公开(公告)号：US11474201B2

公开(公告)日：2022-10-18

申请号：US16711448

申请日：2019-12-12

Applicant: Sichuan University

Inventor： Yang Yang ,  Kama Huang ,  Xing Chen ,  Changjun Liu ,  Huacheng Zhu

IPC: G01S7/282 ,  H05B6/68 ,  H05B6/66

Abstract: The present invention discloses a method of controlling transmitting frequencies of microwave source, which includes the following steps of: a) collecting reflection frequencies of a load according to a pre-set sampling rate; b) calculating a change rate of the reflection frequencies collected in the step a; c) setting a reflection frequency threshold and a change rate threshold; d) comparing the reflection frequencies and the change rate with the reflection frequency threshold and the change rate threshold respectively; wherein if the reflection frequencies or the change rate is less than the threshold goes to step e or returns to the step a; e) sending control signals to the microwave source and tuning the transmitting frequencies; and f) returning to step a. The present invention also discloses a microwave transmission system thereof. The present invention can be applied in controlling microwave source consists of single magnetron tube or multiple magnetron tubes.

公开(公告)号：US20170064779A1

公开(公告)日：2017-03-02

申请号：US15352604

申请日：2016-11-16

Applicant: Sichuan University

Inventor： Kama Huang ,  Huacheng Zhu ,  Yang Yang ,  Changjun Liu ,  Xing Chen

IPC: H05B6/70 ,  H05B6/68 ,  H05B6/64

CPC classification number: H05B6/705 ,  H05B6/6435 ,  H05B6/68

Abstract: The present invention relates to a technical field of microwave heating, and more particularly to a microwave frequency-selective heating device and a method thereof. The microwave frequency-selective heating device includes: a heating chamber with a microwave feed-in device, and a frequency controller; wherein the frequency controller is connected to the microwave feed-in device. According to the microwave frequency-selective heating device and the method of the present invention, the heating frequency is adjusted by setting the microwave adjusting device, which improves a material heating uniformity while greatly increases a material microwave absorption rate, so as to solve a heating efficiency problem of the conventional technologies. According to the present invention, the frequency for the heated material is intelligently selected by the micro-processor of the microwave adjusting device, and then fed in after being adjusted by the frequency control circuit, which is effective and convenient.

Abstract translation: 微波加热技术领域本发明涉及一种微波加热技术领域，更具体地涉及一种微波频率选择加热装置及其方法。 微波频率选择加热装置包括：具有微波馈入装置的加热室和频率控制器; 其中所述频率控制器连接到所述微波馈入装置。 根据微波频率选择加热装置和本发明的方法，通过设置微波调节装置来调节加热频率，从而提高材料加热均匀性，同时大大提高材料微波吸收率，从而解决加热 传统技术的效率问题。 根据本发明，由微波调节装置的微处理器智能地选择加热材料的频率，然后通过频率控制电路进行调节，这是有效和便利的。

公开(公告)号：US11054454B2

公开(公告)日：2021-07-06

申请号：US16699614

申请日：2019-11-30

Applicant: Sichuan University

Inventor： Yang Yang ,  Kama Huang ,  Huacheng Zhu ,  Xing Chen ,  Changjun Liu

IPC: G01R29/08

Abstract: A wireless passive field strength probe includes monopole antennas; a detection module; a micro processing device; a wireless transmission module and an antenna module, wherein the wireless transmission module is connected to the micro processing device and the antenna module; a frequency of the antenna module is different from a frequency of the field to be measured, and is not a harmonic of the frequency of the field to be measured; and a power module connected to the detection module or the antenna module. The wireless passive field strength probe of the present invention transmits the vector electric field, the probe serial numbers and the coordinate signals of the probe in real time through the wireless transmission module, and provides the power supply to the communication module through detecting or receiving microwave signals through the antenna, thereby avoiding inaccurate wireless measurement.

公开(公告)号：US10470257B2

公开(公告)日：2019-11-05

申请号：US15352604

申请日：2016-11-16

Applicant: Sichuan University

Inventor： Kama Huang ,  Huacheng Zhu ,  Yang Yang ,  Changjun Liu ,  Xing Chen

IPC: H05B6/70 ,  H05B6/68 ,  H05B6/64

Abstract: The present invention relates to a technical field of microwave heating, and more particularly to a microwave frequency-selective heating device and a method thereof. The microwave frequency-selective heating device includes: a heating chamber with a microwave feed-in device, and a frequency controller; wherein the frequency controller is connected to the microwave feed-in device. According to the microwave frequency-selective heating device and the method of the present invention, the heating frequency is adjusted by setting the microwave adjusting device, which improves a material heating uniformity while greatly increases a material microwave absorption rate, so as to solve a heating efficiency problem of the conventional technologies. According to the present invention, the frequency for the heated material is intelligently selected by the micro-processor of the microwave adjusting device, and then fed in after being adjusted by the frequency control circuit, which is effective and convenient.

