34results about How to "Control normal operation" patented technology

The invention provides a control method for an air-conditioner, a control device for the air-conditioner and an air-conditioner. The method comprises the steps that after the air-conditioner receives a starting-up instruction, whether an indoor temperature detecting device of the air-conditioner works normally is judged; when it is judged that the indoor temperature detecting device does not work normally, first indoor heat exchanger coiler temperature, measured when the air-conditioner does not operate, of the air-conditioner is obtained, and the corrected first indoor heat exchanger coiler temperature serves as current first indoor temperature of the air-conditioner; when the air-conditioner receives an operation mode instruction, according to target indoor temperature included by the operation mode instruction and the current first indoor temperature, the air-conditioner is controlled to enter an operation mode corresponding to the operation mode instruction or stop operation. By means of the technical scheme, when an indoor temperature sensor of the air-conditioner is disconnected or breaks down, it can be ensured that on the basis of not increasing the cost of the air-conditioner, the operating state of the air-conditioner can still be controlled accurately so as to control normal operation of the air-conditioner.

The invention discloses a management and communication controller of an AC drive system, comprising a microprocessor, a memory and a power circuit and a reset circuit, wherein the memory is connected with the microprocessor, the microprocessor is provided with an ethernet interface, an RS485bus interface, a universal synchronous/asynchronous serial transceiver interface and an external bus extended interface; the controller further comprises a programmable logic device which is connected with the microprocessor and is used for controlling address decoding and data flow direction of an analog-digital conversion unit, a digital-analog conversion unit and a multifunction vehicle bus interface unit which are connected to the programmable logic device; the analog-digital conversion unit converts a received analog signal into a digital signal and sends to the microprocessor, the microprocessor transfers a control instruction to the digital-analog conversion unit which converts the control instruction into an analog signal and transfers to a the control device of a train; the multifunction vehicle bus interface is used for communicating with a communication network of the train. The controller has the advantages of compatibility with the prior products, quick processing speed and rich resources of communication interfaces.

The invention discloses a device and a method for the implementation of AVS video decoding by using SOPC, belonging to the field of video decoding. The device comprises an Nios II microprocessor module and other modules. The Nios II microprocessor module is connected with a DMA controller module and other modules; a SDRAM controller module is connected with the DMA controller module and other modules as well as SDRAM; a video output controller module is connected with the SDRAM controller module and a video output module; the DMA controller module is connected with an AVS co-processing module. The Nios II microprocessor module executes software decoding control, the AVS co-processing module executes AVS hardware decoding, other modules executes auxiliary decoding, and all the modules are hung on a bus and packaged in FPGA for data interaction. The device is reasonable in software/hardware division, capable of varying software decoding procedures by modularized design and of supporting the design with other standards by hanging other co-processor cores, and has high expandability, universality and flexibility.

The invention provides an operation method for controlling the reliability of an air conditioner, a control system and the air conditioner. The operation method for controlling the reliability of theair conditioner comprises the following steps that whether a temperature sensor fails or not is judged according to a temperature signal sent by the temperature sensor, if the temperature sensor fails, the air conditioner continues to acquire real-time outdoor environment temperature, the air conditioner automatically matches each operation parameter of the system corresponding to the outdoor temperature according to the real-time outdoor temperature, and continues to operate according to each operation parameter of the system after automatic matching; and otherwise, normal mode operation is continued. The operation method for controlling the reliability of the air conditioner can continuously control normal operation of the air conditioner after the temperature sensor fails, so that the normal use of people is met.

The invention discloses a fuel cell power system test platform test method and device. The method comprises steps of extracting electric energy consumption data of a hydrogen fuel cell vehicle runningfor a long time under an actual road condition, and building an electric energy consumption data model according to an existing test model; carrying out data fitting of the electric energy consumption data and the electric energy consumption data model to obtain equal-proportion test duration required by a hydrogen fuel cell vehicle under each test model; building a power system test platform device and the like based on the hydrogen fuel cell electric-electric hybrid power system. The method is advantaged in that a whole vehicle power system platform is built in a laboratory environment as much as possible to simulate a real vehicle use environment, statistics of system energy consumption conditions under different energy distribution strategies tested under a test model is performed, anequivalent minimum power consumption control scheme is obtained, so an optimal energy distribution strategy and an optimal control strategy are screened in the laboratory environment.

