A novel self-adaptive, multi-peak detection algorithm for blade tip clearance measurement based on a capacitive probe

Li, Jian; Guo, Guanghui; Duan, Fajie; Niu, Guangyue; Shao, Xingchen; Cong, Zhaotong; Shi, Xiaojiang; Zhong, Zhicai

doi:10.1088/1361-6501/abcad6

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Existing BTC monitoring methods mainly include five kinds of methods: the discharge probe method [6,7], the optical fiber method [8][9][10][11][12], the capacitance method [13][14][15][16][17], the eddy current method [18][19][20][21] and the microwave method [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Synchronous Vibration Parameter Recognition of Constant-Speed Blades Based on Blade Tip Clearance Measurement

Zhang,

Xia,

Chen

et al. 2023

Applied Sciences

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A new method for the synchronous vibration parameter identification of constant-speed rotating blades based on blade tip clearance (BTC) measurement and blade tip timing (BTT) is introduced. A BTC sensor is used to measure the BTC when the blade tip passes through each sensor. The BTT method is used to determine whether the blade tip arrives in advance or lags. The geometric model between the BTC and the blade tip vibration displacement (BTVD) is established, and the BTVD of the blade tip passing through each sensor is obtained. Then, the nonlinear least squares method is used to determine the synchronous vibration parameters of the constant-speed rotating blade. The results show that with an increase in amplitude, the higher the accuracy of the vibration parameter identification proposed in this paper; with a decrease in the random error of the BTC measurement, the higher the accuracy of the vibration parameter identification proposed in this paper; with a decrease in the random error in the measurement of the blade disk dimensions, the higher the accuracy of the vibration parameter identification proposed in this paper. In addition, the smaller the ratio of the blade length to the blade disk radius, the higher the accuracy of the vibration parameter identification method introduced in this paper. Because the structure of the gas turbine compressor and turbine blade disk has a small blade disk ratio, the method proposed in this paper is suitable for the simultaneous vibration parameter identification of gas turbine compressor blades and turbine blades.

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Section: Introductionmentioning

confidence: 99%

Synchronous Vibration Parameter Recognition of Constant-Speed Blades Based on Blade Tip Clearance Measurement

Zhang,

Xia,

Chen

et al. 2023

Applied Sciences

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“…Capacitive measurement technology obtains the blade tip clearance by detecting the change of capacitance between the pole core of the sensor and the blade end face. A capacitance sensor has been developed for tip clearance measurement in harsh environments with a measurement range of 0.3-3 mm and a measurement accuracy of 15 μm [11,12].…”

Section: Introductionmentioning

confidence: 99%

Dynamic and high-speed measurement system for blade tip clearance of engine with optical comb

Han

Wu³

et al. 2022

Front. Phys.

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For blade tip clearance measurement, the optical measurement method has the characteristics of high precision, anti-electromagnetic interference, and non-contact measurement. A dynamic and high-speed blade tip clearance measurement system based on time stretch dispersive Fourier transform with the optical comb is proposed and demonstrated. The dynamic experiments are designed to verify the accuracy of the system. The results show that the measuring speed is up to 17.6 MHz and the measurement errors are less than 1 μm under dynamic conditions. The experiments prove that the system has the advantages of high measurement accuracy, high speed, and good repeatability. It can provide a new tool for engine health monitoring.

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Cell density detection based on a microfluidic chip with two electrode pairs

2022

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Cell density detection is usually the counting of cells in certain volume of liquid, which is an important process in the eld of biomedicine. The Coulter counting method has been an important method for biological cell detection and counting for decades. In this paper, a micro uidic chip based on two electrode pairs is designed, which uses the Coulter principle to detect the ow rate of uncertain volume liquid and count the cells, and then calculate the cell density by statistics. When the cell passes through the sensor channel formed by the electrode pair on the chip, the impedance will change between the electrodes. This phenomenon has been proved by experiments. The designed chip has the advantages of simple structure, small size and low manufacturing cost. The cell density detection method proposed in this article is of great signi cance to the research in the eld of biological cell detection and development of related medical devices.

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A novel self-adaptive, multi-peak detection algorithm for blade tip clearance measurement based on a capacitive probe

Cited by 5 publications

References 26 publications

Synchronous Vibration Parameter Recognition of Constant-Speed Blades Based on Blade Tip Clearance Measurement

Synchronous Vibration Parameter Recognition of Constant-Speed Blades Based on Blade Tip Clearance Measurement

Dynamic and high-speed measurement system for blade tip clearance of engine with optical comb

Cell density detection based on a microfluidic chip with two electrode pairs

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