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252 results about "Operating speed" patented technology

The operating speed of a road is the speed at which motor vehicles generally operate on that road. The precise definition of "operating speed", however, is open to debate. Some sources, such as the AASHTO, have changed their definitions recently to match the common use of the word. In 1994, the AASHTO Green Book defined the operating speed as "the highest overall speed at which a driver can travel on a given highway under favorable weather conditions and under prevailing traffic conditions without at any time exceeding the safe speed as determined by the design speed on a section-by-section basis," a definition which a majority of US states still use. In July 2001, however, the AASHTO revised their definition for the new edition of the Green Book and defined it as "the speed at which drivers are observed operating their vehicles during free-flow conditions."

Prevention of unpowered reverse rotation in compressors

InactiveUS20060222510A1prevent reversalrule out the possibilityFluid parameterOscillating piston enginesDrive motorAir conditioning
The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.
Owner:CARRIER CORP

Group train tracking operation optimization method considering communication delay

The invention discloses a group train tracking operation optimization method considering communication delay. The method comprises the following steps: establishing a heavy haul railway train group of a'navigation-front train following 'topological structure; a multi-target optimization model is constructed according to the characteristic constraint, the speed limitation and the safety distance constraint of the vehicle; generating a random communication delay in the model, calculating a time step number corresponding to the delay, and making a control decision on the following train based on state information of a previous time step of the preceding train; and solving the running speed of the following train in the multi-objective optimization model based on a particle swarm algorithm. According to the group train tracking operation optimization method, the problems of uncertainty and dynamic response lag caused by communication delay in the tracking operation process of heavy haul railway group trains are effectively solved, the tracking error between the trains can be remarkably reduced, the speed synchronism is improved, and the tracking operation efficiency is improved. And the distance fluctuation in the acceleration and deceleration stages can be effectively reduced, so that the train distance stability is ensured.
Owner:CENT SOUTH UNIV +1

Testing device and method for testing performance of elevator speed governor

The invention relates to a test device and method for testing the performance of an elevator speed governor, and the device comprises a test rack which is internally provided with a lifting channel for testing; the main rope is hung and wound on the traction machine; the undercarriage is arranged on one side of the traction machine and connected to the main rope, and the car frame is arranged below the undercarriage and connected with the undercarriage through a detacher; the counterweight frame is arranged on the other side of the traction machine and is connected to the main rope; the speed limiter is arranged at the top of the test rack; the rope gripper is arranged at the top of the test rack; and the data acquisition unit is used for acquiring the running speed of the lift car frame, the wheel speed of the speed limiter, the lifting force of the speed limiting rope, an electrical action signal and a mechanical action signal. The performance of the speed governor can be tested under the working conditions that the lift car frame freely falls when running at a rated speed and the lift car frame falls downwards at different accelerations in a static state.
Owner:GUANGDONG INST OF SPECIAL EQUIP INSPECTION

Entrance ramp motorcade afflux method based on reinforcement learning

The invention discloses an entrance ramp fleet confluence method based on reinforcement learning, and the method comprises the steps: carrying out the scene modeling according to an actual scene, and designing a plurality of fleet scales and vehicle speeds; vehicle acceleration and deceleration are designed as action selection, and the running speeds of main road vehicles and ramp vehicles are changed, so that the ramp vehicles select proper confluence opportunities; the change of the total travel time reflects the motorcade afflux efficiency, a reward function is established according to the change of the vehicle speed, the change of the time headway and the queuing waiting time of a ramp vehicle on an acceleration lane, an action mask is designed to improve the training efficiency, an intelligent agent is trained by using a PPO algorithm, and a trained deep reinforcement model is taken as a vehicle afflux model. The method gives consideration to the better passing efficiency of the main line and the shorter queuing waiting time of the vehicles on the ramp, enables the passing of the main line to be smoother, reduces the waiting time of the vehicles on the ramp as much as possible, and reduces the interference on the main line caused by the convergence of the vehicles on the ramp.
Owner:BEIJING UNIV OF TECH

Oil emulsification prevention control method for gas compressor of urban rail vehicle

