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114 results about "Point trigger" patented technology

Method of triggering application service using response filter criteria and IP multimedia subsystem using the same

A triggering method for IP multimedia service control. The triggering method comprises examining a SIP response message received by a S-CSCF according to a set of response Filter Criteria (rFC), and subsequently recording a corresponding SIP request message and re-issuing the SIP request message to an application server designated by the rFC if the SIP response message matches the Service Point Triggers (SPTs) of the rFC. The S-CSCF examines the SPTs of the rFC one by one according to their indicated priority. The rFC scheme is useful when the application servers are triggered according to the SIP response message, and is compatible with the iFC scheme. The rFC scheme of the present invention improves the efficiency for call establishment as well as improving the flexibility of the S-CSCF.
Owner:IND TECH RES INST

System and method for enabling combinational services in wireless networks by using a service delivery platform

Under one aspect, a method of providing combinational services to a user endpoint includes providing a radio access network in communication with the user endpoint; providing a circuit-switched (CS) network in communication with the radio access network, the CS network comprising at least one mobile switching center (MSC) capable of providing a voice service to the user endpoint via the radio access network; providing an IP multimedia subsystem (IMS) core in communication with the radio access network, the IMS core comprising at least one call state control function (CSCF); providing one or more application servers (AS) in communication with the IMS core, the one or more AS capable of providing a corresponding one or more data services to the user endpoint via the CSCF and radio access network; providing a serving node (SN) in communication with the CS network and the IMS core; configuring logic in the MSC to send a first pre-defined message to the SN in response to a trigger detection point (TDP) that is triggered by the user endpoint requesting a voice service or a first entity requesting a voice service with the user endpoint; configuring logic in the CSCF to send a second pre-defined message to the SN in response to a service point trigger (SPT) that is triggered by the user endpoint requesting a data service or by a second entity requesting a data service with the user endpoint; and configuring logic in the SN to receive and respond to at least one of the first and second pre-defined messages by at least one of sending instructions to the MSC to provide a voice service to the user endpoint and sending instructions to the AS to provide a data service to the user endpoint.
Owner:AYLUS NETWORKS

System and method for providing dynamic call models for users as function of the user environment in an IMS network

Systems and methods for providing dynamic call models for users in an IMS network. A system and method provisions dynamic call models within an IMS network having a serving call state control function (S-CSCF) for providing session control for user endpoint (UE) devices. At least one user endpoint device (UE) with agent logic, expresses dynamic context of the UE in a message and sends said dynamic context message to a S-CSCF, wherein said dynamic context includes at least a subset of devices that could be used as UEs or associated devices, network connections that terminate or emanate from said devices that could be used as UEs or associated devices, and capabilities of said devices that could be used as UEs or associated devices. S-CSCF logic receives said context message from the UE and constructs a dynamic call model in response thereto, said dynamic call model having filter codes to associate IMS service codes with application servers (ASs) in communication with the IMS network, said ASs being responsive to service point triggers (SPTs) and each AS having service logic to provide a service for a corresponding IMS service code.
Owner:AYLUS NETWORKS

System and method to provide dynamic call models for users in an IMS network

Systems and methods for providing dynamic call models for users in an IMS network. A system and method provisions dynamic call models within an IMS network having a serving call state control function (S-CSCF) for providing session control for user endpoint (UE) devices. At least one user endpoint device (UE) with agent logic, expresses dynamic context of the UE in a message and sends said dynamic context message to a S-CSCF, wherein said dynamic context includes at least a subset of devices that could be used as UEs or associated devices, network connections that terminate or emanate from said devices that could be used as UEs or associated devices, and capabilities of said devices that could be used as UEs or associated devices. S-CSCF logic receives said context message from the UE and constructs a dynamic call model in response thereto, said dynamic call model having filter codes to associate IMS service codes with application servers (ASs) in communication with the IMS network, said ASs being responsive to service point triggers (SPTs) and each AS having service logic to provide a service for a corresponding IMS service code.
Owner:AYLUS NETWORKS

Multi-point triggering fixed point tracking monitoring method and system

The method sets a plurality of key monitoring positions in place to be monitored, when no abnormal target occurs in the key monitoring monitor positions, the monitoring system controls the rotation of a horizontal stage to make the cam scanning in turn each position in the place to be monitored; when a testing apparatus in the monitoring system detects an abnormity occurs in one position of the plurality of key monitoring positions, the monitoring system controls the horizontal stage to make the cam performing camera shooting scanning to the key position where abnormity occurs. The monitoring system includes a horizontal stage, a video camera, a testing apparatus and a main control circuit, wherein the main control circuit includes a horizontal stage control circuit a camera control circuit and a single chip; the testing apparatus transmits the testing result to the single-chip in the main control circuit, and then the single-chip controls the horizontal stage and the video camera. The invention has advantages of simple structure, high degree of automation, strong practicability and high efficiency.
Owner:SOUTH CHINA UNIV OF TECH

