376results about How to "Reduce frequency" patented technology

The invention discloses a key value storage system indexing method oriented to an NVM-NVMe SSD (Non-Volatile Memory-Non-Volatile Memory Express Solid State Disk) hybrid architecture, which comprises the following steps of: constructing a heterogeneous storage architecture taking cold and hot data perception as a core driving mechanism, coordinating and managing two types of storage media, namely a non-volatile memory NVM and a solid state disk NVMe SSD, and realizing efficient identification, layered writing and dynamic migration of cold and hot data. According to the method, the characteristics of low delay, durability and byte addressing of the NVM are utilized, the frequency and I / O overhead of Flush and Compaction operations are reduced in a data write-in path, meanwhile, the problem of mixed storage of cold and hot data is avoided, and therefore the overall performance and storage efficiency of a system are remarkably improved. In addition, by introducing an asynchronous migration module, the method can dynamically adapt to the change of data popularity along with time evolution, and effectively support high performance and high availability of the key value system in long-term operation.

The invention discloses an alloy smelting batching scheme generation method and system, particularly relates to the technical field of metal material production and supply chain collaborative optimization, and is used for solving the problems of uncontrollable execution, cost waste and quality risk caused by disconnection of static parameters and a dynamic supply chain in an existing batching scheme. The method comprises the following steps: acquiring target alloy component demand parameters, raw material inventory allowance and purchase cycle parameters; identifying a dynamic constraint key material with a supply interruption risk; establishing a dynamic constraint model containing an inventory safety buffer threshold based on the historical consumption volatility; candidate batching schemes are generated through multi-level optimization; verifying inventory performability and compatibility of alternative material components; sorting and outputting the effective schemes according to the cost and inventory suitability; through supply chain risk quantification and dynamic constraint modeling, the feasibility of a batching scheme is remarkably improved, and production halt loss and potential quality hazards caused by supply interruption or blind substitution are reduced.

The invention discloses a high-stability weighing sensor based on self-adaptive structure adjustment, relates to the technical field of weighing sensors, and aims to solve the technical problem that the sensor bears unbalance loading force due to the fact that the placement position of an object is deviated, and the high-stability weighing sensor comprises a fixed base and a resistance strain type weighing sensor fixedly installed at the top of the fixed base. An adjusting mechanism is arranged at the top of the fixed base, and a stabilizing mechanism is arranged at the top of the adjusting mechanism. According to the invention, the floating seat is connected with the bearing seat through the spherical universal joint, and when a weighing object is placed at the edge of the bearing seat and causes unbalance loading, the spherical universal joint can actively adjust the posture of the bearing seat through inclination, and the L-shaped elastic arm at the unbalance loading side is matched to generate tiny bending due to increased stress; in the force transmission process, the first arc thin connection section can deform through self elasticity, interference of transverse component force on the main elastic body is eliminated, and the problem that the sensor bears unbalance loading force due to the fact that the placing position of an object is deviated is solved.

The application relates to the technical field of wireless products, in particular to a wireless product frequency calibration method and a wireless product frequency calibration system thereof. When a test calibration board detects that a DUT product starts a radio frequency end and stably works, a stable square wave signal output by a high-frequency crystal oscillator is acquired, a pulse width test is carried out in response to a PC host computer instruction, an actual crystal oscillator frequency is obtained, an absolute radio frequency deviation is calculated according to the actual crystal oscillator frequency and is uploaded, the PC host computer judges whether the absolute radio frequency deviation exceeds a pre-warning limit value, if the absolute radio frequency deviation exceeds the pre-warning limit value, a target crystal oscillator absolute frequency deviation value is reversely calculated and is issued, the test calibration board generates a first standardized compensation value, and the DUT product frequency deviation is retested according to the first standardized compensation value, and the absolute radio frequency deviation after the retest is less than a qualified limit value. The application realizes efficient and accurate calibration.

