Foam Test System Using Water Copy for Firefighting Vehicle Accuracy
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Solution Overview
Problem
Current methods for testing the accuracy of firefighting vehicle foam addition systems often result in environmental discharge of fire retardant foams, posing negative environmental effects, and there is a need for a method to test accuracy without actual foam discharge.
Innovation Solution
A system and method that allows the firefighting vehicle's foam addition system to be tested in a controlled mode using a test water stream, where the flow of foam concentrate is restricted, and the flow of test water is permitted through a foam metering device, enabling measurement of the test water stream without actual foam discharge into the environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current methods are used to test the accuracy of foam addition system, then the testing can be performed, but environmental discharge of fire retardant foam occurs causing negative environmental effects
Solution Approach 1:
The patent uses a test water stream as a copy substitute for the actual foam concentrate stream. The test water flows through the foam metering device in place of foam concentrate, allowing measurement and testing of the system's metering accuracy without using any actual foam concentrate. This copying approach enables reliable testing while completely avoiding environmental discharge of fire retardant foam.
Solution Approach 2:
The patent introduces test water as an intermediary substance between the testing objective and the foam metering device. The test water serves as a mediator that can be measured and tracked through the system without having the environmental hazards of actual foam concentrate. The flow control system acts as another intermediary mechanism to manage the switching between test mode and normal operation mode.
2Measurement precision
If foam concentrate flows through the foam metering device during testing, then the actual foam addition can be measured, but environmental discharge occurs
Solution Approach 1:
The test water stream serves as a copy of the foam concentrate stream, allowing the measurement of flow rate and metering precision through the foam metering device without using actual foam concentrate. The flow meter measures the test water flow, providing precise measurement data that reflects how the device would perform with actual foam, while generating no harmful discharge.
Solution Approach 2:
The patent changes the physical parameter of the fluid being measured from foam concentrate to test water. By substituting the chemical composition parameter while maintaining the flow dynamics and metering mechanism, the system achieves measurement precision for foam concentration without the harmful effects of foam discharge. The flow control system enables switching between different fluid parameters.
Data Source
AI summary
Systems and methods for determining the accuracy of a foam addition system on a firefighting vehicle are disclosed. The methods may include measuring the amount of a test water stream flowing through a foam metering device.