The invention relates to the technical field of concrete delivery pumps, in particular to a hydraulic concrete delivery pump, which comprises a rack and a hood as well as an electric control box, wherein support legs are fixedly arranged at the bottom of the rack, and a carrying wheel is arranged at the center of the bottom of the rack; a supporting wheel is fixedly arranged at the right side of the bottom of the rack, and a traction rack is fixedly arranged at the right side of the rack; an anti-overflow hopper is fixedly arranged at the left side of the rack, and a washing tank is fixedly arranged at the bottom of the rack; the left side of the washing tank is connected with a pumping mechanism, and the other end of the pumping mechanism is fixedly connected with the anti-overflow hopper; a stirring mechanism is arranged at both sides of the anti-overflow hopper, and a discharge pipe is arranged at the left side of the anti-overflow hopper; the hood is fixedly arranged at the top ofthe rack, and the right side, close to the anti-overflow hopper, of the hood is provided with a steel swinging mechanism. The overall device has high delivery efficiency and intelligent control, higher stability and practicability and certain promotion value.

The invention provides a low-pressure protection control method and device and an air conditioner, and relates to the technical field of air conditioners. The low-pressure protection control method comprises the steps that a return air temperature value, an evaporator outlet temperature value, an oil temperature value and a coil pipe temperature value are received; and according to the return air temperature value, the evaporator outlet temperature value, the oil temperature value and the coil pipe temperature value, a low-pressure protection instruction or a normal operation instruction is sent out so as to control frequency reduction or shutdown of a compressor of the air conditioner or control normal operation of the compressor. The invention further provides the low-pressure protection control device and the air conditioner. The low-pressure protection control method can be executed by the low-pressure protection control device and the air conditioner. According to the low-pressure protection control method and device and the air conditioner, the problem that the service life of the compressor is shortened due to frequent start-stop or fluctuation of the compressor can be solved.

The invention discloses a method for quickly detecting starch coated amount in a calcium carbonate filler modified by the starch through a headspace gas chromatography. The method comprises the steps of weighing a certain amount of a calcium carbonate filler sample modified by the starch, grinding the filler sample by using a mortar, and then generating carbon dioxide by using the modified calcium carbonate filler sample which is acidized and ground by using sulfuric acid, then detecting the content of gas phase carbon dioxide by using a headspace gas chromatography, and calculating the content of calcium carbonate in the modified calcium carbonate filler according to the content of the carbon dioxide. A total mass of the modified calcium carbonate filler sample is deducted by the mass of the calcium carbonate to obtain mass of the starch coating the surface of the calcium carbonate filler. The method is quick, accurate, good in reproducibility and easy to operate. The detection method is applied to a preparation process of the modified calcium carbonate filler in a papermaking enterprise; the detection method is capable of effectively monitoring loss amount of the starch in the preparation process of the modified calcium carbonate filler and a modification effect of the calcium carbonate filler and ensuring quality of the modified calcium carbonate filler, normal operation of a papermaking machine and stability of quality of final products.

The invention discloses an air compressor control system, and belongs to the technical field of electric appliance control. The air compressor control system comprises a main circuit part provided with a main motor and an exhaust motor and a control circuit part. A programmable controller is connected to the control circuit part through a backboard, and comprises a digital quantity input module, a digital quantity output module, an analog quantity input module and a control network adapter; the control network adapter is connected with an upper PC through a PLC. The air compressor control system can solve the problems that an air compressor is high in fault rate, and a control system can not adjust the air compressor along with operation conditions of the air compressor at the right moment and can not control production remotely.

The invention relates to the technical field of machining tools, in particular to a stator cooling and setting device for machining. The device comprises a machine base, a control cabinet and a main box body, wherein the bottom of the machine base is fixedly provided with supporting legs, the bottoms of the supporting legs are fixedly provided with universal wheels, and the control cabinet and themain box body are fixedly arranged on the top of the machine base from left to right. A control panel is embedded into the upper side of the base plane of the control cabinet, heat dissipation holesare formed in the lower side of the base plane of the control cabinet, a storage battery is fixedly installed in the control cabinet, a cold air blower is fixedly installed on the side, close to the storage battery, in the control cabinet, a cabinet door is installed on the base plane of the main box body, an observation window is formed in the base plane of the cabinet door, a handle is fixedly installed on the base plane of the cabinet door, and an air outlet plate is embedded into the inner wall of the main box body. The whole device is simple in structure, the cooling and setting effect isgood, the working efficiency is greatly improved, the stability and the practicability are high, and the device has certain application values.

