GNSS-Guided Line Marking Cart for Precise Layout Without Guide Setup
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Solution Overview
Problem
Existing line marking devices are either fully automated and costly, requiring complex setup and programming, or manually pushed and requiring guides like laser beams or chords, which are time-consuming to set up and prone to deviations.
Innovation Solution
A line marking device with a steerable wheel and GNSS receiver, allowing autonomous steering and navigation along predetermined patterns, combined with a marking unit and interface for comparing detected locations to patterns, enabling easy handling and low-cost operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fully automated device with laser beam and reflecting tracking prism is used, then line marking precision is improved, but device complexity and setup time increase
Solution Approach 1:
The patent replaces complex mechanical guidance systems (laser beams, tracking prisms, chords) with electronic GPS/GNSS-based guidance. The marking device uses satellite positioning to determine its location and automatically steers along predetermined paths, eliminating the need for physical mechanical guides and大幅 reducing setup time and device complexity while maintaining marking precision
Solution Approach 2:
The patent introduces GPS/GNSS satellite signals as an intermediary between the operator and the marking device. Instead of direct line-of-sight mechanical guidance, the device receives position information from satellites and uses this data to autonomously navigate, acting as an intelligent mediator that enables precise guidance without complex physical infrastructure
2Ease of operation
If a manually pushed line marking device with laser beam or chord guide is used, then ease of operation is improved, but setup time increases
Solution Approach 1:
The patent replaces time-consuming mechanical guide setup (laser beams, chords) with instant electronic GPS/GNSS positioning. The device begins operation immediately after receiving satellite signals, eliminating the need to physically set up and adjust mechanical guides, thus dramatically reducing setup time while keeping the device easy to operate
Solution Approach 2:
The patent performs preliminary path planning using GPS coordinates before operation begins. The desired marking path is pre-calculated based on satellite position data and stored in the device's memory, allowing the device to start marking immediately without on-site mechanical guide setup, thus saving significant setup time
3Ease of manufacture
If a manually pushed line marking device is used, then device cost is reduced, but marking precision and straightness deteriorate
Solution Approach 1:
The patent replaces expensive mechanical guidance systems with affordable GPS/GNSS electronic guidance. The satellite-based positioning system provides precise location data at a fraction of the cost of laser systems or robotic mechanisms, enabling manual devices to achieve high marking straightness and precision without significant cost increase
Solution Approach 2:
The patent implements continuous feedback through GPS/GNSS positioning, where the device constantly monitors its actual position against the predetermined path and automatically adjusts its course. This closed-loop control ensures high marking precision and straightness by continuously correcting deviations, something difficult to achieve with simple manual devices lacking electronic guidance
Data Source
AI summary
A line marking device (1) comprising a cart (2) with at least one steerable wheel (3) and at least two moving elements (4, 5). The steerable wheel (3) is rotatable around its axle (13) and pivotable such that the cart (2) is steered in a desired direction. The line marking device (1) comprises a GNSS receiver (7) or a robotic total station mounted on the cart (2). The line marking device (1) also comprises at least one spray nozzle (8), for marking a line, which is mounted on the cart and directed towards the ground below the line marking device (1). The device (1) comprises an interface mounted on the cart for a comparator to compare a detected location by the GNSS receiver (7) to a predetermined pattern. The cart (2) may comprise a motor (14) which is adapted to pivot the steerable wheel (3) towards an intended movement.