The invention relates to an oil-proof emulsification control method and system for an air compressor of an urban rail vehicle, and solves the problem of lubricating oil emulsification caused by insufficient working efficiency of the air compressor and environment humidity change by constructing a comprehensive control system comprising the compressor, an oil-proof emulsification device and a controller. The system monitors lubricating oil temperature and environment humidity in real time through a temperature sensor and a humidity sensor; the working rate of the air compressor is accurately calculated, wherein the vehicle operation time t2 takes the operation speed larger than 10 km / h as the calculation starting point; the controller comprehensively judges whether the oil-proof emulsification device is started or not based on temperature, humidity and working rate data, and the control strategy comprises the step of dynamically adjusting the working rate judgment node according to the real-time temperature and humidity. According to the method, accurate and reliable control over the oil-proof emulsification process is achieved, emulsification of the lubricating oil is effectively prevented, and energy consumption and maintenance cost can be reduced.
Owner:CRRC NANJING PUZHEN CO LTD

Virtual coupling station track departure scene marshalling method, device and equipment and medium

The invention relates to the technical field of rail traffic, in particular to a virtual coupling station track departure scene marshalling method, device and equipment and a medium. After each train in the virtual coupling group train crosses the transponder group, periodically sending a message packet 1 containing train distance information to the ground equipment; after the front train of the virtual coupling group train leaves the station, the front train receives a message packet 2 which is sent by the ground equipment and contains the converted distance information; wherein the converted distance information and the train distance information of the next train are based on the same reference object; and the front vehicle sends the converted distance information to the rear vehicle, and throat area grouping is completed. Through a train-ground-train communication mode, the ground equipment converts the position of the rear train into the position which can be identified by the front train and forwards the position to the front train, so that marshalling of the two trains is accelerated. Marshalling can be carried out in advance in the throat area, after marshalling succeeds, the rear vehicle can be controlled according to the driving permission of the following vehicle, and the running speed and the running efficiency are improved.
Owner:CHINA SHENHUA ENERGY CO LTD +1

Starting vibration system of paver and control method

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.
Owner:XCMG CONSTRUCTION MACHINERY CO LTD ROAD MACHINERY BRANCH

Power-driven hybrid traffic flow energy consumption carbon emission dynamic estimation method based on space-time diagram network

The invention discloses an electric hybrid traffic flow energy consumption carbon emission dynamic estimation method based on a space-time diagram network, and the method comprises the steps: building a directed graph structure of a selected road network, constructing a dynamic adjacency matrix based on real vehicle travel data, and obtaining the dynamic space correlation between road segment nodes under the directed graph structure; establishing an input-output sample set under a directed graph structure of a road network based on the collected real road, traffic flow, running speed, air temperature and relative humidity; and constructing a traffic flow-operation-energy consumption / carbon emission response relation model, training the model by using an input-output sample set, and realizing energy consumption and carbon emission dynamic estimation under different traffic flow inputs by using an optimal model obtained by training. According to the invention, a method for dynamically estimating the energy consumption and the carbon emission of the classified vehicles at different space-time positions under a standard road network diagram framework is created, and the method has better replicability for different regions.
Owner:NANJING UNIV OF POSTS & TELECOMM

Method and device for dynamically adjusting speed of RGV shuttle vehicle according to load weight

The invention relates to the field of RGV shuttle vehicle control, in particular to a method for dynamically adjusting the speed of an RGV shuttle vehicle according to the load weight. The method comprises the steps that S1, the load weight of the RGV shuttle vehicle is obtained; and S2, on the basis of the load weight, the RGV shuttle vehicle is endowed with the maximum running speed. And S3, based on the maximum running speed, calculating a speed curve of the RGV shuttle vehicle by using a five-section S-shaped speed curve algorithm. The speed curve comprises an acceleration-acceleration stage, a deceleration-acceleration stage, a constant speed stage, an acceleration-deceleration stage and a deceleration-deceleration stage. And S4, the RGV shuttle vehicle is controlled to move through the speed curve. According to the method, the load weight is detected when the operation task is executed every time, the proper maximum running speed is matched for the RGV shuttle vehicle, then the speed curve of the RGV shuttle vehicle is calculated through the five-section S-shaped speed curve algorithm, and therefore the running stability of the RGV shuttle vehicle is improved on the premise that the running efficiency of the RGV shuttle vehicle is maximized.
Owner:POTEVIO LOGISTICS TECH

