Discrimination Sensor With Transverse Optical Devices
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Solution Overview
Problem
Conventional discrimination sensors face accuracy and reliability issues when detecting deviations in the planar structure of objects, such as bills, due to their narrow sensing width and fixed positioning, leading to incorrect identification of real or fake objects.
Innovation Solution
A discrimination sensor with multiple optical devices disposed at predetermined intervals in a transverse direction to ensure a wide sensing area, equipped with deviation detection, optical device selection, and determination means to assess signals within allowable margins, allowing for accurate discrimination regardless of planar structure deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional discrimination sensor uses a narrow sensing width to detect specific segments, then the device complexity is reduced, but the measurement precision deteriorates due to inability to accommodate deviations in mass-produced objects
Solution Approach 1:
The sensor is divided into multiple independent optical devices (first, second, third optical devices) arranged in the transverse direction. Each optical device can independently detect light from different segments of the planar structure, allowing the system to accommodate deviations by selecting appropriate detection results while maintaining relatively simple individual device structures.
Solution Approach 2:
The patent extends the sensing capability from a single narrow width to a wider transverse direction by arranging multiple optical devices side by side. This dimensional expansion allows the sensor to cover a broader area and accommodate positional deviations without increasing the complexity of each individual optical device.
2Ease of operation
If the discrimination sensor is disposed at a fixed predetermined position, then the ease of operation is improved, but the adaptability deteriorates when characteristic segments have deviations
Solution Approach 1:
The system dynamically selects which optical device's detection result to use based on the actual position of the planar structure. The control unit determines the appropriate detection result from multiple optical devices according to the detected deviation, allowing the fixed sensor to adapt to varying positions without requiring physical repositioning.
Solution Approach 2:
Multiple optical devices are arranged to collectively cover a wider sensing area, making the sensor system universally applicable to objects with various deviation levels. Each optical device serves multiple potential detection purposes, and the system can select the most appropriate one based on actual conditions.
3Device complexity
If the sensing width is extremely narrow to maintain simple device structure, then the manufacturing precision requirements are reduced, but the reliability deteriorates due to erroneous discrimination of real objects as fake
Solution Approach 1:
The sensor is segmented into multiple optical devices that can independently detect different segments. This segmentation allows the system to accommodate deviations by selecting appropriate detection results, preventing erroneous discrimination while maintaining relatively simple individual device structures.
Solution Approach 2:
The control unit uses feedback from the detection results to determine whether the planar structure is real or fake. By selecting appropriate detection results from multiple optical devices based on detected deviations, the system ensures reliable discrimination without requiring complex individual sensor configurations.
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
The solution provides high accuracy and reliability in distinguishing real from fake objects by ensuring a wide sensing area and adaptive signal assessment, effectively mitigating the impact of planar structure deviations.
Implementation Method 1
a plurality of optical devices (for example E1, E2, E3) provided to be capable of receiving a light generated from the planar structure 6 of the specific object 4
Data Source
AI summary
A discrimination machine optically senses an object having a surface with a planar structure while scanning the planar structure along the surface. The machine includes a discrimination sensor including optical devices detecting light generated from the planar structure. The optical devices are disposed at an interval in a transverse direction, perpendicular to a scanning direction, to ensure a sufficiently wide sensing area for the object. A deviation detector detects deviation of the planar structure from a plane based on electrical signals output from the respective optical devices detecting the light generated by the object while the discrimination sensor is scanning the object. An optical device selector selects an optical device, from among the optical devices, based on the deviation detected. A determination is made as to whether the electrical signal output from the optical device selected is within an allowable margin.