Air Tightness Detection with Protected Low-Pressure Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current air tightness detection methods require separate low and high air pressure sensors, leading to increased costs and inconvenience due to the need for two distinct instruments, as low pressure sensors are damaged by high pressures beyond their resistance limit.
Innovation Solution
An apparatus that embeds a low air pressure sensor within an air tightness detector capable of withstanding high pressures, using a pressure regulating component and bypass isolating valves to protect the sensor, allowing for leakage tests under different inflation pressures with a single instrument.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a low air pressure sensor is used for air tightness detection under low air pressure, then measurement precision is improved, but the sensor is damaged when exposed to high air pressure
Solution Approach 1:
The system divides the detection function into two independent sensor channels: a low air pressure sensor for low pressure detection and a high air pressure sensor for high pressure detection. Each sensor operates independently within its safe pressure range, avoiding damage while maintaining measurement precision for respective pressure levels
Solution Approach 2:
Multiple isolating valves (first bypass isolating valve, second bypass isolating valve, third bypass isolating valve) act as intermediaries to control and isolate pressure pathways. These valves prevent high pressure from reaching the low air pressure sensor by routing pressure through appropriate channels based on test requirements
2Reliability
If two separate air tightness detectors are used (one for low pressure, one for high pressure), then sensor protection is improved, but device complexity and cost increase
Solution Approach 1:
The system merges two separate detection instruments into one integrated air tightness detector that can perform both low pressure and high pressure tests. By combining multiple sensors, isolating valves, and pressure regulating components into a single device, it eliminates the need for two separate instruments while maintaining sensor protection through controlled isolation pathways
Solution Approach 2:
The air tightness detector is designed with multi-functionality to perform both low air pressure detection and high air pressure detection. The system uses switching mechanisms (isolating valves) to route pressure to appropriate sensors based on test requirements, making one device capable of replacing two specialized instruments
3Reliability
If two separate air tightness detectors are used, then sensor damage is avoided, but ease of operation deteriorates due to transferring and utilizing two instruments
Solution Approach 1:
The system combines multiple detection functions into one instrument, eliminating the need to transfer and set up separate low pressure and high pressure detectors. The integrated design allows users to perform both types of tests using a single device, significantly improving operational convenience
Data Source
AI summary
Embodiments of the present application disclose an apparatus for detecting air tightness. The apparatus has an air inlet end, an inflating end for an object to be tested inflating end and a standard part inflating end. The apparatus includes a pressure regulating component, a first bypass isolating valve, a second bypass isolating valve, a third bypass isolating valve, a first high air pressure sensor, a second high air pressure sensor, a low air pressure sensor, and a differential pressure sensor. By adopting the technical solutions according to the embodiments of the present application, a low air pressure sensor can be embedded in an air tightness detector suitable for tests under high pressure and the low air pressure sensor can be effectively protected in a high pressure environment, so that leakage tests under different inflation pressures can be implemented by one instrument.