Mediation system and method for hybrid network including an IMS network

Mediation systems and methods for hybrid networks including an IMS network. A system and method mediates an IMS network having a serving call state control function (S-CSCF) for providing session control for user endpoint (UE) devices with an alternative network to create a hybrid network. A service and corresponding service request code are defined to utilize at least a subset of capabilities provided by said alternative network. The S-CSCF is provisioned to identify and receive an alternative network service request message from a UE, including providing a call model having at least one filter code to associate said alternative network service code with at least one application server (AS) dedicated to serving alternative network service requests, said AS being responsive to service point triggers (SPTs). The AS is in communication with and capable of controlling delivery of at least a subset of services provided by said alternative network. The alternative network is a wireless broadcast network, such as a DVB-H network or a forward link only (FLO) network. The IMS network and S-CSCF and ASs are provisioned to provide two-way transport for interactive services for said hybrid network. The call model for alternative network services is constructed as a dynamic call model.
Owner:AYLUS NETWORKS

A general method of network traffic statistics

The invention belongs to the field of Internet monitoring, and discloses a general network traffic statistics method. The method includes: deploying a monitored point on a web page, and recording the extended information of the monitored point; Trigger sending the extended information and other monitoring information to the server; the server records the extended information and other monitoring information sent from the web page and generates a log file; obtains the required network traffic statistics information according to the log file. Through the present invention, different types of statistical requirements can be efficiently counted, and the statistical data can be quickly and efficiently summarized. In this way, website owners can analyze network traffic data and user behavior data more timely, effectively and clearly.
Owner:北京互动百科网络技术有限公司

Method and system for preventing misoperation of touch screen mobile phone

The invention provides a method and system for preventing misoperation of a touch screen mobile phone. According to the method, touch points triggered on a touch screen are received in real time, and effective touch area values of the touch points are calculated; the calculated effective touch area values of the touch points are compared with touch area threshold values set in advance, if the effective touch area values of the touch points are smaller than the touch area threshold values, the touch screen carries out corresponding operation according to the control instruction triggered by the touch points, or else the triggering operation of this time is restrained, the touch area values of the triggering operation are analyzed according to the difference between the touch area of the faulty trigger and the touch area of the fingers, whether the triggering operation is the faulty operation is judged, if yes, the operation is restrained, and therefore faulty triggering of the touch screen can be effectively prevented. The electric quantity can be effectively saved, accidental increase of information expense can be avoided, and convenience is brought to a user of the touch screen mobile phone.
Owner:HUIZHOU TCL MOBILE COMM CO LTD

View spot triggering method based on explication point in GPS intelligent guide system

A view spot triggering method based on the explication point in a GPS intelligent guide system comprises: collecting and triggering the data correlated with the explication point, acquiring the position, direction and speed information of the current user by a GPS positioning signal processing module. The triggering steps comprise: searching whether all of the explication spots in the scenic zone meeting the triggering requirement according to the preset triggering cycle and the preset triggering radius, selecting an explication spot from the explication spot assembly based on the explication spot selection regulation, searching the view spot not playing the music and relative to the explication spot, selecting a view spot based on the view spot selection regulation and starting the music playing module. The data quantity or work quantity of the collected or mapped data is small. The view spot triggering data can be vectorized which is better than the mode of triggering the zone in an graphics mode. The explication point triggering mode is influenced by the number of the explication point and the triggering radius values, wherein the data quantity is small, the algorithmic complexity is low and the performance is high.
Owner:上海网悠科技有限公司

