Method and apparatus for reading free falling dosimeter punchcodes
A punchcode reader is provided for reading data encoded in a punchcode hole array on a dosimeter. The dosimeter falls through a passage in the reader containing photosensor detectors disposed along the passage which provide output signals to a microprocessor. The signals are processed to determine the orientation of the dosimeter in the reader, the location and state of punchcode holes in a two row array thereby decoding the encoded data. Multiple rate of fall calculations are made, and if appropriate matching of the punchcode array is not obtained in three tries, an error signal is output to the operator. The punchcode reader also provides for storage of data from multiple dosimeters passed through the reader, and for the output of decoded data to an external display or a computer for further processing. 8 figs.
- DOE Contract Number:
- AC04-76DP03533
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5173595; A
- Application Number:
- PPN: US 7-560667
- OSTI ID:
- 7310303
- Resource Relation:
- Patent File Date: 31 Jul 1990
- Country of Publication:
- United States
- Language:
- English
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Punchcode reader system for dosimeters
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