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278results about How to "Easy to trigger" patented technology

Load breaker arrangement

The subject matter of the present invention is a load breaker arrangement (1) for switching on and off a DC current of a DC current circuit in a photovoltaic plant with a semiconductor switching element (4) to avoid a switching arc, there being provided an electronic control unit (5) configured such that one or more signals are received by the control unit, and the load breaker arrangement (1) being configured such that in at least one current-carrying line of the DC current circuit there is galvanic separation by a switching contact that is automatically controllable by the control unit (5) in the switched-off condition and one or more control signals being transmitted to the load breaker arrangement (1) and a semiconductor switching element (4) interrupting the DC current so that the switching contact is de-energized, whereby
    • the signals are flaw signals that are received in case of a flaw in the PV generator, inverter or on the AC side, the DC current circuit being automatically switched on or off by the control signals in case of at least one flaw,
    • said arrangement being configured such that, during switch off,
    • said semiconductor switching element (4) is at first closed in a first step,
    • the switching contacts (K1, K2) of a first switching means are opened in a second step for the DC current to flow through said semiconductor switching element (4),
    • said semiconductor switching element (4) being again opened in a third step and
    • switching contacts (K1, K2) of a second switching means being opened in order to cause galvanic separation to occur
    • and that an additional manually operable load breaker (8) is connected, said manually operable load breaker (8) being a manually breakable DC current connecting system with plug contacts for photovoltaic plants that is provided with an electronic arc quenching system.
Owner:SMA SOLAR TECH AG

Methods, systems and apparatus for paced breathing

Methods, systems and/or apparatus for slowing a patient's breathing by using positive pressure therapy. In certain embodiments, a current interim breathing rate target is set, and periodically the magnitude of a variable pressure waveform that is scaled to the current interim breathing rate target is increased if the patient's breathing rate is greater than the interim breathing rate target in order to lengthen the patient's breath duration. The magnitude of the pressure increase may be a function of the difference between the interim breathing rate target and the patient's breathing rate. The interim breathing rate target may be periodically reduced in response to the patient's breathing rate slowing down toward the current interim breathing rate target. The variable pressure waveform cycles from an inhalation phase to an exhalation phase when the patient airflow decreases to a cycle threshold, the cycle threshold being a function of flow versus time within a breath and generally increasing with time. Different interim breathing rate targets have different cycle threshold functions, and the cycle threshold functions allow easier cycling as the interim breathing rate targets decrease. Similarly, the variable pressure waveform triggers from an exhalation phase to an inhalation phase when the patient airflow increases to a trigger threshold, the trigger threshold being a function of flow versus time within a breath and generally decreasing with time. Different interim breathing rate targets have different trigger threshold functions, and the trigger threshold functions allow easier triggering as the interim breathing rate targets decrease.
Owner:RESMED LTD

Well dynamic liquid level auto detector

The present invention relates to a dynamic automatic liquid-level detector for an oil well and belongs to the oil field automatic detecting technical field; the dynamic automatic liquid-level detector consists of a test tube (1), a sensor (2), an electromagnetic valve (3), a container (4), an electromagnetic valve (5), an electronic unit (6), a sound velocity determine tube (7), and a blind-terminal(8); the test tube (1), the solenoid valve (5) and the container are connected in series way one by one, which easily triggers and controls the width and the intensity of a pulse sound source; the container is connected with the test tube (1) through the electromagnetic valve (3), and communicated with atmosphere or connected with external low-voltage pipes through the electromagnetic valve (5); a special thin and long blind pipe is arranged beside the three-way sensor at the middle of the test tube to test the real velocity of sound; the open and the close of the electromagnetic valves (3) and (5) are controlled by the electronic unit (6) which collects the signals from the sensor (2) and calculates the depth of the liquid, and then displays and carries out a further transfer of the data; the dynamic automatic liquid-level detector has the advantages that the dynamic automatic liquid-level detector can spring the sound source automatically; and can control the pulse and the width of the sound source; and also can detect the velocity of the sound quickly and correctly without being effected by the factors of casing pressure, temperature, the amount of liquid contained in gas.
Owner:UNIV OF SCI & TECH BEIJING

Laser trigger vacuum switch and switch system

The invention discloses a laser trigger vacuum switch and a trigger system apparatus thereof. The laser trigger vacuum switch comprises a closed housing, a first electrode main member and a second electrode main member. The first electrode main member comprises an arcing electrode, a first electrode flange, a first electrode platform and a focusing mirror. The second electrode main member comprises an arcing electrode, a second electrode flange, a second electrode platform and a target electrode. The trigger system apparatus mainly comprises a computer, a converter, a switch circuit board, a laser and the laser trigger vacuum switch. The laser trigger vacuum switch has a working voltage as high as 30 kV and a working current as high as 500 kA. The problems of difficult trigger high voltage isolation, trigger stability, short service life and the like by use of electric pulses in the prior art are solved, the laser trigger energy can be effectively reduced, and the time delay and jittering of a switch device are improved. The laser of the trigger system apparatus realizes miniaturization completely, a matched laser system is greatly simplified, and a special power supply device, a special water cooling machine and a special laser collimation system are unnecessary.
Owner:HUAZHONG UNIV OF SCI & TECH
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