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38results about How to "Take timely measures" patented technology

Method for improving weighing precision of charging system and device thereof

InactiveCN101963525AShield the problem of inaccurate weighingImprove weighing accuracyWeighing apparatus testing/calibrationEngineeringZero drift
The invention discloses a method for improving the weighing precision of a charging system and a device thereof. The method comprises the following steps of: additionally installing a preset compensation module on a weighing hopper to generate an original weighting value, wherein the standard weight of the preset compensation module is larger than the maximum positive zero drift value and the maximum negative zero drift value of the weighing hopper; computing to obtain the current practical value of the material on the weighing hopper according to the original weighting value and the weighing detection value of the weighing hopper; stopping vibrating a high-level stock bin when the current practical value is near to a set material adding value; and discharging the material out of the weighing hopper after the weighing detection value is stable and invariable. The device corresponds to the method. By being additionally provided with the compensation module, the invention simply and skillfully overcomes the problem that the weighing is inaccurate caused by the zero drift, improves the weighing precision of the charging system, and can not increase the production cost.
Owner:BAOSHAN IRON & STEEL CO LTD

Air conditioner, condensation judgment method thereof and computer readable storage medium

The invention discloses a condensation judgment method of an air conditioner. The condensation judgment method of the air conditioner comprises the following steps of obtaining the fresh air temperature, indoor temperature and fresh air humidity in real time or regularly when it is detected that the air conditioner is in a fresh air mode; calculating the fresh air dew-point temperature according to the fresh air temperature and the fresh air humidity; judging whether the fresh air dew-point temperature is greater than the indoor temperature or not; and when the fresh air dew-point temperatureis greater than the indoor temperature, determining that the air conditioner is condensed, and adjusting the running parameters of the air conditioner to make the fresh air dew-point temperature be smaller than the indoor temperature, specifically, the running parameters comprise the opening degree of a first air quantity adjusting device and / or the opening degree of a second air quantity adjusting device. The invention further discloses the air conditioner and a computer readable storage medium. According to the air conditioner, the phenomenon of condensation can be found in time, and the service life of the air conditioner is ensured.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Intelligent nursing system for old people

The invention discloses an intelligent nursing system for old people. The system comprises a mobile terminal, an indoor monitoring system, an outdoor monitoring system and a positioning system. A parameter setting module and an editing module are arranged in the mobile terminal. The indoor monitoring system comprises a plurality of monitoring devices arranged in a house of an old person, a plurality of pressure sensors arranged in a mattress, and a sleep state detection unit arranged on the bed head. The outdoor monitoring system comprises a moving unit arranged on the body part of the old person. The mobile unit comprises a bracelet arranged at the wrist part, a fall sensing unit arranged at the leg part and a camera arranged on the clothes. The positioning system establishes wireless connection with the mobile terminal based on a GPS positioning unit, and the positioning system is a positioning sensor arranged on the body of the old person. According to the invention, indoor, outdoorand sleep states of the elderly are comprehensively monitored, emergency situations and subtle abnormal change information of the elderly are mastered in time, measures can be taken in time, safety is high, and reliability is high.
Owner:合肥林夏智能科技有限公司

Monitoring system and method of subgrade settlement

The invention discloses a monitoring system and method of subgrade settlement. The monitoring system is characterized by comprising the monitoring system comprises reference pegs arranged on base rocks of the two ends of a section of subgrade, several settlement pegs are arranged at the portion, between two reference pegs, of the subgrade at equal intervals, a guide rail is erected on the reference pegs and the settlement pegs through several supporting rods, and a position marker is arranged at the portion, opposite to each settlement peg, of the guide rail; a monitoring vehicle comprises a vehicle body and a monitoring vehicle controller, an electric guide wheel assembly connected with the monitoring vehicle controller is installed on the vehicle body, the vehicle body is erected on theguide rail through the electric guide wheel assembly and is provided with a position detector, a height detection device and a communication module, the position detector is connected with the monitoring vehicle controller to be used for detecting the position markers on the guide rail, the height detection device is connected with the monitoring vehicle controller to be used for obtaining vehiclebody height values when the vehicle body stops on the position markers one by one, and the communication module is used for sending the obtained vehicle body height values to a monitoring center.
Owner:浙江苍交建设有限公司

