Multi-Location Load Control System Dynamic Threshold Adjustment
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Solution Overview
Problem
Existing multiple location lighting control systems suffer from signal interference due to line and load conditions, leading to missed or misinterpreted signals by the smart dimmer, resulting in inadequate control of lighting loads.
Innovation Solution
A multi-location load control system comprising a load control device and at least one accessory control device, where the load control device conducts a load current and receives input signals from the accessory control device to control the power delivered to the electrical load. The system includes a multi-location circuit that senses the input signal, generates a multi-location signal, and adjusts thresholds dynamically based on voltage indications to improve signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multiple location lighting control systems are used, then the system structure is simple, but signal interference occurs due to line and load conditions leading to missed or misinterpreted signals
Solution Approach 1:
The patent implements dynamic threshold adjustment in the multi-location circuit to adapt to varying line and load conditions. The circuit dynamically modifies its signal detection thresholds based on real-time voltage indications, enabling reliable signal interpretation despite changes in electrical conditions across multiple locations.
Solution Approach 2:
The patent changes the electrical parameters (voltage thresholds) of the multi-location circuit based on detected voltage indications. By adjusting these parameters dynamically, the system maintains signal detection accuracy under varying line and load conditions without requiring a completely complex system redesign.
2Measurement precision
If dynamic threshold adjustment is implemented, then signal interpretation accuracy improves, but circuit complexity increases
Solution Approach 1:
The multi-location circuit incorporates feedback mechanisms that monitor voltage indications and automatically adjust thresholds accordingly. This feedback loop enables the circuit to maintain high signal detection accuracy by continuously adapting to changing electrical conditions without requiring complex external control systems.
Solution Approach 2:
The circuit performs self-adjustment of its detection thresholds based on its own voltage indications. This self-service capability allows the circuit to maintain measurement precision autonomously, reducing the need for additional complex control circuitry or external intervention.
3Reliability
If abnormal voltages are discharged, then signal interference is reduced, but energy loss increases
Solution Approach 1:
The multi-location circuit takes preliminary action by detecting abnormal voltage conditions and discharging them before they can cause signal interference. By proactively neutralizing these abnormal voltages, the system prevents signal reliability issues before they occur, rather than reacting after interference has already degraded signal quality.
Data Source
AI summary
A multiple location load control system may comprise a main load control device and an accessory load control device. The main load control device may control an amount of power delivered to an electrical load from an AC power source using a control circuit and a controllably conductive device. The accessory load control device may be coupled to the main load control device via an accessory terminal. The accessory load control device may detect a user input for changing a characteristic of the electrical load and may send a signal to the main load control device indicating the user input. The main load control device may detect a pattern of the signal based on a threshold and further determine the user input in response to the detected pattern. The main load control device may adjust the threshold based on line/load conditions of the multiple location load control system.