Speed measuring device for elevator detection

The utility model provides a speed measuring device for elevator detection, which relates to the technical field of elevator detection and comprises a mounting plate, and the top of the mounting plate is provided with two insertion grooves. When the running speed of an elevator is detected through the speed measuring device, vibration can be generated during running of the elevator car and transmitted to the mounting plate, meanwhile, under the action of a limiting plate, the speed measuring device and the mounting plate can be driven to move up and down, and under the action of a compression spring and a second damper, the speed measuring device and the mounting plate are driven to move up and down. According to the elevator speed measuring device, vibration borne by the mounting plate and the speed measuring device can be partially absorbed or eliminated, and then the vibration borne by the mounting plate and the speed measuring device can be further absorbed or eliminated under the action of an arc-shaped plate, a sliding block, a buffer spring and a first damper, so that the accuracy of an elevator running speed detection result by the speed measuring device is improved; and an electronic component in the speed measuring device is protected, so that the electronic component is prevented from being damaged due to long-time vibration.
Owner:HEFEI SPECIAL EQUIP SAFETY SUPERVISION & INSPECTION INST (HEFEI ELEVATOR SAFETY INFORMATION CENT)

Expressway lane level guiding method and device under agglomerate fog condition

The invention provides an expressway lane level guiding method and device under an agglomerate fog condition, and the method comprises the steps: obtaining a visibility value and the driving information of a vehicle in real time for the vehicle which is about to drive into an agglomerate fog burst section and is passing through the agglomerate fog burst section; a vehicle operation safety speed estimation model under the low-visibility condition is adopted to estimate and obtain a vehicle suggested operation speed and a safety vehicle distance which guarantee vehicle operation safety; determining the running safety level of the vehicle by adopting a vehicle running safety judgment model under different visibility conditions; and executing a corresponding vehicle management and control strategy on the vehicle, and carrying out multi-mode cooperative lane-level driving safety active induction on the vehicle, so that the vehicle i safely and efficiently passes through the agglomerate fog burst section. Accurate intervention and active guidance of the road traffic flow operation state are achieved through the photoelectric technology, road section front early warning and lane-level active guidance under the agglomerate fog condition are achieved, and the road vehicle operation safety and the road passing efficiency are effectively improved.
Owner:YUNNAN COMM INVESTMENT & CONSTR GRP CO LTD +2

Railway crossing control system, method and apparatus, and storage medium

The present invention relates to the technical field of rail transit. Disclosed are a railway crossing control system, method and apparatus, and a storage medium. The system comprises: a speed measurement and distance measurement device, which is used for acquiring the real-time speed of a train and the real-time distance from the train to a crossing on the basis of the real-time signal strength and the real-time signal strength change rate of a detection signal; and a central device, which is used for determining a target crossing closure notification position by means of a pre-trained train operation state prediction model on the basis of the real-time speed of the train and the real-time distance from the train to the crossing, generating crossing closure information and sending the crossing closure information to a crossing device, and generating a train movement permission and sending the train movement permission to an onboard device. In the technical solution of the present embodiment, a crossing closure notification position is determined on the basis of the real-time speed of a train and the real-time distance from the train to a crossing, such that a crossing closure occasion can be automatically determined on the basis of the real-time running speed of the train, the distance from the crossing closure notification position to the crossing can be shortened, the crossing closure occasion is delayed, and the transportation efficiency on a railway side and a road side can be improved.
Owner:CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD

Magnetic levitation traffic positioning and speed measuring method and system based on modular tooth socket plate

The invention discloses a magnetic levitation traffic positioning and speed measuring method and system based on a modularized tooth groove plate, and the method comprises the steps: detecting a signal of the modularized tooth groove plate through an eddy current sensor, the modularized tooth groove plate is formed by arranging metal sheets sealed by an insulating material according to a rule, the width of the metal sheets is fixed to be 1, and the position where the metal sheets are located is teeth; the groove width between the adjacent teeth is a specified multiple of l; calculating the running speed of the train according to the waveform time difference of the signals output by the at least two eddy current sensor coils at fixed intervals; carrying out absolute position coding through different tooth groove width ratios to obtain a train absolute position ID; matching line basic data information according to the train absolute position ID, wherein the line basic data information comprises turnout, ramp or curve information; and outputting the speed, the absolute position and the line basic data information to a train control system so as to adjust a train dynamic operation control strategy. According to the invention, the stability and comfort of train operation are effectively improved, and the cost and complexity of the system are reduced.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD

Highway network traffic flow carbon emission estimation method fusing multi-source data

