681 results about "Triggering device" patented technology

The invention discloses a BIM-based hydropower station full life cycle design, construction, operation and maintenance integrated control system, and the system comprises an intelligent sensing layer which integrates 5G + Beidou positioning, a LoRa gateway and a sensor, collects multi-source heterogeneous data in real time, and transmits the multi-source heterogeneous data to a digital twinborn layer after the multi-source heterogeneous data is filtered by an edge node; a digital twinborn layer: constructing a parameterized model library through laser point cloud and BIM automatic registration, integrating a geological parameter dynamic correction algorithm, mapping a construction period stress field in real time, and updating model parameters based on sensing data self-evolution; the intelligent decision-making layer performs equipment fault prediction by using an LSTM neural network, optimizes multi-machine load distribution in combination with an improved PSO algorithm, and automatically adjusts a start-stop strategy when the load fluctuates; and the security execution layer is used for triggering equipment operation after virtual twinborn deduction verification through a block chain evidence storage instruction, realizing virtual-real dual verification in combination with an industrial firewall, and finally feeding back a running state to the sensing layer to calibrate and update a model, and supporting intelligent decision.

The invention provides a highway electromechanical autonomous decision-making method and system based on big data and a knowledge graph, and relates to the technical field of highway traffic intellectualization, and the method comprises the steps: firstly obtaining an operation data set, including equipment state information, environment perception information and operation instruction records, of highway electromechanical equipment in a continuous operation period, and then carrying out the feature extraction of the operation data set; the method comprises the steps of obtaining a key feature set reflecting an equipment operation state, calling a pre-constructed knowledge graph to carry out association analysis on the key feature set, generating decision association information, and determining a current operation state evaluation result and a potential risk prediction result of the highway electromechanical system based on the decision association information. And finally, an autonomous decision instruction for triggering equipment adjustment or resource scheduling operation is generated, so that intelligent and automatic decision of the road electromechanical system is realized, and the operation efficiency and safety of the system are improved.

The invention discloses an energy consumption optimization management method and system for compressed air of an energy storage aquifer, and relates to the field of energy consumption optimization management.The method comprises the steps that an initial adjustment frequency threshold value is set by dynamically selecting regulation and control parameters, the adjustment effect is verified through a model, and equipment maintenance or replacement is automatically triggered when the threshold value is exceeded; the timeliness and the accuracy of exception processing are obviously improved; further setting a monitoring period, circularly executing data acquisition and parameter adjustment, combining real-time monitoring of maintenance cost and working time length data, dynamically optimizing an adjustment strategy and recording historical data when a threshold value is exceeded, and finally constructing a total maintenance cost-working time length mapping model to realize continuous optimization; besides, by introducing a second threshold maximum adjustment frequency and a sensor redundancy mechanism, when the adjustment does not reach the standard, a standby sensor is automatically added, and the optimization process is repeated, so that the reliability of data acquisition and the stability of the system are effectively enhanced.

The invention provides a multi-camera cooperative intelligent early warning method and system for abnormal events, and belongs to the technical field of intelligent security and big data. The method comprises the following steps: collecting video data through a multi-view and multi-type camera, collecting environmental parameters through a sensor, extracting target appearance, motion features and environmental state features by using deep learning after preprocessing, and fusing to construct a multi-modal feature vector; and analyzing and identifying an abnormal event based on the trained abnormal event identification model, determining event information through multi-camera cooperative feature matching and geometric operation, and finally generating early warning information according to a preset strategy and linking the equipment. The abnormal event recognition accuracy and early warning timeliness are improved, and the method is suitable for the field of intelligent security and protection of complex scenes.

A safety circuit for a high-voltage electrical traction system comprising a plurality of electric machines. The safety circuit comprises a primary high voltage interlock loop (HVIL) circuit configured to be connected to a battery and for each of the plurality of electric machines, a secondary high voltage interlock loop (HVIL) circuit, wherein each secondary HVIL-circuit is controlled by a corresponding switch unit configured to break the secondary HVIL-circuit if a fault in a corresponding electric machine is detected, and wherein the switch unit comprises a trigger device configured to break the primary HVIL-circuit if the switch unit is opened.

