Card Reader Socket Foreign Object Detection via Embedded Optical Sensing
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Solution Overview
Problem
Existing card reader foreign matter detection systems are hindered by weather factors such as rain, snow, frost, and dust, leading to incorrect alarms and ineffective detection.
Innovation Solution
Embedding sensor components within the card reader socket wall to emit and receive detection waves, allowing for the determination of foreign objects regardless of weather interference, using a combination of light emitting diodes and photodiodes with specific emission and reception angles to differentiate between the presence and absence of foreign matter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical sensor is installed on the exterior surface of the card socket to detect foreign matter, then the detection function can prevent foreign matter from being stuck, but the optical sensor window becomes frosted in winter weather causing incorrect alarms
Solution Approach 1:
The optical sensor is embedded within the card reader socket structure, with the emission module and reception module nested inside the socket body. This nesting protects the optical components from direct exposure to weather while maintaining detection capability through the card insertion path.
Solution Approach 2:
The card insertion path serves as an intermediary medium through which detection light travels. Instead of exposing the optical sensor directly to external weather conditions, the system uses the card insertion path as a protected channel for light transmission, allowing detection without direct external exposure.
2Ease of operation
If the optical sensor is exposed on the exterior surface for real-time detection, then foreign matter can be detected effectively, but the sensor is directly exposed to rain, snow, frost, and dust causing detection failures
Solution Approach 1:
Both the emission module and reception module are nested within the card reader socket, protecting them from weather elements. The detection function is maintained by directing light through the card insertion path, which serves as a protected internal channel.
Solution Approach 2:
The system replaces direct external optical sensing with an internal optical path that uses the card insertion mechanism as the detection medium. This substitution allows the detection function to operate through the mechanical card path rather than through exposed external sensors.
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 reliable and automatic detection of foreign objects on card readers, preventing crimes and minimizing losses for users and banks by overcoming weather-related interference, while avoiding false alarms.
Implementation Method 1
whether a foreign object is present in the detection area can be determined from whether the detection wave reflected by the foreign object is received
Data Source
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AI summary
A foreign substance detection device for a card reader includes an emitting module (1), a receiving module (2) and a control processing module (3). The emitting module (1) is embedded on a wall surface of a card reader insertion opening (101) for emitting detection waves to a detection area (103) in front of the card reader insertion opening (101). The receiving module (2) is embedded on the wall surface of the card reader insertion opening (101) for receiving the detection waves emitted by the emitted the emitting module (1). The control processing module (3) identifies whether the receiving module (2) receives the detection wave reflected by the foreign substance in the detection area (103), and determines whether the foreign substance exists in the detection area (103) according to the determination result. A card reader socket which includes a case (100) and the foreign substance detection device is also provided.