CA2524997A1 - Range-finding system for a portable image reader - Google Patents
Range-finding system for a portable image reader Download PDFInfo
- Publication number
- CA2524997A1 CA2524997A1 CA002524997A CA2524997A CA2524997A1 CA 2524997 A1 CA2524997 A1 CA 2524997A1 CA 002524997 A CA002524997 A CA 002524997A CA 2524997 A CA2524997 A CA 2524997A CA 2524997 A1 CA2524997 A1 CA 2524997A1
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- CA
- Canada
- Prior art keywords
- reader
- range
- target
- distance
- portable image
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
Abstract
A range-finding system for a portable image reader is described. The range-finding system uses a distance-measuring device, such as an ultrasonic transducer, to determine the distance between the reader and a target, such as a label containing a bar code. An operator receives a visual indication which will assist in positioning the image reader within the optimal reading range of the target. The visual indicator may include three LED's of different color or with different blinking rates which will indicate to the operator that the reader is short, long or in the optimal reading range of the reader. In one embodiment, the reader would automatically cycle through an image acquisition or decode sequence when range finder detects that the target is within the optimal reading range of the reader. In another embodiment, the visual indicator will prompt the operator to manually trigger the image acquisition or decode sequence once the reader is positioned within the optimal reading range.
Claims (18)
1. A range-finding system for a portable image reader comprising:
a distance-measuring device to measure the distance of the portable image reader from a target;
- a memory for storing values representing at least one optimal range of optimal reading distances from the target;
- a processor for comparing the measured distance to the range of optimal reading distance values to determine whether the measured distance is within the optimal range, short of the optimal range or long of the optimal range;
- a visual indicator coupled to the processor for providing an operator a visual signal indicating that the reader is at a distance from the target within the optimal range, short of the optimal range or long of the optimal range;
and - wherein the processor is adapted to trigger an image acquisition cycle by the image reader to capture an image of the target when the reader is at a distance from the target within the optimal range.
a distance-measuring device to measure the distance of the portable image reader from a target;
- a memory for storing values representing at least one optimal range of optimal reading distances from the target;
- a processor for comparing the measured distance to the range of optimal reading distance values to determine whether the measured distance is within the optimal range, short of the optimal range or long of the optimal range;
- a visual indicator coupled to the processor for providing an operator a visual signal indicating that the reader is at a distance from the target within the optimal range, short of the optimal range or long of the optimal range;
and - wherein the processor is adapted to trigger an image acquisition cycle by the image reader to capture an image of the target when the reader is at a distance from the target within the optimal range.
2. The range-finding system for a portable image reader as claimed in claim 1 wherein the processor automatically triggers the image acquisition cycle when the reader is at a distance from the target within the optimal range.
3. The range-finding system for a portable image reader as claimed in claim 1 comprising an interface coupled to the processor and operable by an operator to initiate the triggering of the image acquisition cycle.
4. The range-finding system for a portable image reader as claimed in claim 1 comprising an interface coupled to the processor and operable by an operator to initiate the triggering of the image acquisition cycle only when the reader is at a distance from the target within the optimal range.
5. The range-finding system for a portable image reader as claimed in claim 1 wherein the memory stores values representing a number of ranges of optimal reading distances from the target for a number of different applications for the image reader.
6. The range-finding system for a portable image reader as claimed in claim 5 comprising an interface coupled to the processor and operable by the operator to select a desired range from the ranges of optimal reading distances.
7. The range-finding system for a portable image reader as claimed in claim 1, wherein the distance measuring device comprises an ultrasonic transducer.
8. The range-finding system for a portable image reader as claimed in claim 1, wherein the visual indicator comprises three light sources, a first light source adapted to illuminate when the reader is at a distance from the target long of the optimal range, a second light source adapted to illuminate when the reader is at a distance from the target within the optimal range, and a third light source adapted to illuminate when the reader is at a distance from the target short of the optimal range.
9. The range-finding system for a portable image reader as claimed in claim 8 wherein each light source displays a different color light.
10. The range-finding system for a portable image reader as claimed in claim 8 wherein each light source blinks at a different rate.
11. The range-finding system for a portable image reader as claimed in claim 1, wherein the visual indicator comprises a light source, wherein the light source is adapted to blink at a first rate when the reader is at a distance from the target long of the optimal range, adapted to blink at a second rate when the reader is at a distance from the target within the optimal range, and adapted to blink at a third rate when the reader is at a distance from the target short of the optimal range.
