Closed-Loop Security Circuit With Multi-Voltage Alarm Outputs
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Solution Overview
Problem
Existing security systems lack a compact, low-voltage, closed-loop design that effectively detects circuit breaks and provides versatile alarm outputs, including both DC and AC voltages, with remote activation and battery backup.
Innovation Solution
A closed-loop security system comprising a power circuit, a detection circuit with two loop circuits and a relay, and an alarm circuit that supplies multiple voltage and signal outputs, including 12 VDC and 120 VAC, with a remote control for activation and deactivation, and a battery-backed trickle charger for continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact, low-voltage, closed-loop design is implemented, then the system size and voltage requirements are reduced, but the detection reliability and alarm versatility are compromised
Solution Approach 1:
The system divides the alarm output into multiple independent circuits: a first alarm circuit for local alarms and a second alarm circuit for remote alarms. This segmentation allows the compact low-voltage design to reliably drive diverse alarm devices by dedicating specific circuits to specific functions, thereby maintaining detection reliability while keeping the overall system compact.
Solution Approach 2:
The patent introduces a transformer as an intermediary device that couples the low-voltage detection circuit to high-voltage alarm outputs. The transformer enables the low-voltage closed-loop circuit to reliably activate high-voltage alarm devices without requiring the entire system to operate at high voltage, thus resolving the contradiction between compact low-voltage design and reliable alarm activation.
2Adaptability or versatility
If multiple alarm outputs with different voltages and signals are provided, then the alarm versatility is improved, but the circuit complexity increases
Solution Approach 1:
The patent designs the alarm circuit with universal functionality by providing multiple alarm outputs that can drive various types of alarm devices (local and remote) through a unified closed-loop detection mechanism. The first and second alarm circuits together form a universal alarm system that can accommodate different voltage requirements and signal types without requiring separate detection circuits for each alarm type.
Solution Approach 2:
Instead of having multiple independent detection circuits for different alarm types, the patent inverts the approach by using a single closed-loop detection circuit that controls multiple alarm outputs. This inversion simplifies the circuit architecture while maintaining alarm versatility, as the detection circuit remains unified while the alarm outputs are diversified.
3Duration of action of stationary object
If continuous operation with battery backup is implemented, then the system availability is improved, but the energy consumption increases
Solution Approach 1:
The patent implements preliminary action by continuously charging the battery through a trickle charger even when AC power is available. This ensures the battery is always ready to take over immediately if AC power fails, thereby maintaining system availability without requiring high energy consumption during normal operation, as the battery charging occurs at a low, continuous rate rather than requiring high-power periodic charging.
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 reliable detection and versatile alarm outputs, ensuring continuous operation and user-configurable deterrents, enhancing security system functionality and user flexibility.
Implementation Method 1
A battery is coupled between the first loop circuit and the second loop circuit of the detection circuit to provide current to the first and second loop circuits
Implementation Method 2
a trickle charger continually charges the battery
Implementation Method 3
a relay, and an alarm circuit with a plurality of alarm outputs... The alarm circuit is coupled to the relay of the detection circuit such that an alarm condition sensed by the alarm sensor causes the relay to supply energy from the power circuit to the plurality of outputs
Data Source
AI summary
A circuit for a security system includes a power circuit, a closed loop detection circuit and an alarm circuit. The detection circuit includes a first loop circuit with an alarm sensor and a second loop circuit with a relay. The alarm circuit provides a plurality of output voltages or signals to at least one alarm device, such as two 120 VAC outputs and two 12 VDC outputs. The alarm circuit is coupled to the relay of the detection circuit, such that an alarm condition sensed by the alarm sensor causes the relay to supply energy from the power circuit to the plurality of outputs to activate at least one alarm device. The security system may be turned on and off by a remote control.