Ultrasonic Sensor Device Bubble Venting
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Solution Overview
Problem
Existing sensor devices for detecting liquid media properties in pipeline systems are complex, costly, and prone to errors due to air or gas bubbles, which disrupt ultrasonic signal propagation and reduce measurement accuracy.
Innovation Solution
A compact sensor device with a simple structure, featuring a measuring space enclosed by connection elements with reflection surfaces, allowing ultrasonic signals to propagate through the liquid medium with minimal interference from bubbles, ensuring accurate and reliable detection by positioning openings above the reflection surfaces and promoting a venting effect to remove gas bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultrasonic transducers are arranged at both ends of the measuring space with complex calibration paths, then measurement accuracy is improved, but device complexity and calibration cost increase
Solution Approach 1:
The patent extracts and eliminates the complex calibration reference path from the measurement system. By using a single ultrasonic transducer and measuring the round-trip time of sound waves through the gas sample chamber, the system achieves accurate gas concentration measurement without requiring separate calibration paths or multiple transducers, thus simplifying the device while maintaining measurement precision
Solution Approach 2:
The single ultrasonic transducer serves multiple functions: it acts as both the sound source and the receiver, performs both transmission and detection, and eliminates the need for separate calibration mechanisms. This multi-functional design reduces device complexity while maintaining measurement accuracy through the time-of-flight measurement principle
2Volume of moving object
If the measuring space is made compact to reduce dimensions, then device size is reduced, but bubble interference and measurement reliability deteriorate
Solution Approach 1:
The system employs periodic ultrasonic signal transmission through the gas sample chamber. By sending ultrasonic pulses at regular intervals and measuring the time of flight for each pulse, the system can detect and account for bubble interference patterns, maintaining reliable measurements in a compact measuring space where bubbles are more likely to form
Solution Approach 2:
The measurement system incorporates feedback mechanisms that continuously monitor the ultrasonic signal characteristics. When bubble interference is detected through changes in signal transmission time or intensity, the system can adjust measurement parameters or trigger alerts, ensuring reliable operation despite the compact measuring space that is more susceptible to bubble formation
3Difficulty of detecting and measuring
If multiple reflection surfaces are arranged at angles to guide ultrasonic signals, then signal path control is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of using complex angled reflection surfaces to guide ultrasonic signals, the patent inverts the approach by using a single transducer that emits signals directly through the gas sample chamber and receives the reflected signals. The measurement is based on the time of flight of the sound waves traveling through the gas, eliminating the need for manufactured reflection surfaces while maintaining precise signal path control
Solution Approach 2:
The patent replaces the mechanical system of angled reflection surfaces and multi-transducer arrangements with an acoustic field-based measurement approach. By measuring the time of flight of ultrasonic waves traveling directly through the gas sample, the system achieves accurate gas concentration measurement without requiring complex mechanical housing features for signal guidance
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 reliable and accurate detection of liquid medium properties with reduced susceptibility to bubble interference, enabling continuous monitoring and cost-effective production for applications like exhaust gas cleaning systems.
Implementation Method 1
an ultrasonic module, which transmits ultrasonic signals into the measuring space and receives reflected ultrasonic signals from the measuring space
Implementation Method 2
the connection elements having respective reflection surfaces for predetermined reflection of the ultrasonic signals in the measuring space
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a sensor device for detecting the properties of a fluid medium (3) by means of ultrasonic signals, comprising a first connection element (11) and a second connection element (12) spaced apart therefrom, and a measuring chamber (14) arranged between the connection elements, which is closed by means of the connection elements (11, 12) and is filled with and flows through the fluid medium (3), and an ultrasonic module (15) which sends ultrasonic signals into the measuring chamber (14) and receives reflected ultrasonic signals from the measuring chamber (14), wherein the connection elements (11, 12) have respective reflective surfaces (21, 22) for the predetermined reflection of the ultrasonic signals in the measuring chamber (14), and the connection elements (11, 12) have respective openings (23, 25) for the fluid medium (3) to flow into and out of the measuring chamber (14), and the openings (23, 25) are located above the reflective surfaces (21, 22). 22) are trained.