103results about How to "Discover hidden dangers in time" patented technology

The invention provides an online monitoring system for the corrosion state of oil and gas pipelines and a method thereof, which can monitor sensitive corrosion points, such as an elbow, liquid accumulating parts at upper and lower slopes, and the like and insensitive corrosion points and realize the remote transmission of corrosion monitoring data in a wired or wireless manner, treat the data at a monitoring center, establish the corrosion state parameter of each point of the oil and gas pipelines via a modern digital signal treating method, judge whether the corrosion state is normal or not,and carry out the corresponding treatment and the control of the pipelines to timely monitor the corrosion state of the oil and gas pipelines so as to timely discover hidden troubles and prevent safety accidents. A three-dimensional corrosion state graph of the pipeline can be visually displayed at the monitoring center so that abnormal corrosion parts can be found out. The scheme of the system has the advantages of low cost and high benefit, and the key is that the system can realize real-time monitoring based on the prior art; and more important, the system can be applied to monitoring the corrosion state of newly-built long oil and gas pipelines such as pipelines for transporting the natural gas from the West to the East so that the system has a very wide market prospect. The oil and gas pipelines can be laid on the ground or buried under the ground.

The invention discloses a BIM-based digital twin smart machine room management method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining the operation data of a to-be-monitored object in real time, storing the operation data in an operation and maintenance database, and updating an integrated BIM model of a to-be-monitored scene; judging whether theto-be-monitored object is in a fault state or not according to the operation data: if the to-be-monitored object is in the fault state, displaying an alarm identifier for the to-be-monitored object inthe fault state on the integrated BIM model, and taking the to-be-monitored object corresponding to the alarm identifier as a to-be-processed object; displaying the alarm information corresponding tothe to-be-processed object, performing fault diagnosis on the to-be-processed object, generating a maintenance work order, and obtaining a fault diagnosis result and the maintenance work order; according to the fault diagnosis result, recommending a fault solution corresponding to the to-be-processed object by utilizing a preset neural network model. According to the invention, a user can maintain the data center efficiently, and the fault processing efficiency is improved.

The invention discloses a vehicle-mounted end of a comprehensive vehicle fault detection system. The vehicle-mounted end communicates with cloud equipment through a network, wherein the vehicle-mounted end comprises a monitoring module, a memory and a log recording module, wherein the monitoring module monitors a monitoring point and acquires state information in real time; and the log recording module records the state information in the memory of the vehicle-mounted end in a preset log format. The invention further discloses a data processing method based on the vehicle-mounted end. The vehicle-mounted end of the comprehensive vehicle fault detection system and the data processing method of the vehicle-mounted end disclosed by the invention can effectively find out various problems of a vehicle in time, and also can summarize and comprehensively analyze the various problems of the vehicle.

The invention relates to the field of bridge engineering detection, specifically to a bridge damage diagnosis method based on an axle coupling system. The bridge damage diagnosis method includes the following specific steps: a. two detection vehicles depart from different positions of a bridge towards a 1# abutment direction to pass the bridge, and a signal acquisition subsystem synchronously acquires vertical acceleration response in the process of trolleys passing the bridge each time; b. the two detection vehicles depart from different positions of the bridge towards a 0# abutment direction to pass the bridge, and the signal acquisition subsystem synchronous acquires vertical acceleration response in the process of the trolleys passing the bridge each time; and c. using the vertical acceleration response of the trolleys measured in Step a and Step b to perform secondary integration processing on time t separately, thereby obtaining approximate vertical displacement response of the corresponding trolleys. Through the bridge damage diagnosis method based on the axle coupling system, detection signals can be obtained on the bridge to be detected through the detection vehicles, damage information of the bridge can be obtained through corresponding processing conversion according to the detection signals, the approximate position of bridge damage does not need to be known in advance, the operation is simple and easy, and the efficiency is high.

The invention discloses an optical cable monitoring apparatus, belonging to professional field of telecommunication network maintenance. The apparatus comprises an OTDR meter, an optical cable monitoring centre server, a large distributed database, a system client end. The OTDR meter is arranged in the centre equipment room of prefectures via connection of the DCN network; optical channel selecting switching is arranged in the meter to respectively monitor optical fibers with different directions; the optical cable monitoring centre server, system client end use working ways of C / S or B / S; the system client end of the prefectures logins the optical cable monitoring centre server of provincial company via the permission; the optical cable monitoring centre server controls the OTDR meters to process test; the test data are uploaded to the optical cable monitoring centre server to process automated analysis and comparison via the DCN network, automatically generating warming and forming sorts of maintenance statements. This invention effectively enhances the optical cable maintenance efficiency and timely finds hidden troubles in the optical cable, in addition the construction cost is low and the position-setting is simple and convenient and easy for maintaining.

