Pressure Display Reference Point Adjustment Mechanism
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Solution Overview
Problem
Existing pressure gauges face challenges in zero point adjustment due to changes in pressure sensors and amplifying circuits over time, making it difficult to accurately read zero pressure without exposing the gauge to the atmosphere, and the zero reset function is often limited in use and not universally applicable.
Innovation Solution
A pressure display apparatus with a reference point adjustment mechanism that allows for zero reset without exposing the gauge to the atmosphere, featuring a reference pressure value setting function, deviation value calculation, and correction function to adjust detected pressure values, enabling flexible and universal adjustment of pressure readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the zero reset function is operated under no pressure (exposure to atmosphere), then the zero point can be adjusted, but the gauge cannot be used in practical applications where exposure to atmosphere is difficult or impossible
Solution Approach 1:
The invention changes the parameter of reference pressure from fixed zero pressure to variable reference pressure that can be set to any magnitude. This allows the zero reset function to be performed at any pressure condition, not just under atmospheric exposure, thereby improving both ease of operation and adaptability to various practical applications.
Solution Approach 2:
The reference point adjustment means is designed to perform multiple functions: it can adjust for zero pressure (traditional zero reset) and also adjust for any reference pressure value. This multi-functionality makes the device universally applicable in various scenarios including those where atmospheric exposure is not possible, eliminating the limitation of the traditional zero reset function.
2Measurement precision
If the zero reset function is used, then the display can read zero under no pressure, but the gauge does not have complete linearity from zero to maximum detection pressure, making it uncertain whether the gauge is correctly adjusted for actual detected pressures
Solution Approach 1:
The invention performs preliminary action by allowing users to set a reference pressure value before actual measurement. By establishing the correct reference point in advance based on known pressure conditions, the system ensures that subsequent measurements are accurately calibrated, improving both zero reading accuracy and overall pressure measurement reliability.
Solution Approach 2:
The system incorporates feedback by comparing the detected pressure value with the set reference pressure value. The correction function uses this feedback to adjust the displayed pressure, ensuring that the gauge reads accurately at the reference pressure point. This feedback mechanism guarantees correct adjustment for actual detected pressures, resolving the linearity uncertainty issue.
3Measurement precision
If a highly sensitive pressure sensor is used to achieve high accuracy (0.03% FS), then pressure zero point adjustment becomes difficult due to fluctuations from slight pressure changes
Solution Approach 1:
The invention introduces dynamics by making the reference pressure value adjustable rather than fixed. Users can dynamically set the reference pressure according to actual operating conditions, allowing the system to adapt to pressure fluctuations. This dynamic adjustment capability makes zero point adjustment easier while maintaining high measurement precision with sensitive sensors.
Data Source
AI summary
A pressure display apparatus that includes a detected signal processor for processing a detected signal Si obtained from a pressure detector for detecting a pressure P, a pressure value display for displaying a detected pressure value Pd at least based on a processed signal Dd obtained from the detected signal processor, and a reference point adjuster for adjusting the display for a given reference pressure value Ps. The reference point adjuster has a reference pressure value setting function to set the reference pressure value Ps for a given magnitude, a deviation value setting capability for obtaining and setting a detected pressure value Pd corresponding to the reference pressure value Ps and the deviation value Ed of the reference pressure value Ps, and a correction capability for correcting at least the detected pressure value Pd regarding the pressure P and displayed on the display based on the deviation Ed.