Brake Torque Sensor Linkage for Accurate Friction Force Detection
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Solution Overview
Problem
Current braking torque detection devices fail to accurately detect the friction force and torque under abnormal conditions, such as brake lock-up or changes in friction coefficient, leading to false alarms and potential safety hazards.
Innovation Solution
A braking torque sensor system that includes a long circular shaft hole on the brake arm, a connecting plate to detect displacement of the hinge shaft, and a tension sensor to convert plate deformation into electrical signals, allowing for real-time detection of friction force and torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pressure sensor is used to detect braking torque by measuring the working pressure of the brake spring, then the detection device is simple and easy to manufacture, but the detection result does not match the actual friction force under abnormal conditions such as brake lock-up or friction coefficient changes
Solution Approach 1:
The patent replaces the indirect pressure-based detection method with a direct friction force measurement system. By substituting the pressure sensor approach with a mechanical linkage system (connecting plate, long circular shaft hole, and hinge shaft) that directly measures the friction force through displacement, the system achieves accurate detection of actual braking torque while maintaining manufacturing simplicity.
Solution Approach 2:
The patent introduces a connecting plate as an intermediary element between the brake pad and the detection system. This connecting plate translates the friction force into measurable displacement of the hinge shaft within the long circular shaft hole, providing an accurate intermediate measurement that directly reflects the actual braking torque rather than just spring pressure.
2Device complexity
If the detection device speculates braking friction force according to positive pressure, then the detection structure is simple, but it cannot truly detect the magnitude of braking friction force leading to false detection results
Solution Approach 1:
The patent replaces the speculative pressure-based detection with a direct mechanical measurement system. The connecting plate and hinge shaft mechanism directly measure friction force through physical displacement, eliminating speculation and providing reliable detection results that accurately reflect actual braking conditions.
Solution Approach 2:
The detection system utilizes the existing mechanical components of the brake (brake pad, hinge shaft, connecting plate) to perform self-detection of friction force. The brake's own mechanical structure serves the dual purpose of applying braking force and measuring it, eliminating the need for complex external detection equipment while ensuring reliable results.
3Ease of operation
If a pressure sensor detects working pressure of the brake spring, then the detection system is easy to operate, but it sends normal detection results even when the brake arm is locked or friction plate falls off
Solution Approach 1:
The connecting plate acts as an intermediary that directly transmits the mechanical state of the brake pad to the detection system. When the brake arm is locked or friction plate falls off, the connecting plate's position and the hinge shaft's displacement within the long circular shaft hole directly reflect these abnormal conditions, providing accurate detection results while maintaining operational simplicity.
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 real-time detection of friction force and torque, preventing false alarms and allowing for timely identification of brake abnormalities, thus ensuring safety and reducing the risk of accidents.
Implementation Method 1
a tension sensor, fixed on an optimal position of a plate surface of the connecting plate where the plate deformation is generated, and configured to convert the plate deformation generated due to the braking action on the connecting plate into force information
Data Source
AI summary
A braking torque sensor of a brake is provided, the braking torque sensor includes: a long circular shaft hole arranged on a brake arm of the brake; a connecting plate configured to detect a braking displacement which is generated by the hinge shaft of the brake element in a long circular shaft hole and varies with the magnitude of the friction force when the braking action is performed by the brake, and convert the detected displacement into a plate deformation of the connecting plate; and a tension sensor configured to convert the plate deformation generated due to the braking action on the connecting plate into force information, and transmit the force information outwards in a form of electrical signal or digital signal. The detection result of the braking torque sensor is consistent with the actual result, so that an abnormal condition of the brake can be detected in time.