-
公开(公告)号：US12130259B2
公开(公告)日：2024-10-29
申请号：US17704081
申请日：2022-03-25
发明人： Jiaxin Li , Jiubin Tan , Bo Zhao , Weijia Shi
CPC分类号： G01N29/07 , G01N29/34 , G01N29/36 , G01N29/46 , G01N2291/0427
摘要： 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.
-
公开(公告)号：US12066409B2
公开(公告)日：2024-08-20
申请号：US17280327
申请日：2019-10-01
发明人： Hideaki Shishido , Takayuki Ikeda
CPC分类号： G01N29/4472 , G01N29/04 , G01N29/24 , G01N29/36 , G01N29/4427 , G01N2291/0231
摘要： A cost of a testing device is reduced. A structure of a testing device is simplified. A testing device capable of testing with higher accuracy is provided. A testing device (10) has a structure including a sending unit (13), a receiving unit (14), a control unit (11), and a display (15). The control unit includes a memory portion (21) and an arithmetic portion (22). The sending unit has a function of generating a pulse signal for a probe (40) to generate an ultrasonic wave (51). The receiving unit has a function of generating a first signal including a first analog data (D1) on the basis of the input single input from the probe. The memory portion has a function of storing the first analog data. The arithmetic portion has a function of generating an image signal (S0) output to the display on the basis of the first analog data stored in the memory portion. The display has a function of displaying an image based on the image signal.
-
公开(公告)号：US20240201138A1
公开(公告)日：2024-06-20
申请号：US18532687
申请日：2023-12-07
申请人： IMEC VZW
CPC分类号： G01N29/36 , G01N29/2418
摘要： A sensor device comprises: a plurality of sensors, wherein each sensor comprises an optical resonance element configured to be affected by a measurand and has a mutually unique optical resonance frequency; the sensors being configured to receive at least one of a first and a second sensor interrogation signals forming a plurality of signal component pairs, wherein a difference in frequency between the frequencies in the signal component pair is different for different signal component pairs; wherein each sensor is configured to modulate an optical intensity of at least one frequency of a mutually unique signal component pair; and a detector, being configured to receive the first sensor interrogation signal and the second sensor interrogation signal, wherein the detector is configured to detect a plurality of mutually unique beat frequencies for detecting a plurality of measurements by the plurality of sensors.
-
公开(公告)号：US11971950B2
公开(公告)日：2024-04-30
申请号：US17704369
申请日：2022-03-25
发明人： Zhensheng Yang , Handong Xu , Haoda Li , Bangping Gu , Junliang He
CPC分类号： G06F17/18 , G01N29/36 , G01N29/449
摘要： The present invention discloses a method for onset time detection of a time-domain acoustic emission signal based on histogram distance. The method comprises the following steps: acquiring an acoustic emission signal; dividing the signal into two intervals with a sliding point k as the demarcation point; obtaining the relative frequency histograms of two adjacent intervals; obtaining histogram distance of the relative frequency histograms of two adjacent intervals; moving the sliding point k to the next element to obtain two new intervals and generating new histograms of the two new intervals and calculating the histogram distance of two new intervals; searching for the point which gives the maximum value of the histogram distances, and the corresponding time to this point is regarded as the onset time.
-
公开(公告)号：US20230273182A1
公开(公告)日：2023-08-31
申请号：US17660853
申请日：2022-04-27
申请人： Wipro Limited
CPC分类号： G01N33/46 , G01N29/048 , G01N29/07 , G01N29/343 , G01N29/36 , G01N29/4445 , G01N2291/0238
摘要： Present disclosure discloses method and system for assessing health of a wood specimen. Method receives ultrasonic data for each of a plurality of alignments of a transmitter and associated receiver across a cross-section of one or more cross-sections along a length of the wood specimen. The ultrasonic data comprises a pulse velocity, a transit time and a distance travelled by an ultrasonic pulse between the transmitter and the associated receiver. Thereafter, method measures relative features of the wood specimen using the ultrasonic data. Subsequently, method identifies a condition of the cross-section of the wood specimen based on the relative features using a trained ML model. Upon identifying the condition of the cross-section to be defective, method determines a position of a defect in the cross-section of the wood specimen using the relative features and determines a severity of the defect using the trained ML model and the relative features.