公开(公告)号：US11690146B2

公开(公告)日：2023-06-27

申请号：US16808376

申请日：2020-03-04

Applicant: Sichuan University

Inventor： Kama Huang ,  Yi Zhang ,  Yang Yang ,  Huacheng Zhu ,  Li Wu ,  Bing Zhang

IPC: H05B6/70 ,  H05B6/80 ,  H05B6/68 ,  G01N22/00

CPC classification number: H05B6/686 ,  H05B6/707 ,  G01N22/00

Abstract: A microwave separated field reconstructed device includes: a microwave field reconstructed cavity, a first short circuit plane, a third waveguide flange and coupling windows, wherein connection ports are provided on four ends of the microwave field reconstructed cavity; the microwave field reconstructed cavity is provided with a first waveguide flange, and a second waveguide flange is provided one end of the microwave field reconstructed cavity perpendicular to the first waveguide flange; the first short circuit plane is connected to one end of the first waveguide flange away from the microwave field reconstructed cavity; a second short circuit plane is connected to one end of the second waveguide flange away from the microwave field reconstructed cavity. The input ports are distributed at two ends of the microwave field reconstructed cavity to introduce electric and magnetic fields.

公开(公告)号：US11150286B2

公开(公告)日：2021-10-19

申请号：US16699607

申请日：2019-11-30

Applicant: Sichuan University

Inventor： Kama Huang ,  Yang Yang ,  Huacheng Zhu ,  Xing Chen ,  Changjun Liu

IPC: G01R29/08

Abstract: A wireless passive probe solves problems such as the measurement accuracy of the field strength detecting device in the prior art is affected by the communication device and the system structure is complicated, which includes a probe for collecting data in the field to be measured; wherein the wireless passive probe further comprises: a wireless transmission module, an antenna module, sensors, and a microprocessor. The wireless passive probe of the present invention transmits position temperature, field strength, moisture, air pressure probe serial numbers and the coordinate signals of the probe in real time through the wireless transmission module, and provides the power supply to the communication module through detecting or receiving microwave signals through the antenna, thereby avoiding inaccurate wireless measurement of the probe field caused by the field to be tested which is not tightly sealed and the cable.

公开(公告)号：US09355808B2

公开(公告)日：2016-05-31

申请号：US14729300

申请日：2015-06-03

Applicant: Sichuan University

Inventor： Kama Huang ,  Changjun Liu ,  Yang Yang ,  Xing Chen ,  Huacheng Zhu

IPC: H01J25/50

CPC classification number: H01J25/50

Abstract: An injection locked magnetron microwave generator with a recycle of spurious energy, relating to a microwave power source, includes a frequency selective reflector for recycling the spurious energy of a magnetron and satisfies locking requirements of an output frequency of a high-output-power magnetron with a low-power injection signal. The microwave generator includes n magnetrons and n locking devices, n≧1. The locking devices inject locking signals into the corresponding magnetrons. The n locking devices are connected with a microwave source. Output terminals of the magnetrons are connected with corresponding frequency selective reflectors for reflecting the spurious microwave signals outputted by the magnetrons back to the magnetrons. The microwave generator, with a simple structure, effectively recycles the spurious energy outputted by the magnetrons, and reduces the power of the injection signal and costs of the microwave source and the overall microwave generator.

