Optical reader, optical reading method and optical reading system
AssigneeKeyence Corporation
InventorsHirokazu Tsunobuchi, Hideki Hashimoto
Life of this patent
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Abstract
An optical reader for optically reading recorded code data and determining whether the reading is successful or not. In the optical reader, a frequency of coincidence of read data from start of reading is compared with a predetermined reference frequency when it is determined that the reading is successful after the reading of the code data is repeatedly tried to determine a stability of reading, so that a signal showing a result of the determination is output.
Claims18
An optical reader for optically reading recorded code data and determining whether the reading is successful or not, comprising:
- a light emitting means for emitting light to an object having code data;
- a light receiving means for receiving said light reflected on said code data of said object;
- and
- a stability determination means for comparing a frequency of coincidence of read code data from start of reading with a predetermined reference frequency when a determination is made that the reading is successful after the reading of the code data is repeatedly tried, determining a stability of reading and outputting a signal showing a result of the determination.
An optical reader for optically reading recorded code data and determining whether the reading is successful or not, comprising:
- a light emitting means for emitting light to an object having code data;
- a light receiving means for receiving said light reflected on said code data of said object;
- and
- a stability determination means for comparing time which elapses from start of reading until read data is coincided by a predetermined frequency with predetermined reference time when a determination is made that the reading is successful after the reading of the code data is repeatedly tried, determining a stability of reading and outputting a signal showing a result of the determination.
An optical reading system for optically reading recorded code data and determining whether the reading is successful or not, comprising:
- an optical reading means comprising
- a light emitting means for emitting light to an object having code data, and
- a light receiving means for receiving said light reflected on said code data of said object;
- a stability determination means for comparing a frequency of coincidence of read code data from start of reading with a predetermined reference frequency when a determination is made that the reading is successful after the reading of the code data is repeatedly tried, determining a stability of reading and outputting a signal showing a result of the determination;
- and
- a control means for inputting the output signal of said stability determination means.
An optical reading method comprising the steps of:
- optically reading recorded code data of an object;
- determining whether the reading is successful or not,
- wherein when the reading of the code data is carried out, the reading activity is done repeatedly;
- comparing a frequency of coincidence of read data from start of reading with a predetermined reference frequency;
- determining a result of stability of reading based on the comparison when the reading is successful;
- and
- outputting an output signal indicating the result of the determination.
An optical reading method comprising the steps of:
- optically reading recorded code data of an object by a plurality of optical reading devices;
- determining whether the reading is successful or not,
- wherein when the reading of the code data is carried out, the reading activity is done repeatedly;
- comparing a frequency of coincidence of read data from start of reading with a predetermined reference frequency;
- determining a result of stability of reading based on the comparison when the reading is successful,
- wherein when the result of determination that stability is low is output from a plurality of optical reading devices in reading the same data, a determination is made that a specified code data is erroneous;
- and
- outputting an. output signal indicating the result of the determination and the specified code data.
An optical reading method comprising the steps of:
- optically reading recorded code data of an object by a plurality of optical reading devices;
- determining whether the reading is successful or not,
- wherein when the reading of the code data is carried out, the reading activity is done repeatedly;
- comparing a frequency of coincidence of read data from start of reading with a predetermined reference frequency;
- determining a result of stability of reading based on the comparison when the reading is successful,
- wherein when the result of determination that stability is low is output from the same optical reading device irrespective of code data, a determination is made that the same optical reading device fails;
- and
- outputting an output signal indicating the result of the determination and the same optical reading device.
Dependencies are inferred from the claim text.