Fully-digital distributed scintillation crystal lifting furnace control system

A fully-digital distributed scintillation crystal lifting furnace control system includes an upper computer, an intermediate-frequency heating module, a weighing module, and a crystal growth control module. A control module communicates with the weighing module to obtain a weighing signal, the control module communicates with the intermediate-frequency heating module to set a power value and read an intermediate-frequency parameter, the control module communicates with the upper computer to upload a monitoring signal and receive an operating command, and all the communication is digital and greatly improves the control accuracy of the system. The system provided by the invention is designed based on the ideal of a distributed control system. The control module and the upper computer are mutually independent in function, so that crystal growth control can get rid of software of the upper computer and normally proceed, and hidden danger brought by faults of the upper computer is prevented. Meanwhile, one upper computer can be connected with multiple lower computer control modules, so that crystal growth can be monitored in a more concentrated manner, and equipment and manpower costs are reduced greatly.
Owner:RAYCAN TECH CO LTD SU ZHOU

Environment monitoring device and environment monitoring method

The invention discloses an environment monitoring device. The environment monitoring device comprises a storage battery, a collection module, a communication module, a processor and a management service database; the storage battery supplies power to the collection module; the collection module is used for collecting region environment data; the communication module is used for receiving collected region environment data and transmitting the collected region environment data to a processor; the processor performs analysis processing on the collected data and transmitting the data to the management service database; the collection module comprises an air pressure sensor, a humiture sensor and an air sensitive sensor. The air pressure sensor is used for measuring absolute intensity of pressure of ambient atmosphere; the humiture sensor is used for measuring atmosphere temperature and relative humidity of the environment; the air sensitive sensor is used for detecting concentrations of oxide, gas, and coal gas in the environment. The environment monitoring device of the invention can be switched between a dormant state and a sensor working state, can selectively start one or multiple sensors and saves monitoring cost, and is portable and electricity-saving.
Owner:HEFEI TONGYOU ELECTRONICS TECH CO LTD

Goaf fire source position detection system and method based on natural potential method

The invention discloses a goaf fire source position detection system and a goaf fire source position detection method based on a natural potential method, which relate to the field of mine fire prediction and control. The goaf fire source position detection system comprises a fire source position detection control device, a power supply and a natural potential detection device, wherein the fire source position detection control device and the natural potential detection device are respectively connected with the power supply, and the fire source position detection control device comprises a data acquisition module, a data processing module and an inversion mapping module; the natural potential detection device comprises a reference electrode and measuring electrodes, each measuring electrode is correspondingly connected with a data acquisition card, the data acquisition cards are used for temporarily storing potential signals acquired by means of the measuring electrodes, and a protection device is further arranged above each data acquisition card. The goaf fire source position detection system and the goaf fire source position detection method solve the technical problem that real-time monitoring of the spontaneous combustion area of the coal mine goaf is difficult, can determine the range and boundary of the ignition area of the goaf, provide help for control over the fire area, and further improve the fireproof effect of the coal mine goaf.
Owner:SHANDONG UNIV OF SCI & TECH

Fault-tolerant control method of air conditioner and air conditioner

The invention provides a fault-tolerant control method of an air conditioner and the air conditioner. The method comprises the following steps: sampling alternating-current voltage and direct-currentvoltage, obtaining an alternating-current voltage sampling value and a direct-current voltage sampling value, judging whether the direct-current voltage sampling value meets a first preset condition or not, and if the direct-current voltage sampling value meets the first preset condition, operating according to an average current PFC control algorithm, otherwise, operating according to an adaptivePFC control algorithm. The invention further provides the air conditioner, the air conditioner comprises the controller storing the fault-tolerant program, and the fault-tolerant control method of the air conditioner according to any one of the claims 18 can be achieved. According to the invention, the redundancy design of the algorithm is utilized, and the self-adaptive PFC control algorithm isused as an alternative scheme of the average current PFC control algorithm, so that the air conditioner can still normally operate under the condition of a direct-current voltage sampling fault, the hardware of the air conditioner is protected from being damaged, and meanwhile, the normal refrigerating and heating functions of the air conditioner are not influenced, so that experience of the useris guaranteed.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD

Mining area safety monitoring system

The invention belongs to the technical field of mining area safety monitoring, and particularly relates to a mining area safety monitoring system which comprises a connecting channel area, a working area and a management area. The connecting channel area comprises an application registration module, a login module and a mining area safety monitoring system connecting module; the mining area safetymonitoring system connecting module is used for realizing information transmission with the mining area safety monitoring system; and the working area comprises a working module, a safety module anda time module. According to the invention, the working area, the management area and the mining area safety detection system are matched with each other, meanwhile, the safety of the mining area is comprehensively monitored through the monitoring module, the information is transmitted to a processing and analyzing module for analysis and comparison, and if an abnormal condition occurs, an information processing module sends out a prompt to an early warning module, and the early warning module takes corresponding early warning measures according to the received prompt level, so that the dangerof the mining area is predicted and evaluated in advance, countermeasures are taken in time, and the personal safety of workers in the mining area is further ensured.
Owner:李静娴

Multi-channel piezoelectric type 3D printing spraying head fault identification and state monitor system and method

The invention discloses a multi-channel piezoelectric type 3D printing spraying head fault identification and state monitor system and method. The system comprises a spraying head drive circuit, a multi-channel strobe circuit, a piezoelectric signal collecting circuit and a monitoring unit. The spraying head drive circuit is used for providing drive signals to enable a piezoelectric spraying headto carry out spraying. The multi-channel strobe circuit is used for providing multi-channel alternating strobe signals to achieve alternating monitoring over multiple spraying holes of the piezoelectric spraying head. The piezoelectric signal collecting circuit utilizes the self-inducting and detecting manner to collect residual vibration signals in a piezoelectric spraying head runner cavity. Themonitoring unit comprises a drive voltage monitoring module, a liquid viscosity monitoring module, an ink supply pressure monitoring module and a drop spraying speed calculation module and used for monitoring the working state of the piezoelectric spraying head. The system can effectively identify the fault type and the generation reason, the monitoring accuracy is improved, and users can adopt effective measures conveniently. Meanwhile, an external sensor is not needed, and the hardware cost is reduced by means of the alternating monitoring manner. Monitoring can be carried out in the working process of the spraying head, and the monitoring flexibility is improved.
Owner:XI AN JIAOTONG UNIV

Method for visually and quantitatively implementing gynaecology and obstetrics operation and equipment thereof

InactiveCN101836883APrecisely guide the operationPreservation of gestational sac image dataCatheterObstetrical instrumentsHuman–machine interfaceControl system
The invention provides equipment for visually and quantitatively implementing gynaecology and obstetric operation, comprising a superconductivity visual gynaecology and obstetrical instrument and a human-machine interface system; wherein the treading negative pressure part is removed in the superconductivity visual gynaecology and obstetrical instrument, and the human-machine interface system is connected on the host of the whole course superconductivity visual gynaecology and obstetrical instrument. The human-machine interface system comprises an image storing system, a negative pressure control system, a negative pressure warning system and a music regulating system. By adopting the operation instrument of the invention, gynaecology and obstetric operation can be visually and quantitatively implemented, data and image before and after operation are record, concrete values of all the parameters required by the operation are set according to the given advised range, when the set concrete value is out of the advised range, the warning system gives out an alarm; and the operation is implemented under the condition of the selected concrete values of all the parameters required by the operation, and data after operation is record and stored. Operation index is quantized under visual condition, safety performance of operation is improved, and medical accident caused by misoperation is reduced.
Owner:无锡中大影像科技有限公司

A Internet of things monitoring method for farmland planting pollution prevention

The invention discloses an internet of things monitoring method for farmland planting anti-pollution, which is characterized in that: a solar energy wireless camera device comprises an agricultural internet of things, a pollution data acquisition system, a pollution data analysis and transmission unit, a video and network unit and a power management unit; The pollution data acquisition system is connected with a video and a network unit, and is used for collecting environmental data and transmitting the environmental data to the network unit. The pollution data analysis propagation unit is connected with a video and a network unit. The collecting system of the invention is connected with the video and the network unit, so that the pollution in the farmland is transmitted to the remote terminal in time, and the measures are convenient to take in time to prevent and control the pollution.
Owner:合肥辰知智能科技有限公司