The invention relates to a method for simultaneously determining various metal elements in transformer oil. An analyzing sample of the transformer oil of the invention is weighed quantificationally after a collected oil sample is heated and stirred uniformly; an infrared heating method is adopted for carrying out vaporizing and carbonizing at constant temperature on the analyzing sample of the quantificational transformer oil, a box type high temperature furnace is adopted for carrying out high temperature cineration on the carbonized sample, acid liquid is adopted for carrying out dissolving on the incinerated sample under the lower temperature heating condition, a soluzione leggermente acida is adopted for carrying out diluting and volume fixing on the dissolved sample to be prepared into analyzing liquid. The analyzing liquid accurately determines the content of various metal elements by using a complete spectrum direct reading plasma emission spectrum apparatus. The method of the invention can determine a plurality of elements and has high accuracy, can determine oil mediums with different varieties and content ranges, being capable of accurately showing the change current of the metals in the oil mediums and being convenient for accurately analyzing and finding out hidden troubles in time.

The invention discloses an online state detection device of an overhead transmission line. According to the device, a date transfer unit (DTU), an actual sag measurement system, a windage yaw monitoring system, a conducting ground wire vibration monitoring system, an actual wire temperature measurement system, a tower inclination monitoring system, a fault location property judgment application system, an online transmission line capacity increasing system, a temperature and humidity sensor, an inclination angle sensor, a tension sensor, a wind speed sensor, an insulator pollution degree measuring device, a smoke transducer, a radio frequency (RF) module, a video compression card, a 74HC165, an infrared microwave anti-theft sensor and a FLASH memory are directly connected to a micro control unit (MCU); a lightning stroke positioning system is connected to the RF module; a fast ball is connected to the video compression card; the MCU is connected to the fast ball; a wind direction sensor is connected to the 74HC165; a battery control board is connected to the MCU; and the battery control board is connected to a solar cell. According to the device, the state of an overhead transmission line can be detected in real time, the hidden danger is timely discovered, and the manpower and material resources are saved.

The invention relates to the technical field of a cable network running integrated management system and an intelligent control platform, in particular to a software intelligent control platform which can collect all status parameters in online running of a cable and is used for arranging and classifying the data to be stored, automatically analyzing the data variation and for issuing an alarm and controlling remote equipment in real time. The software intelligent control platform has a hardware environment and a software environment, a stable and reliable running, maintenance and management system is established, and reliable guarantee is provided for normal running and expansion of each application. Due to the adoption of the system, the key information needed by the analysis and decision can be timely, quickly, simply and conveniently acquired, so that the time for the analysis and the decision can be reduced, the consumption of the human resource can be reduced, and the high-efficient and low-cost electric network management can be realized. The potential danger of the cable equipment can be discovered in time, the electric power accident can be prevented, and the economic loss can be remarkably reduced.

The invention discloses a system and a method for monitoring an optical cable of a backbone network. The system comprises a light source, an optical pulse forming unit, a photoelectric detection unit, a data processing unit, an early warning unit and a display unit; the optical pulse forming unit is used for generating local oscillation light and pulsed light according to the light emitted by the light source, the pulsed light is transmitted to a measured sensing optical cable, and backward Rayleigh scattering light generated by the pulsed light in a propagation process is sent to the photoelectric detection unit together with the local oscillation light; the photoelectric detection unit is used for carrying out coherent detection on the backward Rayleigh scattering light and the local oscillation light; the data processing unit is used for carrying out data processing on the signal output by the photoelectric detection unit and outputting a monitoring result; the early warning unit is used for carrying out fault early warning according to the monitoring result; and the display unit is used for displaying a map and locating the fault position according to the map and the monitoring result, and the map comprises a backbone network circuit and an optical cable. The system and the method disclosed by the invention are used for actively monitoring the performance of the optical cable in real time, finding faults or hidden trouble in time and carrying out fault locating and fault early warning.