The invention discloses a cigarette cut tobacco batch production circulation control system and method based on single-point condition judgment, and the system comprises a work order parameter verification module which is used for receiving a work order issued by a scheduling system, and carrying out the work order information integrity verification, process parameter compliance verification and equipment suitability verification; the regular expression configuration module is used for providing a visual interface and configuring a regular judgment rule set of equipment starting conditions, ending conditions and abnormal ending conditions; and the single-point judgment execution mechanism is embedded into the PLC control layer, acquires equipment parameters in real time, dynamically evaluates regular conditions based on a finite-state machine model, and triggers an equipment start-stop instruction. According to the system, the cigarette cut tobacco batch switching time is remarkably shortened, and the work order circulation efficiency is improved; the manual intervention frequency is further reduced, and the misoperation rate is further reduced; and the problem of production interruption caused by disconnection of the equipment state and the process parameters is solved.

The present application belongs to the technical field of aircraft assembly, and provides a device and method for controlling the depth of a counterbore of an engine suspension fastener hole. The device is used in the process of drilling an engine suspension fastener hole and counterbore, and controls the depth of the counterbore. The device is composed of a micrometer, a sensor and a tool holder. The micrometer is fixed on the tool holder, and the end of the micrometer is a flat surface. The working end of the sensor is a half-spherical surface, which can be compressed. The tool holder moves with the deepening of the counterbore depth, so that the end surface of the micrometer and the sensor are in contact and the sensor is compressed. When the compression reaches a certain depth, the sensor triggers, the device stops the counterbore, the tool exits the product, and the assembly part is automatically counterbored to the required size. The present application can automatically control the depth of the counterbore of the assembly part and the part.

The invention discloses a coal blocking prediction and control method and system for a coal conveying and falling pipe based on artificial intelligence, and belongs to the technical field of power plant coal conveying system safety monitoring. Multi-source sensor data such as coal flow density, sound wave frequency spectrum and pressure gradient are fused, and are input into a neural network model after time alignment and feature extraction; a hierarchical risk label is output in combination with an integrated learning algorithm, and the coal conveying equipment is linked to execute hierarchical control including low-risk continuous monitoring, medium-risk speed reduction and intermittent excitation, high-risk emergency jump stop and maximum power rapping; the problems that a traditional single sensor is high in false alarm rate and manual response lags behind are solved, equipment adjustment can be accurately triggered in the early stage of coal blockage, non-planned shutdown is avoided, industrial protocol data frames are packaged through a PLC interface to ensure reliable execution, and the safety and operation continuity of a coal conveying system are remarkably improved.

The invention discloses a DALI equipment dynamic addressing and automatic address configuration method based on a LiFi technology, and relates to the technical field of intelligent lighting. Building a LiFi network and setting a communication protocol; equipment physical deployment and initialization; triggering an equipment discovery mechanism; the device responds to and recognizes interaction; address allocation and conflict detection; address configuration issuing and device activation; and carrying out configuration recording and fault processing. According to the dynamic addressing and automatic address configuration method combining the LiFi technology and the DALI device, the DALI slave device and the main controller are modified to enable the DALI device to have the compatibility of LiFi communication and a DALI protocol, automatic discovery, address allocation and conflict detection of the device are achieved through the LiFi network, the configuration process of a traditional DALI system is optimized, and the configuration efficiency of the DALI system is improved. High-speed data transmission and encryption of a configuration instruction are realized through a LiFi channel, and automatic configuration and stability of equipment are ensured.

The invention relates to the technical field of steel wire rope state detection, in particular to a steel wire rope diameter measuring method and system based on event compensation correction. According to the technical scheme, the system comprises an imaging module, a boundary initial extraction module, a dynamic motion estimation module, a dynamic correction compensation module and a diameter calculation module. The imaging module comprises a traditional camera, an event camera, an optical component, a synchronous triggering device and a spectroscope. The traditional camera is used for collecting frame images of the steel wire rope. According to the method, on the basis of complementary advantages of an event camera and a traditional camera, systematic measurement deviation under the dynamic working condition is solved from the mechanism through an event-driven dynamic geometric compensation model, and quasi-static imaging dependence is broken through. The method does not need extra constraint or increase of frame rate, control cost and hardware complexity, avoids the problems of reduction of signal-to-noise ratio and the like, realizes high-precision stable measurement under high-speed and vibration working conditions, adapts to online monitoring of multiple industrial scenes, and is remarkable in practicability and application value.

