59results about How to "Control science" patented technology

The invention discloses a method for controlling roof caving under a condition of hardroof in coal mining, belongs to the technical field of coal mining and particularly relates to a quantitative method for controlling roof caving under the condition of hardroof in coal mining. The invention adopts a technical scheme that the method mainly comprises a method for determining a trough pull position, trough pull depth and explosion work amount for initial roof caving under the condition of hardroof and a method for determining the reasonable length of a hanging arch for periodical roof caving under the condition of hardroof. In the invention, the roof caving mode is controlled to reduce the pace of initial top coal collapsing of a working face, the through pull depth and the explosion work amount are the smallest in all hardroof control modes and the operation is easy; the relationship between the pace of initial top coal collapsing and the trough pull depth is specified quantitatively; based on the design working resistance of a bracket of the working face, the method for determining the reasonable length of the hanging arch of a hardroof rock beam is obtained, so the hardroof control is more scientific, quantitative, accurate and simple; and the method can be widely used in control of roof caving under the condition of hardroof in various kinds of coal mining.

The invention discloses a method for hard roof advanced precracking control caving in a coal mine stope, and belongs to the technical field of coal mining, and particularly relates to a hard roof advanced precracking control caving method for determining parameters of borehole layout, such as, the pore opening positions, the depth of drilling holes, the angle of the drilling holes and numbers of the drilling holes of hard roof advanced precracking drilling in the coal mine stope and calculating the explosive payload of the drilling holes. According to the characteristics of hard roof fracture,five blast holes in a fan shape are formed to form a fixed angle; the middle portion and the end of the a working face which are most difficult to break of the hard roof can be effectively pre-cracked, so that the roof can collapse as required; based on the characteristics of blasting, the blasting sequence of the blast holes from the middle portion of a cutting hole to both ends can maximize thefree surface of the blasting and reduce the explosive payload, and the operation is convenient; and a calculation formula of the explosive payload of the hard roof of preceding loosening blasting indeep hole is given quantitatively to enable the control of hard roof to be more scientific, quantitative, accurate and simple.

The present invention relates to fingerprint establishing method and standard fingerprint of angelica and Chuanxiong rhizome and their compound preparation. The standard fingerprint establishing method includes: extracting angelica and/or Chuanxiong rhizome with methanol or anhydrous ethanol, dissolving or diluting to proper concentration, high efficiency liquid chromatography detection, recording chromatogram map, and calculating relative retention time and relative peak area of the fingerprint peaks by referring to chromatograph peaks of ligustilide to establish the standard fingerprint. The present invention has the advantages of simultaneous measurement of two effective parts including water soluble and volatile oil in angelica and Chuanxiong rhizome and their compound preparation, and being scientific, simple, stable, accurate and high in repeatability.

The invention discloses an automatic irrigation system for farmland, comprising: an on-site monitoring subsystem for collecting farmland soil moisture data, soil nutrient data and weather data and uploading them in real time; an irrigation subsystem for detecting the drought degree of farmland crops and implementing Soil water and fertilizer irrigation; the central monitoring subsystem is used to analyze the data uploaded by the on-site monitoring subsystem and control the irrigation subsystem to perform farmland soil water and fertilizer irrigation. The invention integrates automatic irrigation and manual irrigation control, comprehensively considers the environmental state of crops, can realize accurate collection of crop water and fertilizer irrigation requirements and intelligent irrigation of water and fertilizer, introduces an acceptance mechanism, scientifically controls irrigation methods and irrigation volume, and improves Improve the intelligent management level of irrigation, strong operability of on-site irrigation, high irrigation efficiency, water saving and fertilizer saving.

The novel aqueous humor drainage device for glaucoma consists of T-shaped pipe and draining disc connected together. The T-shaped pipe has an elastic transverse pipe with many homogeneously distributed humor inflowing holes in the aqueous humor contacting surface and a vertical pipe communicated perpendicularly with the transverse pipe and with back pressure controlling system. The draining disc has groove in the front part for the pressure controlling system, humor storing area in the back part, humor flow holes in the bottom and ridges in the center and the edge. The pressure controlling system is constituted in the extending part of the T-shaped pipe and inside the grooves of the draining disc. The aqueous humor drainage device makes the explant attached to the eyeball closely, has expanded filtering volume to reduce the stimulation to eyeball and peripheral tissue. It has good implanting operation performance, and can lower eye pressure and control eye pressure in normal range.

