Adjustable Object Detection in Code Symbol Readers
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Solution Overview
Problem
Existing code symbol readers have limited configurability in object detection, making it difficult to detect objects at varying distances, which can lead to unsatisfactory scanning performance when objects are positioned at distances not congruent with pre-set short or long-range configurations.
Innovation Solution
A system with an object-detection subsystem that includes an electromagnetic radiation source and a calibration processor, allowing for the adjustment of emission power to detect objects at specific distances by matching the reception power of reflected signals to a predetermined target, enabling customizable detection ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If object detection range is set to fixed short or long range configurations, then the code symbol reader can detect objects at predetermined distances, but it cannot detect objects at varying distances which leads to unsatisfactory scanning performance
Solution Approach 1:
The patent implements adjustable object detection ranges by dynamically configuring the detection threshold parameters in the processor. The system transitions from fixed static detection ranges to multiple configurable dynamic ranges, allowing the detection threshold to be adjusted based on specific application needs. This enables the code symbol reader to adapt to varying object distances while maintaining reliable scanning performance.
Solution Approach 2:
The patent changes the detection threshold parameter of the object detection subsystem to enable different detection ranges. By adjusting this parameter, the system can switch between short-range, long-range, and intermediate detection modes, resolving the contradiction between fixed configuration limitations and the need for versatile detection capabilities across different distances.
2Reliability
If the laser source is continuously on to ensure detection at all distances, then scanning coverage is maximized, but power consumption increases and device lifespan decreases
Solution Approach 1:
The system dynamically activates the laser source only when objects are detected within the configured detection range. By implementing adjustable detection thresholds, the system can optimize the activation conditions of the laser, ensuring it is on only when needed for scanning, thus reducing power consumption while maintaining adequate detection coverage for the specific application scenario.
Solution Approach 2:
The detection threshold parameter is adjusted to control when the laser source should be activated. By changing this parameter, the system optimizes the balance between detection coverage and power consumption, activating the laser only under conditions that meet the configured detection criteria, thereby extending device lifespan while ensuring reliable scanning when objects are present.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise detection of objects at specified distances, improving the usability of code symbol readers by initiating scanning only when objects are positioned correctly, thus optimizing power usage and scanning efficiency.
Implementation Method 1
an electromagnetic radiation source for emitting electromagnetic radiation toward an object within the code-symbol-capturing subsystem's field of view
Data Source
AI summary
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.