Acoustic Calibration Device for Dynamic Pressure Sensors
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Solution Overview
Problem
Conventional dynamic pressure sensor calibration devices face challenges such as calibration difficulty, ergonomic issues, limited operational feedback, and susceptibility to damage, particularly in high-frequency applications and flush-mount installations, with vendor solutions often lacking in-situ calibration capabilities and broad-band noise signal options.
Innovation Solution
A high-intensity calibration device comprising a power/control box and a portable calibration head with a speaker, designed for ergonomic flexibility and robustness, capable of emitting acoustic calibration signals, including broad-band noise, and accommodating various frequencies and noise levels, suitable for both flush-mount and non-flush-mount installations, with integrated leak detection and feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional calibration devices are used for high-frequency pressure sensors, then calibration can be performed, but the device is susceptible to damage and lacks robustness
Solution Approach 1:
The calibration device incorporates a seal engagement detection mechanism that prevents operation until proper seal engagement is confirmed. This beforehand detection and prevention approach cushions against the harmful effect of operating without proper sealing, which could cause damage to the calibration device or sensor.
2Adaptability or versatility
If vendor calibration solutions are used, then calibration is possible, but in-situ calibration capability is lacking
Solution Approach 1:
The calibration device is segmented into a portable calibration head that can be positioned at the sensor location and a power/control box that can be remotely operated. This segmentation enables in-situ calibration by separating the calibration signal generation from the control functions, allowing calibration to be performed at the installation site without moving the entire system.
Solution Approach 2:
A seal engagement detection mechanism acts as an intermediary between the calibration head and the control system. This intermediary verifies proper seal engagement before allowing calibration operation, ensuring safe and effective in-situ calibration while protecting the system from improper operation.
3Adaptability or versatility
If conventional calibration devices are used, then single frequency calibration is possible, but broad-band noise signal option is limited
Solution Approach 1:
The calibration device incorporates a speaker system that can dynamically generate various signal types including broad-band noise and different frequency tones. This dynamic signal generation capability allows the device to adapt to different calibration requirements without requiring multiple separate calibration devices, thereby increasing versatility without proportionally increasing complexity.
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
The device provides enhanced calibration capabilities, ensuring accurate and safe calibration of dynamic pressure sensors across a range of applications, including high-frequency and flush-mount installations, with improved ergonomics and robustness, and the ability to select various frequencies and noise levels, while preventing damage through leak detection and automatic shutoff.
Implementation Method 1
a speaker provided in the calibration head housing and communicating with the housing opening; wherein the power/control box is configured to induce emission of an acoustic calibration signal from the speaker
Data Source
AI summary
A calibration device for calibrating a dynamic pressure sensor includes a power/control box and a portable calibration head disposed in electrical communication with the power/control box. The portable calibration head may include a calibration head housing having a housing opening and a speaker provided in the calibration head housing and communicating with the housing opening. The power/control box may be configured to induce emission of an acoustic calibration signal from the speaker of the calibration head.