The utility model provides a kind of monitoring system of photolithography machine internal environment, comprising: photolithography machine;Air circulation air outlet located in the photolithography machine inside;Particle detection device located at the air circulation air outlet, for real-time monitoring the particle contaminant inside the photolithography machine and generating detection data;Data sending module is electrically connected with the particle detection device, for accepting the detection data and real-time transmission to external monitoring equipment;Real-time monitoring and data real-time transmission to photolithography machine internal environment particle contaminant are realized.This enables operator to promptly understand photolithography machine internal air quality condition, provides strong guarantee for the stable performance of photolithography process, improves the automation level and operating efficiency of entire photolithography machine.

This invention provides an ink mixing device for a packaging box printing machine, relating to the field of ink processing technology. The ink mixing device for the packaging box printing machine includes a mixing tank and a bottom tank; it also includes a drive motor, the output end of which is connected to a pressing mechanism and a reciprocating mechanism. The pressing end of the pressing mechanism is connected to a piston, which moves within a metering mechanism. An adjustment mechanism for metering is also provided on the outside of the metering mechanism. Inside the mixing tank, a stirring assembly and a scraper are provided for ink mixing. The stirring assembly and scraper are driven by the drive motor. The reciprocating end of the reciprocating mechanism is connected to a scraper ring for scraping the inner wall of the mixing tank. This invention achieves coordinated operation of metered ink delivery, efficient mixing, and automatic tank wall cleaning by simultaneously driving the pressing mechanism, stirring assembly, and reciprocating mechanism with a single drive motor, effectively reducing equipment energy consumption and structural complexity.

The invention provides a multifunctional roundness measuring instrument for a mute ball bearing, which relates to the field of measuring instruments, and comprises a workbench, and a rotating support is rotatably connected to the left side of the top end face of the workbench; the transmission chuck is rotationally connected to the upper side of the inner end of the rotary support. The two driving auxiliary frames are arranged on the outer side of the rotating support in a left-right alignment and sliding mode. The positioning auxiliary mechanism is arranged between the driving auxiliary frame and the transmission chuck; the movable optical shaft is slidably connected to the right side of the top end face of the workbench. The movable bracket is arranged outside the movable optical axis in a vertical sliding manner; the fine adjustment bracket is hinged to the outer side of the lower end of the movable bracket; the protection auxiliary mechanism is arranged between the fine adjustment support and the sliding support, automatic clamping and positioning of the bearing are achieved, the frequency and workload of repeated labor of operators are relieved, and the positioning efficiency and the measuring efficiency of the bearing are improved; the problems that the repeated labor frequency and workload of operators are increased, and the positioning efficiency and the measuring efficiency of the bearing are affected are solved.

The utility model discloses a particle steel hot press forming device which comprises a working table, a stand, a hydraulic cylinder and a guide hopper, the stand is connected to the top end of the working table, the hydraulic cylinder is arranged on the stand, a telescopic rod is vertically downward, and the bottom end of the hydraulic cylinder is connected with a pressing block. The rotating mechanism is used for driving the rotating disc to rotate, one pressing groove is filled with materials when passing through the lower portion of the material guiding pipe, the pressing groove is pressed when passing through the lower portion of the hydraulic cylinder, after rotation continues, when the pulley rolls on the protruding block, the pulley jacks the top plate upwards, the top plate pushes out pressed particle steel, and continuous circulation is achieved. The particle steel hot-pressing efficiency is improved, during material filling, the driving mechanism continuously drives the material guide pipe to rotate, the probability and frequency of blockage are greatly reduced through rotation of the material guide pipe, the requirement for shutdown cleaning is reduced, and the continuous operation time and reliability of equipment are improved.

