45results about How to "Easy and stable control" patented technology

The invention discloses an underwater structure detection robot control system and a motion control method. A water surface system comprises a water surface console, a water surface communication transceiver and an umbilical cable, and an underwater system comprises an underwater communication transceiver, a power supply unit, an embedded microcontroller, a power-propelled unit, a vision illumination unit, a motion switching unit, a safety protection unit and a sensor unit. Each function module is in a modular design, mounting and dismounting are convenient, the water surface console has an emergent stopping function, a wireless connection tablet personal computer is configured, movable monitoring can be achieved, communication modes are various, the data volume is large, the motion switching unit supports switching of two motion modes such as swimming and crawling, and reliable safety protection such as data storage and voltage and current detection can be achieved. By means of the underwater structure detection robot control system and the motion control method, the motion control method is based on a generalized prediction proportion integration differentiation (PID) control algorithm, system energy consumption can be effectively reduced, loads of components and parts are decreased, and a robot can be conveniently and stably controlled.

The invention relates to a device for producing a polylactic acid material. The device comprises a pre-melting kettle, a pre-polymerization kettle, a tubular reactor and an extruder, wherein the pre-melting kettle is used for melting lactide monomers; the pre-polymerization kettle is used for pre-polymerization of lactide monomer melt; the tubular reactor is used for directly polymerizing the prepolymer; the extruder is used for removing residual lactide monomers from the obtained polymer; and the pre-melting kettle, the pre-polymerization kettle, the tubular reactor and the extruder are sequentially connected together. The invention also relates to a method for producing the polylactic acid material. The method comprises the following steps of: a) melting the lactide monomers; b) pre-polymerizing the lactide monomer melt; c) directly polymerizing the prepolymer obtained in the b) in the tubular reactor; and d) removing the residual lactide monomers from the polymer obtained in the c), and thus obtaining the polylactic acid material. The device and the method can be used for producing the polylactic acid material with high monomer conversion rate and low monomer residue.

A switching booster power circuit includes a power switch, a booster circuit, a switching control, a voltage detector and a delay circuit. The voltage detector detects an input voltage value at a predetermined point of an electricity supply line from the power switch to an electric load, and determines the input voltage value to be larger than a predetermined voltage threshold or not. The delay circuit outputs an enabling signal enabling the switching control to operate, when a predetermined time period is elapsed after the input voltage value becomes larger than the voltage threshold.

The invention discloses an intelligent sludge incinerator. The sludge incinerator comprises an outer furnace body, an inner furnace body, a base, an electrically driven automatic slag discharge grate, a screw feeder, an automatic slag discharge device, a diesel oil burner, a primary air inlet system, a secondary air inlet system and a controller, wherein the controller is used for controlling one or more temperature sensors arranged at a hearth, a smoke outlet and a primary inlet, an oxygen quantity sensor arranged at the smoke outlet and a weight sensor for automatic slag discharge. The intelligent sludge incinerator can realize reduction and harmlessness of sludge by adopting a bubbling suspension combustion method, and meanwhile realizes low discharge of pollutants; the combustion is stable by automatic control of parameters of primary and secondary air inlet, and the temperature in the incinerator is controlled at 850 to 950 DEG C all the time for combustion; and the sludge incinerator has high automation degree, saves labor, relieves labor intensity, realizes stable incineration of the sludge, obviously reduces the fault rate, and has low maintenance expense and humanized operation.

The invention belongs to the technical field of multiphase flow mixing correlation and discloses a dual-plastid acoustic-resonance mixing device suitable for a compound energetic material. The dual-plastid acoustic-resonance mixing device comprises an installation platform, shock excitation plastid, load plastid, a first elastic support, a second elastic support and a third elastic support, wherein the installation platform comprises a bottom plate and a top plate which are oppositely arranged, the fist elastic support is connected with the shock excitation plastid and the bottom plate, the second elastic support is connected with the load plastid and the shock excitation plastid, the third elastic support is connected with the load plastid and the bottom plate. The dual-plastid acoustic-resonance mixing device disclosed by the invention can effectively reduce driving power consumption, reduce acting force on foundation and improve stability and safety.

