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Air tightness detector for soft packaging bags and boxes filled with liquid and detection method thereof

A technology for air tightness testing and flexible packaging bags, which is applied in the directions of measuring devices, fluid tightness testing, machine/structural component testing, etc. It can solve the problems of no public airtightness testing and achieve low cost, positive technical effects, The effect of simple detection methods

Pending Publication Date: 2018-08-28
高雅云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the technical defect in the prior art field that none of the flexible packaging bag airtightness detection devices discloses the airtightness detection of soft packaging bags and boxes containing liquid beverages, the present invention provides a method with high detection accuracy, and the detection results are not easily affected by the external environment. Convenient and low-cost airtightness testing device and testing method for flexible packaging bags and boxes containing liquid beverages

Method used

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  • Air tightness detector for soft packaging bags and boxes filled with liquid and detection method thereof
  • Air tightness detector for soft packaging bags and boxes filled with liquid and detection method thereof
  • Air tightness detector for soft packaging bags and boxes filled with liquid and detection method thereof

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Embodiment

[0048] Example: In a quiet environment, pressure is applied to the packaging bag box containing the liquid with the leakage point, and the acoustic signal test when the leakage occurs is actually collected. Leakage points can be made artificially, and the leakage can be formed by puncturing the hole with a needle or drawing the liquid with a medical syringe. When there is a leak, the acoustic signal collected by the microphone and Cooledit software has a sampling rate of 44.1KHz and 16 bits. Two kinds of acoustic signals are obtained by applying pressure to two different liquid-filled packaging boxes. The analysis results show that the collected acoustic signals caused by leakage have common characteristics. Therefore, the detection method of the present invention is reliable. The test results are as follows:

[0049] Figure 4 It is a time-domain waveform of the acoustic signal 1 collected when the beverage box has a leak, Figure 5 Is the time-frequency distribution diagram o...

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Abstract

The invention discloses an air tightness detector for soft packaging bags and boxes filled with liquid and a detection method thereof, which relate to the technical field of liquid packaging bag and box detection. The physical characteristic that a sound signal certainly exists when leakage exists is utilized, a mechanical pressing method is carried out on a soft packaging bag or box filled with liquid, so that the soft packaging bag or box with potential leakage can generate a sound signal which represents leakage, and the sound signal can be recorded, stored and analytically identified. Theembodiments prove that the invention can solve the problem on how to detect the air tightness of soft packaging bags and boxes filled with liquid. The detection method adopted by the invention is simple, reliable and lower in cost, and can be implemented by automatic production lines for soft packaging bags and boxes filled with liquid beverages.

Description

Technical field [0001] The invention relates to the technical field of liquid packaging bag box detection, in particular to an air tightness detection device and a detection method for a flexible packaging bag box containing liquid. Background technique [0002] Various liquid beverages have entered people's daily life. The liquid (beverage) contained in the flexible packaging box can be a variety of milk, beverages of various flavors, water, functional drinks, etc. These flexible packaging bags (boxes) for liquid beverages can be made of various materials that can complete the packaging function of liquid beverages, such as plastic, high-density fiber paper and plastic. In order to ensure food safety, flexible packaging bags containing liquid beverages are usually sealed. When the soft packaging bag box containing liquid beverages is not well sealed during the production process, the beverages and foods may deteriorate through the processes of production, circulation, transport...

Claims

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Application Information

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IPC IPC(8): G01M3/00
CPCG01M3/00
Inventor 高雅云
Owner 高雅云
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