The utility model discloses an automatic feeding device for a dyeing pool, which comprises a pool body, a fixing frame is arranged on one side of the pool body, a plurality of tank bodies are transversely arranged on the fixing frame, a collecting part is arranged below the tank bodies, a vibrator is arranged outside the collecting part, and an electromagnetic valve opening is arranged at the lower end of the collecting part. The automatic feeding device has the following advantages and effects that the problem that the powdery dye is easily clamped at the outlet can be reduced through the automatic feeding device, so that a large amount of powdery dye can be fed into the tank body at one time, the adding frequency is reduced, and the burden of workers is reduced. Meanwhile, errors caused by dye proportioning can be avoided, and the dyeing quality is guaranteed.

The invention belongs to the technical field of pest monitoring, early warning, prevention and control, and particularly relates to a pest trapping device convenient for dosing and pest collection, which comprises a box body, a cover plate, a rotary switching device and a trapping container, the cover plate is connected to the box body; a mounting inner cavity is formed in the box body; the box body is provided with an insect collecting pipeline and a trapping channel which are communicated with the mounting inner cavity; a dosing channel communicated with the inner cavity is arranged in the cover plate; the trapping container comprises a first container and a second container; the rotary switching device is connected to the interior of the box body and is connected with the first container and the second container; an insect collecting inner cavity is formed in the first container and / or the second container; an insect collecting pipeline is further arranged on the box body; and during insect collection operation, the insect collection pipeline is communicated with the insect collection inner cavity. According to the invention, excessive investment of manpower and material resources can be reduced, the problem of inconvenience in dosing and insect collection caused by a specific monitoring environment is solved, and the convenience and efficiency of trapping can be improved.

The application discloses an intelligent dust removal device for waste gas treatment of a coal-fired power plant, and relates to the technical field of waste gas treatment.The device comprises a dust removal box, an air inlet fixedly connected to the side wall of the dust removal box, a filter plate fixedly connected to the inside of the dust removal box, and a filter effect real-time detection mechanism and a dust cleaning and collecting mechanism.The device can reduce unnecessary troubleshooting and maintenance frequency, thereby reducing maintenance cost and time cost, and can maintain or replace the clogged or damaged filter plate in time when the filter plate is damaged, so that the continuous and efficient operation of the spray dust removal system can be ensured, and the overall operation efficiency is improved.Further, the device can avoid long-time use of the filter plate without timely maintenance or replacement, so that impurities and particulate matter can be prevented from entering the spray dust removal system, the cleanliness of water resources is ensured, and the overall performance of the spray dust removal system is improved.

This utility model belongs to the field of concrete construction equipment, specifically relating to a concrete trowel. It includes a frame located above a segment mold. Linear guide rails are mounted on both sides of the frame, with a linear motor and a sliding cover mounted on each rail. Mounting beams are mounted on the linear motors and sliding covers, and a cylinder is mounted above the mounting beams. A slider is mounted on the output end of the cylinder and is mounted on the mounting beams. A connecting rod is connected to the slider, and a trowel plate is hinged to the other end of the connecting rod. A cleaning component is provided on one side of the segment mold, including a cleaning groove with guide edges on both sides. The trowel plate is mounted on the guide edges. A lead screw is installed inside the cleaning groove, and a drive motor is located outside the cleaning groove. The output shaft of the drive motor is connected to the lead screw, and a cleaning block with scraping grooves is mounted on the lead screw. The purpose of this utility model is to provide a concrete trowel that solves the problem of residual concrete on the trowel plate after use, which affects the subsequent troweling effect.

The utility model discloses a snap ring punch for a combined die casting machine, which comprises a supporting seat, a plurality of snap rings are sleeved on the outer wall of the supporting seat, through grooves are arranged at four corners of the outer wall of the supporting seat, limit grooves are arranged among the through grooves, limit blocks are slidably connected in the limit grooves, built-in jacking pipes are fixed on the inner sides of the limit blocks, and the built-in jacking pipes are fixed on the outer wall of the supporting seat. A square penetrating groove is formed in the position, corresponding to the through groove formed in the supporting base, of the built-in jacking pipe, a fixing clamping block is slidably connected into the through groove of the supporting base, a pushing block is fixed to the inner side of the fixing clamping block, and a driving piece is arranged at the top end of the supporting base. When the snap ring is installed, the built-in jacking pipe can move upwards through thread meshing of the round rod and the built-in jacking pipe only by horizontally placing the supporting base, sleeving the snap ring and rotating the connecting base, then the fixed clamping block is driven to be inserted into the clamping groove of the snap ring, rapid assembly is completed, and compared with a traditional snap ring installation mode, the assembling steps are remarkably reduced, and the operation time is remarkably shortened.

