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US 9,297,900 B2Granted
Code symbol reading system having adjustable object detection
AssigneeHand Held Products, Inc.
InventorTing Jiang
Life of this patent
Estimating the term…
Abstract
A code symbol reading system is provided. The code symbol reading system has an object detection subsystem that can be configured to detect only those objects that are positioned at a specified distance from the system. The object-detection subsystem thereby initiates the scanning process only when an object is detected at substantially the specified distance from the system.
Claims20
A system for reading code symbols, comprising:
- a code-symbol-capturing subsystem for acquiring information about code symbols within the code-symbol-capturing subsystem's field of view, the code-symbol-capturing subsystem comprising a receiving sensor for receiving reflected signals of electromagnetic radiation;
- an object-detection subsystem for detecting the presence of an object within the code-symbol-capturing subsystem's field of view, the object-detection subsystem comprising an electromagnetic radiation source for emitting electromagnetic radiation toward an object within the code-symbol-capturing subsystem's field of view;
- and
- a calibration processor for adjusting the electromagnetic radiation source's emission power in response to the reception power of the reflected signals of electromagnetic radiation received by the receiving sensor;
- wherein the code-symbol-capturing subsystem is configured to acquire information about code symbols within the code-symbol-capturing subsystem's field of view if the reception power of the reflected signals of electromagnetic radiation emitted by the object-detection subsystem and received by the receiving sensor is substantially equal to a predetermined target reception power.
2 more elements
A method for calibrating the object-detection subsystem of a code symbol reader, comprising:
- providing a system for reading code symbols having (i) a code-symbol-capturing subsystem for acquiring information about code symbols within the code-symbol-capturing subsystem's field of view, the code-symbol-capturing subsystem having a receiving sensor for receiving reflected signals of electromagnetic radiation, and (ii) an object-detection subsystem for detecting the presence of an object within the code-symbol-capturing subsystem's field of view, the object-detection subsystem comprising an electromagnetic radiation source for emitting electromagnetic radiation toward an object within the code-symbol-capturing subsystem's field of view;
- placing an object at a specified distance from the code symbol reader and within the code-symbol-capturing subsystem's field of view;
- emitting electromagnetic radiation from an electromagnetic radiation source toward the object;
- acquiring with the receiving sensor the reflected signals of electromagnetic radiation;
- adjusting the electromagnetic radiation source's emission power until the reflection power of the reflected signals of electromagnetic radiation is substantially equal to a predetermined target reception power;
- and
- configuring the code-symbol-capturing subsystem to acquire information about code symbols within the code-symbol-capturing subsystem's field of view if the reception power of the reflected signals of electromagnetic radiation is substantially equal to the predetermined target reception power.
4 more elements
Dependencies are inferred from the claim text.