12. The range-finding system for a portable image reader as claimed in claim 1, wherein the portable image reader is adapted to read a bar code symbol.
13. A method of operating a portable image-reader comprising the steps of:
a. positioning the image reader before a target;
b. measuring the distance of the portable image reader from the target;
c. comparing the measured distance with an optimal range of reading distances from the target;
d. providing a first visual indication when the measured distance is within the optimal range;
e. triggering an image acquisition cycle by the image reader when the measured distance is within the optimal range;
f. providing a further visual indication when the measured distance is not within the optimal range;
g. moving the portable image reader towards a position within the optimal range; and h. repeating steps b. to g. until the image acquisition cycle by the image reader is triggered.
a. positioning the image reader before a target;
b. measuring the distance of the portable image reader from the target;
c. comparing the measured distance with an optimal range of reading distances from the target;
d. providing a first visual indication when the measured distance is within the optimal range;
e. triggering an image acquisition cycle by the image reader when the measured distance is within the optimal range;
f. providing a further visual indication when the measured distance is not within the optimal range;
g. moving the portable image reader towards a position within the optimal range; and h. repeating steps b. to g. until the image acquisition cycle by the image reader is triggered.
14. The method operating a portable image-reader as claimed in claim 13 wherein step f. comprises:
f.1. providing a second visual indication when the measured distance is long of the optimal range; or f.2. providing a third visual indication when the measured distance is short of the optimal range.
f.1. providing a second visual indication when the measured distance is long of the optimal range; or f.2. providing a third visual indication when the measured distance is short of the optimal range.
15. The method operating a portable image-reader as claimed in claim 14 wherein step g. comprises:
g.1. moving the portable image reader closer to the target when the second visual indication is provided; or g.2. moving the portable image reader away from the target when the third visual indication is provided.
g.1. moving the portable image reader closer to the target when the second visual indication is provided; or g.2. moving the portable image reader away from the target when the third visual indication is provided.
16. The method operating a portable image-reader as claimed in claim 13 wherein step c. comprises:
c.1. selecting the optimal range of reading distances from the target from a number of possible optimal ranges for the portable reader.
c.1. selecting the optimal range of reading distances from the target from a number of possible optimal ranges for the portable reader.
17. The method operating a portable image-reader as claimed in claim 13 wherein step e. comprises:
e.1. automatically triggering the image acquisition cycle by the image reader when the measured distance is within the optimal range.
e.1. automatically triggering the image acquisition cycle by the image reader when the measured distance is within the optimal range.
18. The method operating a portable image-reader as claimed in claim 13 wherein step e. comprises:
e.1. manually triggering the image acquisition cycle by the image reader when the measured distance is within the optimal range.
e.1. manually triggering the image acquisition cycle by the image reader when the measured distance is within the optimal range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/066,129 US7416127B2 (en) | 2005-02-24 | 2005-02-24 | Range-finding system for a portable image reader |
| US11/066,129 | 2005-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2524997A1 true CA2524997A1 (en) | 2006-08-24 |
| CA2524997C CA2524997C (en) | 2011-01-04 |
Family
ID=36911637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2524997A Active CA2524997C (en) | 2005-02-24 | 2005-11-01 | Range-finding system for a portable image reader |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US7416127B2 (en) |
| CA (1) | CA2524997C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4389812B2 (en) * | 2005-03-03 | 2009-12-24 | 株式会社デンソーウェーブ | Optical information reader |
