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367results about How to "Avoid dragging" patented technology

Underwater pipeline detection tracking system and detection method of automatic remote control underwater robot

The invention discloses an underwater pipeline detection and tracking system and detection method of an automatic remote control underwater robot. The underwater pipeline detection and tracking system comprises a lower computer and an upper computer. The lower computer is arranged underwater, and the upper computer is arranged on a water surface mother ship. The lower computer comprises a sensor module, an optical visual module, an embedded controller and an underwater optical transceiver. The sensor module and the optical visual module are connected with the signal input end of the embedded controller respectively. The signal output end of the embedded controller is connected with the signal input end of the underwater optical transceiver. The upper computer comprises an overwater optical transceiver, a water surface monitoring module and a manual operator. The manual operator is in circuit connection with the water surface monitoring module which is in circuit connection with the overwater optical transceiver. The underwater optical transceiver is connected with the overwater optical transceiver through optical fibers. The automatic remote control underwater robot can transmit images in real time, the water surface mother ship can monitor the underwater environment in real time, safety of the complex underwater operation condition is guaranteed, and detection and tracking tasks of an underwater pipeline are finished.
Owner:SHANGHAI MARITIME UNIVERSITY

Charge controller of wind turbine generator and control method thereof

InactiveCN101702532APrevent draggingTo achieve maximum utilizationBatteries circuit arrangementsElectric powerCharge controllerMicro computer
The invention discloses a charge controller of a wind turbine generator and a control method thereof, and the charge controller comprises a rectifier circuit connected with the output of the wind turbine generator and is characterized in that the output end of the rectifier circuit is connected with a battery pack through a switch K1, an unloading loop and a BOOST circuit, and the unloading loop and the BOOST circuit are further connected with a control circuit. The rotational speed of a wind turbine is determined by detecting the frequency of the output voltage of the wind turbine generator, thereby rapidly and effectively protecting the wind turbine generator. The charge controller is provided with the BOOST circuit with the novel control mode, and the start and the stop of the BOOST circuit are controlled according to the detected rotational speed value of the wind turbine generator, thereby realizing the effective charge under the low wind speed condition and preventing the wind turbine generator from dragging and stopping. The maximum utilization of wind speed can be realized by the mutual coordination of the BOOST circuit and the unloading circuit. The limited-voltage and limited-current charge of batteries can be realized and the service life of the batteries can be prolonged through the intelligent control of a single chip micro-computer.
Owner:GLORYMV ELECTRONICS

Tri-state overrunning clutch

The invention provides a three-state overrunning clutch which comprises an outer circle, an inner circle, a plurality of wedge blocks positioned between the outer circle and the inner circle, and an outer holding rack and an inner holding rack positioned between the outer circle and the inner circle and holding the plurality of wedge blocks. A plurality of arc grooves are formed on the working face of the outer circle and each arc groove is matched with a working face of the corresponding wedge block and holds the working face inside the arc groove; the inner holding rack is provided with a plurality of protruding plates axially extending outwards, and each protruding plate is provided with oblique holes inclined relative to the axial direction. An axial sliding poke tray is arranged on the outer circumference of the outer circle, wherein a plurality of poke rods, which are respectively inserted into the corresponding oblique holes, are fixed on the poke tray. Through the electromagnetic driving mechanism, the poke tray slides axially on the outer circumference of the outer circle. By removing the poke tray, the wedge blocks are controlled to completely move off the working face of the inner circle, so that the outer circle and the inner circle can rotate freely in both the positive and the negative directions, thus achieving the two-way separating working state of the three-state overrunning clutch.
Owner:BYD CO LTD

Underground environment monitoring system and method based on mooring unmanned aerial vehicle

The invention relates to an underground environment monitoring system and method based on a mooring unmanned aerial vehicle, and belongs to the field of underground environment monitoring. The underground environment monitoring system comprises a hand-held terminal and a PC in wireless connection with a flat intelligent remote controller, the PC and a power converter are connected with a wound rotor through cables, the wound rotor is inside provided with a driving motor and a tension sensor, and the wound rotor is connected with a mooring unmanned aerial vehicle flight monitoring platform through a cable. The underground environment monitoring method comprises starting an automatic pay-off and take-up device; starting an acquisition system of the mooring unmanned aerial vehicle flight monitoring platform; acquiring environmental parameters, image information and motion parameters, and returning the above to a ground monitor station; carrying out data processing and analysis; judging whether the parameters exceed the standard, giving a danger alarm until people evacuate, and making a return flight; and flying to sky over the parking apron and safely landing. According to the invention, the technical problem that a conventional underground environment monitoring system is low in automation degree, hard to repair, low in safety, and poor in system stability, information transmission is limited, and the working time is restricted by electric energy is solved.
Owner:HARBIN ENG UNIV +2
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