Exercise Bike Sensor Detecting Force Balance via Rotation Speed Variation
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Solution Overview
Problem
Conventional exercise bikes lack the ability to detect and provide feedback on the balance of force distribution between the left and right feet during exercise, leading to potential injuries due to uneven exertion and compromised physical coordination.
Innovation Solution
A detection device equipped with a state detector and rotation speed detector on exercise equipment generates signal combinations based on periodic motion, estimating the user's exercising state by analyzing the relative variation in rotation speed and angle, which is communicated via a wireless transmission module to a data collector and monitoring host for visualization in waveform charts, allowing users to adjust their posture for balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional fitness monitors are used to display physical information, then users can obtain present fitness states, but users cannot learn whether the exercise posture is accurate and appropriate
Solution Approach 1:
The system introduces real-time feedback by detecting the user's exercise posture through sensors and providing immediate information about posture accuracy and force balance. The display unit shows whether the exercise posture is appropriate and alerts users when force distribution is unbalanced, enabling continuous adjustment and improvement of exercise technique.
Solution Approach 2:
The patent replaces manual self-assessment of exercise posture with automated sensor-based detection systems. Optical sensors, force sensors, and motion detection devices substitute for human judgment, objectively measuring posture accuracy and force distribution to provide reliable feedback.
2Object-affected harmful factors
If users exercise without posture monitoring, then exercise can be performed freely, but force imbalance between left and right feet causes injury risk and affects physical coordination
Solution Approach 1:
The detection system is segmented into multiple independent sensor units positioned at different locations (pedals, frame, handlebars). Each sensor independently detects specific parameters such as force on individual pedals or body position, and the results are integrated to provide comprehensive posture assessment. This modular approach manages complexity while enabling thorough monitoring.
Solution Approach 2:
The system introduces an intermediary processing unit that receives data from multiple sensors, analyzes force balance and posture accuracy, and translates complex sensor data into simple, actionable feedback for the user. This intermediary layer manages the complexity of multiple sensors while providing straightforward guidance to reduce injury risk.
3Productivity
If force distribution between left and right feet is not monitored, then exercise can continue without interruption, but unbalanced force creates burden and reduces exercise efficiency
Solution Approach 1:
The system merges force detection from both pedals into a unified analysis of force balance. By combining data from left and right pedal sensors, the system evaluates overall force distribution symmetry and provides integrated feedback on bilateral coordination, making it easier to detect and correct imbalances during exercise.
Data Source
AI summary
A detection device and a monitoring system are adapted to detect an exercising state of a user. The detection device is adapted to be equipped on a circulation exercise device of a physical training equipment. The detection device has a state detector and a rotation speed detector. The state detector generates multiple signal combinations based on a periodic motion of the circulation exercise device. The rotation speed detector estimates a relative variation between a rotation speed and degrees of the circulation exercise device based on the signal combinations. The relative variation represents the user's exercising state. According to the relative variation, a user can realize whether the exercising state is in balance.