A stationary induction charging device configured to inductively interact with a mobile induction charging device of a motor vehicle during a charging operation for wireless power transmission includes a positioning device configured to generate a positioning signal for positioning the mobile induction charging device to the stationary induction charging device. The stationary induction charging device further includes an activation interface configured to at least partially activate or deactivate the positioning device upon receiving a corresponding signal from a triggering device.

The invention provides a pump room scene abnormal state recognition system and method based on video monitoring, and relates to the field of monitoring or monitoring activities, in particular to the field of space perception. The system comprises a synchronous trigger device which is used for synchronously triggering the collection of video data and audio data in a pump room in the same monitoring time interval; and the state identification device is used for intelligently identifying a pump room scene abnormity type by adopting an intelligent scene abnormity identification model on the basis of basic contents obtained by analyzing the video data in the pump room and the audio data in the pump room. According to the invention, in order to solve the technical problem that the recognition precision and efficiency of various specific pump room scene abnormal states cannot be considered at the same time, different intelligent scene abnormal recognition models can be designed for different pump room scenes and multi-modal basic contents screened in a targeted manner are introduced; and various specific pump room scene abnormal state identification is completed, so that the technical problem is solved.

The utility model relates to an animal aerosol preference behavior detection system, and belongs to the technical field of animal behavior detection. The triggering device, the drinking water reward device and the data recording device are arranged in the box body, the at least two aerosol release devices are arranged outside the box body, the triggering device is used for triggering operation of animals, and corresponding effective operation is set for each aerosol release device. The triggering device controls the corresponding aerosol release device to release the corresponding aerosol into the box body when detecting effective operation of the animal and controls the water drinking award device to carry out water drinking awarding on the animal at the same time, and the effective operation of the animal on each aerosol release device is recorded through the data recording device. Therefore, the animal aerosol preference behavior can be detected. Therefore, the animal aerosol preference behavior detection device can effectively detect the animal aerosol preference behavior, and is simple in structure and easy to implement.

The embodiment of the invention provides a power equipment inspection method and system based on Beidou high-precision positioning. The method comprises the following steps: firstly, acquiring a preset inspection task information set (including equipment type identification, an inspection item list and task priority level) and an initial position data set (including geographical coordinate information of each power equipment) of to-be-inspected power equipment; and then calling a path planning module of the Beidou high-precision positioning system to generate a dynamic inspection path containing a path node coordinate sequence and a node access sequence. And according to the dynamic inspection path, guiding an inspector to arrive at the equipment position through the Beidou high-precision positioning terminal and triggering the equipment state data acquisition operation. And then carrying out spatial correlation verification processing on the collected equipment state data set and the path node coordinate sequence. And finally, integrating related information based on an association verification result, and generating a power equipment inspection result report containing equipment position information and state details, thereby facilitating timely discovery of potential problems of the equipment and ensuring safe and stable operation of a power system.

The invention discloses a riding helmet automatic rescue system and method based on multi-source data fusion, and the system comprises a sensor module which is used for collecting automobile state data and riding environment data, and the output end of the sensor module is connected to a data processing unit; the data processing unit is used for receiving the automobile state data and the riding environment data and performing risk assessment according to the received data to obtain an assessed risk level signal, and the output end of the data processing unit is connected to the rescue starting device; the rescue triggering device outputs a corresponding rescue signal according to the received risk level signal, and the output end of the rescue triggering device is connected to the communication module; and after receiving the rescue signal, the communication module sends the rescue signal to an external rescue system and executes a rescue response. The method has the advantages that real-time monitoring, accurate judgment and graded response of riding risks are achieved by means of auxiliary driving and lane early warning technologies through multi-source data fusion and an AI algorithm, and riding safety and rescue efficiency are improved.

Hand wearable support for a bar code scanner comprises back and front sides. The front side includes a V-member, first and second harness straps attached thereto extending away from each other at an angle, and means along the V-member for releasably attaching the front to the back side of the support which further comprises a back of the hand portion, a thumb portion, a trigger attachment portion, and first and second strap attachment portions each including a buckle. The first and second harness straps of the front side include a tongue portion for threading through the first and second buckle and folding back to releasably attach to itself. Releasable attachment of a trigger device, bar code scanner attachment, and bar code scanner to trigger attachment portion, bar code scanner attachment portion, and bar code scanner attachment portion, respectively, forms a bar code scanner assembly in the form factor of a support wearable by a user to perform scanning operations.