Method for reinforcing brick wall of ancient building

The invention discloses a method for reinforcing a brick wall of an ancient building. The method comprises the following steps of (a) wall surface treatment, (b) foundation arrangement, (c) enclosureunit installation, (d) vertical standing, (e) corner arrangement, and (f) protection unit installation. The method for reinforcing the brick wall of the ancient building has the advantages that the process is simple; the operation difficulty is low; the operation is performed from small to large and from local to whole, and is reasonable and ordered; the gradual formation is realized; the reinforcing quality can be easily guaranteed; the inner and outer wall surfaces and the corners are reinforced at the same time; the comprehensiveness is high; and the reinforcing effect is good.
Owner:CHENGLONG CONSTR GROUP

Double-control angle type safety valve

The invention discloses a double-control angle type safety valve, and aims to solve the defects that a system is damaged or even security accidents are caused as the pressure inside the system is too high since an electronic control valve cannot be normally opened to release the pressure if the electronic control valve has power-off faults. The double-control angle type safety valve comprises a main valve, a mechanical guide valve and an electronic control valve, wherein a main valve inlet is formed in the lower end of the main valve; a main valve outlet is formed in a side of the main valve; the main valve inlet and the main valve outlet form an angle structure; a guide sleeve is mounted inside the main valve; a main valve clack is mounted inside the guide sleeve; a main valve cavity is formed above the main valve clack inside the guide sleeve; a pressure inlet cavity and a pressure release cavity are formed inside the mechanical guide valve; a pressure inlet hole, a pressure outlet hole and a pressure discharge hole are formed in the electronic control valve; the main valve inlet and the pressure inlet cavity are communicated through a pipeline; the pressure inlet hole and the pressure inlet cavity are communicated through another pipeline; the pressure outlet hole and the main valve cavity are communicated through another pipeline; the pressure discharge hole and the main valve outlet are communicated through another pipeline; the pressure inlet hole and the pressure outlet hole are at a normally communicated state; and the pressure discharge hole is at a normally closed state.
Owner:LUOFU VALVE GROUP

Computer network information safety control device

The invention discloses a computer network information safety control device which comprises a case, a power line plug is installed on the inner wall of one side of the case, an electric push rod is installed on the inner wall of the other side of the case, the end of the electric push rod is connected with a power supply device, the power line plug is connected with a power supply device through a wire, the top surface of the power supply device is connected with a vertical wire passing pipe, the top of the wire passing pipe is electrically connected with a USB interface, the top surface of the case is provided with a through hole corresponding to the USB interface, the inner wall of the case is provided with an infrared sensor, the outer side of the case is provided with an alarm and a controller, the controller is electrically connected with the infrared sensor, the alarm and the electric push rod, and a display screen, a keyboard, a face recognition camera, a coded lock module and a fingerprint lock are arranged on the controller. Compared with the prior art, the method has the advantages that other illegal users are prevented from opening the computer, and the safety control capability is high.
Owner:长春财经学院

Method for judging instability of rock masses of dam abutment of arch dam with structural plane

The invention discloses a method for judging instability of rock masses of dam abutment of an arch dam with a structural plane, which comprises the steps of establishing a stress and strain relationship of a structural plane to obtain a shear force-shear displacement relationship of a fault zone; constructing a sharp point mutation model of rock mass instability; monitoring displacement generatedby the structural surface, and when the instability condition is met, giving an alarm out. In this way, the abrupt change model of the structural surface rock mass instability is constructed; the rockmass instability judgment basis is given, the cusp mutation theory is adopted to solve the problem of actual rock mass discontinuity, the method no longer takes the rock mass as a continuous whole, the influence of the properties of surrounding rock and cracks on rock mass stability is considered, the method is more reasonable, an alarm is given once the structural surface is about to be unstable, and measures can be taken in time conveniently.
Owner:SHAZHOU PROFESSIONAL INST OF TECH +2

Abnormality determination method and device for ad-hoc query, electronic equipment and medium

