Sensor Signal Redundancy for Authenticity Verification
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Solution Overview
Problem
Existing sensor systems face challenges in ensuring the authenticity and integrity of measurement results, particularly due to the susceptibility of analog signals to manipulation during transmission, which can compromise safety in applications like electric vehicles.
Innovation Solution
A sensor device that transmits measurement results as both analog and digital signals, with the digital signal being redundantly transmitted and protected through encryption or authentication codes, allowing for comparison with the analog signal to detect any manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an analog signal is transmitted to achieve fast signal transmission and low implementation cost, then the transmission speed and simplicity are improved, but the signal becomes susceptible to manipulation during transmission, compromising security
Solution Approach 1:
The patent creates a digital copy of the analog sensor signal and transmits both signals simultaneously. The digital copy serves as an authentic reference that can be compared with the analog signal at the receiver to detect any manipulations. This copying approach allows the analog signal to maintain its fast transmission speed while the digital copy ensures authenticity verification.
2Reliability
If a digital signal is transmitted to improve signal security and resistance to manipulation, then the reliability is improved, but the implementation complexity and cost increase
Solution Approach 1:
The patent applies digital signal transmission selectively - not for all signals, but specifically for creating an authenticated copy of analog sensor signals. This partial application of digital technology provides the necessary security enhancement without requiring complete system digitalization, thereby limiting the increase in complexity to only what is necessary for authentication.
3Reliability
If redundant signal transmission in both analog and digital form is implemented to improve security, then the reliability is improved, but the quantity of transmitted data and system complexity increase
Solution Approach 1:
The patent segments the transmission task into two distinct parts: the analog signal carries the primary measurement information for fast response, while the digital signal provides authentication data. This segmentation allows each signal type to fulfill its specific function efficiently, with the digital portion providing just enough redundancy for verification without excessive data transmission.
Data Source
AI summary
A sensor device, having a sensor apparatus configured to measure a measurement parameter in order to obtain a measurement result, a transmission apparatus for transmitting an analog signal indicative of the measurement result and a digital signal indicative of at least part of the same measurement result to an evaluation device, and a protection apparatus for protecting the digital signal prior to transmission.