Portable Snowpack Analysis Apparatus with Segmented Sampling Element
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Solution Overview
Problem
Current methods for evaluating the performance of pneumatic tires on snowpacks are inefficient due to the unpredictability of snowpack mechanical properties and the lack of effective tools for comparing tire performance across similar snow conditions.
Innovation Solution
A portable apparatus and method for analyzing snowpack samples, featuring a sampling element with a coring and analysis portion, load cells for measuring compression and shear strength, and an actuating device for in-situ analysis, allowing for precise evaluation of snowpack layers and their mechanical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If portable and simple apparatus is used for snowpack analysis, then ease of operation and cost-effectiveness are improved, but measurement precision and reliability may deteriorate
Solution Approach 1:
The apparatus is divided into distinct functional modules: a coring element for sample extraction, a compression device with load cell for controlled compression, and a shear testing mechanism. Each module performs a specific function, allowing the system to be portable while maintaining measurement precision through specialized design of each component.
Solution Approach 2:
A load cell is introduced as an intermediary measurement device between the compression mechanism and the snowpack sample. This intermediary component enables precise force measurement in the portable apparatus, resolving the contradiction between simplicity and measurement accuracy by delegating the precision measurement function to a dedicated sensor element.
2Reliability
If extensive sample manipulation is performed during analysis, then comprehensive evaluation is improved, but analysis repeatability and time efficiency deteriorate
Solution Approach 1:
The coring element serves dual functions: it both extracts the snowpack sample from the snowpack and provides the container for subsequent compression and shear testing. By merging the sampling and testing functions into a single integrated element, the apparatus eliminates time-consuming transfer operations while maintaining reliable evaluation of snowpack characteristics.
Solution Approach 2:
The coring element pre-prepares the snowpack sample in the exact configuration needed for testing during the extraction process itself. The sample is cor ed and positioned for compression testing in a single continuous action, eliminating subsequent manipulation steps and improving both repeatability and time efficiency.
3Reliability
If in-situ analysis is performed, then environmental representativeness is improved, but device complexity and measurement control may deteriorate
Solution Approach 1:
The portable apparatus is designed with multi-functional components that perform multiple operations: the coring element extracts samples and serves as the test container, the compression device applies both compression and shear forces, and the load cell measures various force components. This universality reduces overall device complexity while enabling reliable in-situ analysis.
Solution Approach 2:
The apparatus is designed to be self-contained and self-operating in the field environment. The coring element self-extracts the sample, the compression device self-applies controlled forces, and the load cell self-measures the responses. This self-service design minimizes the complexity of external support systems needed for reliable in-situ measurement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and cost-effective measurement of snowpack shear strength, reducing sample manipulation and improving analysis repeatability, enabling comparison of tire performance on snowpacks with similar characteristics.
Implementation Method 1
a load cell (29), housed on the piston (29), for detecting the compression force exerted by the piston (29) on the snowpack sample (C)
Implementation Method 2
the shear strength of the snowpack sample (C) is detected by means of the load cell (29)
Data Source
Figure 1
Figure 2~3
AI summary
A portable apparatus (1) for subjecting a snowpack sample (C) to analysis, having a structure (2) implemented by means of two linear guides (4) and comprising a plate (7) provided with a first through opening (11); a carriage (5) that slides on the linear guides (4) and a sampling element (18) implemented by means of a tubular body (19) having an inner surface (20) which defines a seat for receiving the snowpack sample (C) and that is divided into a coring portion (19*) and an analysis portion (19**); wherein the coring portion (19*) has an outer truncated-cone surface (23) for penetrating the snowpack, isolating and retaining the sample (C); and wherein the portion analysis (19**) has an outer cylindrical surface (22) having a diameter that substantially approximates the diameter of the first through opening (11).