Valve with temperature activated triggers

There is provided a valve comprising a body, a passageway, a sealing member, a trigger, and a temperature responsive trigger actuator. The passageway is defined by the body, wherein the passageway includes an inlet and an outlet. The sealing member is configured for movement between a closed position and an open position, wherein in the closed position, the sealing member prevents fluid communication between the inlet and outlet of the passageway, and in the open position, the inlet and the outlet of the passageway are in fluid communication. The trigger is configured for movement between a first trigger position and a second trigger position, wherein the trigger cooperates with the sealing member such that, when the trigger is disposed in the first trigger position, the trigger effects interference with movement of the sealing member from one of the open position and the closed position to the other one of the open position and the closed position, and when the trigger is disposed in the second trigger position, the interference effected by the trigger, is removed. The temperature responsive trigger actuator includes a plurality of point trigger actuator portions wherein each one of the plurality of point trigger actuator portions is characterized by a respective shape-changing temperature and is configured such that, for each one of the plurality of point trigger actuator portions, when the temperature of the point trigger actuator portion is below the respective shape-changing temperature, the point trigger actuator portion is disposed in a respective low temperature shape condition, and when the temperature of the point trigger actuator portion is at or above the respective shape-changing temperature, the point trigger actuator portion is disposed in a respective high temperature shape condition. The trigger co-operates with the plurality of point trigger actuator portions such that the movement of the trigger from the first trigger position to the second trigger position is configured to be effected by heating of at least one operative point trigger actuator portion, wherein each one of the at least one operative trigger portion is any one of the plurality of point trigger actuator portions, wherein the heating is sufficient to raise the temperature of each one of the at least one operative point trigger actuator portion above its respective shape-changing temperature.
Owner:EMCARA GAS DEV

Handwriting rendering method, device, interactive intelligent tablet computer, and storage medium

The invention relates to a handwriting rendering method, a device, an interactive intelligent tablet computer and a storage medium, which are applied to the interactive intelligent tablet computer. The method comprises the following steps of: acquiring a touch point; the touch point is a plurality of points triggered by a handwriting event on an interactive intelligent tablet touch screen; calculating a width of the touch point and a skeleton line of the handwriting corresponding to the touch point; determining the outline of the handwriting; calculating the contour line according to the widthof the touch point; obtaining an inflection point in the contour line and generating a Bezier curve corresponding to the inflection point as a smoothed contour line; determining the direction of theBezier curve by the direction of the skeleton line; drawing the handwriting according to the smooth contour. The embodiment of the invention solves the problem that the edge of the drawn handwriting is relatively stiff, and improves the handwriting effect based on an interactive intelligent tablet computer.
Owner:GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1

Connection point triggered scanning for positioning radios

A system for automatically controlling the scanning frequency of a radio based positioning application in a wireless communication device (WCD) based on the connection point information of the WCD. The connection point information may be utilized to identify if the WCD is near a positioning-enabled environment. Scanning may be activated, or the scanning frequency may be increased, when the WCD is in an environment that is served by certain connection points (e.g., connection points located in a city). On the other hand, when the WCD is in an environment that is not served by certain connection points (e.g., a rural area), scanning may be stopped or the scanning frequency may be reduced to conserve power in the mobile device.
Owner:NOKIA CORP

Method for encrypting telephone number

The invention discloses a calling number encrypting method which comprises the following steps: a calling party initiates a calling number encrypting service; a service switching point triggers the service to a service controlling point according to an encrypting special service prefix; the service controlling point switches the telephone number of the calling party into an encrypting number, and returns a message carrying the encrypting number to the service switching point; and during calling connection, the service switching point modifies the original calling telephone number into the encrypting number which is presented to a called party. The telephone number of the calling party can be protected by the calling number encrypting method, and the called party is allowed to conduct various communication with the calling party again at the same time, thereby not only ensuring the convenience of communication of a user, but also guaranteeing the safety of the personal information of the user.
Owner:BEIJING SAMSUNG TELECOM R&D CENT +1

Touch screen coordinates calibration method, device thereof and terminal device

The invention provides a touch screen coordinates calibration method, which comprises the following steps of: setting at least one input sampling region on a touch screen, wherein each input sampling region comprises a plurality of liquid crystal display (LCD) pixel points; obtaining a corresponding first LCD screen coordinate of a first LCD pixel point triggered by clicking the input sampling region by a user within a first period of time; obtaining a corresponding second LCD screen coordinate of a second LCD pixel point triggered by clicking the input sampling region by the user within a second period of time; determining a coordinate deviation value between the first LCD pixel point and the second LCD coordinate pixel point according to the first LCD screen coordinate and the second LCD screen coordinate; and performing touch calibration when the coordinate deviation value is not less than a predetermined coordinate deviation threshold. The invention further provides a touch screen coordinates calibration device and a mobile terminal. With the method, the device thereof and the mobile terminal, the deviated touch screen coordinates can be calibrated in time.
Owner:HUAWEI DEVICE CO LTD

