North University of China

Other

Jijun Xiong

Qiulin Tan

Lei Zhang

Wenyi Liu

Wendong Zhang

Pinggang Jia

Helei Dong

Yingping Hong

Xiaorui Liang

Chenyang Xue

Jia Liu

Qianyu Ren

Ting Liang

Yanyan Niu

Guocheng Fang

Linggang Guan

Xiangrong Li

Guojun Zhang

Hua Ren

Chen Li

Xiaoyao Wang

Junqi Pang

Xibao Liu

Jiao Xu

Boshan Sun

Guowen An

The present disclosure discloses a surface acoustic wave temperature sensor and a manufacturing method thereof. The surface acoustic wave temperature sensor includes a sensing module and an antenna module electrically connected to each other. The antenna module includes a first high-temperature-resistant substrate and a patterned antenna formed on a surface of the first high-temperature-resistant substrate, a recess is formed in a first surface of the first high-temperature-resistant substrate, and the sensing module is fixed in the recess. The sensing module and the antenna module of the surface acoustic wave temperature sensor provided by the present disclosure form a whole. Therefore, compared with the prior art, the volume is greatly reduced, and wireless passive temperature monitoring in a high-temperature and narrow space can be better implemented. Moreover, the sensing module can be integrated in the antenna module, and such a structure is more convenient for batch processing.

Manufacturing method for a surface acoustic wave temperature sensor

The application belongs to the technical field of signal acquisition, and discloses a stacked large-capacity signal acquisition and transmission system, which includes an adapter board, n acquisition boards, central control boards and a communication board sequentially laminated; where a circuit structure of each of the acquisition boards is the same; the adapter board is provided with circuit board interfaces and a plurality of first board-level connectors; an m-th acquisition board is provided with a signal acquisition and conditioning module, at least n−m+1 second board-level connectors and at least m third board-level connectors; the central control board is provided with a signal conversion module, at least one fourth board-level connector and at least one fifth board-level connector.

Stacked large-capacity signal acquisition and transmission system and design method thereof

A method for measuring surface temperature of a turbine blade includes following steps: step 1: cleaning a turbine blade and blowing dry; step 2: firstly, preparing a NiCrAlY (nickel-chromium-aluminum-yttrium) buffer layer and then preparing an YSZ (yttria-stabilized zirconia) insulating layer; step 3, preparing alumina sol; step 4, preparing an alumina insulating layer; step 5, preparing a strip-shaped platinum electrode layer; step 6, preparing a platinum-filled lead wire; step 7: firstly, connecting a platinum wire to a surface of a tail end of the strip-shaped platinum electrode layer, and then connecting a nickel-chromium alloy wire to a tenon end of the turbine blade; step 8, preparing alumina protective layers; and step 9, connecting two cold junctions of a thermocouple with a data collector.

Method for measuring surface temperatures of turbine blade

Some embodiments of the disclosure provide a demodulation system for obtaining phase change parameters by a fiber-optic Fabry Perot sensor. In an embodiment, the demodulation system includes a transmitting module, a fiber-optic Fabry Perot sensor, a light splitting module, a filter module, a receiving module, and a processing module. The transmitting module transmits a beam with a predetermined wavelength range. The fiber-optic Fabry Perot sensor receives the beam and forms a reflected light beam. The light splitting module is arranged between the transmitting module and the fiber-optic Fabry Perot sensor. The filter module obtains the first light beam, the second light beam, and the third light beam. The filter module has a broadband filter. The receiving module receives the first light beam, the second light beam, and the third light beam and converts them into the first signal, the second signal, and the third signal.

Demodulation system and demodulation method of fiber-optic sensor for obtaining phase change parameters

Some embodiments of the disclosure provide an optical fiber Fabry-Perot sensor (), and a manufacturing method thereof. According to an embodiment, the optical fiber Fabry-Perot sensor () includes a hollow tube body (), a first optical fiber (), and a second optical fiber (). The hollow tube body () has a first tube body (), a cavity portion (), and a second tube body () sequentially arranged in an axial direction. The first optical fiber () is provided within the first tube body () in the axial direction and has a first light guide end face () provided within the cavity portion (). The second optical fiber () is provided in the second tube body () in the axial direction and has a second light guide end face () provided within the cavity portion ().

Optical fiber Fabry-Perot sensor, and manufacturing method thereof

A pressure-sensitive chip, a pressure sensor, and a pressure monitoring system. In an embodiment, a pressure-sensitive chip and a signal processing module are packaged to form a pressure sensor. The pressure sensor and a display instrument are connected to form a pressure monitoring system. A pressure-sensitive chip is a ceramic body made of eight green ceramic sheets by stacking and sintering, and includes two capacitors. In another embodiment, a pressure signal of a measurement area is obtained by a method including the following steps: sensing a pressure in a measurement area by the pressure-sensitive chip; generating a capacitance signal by the pressure-sensitive chip; converting the capacitance signal to a voltage signal by the signal processing module; and converting the voltage signal into the pressure signal by the display instrument.

Pressure-sensitive chip, pressure sensor, and pressure monitoring system

The invention discloses a silicon-based monolithic integrated sonar array which includes a cantilevered sensing array structure, a sound-transparent jacket, and a support structure. The cantilevered sensing array structure is fixed on the support structure and in the sound-transparent jacket, wherein the sound-transparent jacket is filled with insulating dielectric oil, and the cantilevered sensing array structure is immersed in the insulating dielectric oil. The sound-transparent jacket is sealed and is treated with water tightness processing. The array can be applied into devices for underwater ultrasonic imaging, ultrasonic ranging, torpedo navigating, etc.

Silicon-based monolithic integrated sonar array

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Taiyuan, China

Jijun Xiong