Elevator Brake Spring Force Testing via Electromagnetic Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing brake devices in elevator systems require manual testing of friction plate wear, which is inefficient and lacks precision in assessing the performance degradation of elastic members.
Innovation Solution
A brake device with a controller that adjusts electromagnetic force to automatically evaluate the spring force of elastic members by analyzing electrical signals, enabling precise monitoring and notification of maintenance or replacement needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual testing with feeler gauge is used to estimate friction plate wear, then the testing process is simple to implement, but the measurement precision and efficiency are low
Solution Approach 1:
The patent replaces the manual mechanical feeler gauge method with an automated electromechanical testing system. The controller automatically controls the electromagnetic force magnitude to move the moving member between attracting and braking states, eliminating manual intervention and significantly improving measurement precision while maintaining acceptable device complexity through integrated control electronics.
Solution Approach 2:
The brake device performs self-testing by using its own electromagnetic actuator to move the moving member and its own spring to provide the elastic force. The controller automatically monitors the electrical signal to evaluate spring force, enabling the device to test itself without external testing equipment or manual intervention.
2Productivity
If manual testing methods are used for brake device maintenance, then the device structure remains simple, but the productivity and maintenance efficiency are reduced
Solution Approach 1:
The brake device performs automatic self-diagnostics by using its built-in electromagnetic actuator and controller to test the spring force of elastic members. The controller automatically controls the electromagnetic force, moves the moving member between states, and evaluates the spring force based on electrical signals, enabling maintenance personnel to quickly assess component health without manual testing procedures.
Solution Approach 2:
The controller monitors the electrical signal during the testing process and uses this feedback to evaluate the spring force of elastic members. By comparing the electrical signal characteristics when the moving member switches between attracting and braking states, the system automatically determines whether maintenance or replacement is needed, significantly improving maintenance efficiency.
3Measurement precision
If automated electromagnetic testing is implemented, then the measurement precision and productivity are improved, but the device complexity increases
Solution Approach 1:
The controller serves multiple functions: it controls the electromagnetic force magnitude, monitors the moving member position, evaluates spring force based on electrical signals, and determines maintenance needs. By integrating these functions into a single controller, the patent avoids adding separate testing devices and minimizes overall system complexity while achieving high measurement precision.
Solution Approach 2:
The brake device uses its own electromagnetic actuator and control system to perform self-diagnostics. The controller leverages existing components (electromagnetic force generation, moving member mechanism, electrical signaling) to automatically test spring force without requiring external testing equipment, thereby improving precision without proportionally increasing device complexity.
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 accurate, automated testing of brake device components without manual intervention, ensuring reliable and safe elevator operation by timely maintenance of elastic members.
Implementation Method 1
a coil configured to produce an electromagnetic force tending to drive the moving member to move toward the retracted position when energized
Implementation Method 2
an elastic member, disposed between the moving member and the fixed member, for providing a spring force tending to push the moving member toward the braking position
Implementation Method 3
the moving member is in the braking state in which braking force is provided to the braking member through a friction plate correspondingly disposed on the moving member
Data Source
AI summary
A brake device for an elevator system and a testing method thereof. The brake device includes: a fixed member; a moving member movable between a retracted position and a braking position so as to realize switching of the moving member between an attracting state and a braking state, respectively; an elastic member to provide elastic force tending to push the moving member toward the braking position; a coil configured to produce an electromagnetic force tending to drive the moving member to move toward the retracted position when energized; and a controller configured to control a change of a magnitude of the electromagnetic force produced by the coil in a process of testing the spring force of the elastic member, and to acquire corresponding information of the electrical signal for controlling the magnitude of the electromagnetic force when the moving member switches from the attracting state to the braking state.