The invention discloses a wireless communication method, slave, host and system applicable to radio frequency and a readable memory medium. The wireless communication method comprises the following steps that the slave receives a data link layer protocol frame sent by the host based on the radio frequency, analyzes the protocol frame according to a preset protocol format and obtains frame data codes in the protocol frame, wherein the frame data codes comprise data type codes and action codes; an attribute of the data type codes is identified, and if the attribute of the data type codes is a query type, the slave obtains state data corresponding to the data type codes and packages the state data into the action codes of the protocol frame; and the slave feeds back the protocol frame into which the state data is packaged to the host based on the radio frequency. The wireless communication method provided by the invention is applicable to an RF wireless communication technology; the host can actively set a state of a terminal device and obtain data such as state information of the terminal device, so that two-way communication is realized; and a user can control the terminal device in real time and obtain the state of the terminal device timely.

The invention relates to an air conditioning system control device based on a pressure sensor. The air conditioning system control device comprises an air conditioning system controller, the air conditioning system controller is connected with a solar radiation sensor, an outdoor temperature sensor, an outdoor humidity sensor, an indoor temperature sensor, an indoor humidity sensor, a pressure sensing ground mat and a plurality of air conditioning air supply tail ends, the air conditioning air supply tail ends are connected with an air conditioning fan three-speed controller and an air conditioning water system electric valve, and the air conditioning fan three-speed controller and the air conditioning water system electric valve are connected with the air conditioning system controller. The air conditioning system control device based on the pressure sensor has the advantages of being high in intelligent degree, wide in applicability, good in energy-saving effect, and capable of measuring personnel density, controlling the air conditioning air supply tail ends to run at maximum refrigerating capacity in summer and run in minimum heating quantity in winter when the density of indoor personnel is high and the apparent temperature rises instantly and obviously improving human body thermal comfort when personnel at a waiting hall and an entrance of a high-speed rail or a metro are intensive.

The invention discloses a smart air conditioning system based on the infrared temperature measuring technology. The smart air conditioning system comprises an air conditioning system controller, and an indoor detecting device and an outdoor detecting device which are electrically connected with the air conditioning system controller. The air conditioning system controller is connected with a plurality of air conditioner terminal air supply equipment parallelly connected. An electric rotation platform is disposed at the front end of each air conditioner terminal air supply equipment and provided with an infrared temperature measuring sensor and a remote jet flow nozzle, and the infrared temperature measuring sensor and the remote jet flow nozzle are electrically connected with the air conditioning system controller. Each air conditioner terminal air supply equipment is provided with an air conditioner fan three-speed controller matched with each air conditioner terminal air supply equipment and an air conditioner water system electric valve, and the air conditioner fan three-speed controller and the air conditioner water system electric valve are electrically connected with the air conditioning system controller. The smart air conditioning system is high in intelligence level, widely applicable, good in energy saving effect, and capable of evidently increasing human body thermal comfortableness of people in waiting halls and at entrances of high-speed railways or subways when the waiting halls and the entrances are crowded.

The invention discloses an overall city height control partition method based on comprehensive divisor evaluation. According to the overall city height control partition method based on comprehensive divisor evaluation, required data materials are extracted from relevant legal planning results such as overall city planning first and are imported to a digital technology platform and converted to impact factor control parameters according to a height control mathematic model built after researches, height control values of all street units are obtained, standardized correction is further conducted on the height control values according to a Saaty method, and the final height control partition result is obtained after conversion is conducted on the height control values. The overall city height control partition method based on comprehensive divisor evaluation is based on objective and rational analysis and comprehensive and overall evaluation modes, the data materials are easy to obtain, and therefore the city heights can be effectively controlled in a macro-level mode.

The invention discloses a sewage treatment accurate sludge discharging system and method, according to inlet water online COD detection value, primary settling pond mud scraping machine electric current, primary settling sludge concentration, biological pond sludge concentration, residual pump room sludge concentration, outlet water online TP detection value, outlet water online TN detection value, concentrated tank liquid level and the like, primary settling sludge discharge amount and residual sludge discharge amount are adjusted in real time, reasonable and accurate sludge discharge is facilitated, the stability of the system is promoted, the discharged water is guaranteed to be stably discharged up to the standard, and the production cost of enterprises is reduced.

The invention relates to a creep torque control method in the starting stage of an electric vehicle. The creep torque control method specifically comprises the steps that under the situations that theelectric vehicle is static and a brake pedal and an accumulator pedal are not stepped, a gear position of a gearbox is engaged to a forward gear or a reverse gear, and the torque of a driving motor is controlled through the following steps that 1, the torque of the driving motor is increased from zero to the first torque at the first acceleration; 2, the torque of the driving motor is kept unchanged; 3, when the travelling speed of the electric vehicle reaches the first speed, the torque of the driving motor is decreased at the second acceleration; 4, when the travelling speed of the electricvehicle reaches the second speed, decreasing of the torque of the driving motor is stopped; and 5, the torque of the driving motor is subjected to PI adjustment through the difference value between the actual traveling speed of the electric vehicle and the target creep speed, and thus the traveling speed of the electric vehicle is stabilized at the target creep speed. The creep function of the electric vehicle in the starting stage is achieved, control is precise and reliable, and the control process is scientific and reasonable.

