Measuring Chain for Signaling Circuit Continuous Testing
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Solution Overview
Problem
Existing measurement chains for electronic signaling circuits require reinitialization to test the current sensor, which disrupts the circuit's operation and is inconvenient for continuous monitoring.
Innovation Solution
A measurement chain design that allows permanent connection of the measuring resistor to the signaling circuit, enabling continuous operation and testing without reinitialization, using a pulse test driver with controllable switches and high-value test resistors to verify the sensor's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switches are used to apply a test signal across the resistor, then the sensor can be tested, but the signaling circuit must be reinitialized and stops operating during the test
Solution Approach 1:
The patent segments the resistance measurement function from the main signaling circuit by introducing a separate test circuit with a test voltage source. This allows the measuring resistor to be tested independently without disrupting the normal operation of the signaling circuit, as the test can be performed through a dedicated path that does not require circuit reinitialization
Solution Approach 2:
The patent introduces a test voltage source and associated switching mechanism as an intermediary system. This intermediary test circuit applies test signals to the measuring resistor through dedicated test switches that can operate independently from the main circuit switches, enabling sensor verification without stopping the signaling circuit
2Ease of operation
If the measuring resistor is permanently connected to the signaling circuit, then continuous monitoring is enabled, but test signals may interfere with normal circuit operation
Solution Approach 1:
The patent employs dynamic switching mechanisms that allow the test circuit to be selectively connected or disconnected from the measuring resistor. The test switches can be closed to apply test signals when needed, and opened to allow normal signaling circuit operation, providing dynamic control over when testing occurs and minimizing interference with continuous monitoring
Solution Approach 2:
The patent implements periodic testing through controlled activation of test switches at specific intervals or conditions. Rather than continuous testing that would interfere with normal operation, the test signals are applied periodically or on-demand through the switching mechanism, allowing continuous monitoring while minimizing disruption to the signaling circuit
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 continuous monitoring and testing of the current sensor without disrupting the signaling circuit, ensuring accurate operation and reducing the need for frequent reinitialization, allowing for real-time assessment of the sensor's performance.
Implementation Method 1
The voltage drop measured across the resistor is proportional to the current being measured (Ohm's law)
Data Source
Figure 1
Figure 2~3
AI summary
The measurement chain for an electronic signaling circuit comprises: - at least one measuring resistor (30, 31) suitable for integration into the signaling circuit, and - at least one acquisition chain (42) comprising voltage measurement means (50) connected to the terminals of the measuring resistor (30, 31). It comprises at least: - one test resistor (40, 41, 70, 71) and at least one associated controllable switch (36, 37, 74) connected to the measuring resistor (30, 31); - the ratio of the value of the test resistor (40, 41, 70, 71) to the value of the measuring resistor (30, 31) is greater than 10; and - the acquisition chain (42) includes means (60) for comparing the voltages measured across the terminals of the measuring resistance (30, 31) in the two states of the switch (36, 37, 74) and means for qualifying (66) the measurement chain according to the result of the comparison.