Elevator Door Pinch Detection with Adjustable Pressure Sensor
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Solution Overview
Problem
Existing elevator door-pinch detection systems face challenges in accurately detecting string-shaped objects due to the non-parallel installation of door hitting faces, leading to incomplete detection and time-consuming reinstallation requirements.
Innovation Solution
A door-pinch detection device with adjustable attachment sections for pressure sensors and repulsive members, allowing for angle adjustments relative to the door panels, ensuring accurate detection of alien objects even when door hitting faces are inclined.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If door hitting faces are installed in an inverted V-shape to reduce door hitting sound, then door hitting sound is reduced, but the pressure sensor and cushioning member cannot contact each other at the lower side, causing detection failure
Solution Approach 1:
The pressure sensor is designed with a movable pressing portion that can move in the door thickness direction. When the door closes and the repulsive member contacts the pressure sensor, the pressing portion moves to maintain contact, allowing reliable detection even when door hitting faces are inclined in an inverted V-shape to reduce door hitting sound
Solution Approach 2:
The pressure sensor is divided into a fixed base portion and a movable pressing portion. The movable pressing portion can independently move to maintain contact with the repulsive member, while the base portion remains fixed to the door panel, enabling the sensor to adapt to non-parallel door configurations
2Object-affected harmful factors
If door hitting faces are installed in an inverted V-shape, then door hitting sound is reduced, but reinstallation is required to adjust door angles, making installation time-consuming
Solution Approach 1:
The pressure sensor incorporates a movable pressing portion that automatically adjusts its position during door closure to maintain contact with the repulsive member, eliminating the need for precise pre-adjustment of door angles and reducing installation time
Solution Approach 2:
The pressure sensor's movable pressing portion self-adjusts its position during operation to maintain optimal contact with the repulsive member, eliminating the need for manual adjustment of door angles during installation and maintenance
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 adjustable device enhances the accuracy of detecting alien objects, reducing installation complexities and ensuring reliable detection without the need for door realignment.
Implementation Method 1
the pressure sensor detects a pressure resulting from an elongated object or a string-shaped object, which intersects the door hitting face, being pressed via the cushioning member to detect an alien object
Implementation Method 2
a repulsive member installed in a manner for the pressure sensor to be housed therein
Data Source
AI summary
An object of the present application is to obtain a door-pinch detection device and an elevator door device that enable detection of a string-shaped object. Accordingly, the elevator door device of the present application includes: a door panel of an elevator; and a first attachment section and a second attachment section installed on at least either one of a front face or a back face of the door panel, the first attachment section including a pressure sensor, the second attachment section including a repulsive member installed in a manner for the pressure sensor to be housed therein when doors of the elevator are closed, thus enabling adjustment of an angle of the pressure sensor relative to the door panel. Therefore, door-pinch of an alien object can be detected with an improved accuracy.