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21.发明申请VIBRATION ISOLATOR WITH ZERO STIFFNESS WHOSE ANGLE DEGREE OF FREEDOM IS DECOUPLED WITH SPHERICAL AIR BEARING 有权振动隔离器，自由度与自由空气轴承分离，自由度为零。公开(公告)号：US20150219179A1
公开(公告)日：2015-08-06
申请号：US14421378
申请日：2014-02-19
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Junning Cui , Jiubin Tan , Lei Wang
CPC classification number: F16F15/03 , F16C32/0614 , F16F15/002 , G01B7/003 , G01D5/20 , G01L19/00 , G03F7/70833 , H02K41/0356
Abstract: A vibration isolator with zero stiffness whose angle degree of freedom is decoupled with a spherical air bearing has a main body, in which a sleeve and a lower mounting plate, a piston cylinder and the sleeve are both lubricated and supported with air bearing surfaces respectively, and the angle degree of freedom between a upper mounting plate and the lower mounting plate is decoupled with a spherical air bearing; a position close-loop control system comprising voice coil motors, displacement sensors, limit switches, a controller and a driver is introduced, and the relative position between the upper mounting plate and the lower mounting plate is precisely controlled.
Abstract translation: 具有零刚度的隔振器，其角度自由度用球形空气轴承解耦，其主体具有主体，其中套筒和下安装板，活塞缸和套筒分别被润滑并支撑在空气轴承表面上， 上安装板和下安装板之间的角度自由度用球形空气轴承分离; 引入了包括音圈电机，位移传感器，限位开关，控制器和驱动器的位置闭环控制系统，并且精确地控制了上安装板和下安装板之间的相对位置。
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22.发明申请公开(公告)号：US20150043004A1
公开(公告)日：2015-02-12
申请号：US14378880
申请日：2012-11-08
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin Tan , Pengcheng Hu , Xiaofei Diao
CPC classification number: G01B9/02007 , G01B9/02003 , G01B9/02027 , G01B9/02045 , G01B11/14 , G01B2290/70 , G01J9/04 , G02B27/283
Abstract: A high speed high resolution heterodyne interferometric method and system are provided. The invention uses two spatially separated beams with slightly different frequencies and has two measurement signals with opposite Doppler shift. The switching circuit selects one of the two measurement signals for displacement measurement according to the direction and speed of the target movement. In this invention, the measurement is insensitive to the thermal variation; the periodic nonlinearity is essentially eliminated by using two spatially separated beams; the measurable target speed of the interferometer is no longer limited by the beat frequency of the laser source.
Abstract translation: 提供了高速高分辨率外差干涉法和系统。 本发明使用具有稍微不同频率的两个空间分离的波束，并且具有相反多普勒频移的两个测量信号。 开关电路根据目标运动的方向和速度选择两个测量信号中的一个用于位移测量。 在本发明中，测量对热变化不敏感; 通过使用两个空间分离的光束基本上消除了周期性非线性; 干涉仪的可测量目标速度不再受激光源的拍频的限制。
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23.发明公开公开(公告)号：US20240060935A1
公开(公告)日：2024-02-22
申请号：US18232330
申请日：2023-08-09
Applicant: Harbin Institute of Technology
Inventor： Weijia Shi , Bingquan Wang , Bo Zhao , Jiubin Tan
CPC classification number: G01N29/041 , G01N29/07 , G01N2291/011
Abstract: An ultrasonic measurement method for plane stress on the basis of a multi-wafer air-coupled transducer relates to the technical field of ultrasonic testing. The method solves problems that a traditional measurement method for plane stress generally computes the plane stress by changing at least 3 different measurement directions and obtaining information such as an acoustic time difference in the 3 measurement directions by using a pair of contact ultrasonic transducers, which is too complicated in operation, and a coupling agent can influence measurement accuracy of the plane stress. The method includes: emitting, by an excitation signal transmission end, an ultrasonic wave passing a wafer of the multi-wafer air-coupled transducer to a member to be measured; receiving, by an excitation signal reception end, an echo returned from the member to be measured through a corresponding wafer of the multi-wafer air-coupled transducer; obtaining an acoustic time difference of lamb waves through data processing according to the ultrasonic wave and the echo; and obtaining first principal stress, second principal stress and an included angle between the first principal stress and a fiber direction of an orthotropic composite material according to the acoustic time difference of the lamb waves. The method is suitable for the field of plane stress testing.