The invention discloses a highway network traffic flow carbon emission estimation method fusing multi-source data. The method comprises the following steps: S1, carrying out multi-source data fusion and target road section traffic flow database construction; s2, classifying vehicles on the target road section of the expressway; s3, investigating and surveying and calibrating vehicle energy consumption of different types and different fuels; s4, obtaining energy consumption correction coefficients at different operation speeds through testing; s5, energy consumption correction coefficients under different road conditions are obtained through test training, and energy consumption correction coefficients under different road conditions are obtained through LightGBM training; and S6, estimating the carbon emission of the target road section of the expressway in specific time. According to the method, the highway target road section traffic flow database is constructed, the information data of the vehicle type, the fuel type, the interval speed and the road attribute of the target road section are extracted, and the highway road section estimation model is constructed and trained; and the accuracy and the reliability of the carbon emission calculation of each road section of the expressway network reach the quick estimation of an ideal level.
Owner:GUANGZHOU TRANSPORTATION RES INST CO LTD +1

Crawler antiskid control method, system, equipment, medium and product

The invention discloses an anti-skid control method, system, equipment, medium and product for a tracked vehicle, and relates to the field of anti-skid control, and the method comprises the steps: collecting the running speed of a track, the speed of the tracked vehicle, the rotation angular speed of a chain wheel, the output torque of the tracked vehicle and the disturbance quantity of the tracked vehicle in real time; according to the running speed of the crawler, the speed of the crawler and the rotation angular speed of the chain wheel, the real-time slip rate is determined; according to the output torque of the tracked vehicle, the running speed of the track and the rotation angular speed of the chain wheel, the optimal slip rate is determined; according to the real-time slip rate, the optimal slip rate and the disturbance quantity of the crawler, an active disturbance rejection control strategy is adopted, and a driving adjusting signal is obtained; according to the driving adjusting signal, the output torque of the crawler is adjusted, and the crawler is prevented from sliding. According to the invention, an active-disturbance-rejection control strategy is adopted, and the adaptability and stability of the crawler are improved based on a rapid and dynamic anti-skid control method.
Owner:HUNAN UNIV OF SCI & TECH

Pallet fork lifting control method

The invention discloses a pallet fork lifting control method. The method comprises the following steps that 1, the load weight and lifting control parameters of a pallet fork are obtained; step 2, inputting a target height; 3, calculating a difference value between the actual height and the target height; 4, judging whether the difference value is smaller than a parking deviation allowable value or not, if yes, ending lifting control, and if not, executing the step 5; 5, judging whether the difference value is smaller than a low-speed deviation allowable value or not, and if yes, setting the low-speed positioning speed as the target speed and executing the step 7; if not, executing the step 6; 6, judging whether the difference value is smaller than the deceleration starting distance, and if yes, setting a target speed according to the height deviation; if not, setting the full-speed running speed as the target speed and executing the step 7; and 7, the pallet fork acts according to the target speed. According to the method, the actual speed, the arrival rate and the precision of fork stroke tail end positioning are obviously high, and the environmental adaptability is high.
Owner:ANHUI HELI CO LTD

Highway low-carbon route design method and device based on ecological speed control and medium

The invention belongs to the technical field of vehicle emission control, and particularly relates to a highway low-carbon route design method and device based on ecological speed control and a medium. The method comprises the following steps: collecting plateau road vehicle operation and CO2 emission data through a real vehicle test; a road section CO2 accumulated emission prediction model based on a DistilBERT framework is constructed; identifying a speed square difference as a key influence factor by using Sobol sensitivity analysis; adopting Bayesian optimization to formulate ecological speed control strategies of different working conditions, and setting a speed square difference critical value; and finally, the strategy is applied to identify and optimize the high-emission linear unit in a route design stage, and the running speed coordination is improved. According to the method, the light-weight large model and ecological speed control are deeply fused for the first time, the problems of accurate prediction of vehicle carbon emission and active carbon control at the front end of route design in the plateau complex environment are solved, and the purpose of reducing the carbon emission in the operation period from the road alignment source is achieved.
Owner:SICHUAN HIGHWAY PLANNING SURVEY DESIGN AND RESEARCH INSTITUTE LTD +1

Multi-sensor combined train detection method and system, medium and program product