The invention relates to the technical field of a printing and dyeing device, and discloses an intermittent circulating two-sided flipping high-efficiency printing and dyeing device. The intermittentcirculating two-sided flipping high-efficiency printing and dyeing device comprises a box body. A base is fixedly arranged at the inner bottom of a printing and dyeing chamber, and two groups of fastening devices used for clamping and stabilizing a fabric to be printed and dyed are symmetrically arranged on the upper side and the lower side of the printing and dyeing chamber. A rotating seat is arranged at the bottom of the side, far away from the center of the box body, of each fastening device. A group of driven gears is fixedly arranged at the middle part of a rotating guide rail positionedon the upper side. The left side and the right side of the driven gears are intermittently engaged with a second incomplete gear and a first incomplete gear which are respectively placed in a left transmission chamber and a right transmission chamber. The tops of the first incomplete gear and the second incomplete gear are rotationally connected with servo motors through rotation shafts, and theservo motors are fixed to the inner tops of the transmission chambers. Spraying ports and spraying rows are fixedly arranged in the middle parts of the left side wall and the right side wall of the printing and dyeing chamber, and the spraying rows can comprehensively point to the fabric at the middle part of the printing and dyeing chamber. The intermittent circulating two-sided flipping high-efficiency printing and dyeing device has the advantages that power is fully used, the uniformity of printing and dyeing is high, the speed is high, and the efficiency is high.

The invention provides a rotatable street lamp. The rotatable street lamp comprises a lamp base, a lamp post and a rotating device. The rotating device comprises a power device, a transmission structure and a positioning lamp shade. The power device can provide rotating power for the lamp base. The positioning lamp shade can limit the position of the internal structure and protect the internal structure against the sun and rain. The transmission structure comprises a crank, a connecting rod, a rocker, a worm gear and a worm. The lamp base is fixed to one end of the rocker so as to swing along with the rocker. A rotating shaft in the vertical direction is arranged at the other end of the rocker so that the rocker can rotate relative to the positioning lamp shade. The middle portion of the rocker is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the crank. The crank and the worm gear are fixed together and rotate around the same axis. The worm and the worm gear are matched and can achieve decelerating transmission. The power device is connected with the worm and can drive the worm to rotate.

The invention provides a rotatable street lamp which comprises a lamp holder, a lamp post and a rotation device. The rotation device comprises a power device, a transmission structure and a positioning lampshade, the power device can provide rotation power for the lamp holder, internal structures can be positioned under the constraints of the positioning lampshade, the positioning lampshade can prevent the internal structures from being exposed to the sun and rain, the transmission structure comprises a crank, a connecting rod, a rocker, a turbine and a worm, and the lamp holder is fixed to an end of the rocker so that the lamp holder can swing along with the rocker; a horizontal rotary shaft is arranged in the middle of the rocker so that the rocker can rotate relative to the positioning lampshade; the other end of the rocker is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the crank, the crank and the turbine are fixed to each other and can rotate around the same shaft, the worm and the turbine are matched with each other and can carry out deceleration transmission, and the power device is connected with the worm and can drive the worm to rotate.

The invention provides a power device. The power device comprises a propeller, a duct and a driving unit. The propeller is rotatably installed in the duct, and the driving unit drives the propeller torotate. The inner wall of the duct is of a conical structure; the propeller is mounted in the duct in a sliding manner; and the sliding control device drives the propeller to slide along the rotatingaxis. The sliding control device drives the propeller to slide, and the thrust output of the duct can be adjusted by adjusting the propeller duct gap between the blade tip of the blade and the conical inner wall of the duct. The motor does not need to control power output of the power device through large-amplitude frequent acceleration and deceleration, thereby effectively reducing motor rotating speed fluctuation amplitude, reducing motor load and prolonging service life of the motor. The working efficiency of the power device is improved.

