51results about How to "Realize closed-loop automatic control" patented technology

The invention relates to a device for optimized control over carbon source feeding in a denitrification biofilter process. The device is provided with a denitrification biofilter, a carbon source box, a frequency-conversion carbon source pump, a carbon source flowmeter, a backwashing air pump and a backwashing air inlet valve; the denitrification biofilter is internally provided with an online-water-inlet nitrate sensor, an online-water-inlet dissolved oxygen sensor, an online-water-outlet nitrate sensor, a nitrate determinator, a dissolved oxygen determinator, a process controller, and an industrial personal computer; and a water inlet pipeline is provided with a water inlet pump, a water inlet valve and an online-water inlet flowmeter. A method for optimized control cover the carbon source feeding is characterized by comprising the following steps of: (1) introducing water; (2) processing and judging parameters; (3) processing frequency ft by a frequency converter; (4) preventing excessive feeding of a carbon source; (5) stably running; (6) diagnosing faults; and (7) performing backwashing. The device and the method disclosed by the invention can be widely applied to sewage advanced treatment and nitrogenous industrial wastewater treatment, is particularly suitable for producing high-quality recycled water, have the advantages of complete structure, precision for control, good effect and high efficiency.

The invention relates to an indicator diagram-based oil pumping machine regulating and controlling method. The method comprises the following steps: acquiring production parameters of an oil pumping machine well in real time; drawing an indicator diagram of an oil producing well by combining the parameters of the pump hanging, the pump diameter, the stroke, the stroke frequency and the liquid production capacity of an oil well, and calculating the saturation degree of the indicator diagram; performing analysis processing on the data of the indicator diagram and drawing a static load line; solving dynamic fluid level data of the oil well by utilizing dynamic fluid level calculating software; determining the reasonable submergence depth of the oil well according to the dynamic fluid level data of the oil well; performing analysis and calculation on the real-time production parameters of the oil well through a computer to obtain reasonable operating parameters of an oil pumping machine; remotely and intelligently regulating output frequency by utilizing a frequency conversion technology; changing the operating rotating speed of a motor of the oil pumping machine, so that the real-time closed-loop regulation of the working conditions of the oil well is realized. The regulating and controlling method disclosed by the invention is mainly used for optimizing the operating parameters of the oil pumping machine; the operating parameters of the oil pumping machine are regulated in real time; the automatic closed-loop control is realized.

The invention relates to the field of seamless steel tube processing, in particular to a steel tube end part inductive heating device with a temperature detection system, comprising a box body (1), an inductive coil (2), a coil water inlet pipe (3), a coil water outlet pipe (4) and an inductive coil connecting bus bar (5), wherein the box body (1) is provided with a temperature-measuring probe fixing port (6); and a temperature-measuring probe (7) passes through the temperature-measuring probe fixing port (6) and extends into the inductive coil (2). The inductive heating device can be used for detecting the temperature at any time and transmitting a signal to a transmitter through an optical fiber transmitting wire, and ensures that the detected temperature signal is accurate, stable and is not interfered; and the acquired temperature signal curve is smooth, thereby ensuring the stability of the thickening quality of the steel tube and realizing the closed ring automatic control. In addition, according to the invention, the temperature-measuring probe is inserted as required, thereby effectively protecting the optical probe from being irradiated by high temperature for a long term, prolonging the service life and having broad application potentials.

The invention belongs to the technical field of aerospace engine environment simulation, and particularly relates to a heat flow control system and method for a thermal environment simulation test ofan attitude control power system. The technical problems of insufficient continuity and reliability of heat flow density control of a lamp array in the prior art and no early warning or emergency treatment in existing of gear deviation of heat flow measurement in the process are solved. The system is composed of an upper computer, a temperature controller, a silicon controlled rectifier power output device and a temperature/heat flow sensor. The temperature controller collects the heat flow/temperature value of a test piece, compares the heat flow/temperature value with the heat flow value received from the upper computer, controls the output power of the silicon controlled rectifier power output device by adopting a PID control algorithm, and feeds the collected heat flow/temperature value back to the upper computer for data storage and processing. The control method comprises open-loop control and can be switched from closed-loop control to open-loop control when a large deviation occurs in the heat flow value or the output voltage of the silicon controlled rectifier power output device.

