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31.发明申请ACTIVE VIBRATION ISOLATION DEVICE BASED ON ELECTROMAGNETIC AND AEROSTATIC FLOATATION 有权基于电磁和航空浮动的主动振动隔离装置公开(公告)号：US20140374565A1
公开(公告)日：2014-12-25
申请号：US14376412
申请日：2013-02-26
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin Tan , Lei Wang , Rongwei Wen , Bo Zhao , Yuanyuan Yang
IPC: F16F15/023 , F16F15/03
CPC classification number: F16F15/023 , F16F15/022 , F16F15/0232 , F16F15/03
Abstract: This invention relates to an active vibration isolation installation based on electromagnetic and aerostatic floatation which is essential for the super-precision measurement and manufacture. It mainly consists of an isolation platform, an intermediate sleeve and a base. The isolation platform supports any object(s) placed on the platform and is supported by the intermediate sleeve. And the intermediate sleeve is supported on the base which is fixed on the ground. This invention uses the combination electromagnetic and aerostatic floatation to achieve large bearing capacity while excellent vibration isolation performance is maintained. This invention realizes automatic control of stiffness, using closed-loop speed control methods. It is therefore conclude that this invention can impose an excellent inhibitory action on the vibration originating from surroundings and the platform itself.
Abstract translation: 本发明涉及一种基于电磁和空气静力浮选的主动隔振装置，这对于超精密测量和制造至关重要。 它主要由隔离平台，中间套筒和底座组成。 隔离平台支撑放置在平台上并由中间套筒支撑的任何物体。 并且中间套筒支撑在固定在地面上的基座上。 本发明使用电磁和空气静电浮选的组合来实现大的承载能力，同时保持优异的隔振性能。 本发明使用闭环速度控制方法实现刚度的自动控制。 因此，可以得出结论，本发明可以对来自周围环境的振动和平台本身施加优异的抑制作用。
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32.发明申请Translation Mirror Based Beam Steering Mechanism With Ultrahigh Frequency Response And High Sensitivity 有权具有超高频响应和高灵敏度的基于反射镜的光束转向机构公开(公告)号：US20140198367A1
公开(公告)日：2014-07-17
申请号：US13980036
申请日：2012-09-28
Applicant: Harbin Institute of Technology
Inventor： Jiubin Tan , Fan Zhu , Jiwen Cui
IPC: G02B26/08
CPC classification number: G02B26/0816 , G01S7/4817 , G01S17/42 , G02B26/0858 , G02B26/101 , H01S3/0071
Abstract: This invention relates to a beam steering mechanism with ultrahigh frequency response and high sensitivity, which is based on the translation of two mirrors. Beam steering is achieved by the translations of two mirrors in the X axial mirror group and Y axial mirror group. The two translation mirrors are located at the output ends of two PZT actuators, and are directly actuated by the two PZT actuators. The dynamic characteristics of the two translation mirrors are always exactly the same as the output characteristics of the PZT actuators. There is no mechanical translation loss in this beam steering mechanism, and so, the beam steering mechanism has an ultrahigh frequency response and high angular deflection sensitivity.
Abstract translation: 本发明涉及一种具有超高频响应和高灵敏度的光束转向机构，其基于两个反射镜的平移。 光束转向通过X轴反射镜组和Y轴反射镜组中的两个反射镜的平移来实现。 两个平移反射镜位于两个PZT执行器的输出端，并由两个PZT执行器直接驱动。 两个平移反射镜的动态特性总是与PZT执行器的输出特性完全相同。 在该光束转向机构中没有机械平移损耗，因此，光束转向机构具有超高频响应和高角度偏转灵敏度。
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公开(公告)号：US12203818B2
公开(公告)日：2025-01-21
申请号：US17704090
申请日：2022-03-25
Applicant: Harbin Institute of Technology
Inventor： Weijia Shi , Bo Zhao , Jiubin Tan
IPC: G01L5/173 , G01L1/16 , G01L5/167 , G01N3/06 , G01N3/08 , G01N29/07 , G01N29/44 , G01L1/25 , G01M5/00 , G01N29/04 , G01N29/24
Abstract: The disclosure provides a method, system, device and medium for online monitoring of a plane stress field without baseline data based on a piezoelectric transducer array. Since Lamb waves have complex multi-mode characteristics, a suitable excitation frequency needs to be selected according to geometric dimensions of the structure to be measured, and then, only low-order mode Lamb waves are excited inside the measured structure to avoid serious waveform aliasing. For isotropic measured objects, anisotropic characteristics will be generated under the action of pre-stresses, that is, the propagation velocities of ultrasonic waves in all directions are different, but there is a linear relationship between velocity changes in different propagation directions and stresses. Therefore, there is still a linear relationship between the difference of velocity changes in different propagation directions and the stress. According to this characteristic, a characterization method of an absolute stress field without baseline data can be implemented. The method of the disclosure can make full use of the low attenuation characteristics of the Lamb waves to realize online monitoring of the plane stress field with a large coverage area.
