Bar code for measuring distance and position
First Claim
1. A 2 of 9 bar code system for representing 10 characters, each character comprising;
- a set of barcode digits comprising two bars and one space;
the total width of the bars and spaces shall be 9x; and
, each bar and space having a width that is at least 2x and no greater than 5x.
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Abstract
A bar code able to measure distance or position having an encoded index point and additive and subtractive delineation bars to adjust the value of the index point.
The numeric code has 10 characters in its set, each character having two dark bars in nine modules or a “Two of Nine Code”. All bars or gaps of this code are a minimum of two modules in width. Each Numeric Digit may have and OCR (Optical Character Recognition) digit embedded into the barcode digit to make it human and machine readable.
A bar code reader would read an index block and both an additive and a subtractive block. The value of the additive block is added and the subtractive block subtracted from the index block to give a true value of the position or distance.
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Citations
42 Claims
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1. A 2 of 9 bar code system for representing 10 characters, each character comprising;
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a set of barcode digits comprising two bars and one space;
the total width of the bars and spaces shall be 9x; and
,each bar and space having a width that is at least 2x and no greater than 5x. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A positioning and measuring system comprising:
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a bar code array including a first reference point, the first reference point having an additive side and a subtractive side;
a plurality of additive bar code symbols on the additive side of the first reference point;
a plurality of subtractive bar code symbols on the subtractive side of the first reference point;
a reader defining a measuring field with first and second field edges; and
the reader adapted to detect additive bar code symbols between a first edge of the measuring field and the first reference point, and to detect subtractive bar code symbols between a second edge of the measuring field and the first reference point, and to identify a point of measurement along the bar code array therefrom. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A positioning and measuring system comprising:
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a bar code array including a first reference point and a second reference point;
a plurality of bar code symbols between the first and second reference points;
a reader defining a target point;
the reader adapted to detect a first number of bar code symbols between the first reference point and the target point and to determine a position of the target therefrom; and
,the reader adapted to detect a second portion of bar code symbols between the second reference point and the target point and to determine a position of the target therefrom. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A positioning and measuring system comprising:
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a bar code array including a plurality of spaced-apart reference points, each reference point having an additive side and a subtractive side;
a plurality of bar code symbols between the reference points, the bar code symbols shall be additive to the additive side of each reference point and subtractive to the subtractive side of each reference point;
a reader defining a target point;
the reader adapted to detect a number of subtractive bar code symbols between the target point and a reference point having a subtractive side nearest to the target point and to determine a position of the target point therefrom; and
,the reader adapted to detect a number of additive bar code symbols between the target point and a reference point having a additive side nearest to the target point and to determine a position of the target point therefrom. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification