A Novel Miniaturised Sensor for Combined Static and Dynamic Pressure Measurements in Harsh Environments

Zarfl, C.; Schmid, P.; Schmid, U.

doi:10.1016/j.proeng.2016.11.255

Cited by 10 publications

(6 citation statements)

References 5 publications

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“…combined dynamic and static pressure sensing in extreme environments in gas turbine engines using piezoelectric crystals used in combination with strain gauges. [ 171 ] A MEMS diaphragm with platinum strain gauges in a Wheatstone bridge configuration was used to monitor static pressure at elevated temperatures, with two piezoelectric single crystals used to provide accurate dynamic pressure measurements, see Figure a. The housing of the sensor was designed in a double, concentric membrane configuration such that deformation of the outer membrane led to a change in pressure on the piezoelectric, and the deformation of the inner membrane was sensed via the piezoresistive strain gauges.…”

Section: Operating Principles Of Sensors Relevant To Hydraulic Systemsmentioning

confidence: 99%

Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives

Liu,

Yuan,

Matias

et al. 2024

Advanced Sensor Research

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Hydraulic fluid power systems are essential for a range of engineering applications such as transportation, heavy industry, and robotics. The scale of the industry is such that hydraulic pumps are estimated to account for 15% of all the energy consumption in the European Union and yet the average efficiency of fluid power systems is only 22%. The digitalization of hydraulic systems offers significant advantages in terms of energy efficiency, performance, reduced maintenance, and automation. However, this requires advances in the integration of smart sensing technologies to provide real‐time feedback on the operation and health of hydraulic components. This review details developing trends in hydraulic fluid power research and provides an overview of progress related to the digitalization of these systems and their integration within an Industry 4.0 framework. The fundamentals of relevant sensor technologies and innovative approaches for integrating sensors into hydraulics systems are discussed. Methods to deliver power to the sensors and associated electronics through harvested pressure ripples are also reviewed. An outlook with respect to future directions in this field is given, including an assessment of the potential for exploiting advanced manufacturing technologies, in particular additive manufacturing, to facilitate successful sensor integration into hydraulic fluid power systems.

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Section: Operating Principles Of Sensors Relevant To Hydraulic Systemsmentioning

confidence: 99%

Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives

Liu,

Yuan,

Matias

et al. 2024

Advanced Sensor Research

View full text Add to dashboard Cite

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“…The limitations of the strain gauge type pressure sensor used in harsh environments are discussed in detail by Bogue (2012). Generally, the static test environment is harsh and the sensors are subjected to hightemperature, transient pressure, shock and vibration (Zhang et al, 2018;Fricke et al, 2012;Cullinane and Strange, 1999;William and Gary, 2013;Zarfl et al, 2016). Further, in the static test environment, the pressure sensor output voltage depends not only on the applied pressure but also on the other factors such as ambient temperature, shock and vibration (Dalgin and Dogru, 2016;Cullinane and Strange, 1999;Kim et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Design, performance evaluation and analysis of the inlet tube of pressure sensor for chamber pressure measurement

