35results about How to "The control method is easy to implement" patented technology

The invention provides an aerial photography collection unmanned aerial vehicle for law enforcement of police fire protection and a control method thereof. The unmanned aerial vehicle comprises four groups of propeller actuating arm components, a square frame component, a camera component, a battery box and a support plate component. The four groups of propeller actuating arm components are fixed to the four ends of the square frame component. The battery box is fixed to the square frame component which is fixed to one side of the support plate component. The camera component is fixed to the other side of the support plate component. A battery in the battery box is electrically connected with the camera component. Through wireless communication connection, a control terminal controls the propeller actuating arm components to provide ascending power and drive the square frame component, the camera component, the battery box and the support plate component to leave the ground and ascend to appointed places for shooting recording of the camera. The unmanned aerial vehicle has the advantages of excellent maneuvering property, low demand for take-off and landing conditions and great cruising ability and is suitable for demanding flight missions in the process of law enforcement of police fire protection.

The invention provides a ghost probe traffic accident early warning system and -method. The early warning system mainly comprises a monitoring module and a prevention module. The monitoring module andthe prevention module transmit data through a CAN bus module. The monitoring module is used for real-time monitoring whether there are objects in the preset distance range in the front and rear of the current vehicle, and measuring the distance data and the speed data between the object behind the current vehicle and the rear end of the current vehicle, and then transmitting the information to the prevention module;. According to the received information, the prevention module controls the character display unit, the voice playing unit and the prompt light unit to work, to alarm and remind, thereby reducing the occurrence of the ghost probe traffic accident, and improving the safety of the road traffic.

The invention provides a control system and a control method for asymmetric secondary side current of a buck-boost resonant converter, which belong to the technical field of resonant converter control. The control system comprises a first current sampling circuit, a second current sampling circuit, a control circuit taking an MCU as a core, and an isolation driving circuit. Under the condition ofprimary side current distortion, after sampling of a plurality of working periods, a difference value between current peak value average values of an upper half period and a lower half period of a secondary side rectification network of the converter is obtained, logic comparison is carried out on the difference value and a set value, and secondary side current of the converter is enabled to be symmetrical by adjusting conduction time of a preceding-stage power tube of a primary side of the converter. The control system is simple in structure and the control method is easy to implement. The secondary side current of the transformer is symmetrical, the heat loss is reduced, and the efficiency is improved.

The present invention relates to a chain type converter-based power distribution network electric energy quality comprehensive control method and system. The method includes a system-level control strategy and a device-level control strategy, wherein the system-level control strategy realizes load reactive power, harmonic and unbalanced current detection, power distribution network PCC fundamental wave positive sequence voltage control, and power distribution network PCC fundamental wave negative sequence voltage control, and comprehensively generates chain type converter current control instruction signals, and the device-level control strategy realizes sub-module direct-current side capacitor voltage control of chain type converter control, realizes three-phase conversion chain current control of a chain type converter according to a current control instruction from the system level, and generates chain type converter switching tube duty cycle signals. With the method and system provided by the technical scheme provided by the invention adopted, electric energy quality problems such as harmonic, flicker and imbalance in a power distribution network can be comprehensively controlled.

The invention discloses an indoor device for automatically receiving packages. The indoor device comprises an entry door and a controller MCU; a putting opening is formed in the middle of the entry door, and the entry door is provided with a baffle used for opening or closing the putting opening; the baffle is driven by a linear motor, and a wall on the upper part of the entry door is fixedly connected with a rotating motor which is used for driving a lifting rope; the tail end of the lifting rope is connected with a hanging basket, and the side, close to the entry door, below the bottom of the hanging basket is provided with a downward-extending balancing rod; an upper position sensor used for detecting the upper limit position of the hanging basket is arranged on the wall on the upper part of the entry door, and a middle position sensor used for detecting the time when the hanging basket is located in the putting opening and a lower position sensor used for detecting the time when the hanging basket is located on the near-ground position are arranged on the entry door; and the controller MCU is connected with the linear motor, the rotating motor, the upper position sensor, the middle position sensor and the lower position sensor. The indoor device can automatically receive the packages when no person in a room, and is simple in structure and easy to realize.

The invention discloses a TCR type SVC voltage control method used in a transformer substation. The method comprises the following steps: the control objective fixed value as well as the adjusting dead area of 220 / 500 kV voltage and the limit value as well as the TCR power output upper and lower limit values of 10 / 35 kV voltage are set respectively; the 220 / 500 kV voltage and the 10 / 35 kV voltageare measured and judged; aiming at the different 220 / 500 kV and 10 / 35 kV voltages, different TCRs as well as the adjusting order and the adjusting method of a capacitive compensating branch are adopted. The method can effectively integrates the level of the 10 / 35 kV voltage while controlling the 220 / 500 kV voltage of the transformer substation, thereby avoiding the frequent switch of the capacitive compensating branch, considering the demands of various complicated working conditions, and having wider applicability; at the same time, a self-regulating factor fuzzy controller is adopted to control the TCR output, and an error weighting coefficient which automatically adjusts according to the error magnitude is introduced to satisfy the demands of different control stages, thereby improvingthe whole control effect.

