Pressure Transducer Header Layout for Faster Temperature Sensing
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Solution Overview
Problem
Conventional pressure transducers with integrated temperature measurement suffer from large footprints and poor temperature response due to the placement of the temperature probe, which is either protruding and requiring extra clearance or offset, leading to inaccurate and slow temperature readings.
Innovation Solution
A reduced-size header design with a temperature probe disposed in close thermal proximity to the oil fill cavity, either protruding into or partially surrounded by it, ensuring intimate contact for improved temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the temperature probe is protruding into the pressure media to improve temperature measurement response, then the temperature measurement response is improved, but the transducer diameter becomes significantly larger and requires extra clearance and sealing precautions
Solution Approach 1:
The temperature probe is positioned to extend radially inward from the outer peripheral surface toward the pressure media, utilizing the radial dimension rather than increasing the axial length. This allows the probe to reach the pressure media through the oil fill cavity without increasing the overall transducer diameter, resolving the contradiction between response time and compact size.
2Length of stationary object
If the temperature probe is offset away from the oil fill cavity to reduce transducer diameter, then the transducer footprint is reduced, but the temperature probe has long response time and may be inaccurate due to temperature gradients
Solution Approach 1:
The temperature probe is positioned locally within the oil fill cavity at the front surface of the header, creating a thermal pathway directly adjacent to the pressure media. This localized positioning ensures the probe measures the actual pressure media temperature rather than the transducer body temperature, improving accuracy while maintaining compact dimensions.
3Measurement precision
If a large diameter header is used to accommodate a protruding temperature probe, then the temperature probe can reach the pressure media effectively, but the transducer becomes significantly larger and requires extra sealing precautions
Solution Approach 1:
The temperature probe is nested within the oil fill cavity structure, with the probe extending radially inward from the outer peripheral surface toward the pressure media. This nesting approach allows the probe to reach the pressure media effectively without requiring the overall transducer diameter to be larger, thereby reducing sealing complexity while maintaining measurement accuracy.
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
Enhances temperature measurement accuracy and response time while maintaining a compact footprint by ensuring the temperature probe is in close thermal contact with the pressure media.
Implementation Method 1
a temperature probe disposed in close thermal proximity to or in intimate contact with an oil fill cavity
Data Source
AI summary
A pressure and temperature transducer assembly with an improved temperature response and reduced footprint is provided that includes a header having a front surface and a back surface, an oil fill cavity disposed at the front surface of the header, a pressure chip mounted on the header, a temperature probe opening extending from the back surface towards or within the oil fill cavity of the header, and a temperature probe mounted in the temperature probe opening so that at least the front portion of the temperature probe extends into the oil fill cavity or is in close proximity and at least partially surrounded by the oil fill cavity.