PASSIVE ACOUSTIC UNDERWATER INTRUDER DETECTION SYSTEM

    公开(公告)号:MY165896A

    公开(公告)日:2018-05-18

    申请号:MYPI2012001969

    申请日:2010-11-03

    Abstract: A PORTABLE THREAT DETECTION APPARATUS (20) AND METHOD IS DISCLOSED WHICH MAY COMPRISE A PLURALITY OF ACOUSTIC EMISSION SENSORS (40) ARRANGED IN A CLUSTER (22), FORMING A POLYGON DEFINING AT LEAST TWO AXES OF ALIGNMENT BETWEEN RESPECTIVE PAIRS OF ACOUSTIC EMISSION SENSORS (40); A COMPUTING DEVICE (60) IN COOPERATION WITH A NON-TRANSITORY COMPUTER READABLE STORAGE MEDIUM COMPRISING COMPUTER READABLE INSTRUCTIONS FOR PERFORMING: RECEIVING A FIRST SIGNAL PRODUCED BY A FIRST ACOUSTIC EMISSION SENSOR (40) WITHIN A RESPECTIVE PAIR OF ACOUSTIC EMISSION SENSORS (40), IN RESPONSE TO THE FIRST ACOUSTIC EMISSION SENSOR (40) DETECTING AN ACOUSTIC EMISSION FROM A SOURCE, AND RECEIVING A SECOND SIGNAL PRODUCED BY A SECOND ACOUSTIC EMISSION SENSOR (40) WITHIN THE RESPECTIVE PAIR OF ACOUSTIC EMISSION SENSORS (40), IN RESPONSE TO THE SECOND ACOUSTIC EMISSION SENSOR (40) DETECTING THE ACOUSTIC EMISSION; DETERMINING A CROSS-CORRELATION FACTOR BETWEEN THE FIRST SIGNAL AND THE SECOND SIGNAL; AND, DETERMINING A BEARING TO THE SOURCE BASED ON THE CROSS CORRELATION FACTOR. (FIG. 1)

    Process and apparatus for alkyl halide fumigant recovery and conversion

    公开(公告)号:AU2018338626B2

    公开(公告)日:2022-11-10

    申请号:AU2018338626

    申请日:2018-09-27

    Abstract: Process and apparatus (10) are disclosed for capturing and converting an ozone-depleting alkyl halide fumigant from a fumigant/air mixed stream (14) by absorbing it into a metal hydroxide-alcohol buffer solution (26) in an absorber/scrubber (12) to produce a fumigant-free air stream (28). The captured alkyl halide in aqueous alcohol solution can actively react with the metal hydroxide in alcohol solution to produce a value-added product, such as a precipitate metal halide, and another alcohol that further enhances absorption. The absorbing solution is well-mixed with make-up alcohol and alkali streams to maintain the concentration of the metal hydroxide in the desired buffer solution range. The solid precipitate metal halide (52) is separated from the liquid stream, and the metal hydroxide-containing mixed alcohol stream (26) is recycled to the absorber/scrubber (12).

    PROCESS AND APPARATUS FOR ALKYL HALIDE FUMIGANT RECOVERY AND CONVERSION

    公开(公告)号:CA3077230A1

    公开(公告)日:2019-04-04

    申请号:CA3077230

    申请日:2018-09-27

    Abstract: Process and apparatus (10) are disclosed for capturing and converting an ozone-depleting alkyl halide fumigant from a fumigant/air mixed stream (14) by absorbing it into a metal hydroxide-alcohol buffer solution (26) in an absorber/scrubber (12) to produce a fumigant-free air stream (28). The captured alkyl halide in aqueous alcohol solution can actively react with the metal hydroxide in alcohol solution to produce a value-added product, such as a precipitate metal halide, and another alcohol that further enhances absorption. The absorbing solution is well-mixed with make-up alcohol and alkali streams to maintain the concentration of the metal hydroxide in the desired buffer solution range. The solid precipitate metal halide (52) is separated from the liquid stream, and the metal hydroxide-containing mixed alcohol stream (26) is recycled to the absorber/scrubber (12).

    Ac glow plasma discharge device having an electrode covered with apertured dielectric

    公开(公告)号:AU6248499A

    公开(公告)日:2000-04-03

    申请号:AU6248499

    申请日:1999-09-15

    Abstract: A method and apparatus for stabilizing glow plasma discharges by suppressing the transition from glow-to-arc includes a perforated or apertured dielectric plate having an upper surface and a lower surface and one or more holes extending therethrough. The perforated dielectric plate is positioned over the cathode. Each of the holes acts as a separate active current limiting micro-channel that prevents the overall current density from increasing above the threshold for the glow-to-arc transition. This allows for a stable glow discharge to be maintained for a wide range of operating pressures (up to atmospheric pressures) and in a wide range of electric fields include DC and RF fields of varying strength. In another embodiment, the device comprises an AC glow plasma discharge device wherein an apertured dielectric is placed over an electrode. The apertured dielectric may have one or more apertures or capillaries extending therethrough. The frequency of the AC source is adjusted to be matched to the characteristics of the apertured dielectric. At a proper frequency, jets come out of the apertures or capillaries, i.e. the capillaries get turned on and become electrodes to the opposite electrode. As such, the device goes from a glow state to a capillary plasma electrode discharge state. A second dielectric may be applied to the second electrode and the second dielectric may be solid or may be apertured.

    Glow plasma discharge device
    7.
    发明专利

    公开(公告)号:AU6468898A

    公开(公告)日:1998-10-12

    申请号:AU6468898

    申请日:1998-03-17

    Abstract: A method and apparatus for stabilizing glow plasma discharges by suppressing the transition from glow-to-arc includes a perforated dielectric plate having an upper surface and a lower surface and a plurality of holes extending therethrough. The perforated dielectric plate is positioned over the cathode. Each of the holes acts as a separate active current limiting micro-channel that prevents the overall current density from increasing above the threshold for the glow-to-arc transition. This allows for a stable glow discharge to be maintained for a wide range of operating pressures (up to atmospheric pressures) and in a wide range of electric fields include DC and RF fields of varying strength.

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