Portable Electronic Device Passport Control Method
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Solution Overview
Problem
Conventional admission and departure control systems using portable electronic devices, such as IC cards and passports, fail to detect wrongful entries or exits as they simply record new information without referencing existing data, leading to potential oversight of past wrongful activities.
Innovation Solution
A portable electronic device with a storage section, transmitter/receiver section, determination section, writing section, and abnormality warning section that checks if data paired with a write command is stored before writing, and transmits abnormality results to external equipment, ensuring high-reliability control by referencing past entry/exit information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If admission and departure information is simply additionally recorded to the IC without reference to already written information, then the device complexity is reduced and ease of operation is improved, but the reliability of control deteriorates as past wrongful admission or departure cannot be detected
Solution Approach 1:
The determination section performs preliminary verification by checking whether paired data already exists in storage before allowing new admission or departure information to be written. This preliminary action prevents wrongful entries by validating that a matching record (e.g., entry record for departure, departure record for entry) already exists in the storage section, thereby improving control reliability without requiring complex external verification systems
Solution Approach 2:
The system implements feedback by having the determination section continuously monitor and verify newly written information against existing records in storage. When new admission or departure information is received, the system feedbacks by checking whether corresponding paired data exists, and only allows writing if the verification succeeds. This feedback mechanism ensures data integrity and detects potential wrongful activities while maintaining relatively simple device architecture
2Measurement precision
If successive pieces of admission and departure information are stored without verification, then the productivity of data recording is improved, but the measurement precision of data authenticity deteriorates
Solution Approach 1:
The determination section performs preliminary verification by checking whether paired data already exists in storage before allowing new admission or departure information to be written. This preliminary action prevents wrongful entries by validating that a matching record (e.g., entry record for departure, departure record for entry) already exists in the storage section, thereby improving control reliability without requiring complex external verification systems
Solution Approach 2:
The system implements feedback by having the determination section continuously monitor and verify newly written information against existing records in storage. When new admission or departure information is received, the system feedbacks by checking whether corresponding paired data exists, and only allows writing if the verification succeeds. This feedback mechanism ensures data integrity and detects potential wrongful activities while maintaining relatively simple device architecture
Data Source
AI summary
A portable electronic device is provided with a storage section which stores various pieces of information and a transmitter/receiver section which transmits and receives data to and from external equipment. It is determined whether or not data paired with write data contained in a write command is stored by the storage section when the write command is received by the transmitter/receiver section, the write data is written to the storage section if it is concluded that the data paired with the write data contained in the write command is stored by the storage section, and the transmitter/receiver section is caused to transmit a result of determination on abnormality to the external equipment if it is concluded that the data paired with the write data contained in the write command is not stored by the storage section.