Visual Signaling for Road Milling Machine Coordination
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Solution Overview
Problem
The existing practice of using horn signals to coordinate the unloading of milled material between self-propelled road milling machines and transport vehicles is inefficient and disruptive, causing irritation to other road users and construction site personnel, and can lead to confusion and safety issues due to noise pollution and the potential for misinterpretation of signals.
Innovation Solution
A signaling device with an operating unit for the road milling machine operator to select and visually display at least two distinct states (stop or continue) to the transport vehicle driver, using optical symbols that are clearly visible and distinct from street signs, reducing noise pollution and ensuring the driver's attention is maintained without relying on horn signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If horn signals are used to communicate stop/continue commands to the transport vehicle driver, then the driver can receive instructions, but other road users and construction site personnel are irritated and confused by the noise
Solution Approach 1:
The patent replaces the acoustic signaling system (horn) with an optical signaling system (visual display unit). The control unit generates optical signals that are transmitted to the transport vehicle driver, eliminating the harmful noise while maintaining effective communication. This substitution transforms the signaling mechanism from acoustic to optical domain, resolving the contradiction between operational effectiveness and noise pollution.
Solution Approach 2:
The patent introduces a visual display unit as an intermediary device between the road milling machine operator and the transport vehicle driver. This intermediary translates control commands into visual signals (such as light patterns or display icons) that can be clearly perceived by the driver without causing disturbance to surrounding personnel and road users.
2Ease of operation
If horn signals are used for coordination, then the transport vehicle driver can be instructed, but the signals can be misinterpreted or missed, leading to safety issues
Solution Approach 1:
The visual display unit utilizes different colors or light patterns to represent different commands (e.g., red for stop, green for continue). This color-coding system provides intuitive and unambiguous signaling that is difficult to misinterpret, enhancing the reliability of communication between the road milling machine and transport vehicle.
Solution Approach 2:
The optical signals may incorporate flashing or pulsing patterns that create visual vibration effects, making the signals more noticeable and difficult to miss. This dynamic visual signaling ensures the driver's attention is captured without relying on acoustic signals that can be overlooked or misinterpreted.
3Productivity
If the conveyor belt operates at high conveying speed to mill large volume quickly, then productivity increases, but the material discharge becomes difficult to manage for the transport vehicle
Solution Approach 1:
The visual display unit provides real-time feedback to the transport vehicle driver about the road milling machine's operational state and material discharge rate. This feedback mechanism enables the driver to adjust the vehicle's position and speed accordingly, facilitating smooth material loading even at high conveying speeds without overwhelming the loading area.
Data Source
AI summary
The machine has an operator platform arranged at a machine frame, a milling device milling a material, and a transport device conveying the milled material to a discharge point. The milled material is taken up at a discharge point by an ahead-driving road milling machine or a following transport vehicle. A control unit provides input of two different operating conditions by a machine operator. An optical indicating unit (11) indicates the two operating conditions by the machine operator for a driver of the ahead-driving road milling machine or transport vehicle.