143results about How to "Easy to grasp in real time" patented technology

The invention discloses an industrial automatic identification and data acquisition platform, which comprises an identifier generation module, an automatic identification module, a data acquisition module, an interface module, a report module and a data analysis and mining module, wherein the identifier generation module is used for generating location identifiers, form identifiers, product identifiers, personnel identifiers, equipment identifiers and accessory identifiers; the automatic identification module classifies and defines identification objects according to types, and comprises license plate identification, location identification, form identification, product identification, personnel identification, equipment identification and accessory identification; the data acquisition module acquires data through automatic identification, and comprises license plate acquisition, location acquisition, form acquisition, product acquisition, personnel acquisition, equipment acquisition and accessory acquisition; the interface module is used for data resource sharing, and comprises an ERP interface, a financial interface, an OA interface and a sales system interface; the report module is used for providing visual data reports for a management layer; and the data analysis and mining module realizes intelligent data analysis on the basis of big data.

The invention discloses an NB-IoT-based wisdom tip water quality monitoring system and method. The system comprises an intelligent monitoring system, a cloud service center, an NB-IoT module and a wisdom tip, wherein the wisdom tip collects to-be-monitored water quality original data, processes the data and transmits the data to the cloud service center through the NB-IoT module; and the cloud service center performs management and analysis on the data and finally transmits the data to the intelligent monitoring system for performing trend prediction and classification processing. The method comprises the steps that the wisdom tip collects the to-be-monitored water quality original data and processes the data by adopting an edge calculation method; the processed data is transmitted to thecloud service center through the NB-IoT module; the cloud service center performs the management and analysis on the data and finally transmits the data to the intelligent monitoring system; and the intelligent monitoring system performs the trend prediction and classification processing on the received data, thereby providing data services for water quality monitoring personnel. The water qualitychange can be correspondingly processed intelligently; and referable processing schemes are provided for the monitoring personnel and field working personnel.

The invention discloses an intelligent warehousing sorting system, a goods shelf and an AGV. The intelligent warehousing sorting system comprises a storage goods shelf body, a carrying goods shelf body, the AGV, an upper computer and controller provided with a human-computer interface, wherein the upper computer is connected with the AGV and the controller in a communication mode; and the carryinggoods shelf body comprises a main goods shelf body which is provided with a plurality of first goods stations used for storing goods. The upper computer is in communication connection with the controller and the AGV to monitor the product information (position, quantity and the like) in the whole course, then the resources (the goods shelf and the AGV) can be reasonably distributed, and the warehousing conveying and sorting efficiency is improved. Product partitioning, centralized goods loading and partitioning unloading are formed, modular and regional management and monitoring of the wholewarehousing are achieved, enterprises can conveniently and comprehensively monitor the process from order making to order finishing, data are obtained fast, the manpower, material resource and time cost of the enterprises are reduced, and intelligent and automatic management and monitoring of the warehousing process are facilitated.

Disclosed in the application is an industrial internet-of-things platform comprising a raw material data acquisition and management system, a production data collection and management system, a sales data acquisition and management system, a storage data acquisition and management system, an equipment material data acquisition, and a quality control tracing collection and management system. The raw material data acquisition and management system consists of a sample extraction report generation module, an initial review report generation module, a recheck report generation module, a raw material warehousing report generation module, and a settlement report generation module. The production data collection and management system includes a raw material link data generation module, a production link data generation module, a finished product package link data generation module, and a finished product link data generation module. The sales data acquisition and management system contains a cargo data management module, a sales contract management module, and a customer data management module.

The invention is suitable for the electronic measuring field and provides a measuring circuit and a measuring device for battery capacity as well as a battery capacity meter. The measuring circuit is connected with a battery BT to be measured by load resistance RL, wherein the measuring circuit comprises current-measuring resistor RS, a clock unit, an analog-digital conversion unit and an integral unit, wherein the current-measuring resistor RS is used for sampling the current I0 on the load resistor RL and outputting simulative sampling voltage; the clock unit is used for generating time base signals; the analog-digital conversion unit is used for conversing the simulative sampling voltage into digital sampling voltage under the control of the clock signals; and the integral unit is used for accumulating the digital sampling voltage and outputting electricity detection signals. The residual battery capacity of the battery can be measured by the current integration so as to improve the measuring precision and the measuring efficiency; the measuring data can be displayed in real time; users can know the residual battery capacity of the battery in real time; and the circuit is simple in structure and low in cost.

