Closure Element Motion Sensing Without Fixed Test Attachments
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Solution Overview
Problem
Existing methods for detecting the closing and opening movement of closure elements, such as motor vehicle doors, lack reproducibility and require fixed attachments, which introduce errors and limitations in measuring essential parameters like closing force and velocity.
Innovation Solution
A handling device, preferably an articulated robot, forces the closure element into movement using sensors to detect interactive forces and position changes, allowing for reproducible measurement of movement sequences without a fixed connection, using a first sensor for force detection and a second noncontact sensor like a laser line sensor for position and angle measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors with brackets are attached directly to the motor vehicle to detect door velocity, then door velocity can be detected, but the measurement precision is reduced due to the requirement for brackets and fixed attachments
Solution Approach 1:
The patent replaces mechanical bracket attachments with a magnetic field-based sensing system. The magnetic sensor detects door velocity through the magnetic field generated by a magnet attached to the door, eliminating the need for mechanical brackets and direct physical contact with the door structure.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the sensor and the door. The magnet attached to the door creates a magnetic field that the magnetic sensor detects, allowing velocity measurement without direct mechanical contact or complex bracket structures.
2Reliability
If suction cups are used to attach fastening elements to the door for testing, then the door can be tested during movement, but the reliability is reduced due to the fixed connection requirement
Solution Approach 1:
The patent replaces mechanical suction cup attachments with a magnetic field-based sensing system. The magnetic sensor detects door movement parameters through the magnetic field without requiring physical attachment to the door, eliminating the reliability issues associated with suction cups and their fixed connection requirements.
Solution Approach 2:
The patent extracts the sensing function from the mechanical attachment system. Instead of requiring physical contact through suction cups, the magnetic sensor extracts velocity and position information from the magnetic field generated by the magnet on the door, eliminating the need for mechanical fastening elements.
3Manufacturing precision
If the door movement is executed manually for testing, then simple testing can be performed, but the manufacturing precision is reduced due to lack of reproducibility
Solution Approach 1:
The patent implements a feedback system where the magnetic sensor continuously monitors door velocity and position, and this information is fed back to the control unit. The control unit processes the sensor signals and provides feedback control to achieve reproducible closing movements with precise velocity and position control, eliminating the variability of manual execution.
Solution Approach 2:
The system uses the door's own magnetic field (generated by the attached magnet) as the measurement source. The magnetic sensor detects the magnetic field changes caused by door movement, allowing the door to serve its own measurement needs without requiring external test equipment or complex test setups.
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
Enables precise, contact-free detection of the entire movement sequence and essential parameters like closing force and speed, reducing errors and allowing for defined energy and speed settings, ensuring accurate and reproducible results without damaging the closure element.
Implementation Method 1
a magnetic sensor, in particular a noncontact magnetic field sensor, for detecting position changes of the closure element
Data Source
AI summary
A method for detecting at least one characteristic parameter of a closure element (12) closing an opening. By means of a handling device (10), a movement is imposed on the closure element (12), wherein at least the interacting force between the closure element and the handing device during the movement is determined by means of a first sensor (20) integrated in the handling device, and position changes of the closure element during the movement sequence are detected by means of a second sensor (26).