Elevating bed and method for detecting braking performance of elevating bed
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Solution Overview
Problem
Elevating beds in medical equipment often have brake devices that deteriorate over time, leading to safety hazards and delayed maintenance, as current methods do not effectively monitor or alert for brake performance degradation until failure occurs.
Innovation Solution
An elevating bed system with a control module that calculates torque values before and after enabling the brake device, using a torque sensor to determine if the brake is normal or abnormal by comparing these values, and outputs an alert signal if the brake is faulty, allowing for proactive maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake device is not monitored continuously, then the equipment structure remains simple, but the brake performance degradation cannot be detected until failure occurs
Solution Approach 1:
The system implements feedback by continuously monitoring torque values from the driving motor and comparing them against reference values. When the torque deviation exceeds a threshold, the system generates an alert signal to indicate brake abnormality, enabling continuous monitoring without requiring complex additional hardware.
Solution Approach 2:
The system uses the existing driving motor's torque data for self-diagnosis of brake performance. By analyzing the torque characteristics already generated during normal operation, the system can detect brake degradation without requiring separate testing equipment or complex monitoring apparatus.
2Loss of time
If brake detection is implemented, then maintenance can be performed timely, but the control system becomes more complex
Solution Approach 1:
The system performs preliminary detection of brake abnormalities by continuously monitoring torque values and comparing them against reference values before actual brake failure occurs. This allows maintenance to be scheduled in advance based on detected degradation trends, reducing maintenance response time.
Solution Approach 2:
The system monitors changes in torque parameters during motor operation to detect brake degradation. By tracking variations in torque magnitude and patterns over time, the system can identify brake performance deterioration without requiring complex diagnostic procedures.
3Measurement precision
If torque monitoring is added to detect brake performance, then brake failure can be predicted, but the device requires additional sensors and increases complexity
Solution Approach 1:
The system utilizes the driving motor's inherent torque sensing capability or existing current measurements to infer brake performance. By analyzing the electrical current or torque data already available from the motor control system, the invention achieves accurate brake monitoring without requiring separate torque sensors or additional measurement equipment.
Solution Approach 2:
The control module serves multiple functions: it controls the driving motor operation, monitors torque values, compares them against reference values, and generates maintenance alerts. This multi-functional approach eliminates the need for separate dedicated monitoring hardware, reducing overall system complexity while maintaining measurement precision.
Data Source
AI summary
An elevating bed capable of detecting braking performance includes an elevating assembly, a driving motor connected to the elevating assembly and driving the elevating assembly to move, a brake device connected to the driving motor, a control module connected to the driving motor and to the brake device. When the control module disables the brake device, the control module controls the driving motor to drive the elevating assembly to move for a first movement distance and calculates a first torque value of the driving motor. When the control module enables the brake device, the control module controls the driving motor to drive the elevating assembly to move for a second movement distance and calculates a second torque value of the driving motor. The control module determines whether the brake device is normal or abnormal according to a relationship between the first torque value and the second torque value.