The invention discloses a multi-sensor combined train detection method and system, a medium and a program product, and the method comprises the steps: collecting optical feature data and acoustic feature data; calculating the running speed of the train; determining corrected optical feature data and corrected acoustic feature data; optical feature sequences and acoustic feature sequences of the train head, the train middle and the train tail are determined; extracting vehicle head contour structure features, compartment connection structure features and vehicle tail contour structure features; extracting train starting acoustic features, a wheel and steel rail impact sound spectrogram and train braking acoustic features; determining an optical feature recognition result; determining an acoustic feature recognition result; and according to the weights corresponding to the optical feature recognition result and the acoustic feature recognition result, calculating to obtain a train type recognition result. According to the method and the device, the accuracy of train type identification in severe weather is improved, and the accuracy and the real-time performance of railway transportation scheduling are further improved.
Owner:ROYAL POWER WUHAN CO LTD

Motor power management method based on EMB product performance improvement

The invention belongs to the technical field of vehicle motor control, and particularly provides a motor power management method based on EMB product performance improvement, and the method comprises the steps: dividing the bus voltage of a motor into a plurality of intervals, and dividing the operation speed of the motor into a plurality of operation intervals from a low speed to a high speed, the bus voltage and the running speed of the motor respectively correspond to different motor bus voltage calibration quantities and motor rotating speed calibration quantities; calculating an offset compensation value of the external characteristics of the motor through the motor bus voltage calibration quantity and the motor rotating speed calibration quantity at the corresponding moments; and performing offset compensation on the T-N external characteristics of the motor by using the calculated offset compensation value of the external characteristics of the motor. A motor rotating speed calibration look-up table is introduced to be combined with a motor bus voltage calibration look-up table, the offset offset value of the external characteristics of the motor is recalculated, a T-N curve of the external characteristics of the motor generates offset, the bus current of the motor is within an expected range, meanwhile, the external characteristics of the motor reach the maximum, and therefore the TTL time of an EMB product can be shortened.
Owner:SUZHOU COORDINATE SYST INTELLIGENT TECH CO LTD

Method, device and equipment for determining an oil pump system

The application discloses a kind of determination methods, device and equipment of oil pump system, belong to vehicle technical field.Method includes: obtaining the acceptable noise value of each driving position in each vehicle speed and each frequency of first vehicle;Obtain the noise attenuation of each driving position in each frequency;Determine the required noise value of first vehicle to oil pump system in each vehicle speed;Obtain the noise value emitted by reference oil pump system in each speed and each frequency;Determine the required operating speed of first vehicle to oil pump system in each vehicle speed;Based on the minimum operating speed of first vehicle to oil pump system in each vehicle speed is not greater than the required operating speed of first vehicle to oil pump system in each vehicle speed, determine that reference oil pump system is the oil pump system of first vehicle.The method makes the determination mode of oil pump system diversification, higher flexibility, and the matching degree of first vehicle is higher, and the noise of oil pump system is smaller when running, improves the driving comfort.
Owner:CHERY AUTOMOBILE CO LTD

Method for adjusting the operating speed of sanitation vehicles based on garbage coverage rate and sanitation vehicles

This invention discloses a method for adjusting the operating speed of a sanitation vehicle based on garbage coverage rate, and a sanitation vehicle itself. The method includes the following steps: acquiring image data within a preset area in front of the vehicle; preprocessing the image data, including dynamic ROI delineation, image enhancement and denoising, and brightness normalization; using a deep learning model based on YOLOv5s to detect garbage in the preprocessed image and outputting target boxes for the coverage area; calculating a two-layer coverage rate based on the target detection results and the Otsu threshold segmentation method, combined with color features, and outputting the current garbage coverage rate; and adjusting the operating speed of the sanitation vehicle according to the garbage coverage rate based on preset rules. This invention can improve the accuracy of road garbage coverage rate identification and significantly optimize vehicle operating energy consumption and operating costs.
Owner:LONG MA HU LIAN (FU JIAN) KE JI YOU XIAN GONG SI

A Multi-Objective Optimization Method for Engine Rear Gear System Shaping Incorporating Attention Mechanism