The invention provides an aerial photography collection unmanned aerial vehicle for law enforcement of police fire protection and a control method thereof. The unmanned aerial vehicle comprises four groups of propeller actuating arm components, a square frame component, a camera component, a battery box and a support plate component. The four groups of propeller actuating arm components are fixed to the four ends of the square frame component. The battery box is fixed to the square frame component which is fixed to one side of the support plate component. The camera component is fixed to the other side of the support plate component. A battery in the battery box is electrically connected with the camera component. Through wireless communication connection, a control terminal controls the propeller actuating arm components to provide ascending power and drive the square frame component, the camera component, the battery box and the support plate component to leave the ground and ascend to appointed places for shooting recording of the camera. The unmanned aerial vehicle has the advantages of excellent maneuvering property, low demand for take-off and landing conditions and great cruising ability and is suitable for demanding flight missions in the process of law enforcement of police fire protection.

The invention relates to a uniform spreading control method for a roundtrip feed distribution travelling crane. The uniform spreading control method comprises the following steps of setting the rangeof the belt motor frequency F<belt> and the walking motor frequency F<walking motor> to be 20-50 HZ; according to the formula relation between the walking speed V<walking motor> and the walking motorfrequency F<walking motor> and frequency that V<walking motor> is equal to K1*F<walking motor> and V<belt> is equal to K2*F<belt>, obtaining K1 and K2 on average; setting the flow of a product A as QAand the walking motor frequency as F<walking motor A>, wherein when the motion directions are the same, V total=K1*F<walking motor A>+K2*F<belt A same>, when the motion directions are opposite, the Vtotal is equal to K2*F<belt A opposite>-K1*F<walking motor A>, and F<belt A same> and F< belt A opposite> are obtained; and setting the flow of a product B as QB, obtaining F<walking motor B> according to the formula that F<walking motor B> is equal to F<walking motor A>*QB / QA, and further obtaining F< belt B same> and F< belt B opposite>. The method can solve the problem of inconsistent speed ofmaterials relative to a discharging port in the roundtrip process of the distribution travelling crane, and improves the uniformity of material laying.

The invention discloses an engine igniter start interlocking control system and a control method thereof. The system comprises a storage battery, an inverter and a starting motor which are mutually electrically connected, and an MCU used for controlling starting. The starting motor is a sensorless permanent-magnet synchronous motor. A first electronic switch is connected between the storage battery and the inverter, and / or second electronic switches are connected between the inverter and the starting motor. The voltage output end of the starting motor is connected to an igniter start interlocking device. The igniter start interlocking device outputs a start state signal of the starting motor, and it is judged that whether the first electronic switch and / or the second electronic switches are / is controlled to be turned off or not according to the start state signal. According to the engine igniter start interlocking control system and the control method thereof, the state of an engine atthe time of ignition starting can be accurately judged, accordingly, an ignition interlocking function of the engine is reliably achieved according to the state of the engine, the control system provided by the invention is simple, the control method is easy to achieve, and in addition, the safety and reliability of the igniter controller at the time of starting of the engine can be effectively guaranteed.

The invention relates to a method and device for laser shot-blasting forming of an aircraft wing. The device for laser shot-blasting forming of the aircraft wing is composed of a two-axis rotating workbench, a laser device, a lens assembly, a control device, a big data analysis system and the like. The control device plans position information of laser shock according to information of the big data analysis system and controls the two-axis rotating workbench to rotate according to the position information, so that the wing is rotated to the shock position, and the lens assembly is controlled to move to the shock position at the same time. The lens assembly measures the distance between the shock position and a lens and moves the focusing lens to focus lasers to the shock position, and the required spot diameter is obtained. After the lens assembly is positioned, a signal is emitted to a control system, the control system controls the laser device to emit lasers according to planned laser shock parameters, shock waves generated by the lasers are used for making a workpiece deform, and thus forming is achieved.

The invention discloses a floating valve control method for a vertical evaporative humidifier for preventing water leakage, and belongs to an internal control method of an evaporative humidifier. The floating valve control method comprises the following steps that a sensor module correspondingly evaporates water level values in a water tank and transmits the water level values to a main control module; the main control module compares the current water level value with a preset threshold value and judges whether the current water level value is larger than the preset threshold value or not; if yes, the output end of a driving motor jacks up a valve rod, the floater end of a floating valve is limited by the valve rod, the floater end cannot fall at the moment, and a sealing plug at the adjusting end of the floating valve is kept sealed at the water outlet of a water storage tank; otherwise, the current state is kept. Free swing of the floating valve is affected by deposited dirt at the bottom of the evaporation water tank, so that when the water level value is larger than the preset highest water level value, the floater end of the floating valve leaves the bottom of the evaporation water tank forcibly through jacking of the valve rod, water leakage caused by overflow due to the fact that the water level in the evaporation water tank is too high is avoided, and when the water level is lower than the preset threshold value, the floating valve returns to a normal state.