The invention discloses an in-situ aging sensor and an aging monitoring method based on a backup circuit. The in-situ aging sensor comprises a backup combinational logic unit, multiple multiplexers and a counter. The aging monitoring method comprises the steps as follows: setting the backup combinational logic unit identical with a primary circuit combinational logic unit; testing the primary circuit combinational logic unit and the backup combinational logic unit at different moments ti (i is equal to 0, 1, 2...) respectively to obtain total delay values of the two units at different momentsti; comparing total delay values of the two units at the tn moment with total delay values of the two units at the tm moment respectively, correcting the comparison value of the primary circuit combinational logic unit by use of the comparison value of the backup combinational logic unit to obtain the aging coefficient of the primary circuit combinational logic unit from the moment tm to the moment tn. High-precision aging measurement is realized, effects of process and temperature on aging monitoring are offset, high reliability of military electronic equipment circuits is guaranteed, and hidden risks of circuits can be discovered timely.

The invention discloses a method preventing abnormal charging of a blade charging machine. The method comprises the steps that data collection is achieved through a PLC; collected pipeline pressure is compared with a theoretical value in a pipeline pressure characteristic curve, wherein the theoretical value is obtained by inquiring a table; if the pipeline pressure is smaller than or larger than the theoretical value, warning information is sent; collected feed liquid flow quantity in a charging pipe is compared with theoretical flow quantity, wherein the theoretical flow quantity is obtained by inquiring a corresponding table; if the feed liquid flow quantity is lower than the theoretical flow quantity, warning information is sent; collected atomization steam pressure is compared with a technological requirement value, and warning information is sent if the atomization steam pressure is smaller than the technological requirement value; after production is finished, the average running frequency of a charging pump is calculated, the average frequency is compared with an ideal area, and warning information is sent if the average frequency is larger than the ideal area; a total score is calculated, and warning information is sent if the deduction score is larger than set score. According to the method preventing abnormal charging of the blade charging machine, health monitoring of a charging system of the blade charging machine is achieved, and therefore system hidden dangers can be found timely.

The invention provides a fire emergency lighting power supply having a self-checking function. In the fire emergency lighting power supply, by the combination of a switch power supply and a micro-controller, the digital control of the emergency lighting power supply is realized; by using an digital I / O port of the micro-controller, the working state(main supply and inversion) and the load state of the power supply are checked in real time, and according to the state change, the state conversion is controlled, the state is indicated, and faults are alarmed; the voltage of a battery is sampled by using an A / D converter of the micro-controller, and the corresponding battery charge algorithm and intelligent management of the batter charge are realized by software; and the accurate timing(second, minute, hour, day, month and year) is completed by using a real-time clock of the micro-controller, the automatic timing discharge check of the battery is realized, and the hidden danger caused by the capacity shortage of the battery can be found in time. The fire emergency lighting power supply has the advantages of prolonging the service life of the battery, finding system faults in time, and ensuring the fire emergency lighting power supply to work in the normal state to a maximum degree. The fire emergency lighting power supply having the self-checking function can be widely applied to the fire emergency lighting power supply.

The invention discloses a fan gearbox working condition detection and fault diagnosis system which comprises a temperature sensor, a vibration sensor, a noise sensor, a signal preprocessing card, a signal acquiring card, a programmable logic controller (PLC) and an industrial personal computer. The fan gearbox working condition detection and fault diagnosis system performs condition monitoring on operating characteristics of a gearbox, performs monitoring and recording at regular intervals, finds hidden dangers in time, can find out reasons leading to problems, and adopts measures correspondingly to solve the problems.

The invention discloses a management system for a self-service bank and further discloses a management method applying the management system. The management system is applied to the self-service bankand comprises a permission module used for controlling permissions, an early warning module used for detecting danger or potential hazards, and a control module used for controlling hardware equipmentof the whole self-service bank. By grading the permissions, different levels of authorizations can be obtained by users according to different authorization information so that enchashment without cards can be achieved, the management system is more suitable for current living states and requirements, meanwhile, using by the users is also convenient greatly, and thus management for funds and accounts by the users is more flexible. Safety of the funds and information can be ensured even if the users do not use the mode of bank cards plus passwords by combining with an existing image recognition technology and facial recognition technology, and the funds and the information can further be prevented from being stolen because the users have to pass facial recognition.

