Force Sensor Measured Body for Direct Exercise Work Measurement
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Solution Overview
Problem
Traditional exercise equipment systems fail to directly measure the work done by users, relying on indirect methods such as weight stacks or resistance data, which lack reference value due to incomplete energy transfer.
Innovation Solution
A force measuring system comprising a measured body with force sensors, a Wheatstone bridge, circuit board, data transmission module, and power module that generates a direct measurement signal reflecting the user's applied force through deformation, allowing for accurate transmission of force information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional indirect measurement methods (weight stacks or resistance data) are used, then the device complexity is reduced, but the measurement precision deteriorates because the data does not directly reflect the user's actual work
Solution Approach 1:
The patent replaces indirect mechanical measurement methods (weight stacks, resistance systems) with a direct electronic measurement system using force sensors and Wheatstone bridges. This substitution enables direct measurement of user-applied force, significantly improving measurement precision while accepting increased device complexity through integration of electronic components.
2Reliability
If direct force measurement is implemented using force sensors and Wheatstone bridge, then the measurement precision improves to directly reflect user work, but the device complexity increases due to additional components
Solution Approach 1:
The patent introduces a measured body as an intermediary element that directly receives user-applied force and transmits it to force sensors. This intermediary structure enables reliable direct measurement of user work while organizing the complex measurement system into a coherent architecture, improving reliability despite increased component count.
3Loss of information
If indirect conversion from resistance data is used, then the ease of operation is maintained, but the loss of information increases because damping energy is not fully accounted for
Solution Approach 1:
The patent extracts the force measurement function from the indirect resistance-based system and implements it as a dedicated direct measurement subsystem. By separating the force sensing function into distinct force sensors and measurement circuits, the system captures complete force information without loss, while maintaining ease of operation through automated digital signal processing.
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 a reliable and valuable measurement of user work, directly reflecting the applied force, enhancing the reference value compared to traditional methods.
Implementation Method 1
at least one force sensor disposed on the measured body, a resistance value of which changing according to a deformation amount of the measured body
Implementation Method 2
a Wheatstone bridge disposed on the circuit board, the Wheatstone bridge being electrically connected to the at least one force sensor and generating an output voltage as a measurement signal
Data Source
AI summary
A force measuring system for exercise equipment provided for using in an exercise equipment, the system includes a measured body, a force sensor, a circuit board; a Wheatstone bridge, a data transmission module and a power module disposed on the circuit board; and a receiving device. The power module provides a working power supply. The measured body is connected to the exercise equipment. The force sensor is disposed on the measured body, and the resistance value thereof changes along with a deformation amount of the measured body. The Wheatstone bridge is electrically connected to the force sensor to output a measurement signal. The data transmission module transmits a force taken information to the receiving device, wherein the force taken information is obtained according to the measurement signal.