The invention relates to the technical field of water treatment, discloses an intelligent flocculant adding method and system based on water quality dynamic data, and aims to solve the technical problems that an existing adding mode is extensive, lagged in control and difficult to adapt to dynamic water quality fluctuation. The method comprises the following steps: collecting turbidity and flow data of a water inlet end; carrying out feedforward prediction by utilizing a long-short-term memory network model, calculating a theoretical dosage and driving a metering pump to execute; and the effluent turbidity is monitored in real time, and feedback correction is performed by using a PID algorithm. The system comprises an online monitoring unit, an intelligent control unit, a precise adding execution unit and an effect feedback unit. Through composite control of feedforward prediction and feedback correction, advanced and accurate addition of the flocculant is realized, the drug consumption cost is reduced, the impact load is effectively dealt with, and the stability of the effluent quality and the intelligentization of system operation and maintenance are ensured.

The utility model provides a built-in counter weight aerator which comprises an air chamber, a supporting aeration pipe and a built-in counter weight pipe, the two ends of the supporting aeration pipe are respectively communicated with the air chamber, the two ends of the air chamber are sealed through end cover plugs, the built-in counter weight pipe is arranged in the air chamber through the end cover plugs, and the built-in counter weight pipe is arranged in the air chamber. The diameter of the built-in counter weight pipe is smaller than that of the inner wall of the air chamber, an air inlet channel is formed between the built-in counter weight pipe and the inner wall of the periphery of the air chamber, the two ends of the supporting aeration pipe are communicated with the air inlet channels of the air chambers at the two ends respectively, a counter weight mounting sleeve is arranged on the side, located in the air chamber, of the end cover plug, and the axis of the counter weight mounting sleeve coincides with the axis of the air chamber. The two ends of the built-in counterweight pipe are arranged in the air chamber through counterweight mounting sleeves respectively. According to the technical scheme of the utility model, the structure is simple, the counterweight effect is good, the occupied area and the volume of the aerator cannot be increased due to the built-in counterweight, the arrangement density of the aerator cannot be influenced, the use and maintenance cost is low, and the aerator is suitable for popularization and application in aeration devices.

A method for assembling a hair cutting appliance is presented. The body is provided with a power switch connected to a power source. A drive system within the body is in selective electrical communication with the power source. The cutting unit is electrically connected to the drive system. An optical sensor is mounted to the body to sense a predefined skin-hair edge. A control circuit within the body is electrically connected to the optical sensor. The switch element is electrically connected with the control unit. The switching element is switchable between a conductive state and a non-conductive state by the control circuit. The switching element is switched to a non-conductive state when the sensing condition of the optical sensor exceeds a first pre-programmed threshold. A first pre-programmed threshold is stored in the control circuit. A method for assembling a power conversion module for use with a hair cutting appliance is provided.

This utility model provides an automatic sawing device for automotive castings, belonging to the field of casting riser sawing devices. It includes a machine room with a material drop chute at the bottom, within which a conveyor is installed; and a sawing assembly located on the inner rear side of the machine room. This utility model, through its separation shell, separation plate, and drive assembly, can collect falling structural parts and flowing cooling water during the sawing process of automotive castings. The cooling water is then discharged through a water trough on the separation plate and collected in a water collection tank through separation holes. After water separation, the structural parts fall after the separation plate is removed, enter the material drop chute, and are conveyed out of the machine room by the conveyor. This minimizes the problem of contaminating the conveyor when removing the sawn structure, improves the service life of the conveyor structure after long-term use, and reduces the frequency of conveyor belt cleaning.