PendingCN122088278ATaking into account the needs of all working conditionsStrong adaptability in all working conditionsGeometric CADBiological modelsDecision modelGear wheel
This invention discloses a multi-objective optimization method for modifying the rear gear system of an engine using an attention-integrated mechanism, relating to the fields of engine NVH control and transmission system design technology. The method first constructs a multibody dynamics model of the engine's rear gear system, including idle speed, rated power point, and common operating speed conditions. The common operating speed conditions are selected as the global optimization benchmark, and a genetic algorithm is used to obtain the initial modification parameter combination. Then, an attention-integrated mechanism is introduced, dynamically and iteratively adjusting the weight coefficients of each operating condition based on the positive or negative state of the error improvement value, and performing a secondary verification of the initial modification parameters. If the weighted total improvement value after iteration is less than zero, negative screening is performed to eliminate the affected components. Finally, the optimization effect is verified by establishing a "dynamic force-vibration-noise" simulation chain. This invention effectively resolves the physical conflict between idling knocking and high-speed whistling by constructing a nonlinear decision model of "dynamic weight allocation + negative screening of operating conditions," achieving robust improvement in the NVH performance of the engine gear system across the entire operating range.
Owner:WUHAN UNIV OF SCI & TECH

Multi-motor synchronous control method, device and equipment and computer readable storage medium

The invention discloses a multi-motor synchronous control method, a multi-motor synchronous control device, multi-motor synchronous control equipment and a computer readable storage medium, and belongs to the field of motor control. And the speed consistency can be improved by uniformly driving each motor through the target driving current determined based on the closed-loop control algorithm, so that the current actual running speed and the current target running speed of the motor set for driving the track are determined in each preset period; according to the deviation value of the actual operation speed relative to the target operation speed, target driving current is determined through a closed-loop control algorithm; finally, all motors in the motor set are driven through the target driving current, the target driving current can be periodically updated, all the motors are uniformly driven, the running speed of all the motors is made to periodically approach the target running speed, and therefore the speed consistency of all the motors can be improved, and losses of the motors and rail components are reduced.
Owner:ZHEJIANG YIKEDA INTELLIGENT TECH CO LTD

Freight sky rail transportation organization scheme determination method and design system

The invention provides a freight sky rail transportation organization scheme determination method and a design system. The freight sky rail transportation organization scheme determination method comprises the following steps: acquiring basic data; generating a transportation organization scheme through a preset rule and a constraint condition according to the basic data; wherein the preset rules comprise a driving organization scheme design rule, a vehicle marshalling scheme design rule, a loading and unloading scheme design rule and a vehicle base and wiring scheme design rule; the constraint conditions comprise the highest operation speed, the travel speed interval, the loading and unloading time interval, the travel interval, the station dwell time, the loading and unloading time, the station entering and exiting time, the daily maintenance time and the accidental fault outage time; and carrying out weighted rating on the generated transportation organization scheme. According to the method, automatic design of the transportation organization scheme is realized, and the design efficiency and the design consistency are improved.
Owner:WUHAN CRRC INTELLIGENT TRANSPORTATION SYST CO LTD

Method, device and system for measuring speed and positioning of rack rail train based on multi-information fusion

The present application relates to mountain rail transit technical field, provide a kind of based on multi-information fusion's rack train speed measurement positioning method, device and system, the method is read by the vehicle-mounted reader of setting at train bottom the encoding information of ground pulse width encoding signboard, and it is compared with the line basic data stored, realize train absolute position acquisition, simultaneously receive the count information of magnetic electric type speed sensor at gear and reflected photoelectric sensor at rack, and combine gear motor load state to determine train running state, then calculate train relative running distance and running speed, and the absolute position is fused with relative running distance, finally obtain train real-time positioning information and actual running speed, when error exceeds threshold value, issue warning and recalculate.The present application improves the precision and reliability of train positioning and speed measurement, realizes rack section train continuous, dynamic, accurate operation control, has significant engineering application value.
Owner:SICHUAN SHUDAO NEW STANDARD RAIL GRP CO LTD +1

Track multi-source dynamic detection data mileage alignment method and device

The application discloses a track multi-source dynamic detection data mileage alignment method and device, and relates to the technical field of track transportation; wherein the method comprises the following steps: removing the broken chain of standard mileage data according to the standard mileage data of standard data, a sampling interval, a starting sampling point mileage and line broken chain account information, so as to obtain standard straight development mileage and broken chain position information; performing mileage integration reset on to-be-calibrated mileage data according to train running speed data, a sampling frequency of the to-be-calibrated data and the starting sampling point mileage, so as to obtain to-be-calibrated straight development mileage; configuring calibration parameters; calibrating the to-be-calibrated straight development mileage in sections according to the calibration parameters, first vehicle body acceleration data, second vehicle body acceleration data and the standard straight development mileage, so as to obtain calibration straight development mileage corresponding to the to-be-calibrated straight development mileage; performing broken chain correction on the calibration straight development mileage according to the broken chain position information, so as to obtain calibration mileage data after mileage alignment of the to-be-calibrated mileage data. The application can improve the accuracy of mileage alignment.
Owner:CHINA ACADEMY OF RAILWAY SCI CORP LTD +2