The invention relates to the technical field of intelligent traffic equipment, in particular to an induction blind sidewalk brick, a trigger type tactile stick and a blind sidewalk cooperation system. The sensing blind sidewalk brick comprises a blind sidewalk brick body and a sensing device, wherein a cavity is formed in the blind sidewalk brick body; the trigger device is arranged on the blind sidewalk brick body and is used for receiving a trigger signal triggered by short-distance wireless induction; the sensing device is arranged in the cavity and is in signal connection with the triggering device, and the sensing device sends out a warning signal after the triggering device receives the triggering signal; wherein the trigger device is a tactile stick trigger device; a trigger signal triggered by short-distance wireless induction is sent out by the tactile stick. According to the tactile stick, a point-to-point identification relation is established through close-range induction (magnetism, metal and radio frequency), and the effect that the brick responds only when a visually impaired person carrying the tactile stick arrives is achieved; the selective triggering suppresses broadcast flooding caused by scene noise (raindrops, footsteps, baby carriages and the like), so that information fatigue and urban noise pollution are avoided.

The invention belongs to the technical field of underwater measurement systems, and particularly relates to a novel unmanned aerial vehicle mounting type water depth measurement system which comprises an unmanned aerial vehicle platform, a GPS-RTK module, a photographing lens, a detection host, a data transmission line, a depth measurement probe, a data recording trigger device and a ground control station. The GPS-RTK module, the photographing lens and the detection host are all mounted on the unmanned aerial vehicle platform; the detection host is connected with the sounding probe through a data transmission line. Through real-time differential positioning of the GPS-RTK module, centimeter-level positioning precision can be provided, the position accuracy of sounding data is ensured, compared with traditional shipborne GPS positioning, the precision is improved by one order of magnitude, the unmanned aerial vehicle platform is matched to reach water areas where traditional ships cannot reach, such as shoals, narrow riverways and upstream of reservoirs, and the unmanned aerial vehicle platform is matched with the unmanned aerial vehicle platform to reach the water areas where the traditional ships cannot reach. The application range of sounding is greatly expanded, and meanwhile, the hovering capability and the accurate controllability of the unmanned aerial vehicle enable the sounding operation to be more flexible and efficient.

The invention provides a communication fault determination method and equipment, which can be applied to the technical field of communication technology and fault management. The communication fault determination method comprises the following steps: responding to received register error information from a central processing unit, analyzing the register error information to obtain route identification information which is used for positioning error triggering equipment; wherein the register error information is obtained by the central processing unit from a register related to the baseboard management controller based on the target error event; under the condition that the route identification information indicates the out-of-band management service module, determining that the register error information is target communication type information; wherein the substrate management controller, the central processing unit and the out-of-band management service module are connected through a communication link of a target communication type; and determining a communication fault type according to the configuration information of the communication link, and sending the communication fault type to the central processing unit.

The invention discloses a short-stroke handle triggering device, and relates to the technical field of automobile parts, a fixed shell is provided with an extension part, the tail end of the extension part extends in the radial direction of a steering wheel, a handle assembly is installed on the extension part, a part of the handle assembly is exposed out of the extension part, and the exposed part of the handle assembly is used for stirring operation. The handle assembly can rotate around the first rotating shaft relative to the extension part; due to the fact that the extending part of the fixing shell extends in the radial direction, the overall length of the handle assembly is shortened, under the condition that the handle assembly is shifted and rotated by the same angle, the movement distance of the handle assembly driven by the hand is shorter, short-stroke triggering is achieved, and the amplitude of handle swing control is reduced.

A high-speed trigger device disclosed by the present invention comprises an ARM module and an FPGA module, the FPGA module comprises an encoder signal input interface, a high-speed input interface and a high-speed output interface, the ARM module is in communication connection with an upper computer, the ARM module is in communication connection with the FPGA module, and the ARM module is used for receiving parameter instruction information provided by the upper computer and transmitting the parameter instruction information to the FPGA module. The parameter instruction information comprises operation mode configuration information. According to the high-speed triggering device, the architecture that ARM and FPGA are processed separately is adopted, setting of parameter instruction information and the like are processed by the ARM module, counting of triggering signals, output of control signals of the high-speed output interface and the like are processed by the FPGA module, parallel processing is achieved through the FPGA module, the processing logic can be completely achieved by a hardware circuit of the FPGA module, and low-delay triggering is achieved.