Electric power safety sensation simulation method based on virtual reality

InactiveCN107481570ATo achieve the purpose of safety educationCosmonautic condition simulationsSimulatorsSomatosensory systemControl system
The invention discloses an electric power safety sensation simulation method based on virtual reality, and the method comprises following steps: an experiencer stands on a falling simulation component, a knock head simulation component, a virtual reality visual simulation component and an electric shock simulation component are respectively worn on head, eyes and hands, and the simulation components are connected with a simulation control system in communication manner; the simulation control system starts a preset electric power operation scene program, the experiencer observes a virtual picture of an electric power operation scene in the virtual reality visual simulation component, a plurality of trigger points are preset in the virtual picture of the electric power operation scene, the trigger points are connected with the simulation components, when the experiencer reaches the trigger points in the virtual picture of the electric power operation scene, and the trigger points trigger the corresponding connected simulation components to work through the simulation control system. According to the invention, the advantages of the method comprise: safety risks suffered under different electric power operation scenes can be simulated, the simulation is close to an actual electric power operation scene, and safety education purpose is achieved.
Owner:上海零尘信息科技有限公司

Linkage monitoring method and device of dome camera

The invention provides a linkage monitoring method and device of dome cameras, and relates to the video monitoring technology field. The method includes the following steps: obtaining a coordinate of a preset monitor point when a moving object passes by the preset monitor point and triggers alarming; obtaining multiple preset target dome cameras with a preset covering range containing the preset monitor point; calculating adjusting parameters of the preset target dome cameras on the basis of the coordinate of the preset monitor point and coordinates of the preset target dome cameras; and adjusting the corresponding preset target dome cameras on the basis of the adjusting parameters to monitor the preset monitor point. The coordinate of the preset monitor point and the coordinates of the preset dome cameras are known, so once a certain monitor point triggers alarming, the preset dome cameras can quickly and accurately lock the preset monitor point on the basis of the preset coordinate to record events occurring at the preset monitor point in real time. Moreover, multiple high-altitude dome cameras preset in advance can cover the preset monitor point, so events that occur can be recorded from many angles, and recorded event information is more comprehensive and reliable.
Owner:SHANGHAI LINGSHI COMM TECH DEV

Touch assistant system

The invention provides a touch assistant system. The touch assistant system comprises a touch assistant function module which comprises an auxiliary point and a touch assistant function table, and the auxiliary point serves as an inlet of the touch assistant function table; after the touch assistant function module monitors that the auxiliary point triggers an instruction, the touch assistance function table responds to the instruction and is displayed on a current interface, so that when a user conducts operation on the interface of a certain application program, the user does not need to quit the current program or switch to a desktop and can start other application programs or system functions in the touch assistant function table, operation is convenient and simple, and the touch assistant function table can be used as a system application program compensating for and replacing desktop operation; in addition, because the touch assistant function table integrates frequently-used functions of a desktop system, and therefore infrequently-used functions can be simplified according to requirements of the user, and the touch assistant system meets the individual requirements of the user.
Owner:GUANGZHOU JIUBANG DIGITAL TECH

Zero-crossing triggering circuit based on bidirectional silicon-controlled switch

InactiveCN104505842AAchieve the purpose of automatic tracking and real-time tuning compensationSurge suppressionReactive power adjustment/elimination/compensationReactive power compensationDIACAudio power amplifier
The invention discloses a zero-crossing triggering circuit based on a bidirectional silicon-controlled switch, including an input end for obtaining voltages signals of two ends of a silicon-controlled switch, and an output end for sending a zero-crossing triggering signal to the silicon-controlled switch, wherein a bridge type circuit for performing full-wave rectification on the voltages signals of two ends of the silicon-controlled switch, a first optocoupler for feeding the voltage signals back to a CPU (Central Processing Unit), a second optocoupler for performing level conversion on the voltages signals of two ends of the silicon-controlled switch to generate a corresponding preliminary zero-crossing pulse signal, a comparison amplifier for generating a silicon-controlled zero crossing point triggering signal, a gating element for performing AND on the zero crossing point triggering signal and a capacitor switch triggering signal sent by a process tuning CPU, and a driver for generating a silicon-controlled zero-crossing trigger driving signal are sequentially arranged between the input end and the output end. According to the zero-crossing triggering circuit, the silicon-controlled switch can be turned on by generating the triggering signals at the voltage zero crossing points of two ends of the bidirectional silicon-controlled switch; and the tuning transition process of a system can be stably completed by switching a capacitor in a system tuning process.
Owner:YULIN UNIV

