On measuring key parameters of an electro-impulse deicing system

2018 ◽  
Vol 233 (6) ◽  
pp. 2321-2328 ◽  
Author(s):  
Qian Du ◽  
Chunling Zhu
Keyword(s):  
Measuring Method ◽  
Pulsed Current ◽  
Experimental Setup ◽  
Test Results ◽  
Peak Acceleration ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Peak Current ◽  
Two Parameters ◽  
Piezoelectric Vibration

The peak current and vibration peak acceleration are two important parameters in the electroimpulse deicing system. Available data on two parameters are sparse. An experimental setup to measure the peak current and vibration peak acceleration in the electroimpulse deicing system is presented. The measurement is performed in the icing wind tunnel. Rogowski coil’s principle on pulsed current measurement is applied in the electroimpulse deicing discharge current circuit. It is found that calculated results agree with the measured trend. A piezoelectric vibration acceleration sensor is adopted to measure the vibration peak acceleration. Test results show that when the peak current varies linearly, the vibration peak acceleration increases with the increase of discharge voltages and its variation is approximately linear. The experimental results in the electroimpulse deicing system demonstrate that the proposed measuring method is accurate and reliable.

Research on the Voltage Sensitivity of Differential Cymbal Piezoelectric Vibration Acceleration Sensor

2014 ◽  
Vol 705 ◽  
pp. 208-213
Author(s):  
Hui Gao ◽  
Deng Hua Li ◽  
Bi Zheng Dong
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Output Voltage ◽  
Structural Features ◽  
Order System ◽  
Voltage Sensitivity ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Cymbal Transducer ◽  
Piezoelectric Vibration

To improve the sensor's output voltage sensitivity, two cymbals piezoelectric transducer are employed as the sensitive elements to form a differential cymbal piezoelectric vibration acceleration sensor. The structural features of the sensor are analyzed, second-order system mathematical model is established and the output voltage sensitivity of the sensor is also studied. The experimental results show that output voltage sensitivity of differential cymbals piezoelectric vibration acceleration sensor is two times of that of the sensor with single cymbal transducer. The experimental data agrees well with the theoretical analysis result.

Research on Transverse Sensitivity Property of Cymbal Piezoelectric Vibration Acceleration Sensor

2011 ◽  
Vol 301-303 ◽  
pp. 1495-1500 ◽  
Author(s):  
Cheng Zhe Li ◽  
Deng Hua Li ◽  
Shuang Zhai ◽  
Jin Ao Li
Keyword(s):  
Voltage Sensitivity ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Transverse Sensitivity ◽  
Sensitivity Ratio ◽  
Compensation Methods ◽  
Acceleration Sensors ◽  
Orthogonal Methods ◽  
And Control ◽  
Piezoelectric Vibration

For the problem of higher transverse sensitivity ratio of the cymbal piezoelectric vibration acceleration sensors, a mathematical model of output voltage sensitivity is established which employ orthogonal and array methods to reduce the transverse sensitivity ratio of the piezoelectric vibration acceleration sensor. Two compensation methods are designed. The results showed that the array and orthogonal methods can decrease the effect of the transverse interference of acceleration sensor effectively and control the relative error in a smaller range, improve the measurement accuracy of the sensors.

scholarly journals Effect of Temperature on the Tribological Properties of Selected Thermoplastic Materials Cooperating with Aluminium Alloy

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7318
Author(s):  
Anita Ptak ◽  
Paula Taciak ◽  
Wojciech Wieleba
Keyword(s):  
Aluminium Alloy ◽  
Contact Pressure ◽  
Tribological Properties ◽  
Polymer Materials ◽  
Effect Of Temperature ◽  
Test Results ◽  
Friction Process ◽  
Before And After ◽  
Pin On Disc ◽  
Two Parameters

This article concerns the tribological properties of three selected polymer materials: polyamide PA6, polyethylene PE-HD and polyetheretherketone composite PEEK/BG during sliding against aluminium alloy EN AW-2017A in the presence of hydraulic oil HLP 68. The tests were carried out under contact pressure p of 3.5–11 MPa at ambient temperature T ranging from −20 °C to +20 °C. The dependence of kinetic friction coefficient μk on the two parameters was determined through tribological tests carried out using a pin-on-disc tribometer. A five-level central composite rotatable design (CCRD) was adopted for the experiment. All the test results were statistically analysed. The microhardness of the surface of the polymeric material was measured before and after the friction process. The surface was also examined under SEM. Temperature and contact pressure have been found to have a significant effect on the tribological properties of the tested sliding pairs. Relative to the applied friction conditions, the surfaces after friction showed rather heavy signs of wear.

