Sensing elements space design of hot-film sensor array considering thermal crosstalk

Sun, Baoyun; Ma, Binghe; Luo, Jian; Li, Boyuan; Jiang, Chengyu; Deng, Jinjun

doi:10.1016/j.sna.2017.08.042

Cited by 21 publications

(16 citation statements)

References 9 publications

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“…The guarding heater of the dual-layer sensor was fabricated in the same way as the single-layer hot film sensor [ 27 ]. Polydimethylsiloxane (PDMS) was spin-coated as an adhesive between the PI foil and the glass carrier.…”

Section: Fabricationmentioning

confidence: 99%

“…The center alignment error of the two-layer structures was less than 0.8 µm, and the total thickness of the dual-layer sensor was within 80 µm. The guarding heater of the dual-layer sensor was fabricated in the same way as the single-layer hot film sensor [27]. Polydimethylsiloxane (PDMS) was spin-coated as an adhesive between the PI foil and the glass carrier.…”

Section: Fabricationmentioning

confidence: 99%

“…The resistance and TCR were two basic parameters of the flexible dual-layer hot film sensors, which were measured in a temperature-test system to ensure that the resistance of the sensor was linear with the temperature as The guarding heater of the dual-layer sensor was fabricated in the same way as the single-layer hot film sensor [27]. Polydimethylsiloxane (PDMS) was spin-coated as an adhesive between the PI foil and the glass carrier.…”

Section: Fabricationmentioning

confidence: 99%

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Highly Sensitive Flow Sensor Based on Flexible Dual-Layer Heating Structures

Yan

Jiang

Chen

et al. 2020

Sensors

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Hot film sensors detect the flow shear stress based on the forced convection heat transfer to the fluid. Current hot film sensors have been significantly hindered by the relatively low sensitivity due to the massive heat conduction to the substrate. This paper describes the design, fabrication, simulation, and testing of a novel flow sensor with dual-layer hot film structures. More specifically, the heat conduction was insulated from the sensing heater to the substrate by controlling both sensing and guarding heaters working at the same temperature, resulting in a higher sensitivity. The experiment and simulation results showed that the sensitivity of the dual-layer hot film sensor was significantly improved in comparison to the single-layer sensor. Additionally, the dual-layer sensor was designed and fabricated in an integrated, flexible, and miniaturized manner. Its small size makes it an excellent candidate for flow detection.

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Section: Fabricationmentioning

confidence: 99%

Section: Fabricationmentioning

confidence: 99%

Section: Fabricationmentioning

confidence: 99%

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Highly Sensitive Flow Sensor Based on Flexible Dual-Layer Heating Structures

Yan

Jiang

Chen

et al. 2020

Sensors

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“…The detection found that the velocity vectors in the range of 0°-180°could be measured by three sensors with a 30°distribution. Figure 8(b) shows a flexible one-way thermal sensor for measuring the flow magnitude and shear stress on the surface of the wind tunnel model [150]. It was fabricated through flexible electronics technology determined minimum non-thermal crosstalk spaces between two adjacent elements.…”

Section: Flexible Flow Sensorsmentioning

confidence: 99%

Flexible smart sensing skin for “Fly-by-Feel” morphing aircraft

Huang

Zhu

Xiong

et al. 2021

Sci. China Technol. Sci.

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Flexible smart sensing skin is a key enabling technology for the future "Fly-by-Feel" control of morphing aircraft. It represents the next-generation skin of aircraft that can exhibit a more powerful sensing function than a conventional one and could be mounted on arbitrary curvilinear surfaces, especially for advanced autonomic, morphing aircraft. Recent significant technical advances in flexible electronics have overcome many historic drawbacks of conventional smart skin, e.g., only a limited number of discrete block sensors can be integrated due to the inevitable structural damage and heavy guidelines. Herein, we review the key developments in flexible sensors technology and highlight both the state-of-the-art devices and the potential applications for the measurement of aircraft. We begin with the importance of flexible smart skin for morphing aircraft and then expand to the latest progress in various types of flexible sensors. Then we highlight flexible sensors as smart skin to measure aerodynamic parameters and monitor the structural health, and further to achieve the Fly-by-Feel control. Finally, the challenges and opportunities on flexible smart sensing skin are discussed, from the functional design to practical applications.

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“…The fabrication processes of the flexible hot-film sensor array are shown in Figure 2 [ 19 ]. A ready-made polyimide (PI) foil in the thickness of 50 μm is used as the sensor substrate.…”

Section: Flexible Hot-film Sensormentioning

confidence: 99%

A Flexible Hot-Film Sensor Array for Underwater Shear Stress and Transition Measurement

Sun

Wang

Luo

et al. 2018

Sensors

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A flexible hot-film sensor array for wall shear stress, flow separation, and transition measurement has been fabricated and implemented in experiments. Parylene C waterproof layer is vapor phase deposited to encapsulate the sensor. Experimental studies of shear stress and flow transition on a flat plate have been undertaken in a water tunnel with the sensor array. Compared with the shear stress derived from velocity profile and empirical formulas, the measuring errors of the hot-film sensors are less than 5%. In addition, boundary layer transition of the flat plate has also been detected successfully. Ensemble-averaged mean, normalized root mean square, and power spectra of the sensor output voltage indicate that the Reynolds number when transition begins at where the sensor array located is 1.82 × 105, 50% intermittency transition is 2.52 × 105, and transition finishes is 3.96 × 105. These results have a good agreement with the transition Reynolds numbers, as measured by the Laser Doppler Velocimetry (LDV) system.

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Sensing elements space design of hot-film sensor array considering thermal crosstalk

Cited by 21 publications

References 9 publications

Highly Sensitive Flow Sensor Based on Flexible Dual-Layer Heating Structures

Highly Sensitive Flow Sensor Based on Flexible Dual-Layer Heating Structures

Flexible smart sensing skin for “Fly-by-Feel” morphing aircraft

A Flexible Hot-Film Sensor Array for Underwater Shear Stress and Transition Measurement

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