Surge arrester with visual fault indicator

The invention relates to a surge arrester which, in a housing (7), has at least one arrester element (3), a solder-fixed thermal disconnection point (5), which is connected to the arrester element, and a damage indicating device (11) for displaying the fault state, wherein the damage indicating device also queries the state of a thermal disconnection device, in particular a fuse, and presents the possible fault states of the arrester element and of the disconnection device mechanically in an OR combination in a suitable way. Furthermore the thermal disconnection device comprises a movable component, which is fixed by an indicator wire and is released after the melting or destruction of said wire. According to the invention, a guide part (9) for a compression spring (10) is provided on or in the housing, wherein a first spring end acts on the thermal disconnection point directly or indirectly by way of a disconnection plunger or disconnection cylinder, and a second end of the compression spring, opposite of the first end, acts on a slide (8) directly or indirectly by way of a guide ring. Furthermore, the slide is subjected to a force on a first side in the displacement direction directly by a further spring (12) or indirectly by the damage indicating device. The second side of the slide, opposite of the first side, is operatively connected to the movable component of the thermal disconnection device in such a way that it follows the release movement of the movable pin under the action of force from the compression spring. The second side of the slide is designed in such a way that a longitudinal slide movement is able to take place as a result of the force of the further spring with the thermal disconnection point triggered and the component of the thermal disconnection device fixed and also with an unchanged position between the slide and guide part and, furthermore, an ascending movement relative to the guide part is able to take place, with a subsequent longitudinal slide movement, with the indicator wire released, together with the movable component of the thermal disconnection device. The second end of the pressure spring or at least part of the guide ring engages in a cutout or depression in the slide in order to lock the latter and the damage indicating device in the proper state of the arrester.
Owner:DEHN SOHNE GMBH CO KG

Virtual joystick control method and system based on gyroscope as well as medium and equipment thereof

ActiveCN108159685ASmall spaceSmall space required for operationVideo gamesPoint triggerJoystick
The invention provides a virtual joystick control method, a control system and control equipment based on a gyroscope, and a medium. The control method comprises the following steps: detecting an original-point trigger instruction which is formed when an operating key is triggered in real time; setting an original-point state in accordance with the current state of the gyroscope when the original-point trigger instruction is received; and acquiring a variable quantity between the real-time state of the gyroscope and the original-point state, obtaining offset of a virtual joystick. According tothe invention, the gyroscope, in coordination with such operating key as physical keys and the like, can solve a problem on original point well, and the gyroscope, when used for operating and controlling unmanned aerial vehicles, remote control vehicles, electronic games and the like, is quite convenient; in addition, the virtual joystick is small in size and operating space and convenient to carry; and the virtual joystick can be compatible with user terminals such as an existing smart phone and the like, so that an additional virtual joystick is achieved.
Owner:上海感悟通信科技有限公司 +1

User-oriented planned virtual crowd simulation framework

The invention discloses a user-oriented planned virtual crowd simulation framework. The user-oriented planned virtual crowd simulation framework comprises a group, triggers, a motion range limiter and a cloud control end. The group is defined and described by a staff composition module, an activity range module, an objective module and an individual behavior and group behavior module and used for simulation of group behaviors so that simulation of various complex group behaviors is achieved. The triggers comprise the path point trigger, the flow trigger, the time trigger, the speed trigger and other triggers and are used for planning crowd paths and determining path topological information and perceptual information of crowd behaviors. The activity range limiter is used for providing position information of static barriers in the environment. The cloud control end is used for planning optimal paths without congestion for crowds according to the path topological information specified by users and the objective of the group. The user-oriented planned virtual crowd simulation framework has good verisimilitude and real-time performance, high flexibility and convenient and fast operability and can simulate verisimilar virtual crowd behaviors on various scenes according to intentions of the users.
Owner:SOUTHEAST UNIV

Chart granularity adjusting method and device

The invention discloses a chart granularity adjusting method and device, and belongs to the field of data mining. The chart granularity adjusting method includes the steps of obtaining a coordinate of a first point triggered by a user on a chart, obtaining the positions slide and operated by the user in real time, determining granularities corresponding to the positions, obtaining data corresponding to the granularities, keeping the coordinate of the first point in the granularity adjusting direction to be unchanged, and updating data on the chart in real time according to the granularities and the corresponding data. The chart granularity adjusting device comprises a first triggering module, a first obtaining module and a first adjusting module. By means of the chart granularity adjusting method and device, real-tine adjustment and accurate adjustment on the chart granularities are achieved, the granularity adjusting efficiency and the granularity adjusting accuracy are improved, and user operation is simplified.
Owner:HUAWEI TECH CO LTD

