Vehicle Roof Inflatable Body Pressure Control
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Solution Overview
Problem
Existing roof safety systems for vehicles, such as trucks, lack feedback mechanisms to monitor the state of the inflatable body system, leading to uncertain filling processes and increased risk of operating errors and damage.
Innovation Solution
Incorporating a pressure sensor that communicates with a controller to manage the filling and emptying of the inflatable body, along with a switch for manual activation only when the vehicle is stationary, and a display to indicate pressure levels, ensuring safe and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no feedback mechanism is installed in the pneumatic system, then the system structure remains simple, but the filling process cannot be monitored and control precision deteriorates
Solution Approach 1:
A pressure sensor is integrated into the pneumatic system to provide real-time feedback on the filling level of the inflatable body. The sensor communicates with a control unit that automatically regulates the filling process, stopping when the desired pressure is reached. This feedback mechanism eliminates the need for manual monitoring while maintaining system simplicity through automated control.
Solution Approach 2:
The control unit autonomously manages the filling process by receiving pressure data from the sensor and independently controlling the filling valve. The system self-regulates without requiring external intervention, achieving precise filling control while keeping the overall system structure compact and integrated.
2Ease of operation
If manual switch activation is allowed during vehicle movement, then ease of operation is improved, but safety deteriorates due to risk of injury from moving parts
Solution Approach 1:
The switch system dynamically adapts its functionality based on vehicle motion state. When the vehicle is moving, the switch is electronically deactivated or ignored by the control unit. When stationary, the switch becomes active and responsive. This dynamic behavior allows easy operation when safe and prevents activation during movement, eliminating injury risk while preserving user convenience.
Solution Approach 2:
The control unit acts as an intermediary between the manual switch and the pneumatic system. It receives the switch signal but only executes it when vehicle motion sensors confirm the vehicle is stationary. This intermediary layer filters out unsafe activation attempts while preserving the ease of manual operation when conditions are appropriate.
3Ease of operation
If the pneumatic system is activated without brake status verification, then ease of operation is improved, but reliability deteriorates due to potential activation during vehicle movement
Solution Approach 1:
The switch system dynamically adapts its functionality based on vehicle motion state. When the vehicle is moving, the switch is electronically deactivated or ignored by the control unit. When stationary, the switch becomes active and responsive. This dynamic behavior allows easy operation when safe and prevents activation during movement, eliminating injury risk while preserving user convenience.
Solution Approach 2:
The control unit performs a preliminary check of the brake status and vehicle motion state before executing the filling operation. This preliminary verification ensures that the system only activates when safe conditions are met, maintaining reliability while preserving ease of operation through automatic safety verification.
4Measurement precision
If pressure sensor feedback is implemented, then control precision is improved, but device complexity increases due to additional components
Solution Approach 1:
The pressure sensor, control unit, and pneumatic system are merged into an integrated control architecture. The sensor is wired directly to the control unit, which is already managing other vehicle functions. This merging approach adds minimal complexity while achieving precise filling level detection and automated control.
Solution Approach 2:
The control unit autonomously manages the filling process by receiving pressure data from the sensor and independently controlling the filling valve. The system self-regulates without requiring external intervention, achieving precise filling control while keeping the overall system structure compact and integrated.
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 system provides real-time monitoring and control of the inflatable body's pressure, reducing the risk of errors and damage by ensuring accurate filling and emptying processes, enhancing user safety and system reliability.
Implementation Method 1
a pressure sensor (7) is provided which is able to communicate with the controller (6)
Implementation Method 2
The pneumatic system (4) has a first flow path with a first valve (44) for filling the inflatable body (2) and a second flow path for evacuating the inflatable body (2)
Implementation Method 3
via a Venturi nozzle (41) and via the second valve (45) to the filling and evacuation line (3)
Data Source
Figure 1
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Figure 3
AI summary
The vehicle (100) i.e. lorry, has a roof security system with a blowing body (2) i.e. hose, placed between a vehicle bodywork (12) and a tarpaulin (1) for preventing or eliminating accumulations i.e. water. The blowing body is attached to an evacuation pipe connected to a feed device over a pneumatic system arranged on a pressure input side to control filling and/or evacuation of the blowing body. The filling of the body is stopped when a specific pressure value is reached. A pressure output side of the system has a pressure sensor in communication with a controller for detecting pressure.