The invention provides a dynamic seal test device for cryogenic fluid medium. The dynamic seal test device includes stator unit, rotor unit, slipway, servo motor unit and sensors. The tested seal is installed inside the stator, and the thermal insulation stator and vacuum rotor together form a dynamic seal test structure. The seals and shaft sleeves can be flexibly replaced, which is beneficial to study the influence of different seal types, structure, and seal land configurations on the sealing performance. The servo motor provides power for the rotor and controls the rotation speed. The device greatly improves the thermal insulation capacity to avoid the gasification for the cryogenic fluid medium induced by the heat transfer from environment so that ensuring the stability of the test device.

The invention provides a dynamic seal test device for cryogenic fluid medium. The dynamic seal test device includes stator unit, rotor unit, slipway, servo motor unit and sensors. The tested seal is installed inside the stator, and the thermal insulation stator and vacuum rotor together form a dynamic seal test structure. The seals and shaft sleeves can be flexibly replaced, which is beneficial to study the influence of different seal types, structure, and seal land configurations on the sealing performance. The servo motor provides power for the rotor and controls the rotation speed. The device greatly improves the thermal insulation capacity to avoid the gasification for the cryogenic fluid medium induced by the heat transfer from environment so that ensuring the stability of the test device.

Disclosed is a sensor system for retrofitting a water supply of an airplane to detect leakage. The system includes a housing having a first band with an inner diameter sized to receive a necked portion of a valve for consumer access to the water supply. The system includes a first transducer disposed on the first band operable to provide a position measurement corresponding to a relative position between a head of the valve and the necked portion. The system includes a second transducer operable to provide a pressure measurement corresponding to a pressure of a compressed gas in a water tank of the water supply. The system includes a controller having input channels operable to receive the position measurement and the pressure measurement. The controller is operable to indicate a leak condition.

An apparatus and method for determining if a pressure differential exists between the interior and exterior of a wrapped and sealed bundle of tobacco industry products. The wrapped and sealed bundle has a barrier layer that deflects when a pressure differential is applied and the apparatus comprises a sensor operable to detect that deflection.

An apparatus and method for determining if a pressure differential exists between the interior and exterior of a wrapped and sealed bundle of tobacco industry products. The wrapped and sealed bundle has a barrier layer that deflects when a pressure differential is applied and the apparatus comprises a sensor operable to detect that deflection.

A monitoring device (118) for monitoring the leak-tightness of a vacuum-insulated system has a corrugated bellows (108) which is connected in terms of flow to an evacuated space (104) of the vacuum-insulated system in such a way that, in the event of an increase in pressure in the evacuated space, the length of the corrugated bellows (108) is adjusted beyond a threshold value. A position detector (113) connected to an energy store (115) responds to the change in length of the corrugated bellows and outputs a signal. The position detector outputs a signal to a display device (116), which provides an indication if a leak in the vacuum-insulated system occurs.

A monitoring device (118) for monitoring the leak-tightness of a vacuum-insulated system has a corrugated bellows (108) which is connected in terms of flow to an evacuated space (104) of the vacuum-insulated system in such a way that, in the event of an increase in pressure in the evacuated space, the length of the corrugated bellows (108) is adjusted beyond a threshold value. A position detector (113) connected to an energy store (115) responds to the change in length of the corrugated bellows and outputs a signal. The position detector outputs a signal to a display device (116), which provides an indication if a leak in the vacuum-insulated system occurs.

A form-fill-seal machine forms a bag by filling and sealing a packing object in a wrapping material. The form-fill-seal machine includes a thickness adjustment unit which adjusts a thickness of the bag and a control unit which controls an operation of the thickness adjustment unit. The control unit acquires thickness information obtained in a rear stage of the form-fill-seal machine and relating to a thickness of the bag and controls the operation of the thickness adjustment unit on the basis of a result obtained by performing statistical processing on the thickness information.

A device, system, and method for detecting a leak (and determining the leak rate of the leak) for equipment, particularly generators, the device including a main body connected to the tested equipment and to an air supply source, wherein the main body includes a number of stages each having a valve and orifice such that flow of air through the independent stages is selectively controllable, where a change in the differential pressure recorded during flow of the air through a particular stage indicates a leak, and wherein the differential pressure recorded can be used to calculate the rate of leak in the equipment.

An apparatus and a method for inspecting a leak of a battery cell are provided. An apparatus for inspecting a battery cell leak to inspect whether a battery cell leaks includes: a vacuum chamber including an upper chamber and a lower chamber and configured to set a receiving space to a controlled pressure different from an external first pressure, the upper chamber and the lower chamber being arranged to face each other with the receiving space for a battery cell therebetween and providing sealing for the receiving space; a vacuum pipe valve fluidly connected to the receiving space for the battery cell to set the receiving space to a second pressure less than the first pressure; and a thickness measuring sensor configured to measure a before-vacuum thickness of the battery cell under the first pressure and measure an after-vacuum thickness of the battery cell under the second pressure.

According to the present disclosure, an apparatus and a method for inspecting a battery cell leak, capable of easily and precisely capturing damage to an exterior material of a battery cell are provided.