Box sealing state monitoring and evaluation method and monitoring system

Abstract

The invention relates to a method for monitoring and evaluating the sealing state of a box. The sealing state of the box is preliminarily evaluated by monitoring the air pressure change in the box: setting the standard temperature compensation curve P=P(T); setting the normal working temperature range in the box [ T1, T2], when the temperature in the box exceeds the normal working temperature range in the box, adjust the temperature in the box to the normal working temperature range [T1, T2]; set the external environment evaluation threshold X, combined with the standard temperature compensation curve P =P(T) to determine the standard air pressure compensation area [P(T)-X, P(T)+X]; set the standard time interval Δt, when the measured air pressure in the box P>P(T)+X or P< When the overpressure time t≤Δt corresponding to P(T)‑X, the measured air pressure in the box is regarded as the normal air pressure state. At the same time, the indicators of air pressure, humidity, and dust concentration in the box are further integrated to ensure the accuracy of judging the airtightness of the box and avoid misjudgment of the airtightness of the box. At the same time, the present invention also provides a corresponding monitoring system for the sealing state of the box to realize the monitoring of the sealing of the box.

Description

technical field [0001] The invention belongs to the technical field of sealing monitoring, and in particular relates to a method for monitoring and evaluating the sealing state of a box body and a monitoring system. Background technique [0002] Sealing is an important guarantee for product safety and reliability. For example, various electrical boxes equipped in rail vehicles, such as the battery box and charging box under the car, the high-voltage box on the roof, etc., usually have a large number of electrical components inside the box. The airtightness of the box body is highly required. Once the box body seal does not meet the design requirements or the box body seal is damaged, foreign matter such as dust and water vapor can easily enter the box body. Dust has the chargeability of dust particles, and it is easy to condense and settle around the electrical parts, thereby destroying the insulation strength of the electrical parts, causing poor contact or even short circu...

AI Technical Summary

Problems solved by technology

Due to the long repair and maintenance cycle of the equipment, the sealing problem of the box cannot be found and dealt with in time, which can easily lead to product failure and potential safety hazards

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