-
公开(公告)号：US11680928B2
公开(公告)日：2023-06-20
申请号：US17569808
申请日：2022-01-06
发明人： Chan-Jung Kim
CPC分类号： G01N29/12 , G01N29/36 , G01N2291/0231
摘要： This application relates to a method of analyzing dynamic characteristics of a carbon composite material. This application also relates to a method of calculating sensitivity indices for structural stiffness and a viscous damping coefficient of a carbon composite material and a method of analyzing dynamic characteristics of a carbon composite material by using the same. Respective sensitivity indices for structural stiffness and a viscous damping coefficient according to a direction (angle) of carbon fiber for a carbon composite material are calculated. A change in the dynamic characteristics of the carbon composite material is evaluated through a proportional relationship between the sensitivity indices, thereby conducting a more accurate and efficient analysis.
-
公开(公告)号：US20230130209A1
公开(公告)日：2023-04-27
申请号：US17569808
申请日：2022-01-06
发明人： Chan-Jung KIM
摘要： This application relates to a method of analyzing dynamic characteristics of a carbon composite material. This application also relates to a method of calculating sensitivity indices for structural stiffness and a viscous damping coefficient of a carbon composite material and a method of analyzing dynamic characteristics of a carbon composite material by using the same. Respective sensitivity indices for structural stiffness and a viscous damping coefficient according to a direction (angle) of carbon fiber for a carbon composite material are calculated. A change in the dynamic characteristics of the carbon composite material is evaluated through a proportional relationship between the sensitivity indices, thereby conducting a more accurate and efficient analysis.
-
公开(公告)号：US11519882B2
公开(公告)日：2022-12-06
申请号：US17020884
申请日：2020-09-15
IPC分类号： G01N29/34 , G01F1/667 , G01N29/30 , G01N29/50 , G01N29/44 , G01N29/12 , G01N29/11 , G01F1/66 , G01F25/10 , G01N29/36 , G01P5/24 , G01N29/024 , G01N29/32
摘要： A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.
-
公开(公告)号：US20220034851A1
公开(公告)日：2022-02-03
申请号：US17280327
申请日：2019-10-01
发明人： Hideaki SHISHIDO , Takayuki IKEDA
摘要： A cost of a testing device is reduced. A structure of a testing device is simplified. A testing device capable of testing with higher accuracy is provided. A testing device (10) has a structure including a sending unit (13), a receiving unit (14), a control unit (11), and a display (15). The control unit includes a memory portion (21) and an arithmetic portion (22). The sending unit has a function of generating a pulse signal for a probe (40) to generate an ultrasonic wave (51). The receiving unit has a function of generating a first signal including a first analog data (D1) on the basis of the input single input from the probe. The memory portion has a function of storing the first analog data. The arithmetic portion has a function of generating an image signal (S0) output to the display on the basis of the first analog data stored in the memory portion. The display has a function of displaying an image based on the image signal.
-
公开(公告)号：US11199523B2
公开(公告)日：2021-12-14
申请号：US16565627
申请日：2019-09-10
申请人： Farzad Vesali , Amir Bashari , Mina Kolagar
发明人： Farzad Vesali , Amir Bashari , Mina Kolagar
IPC分类号： G01N29/04 , B60L5/24 , B60L3/04 , B60L9/00 , B60L5/30 , G01N29/36 , G01N29/44 , G05B23/00 , G01N29/46
摘要： A method for monitoring a pantograph. The method includes acquiring an impulse response of the pantograph, extracting a natural frequency and a damping coefficient of the pantograph from the impulse response, obtaining a similarity factor of a plurality of similarity factors, and detecting a fault in the pantograph from the plurality of fault types based on the plurality of the similarity factors. Acquiring an impulse response of the pantograph includes generating the impulse response by tapping the head of the pantograph and recording the impulse response utilizing a recording equipment.
-
-
-
-
-
-
-
-
-
搜索结果
290 条记录 (耗时 0.028 秒)