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24.发明公开公开(公告)号：US20230228718A1
公开(公告)日：2023-07-20
申请号：US17704081
申请日：2022-03-25
Applicant: Harbin Institute of Technology
Inventor： Jiaxin Li , Jiubin Tan , Bo Zhao , Weijia Shi
CPC classification number: G01N29/07 , G01N29/34 , G01N29/36 , G01N29/46 , G01N2291/0427
Abstract: The present disclosure proposes a non-baseline on-line stress monitoring system and monitoring method based on multi-mode Lamb wave data fusion. A Lamb wave dispersion curve is established according to geometric dimensions and material parameters of a measured object, a cut-off frequency of a first-order Lamb wave mode is obtained, an excitation frequency of a Lamb wave signal is determined, and then pure Lamb waves in S0 and A0 modes obtained inside the measured object are obtained; an acoustoelastic equation is established, an elastodynamic equation of the measured object under a prestress condition is solved, and linear relationships between a group velocity and a stress of the Lamb waves in the S0 and A0 modes under the excitation frequency are obtained; data is processed through the on-line monitoring system; a stress gradient in a depth direction is calculated, and finally, a stress state of the measured object is represented. The present disclosure does not require data under a zero stress state as baseline data, does not require designing a wedge block capable of generating a critical refraction longitudinal wave, and combines acoustoelastic effects of Lamb waves in different modes to realize online stress monitoring without the baseline data.
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25.发明申请公开(公告)号：US20230033342A1
公开(公告)日：2023-02-02
申请号：US17477624
申请日：2021-09-17
Applicant: Harbin Institute of Technology
Inventor： Jiubin Tan , Jian Shi , Yang Yu
Abstract: Disclosed is a high-stability nano-radian-order angle measuring method and device based on drift value feedback, belonging to the technical field of precision measurement and the field of optical engineering. The device consists of LED light sources, convex lenses, multi-slit diaphragms, beam splitters, deflecting mirrors, steering mirrors, a collimator objective set, linear array CCDs, a four-quadrant position detector and a plane mirror. The method includes: enabling two paths of measuring light beams to carry angle change information of a measured object, respectively forming respective images on two sensors, and calculating a pitch angle and a yaw angle of the measured object relative to an optical axis by using positions of the two images so as to achieve the detection capability on the angle change of the measured object. While a focal distance of the objective is greatly improved by using the collimator objective set, the linear array CCDs are used as sensors to improve a measuring range. Therefore, the technical advantage of nano-radian-order angle limit resolution is achieved under the condition of the same measuring range. The LED light sources, the convex lenses and the multi-slit diaphragms are used, and at the same time, drift value feedback is performed by using the four-quadrant position detector and the steering mirrors, and the system stability is improved to 10 nano-radian order, thus solving the problem of limitation of light beam drift value to limit resolution of an autocollimator. Additionally, a system device designed by the present disclosure has the technical advantages of small structure size, high measurement precision and high measurement frequency response.
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Patent Agency Ranking
公开(公告)号：US11536699B2
公开(公告)日：2022-12-27
申请号：US17079427
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Weijia Shi , Bingquan Wang , Bo Zhao , Jiubin Tan
Abstract: An ultrasonic phased array transducer device with a two-dimensional hinge array structure belongs to equipment in the technical field of ultrasonic detection. A connecting rod is fixedly connected to a fixed support and a two-dimensional hinge array respectively. Voice coil motors are symmetrically arranged in a shape of the British “Union Jack” with the connecting rod as a center, and are fixedly connected to the fixed support. Force output rods are respectively connected to voice coil motor coils and the upper surfaces of array units. Piezoelectric array elements are fixedly connected to the lower surfaces of all the array units. The numbers of the voice coil motors and the force output rods are 2N (N=4, 8, 12, 16, 20), the number of the piezoelectric array elements is 2N+1, and different N values are selected according to the sizes of workpieces to be detected. In the disclosure, by adjusting the current of each voice coil motor coil, the corresponding force output rod generates displacement to drive the two-dimensional hinge array unit to generate displacement, so as to push out and retract the hinge array unit and the piezoelectric array element fixedly connected below and drive the two-dimensional hinge array to generate deformation, so that the piezoelectric array elements fully fit with the surface of the workpiece to be detected. The disclosure can be applied to detection of the workpieces to be detected with flat surfaces, curved surfaces or spherical surfaces.