Boost pressure fault diagnosis method, device, electronic device and storage medium

The present invention relates to the field of engine technology, and in particular to a method, device, electronic device and storage medium for diagnosing boost pressure faults. The method comprises: obtaining the operating speed, torque and boost pressure values corresponding to the target engine in real time; calculating the effective work accumulation and boost pressure accumulation corresponding to the target engine based on the relationship between the operating speed, torque and boost pressure values; and determining the target engine boost pressure fault based on the relationship between the effective work accumulation and the boost pressure accumulation. The accuracy of the determined target engine boost pressure fault is ensured. This avoids the situation where the boost pressure value at a certain moment is greater than the upper threshold value or less than the lower threshold value, resulting in a false fault alarm, thereby improving the accuracy and effectiveness of determining the target engine boost pressure fault.
Owner:HUNAN DEUTZ POWER CO LTD

Establishment method of protection level system of roadside guardrail of off-highway tourism vehicle

A method for establishing a protection level system of a roadside guardrail of an off-highway tour sightseeing vehicle relates to a public traffic safety technology, establishes a collision energy calculation model based on vehicle actual parameters and limit operation conditions, and divides a protection level accurately matched with vehicle risks so as to effectively improve the operation safety level of the sightseeing vehicle. The method for establishing the protection level system comprises the following steps of: acquiring key technical parameters of a large number of in-use sightseeing vehicles in a target area, at least including rated passenger number, curb mass and maximum running speed; performing statistical analysis on the collected servicing quality data of each vehicle type, and determining a 90th percentage value P90 as representative quality of the vehicle type; establishing a physical model for calculating the collision energy of the sightseeing vehicle, wherein the input parameters comprise the calculation mass, the collision speed and the collision angle; and according to the calculated collision energy range of the main vehicle model, establishing and dividing special off-highway sightseeing vehicle guardrail protection levels T1, T2, T3 and T4.
Owner:ZHAOQING TESTING INST OF GUANGDONG SPECIAL EQUIP TESTING RES INST

A method and system for intelligently monitoring the operation status of park AGVs, and electronic equipment

The present invention provides a method and system for intelligently monitoring the running status of an AGV in a park, and an electronic device. The method obtains the motor drive current data, vibration frequency data, load data, and current speed data of the sample AGV during its running at preset time intervals, and then uses the coupling relationship among the motor drive current data, vibration frequency data, load data, and current speed data to train an intelligent recognition model for abnormal running status of the AGV. When the model training is completed, the trained intelligent recognition model for abnormal running status of the AGV is used to perform a qualitative analysis on the running status of the target AGV, and then determine whether the running status of the target AGV at the current moment is abnormal. This solves the problem in the prior art that it is difficult to accurately determine whether the running status of the AGV is normal through quantitative analysis due to differences in running speed, load, road condition, and aging status of various components of the vehicle body.
Owner:QINGDAO BIG DATA TECH DEV GRP CO LTD

An asphalt paver that allows for easy adjustment of asphalt flow rate.

This invention discloses an asphalt paver with easily adjustable asphalt flow rate, relating to the field of road construction technology. It includes a frame with a drive wheel connected to it, a raw material bin connected to the frame, and a material discharge limiting groove connected below the raw material bin. A material discharge adjusting component is installed within the material discharge limiting groove. Both the material discharge adjusting component and the drive wheel are connected to a motor. This invention, by connecting the material discharge adjusting component and the drive wheel to the motor, allows the rotational speed of the material discharge adjusting component to adapt to the rotational speed of the drive wheel. This, in turn, adapts the paver's travel speed to the asphalt discharge speed, solving the problem that when the paver's operating speed changes significantly while the asphalt discharge speed remains constant, the paver's surface smoothness deteriorates and the pre-compaction density of the asphalt layer is affected during asphalt pavement construction.
Owner:ANHUI HIGHWAY BRIDGE ENG CO LTD +1