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公开(公告)号：US11827258B2
公开(公告)日：2023-11-28
申请号：US17965795
申请日：2022-10-14
Applicant: Southwest Jiaotong University
Inventor： Pengfei Sun , Xiaoyun Feng , Qingyuan Wang , Junshu Cheng , Wensheng Song
IPC: B61L27/04
CPC classification number: B61L27/04
Abstract: A train driver assistance method includes: acquiring basic data of a train under a complex and severe condition; determining whether a traction power system is normal according to the basic data; if so, acquiring an energy-efficient optimized speed profile of the train in a normal state according to the basic data of the train in the current state; and if not, acquiring an energy-efficient optimized speed profile of the train in an abnormal state according to the basic data of the train in the current state. In this way, the method can acquire the energy-efficient optimized speed profile of the train in its current state. The comprehensive electric train driver assistance method can enable the train to adapt to the complex and severe environment and realize the energy-efficient operation of the train and self-rescue of the train.
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公开(公告)号：US11782185B1
公开(公告)日：2023-10-10
申请号：US18297455
申请日：2023-04-07
Applicant: Southwest Jiaotong University
Inventor： Kaiwen Liu , Ruizhe Qiu , Qian Su , Jun Gao , Pengpeng Ni , Yanfei Pei
CPC classification number: G01V99/005 , B61L23/04 , G06F30/25 , E01B1/002
Abstract: A ballastless track roadbed damage forewarning method considering uncertainty includes the following steps. Step 1: counting roadbed material parameters and precipitation; Step 2: establishing a FLAC-PFC model of a ballastless track roadbed and calibrating mesoscopic parameters of a roadbed surface layer; Step 3: generating a lognormal random field of particle contact friction coefficients and assigning it to particle contact nodes of the roadbed surface layer; Step 4: perform sampling on the precipitation and adjusting a fluid domain of the roadbed surface layer; Step 5: determining a worst spatial correlation distance in the random field; and Step 6: calculating a damage probability pf of the roadbed surface layer under the worst spatial correlation distance; outputting alarm information when pf exceeds an alarm threshold, otherwise, quitting. The method monitors and gives early warning of damage to the roadbed surface layer under dynamic loads, ensuring driving safety.
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公开(公告)号：US20230202234A1
公开(公告)日：2023-06-29
申请号：US18018343
申请日：2021-04-29
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Qunzhan LI
IPC: B60B37/10
CPC classification number: B60B37/10
Abstract: The present disclosure provides a composite powered wheel set, a train, a wheel-rail system and a train control method. The composite powered wheel set comprises two booster wheels and two support wheels mounted on a driving axle. The booster wheels are fixedly mounted on two ends of the driving axle, the support wheels are mounted on the driving axle via bearings, the moving axle is connected to a first transmission device, which is connected to a first power mechanism, and the driving axle is further connected to a train bogie via a connecting device. Booster wheels and booster rails are provided to improve anti-skid performance, so the train will not skid when running on a steep slope or under a heavy traction load. Restrictions on the railway slope, train traction load, and train speed are eliminated to a great extent, and the application scope of the wheel rails is expanded.
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公开(公告)号：US20220178093A1
公开(公告)日：2022-06-09
申请号：US17200924
申请日：2021-03-15
Applicant: Southwest Jiaotong University
Inventor： Zhixiang YU , Lijun ZHANG , Liru LUO , Yuntao JIN , Lei ZHAO , Xin QI , Shichun ZHAO
IPC: E01F7/04
Abstract: A throwing toughness buffer mesh unit for a rockfall protection and a design method of a critical throwing angle thereof are provided. The throwing toughness buffer mesh unit includes a cable column, wherein the cable column is provided with a sliding device on a top end and connected to a foundation structure via a hinged support at a bottom; a support rope, wherein the support rope is connected to the sliding device on the cable column in a sliding way and provided with a spring buffer on an end, wherein the spring buffer is obliquely anchored to a rock mass base near a protection structure; a protection net, which is obliquely hung on the support rope via a connector. A pavement inclination angle of the protection net is adjusted to a critical throwing angle by adjusting a height difference between cable columns to control a throwing track of falling rocks.
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35.发明申请公开(公告)号：US20220030473A1
公开(公告)日：2022-01-27
申请号：US17359664
申请日：2021-06-28
Applicant: Southwest Jiaotong University
Inventor： Wenfang ZHANG , Xiaomin WANG , Dan CHEN
Abstract: A method for batch handover authentication and key agreement oriented to a heterogeneous network generally includes the following steps: A, system establishment and participant registration: users participating in authentication register on the LTE-A network to obtain their respective identity information; B, access authentication: when a large number of users request access to the WLAN, the target network WLAN is discovered by using the ANDSF, and the leader sends a complete group authentication message to the AAA server of the WLAN to request identity authentication; if the authentication succeeds, the AAA server of the WLAN returns an identity authentication response; C, if the authentication fails, the continued execution of the protocol is terminated. The method effectively realizes batch authentication of users during handover from the LTE-A network to the WLAN, and thus has high authentication efficiency, small signaling overheads, and high security.
