Trailer Height Control via Wireless Signal Proximity
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Solution Overview
Problem
Existing trailer height adjustment systems are hazardous when operated automatically during loading or unloading, as they can change height without an operator present, potentially leading to unsafe conditions.
Innovation Solution
A trailer vehicle function control system with a wireless electronic control unit that measures signal strength to determine proximity and control functions, ensuring safe operation by disabling control if the signal strength is below a threshold, and using a 802.11 wireless card to manage air suspension pressure for height adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic trailer height adjustment is enabled during loading/unloading, then operational efficiency is improved, but safety is worsened due to potential unintended height changes
Solution Approach 1:
The system continuously monitors proximity sensor data and provides feedback to the control unit. When an operator is detected within the hazardous zone, the system automatically disables height adjustment functions. This feedback mechanism allows automatic operation during loading/unloading while preventing safety hazards through real-time operator presence detection.
Solution Approach 2:
A proximity detection system acts as an intermediary between the operator and the height adjustment system. The sensor detects operator presence and transmits this information to the control unit, which then decides whether to enable or disable height adjustment. This intermediary mechanism resolves the contradiction by allowing automatic operation when safe and preventing it when hazardous.
2Object-affected harmful factors
If manual height adjustment is required for safety, then safety is improved, but operational efficiency deteriorates due to operator presence requirement
Solution Approach 1:
The system dynamically adjusts its operational mode based on real-time conditions. When no operator is detected in the hazardous zone, automatic height adjustment is enabled for efficient operation. When an operator enters the zone, the system automatically switches to manual control mode. This dynamic adaptation resolves the contradiction by optimizing both safety and efficiency based on current operational context.
Solution Approach 2:
The system automatically monitors its own operational context and makes decisions about control mode without requiring continuous operator intervention. The proximity sensors and control unit work autonomously to determine when automatic operation is safe and when manual control is required, enabling the system to serve itself in terms of safety management while maintaining efficiency.
3Ease of operation
If wireless remote control is implemented, then ease of operation is improved, but reliability worsens due to potential signal loss or unauthorized access
Solution Approach 1:
The system preemptively implements security measures including authentication protocols and authorization checks before allowing remote control access. It also pre-establishes safe operating parameters and constraints that cannot be overridden even when connected. This preliminary anti-action against potential unauthorized access or misuse maintains reliability while enabling ease of remote operation.
Solution Approach 2:
The system provides continuous feedback about connection status, authentication state, and operational permissions to both the remote device and the local interface. This feedback mechanism ensures that remote control is only active when properly authenticated and that any loss of connection or authorization is immediately detected and responded to, maintaining reliability while enabling remote operation.
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 safe and remote operation of trailer functions, preventing unintended height changes during loading or unloading by ensuring the control device is within a safe proximity and adjusting air pressure accordingly, enhancing operational safety.
Implementation Method 1
the electronic control unit is adapted in a first step to transmit a signal at a first strength and the electronic device is adapted to measure the signal strength of signals received from the electronic control device
Implementation Method 2
The pressure in the airbags is adjustable depending on loading conditions on the trailer
Data Source
Figure 1
Figure 2
AI summary
A trailer vehicle function control system comprising an electronic control unit provided with a standards compliant communications interface. The communications interface is adapted to communicate wirelessly with a remote electronic device adapted to actuate control of functions on the trailer. In use, the electronic control unit is adapted in a first step to transmit a signal at a first strength and the electronic device is adapted to measure the signal strength of signals received from the electronic control device and to return the measured signal strength. The electronic control unit compares the transmitted signal strength with the signal strength of the signal received from the electronic device and then determines a value for the proximity of the electronic device based on the difference between the transmitted and received signal strengths.