The invention belongs to the technical field of sensor detection, and particularly relates to a detection analysis system of fruit freshness and a method thereof; the technical problem solved is to provide the detection analysis system of fruit freshness and a method thereof; the system and the method are comprehensive in data monitoring and analysis, high in intelligence degree of the detecting process, and high in detection efficiency. The technical scheme includes steps of collecting environment parameter influencing on fruit breathing intensity; adjusting the collected environment parameter influencing on fruit breathing intensity; comparing and analyzing the collected data in actual environment with the fruit freshness reference data; acquiring the freshness data of the fruit to be detected and a freshness retaining decision result of the fruit to be detected; storing the reference data of the fruit freshness; displaying the fruit freshness data of the fruit to be detected and the freshness retaining decision result of the fruit to be detected. The invention is applicable to the field of sensor detection.

The invention discloses a system and a method for monitoring the whole process of customer power purchase service. A bypass integrated payment access management platform system proxy server, a prepayment electricity selling system proxy server, a marketing business application system proxy server and an electricity consumption information acquisition system proxy server are built; each proxy server is responsible for detecting system interfaces, logs and database data; the data is analyzed according to the service logic and summarizing the data; an internal memory database technology is used for storing the analysis summary data in a client power purchase whole-process monitoring large number server (D3BASE) in real time, whether a system gives an alarm or not and the alarm influence service range are judged according to the content of an alarm threshold value, an abnormal label library and the like preset in advance, and a WEB application page and a short message interface are provided for a client to be displayed.

The invention provides a vehicle remote monitoring system and method. The vehicle remote monitoring system includes a data acquisition module, a vehicle monitoring center and an intelligent terminal,and the data acquisition module and the intelligent terminal are both connected with the vehicle monitoring center in a communication mode. The method includes the steps: the vehicle monitoring centerreceives and stores vehicle status information collected by each sensor node from the data acquisition module; the vehicle monitoring center receives an identity authentication request sent by the intelligent terminal; the vehicle monitoring center verifies the intelligent terminal according to the identity authentication request; after successful verification of the intelligent terminal, the vehicle monitoring center establishes a communication connection with the intelligent terminal; and the vehicle monitoring center responds to an access request of the intelligent terminal establishing communication with the vehicle monitoring center and provides the operation interface of the stored data to the intelligent terminal establishing communication with the vehicle monitoring center.

The invention provides an operation sample box on the basis of an RF (Radio Frequency) technology, which can enable registration information not to be wrong and not to be omitted and enable a specimen tag not to be stained and identified by mistake in the submitting and packaging process of a specimen, and a submission method thereof. To fulfill the aim, the invention adopts the technical scheme that the operation sample box comprises a box body, a cover body, a touch screen display, an identification module, a power supply module, a data storage module, a data comparison module, a controller, an electronic lock for locking the box body and the cover body, a wireless communication module and an RFID (Radio Frequency Identification Device) electronic tag.

The invention discloses an automatic firefighting control system of a wind turbine generator system. The automatic firefighting control system is characterized by comprising an air-breathing type smoke-sensitive fire hazard detection alarm device, a firefighting monitoring device, an automatic fire extinguishing device and a shared fireproof plugging device, wherein the air-breathing type smoke-sensitive fire hazard detection alarm device comprises an air-breathing type smoke-sensitive fire hazard detector and a sampling pipeline in match; the firefighting monitoring device is arranged in a central control center of a wind power plant; the automatic fire extinguishing device comprises an automatic pulse type dry powder fire extinguishing device and an automatic aerosol fire extinguishing device for achieving total flooding fire extinguishment protection; the special firefighting plugging device is arranged at the connection part of a wind turbine generator system cabin and a tower cylinder. The automatic firefighting control system of the wind turbine generator system can sample at real time, analyze by self and determine the alarm grade automatically, so that working personnel can master the fire hazard progress at real time, accurate and reliable firefighting measures can be taken according to the alarm grade, and due to complete information self-provision and self-analysis capability, the firefighting management can be correctly and orderly executed.

