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1. 发明申请

US20230081998A1 Stress gradient high-efficiency non-destructive detection system based on frequency domain calculation of broadband swept frequency signals, and detection method thereof 有权
公开(公告)号：US20230081998A1
公开(公告)日：2023-03-16
申请号：US17551319
申请日：2021-12-15
申请人： Harbin Institute of Technology
发明人： Bo Zhao , Weijia Shi , Jiaxin Li , Jiubin Tan
IPC分类号： G01N29/34 , G01N29/42 , G06F17/14
摘要： 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.

2. 发明授权

US11536700B2 Control method of probe with ultrasonic phased array transducers in hinge array 有权
公开(公告)号：US11536700B2
公开(公告)日：2022-12-27
申请号：US17079430
申请日：2020-10-24
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Bo Zhao , Jiaxin Li , Weijia Shi , Jiubin Tan
IPC分类号： G01N29/26 , G01N29/22 , G01N29/24 , G01N29/04
摘要： 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.

3. 发明授权

US09746096B2 Four-state adjustable air path structure 有权
公开(公告)号：US09746096B2
公开(公告)日：2017-08-29
申请号：US15111750
申请日：2014-12-26
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Bo Zhao , Jianwei Wu , Jiubin Tan , Lei Wang
IPC分类号： F15B13/04 , F16K31/06 , F15B1/26 , F15B21/04 , F16K11/02
CPC分类号： F16K31/0603 , F15B1/265 , F15B21/048 , F16K11/02 , Y10T137/87169 , Y10T137/87917
摘要： This invention relates to a four-state adjustable air path structure. An air source is connected to an air storage tank and a first two-position three-way solenoid valve via a check valve. The first two-position three-way solenoid valve is connected to a second two-position three-way solenoid valve and a vent hole. The second two-position three-way solenoid is connected to a third two-position three-way solenoid valve and a port of a throttle valve. Another port of the throttle valve is connected to the third two-position three-way solenoid valve. The third two-position three-way solenoid valve is connected to an air tank. The present four-state adjustable air path structure simplifies processing and maintenance of a mechanical structure. Intellectual control of an operating speed can also be achieved. The present invention has advantages such as structural simplicity, low manufacturing costs, safe and reliable operation, long service life, and suitability for long-distance transmission.

4. 发明授权

US11536699B2 Ultrasonic phased array transducer device with two-dimensional hinge array structure 有权
公开(公告)号：US11536699B2
公开(公告)日：2022-12-27
申请号：US17079427
申请日：2020-10-24
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Weijia Shi , Bingquan Wang , Bo Zhao , Jiubin Tan
IPC分类号： G01N29/26 , G01N29/24
摘要： 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.

5. 发明授权

US09782833B2 Pneumatic-type precision annular workpiece inner positioning surface clamping device 有权
公开(公告)号：US09782833B2
公开(公告)日：2017-10-10
申请号：US15111145
申请日：2014-12-26
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Jiubin Tan , Yuanyuan Yang , Lei Wang , Bo Zhao
IPC分类号： B23B31/40 , B23B31/20 , B23Q3/08
CPC分类号： B23B31/402 , B23B31/204 , B23Q3/08 , B23Q2703/10 , Y10T279/1012 , Y10T279/1258
摘要： 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.

6. 发明授权

US09709392B2 Aero engine rotor assembling method and device based on concentricity and verticality measurement 有权
公开(公告)号：US09709392B2
公开(公告)日：2017-07-18
申请号：US15118312
申请日：2014-12-26
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Lei Wang , Bo Zhao , Jiubin Tan , Chuanzhi Sun
IPC分类号： G01B7/30 , G01B21/24 , G01M15/02 , G01B21/02 , G01B9/02 , F01D5/02 , F01D5/30
CPC分类号： G01B21/24 , F01D5/02 , F01D5/027 , F01D5/30 , F01D25/285 , G01B7/30 , G01B7/312 , G01B9/02 , G01B21/02 , G01M15/02
摘要： 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.