The embodiment of the invention provides an abnormality determination method and device for ad-hoc query, electronic equipment and a storage medium, and relates to the field of data processing. The method comprises the following steps: obtaining a historical SQL instruction and an actual query time length according to a method independent weight related content; based on the instruction characteristics of the SQL instructions and the data characteristics obtained based on the SQL instructions, clustering historical SQL instructions received within a set time period to obtain an SQL cluster; then, according to the actual query duration, determining a cluster variation coefficient of each SQL cluster; and determining an abnormal result of executing an ad-hoc query SQL instruction based on each clustering variable coefficient. According to the embodiment of the invention, the abnormal condition of ad-hoc query of the system is automatically sensed, and the stability of query time consumption is effectively guaranteed.
Owner:GUANGZHOU HUYA TECH CO LTD

Unattended monitoring equipment for forests and use method

The invention discloses unattended monitoring equipment for forests and a use method. The specific use method comprises the steps of 1, adopting an illumination intensity sensor, a temperature and humidity sensor, a carbon dioxide concentration sensor and a PM2.5 detection sensor to receive control instructions sent by a remote monitoring terminal, acquiring various environmental indexes of a forest, and sending index data to the remote monitoring terminal through a wireless network; and 2, by the remote monitoring terminal, setting various standard indexes of a forest environment, sending thecontrol instructions to the illumination intensity sensor, the temperature and humidity sensor, the carbon dioxide concentration sensor and the PM2.5 detection sensor, receiving real-time index datasent by a data acquisition instrument, and carrying out real-time monitoring on the forest environment. According to the novel unattended monitoring equipment and the use method, the practicability ishigh; the use and installing methods are simple in step; the functions are complete; the manufacturing cost is low; various requirements in use are met; and the equipment is suitable for wide popularization and application.
Owner:NANJING ZHONGYUANTONG COMM TECH CO LTD

Intelligent robot danger early warning system based on Internet of Things

The invention discloses an intelligent robot danger early warning system based on the Internet of Things. The intelligent robot danger early warning system comprises a danger monitoring system, a danger comparison and classification system and a danger early warning reminding system. The danger monitoring system comprises an internal monitoring system and an external monitoring system; wherein the internal monitoring system further comprises an electric leakage detection system and a fault diagnosis system, the external monitoring system further comprises a gas monitoring module and a temperature monitoring module, and the danger early warning reminding system correspondingly gives out danger early warnings and lights up corresponding warning lamps according to detected signals analyzed on the internal monitoring system and the external monitoring system. According to the intelligent robot danger early warning system based on the Internet of Things, the line condition of the robot can be detected in time through the electric leakage detection module, detected data are sent to the control center in real time, workers in the control center can know the line condition in the robot, power can be cut off in time, and the work efficiency is improved. And danger is automatically removed, and self-protection is achieved.
Owner:徐丽庆

Urban management mobile law enforcement information system

InactiveCN107896254ARealize functions such as address matchingAchieve overall graspParticular environment based servicesClosed circuit television systemsInformation processingHandling system
The invention provides an urban management mobile law enforcement information system. The system comprises a law enforcement information system body, the law enforcement information system body comprises a collection module, a control panel, a monitoring module and a cooperative work management module, wherein the cooperative work management module comprises a supervision center, a command centerand an integration module; the supervision center comprises an information module, a mobile phone APP and a feedback subsystem; the command center comprises an interaction digital wall, a communication network, a capital construction maintenance and emergency processing system; the integration module comprises a PC computer, a comprehensive evaluation subsystem and a resource matching mechanism;the monitoring module comprises a temperature sensor, a humidity sensor and a dust sensor; the collection module comprises wireless collection equipment, public information processing equipment and ageographic encoding end; the wireless collection equipment comprises a video camera, a wireless sending end and a wireless receiving end. The urban management law enforcement information system disclosed by the invention is reasonable in design, and is convenient for use from different angles of the urban management.
Owner:广州普贤电子科技有限公司

