Flame Relay Contact Verification via Dynamic Voltage Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for verifying the operation of a remotely mounted contactor type switch, such as a flame relay, lack a fail-safe mechanism to distinguish between proper closure and false indications caused by component failures like leakage voltage, crosstalk, or faulty drive current, leading to inaccurate detection of the flame relay's status.
Innovation Solution
A system utilizing multiple switches and a controller to measure voltage output across a flame relay, comparing it to predefined voltage ranges to determine the relay's status and detect fault conditions, ensuring accurate operation by differentiating between expected and spurious voltage readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static current measurement system is used to detect flame relay closure, then the system is simple to implement, but it cannot distinguish between proper closure and false indications from component failures
Solution Approach 1:
The patent transitions from static current measurement to dynamic voltage measurement. By applying a test voltage through a switch and measuring the resulting voltage output, the system dynamically tests the relay contact state. This dynamic approach allows differentiation between genuine closure and false indications from leakage voltage or crosstalk, as the voltage response varies based on the actual contact state and circuit conditions.
Solution Approach 2:
The patent changes the measurement parameter from static current to dynamic voltage. By measuring voltage output during a test condition rather than continuous current, the system gains the ability to detect fault conditions. The voltage parameter provides additional information about circuit state that current alone cannot provide, enabling distinction between proper operation and component failures.
2Reliability
If multiple switches and voltage measurements are used to verify contact operation, then the reliability of detection is improved, but the device complexity increases
Solution Approach 1:
The patent makes the existing switch and measurement circuitry multi-functional. The same switch used for normal flame detection is also used for testing the relay contact. The voltage measurement circuit serves both normal operation monitoring and fault detection purposes. This eliminates the need for completely separate test equipment, reducing overall system complexity while maintaining high reliability.
Solution Approach 2:
The system uses its own existing components (switch, voltage source, measurement circuit) to perform self-diagnosis of the relay contact. Rather than requiring external test equipment, the flame scanner system tests itself by applying a test voltage through the switch and measuring the output. This self-testing capability provides reliable verification without adding external complexity.
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
The system provides a reliable method for verifying the operation of a flame relay by accurately distinguishing between proper and faulty states, reducing false positives and ensuring safe operation by using multiple switches and a controller to monitor voltage output against specific ranges.
Implementation Method 1
a voltage source connected to a first terminal of the contact through a first switch; a second switch connected to a second terminal of the contact; a third switch connected to the second terminal of the contact; a voltage output connected to the second switch and the third switch
Data Source
AI summary
A system for verifying operation of a contact includes a voltage source connected to a first terminal of the contact through a first switch; a second switch connected to a second terminal of the contact; a third switch connected to the second terminal of the contact; a voltage output connected to the second switch and the third switch; and a controller to compare the voltage output to a first voltage and a second voltage; wherein the voltage output indicates operation of the contact in response to status of the first switch, the switch and the third switch.