Electronically Controlled Marking Apparatus for Underground Facility Verification
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Solution Overview
Problem
Inaccurate marking of underground facilities during excavation can lead to physical damage, property damage, and personal injury, resulting in legal liabilities, as existing marking systems lack reliable methods to verify the correct marking of different types of facilities and record the location and time of marking operations.
Innovation Solution
A marking apparatus and method that includes a housing with a marking dispenser holder, an actuator, user interface, local memory, and processing device to control the dispensing of markers based on user input and verified information, ensuring accurate marking and recording of location and time data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual paint marking tools are used to mark underground facilities, then the marking process is simple and quick, but the accuracy and reliability of marking cannot be verified
Solution Approach 1:
The marking system incorporates a verification mechanism that provides feedback on whether the correct marker was used for each underground facility type. The system tracks which marker is loaded in the dispenser and verifies it matches the required marker for the facility being marked, alerting the operator if there is a mismatch. This feedback loop ensures marking accuracy without significantly increasing system complexity.
Solution Approach 2:
The system introduces an intermediary verification layer between the marker dispenser and the marking action. A processing device acts as an intermediary that receives information about the loaded marker and the facility type, compares them, and controls whether marking should proceed. This intermediary verification mechanism ensures reliability while maintaining operational simplicity.
2Reliability
If multiple paint cans of different colors are used to mark different types of underground facilities, then the correct facility type can be identified, but the worker must repeatedly change paint cans which reduces productivity
Solution Approach 1:
The system employs a single multi-functional marker dispenser that can hold and dispense multiple different marker types. Instead of requiring separate tools for each facility type, the universal dispenser can be loaded with different colored markers as needed, and the system tracks which marker is currently loaded. This eliminates the need for frequent tool changes while maintaining reliable facility type identification.
Solution Approach 2:
The system uses information copying and tracking to maintain awareness of which marker type is loaded in the dispenser. Rather than physically changing markers frequently, the system copies information about the marker identity and tracks it through the marking process, allowing verification without physical reconfiguration. This informational copying approach maintains productivity while ensuring correct marker usage.
3Loss of information
If paint marking is used to indicate underground facility locations, then visual indication is provided, but the marking information cannot be verified after excavation occurs
Solution Approach 1:
The system performs preliminary recording of marking information before excavation occurs. It captures data about which marker was used, where it was applied, and what facility type it represented. This preliminary documentation creates a verifiable record that can be used later to confirm whether proper marking procedures were followed, preventing information loss without requiring complex post-excavation verification systems.
Solution Approach 2:
The system replaces the purely visual mechanical marking system with an electronically supported verification system. Instead of relying solely on physical paint marks that cannot be verified after excavation, the system uses electronic data recording and processing to create a digital record of marking operations. This substitution provides verifiable information while maintaining the simplicity of visual paint marking for actual facility identification.
4Device complexity
If the marking apparatus is designed to hold a single aerosol can in axial orientation, then the structure is simple, but the worker must stand or walk erect which limits maneuverability in confined spaces
Solution Approach 1:
The system transitions from a static, fixed-orientation dispenser holder to a dynamic, adaptable configuration. The dispenser holder can be adjusted or reconfigured to accommodate different working positions and environments. This dynamic design allows the holder to adapt its orientation and positioning based on whether the worker is standing, walking, or working in confined spaces, maintaining structural simplicity while improving operational flexibility.
Solution Approach 2:
The system allows changes in operational parameters such as worker posture and dispenser orientation. Rather than fixing the worker to an erect stance, the system permits parameter changes in body position and tool orientation to suit different working conditions. This includes the ability to crouch, kneel, or work in confined spaces while maintaining proper marker loading and dispensing functionality.
Data Source
AI summary
A marking system may hold a container from which markers are dispensed to mark the presence or absence of an underground facility in a dig area. The container may identify a marker characteristic regarding the markers in the container. The marking system may receive activation of a trigger, dispense a marker from the container when the trigger is activated, and store the marker characteristic and time data when the trigger is activated. In other embodiments, the marking system may dispense a marker, determine location data and/or time data, and substantially simultaneously trigger the dispensing of the marker and logging of the location data and/or the time data. The location data identifies a geographic location where the marker is dispensed and the time data identifies the time when the marker is dispensed.