The invention provides intelligent water meters adopting IoT (Internet of Things). Each meter is endowed with a unique code, and a central management computer is used for centralized information management through a mobile information communication network, an internet-IoT network and an offline terminal of an intelligent card network; a fee charging state of each water supply unit is generated through mechanical detection and measurement of the meters, fee charging is confirmed through instant communication and data exchange, and then valves are opened for a new round of water supply, and centralized information management control of water supply of disperse water meters is realized; alarm is performed when conditions of the next round of water supply are not met and surplus water is supplied continuously, and then the valves in the water meters are switched off automatically without an instruction or a power supply; measurement data of the water meters is not subjected to A/D (analog/digital) conversion or is controlled to be not subjected to D/A conversion; only one measurement data is provided for management and fee charging, and the requirement for unified measurement specified in the purpose of legislation of the Metrology Law is met; the current serious illegal situations that electronic water meters adopt double measurement, double control and double display of mechanical/electronic water supply data and the whole industry violates the Metrology Law of China on a large scale possibly end.

The invention relates to a washing device for a three-way catalytic converter and an inlet channel of an automobile and a control method. The device comprises a washing agent input pipeline and a washing agent flow control circuit, wherein one end of the pipeline is connected with a washing agent tank, the other end of the pipeline is provided with a vacuum pipeline interface of an engine, and the inside of the pipeline is orderly connected with a vacuum pressure sensor and an electromagnetic flow controller respectively; the circuit is provided with a vacuum pressure measurement interface and an electromagnetic flow control interface; and an interval of a maximum pressure value and a minimum pressure value of vacuum pressure is preset, the electromagnetic flow controller is in a state that the opening flow is 13.5g+/-0.5g/m in the interval, otherwise, the electromagnetic flow controller is in a shutoff state. The device and the method have the advantages that the device and the method can realize the automatic closed-loop control of the inflow amount of a washing agent and the vacuum pressure; the device and the method ensure the washing quality of the three-way catalytic converter and the inlet channel of the engine and avoid the major breakdowns of piston seizure and cylinder plugging of the engine; and the device has a simple structure and extremely convenient operation.

Provided is an internet of things water meter. The water supply measurement function of the water meter belongs to the water meter, and the charge management function belongs to a circuit; a valve which can be automatically switched off without power is installed in a mechanical water meter, an internet of things communication control circuit is overlaid on the mechanical water meter, and a center management computer is used for conducting centralized information management on dispersed water supply through a communication network and an internet of things network; by means of each water supply unit mechanical switch charging status generated through mechanical detection measurement of the water meter, energizing is conduced immediately and instantaneously, and after charging is confirmed through internet of things interactive communication and data exchange, a new round of water supply is conducted; after warning is conducted when the water supply condition is not met and charged water capacity continuous to be completely supplied, the valve in the water meter is automatically switched off without power; management, control and charging all meet the uniform measurement reading conforming to the legislative purpose of the measurement law; internet of things closed-loop payment switching of electronic money and physical commodities is achieved; the major illegal current situations that existing electronic water meters adopt double measurement, double control and double display, and the whole industry violates the national measurement law in a large scale are thoroughly changed.

An internet of things intelligent gas meter is characterized in that a sole code is provided for each gas meter, a center management computer performs integrated information management through a mobile information communication network, an internet of things and an intelligent card network offline terminal, the due charge state of each gas supply unit is measured by mechanical detection of the gas meter, new-round gas supply is performed by opening a valve after instant communication and data exchange charge confirmation, integrated information management control of dispersed gas meter gas supply is achieved, an alarm is given when next-round gas supply conditions are not met, the valve in the gas meter is automatically cut off without instructions or power after residual gas is supplied, measured data of the gas meter are not subjected to A/D (analog to digital) conversion, control is not subjected to D/A (digital to analog) conversion, management and charge only have one type of measured data meeting unified measurement requirements of metrological law legislation objectives, and the major law violation status quo of industry-wide large-scale national metrological law violation of electronic gas meters using mechanical/electronic gas supply data for double measurement, double control and double display is possibly finished.