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公开(公告)号：US10481325B2
公开(公告)日：2019-11-19
申请号：US15503836
申请日：2016-03-02
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiwen Cui , Kunpeng Feng , Hong Dang , Shiyuan Zhao , Junying Li , Jiubin Tan
Abstract: A fabrication method of a multi-core fiber Bragg grating (FBG) probe for measuring structures of a micro part based on the capillary self-assembly technique, wherein the diameter of the fiber (6) inscribed with FBG is reduced using a mechanical method or an etch method by the hydrofluoric acid; the fibers (6) inscribed with FBG, whose diameter has been reduced, are inserted into a tube (7) through its terminal with an inner taper angle; the FBG terminals of these fibers (6) are immersed into the UV adhesive (10) of a low viscosity and the UV adhesive (10) is raised in the gaps between the fibers (6); or the UV adhesive is dropped on these fibers (6) and the capillary bridge between the fibers (6) is formed; a most compact structure of the fiber bundle is formed as a result of the capillary self-assembly; the fiber bundle is cured using a UV light and the multi-core FBG (11) is therefore formed; the terminal of the multi-core FBG (11) is polished with an optic fiber polishing machine and then a spherical tip is fabricated with the melting fiber method or the installation method of a micro ball; therefore, a multi-core FBG (11) probe can be achieved. The method features low crosstalk between signal of FBG, inexpensive and low insertion loss.
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公开(公告)号：US09782833B2
公开(公告)日：2017-10-10
申请号：US15111145
申请日：2014-12-26
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin Tan , Yuanyuan Yang , Lei Wang , Bo Zhao
CPC classification number: B23B31/402 , B23B31/204 , B23Q3/08 , B23Q2703/10 , Y10T279/1012 , Y10T279/1258
Abstract: A pneumatic-type precision annular workpiece inner positioning surface clamping device, wherein a rod portion of a piston assembly (5) is inserted into a central hole of the wedge-shaped block (12), and the piston portion of the piston assembly (5) is located in a closed chamber of a cylinder body (15); a disc spring (3) is sleeved on the piston assembly (5); an air intake hole (1-1) is provided in the lower plate (1), an air vent hole (15-1) is provided at the upper portion of the cylinder body (15); and an elastic hinge block (6) is sleeved outside the wedge-shaped block (12). The pneumatic-type precision annular workpiece inner positioning surface clamping device has a simple structure, high reliability and strong adaptability.
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29.发明授权公开(公告)号：US09709392B2
公开(公告)日：2017-07-18
申请号：US15118312
申请日：2014-12-26
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Lei Wang , Bo Zhao , Jiubin Tan , Chuanzhi Sun
CPC classification number: G01B21/24 , F01D5/02 , F01D5/027 , F01D5/30 , F01D25/285 , G01B7/30 , G01B7/312 , G01B9/02 , G01B21/02 , G01M15/02
Abstract: An aero engine rotor assembling method and device based on concentricity and verticality measurement belongs to mechanical assembly technology. The present invention effectively solves the problem of poor coaxality after the aero engine rotor is assembled and has the characteristics of high coaxality after the rotor is assembled, reduced vibration, mounting easiness, high flexibility and improved engine performance. The measurement and device is: determining rotary reference; determining the angular positioning of a rotary table; extracting the radial error of the radial mounting plane and the inclination error of the axial mounting plane of the rotor based on the four-probe measuring device to obtain the influencing weight of this rotor to the assembled rotor on coaxality; measuring respectively all the rotors to obtain the influencing weight of each rotor to the assembled rotor on coaxality; vector optimizing the weight of each rotor to obtain the assembling angle of each rotor.
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30.发明申请公开(公告)号：US20160305764A1
公开(公告)日：2016-10-20
申请号：US15101905
申请日：2014-12-31
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiwen Cui , Junying Li , Kunpeng Feng , Jiubin Tan
CPC classification number: G01B11/007 , G01B5/012 , G01B11/18
Abstract: A method and equipment based on detecting the polarization property of a polarization maintaining fiber (PMF) probe for measuring structures of a micro part are provided. The provided method relates to how to accomplish measuring structures of a micro part by transforming two or three-dimensional contact displacements into polarization property changes of the PMF probe, and how to reconstruct the structure geometry of a micro part. The provided equipment can be used to bring the spherical tip of the PMF probe into contact with a micro part, to determine coordinates of contact points, and to reconstruct the structure geometry of a micro part. The provided method and equipment feature high sensitivity, low probing force, high inspecting aspect ratio and immunity to environment interference.
Abstract translation: 提供了一种基于检测用于测量微型部件的结构的偏振保持光纤（PMF）探针的偏振特性的方法和设备。 提供的方法涉及如何通过将二维或三维接触位移转换为PMF探针的偏振特性变化以及如何重建微型部件的结构几何形状来实现微型部件的测量结构。 所提供的设备可用于使PMF探针的球形尖端与微型部件接触，以确定接触点的坐标，并重建微型部件的结构几何形状。 提供的方法和设备具有灵敏度高，探测力低，检测宽高比和对环境干扰的抵抗能力。
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