scholarly journals Fabrication and Characteristic of a Double Piezoelectric Layer Acceleration Sensor Based on Li-Doped ZnO Thin Film

Micromachines ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 331 ◽  
Author(s):  
Chunpeng Ai ◽  
Xiaofeng Zhao ◽  
Sen Li ◽  
Yi Li ◽  
Yinnan Bai ◽  
...  
Keyword(s):  
Thin Film ◽  
Resonance Frequency ◽  
Piezoelectric Layer ◽  
Rf Magnetron Sputtering ◽  
Micro Electro Mechanical System ◽  
Test Results ◽  
Acceleration Sensor ◽  
Piezoelectric Layers ◽  
Mems Technology ◽  
Doped Zno

In this paper, a double piezoelectric layer acceleration sensor based on Li-doped ZnO (LZO) thin film is presented. It is constituted by Pt/LZO/Pt/LZO/Pt/Ti functional layers and a Si cantilever beam with a proof mass. The LZO thin films were prepared by radio frequency (RF) magnetron sputtering. The composition, chemical structure, surface morphology, and thickness of the LZO thin film were analyzed. In order to study the effect of double piezoelectric layers on the sensitivity of the acceleration sensor, we designed two structural models (single and double piezoelectric layers) and fabricated them by using micro-electro-mechanical system (MEMS) technology. The test results show that the resonance frequency of the acceleration sensor was 1363 Hz. The sensitivity of the double piezoelectric layer was 33.1 mV/g, which is higher than the 26.1 mV/g of single piezoelectric layer sensitivity, both at a resonance frequency of 1363 Hz.

scholarly journals Characteristics Research of a High Sensitivity Piezoelectric MOSFET Acceleration Sensor

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4988
Author(s):  
Chunpeng Ai ◽  
Xiaofeng Zhao ◽  
Dianzhong Wen
Keyword(s):  
High Sensitivity ◽  
Oxide Semiconductor ◽  
Voltage Sensitivity ◽  
Test Results ◽  
Acceleration Sensor ◽  
Piezoelectric Beam ◽  
Silicon Cantilever ◽  
Gate Control ◽  
Piezoelectric Acceleration ◽  
Peak Value

In order to improve the output sensitivity of the piezoelectric acceleration sensor, this paper proposed a high sensitivity acceleration sensor based on a piezoelectric metal oxide semiconductor field effect transistor (MOSFET). It is constituted by a piezoelectric beam and an N-channel depletion MOSFET. A silicon cantilever beam with Pt/ZnO/Pt/Ti multilayer structure is used as a piezoelectric beam. Based on the piezoelectric effect, the piezoelectric beam generates charges when it is subjected to acceleration. Due to the large input impedance of the MOSFET, the charge generated by the piezoelectric beam can be used as a gate control signal to achieve the purpose of converting the output charge of the piezoelectric beam into current. The test results show that when the external excitation acceleration increases from 0.2 g to 1.5 g with an increment of 0.1 g, the peak-to-peak value of the output voltage of the proposed sensors increases from 0.327 V to 2.774 V at a frequency of 1075 Hz. The voltage sensitivity of the piezoelectric beam is 0.85 V/g and that of the proposed acceleration sensor was 2.05 V/g, which is 2.41 times higher than the piezoelectric beam. The proposed sensor can effectively improve the voltage output sensitivity and can be used in the field of structural health monitoring.

scholarly journals Development Identification Method of Inertia Properties for Heavy Truck Engine Based on MIMS Test Rig

2018 ◽  
Vol 153 ◽  
pp. 04009 ◽  
Author(s):  
Tianjun Zhu ◽  
Fudong Zhang ◽  
Jianying Li ◽  
Fei Li ◽  
Changfu Zong
Keyword(s):  
Measuring Method ◽  
Test Results ◽  
Test Rig ◽  
New Development ◽  
Inertia Parameters ◽  
Heavy Truck ◽  
Inertia Properties ◽  
Parameters Measurement ◽  
Vehicle Bodies ◽  
Truck Engine

A new development for the accurate measurement of the inertia parameters for heavy truck engine is presented. It is specifically intended for measuring the inertia properties of vehicle bodies, and it has the potential to be applied to the measurement of the properties of vehicle bodies, such as the vehicle powertrain, engine, and gearbox. This paper, based on CATARC MIMS test rig, develops an accurate measuring method to identify inertia parameters of heavy truck engine. Firstly corresponding tests are carried out and the lever principle and moments of inertia parallel theorem are employed to calculate and analyze the test results, which leads to the accurate value of inertia parameters. Secondly the accuracy of proposed method is verified through the calibration system. As a result the method shows high accuracy, which provides an experimental basis for accurate inertia parameters measurement of heavy truck engine.

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