The invention discloses an automatic control method for a wet-type electric dust remover of a thermal power generating unit, and the method comprises the following steps: obtaining a dynamic characteristic model through a disturbance test of a wet-type electric dust remover; respectively reading the operation parameters of the unit, the operation parameters of the wet-type electric dust remover and the operation parameters of the pre-stage dry electric dust remover; according to the operation parameters of the dry-type electric dust remover and the operation parameters of the wet-type electric dust remover, calculating a feedforward adjusting instruction for adjusting a secondary current and/or secondary voltage; according to the operation parameters of the unit and the operation parameters of the wet-type electric dust remover, sending out a feedback regulation instruction of secondary current and/or secondary voltage; and according to the feedforward regulation instruction and the feedback regulation instruction, regulating secondary current and/or secondary voltage to realize closed-loop automatic control of the wet-type electric dust remover. The automatic control method has better anti-interference capability and energy-saving effect, and can realize closed-loop automatic control of the wet-type electric dust remover.

The invention discloses a smart card gas meter. The gas supply metering function is achieved by a gas meter, and the charging management function is achieved by a circuit. A valve capable of being automatically switched off without power is installed in the mechanical gas meter, and the code type smart card circuit is superposed on the mechanical gas meter. In the gas supply process, the mechanical switch charging state per metered gas supply unit is mechanically detected through the gas meter, instantaneous electrification is carried out, and after charging is confirmed through smart card interactive communication and data exchange, a new round of gas supply is carried out; when conditions of a new round of gas supply are not met, after a charged quantity of gas supply is completed, the valve in the gas meter is automatically switched off without a power supply. Uniform metering readings conforming to the purpose of legislation of the metrological law are available for management, control and charging; tiered gas pricing can be conveniently carried out; closed-loop payment exchange between electronic currency and physical goods is achieved; the serious illegal status that the entire industry violates the national metrological law on a large scale in mechanical/electronic dual metering, dual control and dual display brought by a traditional non-electricity measurement technology to existing smart card gas meters is thoroughly eliminated.

The invention discloses a temperature control method for a preheating type anti-freezing system of a wet cooling tower. The temperature control method is used for controlling an air inlet shutter typeair door and a water inlet regulating valve of a preheater of the preheating type anti-freezing system and ensuring that the temperature of cooling water drained out of the tower is the lowest on thepremise of freezing prevention of the cooling tower. The control system comprises a shutter type adjusting air door, an air door executing mechanism, a water inlet adjusting valve, a valve executingmechanism, a PLC, an environment temperature sensor, a tower inlet and outlet water temperature sensor, a preheating air temperature sensor, an outlet water temperature sensor and an air preheater. The temperature control comprises combined control over the preheating air temperature, the preheater water outlet temperature and the cooling tower water outlet temperature, and the control process iscontinuous temperature control based on meteorological condition changes and unit load changes. According to the temperature control method, the operation states of the preheater and the cooling towercan be effectively monitored, and the closed-loop automatic control of the preheating air temperature and the tower outlet water temperature can be realized.

The invention provides a visual simulation test system for gas-liquid two-phase countercurrent in an abandoned mine goaf, and belongs to the technical field of abandoned mine goaf simulation test systems. The visual simulation test system comprises a simulation device for simulating a fracture network of the abandoned mine goaf, a gas supply system and an automatic water pressure controlling system, wherein the simulation device comprises a transparent observation box and a rock material arranged in the observation box; the gas supply system comprises a gas supply pipe and a gas cylinder for supplying gas to the gas supply pipe; the automatic water pressure controlling system comprises a pressure stabilizing tank, a pressure sensor, a pressure regulating gas cylinder, a water supply tank,a pressure test water pump, a water supply pipe and an electronic controller. The system can be used to simulate the gas-liquid two-phase countercurrent in the fracture network of the abandoned mine goaf, and realize the test of countercurrent visualization to reveal evolution of accumulated water and enrichment of gas in a closed-pit mine during long-term abandonment.