Intelligent forestry environment data transmission system

PendingCN111935293AEasy to findIt is convenient for relevant security personnel to find out in timeTelevision system detailsParticular environment based servicesForest industryEnvironmental resource management
The invention discloses an intelligent forestry environment data transmission system. The system comprises an environmental data acquisition system, a data transmission system, a data receiving system, a data analysis system and a data alarm system, wherein the environmental data acquisition system transmits environmental data to the data receiving system through the data transmission system, thedata receiving system transmits the received data to the data analysis system, and the data analysis system is connected with the data alarm system. Compared with the prior art, the sensors are arranged at multiple positions of the forest to monitor images, weather, smoke and other information of the forest; collected information is transmitted to the mobile terminal through the network, and dataanalysis is performed through the mobile terminal, so that related safety protection personnel can find fire alarm positions, conditions and the like in time, measures can be taken in time conveniently, potential safety hazards are prevented from being expanded, and the system is convenient to use and has application and popularization value.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY

Examination and parturition bed for obstetrics department

The invention belongs to the technical field of medical equipment, particularly relates to an examination and parturition bed for the obstetrics department, and aims to solve the problems that an existing parturition bed is single in function, troublesome in mattress replacing and inconvenient to regulate. According to the technical scheme, the examination and parturition bed comprises a first bedframe and is characterized in that a second bed frame is hinged to the outer wall on one side of the first bed frame, a metal support rack is hinged to a position, close to the second bed frame, of the inner wall of the first bed frame, a first support is hinged to one end, away from the metal support rack, of the inner wall of the first bed frame, first damping telescopic rods are hinged to twosides of the outer wall on one side of the first support, one ends, away from the first support, of the lateral walls of the two first damping telescopic rods are hinged to the inner walls on two sides of the first bed frame, the outer wall on one side of the top end of the first bed frame is provided with a mounting groove, and a blood collecting plate is connected into the mounting groove in a clamped manner. The examination and parturition bed is capable of storing a nonwoven-fabric mattress, convenient in replacement, simple to operate, sanitary, safe, capable of increasing work efficiency, capable of enriching the functions of the bed and capable of binding and fixing the legs of a lying-in woman.
Owner:冯海英

Earthquake alarm system and device based on wireless Internet of things

An earthquake alarm system and device based on a wireless Internet of things are characterized in that the system and device comprise an Internet-of-things control unit and a plurality of pieces of earthquake alert and alarm equipment with wireless transmitting modules. The Internet-of-things control unit is built on a 4G wireless network platform. The Internet-of-things control unit comprises anMCU module, a Zigbee wireless network terminal, a Zigbee wireless network coordinator, a short message alarm, a central controller, a 4G module, mobile terminal equipment and a power supply. The Zigbee wireless network coordinator is connected with the central controller, the central controller is connected with the short message alarm, and the short message alarm is connected with the mobile terminal equipment through the 4G module. The earthquake alarm system and device have the advantages of simple structure and high sensitivity. The earthquake alarm system and device can send a wireless alarm signal or a sound-light alarm signal to relevant workers in time before an earthquake, so that people have enough time to evacuate, and the damage of earthquake to people is reduced.
Owner:DALIAN XINCHENG CREDIT MANAGEMENT CONSULTING

Method for detecting service life of steel plate chromium plating solution

The invention relates to a method for detecting the service life of a steel plate chromium plating solution, the method sequentially comprises the following steps: establishing a relation model which comprises a first relation model and a second relation model; taking chromium plating solutions of the unit at different times or at different stages; adding hydrogen peroxide into the chromium plating solution to obtain a first solution; adding ammonia water or sodium carbonate into the first solution for pH value characteristic regulation and control, gradually increasing the pH value, and controlling the numerical range of the pH value of the first solution to be 3-6; carrying out particle size analysis and centrifugal sedimentation on the first solution to obtain sediment of impurity ions, and drying and weighing the sediment; if conditions are met, obtaining the service life of the corresponding chromium plating solution according to the first relation model; and if the pH value of the first solution in the numerical range cannot meet the conditions in the first relation model, adding the mixed solution into the first solution and regulating to obtain a second solution with the pH value of 2, and obtaining the service life of the chromium plating solution according to the second relation model.
Owner:BAOSHAN IRON & STEEL CO LTD