The invention relates to an intelligent soot blowing method for a heat engine plant boiler. The intelligent soot blowing method includes the steps that, (1) according to a set soot blowing strategy, a flue soot blowing demand degree rule and a hearth soot blowing demand degree rule are respectively obtained from an established soot blowing degree expert confidence rule base; and (2) operating data of an on-site boiler are obtained, and compared with rule parameters of the flue soot blowing demand degree rule and the hearth soot blowing demand degree rule, further heating surface soot blowing demand degrees of a flue and a hearth are obtained, and a heating surface corresponding to the soot blowing demand degree rule is subjected to soot blowing when the soot blowing demand degree is bigger than a set demand degree. Compared with the prior art, existing timing soot blowing is changed into soot blowing as required through using the intelligent soot blowing method for the heat engine plant boiler, and the heat absorbing distribution conditions of the heating surfaces at all levels are changed; and the heat absorbing proportion of the heating surfaces at all levels is redistributed to maintain the stabilization of temperature, the utilization of micro-attemperation water is reduced and economy is improved.

The invention discloses a street light monitoring method, comprising the following steps: corresponding relationship between a mobile middleware and one or more street light three remote devices is determined; the street light three remote device transmits a monitoring result to the corresponding mobile middleware via a special data channel; and the mobile middleware transmits the received monitoring result to a mobile terminal. The invention also discloses a corresponding street light monitoring system. The invention provides a technical scheme by which the mobile terminal can obtain a street light monitoring result, that is, the monitoring result can be obtained from the mobile terminal, so that management personnel need not to obtain the monitoring result from a street light centralized monitoring center which is located fixedly and singly, and the operation situation of the street light device can be obtained at any place via the mobile terminal, thus the street light device is controlled, and complexity in street light monitoring is reduced greatly, and a service can be realized conveniently.

The embodiment of the invention discloses an information feedback method and device, electronic equipment and a storage medium. The method comprises the following steps: sending a target control instruction to controlled equipment; judging whether feedback information is received within preset time or not; if so, analyzing the feedback information to judge whether the controlled equipment correctly executes the target control instruction or not; and if the feedback information is not received or it is judged that the controlled device does not correctly execute the target control instruction,executing a preset operation. By receiving the feedback information of the controlled device, whether the controlled device correctly executes the operation of the user is determined, so that the usercan conveniently master the state of the household appliance in real time, and the use experience of the user for the smart home is improved.

The invention discloses a small unmanned aerial vehicle pesticide spraying device based on the Internet of Things. The small unmanned aerial vehicle pesticide spraying device comprises a main shell; one side face of the main shell is fixedly connected with a pesticide storage tank; the surface of the pesticide storage tank is fixedly connected with a pesticide component analyzer; the upper surfaceof the main shell is fixedly connected with a touch operation screen and a positioner located on one side of the touch operation screen; the upper surface of the main shell is fixedly connected witha power box; and one end of the power box is fixedly connected with a rotor wing. The pesticide component analyzer is arranged for detecting component information of pesticides in the pesticide storage tank, a controller records the spraying time through an internally-arranged calendar during pesticide spraying and uploads the pesticide spraying component information and spraying time records to the Internet of Things through a signal transceiver remotely, accordingly, people can master the pesticide spraying information of agricultural products in real time, the pesticide spraying amount of crops can be adjusted in time, and the situation of excessive pesticide spraying or insufficient pesticide spraying of the crops is avoided.

The invention discloses a real-time monitoring and evaluation system and method for soft mattress service status based on distributed optical fibers. During soft mattress service period, a distributedoptical fiber sensor is used for collecting and transmitting physical signals reflecting the deformation and ambient temperature of the soft mattress to an optical fiber interrogator in real time; the optical fiber interrogator is used for receiving and processing the collected physical signals, converting the physical signals into electric signals and sending the electric signals; a wireless transmission module is used for transmitting the electric signals to a terminal computer; the terminal computer is used for receiving and processing the electric signals to obtain deformation informationof the soft mattress; the terminal computer is used for evaluating the service status of the soft mattress based on the deformation information of the soft mattress, and therefore maintenance suggestions are given. According to the method in the invention, the current technical short slab for real-time monitoring and evaluation of the service status of the soft mattress can be filled, the management personnel can master the operation state of the soft mattress in real time, a promotion effect is achieved for inland river intelligent channel construction, and a reference can be provided for the development of inland river channel regulating structure service status intelligent sensing and multi-source information fusion.