The invention provides a pH detection control system of a brackish water desalination device. The system comprises an operational amplifier UA, an operational amplifier UB, an operational amplifier UC, an operational amplifier UD, a photoelectric coupler IC1, a photoelectric coupler IC2 and resistors and capacitors which are connected by wires; and the in-phase input end of the operational amplifier UA is connected with the resistor R2, the capacitor C2 and the resistor R1 in sequence, that is to say, one end of the resistor R2 is connected with the in-phase input end of the operational amplifier UA, the other end of the resistor R2 is connected with the capacitor C2, and the other end of the capacitor C2 is connected with one end of the resistor R1. The inventive system can perform real-time detection of water produced from desalination of the device, can effectively control normal operation of the water desalination device through adjust and control via circuits, save manpower and reduce labor intensity, and has no need of 24-hour artificial guarding; and the circuit is good in voltage and current stabilizing effect, can resist impulse voltage and current of +/-200%, the regulation accuracy is high, and the pH value accuracy can be adjusted to 0.01.

The invention provides a vehicle motor control method and device, and the method comprises a normal operation control step: controlling the normal operation of a motor; a latching step: latching a safety state control signal according to the parameters in the normal operation process of the motor; and a safety control step: when the motor has a control fault, the motor is controlled to enter a safety state by using a latched safety state control signal, and the safety state comprises an ASC safety state under high-speed operation of the motor and an SPO safety state under low-speed operation of the motor. Due to the fact that the latching step and the safety control step are matched, the safety state control signal is latched according to the parameters in the normal operation process of the motor, the motor is controlled to enter the safety state through the latched safety state control signal when the motor has a control fault, and the safety control effect is good.

The invention relates to a feed automatic truck loading crane. The feed automatic truck loading crane comprises a frame body and a control box; a cross beam is mounted at the upper end of the frame body; a movable rail is arranged on the lower side of the cross beam, and is provided with a movable lifting rod; the upper end of the movable lifting rod is connected with an output end of a first motor; a lifter is arranged at the lower end of the movable lifting rod; the lifter comprises two clamping jaws arranged in parallel; a camera is arranged on the cross beam; movable wheels are arranged atthe bottom end of the frame body, and are connected with an output end of a second motor; walking rails are correspondingly arranged at the bottoms of the movable wheels; the control box comprises acentral control layer and a special control layer; the special control layer comprises a motion control system, a frame body control subsystem and an ultrasonic distance measuring subsystem; the central control layer is connected with a human-computer interaction layer; the human-computer interaction layer is connected with a signal acquiring layer; and the signal acquiring layer is connected withthe camera. The feed automatic truck loading crane has the advantages of simple structure, high intelligence degree, application to different types of trucks, time and power saving, long service lifeand convenience to use.

The invention discloses a chip-driven compensation type industrial water supply pipeline intelligent supercharging system, comprising a control chip U1, a capacitor C3, a capacitor C4, a booster pump drive circuit connected to the control chip U1, and a power supply connected to the control chip U1 The input circuit is a signal processing input circuit connected to the control chip U1 and the power input circuit at the same time, and a chip drive compensation circuit connected to the control chip U1 and the power input circuit at the same time. The present invention provides a chip-driven compensation type intelligent pressurization system for industrial water supply pipelines, which can quickly respond to insufficient water pressure, achieve real-time pressurization, and greatly reduce the impact of insufficient water pressure on the normal production of enterprises. coming impact.

The invention discloses a multi-motor connection system and a current hysteresis control method, and the method comprises the steps: obtaining four current values through four PI regulators accordingto the difference between a given reference rotating speed and an actual rotating speed; enabling the four current values to pass through a reference current reconstruction module to obtain a requiredreference current value; enabling the current value of the output end of the inverter to pass through a current reconstruction module to obtain a calculated current value; giving the difference valuebetween the calculated current value and the reference current value to a hysteresis comparator, and generating square wave signals with equal amplitude and unequal width; converting the square wavesignal into a switching signal for driving an IGBT through a PWM module; transmitting PWM signals to s five-phase voltage source type inverter module, enabling the five-phase voltage source type inverter module to control the four-direct-current motor to work normally, and achieving four-quadrant operation of the motor. The invention provides a novel four-direct-current motor parallel control method by adopting a reference current reconstruction technology, a current reconstruction technology and a hysteresis comparison technology.

The invention discloses a hydraulic control device of a road guardrail breakdown van, and belongs to road guardrail breakdown van. The hydraulic control device comprises a swivel joint, an operation controller, a drilling controller, a supporting leg controller and an oil pump assembly; the oil pump assembly outputs to the supporting leg controller, and the supporting leg controller outputs to the swivel joint and outputs to the operation controller and the drilling controller; and a pile driver is driven and controlled to work. The hydraulic control device has the advantages that the structure is simple, the size is small, one hydraulic controller can control hydraulic components of the whole vehicle, normal operation of road repair is effectively controlled and driven, control is convenient, particularly, one hydraulic controller comprises a piling hydraulic control device and a drilling machine hydraulic control device, multiple functions of piling, pile pulling and drilling can be achieved through one device, and the labor intensity of workers is greatly reduced.