30results about How to "Easy to control working status" patented technology

The embodiment of the invention discloses a method for eliminating influence of a compensator on line distance protection. The method comprises the steps of obtaining a current of a series converter in the compensator or a line accessed by the compensator, and when the current is greater than a preset current threshold value and first duration time is greater than a first preset time threshold value, carrying out logout by the serial converter or a series transformer; or when the current does not satisfies the above-mentioned demand, obtaining a voltage of a busbar accessed by the compensator or the line accessed by the compensator, and when the voltage is smaller than or equal to a preset voltage threshold value and second duration time is greater than a second preset time threshold value, carrying out logout by the series converter and the series transformer. The embodiment of the invention also discloses a device for eliminating the influence of the compensator on the line distance protection.

The invention relates to the field of coal mining machine control and particularly relates to a coal mining machine positioning and attitude determination method with additional exterior orientation element constraints. The method comprises steps of step 1, providing real-time parameters by an inertial navigation system; 2, a visual positioning and attitude determination method; step 3, a fusion algorithm. The method has advantages of strong real-time performance, high sampling frequency, rich data and high attitude determination and positioning precision, uses multiple sensors to collect, settle and feed back state parameters of a coal mining machine, is convenient to control a working state of an underground coal mining machine, has a large amount of redundant data, has strong fault tolerance of the system, and is convenient to control a state of the coal mining machine.

The invention provides a testing apparatus of conductivity and electrical equipment. The testing apparatus comprises a square wave generation source, a first filter circuit, a testing electrode unit, a current detection circuit, a switch circuit, and a signal processing circuit. To be specific, the square wave generation source is used for generating a square wave signal. The first filter circuit is used for carrying out filtering processing on a square wave signal to obtain a sinusoidal signal not including a direct-current component, wherein the sinusoidal signal is used as a testing voltage. The testing electrode unit includes at least three groups of testing electrodes connected in parallel and is connected to the first filter circuit; and the testing electrode unit is used for applying a testing voltage to a to-be-tested medium. The current detection circuit is used for detecting a current signal flowing through the testing electrode unit and converting the current signal into a voltage signal. The switch circuit controls a working state of each group of testing electrodes among the at least three groups of testing electrodes. The signal processing circuit determines a conductivity of a to-be-tested medium according to a voltage signal outputted by the current detection circuit. According to the technical scheme, on the premise that the testing electrode is prevented from being polarized, a conductivity of a to-be-tested medium is tested accurately and demands of different testing scenes can be satisfied.

The embodiment of the present invention discloses a method of inhibiting the influence of a compensator on the line distance protection. The method comprises the steps of obtaining a first current of a line that the compensator accesses or a series-wound transverter in the compensator, and a first voltage of a bus or the line that the compensator accesses; when the first current is greater than a preset current threshold value, and the time of duration is greater than a first preset time threshold value, quitting the series-wound transverter and a series-wound transformer; when the first voltage is less than or equal to a preset voltage threshold value, and the time of duration is greater than a second preset time threshold value, setting an output voltage of the series-wound transverter as zero, obtaining a second current of an element corresponding to the first current, satisfying the conditions that the first current needs to satisfy, and quitting the series-wound transverter and a series-wound transformer; otherwise canceling the operation of setting the output voltage of the series-wound transverter as zero, and obtaining the first current when a second voltage of a line corresponding to the first voltage is greater than a preset voltage threshold value, and the time of duration is greater than a third preset time threshold value. The embodiment of the present invention discloses a device of inhibiting the influence of the compensator on the line distance protection.

The invention discloses a trimming device for garden trees. The trimming device comprises a fixed rod, one end of the fixed rod is provided with a telescopic rod, the end, away from the fixed rod, ofthe telescopic rod is provided with a trimming device body, one side of the telescopic rod is provided with a supporting frame, one end of the supporting frame is connected with the telescopic rod through a movable sleeve, and the end, away from the telescopic rod, of the supporting frame is provided with a clamping device; the trimming device body comprises a fixed plate, the lower end of the fixed plate is connected with the telescopic rod, one side of the fixed plate is provided with a first fixed block, a first movable rod is inserted in the first fixed block, the upper end of the first movable rod is provided with a first movable block, the end, away from the first movable rod, of the first movable block is provided with a second movable rod, one side of the first movable block is provided with a first rack, the upper end of the second movable rod is provided with a first blade, the side, located on the fixed plate, on the second movable rod is provided with a second fixed block,and the side, located on the fixed plate, of the first fixed block is provided with a third fixed block.

The invention provides a control system used for a temperature controller of an air conditioner, and relates to the technical field of control of temperature controllers. The control system used for the temperature controller of the air conditioner comprises a central processor, wherein the central processor, a power supply end, a manual operation control end, a control end for controlling air speed of a fan in the air conditioner, an indoor temperature sensor, and a control end for controlling the state of a water valve in the air conditioner are electrically connected or are connected through a wireless signal; and an automatic adjustor, a comparator and a time counter are arranged inside the central processor. An absolute temperature can be firstly controlled through manual preset absolute temperature control operations and one group of manually-set relative temperature control operations; a working state of the air conditioner is set, so that the air conditioner can be switched on at a higher or lower temperature by the manually-set relative temperature control operations when the air conditioner is switched on; and the temperature can be automatically adjusted, so that the air conditioner is more intelligent.

