公开(公告)号：US20180331656A1

公开(公告)日：2018-11-15

申请号：US15776780

申请日：2016-01-29

Applicant: SOUTHEAST UNIVERSITY

Inventor： Chao CHEN ,  Jianhui WU ,  Hong LI ,  Cheng HUANG ,  Meng ZHANG

IPC: H03D7/14

CPC classification number: H03D7/1491 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/16

Abstract: A self-reconfigurable returnable mixer includes a self-reconfigurable transconductance stage. The input RF voltage signal is converted into RF current through the self-reconfigurable transconductance stage. The RF current is converted into an IF signal through down-conversion and low-pass filtering. The IF signal is fed back to the reconfigurable transconductance stage; the self-reconfigurable transconductance stage presents an open-loop structure to the input RF voltage signal, and the self-reconfigurable transconductance stage presents the topology structure of the negative feedback amplifier to the fed-back IF signal. The self-reconfigurable transconductance stage circuit achieves a high-linearity IF gain while providing a high bandwidth for the RF signal, effectively alleviating the contradiction between the conversion gain and the IF linearity in the conventional returnable structure.

公开(公告)号：US10097223B2

公开(公告)日：2018-10-09

申请号：US15509202

申请日：2016-01-29

Applicant: Southeast University

Inventor： Chao Chen ,  Jianhui Wu ,  Hong Li

IPC: H04B1/26 ,  H04B1/16 ,  H03F3/45

Abstract: The present invention discloses a low power supply voltage double-conversion radio frequency receiving front end, which can work at a lower power supply voltage in a passive frequency conversion mode; a first frequency conversion unit and a second frequency conversion unit of the front end are directly cascaded, and a second orthogonal passive frequency conversion shifts a low input impedance of a transimpedance amplifier to an intermediate frequency, so as to construct a band-pass filtering function for radio frequency current; and the radio frequency current which has undergone two frequency conversions is converted into an output intermediate frequency voltage via the transimpedance amplifier. Compared with the traditional active+active or active+passive double conversion mode, the present invention omits intermediate-stage active circuits and filtering circuits, thereby saving power consumption and layout area, and realizing sufficient rejection on an image signal while ensuring a high conversion gain.

公开(公告)号：US20180224352A1

公开(公告)日：2018-08-09

申请号：US15570339

申请日：2016-08-26

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jian ZHANG ,  Qi XIA ,  Bo ZHANG ,  Shuanglin GUO

IPC: G01M7/08 ,  G01H1/14

CPC classification number: G01M7/08 ,  G01H1/00 ,  G01H1/14 ,  G01M5/0008 ,  G01M5/0066

Abstract: The present invention discloses a bridge inspection and evaluation method based on impact vibration. The method includes backward analysis of the bridge based on impact on blocks without reference points and forward analysis of the bridge based on progressive impact loading, where the backward analysis of the bridge based on impact on blocks without reference points is used to rapidly inspect the medium and small bridges from the road network to find the ones with serious shortage of bearing capacity, and the forward analysis of the bridge based on progressive impact loading is used to evaluate the actual bearing capacity of the bridges, which may have good safety condition in the backward analysis. The present invention realizes low-cost and highly efficient inspection and evaluation of the medium and small bridges in the road network.

公开(公告)号：US20180115335A1

公开(公告)日：2018-04-26

申请号：US15509202

申请日：2016-01-24

Applicant: Southeast University

Inventor： CHAO CHEN ,  JIANHUI WU ,  HONG LI

IPC: H04B1/16 ,  H03F3/45

CPC classification number: H04B1/16 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0084 ,  H03F3/195 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/451 ,  H03F2203/45116 ,  H03F2203/45288 ,  H03F2203/45481

Abstract: The present invention discloses a low power supply voltage double-conversion radio frequency receiving front end, which can work at a lower power supply voltage in a passive frequency conversion mode; a first frequency conversion unit and a second frequency conversion unit of the front end are directly cascaded, and a second orthogonal passive frequency conversion shifts a low input impedance of a transimpedance amplifier to an intermediate frequency, so as to construct a band-pass filtering function for radio frequency current; and the radio frequency current which has undergone two frequency conversions is converted into an output intermediate frequency voltage via the transimpedance amplifier. Compared with the traditional active+active or active+passive double conversion mode, the present invention omits intermediate-stage active circuits and filtering circuits, thereby saving power consumption and layout area, and realizing sufficient rejection on an image signal while ensuring a high conversion gain.

公开(公告)号：US09909195B2

公开(公告)日：2018-03-06

申请号：US14765538

申请日：2013-05-21

Applicant: BEIJING AERONAUTICAL MANUFACTURING TECHNOLOGY RESEARCH INSTITUTE ,  SOUTHEAST UNIVERSITY ,  JIANGSU UNIVERSITY

Inventor： Yongkang Zhang ,  Jinzhong Lu ,  Shuili Gong ,  Fengze Dai ,  Shikun Zou

IPC: B23K26/00 ,  C21D10/00 ,  C21D11/00 ,  B23K26/146 ,  B23K26/14 ,  B05B12/12 ,  B23K26/356 ,  B23K101/00

CPC classification number: C21D10/005 ,  B05B12/122 ,  B23K26/146 ,  B23K26/1462 ,  B23K26/1464 ,  B23K26/356 ,  B23K2101/001 ,  C21D11/005

Abstract: A method and apparatus are provided for springing a homogeneous water confinement layer on the surface of a work piece during a laser shock peening process. The method and apparatus are particularly for suitable for forming a homogeneous water layer on a low curvature surface such as found on turbine blades.