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公开(公告)号：US12038413B2
公开(公告)日：2024-07-16
申请号：US17551319
申请日：2021-12-15
Applicant: Harbin Institute of Technology
Inventor： Bo Zhao , Weijia Shi , Jiaxin Li , Jiubin Tan
CPC classification number: G01N29/348 , G01N29/075 , G01N29/30 , G01N29/4436 , G01N29/46 , G01N2291/0234 , G01N2291/02827 , G01N2291/0421 , G01N2291/048 , G01N2291/057 , G01N2291/102 , G01N2291/2694
Abstract: The disclosure discloses a stress gradient high-efficiency non-destructive detection system based on frequency domain calculation of broadband swept frequency signals, and a detection method thereof. The detection method includes: step 1: calibrating an LCR wave velocity of an object to be measured; step 2: calculating a starting frequency and a cut-off frequency of broadband swept frequency signals based on the LCR wave velocity of the object to be measured in the step 1 and a stress gradient measuring range in a depth direction of the object to be measured; step 3: converting phase delay to time delay information based on the phase delay of the starting frequency and the cut-off frequency in the step 2; and step 4: determining stresses of depths corresponding to different frequency components based on the time delay information in the step 3 to finally realize layer-by-layer scanning of stresses at different depths of the measured object. The disclosure is used to solve the problem of low stress gradient measuring accuracy, and realize the high-efficiency characterization of the stress gradient in the depth direction.
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公开(公告)号：US20230243700A1
公开(公告)日：2023-08-03
申请号：US17963254
申请日：2022-10-11
Applicant: Harbin Institute of Technology
Inventor： Ruitao Yang , Pengcheng Hu , Jiubin Tan
CPC classification number: G01J3/28 , G01J3/12 , G01J3/0218
Abstract: The present disclosure provides an approximation-free and iteration-free method for spectral analysis of an intracavity electro-optic modulation type optical frequency comb, a device and a medium. The method includes: calculating a residual phase delay of a single propagation of laser in a resonant cavity, analyzing outgoing transmission characteristics of a light source of the intracavity electro-optic modulation type optical frequency comb, accumulating laser electric field intensities corresponding to all cyclic propagation times n to obtain an outgoing laser electric field intensity E, obtaining a new approximate-free outgoing laser electric field intensity E′ of the intracavity electro-optic modulation type optical frequency comb, obtaining an outgoing laser electric field intensity Ek′ of kth-order comb teeth, calculating an outgoing laser light intensity Ik of the kth-order comb teeth and accurately analyzing a spectrum of the intracavity electro-optic modulation type optical frequency comb, determining a working state according to a simulated spectral envelope curve, and guiding the subsequent optimization design and debugging. The method for the spectral analysis of the optical frequency comb is higher in accuracy without approximation and faster in speed without iteration, and can analyze the spectrum of the intracavity electro-optic modulation type optical frequency comb according to any known working mode.
