Magnetic Ink Reading Device MICR Character Detection
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Solution Overview
Problem
Magnetic ink reading devices in printers often incorrectly detect the absence of a medium due to printed designs or dark portions, leading to incomplete reading of Magnetic Ink Character Recognition (MICR) characters.
Innovation Solution
A magnetic ink reading device with a housing, conveyance path, sensors, and a controller that continuously conveys the medium and reads MICR characters even if the medium detection sensor incorrectly detects the absence, ensuring complete reading by measuring the medium's length and controlling the conveyance and reading processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a medium detection sensor is used to detect the presence or absence of the medium, then the reading operation can be controlled based on medium presence, but the sensor may erroneously detect printed designs or dark portions as absence of medium, causing incomplete reading
Solution Approach 1:
The system performs preliminary action by measuring the length of the medium before the reading operation begins. This length measurement is stored and used later to determine the expected reading duration, allowing the system to continue reading based on pre-established parameters rather than relying solely on real-time sensor detection that may be erroneous.
Solution Approach 2:
The system implements feedback by continuously monitoring the medium detection sensor during the reading operation. When the sensor detects medium absence, the system checks whether the reading has been completed based on the pre-measured length. This feedback mechanism allows the system to distinguish between genuine medium absence and false detections caused by printed designs or dark portions.
2Ease of operation
If the reading operation stops when the medium detection sensor detects absence of medium, then the system responds to detected conditions, but the reading may be interrupted by false detections from printed designs or dark portions
Solution Approach 1:
The system performs preliminary action by measuring the length of the medium before the reading operation begins. This length measurement is stored and used later to determine the expected reading duration, allowing the system to continue reading based on pre-established parameters rather than relying solely on real-time sensor detection that may be erroneous.
Solution Approach 2:
The system implements feedback by continuously monitoring the medium detection sensor during the reading operation. When the sensor detects medium absence, the system checks whether the reading has been completed based on the pre-measured length. This feedback mechanism allows the system to distinguish between genuine medium absence and false detections caused by printed designs or dark portions.
3Extent of automation
If the system relies on medium detection sensor signals to control the reading operation, then the operation can be automated, but false detections cause the reading to stop prematurely
Solution Approach 1:
The system performs preliminary action by measuring the length of the medium before the reading operation begins. This length measurement is stored and used later to determine the expected reading duration, allowing the system to continue reading based on pre-established parameters rather than relying solely on real-time sensor detection that may be erroneous.
Solution Approach 2:
The system implements feedback by continuously monitoring the medium detection sensor during the reading operation. When the sensor detects medium absence, the system checks whether the reading has been completed based on the pre-measured length. This feedback mechanism allows the system to distinguish between genuine medium absence and false detections caused by printed designs or dark portions.
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
Prevents the reading of MICR characters from being stopped halfway, allowing for accurate and complete identification of characters on the medium despite potential detection errors.
Implementation Method 1
the residual magnetic field generated by the magnetized MICR character can be read by a MICR head (also referred to as a magnetic head), and the MICR characters are identified from their magnetic characteristics and magnetic patterns
Data Source
AI summary
A magnetic ink reading device includes a housing having a slot through which a medium is inserted, a roller driven by a motor by which the medium is conveyed along a conveyance path, one or more sensors arranged along the conveyance path and configured to detect the medium at one or more respective positions, a magnetic head configured to read a magnetic pattern formed on the medium with magnetic ink, and a controller. The controller is configured to control the motor to convey the medium inserted through the slot, measure a length in a conveyance direction of the medium using outputs from the sensors, and control the magnetic head to read the magnetic pattern from the medium while controlling the motor to continuously convey the medium for a period corresponding to the measured length.