The utility model provides a kind of water-based ink production stirring mixing equipment of high efficiency processing, it is related to ink production stirring technical field, including support, stirring barrel is installed on the support, vertical fixed mounting is installed in the one side of support, mounting box is provided on the stand, rotation is provided with the shaft on the mounting box, driving mechanism is provided in the mounting box, the driving mechanism is connected with the shaft and drives the rotation of the shaft, the shaft rotation is installed in the mounting box, the shaft is provided with scrape and stir component, the scrape and stir component is arranged in the stirring barrel.The utility model is scraped by stirring paddle and bottom scraper collaborative work, while stirring ink, the material deposited in the bottom of barrel is scraped, prevent the material of barrel bottom from long-term accumulation and affect mixing uniformity.Ladder type arrangement's side wall scraper covers the full height of barrel wall, effectively removes the ink attached on barrel wall, avoid material waste, prevent ink residue and lead to equipment corrosion.

The application relates to a ventilation and dehumidification device. The device comprises a shell, a ventilation assembly, a cylinder, a dehumidification assembly and a water storage tank. The shell is provided with an air inlet and an air outlet; the ventilation assembly is arranged in the shell and is used for forming an air flow from the air inlet to the air outlet; the cylinder is connected with the outer side wall of the shell; the dehumidification assembly is arranged in the cylinder and is used for converting water in air into liquid water; and the water storage tank is connected with the side wall of the shell and is communicated with the cylinder. The dehumidification assembly is arranged in the cylinder, the humidity of surrounding air can be reduced, the cylinder and the shell are connected, the dehumidification assembly and the ventilation assembly are integrally arranged, the dehumidification assembly and the ventilation assembly are convenient to assemble and disassemble, and in addition, compared with the case that the water storage tank is not arranged, more liquid water converted by the dehumidification assembly can be stored through the water storage tank, the frequency of water drainage operation is effectively reduced, and the complexity of the water drainage operation is reduced.

The invention discloses a variable topology system dynamics recursion grouping method based on graph theory description, and belongs to the field of spacecraft dynamics. The implementation method comprises the following steps: automatically calculating a cyclic dimension based on a graph theory algorithm, matching non-tree edges, generating pseudo nodes, and converting a ring-containing structure into a connected ring-free tree structure; multi-module topology automatic continuation: through a node number continuation method, automatically identifying repeated nodes, deleting redundant description and splicing new module topology, and realizing topology unified description of multi-module assembly; according to the method, a dynamic model is automatically grouped, manual derivation is not needed, a constraint equation is described by a body-pseudo body recursive relationship, a unified recursive relationship of rigid body-rigid body, flexible body-flexible body and rigid body-flexible body connection is combined, modal parameters are automatically called, a grouping matrix is generated, and the dynamic equation is output, so that automatic modeling updating can be realized. According to the method, automatic dynamic grouping of the variable topology system can be realized, dynamic reconstruction is avoided, and characteristic analysis and attitude control of an on-orbit assembly system are facilitated.

The utility model provides a turning chipping collecting device which comprises a main machine, a material receiving groove is formed in one side of the main machine, an extrusion pipe is fixedly connected to the inner side of the main machine, the extrusion pipe and one end of a discharging through hole are formed in the main machine, an extrusion assembly is slidably connected into the extrusion pipe, and one end of the extrusion pipe is fixedly connected with a filtering assembly. The filter assembly comprises a drainage groove, a filter cartridge and an adjusting gear ring, the drainage groove is formed in the lower side of one end of the extrusion pipe, one end of the filter cartridge is rotationally connected to the outer side of the extrusion pipe, and the inner side of the adjusting gear ring is fixedly connected to one end of the filter cartridge; one end of the adjusting gear is meshed with the adjusting gear ring; turning chippings are compressed through the extrusion assembly, meanwhile, cooling liquid flows out through the drainage groove, the chippings are filtered in the extrusion pipe through the filter cylinder, efficient separation and compression of the chippings and the cooling liquid are achieved, and the treatment efficiency is improved.