The invention provides a detection diagnosis method of a vehicle health state and especially relates to a vehicle owner vehicle self-check method based on an intelligent mobile phone platform. The method comprises a Wechat public account end, an APP client, a web client, a cloud server, a general test method, a special-purpose test method, test examination items, a detection report and detection result analysis. A vehicle owner, through following a Wechat public account or downloading the APP client or the web client, accesses the cloud server, performs login and carries out comprehensive detection on an automobile according to the test methods and the detection items provided by detection program design so as to grasp vehicle health conditions at any time, detection results are merged to form the detection report, the detection report is stored in the cloud server, the cloud server, according to detection results obtained by comparing and analyzing the detection items, gives maintenance and repair advice, and at the same time, the car owner can also share the detection report with a maintenance technician and the circle of friends to obtain maintenance and repair advice so as to grasp the opportunity of maintenance and repair.

The invention discloses a monitoring system of a mobile energy storage power station. The monitoring system is characterized in that an SCADA system of a process monitoring and optimizing layer is respectively connected with a BMS monitoring system and a PCS monitoring system of a on-site control layer, and the BMS monitoring system and the PCS monitoring system are monitored and controlled through the SCADA system; the BMS monitoring system monitors running conditions of a battery set, and the PCS monitoring system monitors running conditions of a PCS set, so that the monitoring system of the whole mobile energy storage power station is formed. By the adoption of the structure, the monitoring system has the advantages that the working state of the mobile energy storage power station is monitored so that safe running of the mobile energy storage power station can be guaranteed; the mobile energy storage power station is monitored in a fall-range mode; real-time performance is high, and equipment hidden danger can be timely found.

The invention discloses a knocking scan type bridge damage detecting and positioning system which comprises a traveling car, a knocking subsystem, a signal acquisition subsystem, a signal processing device and a positioning device. The traveling car can move on a to-be-detected bridge; the knocking subsystem is arranged on the traveling car, and is used for applying a knocking load to the to-be-detected bridge; the signal acquisition subsystem is arranged on the traveling car and is used for collecting a response signal transferred from the to-be-detected bridge to the traveling car; the signal processing devise is connected with the signal acquisition subsystem, and is used for receiving and processing the signal collected by the signal acquisition subsystem, and outputting the bridge damage information processed result; the positioning device can move together with the traveling car and is used for real-time detecting and recording the position information of the traveling car. The knocking scan type bridge damage detecting and positioning system provided by the invention can detect bridge damage information in a simple, convenient, efficient and high-accuracy manner, and can locate damage positions of a bridge.

The invention discloses a full-view imaging device for an electric rail traffic contact system mast, which is mainly composed of a vehicle roof device and a vehicle internal device, wherein the vehicle roof device comprises a roof device controller, a camera light source unit and a camera unit; the roof device controller is respectively connected with two groups of camera light source units and two groups of camera units and controls the units for fully collecting the contact system image from the front and reverse two side surfaces; the vehicle internal device comprises a control signal interface, a camera signal interface and two industrial personal computers; the control signal interface is connected with the roof device controller; the camera signal interface is connected with the camera unit and transmits the data shot by the camera to the industrial personal computer. The device fully collects the contact system images from the front and reverse two side surfaces by mounting two groups of cameras with high definition on the roof, and the device can browse the local image with high definition only through overall camera image navigation, reinforces the detecting and monitoring works to the contact system, and has adequate complementary action to the existing method for detecting the contact system.

The invention provides a cable middle connector partial discharge signal detection system. The cable middle connector partial discharge signal detection system comprises an excitation light source, anoptical fiber with a fluorescence optical fiber sensor, an optical fiber wiring box and a fluorescence spectrometer, wherein the optical fiber with the fluorescence optical fiber sensor penetrates into a power cable connected by a middle connector and extends along the length direction of the power cable; the fluorescence optical fiber sensor located at the middle part is clung to the middle connector; two ends of the fluorescence optical fiber sensor are connected with the excitation light source and an input end of the optical fiber wiring box; an output end of the optical fiber wiring boxis connected with the fluorescence spectrometer; a sensing element of the fluorescence optical fiber sensor is made of a fluorescence material; a spectrum range of the sensing element is matched witha spectrum range generated by middle connector partial discharge. The cable middle connector partial discharge signal detection system is not interfered by electricity and has the advantages of stronganti-interference capability and the like; hidden dangers caused by insulation of the power cable middle connector are rapidly and accurately detected, so that coping measurements can be implementedin time, and economic loss caused by power failure and the like is reduced.

