Electric Vehicle Motor Auto-Off via Sensing Unit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric scooters lack a mechanism to safely turn off the motor when the user leaves the vehicle, leading to potential loss of control and safety issues.
Innovation Solution
An electric vehicle with a controlling module that includes a sensing unit and microprocessor to detect motor characteristics, determining when the user has left the vehicle and automatically turning off the motor to enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor is kept on to provide electric power and maintain constant speed, then the productivity and performance of the electric vehicle is improved, but the safety deteriorates when the user leaves the vehicle accidentally
Solution Approach 1:
The system performs preliminary detection of motor characteristics (current, voltage, rotational speed) to predict the user's presence or absence before a safety incident occurs. By monitoring these parameters continuously and comparing them against predetermined thresholds, the system proactively identifies when the user has left the vehicle and preemptively turns off the motor to prevent unauthorized operation or accidents.
Solution Approach 2:
The system establishes a closed-loop feedback mechanism where the sensing unit continuously monitors motor characteristics and feeds this information back to the microprocessor. The microprocessor analyzes the feedback signals (current, voltage, rotational speed) and automatically adjusts the motor operation accordingly - maintaining operation when the user is present and shutting down when the user is absent, thus resolving the safety contradiction.
2Reliability
If a sensing unit and microprocessor are added to detect motor characteristics and automatically control the motor, then the safety is improved, but the device complexity increases
Solution Approach 1:
The sensing unit and microprocessor are designed to perform multiple functions: they not only detect motor characteristics for safety control but also monitor operational status, regulate power consumption, and maintain constant speed. By making the controlling module multi-functional, the patent justifies the added complexity through enhanced versatility and integrated control capabilities that benefit overall system performance.
Solution Approach 2:
The controlling module is designed to operate autonomously without requiring constant user intervention. The microprocessor automatically processes sensing unit data, determines user presence based on motor characteristics, and controls motor operation independently. This self-service capability reduces the need for additional user interfaces or manual safety mechanisms, thereby limiting the increase in practical complexity despite the added electronic components.
3Reliability
If the motor characteristics are continuously monitored to detect user presence, then the safety is improved, but the use of energy increases
Solution Approach 1:
The system monitors motor characteristics continuously only when the motor is operating or when safety is critical. The sensing unit and microprocessor can operate at reduced power modes when the motor is off or in idle states. By applying partial monitoring strategically rather than constant full-power monitoring, the system achieves adequate safety detection while minimizing unnecessary energy consumption during various operational states.
Data Source
AI summary
An electric vehicle includes a carrier, at least one wheel assembly, a driving module and a controlling module. The carrier is for carrying an user. The wheel assembly is disposed at the carrier and includes a wheel. The driving module includes a motor disposed at the wheel assembly. The driving module is for switching the motor and includes a sensing unit and a microprocessor. The sensing unit is electronically connected to the motor to detect at least one characteristic of the motor. The microprocessor is electronically connected to the motor. The microprocessor determines whether a predetermined conduction is satisfied according to the characteristic of the motor. When the predetermined conduction is satisfied, the motor is turned off by the microprocessor.