| US9247215B1 (en) * | 2005-04-22 | 2016-01-26 | Custom Manufacturing & Engineering, Inc. | Laser sensor system |
| KR20070002567A (en) * | 2005-06-30 | 2007-01-05 | 삼성전자주식회사 | Cooker with bar code scanner and control method thereof |
| JP4793179B2 (en) * | 2005-11-14 | 2011-10-12 | オムロン株式会社 | Authentication device and portable terminal |
| US7769345B2 (en) * | 2006-09-29 | 2010-08-03 | Sony Ericsson Mobile Communications Ab | Device and method for guiding a user to a communication position |
| US20080093457A1 (en) * | 2006-10-19 | 2008-04-24 | Dayou Wang | Imaging reader and method with visual aiming prompts |
| US8194254B2 (en) * | 2007-01-30 | 2012-06-05 | Hewlett-Packard Development Company, L.P. | Print device preconditioning |
| EP2101281B1 (en) * | 2007-03-27 | 2014-02-26 | Casio Computer Co., Ltd. | Bar-code reading apparatus and computer-readable medium |
| WO2008147349A1 (en) * | 2007-05-25 | 2008-12-04 | Hewlett-Packard Development Company, L.P. | Identifying sensor and print device |
| US20090033950A1 (en) * | 2007-07-30 | 2009-02-05 | Hewlett-Packard Development | Printhead preconditioning trigger |
| US8152069B2 (en) * | 2007-12-28 | 2012-04-10 | Metrologic Instruments, Inc. | Dual focus imaging based symbology reading system |
| US20100127081A1 (en) * | 2008-11-25 | 2010-05-27 | Metrologic Instruments, Inc. | Targeting scheme for dataform readers |
| JP5053396B2 (en) * | 2010-02-15 | 2012-10-17 | 東芝テック株式会社 | Code symbol reader and its control program |
| WO2011152825A1 (en) | 2010-06-02 | 2011-12-08 | Hewlett-Packard Development Company, L.P. | Tension module for wide format inkjet printers |
| US8678274B1 (en) | 2012-08-30 | 2014-03-25 | Symbol Technologies, Inc. | Point-of-transaction checkout system for and method of processing targets electro-optically readable by a clerk-operated workstation and by a customer-operated accessory reader |
| US9842239B2 (en) * | 2016-03-14 | 2017-12-12 | Datalogic Ip Tech S.R.L. | Presentation scanner with user interface to provide feedback about object and code indicia position relative to a scanning volume |
| US20230014003A1 (en) * | 2019-12-20 | 2023-01-19 | Hewlett-Packard Development Company, L.P. | Integrated fluid ejection and imaging |
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| US5668364A (en) | 1985-02-28 | 1997-09-16 | Symbol Technologies, Inc. | Target finder in electro-optical scanners |
| US6000617A (en) | 1985-02-28 | 1999-12-14 | Symbol Technologies, Inc. | Hand-held scanning head having auditory beeper with a changeable beeping rate |
| US5576529A (en) | 1986-08-08 | 1996-11-19 | Norand Technology Corporation | Hand-held optically readable information set reader focus with operation over a range of distances |
| US4877949A (en) | 1986-08-08 | 1989-10-31 | Norand Corporation | Hand-held instant bar code reader system with automated focus based on distance measurements |
| US5340973A (en) * | 1990-09-17 | 1994-08-23 | Metrologic Instruments, Inc. | Automatic laser scanning system and method of reading bar code symbols using same |
| JP2910253B2 (en) | 1991-01-09 | 1999-06-23 | 住友電気工業株式会社 | Laser beam scanning device |
| CA2056272C (en) | 1991-06-14 | 2001-10-16 | Patrick Salatto, Jr. | Combined range laser scanner |
| US5902988A (en) | 1992-03-12 | 1999-05-11 | Norand Corporation | Reader for decoding two-dimensional optically readable information |
| US5672858A (en) | 1994-06-30 | 1997-09-30 | Symbol Technologies Inc. | Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology |
| US5773811A (en) | 1994-10-11 | 1998-06-30 | Schramm, Jr.; Harry F. | Method for marking, capturing and decoding machine-readable matrix symbols using ultrasound imaging techniques |
| US5665956A (en) | 1994-10-31 | 1997-09-09 | Psc Inc. | Bar code reading and data collection unit with ultrasonic wireless data transmission |
| US6206288B1 (en) | 1994-11-21 | 2001-03-27 | Symbol Technologies, Inc. | Bar code scanner positioning |
| DE69920969T2 (en) | 1998-12-03 | 2005-10-20 | Metrologic Instruments Inc. | Automatically activated, portable laser bar code scanner with data transfer device |
| US6634554B1 (en) | 2000-02-23 | 2003-10-21 | Telxon Corporation | System and method employing a piezoelectric reflector for optimizing the focus of a dataform reader |
-
2005
- 2005-02-24 US US11/066,129 patent/US7416127B2/en active Active
- 2005-11-01 CA CA2524997A patent/CA2524997C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2524997C (en) | 2011-01-04 |
| US7416127B2 (en) | 2008-08-26 |
| US20060186205A1 (en) | 2006-08-24 |
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