Relay Failure Diagnosis Circuit Segmentation and Periodic Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing relay failure diagnosis circuits fail to accurately diagnose failures in diagnostic signal transmission and reception circuits, leading to incorrect diagnosis of relay failures.
Innovation Solution
A relay failure diagnosis circuit comprising a first and second terminal, first and second relay, diagnostic signal transmission and reception circuits, and a controller that diagnoses failures by transmitting and receiving diagnostic signals across the relays, allowing for the determination of normal or faulty operation of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple diagnostic signal transmission circuit is used, then the device complexity is reduced, but the measurement precision of relay failure diagnosis deteriorates
Solution Approach 1:
The diagnostic circuit is segmented into multiple independent diagnostic signal transmission circuits, with each circuit dedicated to diagnosing specific relays. Each transmission circuit includes its own diagnostic signal generator and detector, allowing isolated testing of individual relays without interference from other circuits. This segmentation enables accurate failure diagnosis while maintaining manageable circuit complexity through modular design.
2Productivity
If diagnostic signals are transmitted during relay operation, then the productivity of power supply is maintained, but harmful factors increase due to signal interference
Solution Approach 1:
The diagnostic signal generator transmits diagnostic signals periodically rather than continuously, and the detector samples signals at specific intervals. This periodic operation allows relay diagnostics to be performed during operational cycles without requiring continuous interruption of power supply. The timed transmission and detection windows minimize signal interference by ensuring diagnostics occur during designated periods when relay states are stable and measurable.
3Ease of operation
If the detector detects both relay state and diagnostic signal simultaneously, then the ease of operation is improved, but the measurement precision deteriorates due to signal confusion
Solution Approach 1:
The detector uses an intermediary switching mechanism controlled by the controller to selectively connect to different signal sources. When diagnosing relays, the switch routes the detector to receive diagnostic signals from the diagnostic signal generator. When performing other functions, the switch routes to receive relay state signals. This intermediary switching allows the single detector to perform multiple functions with high precision by ensuring it receives only the intended signal type at any given moment, avoiding signal confusion.
Data Source
AI summary
The present disclosure describes a failure diagnosis circuit may comprise a first terminal, a second terminal, a first relay and a second relay, a diagnostic signal transmission circuit, a transmission circuit diagnosis circuit, a first diagnostic signal reception circuit, a first reception circuit diagnosis circuit, a second diagnostic signal reception circuit, a second reception circuit diagnosis circuit, and a controller.