The invention relates to the technical field of information security and equipment operation and maintenance, in particular to an intelligent operation and maintenance system and method for USB key equipment based on automatic reconnection and remote wakeup, and the system comprises the USB key equipment which is used for storing key information and executing encryption authentication operation; the operation and maintenance management platform is used for performing remote monitoring, state management and operation and maintenance instruction issuing on the USB key equipment; the communication module is used for establishing communication connection between the USB key equipment and the operation and maintenance management platform; the automatic reconnection module is configured to automatically initiate a reconnection request to recover the connection when the communication connection between the USB key equipment and the operation and maintenance management platform is interrupted; and the remote awakening module is configured to receive an awakening instruction of the operation and maintenance management platform and trigger equipment awakening when the USB key equipment is in a dormant or offline state. The problems that connection is unstable and offline equipment cannot be managed and controlled in operation and maintenance of traditional USB key equipment are solved, and intelligence and high efficiency of operation and maintenance are improved.

The invention discloses a real-time risk monitoring and decision collaboration method for an edge intelligent terminal, and particularly relates to the field of industrial Internet of Things security monitoring and edge computing. The method comprises the following steps: collecting monitoring sub-region data through a multi-edge intelligent terminal, and calculating a local risk value; when the local risk value exceeds a threshold value, marking as a first edge intelligent terminal and broadcasting a collaboration request; the response edge intelligent terminal returns self risk data; the first edge intelligent terminal generates a final risk level through a weighted fusion algorithm according to a decision weight distribution strategy, and queries a rule base to generate a collaborative decision instruction; and sending a control instruction to the associated terminal based on the instruction, triggering equipment shutdown or data encryption operation, and feeding back an execution state. Through edge terminal localization calculation and collaborative decision, the problems of high response delay and high single-point fault risk of a centralized architecture are solved, millisecond risk response is realized, and the system stability and decision accuracy are improved.

The invention relates to a target electromagnetic scattering test supporting method combining a metal support and a foam support, and relates to the field of electromagnetic scattering testing. A ground rotary table is used for bearing a target and supporting a structure to do azimuth rotation; the metal support and the foam support are combined to support a target, and the pitching angle of the target can be adjusted by adjusting the height of the foam support. The metal support rotating equipment rotates the metal support, so that the lowest electromagnetic scattering direction of the metal support is always aligned with the antenna, and the test influence is reduced; the pulse triggering device provides pulse signals for the metal support rotating device based on the rotating position of the ground rotary table to serve as reference for direction adjustment, and the method has the advantages that background clutters are reduced while the attitude and orientation of the to-be-measured target are accurately controlled, and the target erection safety is improved.

The invention provides an active lightning triggering device and method for a fan blade. The device comprises two copper rods with tip heads, a protection circuit, a boost lightning circuit and a metal shielding net. The two copper rods are arranged in parallel at the blade tip of the fan blade, one copper rod is directly grounded, and the other copper rod is connected with the boost lightning circuit through the protection circuit; the boost lightning guide circuit comprises a charging capacitor, an inductor, a high-frequency switch and a diode and is used for sensing positive high voltage and dynamically adjusting resonance characteristics so as to enhance voltage difference between thundercloud and a copper rod and trigger uplink and downlink leader to form a discharge channel; the metal shielding net wraps the blade tip and is connected with the grounding device to ensure that lightning current is preferentially discharged through the copper rod, and the blade tip structure is prevented from being damaged. According to the method, environmental meteorology and blade attitudes are monitored in real time, a boosted circuit is started in combination with threshold judgment, and control parameters are optimized by using a remote monitoring platform, so that intelligent lightning protection management is realized. According to the device, by actively exciting corona discharge and accurately guiding a lightning path, the lightning protection efficiency of the blade is remarkably improved, the damage risk of a non-lightning-receiving area is reduced, meanwhile, a maintenance decision is supported through datamation operation and maintenance, and the device is suitable for wind generating set protection in a thunderstorm area.

