Self-test device for wireless sensor reader accuracy
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Solution Overview
Problem
Existing wireless sensor reader systems face challenges in conducting self-tests for accuracy and functionality, especially in remote locations where environmental constraints prevent separate reference readings, and it is impractical to send technicians for calibration, necessitating a cost-effective and low-effort solution for assessing reader device health.
Innovation Solution
A self-test device and method that allows the reader to communicate with a self-test device emulating the wireless sensor's electrical behavior, enabling the reader to assess its accuracy by comparing received signals against predetermined values, and initiating remedial actions as needed, which can be integrated into a docking station for charging and data linkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If factory testing and calibration are conducted to determine or correct the accuracy of the system, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The reader device performs self-testing by comparing its own readings against predetermined reference values stored in its memory. The system uses its own processor to evaluate accuracy without requiring external testing equipment or technician intervention, thereby maintaining measurement precision while reducing device complexity and testing costs
Solution Approach 2:
Reference values are pre-stored in the reader's memory during manufacturing. This preliminary preparation allows the device to perform accuracy self-assessment in the field without requiring complex external testing equipment, resolving the contradiction between maintaining measurement precision and reducing device complexity
2Measurement precision
If a service technician is sent to the field to check system accuracy, then measurement precision is improved, but loss of time and cost increase
Solution Approach 1:
The reader device autonomously performs accuracy self-assessment by comparing readings against stored reference values. This self-service capability eliminates the need for service technician travel and on-site calibration, dramatically reducing time loss while maintaining measurement precision through automated evaluation
Solution Approach 2:
The system continuously monitors its own performance by comparing readings against reference values and provides feedback on accuracy status. This automated feedback mechanism enables real-time accuracy assessment without requiring external intervention, resolving the time loss associated with technician visits
3Reliability
If self-test is implemented to assess reader device health, then reliability is improved, but device complexity increases
Solution Approach 1:
The reader device uses its existing processor and memory to perform self-testing by comparing readings against predetermined reference values. No additional testing equipment is required, as the device leverages its own computational resources to assess reliability, thereby improving system reliability without increasing device complexity
Solution Approach 2:
The reader's processor and memory serve dual purposes: normal operational functions and self-testing functions. This multi-functionality allows reliability assessment to be integrated into the existing device architecture without adding dedicated testing equipment, resolving the contradiction between improving reliability and maintaining simplicity
4Measurement precision
If self-test is conducted frequently to ensure accuracy, then measurement precision is maintained, but productivity decreases
Solution Approach 1:
The self-test function is activated periodically or on-demand rather than continuously. The reader can perform quick self-assessments at scheduled intervals or when triggered by specific events, maintaining measurement precision through regular checks while minimizing disruption to normal operational productivity
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 the wireless sensor reader system to perform self-tests efficiently, ensuring accuracy and functionality without interrupting its operation, reducing maintenance costs, and allowing for automated or human intervention when necessary, thereby maintaining reliable performance over time.
Implementation Method 1
The self-test device may be configured to emulate at least one electrical behavior of the wireless sensor in a known manner... The self-test device may receive the transmit signal from the reader and evaluate it against predetermined values
Data Source
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AI summary
Disclosed is a self-test device and method for assessing the functional performance of a reader device that is configured to interface with a wireless sensor. The self-test device may be configured to analyze the accuracy of a signal transmitted from the reader device or the accuracy of a signal received by the reader device. In one embodiment, the reader device may be configured to engage the self-test device to allow the reader to transmit a signal, such as a short pulse of energy or a short burst of radio frequency energy to cause the self-test device to output a resonant signal. The self-test device may receive the transmit signal from the reader and evaluate it against predetermined values. The evaluated signals may be used to assess the accuracy of the transmit signal of the reader device to identify potential calibration issues and initiate remedial action by an automated system or human intervention if needed. The self-test device may be built into a docking station where the reader is placed when not in use.