Thermal Management System for Test-and-Measurement Probes
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Solution Overview
Problem
Test and measurement probes face challenges in accessing small, densely packed, and variably oriented test points on Device-Under-Test (DUT) circuits, especially when operating outside their specified temperature range, leading to inaccurate measurements and potential damage.
Innovation Solution
A thermal management system for test-and-measurement probes that includes a thermally insulated shroud with a heat-transfer fluid system, allowing for precise temperature control of the probe head and cable, using components like vortex tubes and Peltier devices to maintain the probe within its operating temperature range, even in extreme environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a probe is used outside its specified temperature range to access difficult test points, then measurement flexibility and accessibility are improved, but measurement accuracy deteriorates and probe damage risk increases
Solution Approach 1:
The patent introduces a thermal management system as an intermediary between the probe and the extreme temperature environment. This system includes a thermally conductive housing that encapsulates the probe, actively managing thermal transfer to protect the probe while allowing it to operate in challenging thermal conditions, thus maintaining both adaptability and measurement precision
Solution Approach 2:
The patent changes the thermal parameters of the probe system by introducing active heating and cooling mechanisms. By dynamically adjusting the temperature of the probe through Peltier devices or resistive heating elements, the system maintains the probe within its optimal operating temperature range even when exposed to extreme external temperatures, thereby preserving measurement accuracy across a wider adaptability range
2Reliability
If a solder-down probe is used for reliable connection, then connection reliability is improved, but setup time and operational complexity increase
Solution Approach 1:
The patent segments the probe into modular components with standardized connection interfaces. This allows the probe to be quickly connected and disconnected without requiring soldering, while maintaining reliable electrical connections through precision-machined contacts and spring-loaded connectors that ensure consistent signal integrity
Solution Approach 2:
The patent implements self-aligning and self-latching connection mechanisms that automatically ensure proper mating when the probe is connected. The design includes guide pins, tapered interfaces, and snap-fit features that guide the connection process and automatically secure the probe in the correct position, eliminating the need for manual alignment or soldering while ensuring reliable connections
3Ease of operation
If probe wires are made small gauge for accessibility, then ease of operation is improved, but durability and signal fidelity worsen
Solution Approach 1:
The patent applies different wire gauges and material properties to different sections of the probe based on local requirements. The probe tip and connector areas use thick, highly conductive wires for durability and signal fidelity, while intermediate sections use more flexible, smaller gauge wiring for accessibility. This localized optimization allows the probe to maintain high signal quality at critical interfaces while remaining flexible enough for difficult-to-reach test points
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 accurate and reliable measurements across a wide temperature range without damaging the probe, reducing setup time and variability, and extending probe lifespan by maintaining optimal operating conditions.
Implementation Method 1
introducing a heat-transfer fluid to the probe head
Implementation Method 2
a thermally insulated shroud configured to enclose a first portion of a probe head
Implementation Method 3
using components like vortex tubes and Peltier devices to maintain the probe within its operating temperature range
Implementation Method 4
using components like vortex tubes and Peltier devices to maintain the probe within its operating temperature range
Data Source
AI summary
A thermal management system for a test-and-measurement probe that includes a thermally insulated shroud and a fluid inlet conduit. The shroud is configured to enclose a first portion of a probe head of the probe within an interior cavity of the shroud, while permitting a second portion of the probe head to extend out of the shroud. The shroud further includes a fluid outlet passageway configured to permit a heat-transfer fluid to pass from a probe-head end of the interior cavity, through the interior cavity of the shroud, and out of the shroud through an access portion of the shroud. The fluid inlet conduit enters the shroud through the access portion of the shroud, extends through the interior cavity of the shroud, and is configured to introduce the heat-transfer fluid to the probe-head end of the interior cavity.