Tamper-Resistant Relay Module for Mesh Network Hydrant Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Utility companies face high costs and inefficiencies in manually reading utility meters, and existing Advanced Metering Infrastructure (AMI) deployments have limited range and reliability in transmitting meter data wirelessly, especially in remote locations.
Innovation Solution
The implementation of a relay module attached to fire hydrants or other strategic locations within a mesh network, using frequency-hopping spread spectrum technology to extend the range and reliability of wireless communication, allowing for the transmission of meter data back to utility providers through a network of relay modules and collector units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay modules are deployed to extend mesh network range, then communication reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The relay module is designed to perform multiple functions: it acts as both a communication relay device and a mounting structure that interfaces with fire hydrant infrastructure. The module includes a housing that mounts to the fire hydrant, power harvesting circuitry that draws power from the hydrant, and radio communication capabilities, combining these functions into a single integrated device that reduces overall system complexity.
Solution Approach 2:
The relay module is designed to harvest its own power directly from the fire hydrant through embedded power harvesting circuitry, eliminating the need for external power sources or batteries. This self-powered operation reduces installation complexity and maintenance requirements while improving communication reliability in remote locations.
2Area of stationary object
If relay modules are mounted on fire hydrants, then mesh network coverage is extended to remote areas, but installation difficulty increases
Solution Approach 1:
The relay module is designed as a self-contained unit with integrated housing, power harvesting components, and mounting features that can be installed as a single module on fire hydrants. This segmentation allows the system to be deployed in modular fashion, extending coverage area while maintaining relatively simple installation procedures at each location.
Solution Approach 2:
The relay module serves as an intermediary device that bridges the gap between advanced metering devices and collector units in the mesh network. By mounting on existing fire hydrant infrastructure, it uses the hydrant as an intermediary mounting platform, extending network coverage to remote areas without requiring dedicated installation infrastructure.
3Reliability
If tamper-resistant mounting is used to secure relay modules, then system security is improved, but manufacturing complexity increases
Solution Approach 1:
The relay module housing is designed with nested structural elements where the mounting bracket is integrated within the housing structure. The bonnet of the fire hydrant nests over the mounting bracket to provide tamper-resistant securing, while the relay module components are nested within the housing. This nested design provides security without requiring separate complex manufacturing processes for each component.
Data Source
AI summary
A method for attaching a relay module to a fire hydrant comprises positioning the relay module adjacent to the fire hydrant, the fire hydrant comprising a hydrant body and a bonnet coupled to the hydrant body by a plurality of fasteners, the bonnet mounted on top of the hydrant body, the relay module comprising a radio housing defining a top surface, a mast connected to the radio housing and extending upwards from the top surface, and a mounting bracket attached to the top surface, the mounting bracket engageable with the hydrant body; and securing the relay module to the fire hydrant such that the mounting bracket and a portion of the top surface is positioned beneath the bonnet.