Vented Wireless Sensor Housing for Faster Temperature Response
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Solution Overview
Problem
Conventional wireless temperature and humidity sensors in data centers and server rooms have suboptimal sensor element exposure to the ambient environment, leading to slow response times and reduced sensitivity due to 'dead air' spaces and inefficient mounting features, which also impact antenna efficiency.
Innovation Solution
A wireless sensor assembly with a small form-factor housing that minimizes dead-air space around the sensor element, features a vented sub-chamber for improved air flow, and includes a mounting system with a flat surface and channels for secure attachment, optimizing sensor exposure and mounting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor housings are used, then the sensor element is protected from physical damage, but dead air spaces are created that reduce sensor sensitivity and slow response time
Solution Approach 1:
The patent employs a thin membrane or diaphragm as the housing material directly surrounding the sensor element. This thin-film structure minimizes the distance between the sensor and ambient air while still providing protective enclosure, thereby eliminating dead air spaces that would otherwise insulate the sensor and reduce its sensitivity to environmental changes.
Solution Approach 2:
The housing design implements different structural qualities at different locations: the region immediately surrounding the sensor element uses a thin, minimally obstructive structure to maximize air exposure and sensitivity, while other portions of the housing provide adequate protection. This localized differentiation resolves the contradiction between protection and sensitivity.
2Ease of operation
If conventional mounting features like slots or loops are used, then the sensor can be attached to surfaces, but the housing size increases and mounting efficiency decreases
Solution Approach 1:
The patent integrates the mounting feature directly into the housing structure as an inherent element rather than adding it as a separate component. This merging of mounting functionality into the existing housing design eliminates the need for additional slots, loops, or attachment mechanisms, thereby reducing overall housing size while maintaining ease of installation.
Solution Approach 2:
The housing structure is designed to serve multiple functions simultaneously: it provides environmental protection for the sensor, defines the sensor exposure geometry, and incorporates mounting capability. This multi-functionality reduces the need for separate dedicated mounting features, simplifying the overall design and reducing housing dimensions.
3Ease of manufacture
If multiple threaded fasteners and snap-fit features are used, then the housing can be assembled, but the assembly process becomes difficult and time-consuming
Solution Approach 1:
The patent removes unnecessary fastening features from the housing design, retaining only the essential single fastener needed to secure the housing halves. By extracting redundant threaded fasteners and snap-fit features, the design simplifies the assembly process while maintaining adequate structural integrity.
Solution Approach 2:
The housing is divided into two main sections that can be easily joined with a single fastener, creating a simple segmented structure. This segmentation approach, combined with minimal fastening, allows for easy assembly and disassembly without requiring multiple complex fastening mechanisms.
4Reliability
If the antenna is positioned parallel to the ground plane, then the housing structure is simplified, but antenna efficiency and signal power are reduced
Solution Approach 1:
The patent repositions the antenna from a configuration parallel to the ground plane to one that extends perpendicular to it, utilizing the third dimension (height/depth) rather than only the planar dimensions. This dimensional change allows the antenna to achieve better radiation patterns and efficiency while maintaining a compact housing structure through optimized spatial arrangement.
Data Source
AI summary
A wireless sensor assembly for monitoring conditions in an ambient environment, such as for use in a climate control system for a data center is disclosed. The sensor assembly has a small form-factor housing extending along a longitudinal axis and defining an interior space. A sensor circuit is disposed within the housing and includes at least one sensor element for detecting temperature and/or humidity that is enclosed within a vented sub-chamber of the housing. A mounting member forming part of an exterior surface of the housing mounts the sensor assembly vertically along the at an installation location within an ambient environment being monitored.