The invention discloses a pile hole diameter detection device for engineering management and a control method thereof, the pile hole diameter detection device comprises a top seat and a bottom seat, a first power mechanism and a detection mechanism are arranged between the top seat and the bottom seat, and the first power mechanism can drive the detection mechanism to move up and down between the top seat and the bottom seat; the detection mechanism comprises a movable disc, an annular plate, a second power mechanism, a plurality of telescopic detection assemblies and an abutting roller, the first power mechanism can drive the movable disc to move up and down between the top seat and the base, and the annular plate is rotationally arranged on the periphery of the movable disc. The detection precision can be improved; an operator can accurately grasp the position of the measurement point by combining the height and the radial direction corresponding to the measurement point, so that the subsequent repair operation on the measurement point is facilitated; the automation degree, the operation efficiency and the detection precision are high; and a more stable supporting effect is achieved, the risk that the device topples over is eliminated, and stable and safe use is ensured.

The invention provides a vehicle remote monitor system and method. The system comprises a wireless sensor network monitor module, a vehicle monitor center and a local device, wherein both the wirelesssensor network monitor module and the local device are in communicated connection with the vehicle monitor center. The method comprises steps that the vehicle monitor center receives and stores vehicle state information collected by each sensor node from the wireless sensor network monitor module, the vehicle monitor center receives an identity authentication request sent by the local device, thevehicle monitor center verifies the local device according to the identity authentication request, the vehicle monitor center establishes a communicated connection with the local device after verifying the local device successfully, and in response to an access request of the local device in communicated connection with the vehicle monitor center, the vehicle monitor center provides an operationinterface of stored data for the local device in communicated connection with the vehicle monitor center.

The invention relates to the technical field of automobiles, in particular to an automobile intelligent assistance steering system. The system comprises a CAN transceiver, a steering auxiliary controlmodule, an image collecting module, a distance measuring sensor, an automobile distance judging module and a steering auxiliary control module, wherein the CAN transceiver is used for receiving steering wheel steering state parameters, the steering auxiliary control module is used for editing an image collecting instruction in real time and further used for sending the received image to a displaycontrol module to display the received image; the image collecting module is used for collecting images on the two sides of an automobile in real time, the distance measuring sensor is used for collecting the back automobile distance in real time, the automobile distance judging module is used for comparing a preset alarm automobile distance threshold with the received back automobile distance inreal time; if the alarm automobile distance threshold is met, an alarm broadcast request is generated and sent to the steering auxiliary control module, and the steering auxiliary control module is further used for sending alarm voice prompting information to a voice control module to control a player to play alarm voice. The problem that a driver has automobile back region blind spots when driving an automobile is solved, and steering safety is ensured.

The invention discloses a configuration technology-based railway track circuit and turnout monitoring system. The configuration technology-based railway track circuit and turnout monitoring system comprises a PLC and external circuit module, an OPC server side module, a configuration project module and a preset hearbeat detection program, wherein the PLC and external circuit module comprises a 24Vdirect-current multi-output switch power supply, a PLC and extension I / O module, an external relay and an input switch circuit; the OPC server side module is configured by professional OPC software,is driven by corresponding equipment provided through the OPC software, reads and writes PLC variable and comprises the OPC software and an OPC configuration file; the configuration project module isa graphical module based on configuration software development, is combined with read-write and embedded C script logic program of the OPC server side variable, and comprises a global script module, agraphical interface and configuration as well as a variable configuration module. The configuration technology-based railway track circuit and turnout monitoring system can realize visual monitoringof railway track circuit and turnout, has high configurability and extendibility, and is favorable for supplementing real-time property and visualization of railway track monitoring.

The invention discloses an automatic fire alarm system, and relates to the field of fire alarm systems; the automatic fire alarm system comprises an inspection module, a server, an alarm module, a communication network unit and a mobile terminal; the inspection module and a communication module are based on the communication network unit; wireless sensors comprise a wireless pressure sensor, a wireless temperature sensor and a wireless smoke sensor, and the wireless sensors are used for collecting and monitoring wireless data; the server feeds back the received signals to the alarm module, and meanwhile, the server feeds back the received signals to the mobile terminal; the alarm module comprises a maintenance alarm module and a fire alarm module; the mobile terminal and the communicationnetwork unit are provided. By arranging the inspection module and a state feedback module, so periodic inspection and state reporting are performed on the fire-fighting equipment, and the inspectionresult is fed back to the mobile terminal, so that a user can master the condition of the fire-fighting equipment in real time, and the effects of timely maintenance and safety guarantee are achieved.

