency combinations:
the first horizontal stroke, the second horizontal stroke, the third horizontal stroke, the second vertical stroke and the third vertical stroke are given the twenty-seventh frequency; and the first vertical stroke and the fourth vertical stroke are given the twenty-eighth frequency;
(9) for the ninth group of the frequency combinations:
the first horizontal stroke, the second horizontal stroke, the third horizontal stroke, the first vertical stroke and the fourth vertical stroke are given the twenty-ninth frequency; and the second vertical stroke and the third vertical stroke are given the thirtieth frequency;
(10) for the tenth group of the frequency combinations:
the first horizontal stroke, the third vertical stroke and the fourth vertical stroke are given the thirty-first frequency; and the second horizontal stroke, the third horizontal stroke, the first vertical stroke, and the second vertical stroke are given the thirty-second frequency.