The invention discloses a zebra crossing safety warning system suitable for a vehicle-road cooperation environment, and aims to solve the problem of insufficient traffic safety early warning capability of a street-crossing zebra crossing. The device comprises a monitoring system, a signal control system and a zebra crossing warning lamp group. According to the monitoring system, a multi-target radar detector is utilized, real-time synchronous transmission of data is achieved through an NTCIP communication protocol, and real-time recognition of traffic events is achieved; the signal control system comprises two groups of signal control units which are respectively used for controlling the phase and signal transmission of the zebra crossing LED lamp group; the zebra crossing warning lamp group comprises a zebra crossing LED lamp group and a treading power generation device located below the lamp set, so mechanical energy generated by pedestrians and vehicles on a zebra crossing can be converted into electric energy, and power is independently supplied to the zebra crossing LED lamp group. The invention can finally solve the problem of insufficient traffic safety early warning capability of the crossing zebra crossing, and has important practical significance and practical value for guiding a zebra crossing safety warning system taking establishment of a vehicle speed control andpedestrian warning system as a core.

The invention provides an intelligent distribution method for refrigerating capacity of a central air conditioner. The intelligent distribution method comprises the following steps: S1, performing comprehensive analysis on received user-demand information, indoor temperature detection data information and outdoor temperature detection data information by a cloud server, and forming control information capable of meeting the user demand; S2, receiving the control information, sent out by the cloud server, by a main unit of the air conditioner to further control refrigerant flow amount in a refrigerant pipeline so as to meet the user demand. According to the scheme, through devices, such as the cloud server, a mobile communication terminal, an indoor temperature data acquisition unit, an outdoor temperature data acquisition unit, a display with a display control receiving module, and the like, comprehensive conditioning analysis can be performed on the central air conditioner according to the use demand of a user by combining with user indoor temperature and humidity and user outdoor temperature and humidity, so that resources of the air conditioner are saved to the maximum degree on the premise that the use demand of the user is met.

The present invention discloses a hydroelectric generating set work state algorithm facing centralized control. The algorithm comprises: collecting related devices and output data of the hydroelectric generating set; defining a plurality of states, and defining the judging logic of each state; determining the state of the hydroelectric generating set according to the collected data and the judging logic, and performing statistics of the state parameters of the hydroelectric generating set; and displaying the hydroelectric generating set state and the state parameters for users to perform real-time monitoring and control. According to the collection data detection set and the state of the hydroelectric generating set, the state parameters are subjected to statistics, the state and the state parameters are subjected to display, and the hydroelectric generating set is subjected to optimizing control; and moreover, compared to the traditional method, the hydroelectric generating set work state algorithm facing the centralized control can relieve the operators' workload so as to reduce the misoperation risk of the hydroelectric generating set and reach the purposes of centralized management and control, optimized dispatching and cost decreasing and benefit increasing.

The invention discloses a multi-cold-source intelligent Baijiu brewing thermal environment control system. The multi-cold-source intelligent Baijiu brewing thermal environment control system comprisesa convection heat exchange pit, a built-in fermentation tank, a convection heat exchange cover tank, a system controller I, a rainwater collection pipe, a jet fan, a system controller II, and an underground turning water tank and a workshop. Water inlet pipes, water outlet pipes, water charging motorized valves and water discharging motorized valves are all arranged on the convection heat exchange pit and the convection heat exchange cover tank. The inner walls of the convection heat exchange pit, the inner walls of the built-in fermentation tank and the convection heat exchange cover tank are all provided with temperature sensors. Flow sensors and liquid level sensors are installed in the convection heat exchange pit and the convection heat exchange cover tank. An acidity sensor is arranged in the built-in fermentation tank. The multi-cold-source intelligent Baijiu brewing thermal environment control system utilizes circulating water to conduct water bath convection heat exchange onthe fermentation tank, uses the jet fan to conduct air convection heat exchange in an early stage of cooling distillers grains, comprehensively utilizes multiple types of cold sources to control temperature of the fermentation tank in a suitable range, thereby saving energy consumption and improving Baijiu output rate and quality of the Baijiu. The multi-cold-source intelligent Baijiu brewing thermal environment control system can be collected and used for rainwater.

The invention discloses a high performance liquid phase analysis method for mildronates. The conventional analysis methods have defects that: the sample-carrying amount is small, impurities below 0.1 percent cannot be detected, and the requirements of quality control cannot be met. In the method, the mildronates are washed by a high performance liquid chromatograph, an ion exchange chromatograph method and a reversed phase chromatography method, so that all the related materials, such as mildronate methyl ester, bromine and mildronate degradation products, of the mildronates can be detected, the related materials of mildronate medicaments can be efficiently, scientifically and conveniently controlled, and an effective method is provided for the quality standard of the related materials ofthe mildronates.