Personal Mobility Startup Short-Circuit Detection by User Weight
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Solution Overview
Problem
Personal mobility devices face frequent accidents due to short circuits, necessitating a system to prevent electrical shocks by distinguishing between adult and child users and detecting potential short circuits before operation.
Innovation Solution
A personal mobility system incorporating a detection circuit with test voltage sources, switches, sensors, and a controller that measures voltages between battery electrodes and the user's body, assigns user groups based on weight, and provides a warning alarm or signal if voltages exceed reference values, and includes a method for determining short circuits and transmitting warnings to a management server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform short circuit detection threshold is applied to all users, then the detection system is simple to implement, but it cannot flexibly respond to different user types (adults vs. children) leading to inadequate safety protection
Solution Approach 1:
The patent implements dynamic adjustment of detection thresholds based on user weight classification. The controller dynamically selects between a first threshold value for adults and a second threshold value for children, allowing the system to adapt its detection sensitivity to the specific user type rather than using a fixed uniform threshold.
Solution Approach 2:
The patent changes the detection parameter (threshold value) based on user characteristics. By measuring user weight and comparing it against predetermined values, the system changes the voltage threshold parameter used for short circuit detection, using a lower threshold for children and a higher threshold for adults.
2Reliability
If short circuit detection is performed continuously, then user safety is maximized, but energy consumption increases and operational efficiency decreases
Solution Approach 1:
The patent performs short circuit detection before allowing the personal mobility device to operate. The controller executes the detection routine during the startup phase, measuring voltage between the battery and ground before enabling motor operation, thus ensuring safety is established in advance without requiring continuous monitoring during normal operation.
Solution Approach 2:
The patent implements periodic detection at key operational stages rather than continuous monitoring. The detection is performed periodically at startup before operation begins and can be repeated after charging, providing safety checks at critical transition points while allowing the device to operate efficiently between detection cycles.
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 effectively prevents electrical shocks by identifying potential short circuits and providing timely warnings, enhancing user safety and stability by adapting to user types based on weight and authentication.
Implementation Method 1
measure a first voltage applied to a first switch provided between a first test voltage source and a ground through a first sensor and a second voltage applied to a second switch provided between a second test voltage source and a ground
Data Source
AI summary
A personal mobility includes first and second test voltage sources, first and second switches, a ground, a first sensor, a second sensor obtaining weight information of a user, and a controller to: based on startup of the personal mobility, measure a first voltage applied to the first switch provided between the first test voltage source and the ground through the first sensor and a second voltage applied to the second switch provided between the second test voltage source and the ground, assign the user to one of predetermined groups based on the weight information, and based on a case in which at least one of the first or second voltage is greater than or equal to a reference value by comparing the first and second voltages with the reference value previously allocated to a group to which the user is assigned among the plurality of predetermined groups, control alarm device to provide a warning alarm to the user.