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Patent Agency Ranking
36.发明授权公开(公告)号：US11698249B2
公开(公告)日：2023-07-11
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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公开(公告)号：US20230081998A1
公开(公告)日：2023-03-16
申请号：US17551319
申请日：2021-12-15
Applicant: Harbin Institute of Technology
Inventor： Bo Zhao , Weijia Shi , Jiaxin Li , Jiubin Tan
Abstract: The disclosure discloses a stress gradient high-efficiency non-destructive detection system based on frequency domain calculation of broadband swept frequency signals, and a detection method thereof. The detection method includes: step 1: calibrating an LCR wave velocity of an object to be measured; step 2: calculating a starting frequency and a cut-off frequency of broadband swept frequency signals based on the LCR wave velocity of the object to be measured in the step 1 and a stress gradient measuring range in a depth direction of the object to be measured; step 3: converting phase delay to time delay information based on the phase delay of the starting frequency and the cut-off frequency in the step 2; and step 4: determining stresses of depths corresponding to different frequency components based on the time delay information in the step 3 to finally realize layer-by-layer scanning of stresses at different depths of the measured object. The disclosure is used to solve the problem of low stress gradient measuring accuracy, and realize the high-efficiency characterization of the stress gradient in the depth direction.
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公开(公告)号：US11581695B2
公开(公告)日：2023-02-14
申请号：US17022343
申请日：2020-09-16
Applicant: Harbin Institute of Technology
Inventor： Hongxing Yang , Yun Zou , Ziqi Yin , Jing Li , Pengcheng Hu , Jiubin Tan
Abstract: The disclosure provides a high-frequency-reproducibility laser frequency stabilization method and device based on multi-point acquisition of laser tube temperature. The laser frequency stabilization device includes: a frequency stabilization control circuit. The frequency stabilization control circuit includes a polarizing beam splitter, an optical power conversion circuit, an A/D conversion circuit, a temperature measuring circuit, a microprocessor, a D/A converter and a heating film driver. The polarizing beam splitter is disposed outside any one of laser transmitting holes. The optical power conversion circuit is disposed on reflection and refraction optical paths of the polarizing beam splitter. The optical power conversion circuit, the A/D conversion circuit, the microprocessor, the D/A converter, the heating film driver and a plurality of groups of heating films are sequentially in one-way connection. Temperature sensors, the temperature measuring circuit and the microprocessor are sequentially in one-way connection.
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公开(公告)号：US11536700B2
公开(公告)日：2022-12-27
申请号：US17079430
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Bo Zhao , Jiaxin Li , Weijia Shi , Jiubin Tan
Abstract: The disclosure relates to a control method of a probe with ultrasonic phased array transducers in a hinge array, and belongs to the technical field of ultrasonic detecting. The control method includes the steps: firstly, fixing a part under test, making a central piezoelectric array element of piezoelectric array elements for the ultrasonic phased array transducers in the hinge array make contact with a surface of the part under test, and then fixing a fixed support; before detection is started, driving the hinge array through voice coil motors to make the piezoelectric array elements completely fit the surface of the part under test, wherein the number of the piezoelectric array elements is 2N+1 (N=1, 2, 3, 4 and 5), and different values of N are selected according to a size of the part under test; with the value of pressure of the central piezoelectric array element as a standard and difference values between values of pressures of other piezoelectric array elements and the value of pressure of the central piezoelectric array element as control signals of respective corresponding voice coil motor coils, controlling output rods to drive the hinge array; keeping the values of pressures of all the piezoelectric array elements consistent by means of an incremental digital PID control method; and then realizing deflecting and focusing of ultrasonic waves by means of a time delay rule for ultrasonic detecting, thereby detecting parts under test with planar or curved surfaces.
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公开(公告)号：US11385120B2
公开(公告)日：2022-07-12
申请号：US16374926
申请日：2019-04-04
Applicant: Harbin Institute of Technology
Inventor： Yongmeng Liu , Jiubin Tan , Chuanzhi Sun
Abstract: The disclosure provides a stage-by-stage measurement, regulation and distribution method for dynamic characteristics of multi-stage components of large-scale high-speed rotary equipment. Firstly, a single-stage rotor circular contour measurement model is established, and the circular contour measurement model is simplified by using a distance from an ith sampling point of an ellipse to a geometry center to obtain a simplified circular contour measurement model. Then, actually measured circular contour data is taken into the simplified circular contour measurement model to determine a relationship between dynamic response parameters after rotor assembly and eccentricity errors as well as the amount of unbalance of all stages of rotors. Finally, a rotor speed is set according to the relationship between the dynamic response parameters after rotor assembly and the eccentricity errors as well as the amount of unbalance of all stages of rotors to obtain a critical speed parameter objective function.
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