Load Cell Assembly for Water Rocket Thrust Measurement
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Solution Overview
Problem
Measuring and recording data from the launch of water rockets is challenging due to their chaotic and fast-paced nature, and the expulsion of water during launch makes indoor testing difficult, leading to inaccurate data collection.
Innovation Solution
An apparatus comprising a housing, load cell assembly, launcher assembly, rocket assembly, and base piston, which allows for the accurate recording of thrust data by maintaining contact with the load cell throughout the thrust phase and preventing interference from the launcher assembly during water and air expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If field testing is used to measure water rocket thrust, then the rocket can be tested outdoors, but the data collection becomes difficult and inaccurate due to chaotic flight paths and water expulsion
Solution Approach 1:
A load cell assembly is introduced as an intermediary measurement device between the rocket and the testing system. The load cell directly measures thrust force through a controlled interface, serving as a mediator that converts the complex flight dynamics into measurable force data, thereby improving measurement precision while reducing detection difficulty
Solution Approach 2:
The patent replaces complex mechanical field testing with a controlled indoor testing system that uses a load cell to measure thrust. This substitution of the measurement approach allows for more accurate and easier data collection by replacing indirect field measurements with direct force sensing in a controlled environment
2Measurement precision
If indoor testing is attempted to improve data collection, then measurement accuracy may improve, but water expulsion interferes with the testing process
Solution Approach 1:
The launcher assembly is extracted from the direct path of water expulsion by using a base piston to move it out of the way during the thrust phase. This separation removes the harmful interference of water expulsion from the measurement process, allowing indoor testing to proceed accurately without the water spray interfering with sensors or measurement systems
3Device complexity
If the launcher assembly remains in place during water expulsion, then structure is simplified, but it impedes water exit and causes inaccurate data
Solution Approach 1:
The launcher assembly is designed to be dynamic rather than static - it moves out of the way during the thrust phase via the base piston mechanism. This dynamic repositioning allows the launcher to remain structurally simple while preventing it from interfering with water expulsion, thereby maintaining measurement precision without adding complex permanent structures
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 precise and accurate data recording of water rocket thrust during indoor testing, overcoming the limitations of field testing and chaotic flight paths.
Implementation Method 1
The load cell is adapted to capture and record the thrust of the water rocket
Implementation Method 2
The base piston is adapted to move the launcher assembly out of the way of the releasing water and air
Implementation Method 3
The supply of air and/or water pressurizes the rocket assembly and the launcher assembly, which may then be released to cause the rocket to exert a force in a direction opposite to the direction of the release of water and air
Implementation Method 4
The housing is adapted to retain the released water within the housing
Data Source
AI summary
Disclosed is A load cell assembly for transferring a load to a transducer, the load cell assembly comprising a contact plate adapted to contact an object generating the load; a transducer adapted to generate an electrical signal proportionate to the load; and a ball component adapted to transfer the load from the contact plate to the transducer; wherein the contact plate, ball component, and transducer are arranged so that the contact plate and transducer are simultaneously in contact with the ball component.