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Patent Agency Ranking
公开(公告)号：US11225786B2
公开(公告)日：2022-01-18
申请号：US17030396
申请日：2020-09-24
Applicant: Southwest Jiaotong University
Inventor： Zhixiang Yu , Yuntao Jin , Chun Liu , Liping Guo , Liru Luo , Wenjun Gao , Hu Xu , Lei Zhao , Rui Guo
Abstract: A dry process connected energy-consuming beam column joint based on a corbel includes a prefabricated concrete corbel column, pre-buried steel plates and connecting steel plates, wherein the corbel section of the prefabricated concrete corbel column is stepped, and a notch section of a prefabricated concrete notch beam is matched with the stepped section of the corbel and is in lap joint to the stepped section; the pre-buried steel plates are separately pre-buried on the upper and lower surfaces of the corbel and the prefabricated concrete notch beam, friction plates are arranged outside the pre-buried steel plates, and slight tooth spaces are arranged on the sides, facing the pre-buried steel plates, of the friction plates; and the connecting steel plates are arranged on the left and right sides of the prefabricated concrete notch beam and the corbel lap joint section.
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公开(公告)号：US11167960B2
公开(公告)日：2021-11-09
申请号：US17338473
申请日：2021-06-03
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Zeqiang Zhang , Peiyu Xu , Silu Liu , Mengke Xie , Yu Zhang , Feng Chen
Abstract: A gantry crane for a container includes a portal main frame, a traveling mechanism, a translation mechanism, a hoisting mechanism and a spreader assembly. The spreader assembly includes a spreader body, two telescopic girders and a drive assembly. The drive assembly includes a cam, a sliding way and two sliding blocks. Two arc-shaped first sliding grooves are circumferentially provided on the cam. A middle of the sliding way is rotatably connected with the cam. Two sides of connection of the sliding way and the cam on the sliding way are provided with a second sliding groove. Each sliding block matches with the first and second sliding grooves, and can slide back and forth along them. The telescopic beams are slidably connected to the spreader body, and are symmetrically provided and connected to the sliding blocks, respectively.
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公开(公告)号：US20210342503A1
公开(公告)日：2021-11-04
申请号：US17023385
申请日：2020-09-17
Applicant: Southwest Jiaotong University
Inventor： Zhixiang YU , Liru LUO , Yuntao JIN , Liping GUO , Hu XU , Xin QI , Lei ZHAO , Shichun ZHAO
IPC: G06F30/20
Abstract: A calculation method of limit load, deformation and energy dissipating of a ring net panel of a flexible protection net, includes step (1): determining geometrical parameters of the ring net, connection type of steel rings, and diameter of steel wires; step (2): determining a loading rate, a loaded region and a boundary condition of the ring net panel; step (3): obtaining basic mechanical parameters of materials through tests, and establishing a critical damage criterion of the ring net panel; step (4): establishing an equivalent calculation model of a ring net panel based on a fiber-spring unit; and step (5): calculating a puncturing displacement, a puncturing load and energy dissipating of the ring net panel. The method adopts a calculation assumption of load path equivalence.
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公开(公告)号：US20210292133A1
公开(公告)日：2021-09-23
申请号：US17338473
申请日：2021-06-03
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Zeqiang ZHANG , Peiyu XU , Silu LIU , Mengke XIE , Yu ZHANG , Feng CHEN
Abstract: A gantry crane for a container includes a portal main frame, a traveling mechanism, a translation mechanism, a hoisting mechanism and a spreader assembly. The spreader assembly includes a spreader body, two telescopic girders and a drive assembly. The drive assembly includes a cam, a sliding way and two sliding blocks. Two arc-shaped first sliding grooves are circumferentially provided on the cam. A middle of the sliding way is rotatably connected with the cam. Two sides of connection of the sliding way and the cam on the sliding way are provided with a second sliding groove. Each sliding block matches with the first and second sliding grooves, and can slide back and forth along them. The telescopic beams are slidably connected to the spreader body, and are symmetrically provided and connected to the sliding blocks, respectively.
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公开(公告)号：US20210129707A1
公开(公告)日：2021-05-06
申请号：US17255777
申请日：2019-06-21
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Qunzhan LI , Jiqin WU
Abstract: The present invention provides a three-phase power supply and collection device for a maglev train. A cross beam is arranged at the middle part of the bogie of the maglev train, and the lower surface of the cross beam is provided with three sets of longitudinal bearing seats, and three insulating bushes, three collector shoes and three power supply rails corresponding to the longitudinal bearing seats; the two ends of the horizontal part of each insulating bush is a rotating shaft structure, and the vertical part of the insulating bush is a hollow tubular structure; the upper part of each collector shoe is the shoe handle, the lower part is the shoe body, and the bottom of the shoe body is in a concave semicircular shape; the top surface of each power supply rail is in a convex semicircular shape.
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