Gobi

Kannapiran

Devaraj

et al. 2019

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Purpose In Aerospace applications, the inlet tubes are used to mount strain gauge type pressure sensors on the engine under static test to measure engine chamber pressure. This paper aims to focus on the limitations of the inlet tube and its design aspects to serve better in the static test environment. The different sizes of the inlet tubes are designed to meet the static test and safety requirements. This paper presents the performance evaluation of the designed inlet tubes with calibration results and the selection criteria of the inlet tube to measure combustion chamber pressure with the specified accuracy during static testing of engines. Design/methodology/approach Two sensors, specifically, one cavity type pressure sensor with the inlet tube of range 0-6.89 MPa having natural frequency of the diaphragm 17 KHz and another flush diaphragm type pressure sensor of the same range having −3 dB frequency response, 5 KHz are mounted on the same pressure port of the engine under static test to study the shortcomings of the inlet tube. The limitations of the inlet tube have been analyzed to aid the tube design. The different sizes of inlet tubes are designed, fabricated and tested to study the effect of the inlet tube on the performance of the pressure sensor. The dynamic calibration is used for this purpose. The dynamic parameters of the sensor with the designed tubes are calculated and analyzed to meet the static test requirements. The diaphragm temperature test is conducted on the representative hardware of pressure sensor with and without inlet tube to analyze the effect of the inlet tube against the temperature error. The inlet tube design is validated through the static test to gain confidence on measurement. Findings The cavity type pressure sensor failed to capture the pressure peak, whereas the flush diaphragm type pressure sensor captured the pressure peak of the engine under a static test. From the static test data and dynamic calibration results, the bandwidth of cavity type sensor with tube is much lower than the required bandwidth (five times the bandwidth of the measurand), and hence, the cavity type sensor did not capture the pressure peak data. The dynamic calibration results of the pressure sensor with and without an inlet tube show that the reduction of the bandwidth of the pressure sensor is mainly due to the inlet tube. From the analysis of dynamic calibration results of the sensor with the designed inlet tubes of different sizes, it is shown that the bandwidth of the pressure sensor decreases as the tube length increases. The bandwidth of the pressure sensor with tube increases as the tube inner diameter increases. The tube with a larger diameter leads to a mounting problem. The inlet tube of dimensions 6 × 4 × 50 mm is selected as it helps to overcome the mounting problem with the required bandwidth. From the static test data acquired using the pressure sensor with the selected inlet tube, it is shown that the selected tube aids the sensor to measure the pressure peak accurately. The designed inlet tube limits the diaphragm temperature within the compensated temperature of the sensor for 5.2 s from the firing of the engine. Originality/value Most studies of pressure sensor focus on the design of a sensor to measure static and slow varying pressure, but not on the transient pressure measurement and the design of the inlet tube. This paper presents the limitations of the inlet tube against the bandwidth requirement and recommends dynamic calibration of the sensor to evaluate the bandwidth of the sensor with the inlet tube. In this paper, the design aspects of the inlet tube and its effect on the bandwidth of the pressure sensor and the temperature error of the measured pressure values are presented with experimental results. The calibration results of the inlet tubes with different configurations are analyzed to select the best geometry of the tube and the selected tube is validated in the static test environment.

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“…In Aerospace applications, strain gauge type pressure sensors play a vital role in pressure measurement due to their excellent repeatability and reliability [1][2][3] . In strain gauge type pressure sensor, diaphragm converts applied pressure into proportional strain.…”

Section: Introductionmentioning

confidence: 99%

Design, Development and Performance Evaluation of Eddy Current Displacement Sensor Based Pressure Sensor with Target Temperature Compensation

et al. 2018

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In Aerospace applications, pressure measurement plays a vital role as it serves as one of the input to onboard controller to aid decision- making on initiating or terminating some of the critical events. In this paper, the design aspects of pressure sensor using linear eddy current displacement sensor (ECDS) are presented along with its performance evaluation. The static calibration is carried out to select the best position of ECDS in the proposed pressure sensor. The effect of target temperature on sensor output is presented with test results to aid compensation. A compensation algorithm is developed to minimise the error due to target temperature. The developed compensation algorithm is validated using thermal calibration. The designed pressure sensor is calibrated using Arson dynamic pressure calibrator to evaluate its bandwidth. The calibration results are analysed to aid future sensor design towards improvement of accuracy, bandwidth and miniaturisation.

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A Novel Miniaturised Sensor for Combined Static and Dynamic Pressure Measurements in Harsh Environments

Cited by 10 publications

References 5 publications

Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives

Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives

Design, performance evaluation and analysis of the inlet tube of pressure sensor for chamber pressure measurement

Design, Development and Performance Evaluation of Eddy Current Displacement Sensor Based Pressure Sensor with Target Temperature Compensation

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