A system and method for detecting leaks in an enclosure having a port and intended to prevent liquid material from exchanging into or out of the enclosure. A vacuum pump is coupled to the port and the enclosure is subjected to an applied vacuum pressure. Measurements of the mass and pressure within the enclosure while subject to the applied vacuum pressure are compared to expected values to detect a leak. In some embodiments, the physical arrangement of a valve of the enclosure is measured and compared to expected values to detect a leak.

A method and system for vacuum chamber integrity verification after chamber maintenance or venting. The method includes a computing system causing a measurement cycle that includes causing a pump to pump down pressure of the vacuum chamber for a set duration of time or to a target pressure; causing an isolation valve to isolate the vacuum chamber; receiving sensor data from an optical emission sensor; and analyzing the sensor data to determine whether the sensor data satisfies one or more sensor data criteria. The method further includes, the computing system, causing one or more repetitions of the measurement cycle until the sensor data meets the one or more sensor data criteria. The method further includes analyzing the sensor data that meets the sensor data criteria to determine at least one of vacuum chamber leak rate or vacuum chamber moisture content. The system includes the vacuum chamber, pump, isolation valve, optical emission sensor, and computing system.

A method and system for vacuum chamber integrity verification after chamber maintenance or venting. The method includes a computing system causing a measurement cycle that includes causing a pump to pump down pressure of the vacuum chamber for a set duration of time or to a target pressure; causing an isolation valve to isolate the vacuum chamber; receiving sensor data from an optical emission sensor; and analyzing the sensor data to determine whether the sensor data satisfies one or more sensor data criteria. The method further includes, the computing system, causing one or more repetitions of the measurement cycle until the sensor data meets the one or more sensor data criteria. The method further includes analyzing the sensor data that meets the sensor data criteria to determine at least one of vacuum chamber leak rate or vacuum chamber moisture content. The system includes the vacuum chamber, pump, isolation valve, optical emission sensor, and computing system.

A device for checking pouches adapted to contain a substance such as a liquid, a powder or a purée, includes at least one carousel adapted to convey the pouches, supporting them along its peripheral region, and at least one duct for supplying a test fluid that is connected to at least one nozzle insertable in a respective pouch conveyed by the carousel. The device further includes elements for detecting a variation in the pressure and/or flow rate of the test fluid in the supply duct after the test fluid has been supplied to, or drawn from, the pouch through the duct and the nozzle.

A device for checking pouches adapted to contain a substance such as a liquid, a powder or a purée, includes at least one carousel adapted to convey the pouches, supporting them along its peripheral region, and at least one duct for supplying a test fluid that is connected to at least one nozzle insertable in a respective pouch conveyed by the carousel. The device further includes elements for detecting a variation in the pressure and/or flow rate of the test fluid in the supply duct after the test fluid has been supplied to, or drawn from, the pouch through the duct and the nozzle.

Systems and methods for leak detection of aircraft doors. One embodiment is an apparatus for leak testing a seal between an aircraft door and a fuselage of an aircraft. The apparatus includes a structural frame that includes a suction cup configured to suction an outer surface of the aircraft door. The structural frame further includes legs to extend in length to push the structural frame away from the fuselage and cause the suction cup to pull the aircraft door toward an outside of the aircraft to tighten the seal between the aircraft door and the fuselage of the aircraft.

The current invention mitigates the problem of incorrect determinations of leaking packages during vacuum decay leak detection testing. As described in this disclosure, a testing chamber used for vacuum decay leak detection testing is exposed to interferences when not under vacuum or at low pressure conditions between testing cycles. By measuring one or more exposure time intervals immediately preceding a present test cycle, it is possible to improve detection of leaking packages by adjusting raw measured pressure gathered during vacuum decay leak testing based upon the length of exposure times and create corrected pressure data used to improve vacuum decay leak detection.

The current invention mitigates the problem of incorrect determinations of leaking packages during vacuum decay leak detection testing. As described in this disclosure, a testing chamber used for vacuum decay leak detection testing is exposed to interferences when not under vacuum or at low pressure conditions between testing cycles. By measuring one or more exposure time intervals immediately preceding a present test cycle, it is possible to improve detection of leaking packages by adjusting raw measured pressure gathered during vacuum decay leak testing based upon the length of exposure times and create corrected pressure data used to improve vacuum decay leak detection.

An internal combustion engine for a motor vehicle includes a crankcase ventilation device for removing blow-by gas from a crankcase, a pressure sensor being provided for measuring the gas pressure in said crankcase, and a control unit connected to and in communication with the crankcase ventilation device being configured and/or programmed to run a tightness test for said crankcase ventilation device when the internal combustion engine is switched off.

The present invention relates to instrumentation for underwater use powered by means of a battery and provided with a pressure sensor capable of periodically detecting pressure values inside the main body of the instrumentation.

The present invention also relates to a method for detecting possible pressure drops inside the main body of the instrumentation over time.

The instrumentation of the present invention enables carrying out efficient and inexpensive self-diagnosis of the pressure inside the body of the device, every time the battery is changed or also during manufacture of the instrument.