Water Resistance Testing Using Reference Chamber for Environmental Compensation
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Solution Overview
Problem
Conventional methods for testing the water resistance of mobile terminals are time-consuming, unreliable, and can damage the devices due to the lack of consideration for external environmental factors like temperature and humidity, leading to inaccurate results and potential device damage.
Innovation Solution
An apparatus using a reference chamber unit to account for external environmental factors, incorporating a suction unit to remove air from the test chamber, and a buffer tank to stabilize high-pressure air for precise water resistance testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile terminal is immersed in water to test water resistance, then the water resistance can be checked, but the mobile terminal may be damaged and the test becomes time-consuming
Solution Approach 1:
The patent replaces the traditional mechanical water immersion test with a pneumatic pressure test system. A test chamber unit applies controlled air pressure to the mobile terminal, and pressure changes are measured to detect water infiltration without physically submerging the device in water. This substitution eliminates the risk of water damage while maintaining test reliability.
Solution Approach 2:
The patent introduces a reference chamber unit as an intermediary to account for environmental factors. The reference chamber experiences the same environmental conditions (temperature, humidity) as the test chamber but does not contain the mobile terminal. By comparing pressure changes between the test chamber and reference chamber, the system isolates the effect of environmental factors from actual water infiltration, enabling accurate testing without water immersion.
2Measurement precision
If environmental factors are not considered in the test, then the test process is simple, but the test accuracy is compromised
Solution Approach 1:
The patent divides the testing system into two separate functional units: a test chamber unit containing the mobile terminal and a reference chamber unit containing only a reference space. This segmentation allows independent measurement of environmental effects (reference chamber) and actual test results (test chamber), improving measurement precision while keeping each unit's internal structure relatively simple.
Solution Approach 2:
The reference chamber unit serves as an intermediary that captures environmental factor effects. By measuring pressure changes in the reference chamber under the same environmental conditions, the system creates a baseline for comparison. The controller subtracts reference chamber pressure changes from test chamber pressure changes to isolate actual water infiltration signals, thereby improving accuracy without requiring complex environmental sensing equipment in the test chamber itself.
3Productivity
If high-pressure air is directly supplied without stabilization, then the test can be performed quickly, but the pressure is unstable leading to inaccurate results
Solution Approach 1:
The patent incorporates a buffer tank in the air supply line between the compressor and test chamber. The buffer tank pre-stabilizes the high-pressure air by dampening pressure fluctuations before the air enters the test chamber unit. This preliminary stabilization action ensures consistent pressure application during the test, improving measurement accuracy while maintaining rapid test execution.
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 apparatus provides a more accurate and efficient water resistance test by accounting for environmental factors and stabilizing air pressure, reducing the risk of device damage and improving test reliability.
Implementation Method 1
a suction unit is configured to suck air from the test chamber unit
Implementation Method 2
a buffer tank is employed in an air-supply means so as to stabilize high-pressure air to be injected into a compressor
Data Source
AI summary
Provided is an apparatus for testing the water resistance of a mobile terminal, by which whether a mobile terminal is water-resistant is checked. Specifically, the apparatus uses a reference chamber unit in order to check the effect of external environmental factors, such as temperature, humidity and the like, in different places and times, in advance, and incorporates the effect of external environmental factors in a mobile terminal water resistance test in a test chamber unit, whereby a more precise test may be performed. The apparatus for testing the water resistance of a mobile terminal using a reference chamber unit is configured to include an air-supply means, a pressure regulator chamber unit, a test chamber unit, a reference chamber unit, a pressure-measuring instrument, and a controller.