The application is suitable for the technical field of laser radar, and provides a laser radar, which comprises a light source, a transmitting module, a receiving module, a transmission module, a detecting module and a signal processing module; the transmission module comprises a first coupler and a plurality of transmission media, wherein the local oscillator beam is transmitted to at least one transmission medium for delay processing through the first coupler, and the delay amount of the at least one transmission medium is different from that of the other transmission media; the detecting module is connected with the transmission module and the receiving module respectively, is used for receiving the echo signal and the delayed local oscillator beam output by the transmission module, performing beat frequency processing on the echo signal and the delayed local oscillator beam to obtain a beat frequency signal, and converting the beat frequency signal into a detecting electric signal; and the signal processing module is electrically connected with the detecting module, is used for determining a to-be-measured object according to the detecting electric signal. The laser radar provided by the application can improve the strength of the detection signal in long-distance measurement.

The utility model discloses a drainage outlet prevents blocking auxiliary device, including box and base, and the base fixedly connected in the below of box, the water level monitor is installed to the side of box, and the anti -blocking cleaning mechanism is installed on the box and base, and the anti -blocking cleaning mechanism is opened and closed through the water level monitor linkage, and the anti -blocking cleaning mechanism includes the cleaning plate of plane rotation installation, and the cleaning plate is installed to the corresponding drainage outlet floor drain position, and the plane rotation of cleaning plate can clean the cover surface of drainage outlet floor drain, and the utility model discloses the principle of rising of water level in drainage ditch after the opening of drainage outlet block, and the water level monitor can real -time monitoring drainage ditch water level situation, and when the water level is too high, opens the starting anti -blocking cleaning mechanism, and through the movement of cleaning plate to take off the plug of drainage outlet floor drain, to dredge the drainage outlet, the utility model discloses have the advantages such as automatic starting, practicality is good, after applying the utility model, the drainage ditch blockage rate greatly reduces, and the frequency of through artificial to intervene drainage ditch also significantly reduces.

The utility model relates to the technical field of water-soluble fertilizer stirring devices, and discloses a water-soluble fertilizer raw material multi-stage spiral stirrer which comprises a stirring barrel, and a cover plate is movably clamped at the top end of the stirring barrel; a stirring assembly is arranged at the bottom end of the cover plate, the stirring assembly comprises a stirring main shaft and a plurality of groups of stirring auxiliary shafts, and stirring blades are fixedly mounted on the outer wall surfaces of the stirring main shaft and the stirring auxiliary shafts; the second-stage stirring unit comprises a second-stage stirring main shaft and a spiral blade; and the driving assembly comprises a first gear, a second gear and a transmission part. A stirring assembly, a stirring main shaft and multiple groups of stirring auxiliary shafts are matched with stirring blades to stir water-soluble fertilizer raw materials in a stirring barrel cavity, the stirring range is wide, a secondary stirring unit is arranged, a secondary stirring main shaft is matched with spiral blades to stir the raw materials at the bottom end in the stirring barrel cavity, the raw materials are thrown upwards, and the raw materials are prevented from sinking to the bottom; the stirring efficiency of the equipment is further improved.

The invention relates to the technical field of radars, and discloses an FMCW laser radar ranging method, device and equipment and a storage medium, and the method comprises the steps: receiving an echo signal reflected by a target object; performing frequency mixing on the echo signal and the local oscillator signal to obtain a frequency mixing signal; generating a target reference signal based on the mixing signal and the initial control signal; performing phase-locked amplification on the frequency mixing signal based on the target reference signal to generate a detection amplitude, and determining the distance between the target object and the laser radar and the position of the target object based on the detection amplitude; and generating a PID control signal as a new initial control signal based on the position of the target object, and returning to the step of receiving the echo signal obtained by reflecting the laser signal emitted to the target object. By dynamically generating the target reference signal, the adaptive capacity to targets with different distances is improved, high-precision distance measurement in a complex detection environment is realized through phase-locked amplification, and meanwhile, the flexibility and dynamic adaptability of the laser radar are enhanced through dynamic distance measurement.

