Motor Control System for Folding Partition Obstruction Detection
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Solution Overview
Problem
Conventional motor control systems for automatic doors struggle to smoothly operate while detecting obstructions, leading to unreliable obstruction detection due to fluctuations in current requirements during anomalous operational cycles.
Innovation Solution
A motor control system that dynamically adjusts a current threshold profile based on operational cycles, using a current sensor and processing circuitry to monitor and compare current requirements, generating error signals when exceeding adjusted thresholds, and responding by altering operational modes to maintain detection functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor control system operates in an obstruction response routine to smoothly handle obstructions, then the operation smoothness is improved, but the current profile deviates from the standard profile making obstruction detection unreliable
Solution Approach 1:
The system dynamically switches between a standard current threshold profile for normal operation and an adjusted current threshold profile for obstruction response routines. This dynamic adaptation allows the system to maintain reliable obstruction detection by selecting the appropriate profile based on the current operational state, resolving the contradiction between operation smoothness and detection reliability.
Solution Approach 2:
The system changes the current threshold parameter based on the operational mode. During obstruction response routines, an adjusted current threshold profile is used instead of the standard profile. This parameter change allows the system to accommodate the altered current characteristics during obstruction handling while maintaining reliable obstruction detection capability.
2Measurement precision
If the system uses a standard current threshold profile for obstruction detection, then detection accuracy is improved, but operation smoothness deteriorates when obstructions are present
Solution Approach 1:
The system dynamically selects between standard and adjusted current threshold profiles based on the operational state. When an obstruction is detected and a response routine is initiated, the system switches to the adjusted profile to ensure smooth operation. This dynamic selection maintains detection accuracy during normal operation while enabling smooth obstruction handling when needed.
Solution Approach 2:
The current threshold parameter is changed based on the operational mode. The system uses the standard current threshold profile for accurate obstruction detection during normal operation, and switches to an adjusted profile during obstruction response routines to maintain operation smoothness. This conditional parameter change resolves the contradiction between detection accuracy and operation smoothness.
Data Source
AI summary
A motor control system for a folding partition includes a data storage device and processing circuitry. The data storage device is configured to store a normal threshold profile to serve as a threshold for a measured current supplied to a motor to detect abnormal operation of the motor. The motor is configured to drive motion of the folding partition. The processing circuitry is operably coupled to the data storage device. The processing circuitry is configured to generate an adjusted threshold profile to serve as a threshold for the measured current supplied to the motor while moving the folding partition during a transition from an abnormal operational mode to the normal operational mode. The adjusted threshold profile is used for detecting additional abnormal operation of the motor. The processing circuitry is configured to generate the adjusted threshold profile by adjusting at least a portion of the normal threshold profile.