Explosion-Proof Ultrasonic Detector With Metal Enclosure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas leak detection instruments in hazardous environments are not explosion-proof, making them unreliable for detecting gas leaks in situations where explosions can occur, and they often fail to continue detection after exposure to high pressures.
Innovation Solution
An explosion-proof ultrasonic detector is designed with a piezoelectric element encapsulated in a metal enclosure, using a conductive compression element and a sealing material to maintain signal integrity and protect against mechanical and thermal shocks, along with a Faraday cage configuration for electromagnetic interference reduction, allowing for reliable detection of ultrasonic frequencies generated by gas leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing gas leak detection instruments are used in hazardous environments, then they can detect gas leaks, but they are not explosion-proof and fail when exposed to high pressures from explosions
Solution Approach 1:
The piezoelectric element is encapsulated in a metal enclosure that acts as a protective cage structure. This enclosure is designed to withstand and absorb the shock waves from explosions before they can damage the sensitive piezoelectric element, allowing the detector to continue functioning after exposure to explosive conditions.
Solution Approach 2:
The detector combines multiple materials with complementary properties: a metal enclosure for mechanical strength and explosion resistance, piezoelectric material for ultrasonic detection, and conductive compression elements for electrical connection. This composite structure provides both protection and detection functionality.
2Measurement precision
If a piezoelectric element is exposed to mechanical and thermal shocks, then it can detect ultrasonic frequencies, but it suffers from signal degradation and reduced durability
Solution Approach 1:
The metal enclosure serves as a shock-absorbing barrier that protects the piezoelectric element from mechanical and thermal shocks. By cushioning these external forces before they reach the sensitive element, the detector maintains signal integrity and durability in harsh environments.
Solution Approach 2:
The conductive compression element applies controlled mechanical pressure to the piezoelectric element, optimizing its electrical and mechanical coupling. This parameter adjustment enhances the element's sensitivity and durability by ensuring optimal operating conditions.
3Measurement precision
If electromagnetic interference is present in hazardous environments, then detection accuracy is compromised, but adding shielding increases device complexity
Solution Approach 1:
The metal enclosure serves dual functions: it provides mechanical protection against explosions and simultaneously acts as electromagnetic shielding. By combining these two functions into a single structure, the design achieves EMI protection without significantly increasing device complexity.
Solution Approach 2:
The conductive compression element with conductive paste creates an electrically conductive path that provides additional electromagnetic shielding while maintaining mechanical compression. This composite approach integrates EMI protection into the existing mechanical structure.
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 solution enables continuous detection of gas leaks even in explosive conditions, providing reliable and accurate signaling of leak levels, with enhanced durability and resistance to extreme temperatures and pressures, ensuring safety and minimizing product loss.
Implementation Method 1
an ultrasonic detector comprising a piezoelectric element operable to convert the pressure of sound waves from mechanical energy into electric signal
Implementation Method 2
a conductive compression element and a sealing material to maintain signal integrity and protect against mechanical and thermal shocks
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An explosion proof ultrasonic detector (100), comprising: a metal enclosure (2); a sense element (4), attached to the metal enclosure (2); a compression element (5), wherein the compression element (5) is electrically conductive; and a printed circuit board (PCB) (6), wherein the sense element is compressed between the metal enclosure and the PCB using the compression element which electrically connects the sense element with the PCB.