The invention discloses a remote monitoring system of multiple ground source heat pumps, comprising a computer or a mobile phone terminal device, a cloud touch screen, a local touch screen and multiple ground source heat pumps with PLC controllers; the computer or the mobile phone terminal device is in communication and connection with the cloud touch screen through an internet; the cloud touch screen is in communication and connection with the local touch screen through the internet; one of the multiple ground source heat pumps is set to be a host machine, and the rest is slave; several slaves are respectively connected with a buried pipe water pump and a user side water pump; all PLC controllers are formed to be a PLAN local area network; the PLC controller of the host machine is in communication and connection with the local touch screen through Modbus communication protocol; the PLC controllers of all slaves are in communication and connection with the PLC controller of the host machine. The remote monitoring system can realize the unmanned guidance of a local machine room and solve problem of insufficient professionals of refined regulating control professionals by the management of professionals at an operation center.

The invention discloses a fixed-wing unmanned aerial vehicle multi-mode signal relay networking collaborative inspection method, which comprises a fixed-wing unmanned aerial vehicle, a fixed-wing unmanned aerial vehicle airport, a central control room and a plurality of relay base stations, the central control room controls the fixed-wing unmanned aerial vehicle to work, and the plurality of relay base stations establish an ad hoc network mutually, and the fixed-wing unmanned aerial vehicle, the fixed-wing unmanned aerial vehicle airport and the relay base station keep communication in real time through the wireless communication module. Through the relay base station carried by the iron tower, fixed-wing unmanned aerial vehicle relay operation electric power inspection is realized, the problems of information transmission failure and the like caused by a wide power grid range and obstacles between geographic positions in the existing electric power inspection process are solved, the transmission distance of wireless signals is increased, the visual inspection process of the fixed-wing unmanned aerial vehicle is met, operation and maintenance personnel can conveniently find line hidden dangers in time, the inspection range is widened through relay operation, and the operation efficiency of the fixed-wing unmanned aerial vehicle is greatly improved.

The invention discloses a fire-fighting water monitoring system and method. The system comprises a monitoring system, an identification system and an alarm system, wherein the monitoring system comprises a water tank water level monitoring system, a fire-fighting water pipe water pressure monitoring system and a fire-fighting water pipe flow monitoring system. The method comprises the steps that awater level sensor collects liquid level information in a fire-fighting water tank and a fire-fighting water pool installed at the top of a building, a water pressure sensor collects water pressure information of the end of a fire hydrant located between floors, a flow sensor collects water flow information of the water inlet end of a building fire-fighting water pipe, and the information is transmitted to a data recording module. By means of the implementation of the fire-fighting water monitoring system and method, the community fire-fighting water pipe can be incorporated into the fire-fighting monitoring system, so that the specific situation of fire-fighting water in a community can be mastered, when abnormal phenomena such as water shortage, no water, under-pressure water pressure,leakage and fluctuation of water flow occur to the fire-fighting water, the abnormal phenomena can be found in time, potential safety hazard of the fire-fighting water is completely eradicated, and the safety of the fire-fighting water is ensured.

The invention provides a multifunctional joint junction box for electric energy metering. The multifunctional joint junction box comprises a cover, a base, a base cover and a plug-in tooling, whereinthe base is provided with a current connection terminal and a voltage connection terminal; the current connection terminal is provided with a pressing type detection switch and a plug-in type meter change switch; the current connection terminal is also provided with current connection contacts for connection with a field calibrator; the voltage connection terminal is provided with a pressing typevoltage switch; and the voltage connection terminal is also provided with voltage connection contacts for connection with the field calibrator. The field calibrator can be seamlessly connected into atest circuit by setting the pressing type detection switch, the pressing type voltage switch and a pin-type meter-change switch, and fixing the detection switch, the voltage switch and the meter-change switch to the connection terminal on the base, that is, to a copper bar on the base, wherein the detection switch and the voltage switch can switch the current and voltage circuits during meter checking; the meter-change switch is used to replace the electric energy meter and perform short-circuit operation on an electric circuit.