Abstract translation: 具有与微波功率源相关的杂散能量再循环的注入锁定磁控管微波发生器包括用于再现磁控管的杂散能量的频率选择性反射器，并且满足高输出功率磁控管的输出频率的锁定要求 低功率注入信号。 微波发生器包括n个磁控管和n个锁定装置，n≥1。 锁定装置将锁定信号注入到相应的磁控管中。 n个锁定装置与微波源连接。 磁控管的输出端子与相应的频率选择反射器连接，用于将由磁控管输出的杂散微波信号反射回磁控管。 具有简单结构的微波发生器有效地回收了磁控管输出的杂散能量，并降低了注入信号的功率和微波源和整个微波发生器的成本。

公开(公告)号：US11839705B2

公开(公告)日：2023-12-12

申请号：US17165914

申请日：2021-02-02

Applicant: SICHUAN UNIVERSITY

Inventor： Huacheng Zhu ,  Yang Yang ,  Kama Huang

IPC: A61L9/20

CPC classification number: A61L9/20 ,  A61L2209/14

Abstract: An air purification device able to kill bacteria and viruses is provided, including an air channel, an air pump, a filtering device, and an electrodeless ultraviolet sterilization device. The electrodeless ultraviolet sterilization device is arranged inside the air channel and includes a microwave generator, an electrodeless ultraviolet tube, and a uniform radiator. The uniform radiator is a coaxial cable with gaps provided thereon. The electrodeless ultraviolet tube is a hollow columnar quartz tube. The coaxial cable is arranged in a hollow portion of the quartz tube. The coaxial cable is connected to the to microwave generator. The air purification device has a compact structure. Through arranging the electrodeless ultraviolet sterilization device inside the air channel, large-granular dust in the air is filtered, and meanwhile, bacteria and viruses in the air are effectively killed. Moreover, the present invention is safe and effective and has high sterilization efficiency and a low production cost.

公开(公告)号：US20220136098A1

公开(公告)日：2022-05-05

申请号：US17576794

申请日：2022-01-14

Applicant: Sichuan University

Inventor： Kama Huang ,  Yang Yang ,  Changjun Liu ,  Huacheng Zhu

IPC: C23C14/35 ,  H01J37/34 ,  H01J37/32

Abstract: A method for improving service life of a magnetron, which belongs to the technical field of microwave applications, includes: taking anode working voltage range is taken as n voltage values U1 . . . Un constituting an arithmetic sequence; taking the voltage value as the anode voltage; in each voltage value, adjusting the magnet coil current between I min and Imax by the coil current control part , so that the output power P of the experimental magnetron is equal to the target power P0, and measuring the cathode filament temperature at this time by the temperature measuring part, which is denoted as Ti; measuring all the cathode filament temperatures Ti as the temperature data set corresponding to P0 by the temperature measuring part; taking out the minimum temperature value Tmin in the temperature data set, and using the anode voltage value and the magnet coil current value corresponding to Tmin as the working magnetron, wherein the output power is the anode voltage value and the magnet coil current value of P0. The present invention provides a method for improving the service life of a magnetron, which adjusts the electric field and the magnetic field, finds the synergy between the magnetic field and the electric field, and improves the service life of the magnetron.

公开(公告)号：US20150270091A1

公开(公告)日：2015-09-24

申请号：US14729300

申请日：2015-06-03

Applicant: Sichuan University

Inventor： Kama Huang ,  Changjun Liu ,  Yang Yang ,  Xing Chen ,  Huacheng Zhu

IPC: H01J25/50

CPC classification number: H01J25/50

Abstract: An injection locked magnetron microwave generator with a recycle of spurious energy, relating to a microwave power source, includes a frequency selective reflector for recycling the spurious energy of a magnetron and satisfies locking requirements of an output frequency of a high-output-power magnetron with a low-power injection signal. The microwave generator includes n magnetrons and n locking devices. The locking devices inject locking signals into the corresponding magnetrons. The n locking devices are connected with a microwave source. Output terminals of the magnetrons are connected with corresponding frequency selective reflectors for reflecting the spurious microwave signals outputted by the magnetrons back to the magnetrons. N≧1. The microwave generator, with a simple structure, effectively recycles the spurious energy outputted by the magnetrons, and reduces the power of the injection signal and costs of the microwave source and the overall microwave generator.

Abstract translation: 具有与微波功率源相关的杂散能量再循环的注入锁定磁控管微波发生器包括用于再现磁控管的杂散能量的频率选择性反射器，并且满足高输出功率磁控管的输出频率的锁定要求 低功率注入信号。 微波发生器包括n个磁控管和n个锁定装置。 锁定装置将锁定信号注入到相应的磁控管中。 n个锁定装置与微波源连接。 磁控管的输出端子与相应的频率选择反射器连接，用于将由磁控管输出的杂散微波信号反射回磁控管。 N≥1。 具有简单结构的微波发生器有效地回收了磁控管输出的杂散能量，并降低了注入信号的功率和微波源和整个微波发生器的成本。