The invention relates to a drilling device for valve processing and belongs to the technical field of valve processing equipment. The drilling device comprises a base, wherein two fixing plates and asupporting table are mounted on the upper surface of the base; the supporting table is used for supporting a valve; a first rotating motor is fixedly mounted at the bottom of a top plate positioned atthe tops of the fixing plates; a first threaded rod is mounted at the bottom of the first rotating motor; a gear plate is mounted at the bottom of the first threaded rod; the first threaded rod is sleeved by a sliding plate which is in threaded connection with the first threaded rod; two ends of the sliding plate are slidably connected with the fixing plates; and drilling rods which are rotationally connected with the sliding plate are mounted at the bottom of the sliding plate and connected with the gear plate through transmission mechanisms. The rotating drilling operation can be achieved when the drilling rods are adjusted to rise and fall; not only can the arrangement of driving equipment be reduced and the structure be optimized, but also the control can be more convenient and stable, the drilling efficiency can be improved, and more energy can be saved; and through the arrangement of a rotatable supporting plate equipped with a fixing mechanism, the valve can be conveniently fixed and rotationally adjusted, the repeated drilling operation can be facilitated, and the practicability can be improved.

The invention discloses a firefighting device based on an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The firefighting device comprises a water tank, a booster pump, a PLC control cabinet, an electromagnetic valve and a power box for supplying power to the booster pump, the PLC control cabinet and the electromagnetic valve. The booster pump, the PLC control cabinet and the power box are all mounted on the outer top surface of the water tank, and the electromagnetic valve and the booster pump are correspondingly and electrically connected with the PLC control cabinet. A water inlet of the booster pump communicates with a water outlet of the electromagnetic valve through a pipeline, a water inlet of the electromagnetic valve communicates with thewater tank through a pipeline, and a plurality of high-pressure nozzles formed in the outer bottom surface of the water tank are connected to a water outlet of the booster pump through pipelines. Fireextinguishing operation can be carried out by sprinkling water and throwing fire extinguishing bombs at the same time, and the fire extinguishing effect is effectively improved; and the firefightingdevice is simple in structure and convenient and stable to control, application of the unmanned aerial vehicle in the field of fire extinguishing and disaster relief can be promoted and enhanced, personnel investment in the fire extinguishing personnel process is reduced, and casualties caused in the fire extinguishing process are reduced.

The invention belongs to the technical field of alpha nuclide measurement, and particularly relates to an alpha nuclide sample source electro-deposition sample preparation device which comprises a plurality of sample preparation units arranged on an equipment base (13), the sample preparation units can conduct electro-deposition operation on alpha nuclide sample sources, and electro-deposition tanks (7) and cooling tanks (8) on the sample preparation units are made of transparent glass materials. The device is simple in structure, low in price and easy to replace, cross contamination is prevented, the PH value of electro-deposition liquid can be conveniently adjusted, changes of the electro-deposition liquid can be conveniently observed, and the electro-deposition process can be stably controlled; the device has the advantages that the cooling temperature is easy to control in the alpha nuclide electro-deposition process, cross contamination is not prone to occurring, and integration is high, the stability of the alpha nuclide electro-deposition process is improved, a high-quality alpha nuclide sample source is prepared, and the requirement for alpha nuclide monitoring is met.

The invention discloses an inflatable flat winding chuck which comprises a chuck body, an end shaft is rotatably arranged on one side of the chuck body, a plurality of chuck expansion blocks are slidably arranged on the side, back to the end shaft, of the chuck body, sliding grooves matched with the chuck expansion blocks are formed in the chuck body, and the outer ends of the chuck expansion blocks can stretch out of the sliding grooves; a chuck cover plate is arranged at the ends, back to the chuck body, of the chuck expansion blocks, limiting blocks are arranged on the chuck body, sliding grooves matched with the limiting blocks are formed in the chuck expansion blocks, and first reset pieces matched with the limiting blocks are arranged in the sliding grooves; conical shafts are arranged between the chuck expansion blocks and the end shaft, and second reset pieces are arranged between the conical shafts and the chuck cover plate; the end surfaces of the conical shafts are matched with the chuck expansion blocks, and a synchronous belt wheel is arranged outside the chuck body; and a piston is arranged in the end shaft and rotationally connected with the conical shafts, and an air inlet channel matched with the piston is arranged in the end shaft. The inflatable flat winding chuck has the advantages that the inflatable flat winding chuck can be applied to winding of narrow materials and can reduce the narrow material winding cost while meeting the large opening diameter.