Dynamic Pressure Sensor Calibration via Free Double Oscillator
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Solution Overview
Problem
There is no standardized method for dynamically calibrating the dynamic behavior of pressure sensors, which is essential for accurate pressure measurements, as existing methods are limited by uncontrolled vibrations and lack of primary calibration techniques.
Innovation Solution
A device and method that utilize a free double oscillator system with a sealed piston and actuator, eliminating the need for a base connection, allowing for precise measurement of piston and housing movements, and enabling primary calibration of pressure sensors, which can then be used for secondary calibration of other sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pressure sensor is dynamically calibrated using existing methods with base connections, then the structural stability is improved, but the vibration control and measurement precision deteriorate due to uncontrolled vibrations
Solution Approach 1:
The invention extracts and eliminates the base connection from the calibration system, creating a baseless calibration device. This removes the source of uncontrolled vibrations while maintaining structural stability through the actuator-piston-housing system alone, enabling precise vibration-free calibration measurements
Solution Approach 2:
The invention replaces the traditional mechanical base connection with an actuator-based mechanical system. The actuator, piston, and housing form a self-contained mechanical system that provides both structural stability and vibration control through controlled mechanical movement without requiring external base support
2Measurement precision
If a standardized primary calibration method is implemented, then the calibration precision is improved, but the device complexity increases due to additional measurement systems and components
Solution Approach 1:
The actuator serves multiple functions: it generates controlled pressure for calibration, provides structural support for the housing, and enables dynamic movement for frequency response testing. This multi-functionality achieves primary calibration precision without requiring separate dedicated components for each function
Solution Approach 2:
The calibration device performs self-calibration through the actuator's controlled movement and the piston-cylinder system's inherent mechanical relationships. The system uses its own components (actuator, piston, housing) to generate known pressure states and measure frequency response, eliminating the need for external calibration standards or additional measurement systems
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 precise dynamic primary calibration of pressure sensors, reducing calibration expenditure and allowing for accurate secondary calibration of other sensors, improving the frequency response and accuracy of pressure measurements.
Implementation Method 1
By way of example, this may in this case be a piezoelectric actuator that mechanically deforms when a voltage is applied
Implementation Method 2
the pressure being generated by way of a piston interacting with a cylinder that is filled with a fluid
Data Source
AI summary
The invention relates to a device and to a method for dynamically calibrating pressure sensors. Pressure acting upon the pressure sensor is compared to a corresponding desired parameter by means of a device according to the pistonphone principle, from which a calibration value c is determined. The aim of the invention is to provide a method and solution which enables a primary calibration of the dynamic ratio of a pressure sensor to be carried out. This is achieved by the fact that the device is only statically determined by respectively a housing to actuator connection and actuator to piston connection, and the piston is sealed in the cylinder with respect to the ambient atmosphere by a seal and is moveably arranged in the seal, and the change in pressure corresponding to the actual valve is calculated.