公开(公告)号：US09755696B2

公开(公告)日：2017-09-05

申请号：US15310389

申请日：2014-07-15

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jianfeng Zhao ,  Zhendong Ji ,  Wei Liu ,  Yichao Sun

IPC: H04B3/54 ,  H04L27/12 ,  H04L25/49

CPC classification number: H04B3/54 ,  H04L25/4902 ,  H04L27/12

Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.

公开(公告)号：US20170233968A1

公开(公告)日：2017-08-17

申请号：US15503399

申请日：2015-03-23

Applicant: SOUTHEAST UNIVERSITY

Inventor： Guojun CAI ,  Jun LIN ,  Gongqiao GENG

IPC: E02D1/02 ,  G01L23/26

CPC classification number: E02D1/027 ,  G01L23/26 ,  G01N3/34 ,  G01N33/24

Abstract: A gravity-type pore pressure dynamic penetration device for exploration of shallow-layer seabed soil includes a third drop hammer, a second drop hammer, a first drop hammer, a stable empennage, and a probe rod which are sequentially arranged from top to bottom. A sidewall friction sleeve is arranged outside a probe rod lower cylinder. A friction sleeve sensor is provided on an inner sidewall of the sidewall friction sleeve. A fast pore water pressure sensor, a conical tip pressure sensor, a temperature compensation sensor, and an inclinometer sensor are provided in the middle of the probe rod lower cylinder. A second pore water pressure sensor and an acceleration sensor are provided in the middle of a probe rod upper cylinder. The tail portion of the probe rod, that is, the upper portion of the probe rod upper cylinder is connected to the stable empennage.

公开(公告)号：US20170149473A1

公开(公告)日：2017-05-25

申请号：US15310389

申请日：2014-07-15

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jianfeng Zhao ,  Zhendong Ji ,  Wei Liu ,  Yichao Sun

IPC: H04B3/54 ,  H04L27/12

CPC classification number: H04B3/54 ,  H04L25/4902 ,  H04L27/12

Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.

公开(公告)号：US20160215362A1

公开(公告)日：2016-07-28

申请号：US14914799

申请日：2013-10-23

Applicant: Wenzhou University ,  Jiangsu University ,  Southeast University

Inventor： Wei XUE ,  Jinzhong LU ,  Mi LUO ,  Yongkang ZHANG ,  Fengze DAI

IPC: C21D10/00 ,  B23K26/073 ,  B23K26/0622 ,  B23K26/146 ,  B23K26/08 ,  B23K26/00 ,  B23K26/356

CPC classification number: C21D10/005 ,  B23K26/0622 ,  B23K26/0738 ,  B23K26/0861 ,  B23K26/146 ,  B23K26/356 ,  C21D9/0068 ,  C21D10/00

Abstract: A laser shock peening method and device for a bottom surface of a tenon groove of an aircraft blade. During the laser shock peening process, according to geometric characteristics of the bottom surface of a tenon groove, a circular facula of a laser beam is changed into a strip-shaped facula, at the same time as a flow-guiding injection device and a water pumping device are respectively arranged at two end surfaces of the bottom surface of the tenon groove to ensure the stability of a water confinement layer.

Abstract translation: 用于飞行器叶片的榫槽的底面的激光冲击硬化方法和装置。 在激光冲击硬化过程中，根据榫槽底面的几何特性，将激光束的圆形光斑变成条状光斑，同时作为导流注射装置和水 泵送装置分别布置在榫槽的底表面的两个端表面处，以确保水限制层的稳定性。

公开(公告)号：US20160112973A1

公开(公告)日：2016-04-21

申请号：US14780096

申请日：2013-06-20

Applicant: Southeast University

Inventor： Haiming Wang ,  Zhuming Deng ,  Xiqi Gao ,  Xiaohu You

IPC: H04W56/00

CPC classification number: H04W56/001 ,  H04J13/0062 ,  H04L27/2655 ,  H04L27/2692 ,  H04W84/06

Abstract: Disclosed is a main synchronization sequence design method for global covering multi-beam satellite LTE, comprising the follow steps: extending a standard Zadoff-Chu sequence to a generalized Zadoff-Chu sequence so as to obtain an initial candidate main synchronization sequence set of more candidate sequences; gradually narrowing down the candidate main synchronization sequence set according to a selection standard of a main synchronization sequence to obtain a final candidate main synchronization sequence set; and obtaining a main synchronization sequence set with optimal eclectic performance and complexity from the final candidate main synchronization sequence set. According to the present invention, a main synchronization sequence with optimal eclectic performance and calculation complexity can be designed for a global covering same-frequency networking multi-beam satellite LTE system.

Abstract translation: 公开了一种全球覆盖多波束卫星LTE的主同步序列设计方法，包括以下步骤：将标准Zadoff-Chu序列扩展到广义Zadoff-Chu序列，以获得更多候选的初始候选主同步序列集 序列; 根据主同步序列的选择标准逐渐缩小候选主同步序列集，以获得最终候选主同步序列集; 并且从最终候选主同步序列集合获得具有最佳折衷性能和复杂性的主同步序列集合。 根据本发明，可以为全球覆盖同频联网多波束卫星LTE系统设计具有最佳折衷性能和计算复杂度的主同步序列。