Control Module Simulating Actuator Load for Line Resistance Monitoring
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Solution Overview
Problem
Existing fire protection systems face challenges in reliably monitoring and adapting to changes in line resistance within signal and supply lines, leading to potential faults and unreliable actuator function, especially in fire protection systems where high reliability and flexibility are critical.
Innovation Solution
A control and monitoring module that includes a control device for activating actuators, a measuring device for determining current and power consumption, and a testing device for simulating load conditions, allowing for precise monitoring of line resistance and detection of faults, ensuring reliable actuator control and fault messaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If actuators are checked through test activations at regular intervals, then the operating status can be secured, but the persons in the range of the fire protection system must be appropriately prepared and the system complexity increases
Solution Approach 1:
The control and monitoring module performs self-testing by automatically simulating actuator current consumption and measuring voltage drops during normal operation without requiring external test activations or personnel intervention. The module monitors its own supply lines and detects faults independently
Solution Approach 2:
The system performs continuous preliminary monitoring of line resistance and voltage drops during normal operation before faults develop. By detecting creeping breaks and resistance changes early, the system identifies potential failures before they compromise actuator functionality
2Measurement precision
If line resistance monitoring is performed with tight tolerance limits (10%), then fault detection precision is improved, but the measurement precision requirements and device complexity increase
Solution Approach 1:
The control and monitoring module continuously measures voltage drops during simulated actuator operation and compares them against threshold values. The system provides feedback about line resistance status and triggers fault messages when voltage drops exceed acceptable limits, enabling precise monitoring without complex external equipment
Solution Approach 2:
The system monitors changes in voltage and current parameters during simulated actuator operation to detect line resistance changes. By observing parameter variations under controlled test conditions, the system achieves precise fault detection using standard measurement capabilities
3Reliability
If the control and monitoring module simulates actuator current consumption to test supply lines, then fault detection capability is improved, but the use of energy and potential false activations increase
Solution Approach 1:
The control and monitoring module performs simulated current consumption tests periodically or at scheduled intervals rather than continuously. This approach maintains fault detection capability while minimizing energy consumption and reducing the risk of false activations by limiting test operations to appropriate moments
Data Source
AI summary
A control and monitoring module is provided for activating an actuator assigned to the control and monitoring module and for monitoring a signal line and/or a power supply line connected to the control and monitoring module and/or to the actuator. The control and monitoring module is configured to detect a fault in the signal line and/or the power supply line, if, during a simulation executed by a testing device, an actual voltage at the control and monitoring module and/or the actuator exceeds a specified upper voltage threshold value or drops below a specified lower voltage threshold value. A system including the control and monitoring module and a method for operating a control and monitoring module are also provided.