Brake Control Unit Series Switching for Force Monitoring
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Solution Overview
Problem
Existing braking devices face challenges in preventing excessive braking force that could lead to blocking while ensuring a minimum braking force is available for emergency situations, particularly in vehicles where the rotational angular velocity and braking torque detection methods are not sufficient.
Innovation Solution
A braking device with a series connection of switching devices and monitoring units that adjust the brake control unit's connection to a brake release or closing unit based on actual brake variable thresholds, using physical variables like braking torque or application force to set maximum and minimum brake values, and incorporating an emergency braking function activated by a signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake control unit is directly connected to the brake drive without monitoring units, then the device complexity is reduced, but the reliability deteriorates due to risk of excessive braking force or failure to provide minimum braking force
Solution Approach 1:
The patent implements feedback control by connecting monitoring units to the brake drive and linking them to switching devices in the control circuit. The first monitoring unit detects actual braking force and provides feedback to the first switching device, which opens the circuit when braking force exceeds the maximum permissible value. The second monitoring unit detects when braking force falls below the minimum value and triggers the second switching device to close the circuit for emergency braking. This feedback mechanism ensures reliable brake operation while maintaining relatively simple device architecture.
2Reliability
If monitoring units with switching devices are added to prevent excessive braking force, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the brake control system into distinct functional modules: a first monitoring unit for detecting excessive braking force, a second monitoring unit for detecting insufficient braking force, first and second switching devices for circuit control, and brake release/closing units. Each segment performs a specific function, making the overall system more manageable and reliable despite the increased number of components. The segmentation allows independent optimization of each module while maintaining system-level reliability.
3Object-affected harmful factors
If the first switching device opens to release the brake when maximum braking force is exceeded, then excessive braking force is prevented, but the brake may not provide sufficient braking force in emergency situations
Solution Approach 1:
The patent introduces a second monitoring unit and second switching device as intermediary components between the brake control unit and the brake drive. When the first switching device opens the control circuit to prevent excessive braking force, the second monitoring unit continuously monitors the braking force. If the braking force falls below the minimum required value, the second switching device closes the circuit to trigger emergency braking. This intermediary mechanism ensures that the brake can transition from force limitation mode to emergency braking mode when needed, preventing both excessive and insufficient braking force conditions.
Data Source
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AI summary
The invention relates to a brake device (1), comprising a brake (2) and a brake control unit (10). A brake setpoint value (Fsoll) is supplied to the brake control unit on the input side, and the brake control unit is connected on the output side to a brake drive (6), which is provided with a sensor device for obtaining a brake measurement value (Fist) that depends on the operating state of the brake (2). In order to always ensure in a comparatively simple manner, in the case of such a brake device, that the brake does not produce excessively high braking force (danger of blocking) on the one hand and provides a minimum braking force (for emergency braking) on the other hand, the invention provides that the brake control unit (10) is connected to the brake drive (6) by means of a series connection (19) of a first switch-over apparatus (20) and of a second switch-over apparatus (21), wherein the first switch-over apparatus (20) can be switched over from the connection to the brake control unit (10) to a connection to a brake release unit (22) by a first monitoring unit (15) if the brake measurement value (Fist) exceeds a permissible brake maximum value (Fmax), and the second switch-over apparatus (21) can be switched from the connection to the first switch-over apparatus (20) to a connection to a brake application unit (23) by a second monitoring unit (16) if the brake measurement value (Fist) falls below a brake minimum value (Fmin). The invention further relates to a method for controlling a brake.