The invention discloses an intelligent storage system, which includes a plurality of sensor nodes, an embedded gateway and a monitoring terminal. The sensor node includes a sensing module and a ZigBee terminal; the sensing module includes a temperature and humidity sensor, a combustible sensor, a residual current transformer, Flame detector, first signal conditioning circuit, second signal conditioning circuit and third signal conditioning circuit, ZigBee terminal includes analog-to-digital converter, processor, output port, buzzer, LED indicator light, clock circuit and wireless transceiver The embedded gateway includes a ZigBee coordinator module, a GPRS communication module, the first UART port, the second UART port, an ARM microcontroller module, a display, an SD card and buttons; The wireless sensor network with a topological structure sends the collected monitoring data to the embedded gateway; the gateway uploads the data to the monitoring center through the GPRS network after processing, so that relevant personnel can grasp the on-site situation in real time.

The invention discloses a personalized download interface generation method and system based on big data and a storage medium, and the method comprises the steps: obtaining the identification information of a download task, wherein the identification information comprises a file size, a file name, a file directory and a file type; matching according to the identification information to obtain a preset downloading interface; obtaining personalized data pre-stored by the user, wherein the personalized data comprises a user gender, a user age, a user occupation and a historical use interface of the user; searching a target downloading interface in a big database according to the personalized data of the user; calculating the similarity between the preset downloading interface and the target downloading interface; judging whether the similarity is smaller than a preset threshold value or not, and if yes, displaying a preset downloading interface; otherwise, displaying the target downloading interface. The method is comprehensive in displayed content and high in individuation degree, and can be widely applied to the technical field of computers.

The invention relates to a wellsite remote policy making support system and method. The system comprises a server and a display, wherein the server comprises a storage module, a communication module,a data processing module, a data server module, and a data analysis module, wherein the data processing module is used for performing data processing on initial data information so as to obtain processed data information, the data server module is used for providing a data service corresponding to the processed data information according to an instruction of a remote terminal, the data analysis module is used for analyzing the processed data information and sending an analysis result to the remote terminal, and the display is used for displaying processed data information corresponding to thedata service. The system integrates collection, storage, display and application of wellsite data in one device and is not limited by wellsite network signal difference, and can complete a set of workflow of the wellsite independently; and the system connects the wellsite with users in a base, thereby improving policy making efficiency and working efficiency.

The invention provides pasture water drinking equipment and system having a monitoring function and relates to the technical field of animal husbandry environment engineering. The pasture water drinking equipment comprises a first groove, a second groove, a gas collecting tube, a gas detector, an exhaust fan and an automatic watering device, the second groove is arranged inside the first groove, anotch is formed in one side of the first groove, one end of the gas collecting tube is communicated with the gas detector while the other end of the same is fixedly connected with the edge of the notch, the exhaust fan is arranged at one end, close to the gas detector, of the gas collecting tube, and the gas detector is used for detecting concentration of gas expired by dairy cows. The pasture water drinking equipment can realize functions of providing a water drinking platform, automatically watering and monitoring gas; compared with conventional water drinking troughs, the pasture drinkingequipment is multifunctional, can collect more information of dairy cows and brings convenience to working personnel to master dynamic information of the dairy cows in the process of water drinking soas to formulate better feeding schemes.

The invention provides a machine tool data collection and management platform. The machine tool data collection and management platform comprises a machine tool data collection unit, a machine tool networking management unit, a cutting toolreal-time monitoring unit, a machine tool equipment maintenance and management unit and a quality data management unit, machine tool data are collected throughthe machine tool data collection unit and sent to the machine tool networking management unit, the machine tool networking management unit processes the received data and generates reports and chartsfor machine tool managementby production managers, the cutting tool real-time monitoring unit monitors the state and the remaining life of cutting tools in real time, the machine tool equipment maintenance and management unit provides machine tool equipment information for the productions manager and is allowed to be operated and managed by the productions manager, and the quality data managementunit monitors the quality problem in the product manufacturing process, analyzes quality variation points in the manufacturing process, finds out variation causes and generates analysis reports. According to the machine tool data collection and management platform, intelligentization and centralization of machine toolmanagement are realized.

