Internally Switched Multiple Range Pressure Transducers
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Solution Overview
Problem
Existing pressure transducers often lack accuracy at the lower end of the pressure range and struggle to accurately measure small differential pressures against high line pressures, necessitating the use of multiple sensing elements optimized for specific pressure ranges.
Innovation Solution
A system comprising multiple pressure sensors, each optimized for a specific pressure range, is selectively switched into operation based on the applied pressure, using a range selector and control module to ensure continuous and accurate output across a wide pressure range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pressure transducer is used to cover a large pressure range, then the device complexity is reduced, but the measurement precision deteriorates at the lower portion of the pressure range
Solution Approach 1:
The pressure measurement range is segmented into multiple sub-ranges, with each transducer optimized for a specific segment. The switching device divides the overall measurement task into portions handled by different transducers based on the current pressure level, allowing each transducer to operate within its optimal accuracy range while collectively covering the full pressure spectrum.
2Measurement precision
If multiple pressure transducers are used to improve measurement precision across different pressure ranges, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Each pressure transducer is designed with multi-functionality to handle specific pressure range segments, and the switching device acts as a universal controller that routes signals appropriately. This allows the system to maintain high measurement precision across the entire pressure range while managing complexity through functional specialization and centralized control logic.
3Measurement precision
If multiple sensing elements are used to measure small differential pressure against high line pressure, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Different sensing elements are assigned to different pressure range segments based on their local optimization characteristics. One or more transducers are specifically designed for low-pressure differential measurement with high sensitivity, while others handle high-line pressure. The switching device activates the appropriate sensing element based on the local pressure conditions, ensuring optimal measurement precision for each local pressure regime.
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
This approach provides high-accuracy pressure measurements across a large range by ensuring that the most suitable sensor is used for each portion of the pressure range, enhancing reliability and consistency of the output.
Implementation Method 1
A plurality of pressure sensors, each responsive to an associated pressure range
Data Source
AI summary
Systems and methods for an internally switched multiple range transducer are provided. In one embodiment, a method comprises receiving, at a first sensor, a pressure, wherein the first sensor is associated with a first pressure range; measuring, at the first sensor, the pressure to generate a first pressure signal; in response to determining that the first pressure signal is not associated with the first pressure range, activating a second sensor, wherein the second sensor is associated with a second pressure range that is different from the first pressure range; and measuring, at the second sensor, the pressure to generate a second pressure signal.