The embodiment of the invention provides a method for reducing the influence of a compensator on power line distance protection. The method comprises the steps of acquiring a first current of a circuit connected with a compensator or a series converter in the compensator, and a first voltage of a bus connected with the compensator or a circuit connected with the compensator; when the first current is larger than a preset current threshold value and the duration time is larger than a first preset time threshold value, exiting the series converter and a series transformer; when the first voltage is smaller than or equal to a preset voltage threshold value and the duration time is larger than a second preset time threshold value, setting the voltage of the series converter to be a first preset voltage; when the second current of a element of the first current meets a condition that the first current meets, exiting the series converter and the series transformer; when a second voltage of a line corresponding to the first voltage is larger than the preset voltage threshold value and a fourth time duration is larger than a third preset time threshold value, cancelling the voltage of the series converter to be the first preset voltage and obtaining the first current. The embodiment of the invention discloses a device for reducing the influence of the compensator on power line distance protection.

The invention relates to lubricating oil return devices, in particular to a high-efficiency oil return device used for a compressor oil-mist separator oil sump tank. The high-efficiency oil return device used for the compressor oil-mist separator oil sump tank comprises an oil outlet main pipe, a first branch pipe, a second branch pipe, an oil outlet assistant pipe, a ball valve and an oil pump. One end of the oil outlet main pipe is connected with an oil outlet of the oil sump tank. One end of the first branch pipe and one end of the second branch pipe are connected with the other end of the oil outlet main pipe. The other end of the first branch pipe and the other end of the second branch pipe are connected with one end of the oil outlet assistant pipe. The other end of the oil outlet assistant pipe is connected with an oil return port of a lubricating oil tank. The ball valve is mounted on the first branch pipe and communicates with the first branch pipe. The oil pump is mounted on the second branch pipe and communicates with the second branch pipe. The high-efficiency oil return device has the advantages that the structure is simple, design is reasonable, and the problem that oil does not return smoothly from the oil sump tank to the lubricating oil tank.

The invention discloses a computer display screen regulation device used for software research and development. The device comprises a base, wherein one side of the upper end of the base is provided with a moving plate; one side of the moving plate is provided with a display screen body; the moving plate is connected with the base through a first spindle; the middle position of one side, which isfar away from the display screen body, of the moving plate is provided with a first moving rod; the first moving rod and the moving plate are connected through a second spindle; one end, which is faraway from the moving plate, of the moving rod is connected with one end of a second moving rod; the first moving rod is connected with the second moving rod through a third spindle; a fourth spindle penetrates through one end, which is far away from the third spindle, of the second moving rod; the fourth spindle is far away from one end of the second moving rod, and a motor is arranged on the base; one side of the base is provided with a control switch; and the upper end and the lower end of the display screen body are connected with the moving plate through clips.

The invention provides a battery and a battery pack. The battery comprises a shell, a sampling assembly and a battery cell string, wherein the sampling assembly and the battery cell string are arranged in the shell; the battery cell string comprises a plurality of battery cells which are sequentially connected in series, the sampling assembly comprises a circuit board located at one end of the battery cell string and a sampling wire harness used for sampling the battery cells, the sampling wire harness comprises a fixing part and a plurality of sampling wires, the sampling wires are arranged side by side, and each sampling wire comprises a main body, an output section and a connecting section; the output section and the connecting section are arranged at two opposite ends of the main body, the main body is positioned on one side of the battery cell string, the output section is bent and extends towards the other side of the battery cell string relative to the main body, the fixing part is fixed at the joint of the main body and the output section, the output sections of the plurality of sampling lines are welded and conducted with the circuit board, and the connecting sections of the plurality of sampling lines are correspondingly connected with the plurality of battery cells. The sampling wire harness provided by the invention can be conveniently connected with a circuit board, and is beneficial to improving the assembly efficiency.

The invention discloses a hardware heat dissipation device for computer technology development, and the device includes a housing, an internal upper end of the housing is provided with a fixing plate,the lower end of the fixing plate is provided with a fixing frame, a motor is arranged at the middle position of the upper end of the fixing frame, the lower end of the motor is provided with a firstrotating shaft, and an output shaft of the motor is connected with the first rotating shaft, the lower end of the rotating shaft is provided with a rotating block, a connecting rod is arranged at oneend of the rotating block away from the first rotating shaft, the end of the connecting rod away from the rotating block is provided with a heat dissipation fan, the lower end of the fixing frame isprovided with a movable frame, the two ends of the movable frame are connected with the fixed frame through second rotating shafts, the heat dissipation fan is arranged in the movable frame, the heatdissipation fan is connected with the two sides of the movable frame through a third rotating shaft, a plurality of heat dissipation holes are arranged on the two sides of the lower end of the housing, and a control switch is arranged on one side of the housing.

The invention relates to the technical field of power-assisted manipulators, in particular to a power-assisted manipulator capable of efficiently and automatically driving. The power-assisted manipulator comprises a power-assisted structure, the power-assisted structure is connected with a fixing structure used for fixing a placed object, the fixing structure is provided with a limiting structure, the power-assisted structure is provided with a lubricating structure, the lubricating structure is connected with an air guide structure, the power-assisted structure is provided with a balance weight structure used for balancing the power-assisted structure, and the balance weight structure is connected with a control structure used for controlling the balance weight structure to work. Heavy objects can be hoisted through the power-assisted structure, the heavy objects which need to be transported and are prone to rolling can be fixed through the fixing structure, the working state of the fixing structure can be controlled through the limiting structure, balance of the power-assisted structure can be controlled through the balance weight structure, the size of a force arm can be accurately controlled through the control structure, and the air guide structure facilitates adding lubricating oil to the lubricating structure.