The utility model discloses an adjustable saddle tool of a reaction kettle, which belongs to the technical field of tool equipment and comprises a base, two groups of support components are arranged on the base, and a support space is formed between the two groups of support components; the base comprises an adjustable connecting plate, and a plurality of first adjusting holes are formed in the adjustable connecting plate; each supporting assembly comprises a plurality of adjusting supporting mechanisms, and each adjusting supporting mechanism comprises an upper connecting plate, a lower connecting plate and a reaction kettle supporting plate; the reaction kettle supporting plate is provided with an arc-shaped supporting face facing the supporting space, the upper connecting plate is located on the upper side of the lower connecting plate and connected with the reaction kettle supporting plate, the upper connecting plate is provided with a second adjusting hole, the lower connecting plate is provided with a connecting hole, and the connecting hole corresponds to the first adjusting hole and the second adjusting hole in position; the adjusting supporting mechanisms in the same supporting assembly are overlapped up and down and are adjustably connected, and the lowest adjusting supporting mechanism is adjustably connected with the adjustable connecting plate so as to adapt to the reaction kettles with different diameters.

This invention relates to the field of vehicles, providing a housing structure, a rear bumper assembly, a vehicle body, and a vehicle. The housing structure includes a housing body with a receiving groove for accommodating a pressure relief valve on a rear side panel. The housing body can be positioned on the outside of the rear side panel of the vehicle, and an exhaust passage communicating with the pressure relief valve is formed between the receiving groove and the rear side panel. The exhaust passage has an exhaust port facing the rear end of the vehicle. When the vehicle is in motion, the airflow outside the vehicle bypasses the housing body and flows towards the rear end of the vehicle. Since the exhaust port of the exhaust passage faces the rear end of the vehicle, the airflow outside the exhaust passage passing through the exhaust port causes minimal pressure changes within the exhaust passage, resulting in minimal pressure differential fluctuations between the exhaust passage and the inner side of the rear side panel. This effectively reduces the frequency and amplitude of the pressure relief valve's flapping action, thereby reducing low-frequency noise generated by pressure differential fluctuations in the acoustic cavity and ensuring passenger comfort.

The application provides a multi-section shield propulsion risk visualization monitoring method and system, which comprises the following steps: dividing a project into different sections, dividing each section into work points, setting basic information of each work point and corresponding shield machine information for each work point in each section, adding corresponding risk point information for each work point in each section, uploading monitoring results of each work point in each section, associating each work point in each section with corresponding GIS, BIM model and KML drawing, configuring a corresponding view with adjustable model display effect for each work point in each section according to the associated GIS, BIM model and KML drawing of the work point, and displaying the risk. The application has the advantages of supporting multiple projects, multiple sections, visualization, automation, view control, result management and the like, and can improve the efficiency and effect of shield propulsion risk management.

The utility model provides a wheel disc type scraper structure and a harvester. A wheel disc type scraper structure comprises a machine frame, a guide supporting wheel, a scraper disc welding part and a scraper, the guide supporting wheel is rotationally installed on the machine frame, the scraper disc welding part is installed on the machine frame, the scraper disc welding part is arranged on the peripheral side of the guide supporting wheel in a surrounding mode, and the scraper is installed on the scraper disc welding part. Soil seedling stems attached and wound on the wheel surface of the guide supporting wheel are extruded and removed by the scraper. The problems that in the operation process, the guide supporting wheels are stuck due to the fact that the guide supporting wheels are attached and wound by soil and seedling stems, and the conveying belt deflects, slips and is abraded are solved. And through low-cost structural optimization, the manual impurity removal frequency and the working intensity are reduced, and the tomato harvesting operation intensity is improved.