The invention is applicable to the technical field of power and provides a cable icing monitoring method and system. The method comprises the following steps: detecting a real-time height of the cableby virtue of a sensor, acquiring a current image of the cable by an image acquisition processing device when a corresponding sensor detects that the real-time height of the cable is less than a firstthreshold, and determining an icing thickness of the cable according to the current image; receiving the icing thickness determined by the image acquisition device by an information transfer node, and transmitting the real-time height of the cable, the icing thickness and a sensor identifier to a server when the icing thickness is more than a second threshold; and combining current weather information corresponding to the sensor identifier by the server, judging the icing conditions of the cable, and transmitting judgment results to a maintenance personnel terminal. Therefore, the cable icingconditions can be detected in real time, hidden danger existing in the cable can be discovered in time, and related maintenance personnel can be notified in time.

The invention discloses an elevator remote monitoring system which comprises a collection layer, a transmission layer, a platform layer and an application layer. The collection layer collects elevator state physical data, video data and environment data, and the transmission layer achieves high-speed long-distance transmission of data signals through a power line carrier PLC technology and an optical network. The platform layer is based on a big data platform, a video streaming media platform and a message processing center architecture organization and provides platform support for specific application of the system, and the application layer is related to services, provides application data of departments or units such as maintenance, property management and quality supervision, achieves informatization and intelligent management of elevators and is responsible for intelligent rescue actions. The state of a door and the unsafe elevator taking behaviors and dangerous actions of people are obtained through the collection layer, the real scene in the elevators is completely restored from multiple dimensions in combination with the elevator physical data, so that an effective judgment result is obtained, and the three effects of early warning in advance, pacifying and disposing in the event and tracing after the event on elevator operation are achieved.

The invention discloses a production personnel real-time positioning system, which comprises M groups of positioning equipment, N UWB base stations and a monitoring server, wherein M and N are positive integers; wherein each group of positioning equipment is correspondingly worn by one production person and comprises a UWB positioning terminal and a GPS receiving terminal, the UWB positioning terminal is used for sending out a UWB pulse signal, and the GPS receiving terminal is used for receiving a GPS positioning signal and generating first position information according to the GPS positioning signal; each UWB base station is arranged in an indoor production region and is used for receiving the UWB pulse signal and generating second position information according to the UWB pulse signal;and the monitoring server is used for receiving the first position information and the second position information, and determining a real-time position of the production personnel according to the first position information and the second position information. According to the production personnel real-time positioning system provided by the invention, through combination of a UWB technology anda GPS technology, indoor and outdoor production personnel positioning full coverage is realized.

The embodiment of the invention discloses a remote monitoring and management method of a heat pump and a management platform of the internet of things. The remote monitoring and management method of the heat pump and the management platform of the internet of things are used for monitoring the operation state of the heat pump in real time and obtaining the state data of the heat pump in real time, so that the heat pump can be managed in time. The remote monitoring and management method of the heat pump is applied to the management platform of the internet of things. The management platform of the internet of things comprises the heat pump, a heat pump internet-of-things adapter, an internet-of-things data cloud platform corresponding to the heat pump and an internet-of-things application platform corresponding to the heat pump. The remote monitoring and management platform of the heat pump comprises the steps that the state data of the heat pump are obtained by the heat pump internet-of-things adapter, and the state data are sent by the internet-of-things data cloud platform to the internet-of-things application platform; the internet-of-things application platform generates a control instruction according to the state data; the internet-of-things application platform sends the control instruction to the heat pump through the internet-of-things data cloud platform and the heat pump internet-of-things adapter, and the heat pump conducts corresponding control over the operation state of the heat pump according to the control instruction.

The invention discloses an early-warning board for real-time monitoring of great hazard alarm information of dangerous chemicals. The early-warning board comprises a base board, an early-warning boardbody, a cover, a driving motor, an impeller, a spacing spring, an L-shaped board, a spacing rod, a connecting board, a threaded rod, a handle, a transverse board and a snapping rod. The early-warningboard body is fixed to top of the base board. Insertion slots are arranged at four corners of top of the base board. The cover is arranged above the early-warning board body. Four corners of bottom of the cover are provided with inserting blocks which are fixed. One side wall of the inserting block is provided with a spacing trough. The inserting blocks are arranged in the corresponding insertionslots. The inner wall of the top of the cover is provided with driving motors which are symmetrically fixed. The output shaft of the driving motor is provided with an impeller which is fixed. According to the early-warning board, through arranging the driving motors and the impellers, a relatively high heat radiating effect can be performed. Furthermore through arranging the structures such as the spacing rod, the spacing spring, a pull rod and the threaded rod, convenient detachment of the cover can be realized, thereby facilitating maintenance of the early-warning board body by the people.