Air conditioner fault-tolerant control method and air conditioner

The present invention proposes a fault-tolerant control method for an air conditioner and an air conditioner, the method comprising: sampling an AC voltage and a DC voltage, obtaining a sampled value of the AC voltage and a sampled value of the DC voltage, and judging whether the sampled value of the DC voltage satisfies a first preset conditions, if the DC voltage sampling value satisfies the first preset condition, it operates according to the average current PFC control algorithm; otherwise, it operates according to the adaptive PFC control algorithm. The present invention also proposes an air conditioner, including a controller storing a fault-tolerant program, which can realize the fault-tolerant control method of the air conditioner according to any one of claims 1-8. The present invention utilizes the redundant design of the algorithm, and uses the self-adaptive PFC control algorithm as an alternative to the average current PFC control algorithm, so that the air conditioner can still operate normally in the case of a DC voltage sampling failure, which not only protects the air conditioner hardware from damage, and at the same time ensure that the normal cooling and heating functions of the air conditioner are not affected, ensuring the user experience.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD

Multi-channel piezoelectric 3D printing nozzle fault identification and status monitoring system and method

Disclosed are a fault identification and state monitoring system and method for a multi-channel piezoelectric 3D printing spray head. The system comprises a spray head driving circuit, a multi-channel gating circuit, a piezoelectric signal acquisition circuit and a monitoring unit. The spray head driving circuit is used for providing a driving signal to enable a piezoelectric spray head to perform spraying; the multi-channel gating circuit is used for providing a multi-channel in-turn gating signal to realize in-turn monitoring of a plurality of spray holes of the piezoelectric spray head; the piezoelectric signal acquisition circuit uses a self-sensing detection method to acquire a residual vibration signal in a runner cavity of the piezoelectric spray head; and the monitoring unit comprises a driving voltage monitoring module, a liquid viscosity monitoring module, an ink supply pressure monitoring module and a liquid drop spray speed calculation module, and is used for monitoring the working state of the piezoelectric spray head. The system and method can effectively identify the type and cause of a fault, improve monitoring accuracy and facilitate a user in taking effective measures; no external sensor is required; in-turn monitoring reduces the hardware cost; and monitoring can be performed during a working process of a spray head, and the monitoring flexibility is improved.
Owner:XI AN JIAOTONG UNIV

Waterproof mouse blocking board device for 10kV electricity distribution room

The invention discloses a waterproof mouse blocking board device for a 10kV electricity distribution room. The waterproof mouse blocking board device comprises a fixed clamping tank, liquid level sensors, protective shells and waterproof boards, wherein a bottom tank is formed in the inner wall of the bottom of the fixed clamping tank, the waterproof boards are movably connected to the center of the inner walls on two sides of the fixed clamping tank through clamping connection, and waterproof fillings are stuffed between the two waterproof boards. According to the waterproof mouse blocking board device disclosed by the invention, the fixed clamping tank, the waterproof boards and the liquid level sensors are arranged, so that when a mouse preventing board is used, small animals of mice and the like can be stopped through the waterproof boards; through airtight clamping connection of the waterproof boards, the fixed clamping tank and the bottom tank, the mouse preventing board has definite waterproof properties; and the liquid level sensors are arranged on positive and negative two surfaces of the waterproof boards, the liquid level of water exceeds the set warning value, through GPRS wireless transmission to cell phones of personnel, long-range monitoring of liquid level differences inside and outside the electricity distribution room can be realized, whether water leakage situations exist or not can be monitored in a long-range manner, information is convenient to timely transmit, measures are convenient to time take, and further loss enlargement is avoided.
Owner:STATE GRID SHANDONG ELECTRIC POWER

Inverter efficiency information deriving device and method

According to one disclosure, the present invention can provide an inverter efficiency information deriving method for deriving inverter efficiency information in solar power generation using a linear regression model, comprising the steps of: acquiring a plurality of meteorological elements from a sensor unit in a solar power generation system at a predetermined cycle, and acquiring inverter state information from an inverter; for the state information of the inverter, selecting a meteorological element capable of modeling the efficiency of the inverter as a first parameter according to a linear analysis result of each of a plurality of meteorological elements; generating a linear regression model by using the linear correlation between the first parameter and the inverter state information; according to a modeling result obtained by utilizing the linear regression model, calculating a residual error based on inverter efficiency analysis, and setting a judgment threshold value as a reference value for judging the efficiency of the inverter; and predicting the abnormal condition of the solar power generation system by using the judgment threshold value and the residual error.
Owner:T E F CO LTD
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