Movable Camera on Road Paving Machine for Obstacle Avoidance
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Solution Overview
Problem
Existing road paving machines face the risk of information acquisition devices, such as cameras, hitting obstacles due to being positioned outside the tractor's width range, leading to potential collisions during construction.
Innovation Solution
A road paving machine design that includes a tractor, hopper, conveyor, screw, and screed capable of expanding and contracting, with an information acquisition device and obstacle detection system positioned outside the tractor's width range, allowing for obstacle detection and prevention of collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the information acquisition device is attached to protrude to the left of the tractor to capture blind spot images, then the image capture capability is improved, but the risk of collision with obstacles increases
Solution Approach 1:
The obstacle detection device detects obstacles in advance in the collision course of the information acquisition device before collision occurs. The control device then moves the information acquisition device to a safe position based on the detection result, preventing collision while maintaining the ability to capture blind spot images when safe
2Area of stationary object
If the information acquisition device is positioned outside the tractor width range to expand monitoring coverage, then the surveillance area is improved, but the vulnerability to external obstacles increases
Solution Approach 1:
The information acquisition device is made movable rather than fixed, allowing it to dynamically adjust its position. When obstacles are detected, the control device moves the device to a safe position within the tractor width range, while when no obstacles are present, it maintains its extended position for maximum monitoring coverage
3Measurement precision
If the camera is attached to protrude beyond the hopper wing to monitor the left blind spot, then the blind spot monitoring is improved, but the structural complexity increases
Solution Approach 1:
The movable mounting structure serves multiple functions: it enables the information acquisition device to extend beyond the hopper wing for blind spot monitoring, allows it to retract to a safe position for collision avoidance, and provides a standardized interface for attaching different types of information acquisition devices
Data Source
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AI summary
An object of the present invention is to suppress that an information acquisition device (51) attached out of a range of a width (WC) of a tractor (1) hits an obstacle during construction. An asphalt finisher (100) includes the tractor (1), a hopper (2) that is provided in front of the tractor (1) and that receives a paving material (PV), a conveyor (CV) that feeds the paving material (PV) in the hopper (2) to the rear of the tractor (1), a screw (SC) that spreads the paving material (PV) fed by the conveyor (CV) at the rear of the tractor (1), a screed (3) that levels the paving material (PV) spread by the screw (SC) at a rear of the screw (SC) and that is capable of expanding and contracting in a vehicle width direction, an object detection device (51) that is an information acquisition device (51) which is disposed out of a range of the width (WC) of the tractor (1) and which acquires information of surroundings, and an obstacle detection device (55) that detects an obstacle in a collision course (T1) of the object detection device (51).