7. 发明申请

US20140374565A1 ACTIVE VIBRATION ISOLATION DEVICE BASED ON ELECTROMAGNETIC AND AEROSTATIC FLOATATION 有权
标题翻译：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
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Jiubin Tan , Lei Wang , Rongwei Wen , Bo Zhao , Yuanyuan Yang
IPC分类号： F16F15/023 , F16F15/03
CPC分类号： F16F15/023 , F16F15/022 , F16F15/0232 , F16F15/03
摘要： 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.
摘要翻译：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。

8. 发明申请

US20230120241A1 Linkage device, transceiver module and plane stress field measuring device and method capable of achieving synchronous adjustment of distance and angle 有权
公开(公告)号：US20230120241A1
公开(公告)日：2023-04-20
申请号：US17552467
申请日：2021-12-16
申请人： Harbin Institute of Technology
发明人： Weijia Shi , Jiaxin Li , Bo Zhao , Jiubin Tan
IPC分类号： G01N29/26 , G01N29/07 , G01B17/00
摘要： Disclosed are a linkage device, a transceiver module and a plane stress field measuring device and method capable of achieving synchronous adjustment of distance and angle, and relates to the field of ultrasonic non-destructive testing. The existing technical means for measuring plane stress in the field of ultrasonic testing has the shortcomings that the same testing is only applicable for single materials and the deflection angles of transmitting and receiving transducers are inconsistent. In the application, the linkage device designed by comprising a distance adjusting screw, an angle adjusting screw, a left connecting rod, a right connecting rod, a shaft column and a column lock is adopted, and based on the linkage device, the transceiver module designed by comprising a receiving end wedge, a receiving probe, a transmitting end wedge and a transmitting probe is additionally arranged; based on the transceiver module, the measuring device designed by comprising a pulse transmitting device, an amplifying device and a data acquisition device is additionally arranged, and the stress measuring method applicable for the stress measuring device is provided; and the distance and deflection angle between the receiving probe and the transmitting probe of the detection are adjusted according to a tested part. The application applies to stress measurement in the manufacturing process of mechanical components.

9. 发明授权

US11539309B2 Zero-voltage zero-current soft switching type driving method for ultrasonic driving unit 有权
公开(公告)号：US11539309B2
公开(公告)日：2022-12-27
申请号：US17079432
申请日：2020-10-24
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Weijia Shi , Xuyang Yu , Bo Zhao , Jiubin Tan
IPC分类号： H02N2/14 , H02N2/00
摘要： A zero-voltage zero-current soft switching type driving method for an ultrasonic motor is provided, relating to the technical field of driving of a two-phase actuator. The disclosure solves the problems of high loss, high heat amount and the like in a traditional ultrasonic motor driving circuit. The method provided realizes resonance between series inductors and buffer capacitors by means of an optimal design of the inductance of matching inductors, the capacitance of buffer capacitors, a dead time value and a delay time value, thereby causing a power tube to realize zero-voltage and zero-current switching. Two signal input ends of a two-phase pseudo full bridge inverter are connected to a power grid, and two signal output ends of the two-phase pseudo full bridge inverter are respectively connected to two signal input ends of a matching circuit; and the output ends of the matching circuit are respectively connected to a two-phase ultrasonic motor.

10. 发明授权

US09724791B2 Aircraft engine rotor assembly method and device 有权
公开(公告)号：US09724791B2
公开(公告)日：2017-08-08
申请号：US15118803
申请日：2014-12-26
申请人： HARBIN INSTITUTE OF TECHNOLOGY
发明人： Bo Zhao , Lei Wang , Jiubin Tan , Chuanzhi Sun
IPC分类号： B23P15/04 , G01B5/20 , F01D25/28 , F01D5/00 , G01B5/207 , F01D5/02
CPC分类号： B23P15/04 , F01D5/005 , F01D5/02 , F01D5/027 , F01D5/26 , F01D25/285 , F05D2220/323 , F05D2230/64 , F05D2250/31 , G01B5/205 , G01B5/207
摘要： Aircraft engine rotors traditionally have low coaxiality after assembly. This is solved by the methods and devices described herein, having advantages that the rotors have high coaxiality after assembly, reduced vibration, easy installation, high flexibility, and improved engine performance. A measurement method and device use an air flotation rotary shaft system determining a rotary reference. An induction synchronizer determines angular positioning of a turntable. Using a four probe measurement device, a radial error of a rotor radial assembly surface and an inclination error of an axial mounting surface are extracted and an influence weight value of the rotor on the coaxiality of assembled rotors is obtained. All rotors required for assembly are measured and an influence weight value of each on the coaxiality of the assembled rotors is obtained. Vector optimization is performed on the weight value of each rotor and an assembly angle of each rotor is obtained.

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