The urea hydrolysis reactor control method based on the heat feed-forward signal of the present invention comprises the following steps: 1) Obtain the transfer function from the load of the hydrolysis reactor to the amount of heating steam; 2) Generate a path of heating steam through the transfer function according to the load instruction of the hydrolysis reactor The amount signal is converted into the corresponding first heating steam door opening signal; 3) The second heating steam door opening signal is generated by the pressure deviation signal of the hydrolysis reactor through the door opening control function to obtain the deviation value; 4) The first heating steam regulating door opening signal is introduced into the heating steam regulating door opening automatic control logic as a feed-forward signal to determine the opening reference value; 5) The heating steam regulating door opening reference value and deviation value are weighted and output to obtain variable load Heating steam door opening signal under working conditions. The control system of the present invention includes a PLC controller for receiving the load instruction of the hydrolysis reactor, the pressure setting value and the measurement signal of the hydrolysis reactor.

The invention discloses a power output control method and system of a fuel cell power generation array system. By collecting the output voltage and inductance current signals of each DC / DC circuit in each fuel cell system, the low-frequency ripple control is stabilized to obtain the switch on time and off time. Off time, and then generate switch control signal to control the DC / DC converter; the control system includes a data acquisition module, an outer ring voltage control module, a slope calculation module, a switch control module and a modulation and demodulation module; first calculate the inductor current in the switch Slope conversion under control to obtain the duty cycle, the modulation and demodulation module controls the switching signal to control the DC / DC converter, and the performance of the DC / DC converter is improved by stabilizing low-frequency ripple control, and the multi-stack fuel cells pass through The parallel topology and the control of the average current realize the power output of each stack in the fuel cell array according to the required power.

The invention discloses a plate chain control method for an automatic storage battery plate wrapping machine. In the prior art, electrode plates conveyed by a plate chain are easy to fall over and excessively slide when conveying efficiency of the plate chain is pursued. The control method includes that the plate chain is rotated continuously in a debugging mode, and the value of Y is measured by a stop lever signal D; according to default initial values of parameters of rho,P0, P1, P2, K1 and K2, the plate chain is rotated in a debugging mode and in a step-by-step manner and operation effect of the plate chain is observed; according to falling and sliding conditions of the electrode plates during acceleration and deceleration of the plate chain, the parameters of the rho, the P0, the P1, the P2, the K1 and the K2 are adjusted manually; when the electrode plates do not fall over and sliding amplitude is small during acceleration and deceleration of the plate chain, adjustment of control parameters is completed. The parameters are stored automatically when the debugging module ends up, and the speed of the plate chain is controlled according to adjusted control parameters in a normal operation mode. The control method can be applied to the majority of specifications of stepping motors and electrode plates, and application debugging of the control method is simple and efficient.

The invention discloses an indoor device for automatically receiving packages. The indoor device comprises an entry door and a controller MCU; a putting opening is formed in the middle of the entry door, and the entry door is provided with a baffle used for opening or closing the putting opening; the baffle is driven by a linear motor, and a wall on the upper part of the entry door is fixedly connected with a rotating motor which is used for driving a lifting rope; the tail end of the lifting rope is connected with a hanging basket, and the side, close to the entry door, below the bottom of the hanging basket is provided with a downward-extending balancing rod; an upper position sensor used for detecting the upper limit position of the hanging basket is arranged on the wall on the upper part of the entry door, and a middle position sensor used for detecting the time when the hanging basket is located in the putting opening and a lower position sensor used for detecting the time when the hanging basket is located on the near-ground position are arranged on the entry door; and the controller MCU is connected with the linear motor, the rotating motor, the upper position sensor, the middle position sensor and the lower position sensor. The indoor device can automatically receive the packages when no person in a room, and is simple in structure and easy to realize.

The invention discloses a continuously variable transmission (CVT) method and device for static fluid, belonging to the technical field of fluid transmission and control. The device comprises more than two variable units, wherein each variable unit comprises a variable element and a rectifying device; the variable units are connected in series by oil pipelines to form a closed loop; due to the continuity of oils in the closed loop, the revolving speed relationship of the variable elements is determined on displacement relationships among the variable elements; and the variable elements which are taken as joints of a passive robot, and accurate control is carried out on the displacement of each variable element to acquire a relationship of transmission ratio of each joint, thus providing incomplete virtual constraint for end movement of the passive robot. Hydraulic transmission is used in the invention, thus mechanical clearness does not occur, and the oils can exert buffer action in actual working conditions. The displacement relationships among the variable elements are changed so as to realize the CVT; and the device has simple structure and the control method is easy to implement.