The invention provides a one-way action speed limiter, an elevator system and a one-way speed limiting control method of the elevator system, and relates to the technical field of elevators. The one-way action speed limiter comprises a rope wheel, a main shaft, a selection transmission device, a centrifugal device, a lock hook device and a brake trigger device. The rope wheel and the centrifugal device are installed on the main shaft, and the rope wheel is used for winding a steel wire rope connected with an elevator car. One-way selection transmission from the rope wheel to the centrifugal device through the main shaft is achieved through the selection transmission device, one end of the lock hook device is connected to the brake trigger device, the other end of the lock hook device is matched with the centrifugal device, and the brake trigger device is released when the centrifugal device is enough to drive the lock hook device to unlock at the one-way operation speed. Therefore, the one-way speed limiting function can be achieved, and the method is particularly suitable for ascending and descending differentiated speed limiting of an elevator system.

A brake system for a transportation vehicle having a brake device for braking a wheel of the transportation vehicle, an actuator device for targetedly actuating the brake device, a control device for controlling the actuator device, and an emergency brake device for braking the wheel in response to a malfunction of the transportation vehicle. The emergency brake device has an energy store for storing energy for actuating the brake device and a triggering device for releasing the stored energy in the energy store to actuate the brake device, the triggering device releases the energy store in response to a failure of an on-board electrical system of the transportation vehicle. Also disclosed is a method for operating a brake system and to a transportation vehicle having such a brake system.

The invention discloses a lithium battery thermal runaway early warning and shock wave collaborative dry water suppression system. The system comprises a heat dissipation structure outer cover arranged outside a lithium battery in a covering mode and an explosion scattering device wrapping the outer cover. A sliding rail is arranged on the inner wall of the outer cover and slidably connected with a bottom heat dissipation plate. The outer cover and the bottom heat dissipation plate are made of flame-retardant materials, and heat dissipation holes are evenly formed in the outer cover and the bottom heat dissipation plate. Temperature alarm devices are arranged on the outer cover and the bottom heat dissipation plate, a smoke alarm device is arranged at the position, located above the lithium battery, of the outer cover, the explosion scattering device is filled with dry water, a deformation alarm device is arranged on the outer wall of the explosion scattering device, and the temperature alarm device, the smoke alarm device and the deformation alarm device are integrally connected with the trigger device. When any two of temperature, flue gas and deformation are detected to be abnormal, the explosion scattering device can be activated to explode, and dry water uniformly covers the surface of the lithium battery. The system is high in universality and safe and reliable to use, thermal runaway of the battery is inhibited physically and chemically, detonation of the battery is prevented, and the use safety of the battery is greatly improved.

The utility model relates to fire control detection technical field, and disclose a kind of smoke alarm remote triggering device for fire detection, including protective cover, the inside of protective cover is installed with smoke alarm, the outer edge of smoke alarm is installed with smoke making storehouse, the inside of smoke making storehouse is opened with cavity, the inner bottom of cavity is installed with heating pipe, the inner wall of cavity is connected with thread ring with thread, the top of thread ring is installed with pressing plate, the inner wall of pressing plate is installed with extension ring, the bottom of extension ring is opened with four recesses;By smoke alarm, it can be remotely controlled heating pipe operation to heat the smoke oil inside cavity, further can generate smoke, so that smoke can be discharged to the inside of protective cover through smoke exhaust pipe, and can be directly sprayed outside smoke alarm, for actively triggering smoke alarm to carry out smoke detection, without manually igniting combustible to produce smoke, more environmentally friendly.

The application relates to an auxiliary casting mold device for cast steel forming of a mine dump truck, which comprises a ventilation device composed of a ventilation pipe, a pressure regulating box and an air inlet box, and a fixed mold frame for cast steel forming; the upper port of the pressure regulating box is communicated with the lower port of the air inlet box; the ventilation pipe is provided with a ventilation triggering device at the end; an adjusting pipe is slidably connected in the air inlet box; the adjusting pipe is a pipe structure with a contraction in the middle and expansion at both ends; the application utilizes the pressure change caused by the contraction and expansion positions of the adjusting pipe by the cooling airflow to adjust the pressure in the pressure regulating cavity, and further adjusts the suction process of the ventilation pipe to the gas in the fixed mold frame; on one hand, the gas in the fixed mold frame is timely sucked into the pressure regulating cavity to avoid the residual gas in the fixed mold frame; on the other hand, after pouring is completed, the liquid cast steel material in the ventilation pipe is re-pressed into the fixed mold frame to reduce the loss of the cast steel material.