An apparatus for detecting a puncture comprises a housing comprising a plurality of compartments. Each compartment comprises an opening for receiving a flow of air into the compartment. Each compartment also comprises a detection element mounted on an axle, the axle having a first end and a second end and being secured at said first end and said second end within the compartment. The detection element is rotatable about the axle and when a flow of air passes through the opening into the compartment, the detection element rotates around the axle in response to the flow of air.

A system for leak testing an envelope for a tire assembly can include a rim, an envelope sized to accommodate a green tire assembly and secured to the rim, a vacuum system in fluid communication with the envelope, and a controller. The controller can be configured to pressurize the envelope to a predetermined pressure, compare a slope of pressure over time to a predetermined value, and enable proceeding with a depressurization of the envelope responsive to determining the slope of the pressure over time being more than or equal to the predetermined value.

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 method and system of testing for package leaks by a test system is disclosed. The test system includes a vacuum source and a test chamber in which a package is received for testing. A package is placed in the test chamber, and a vacuum is drawn on the test chamber by the vacuum source. A predetermined pressure level in the test system is detected, and based upon the detection of the predetermined pressure level, the test system determines when to stop drawing the vacuum. The test chamber is isolated from the vacuum source based upon the determination, and subsequently the test system detects the presence or absence of a leak in the package based on pressure measurements in the test chamber. A timer may be used to determine the delay in isolating the test chamber from the vacuum source after detection of the predetermined pressure level.

Device for testing the sealing of at least one system for insulating two mediums in a sealed manner, the system including a flange and a sealed door mounted in the flange, the test device including a casing including an inflatable seal intended to contact, in the inflated state, with the system and to ensure a sealing enabling the definition of a test volume between the system and the casing, a pneumatic pump and a pneumatic circuit configured to connect, in a first step, the pump to the inflatable seal such that the pump inflates the inflatable seal, and in a second step the pump to the test volume such that the pump generates in the test volume a pressure at a given value, and sensor for measuring the pressure in the test volume.

A method for in-line leak testing of blow moulded containers wherein a conveyor line is fed with a continuous stream of blow moulded containers from a blow moulding machine, at least one measuring head is temporarily connected to a first blow moulded container. The measuring head is moved in order to follow the movement of said first blow moulded container which is pressurized by a source of pressurized gas, the source of pressurized gas is disconnected, said at least one measuring head is used to measure the pressure decay therein. The pressure decay is compared with stored data for the pressure decay of acceptable containers and an accept or non-accept signal is generated which implies proceeding or disposal of said first blow moulded container. The measuring head is moved against the moving direction of the conveyor line to a subsequent blow moulded container, and the process is repeated.

A power electronics unit for an aircraft and a method of determining the integrity of a power electronics unit are provided. The power electronics unit comprises an electric machine controller; a heatsink arranged to conduct heat from the electric machine controller; a housing comprising a sealed internal volume enclosing the electric machine controller and heatsink; a dielectric liquid partially filling the internal volume to cover the electric machine controller; a gas pocket within the internal volume; a pressure sensor arranged to measure a pressure of gas within the gas pocket; a temperature sensor arranged to measure a temperature within the internal volume; and a controller. The controller is configured to receive signals from the pressure sensor and temperature sensor, determine a pressure and temperature from the received signals and provide an output signal dependent on the determined temperature and pressure.

A battery case analyzing apparatus includes a sealing portion which covers an injection hole formed on an upper side of a battery case. The sealing portion includes a lower side contacting the upper side of the battery case, a gas injection passage, and a vacuum forming passage formed in the sealing portion. The apparatus includes a gas injection line which is connected to an inlet of the gas injection passage formed on an upper side of the sealing portion, a vacuum forming line which is connected to an outlet of the vacuum forming passage formed on the upper side of the sealing portion, a gas supply portion configured to inject gas into the battery case through the gas injection line, and a vacuum pump which is connected to the vacuum forming line to form a vacuum in a vacuum forming groove formed on the lower side of the sealing portion.

The invention relates to a method for the gross leak measurement of an at least partially incompressible test object (18) in a film chamber (12) that comprises at least one flexible wall region and is connected, in a gas-conducting manner, to a pressure sensor (30), a vacuum pump (26) and, by way of a calibration valve (34), to a calibration chamber (36) enclosing a calibration volume (37), comprising the steps of evacuating the film chamber (12), measuring the pressure curve within the film chamber (12) after the evacuation is completed, connecting, in a gas-conducting manner, the calibration volume (37) to the inner volume of the film chamber (12) during the measurement of the pressure curve, the pressure being measured before the gas-conducting connection is established, and with the gas-conducting connection established, to the film chamber (12), and the pressure in the calibration chamber (36) prior to the connection to the film chamber (12) being higher or lower than the pressure in the film chamber (12), characterized in that the pressure difference p.sub.leer between the pressure before the gas-conducting connection is established and the pressure with a gas-conducting connection to the film chamber (12), in the case of an empty film chamber (12) comprising no test object (18), is compared to the corresponding pressure difference p.sub.Prfling when a test object (18) is present in the film chamber (12).

The present invention relates to a method for producing a bag in the interior space of a container and for testing said bag, and to a system for this purpose, to a computer program product for execution, and to the use of the system for the methods.