Portable Cathodic Protection Current Interrupter with Multi-Channel Relay Control
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Solution Overview
Problem
Existing portable cathodic protection current interrupters are limited by bulky size, limited relay capacity, and the need for multiple units when multiple current sources need to be interrupted, and they often require bulky batteries for power, which are inconvenient for extended tests.
Innovation Solution
A programmable portable cathodic protection current interrupter with a processor, relay, display, and user interface, along with a rechargeable battery and solar panels, that allows selective current interruption through multiple channels, including a main interruption channel, a testing channel, and an external interruption channel, and includes a GPS for time synchronization and onboard memory for data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple portable interrupters are used to interrupt multiple current sources, then all current sources can be interrupted, but the device quantity and system complexity increase
Solution Approach 1:
The patent combines multiple relay modules (first relay module and second relay module) into a single portable interrupter device, allowing one unit to control multiple current sources. The processor coordinates these relay modules to interrupt cathodic protection current from multiple sources simultaneously, eliminating the need for multiple separate interrupter units.
Solution Approach 2:
The portable interrupter is designed as a universal device capable of interrupting current from different types of cathodic protection sources (impressed current systems and galvanic anodes) using the same basic architecture. The device can function as either a portable interrupter or a permanent installation depending on configuration, providing multi-functional capability.
2Reliability
If a mechanical or solid state relay is used for current interruption, then current can be switched off, but the interrupter becomes bulky
Solution Approach 1:
The patent replaces mechanical relay systems with solid-state relay modules controlled by a processor. This substitution eliminates the need for bulky mechanical components while maintaining reliable current interruption capability. The solid-state relays are integrated into a compact portable housing, significantly reducing device volume.
3Ease of operation
If a rechargeable battery is used for extended testing without AC power, then portability is improved, but the battery becomes bulky
Solution Approach 1:
The patent implements a dynamic power management system where the processor controls the operation of relay modules and other components based on available power. The system can adjust its power consumption characteristics to extend battery life, allowing for extended field testing without requiring excessive battery capacity or weight.
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
Enables efficient and selective current interruption for cathodic protection systems, reducing the need for multiple units and bulky batteries, while allowing for extended testing without the constraints of AC power, improving convenience and accuracy in corrosion mitigation surveys.
Implementation Method 1
A programmable portable cathodic protection current interrupter with a processor, relay, display, and user interface, along with a rechargeable battery and solar panels
Data Source
AI summary
The portable cathodic protection current interrupter is a programmable, portable current interrupter for selectively controlling current interruption to a cathodic protection system. A processor and a voltage regulator are disposed within a portable housing and are in communication with one another. The voltage regulator is adapted for communication with an external power source. A display and a user interface are each mounted on the portable housing. An onboard clock is in communication with the processor for controlling the frequency and duration of current interruption signals. A global navigation satellite system receiver is provided for synchronizing a time signal of the onboard clock. At least one on-board relay is provided for communication with the cathodic protection current source for selectively interrupting current thereto. The portable cathodic protection current interrupter provides selective switching of the relay(s) between a main interruption channel, a testing interruption channel, and an external interruption channel.