Method and system for second trigger of CDMA intelligent network service call

The present invention discloses a method and system to realize second triggering of CDMA intelligent network service call, including the following steps: step S102, the equipment at the service exchange point triggers the pilot service when users initiate calls; step S104, the equipment at the pilot service control point adds number prefixes in called numbers, and sends the called numbers to the equipment at the service exchange point; and step S106, the equipment at the service exchange point routes to the intended equipment at the service exchange point, and the intended equipment at the service exchange point triggers the service according to the number prefixes. The present invention can flexibly configure the system to trigger services onto different service platforms according to the services.
Owner:ZTE CORP

Big data-based expressway secondary accident early warning method and system

The invention discloses a method for early warning of secondary accidents on highways based on big data, which is realized in the following manner: early warning devices are arranged at intervals on highway guardrails, and when an accident occurs, the early warning devices at accident points near the accident site are triggered, and the early warning devices at accident points The location information of the accident site is sent to the monitoring center, and the early warning device at the accident point triggers the adjacent early warning device. Taking the early warning device at the accident point as the starting point, the closer the distance to the starting point, the stronger the early warning signal of the adjacent early warning device. The invention has the advantages of timely discovery of the accident scene, long distance and short time-consuming setting of the early warning device, various setting methods of the early warning device, accurate and timely early warning and cancellation of early warning, higher early warning efficiency and better effect, and can effectively reduce the occurrence of secondary accidents. Possibility of beneficial effects.
Owner:GUIZHOU UNIV

Buried point test method, device and equipment and computer readable medium

PendingCN112148606AAvoid captureSimplify the steps of buried point testingSoftware testing/debuggingSoftware developmentPoint trigger
The invention relates to a buried point test method, device and equipment and a computer readable medium. The method comprises the steps: under the condition that a first operation event is detected,using a preset toolkit to capture a first burying point triggered by the first operation event, wherein the preset toolkit is a burying point test toolkit integrated in target software; and displayingthe burying point data under the condition that the burying point data generated by the first burying point is intercepted by utilizing the preset toolkit. According to the application, the softwaredevelopment kit for the buried point test is embedded in the application program, the buried point is captured based on the software development kit, and the buried point data is collected and displayed, so that data capture is avoided, the buried point test steps are greatly simplified, and the buried point test efficiency is improved.
Owner:JINGDONG TECH HLDG CO LTD

Surge detection method and device

The invention discloses a surge detection method and device, and relates to the technical field of detection. The problems that in an existing artificial surge point judging process, the requirementsfor the professional level and quality of technicists are strict, and surge cannot be accurately recognized, so that safety risk is caused to a unit, and the production efficiency of a compressor is affected are solved. According to the main technical scheme, the method comprises the steps of obtaining surge parameters monitored in real time through a parameter interface, calculating the working state of a current working point according to the surge parameters, and starting an anti-surge valve control system; in the state that a surge line offset coefficient changes, adjusting the working state and the anti-surge valve opening in real time; judging whether or not the adjusted changing condition of the working state reaches preset surge point trigger conditions; if the preset surge point trigger conditions are reached, determining the working point of the current working state as a surge point, and sending a valve opening adjusting instruction to the anti-surge valve control system.
Owner:SHENYANG BLOWER WORKS GRP AUTOMATIC CONTROL SYST ENG

Relay zero crossing point trigger circuit, method and device

The invention discloses a relay zero-crossing trigger circuit, method and device. The relay zero-crossing trigger circuit comprises a zero-crossing detection circuit, a relay circuit, a level detection circuit and a controller. the relay circuit performs corresponding actions according to action signals sent to the relay circuit by the controller; The level detection circuit collects a level change signal of alternating current and feeds the level change signal back to the controller; The controller calculates a time difference between a time point at which the action signal is sent out and atime point at which the level change signal is received, calculates the delay time based on the time difference and the historical delay time; and the time point of sending the action signal to the relay circuit next time is determined based on the time point of receiving the zero crossing point signal fed back by the zero crossing detection circuit and the current delay time, so that the relay istriggered at the voltage zero crossing point, the service life of the relay is prolonged, and the power utilization safety is improved.
Owner:TCL TECH ELECTRONICS (HUIZHOU) CO LTD
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