The invention provides a method for collecting and displaying real-time performance parameters of network devices. The method includes the steps that firstly, IP values of the network devices are initialized, parameter collecting commands are sent to the network devices, the IP value and command codes of the target network device, the starting time of a timer, the timing cycle of the timer and the count value of a counter are returned by the network devices, collecting time of the real-time performance parameters is calculated according to the starting time of the timer, the timing cycle of the timer and the count value of the counter, and eventually the received real-timer performance parameters and the collecting time are correspondingly displayed. According to the method, a certain type of performance parameters, of the target network device, needing inquiring can be collected and displayed, and real-time performance and customizability are improved.

The invention discloses an RFID warehouse management practical training system. The system comprises a shelf position management system, a warehouse execution mechanism system, a cargo cataloguing system, a personnel management system and a counter workstation. The warehouse execution mechanism system comprises a personnel card label, a signed goods label, a door lock control equipment intelligentsafety door, an RFID far-field antenna, an RFID near-field antenna and an RFID ultrahigh-frequency reader-writer. The goods shelf position management system comprises a shelf position collection module, a shelf position arrangement module, a goods statistics module and a shelf position library management module. The system can read and write the electronic tag, record and update the shelf position information of the goods, realize automatic identification and quick checking of the goods and the goods shelf, strengthen circulation statistics of the goods, effectively reduce the wrong shelf rate of the goods and improve the working efficiency of warehouse management personnel.

The invention discloses an automatic control system for a distorted concrete grouting and vibrating device. A grout barrel, a water tank, a grouting device, a vibrating device and a mixing device are mainly arranged in the distorted concrete grouting and vibrating device. The automatic control system is characterized by comprising a grouting control module, a vibrating control module, a cleaning control module, a mixing control module, a device adjusting control module, a password change control module, an input control module and an output display module. The automatic control device is convenient to operate. Work intensity of operators is relieved, work efficiency is improved, and energy is saved. In the grouting period, the single-point required grouting amount and the finished grouting amount can be dynamically displayed, and the operators can conveniently grasp grouting related information in real time. Distorted concrete grouting errors can be controlled within an allowance range, and distorted concrete construction metering and monitoring requirements are met. Grout waste caused by manual construction can be reduced, construction cost is saved, and the automatic control system is of great practical significance in changing the concrete construction process and the like.

The invention provides a two-channel non-contact measurement device of voltage below 1000V. The circuit comprises a sensor, an operational amplifier circuit, a differential circuit, a measuring circuit, a voltage signal observer and a data storing and outputting module. The output end of the sensor sequentially passes through a current circuit, the differential circuit and the measuring circuit and is connected with the input end of the voltage signal observer. The output end data of the voltage signal observer is connected with the input end of the data storing and outputting module. According to the invention, manpower and material resources needed by electrical connection establishing are avoided; a non-contact voltage detection technology is used; the installation process of a voltage acquiring device is greatly simplified; a ZigBee wireless communication module is combined, so that the device has the function of long range, wide range and multi-detection-point wireless remote monitoring and is efficient, visual and the like; a power sector can master the operation state of a low-voltage distribution network in real time; and the device has wide social benefits.

The invention discloses an annular intelligent positioning lock and a remote control system thereof. The remote control system comprises the annular intelligent positioning lock, a smartphone and a server; the annular intelligent positioning lock comprises an annular lock body, a power supply, an SIM card, a satellite positioning module, a controller, a drive device and a lock tongue; the annular lock body is provided with an opening and closing part opened and closed by the lock tongue, the power supply supplies power to the SIM card, the satellite positioning module, the controller and the drive device; the power supply and the annular lock body form a loop, and the turning-on and turning-off operation of the loop can be controlled by locking and unlocking of the spring blot; the satellite positioning module obtains information of the location of the annular intelligent positioning lock in real time, the information is sent to the server by the SIM card, and the smartphone obtains the information of the location from the server; the smartphone sends locking and unlocking signals to the server, the server acknowledges the information and sends the information to the SIM card, the SIM card is in signal connection with the controller so as to control the drive device to lock and unlock the lock tongue; under conditions of abnormal unlocking, power failures and no signal, the server can send an alarm signal to the smartphone.