Configuration of a Self-Heated Double Wheatstone Bridge for 2-D Wind Sensors

Gao, Shixuan; Yi, Zhenxiang; Ye, Yizhou; Qin, Ming; Huang, Qing‐An

doi:10.1109/jmems.2018.2883131

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…The sensor shape is a cylindrical or spherical structure so that the wind velocity and direction are measured from the DPs at multiple inlets in the surface [ 13 , 14 , 15 , 16 , 17 , 18 ]. Although it was thought that miniaturization was difficult due to the complicated housing shape, a compact 2D airflow sensor was developed by placing a thermal sensor element inside [ 19 , 20 , 21 , 22 ]. Similarly, it is expected that an airflow sensor that fulfills the required specifications for a drone is realized by minute built-in mechanical DP sensors inside the housing [ 17 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Compact Sphere-Shaped Airflow Vector Sensor Based on MEMS Differential Pressure Sensors

Haneda

Matsudaira

Noda

et al. 2022

Sensors

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This paper presents an airflow vector sensor for drones. Drones are expected to play a role in various industrial fields. However, the further improvement of flight stability is a significant issue. In particular, compact drones are more affected by wind during flight. Thus, it is desirable to detect air current directly by an airflow sensor and feedback to the control. In the case of a drone in flight, the sensor should detect wind velocity and direction, particularly in the horizontal direction, for a sudden crosswind. In addition, the sensor must also be small, light, and highly sensitive. Here, we propose a compact spherical airflow sensor for drones. Three highly sensitive microelectromechanical system (MEMS) differential pressure (DP) sensor chips were built in the spherical housing as the sensor elements. The 2D wind direction and velocity can be measured from these sensor elements. The fabricated airflow sensor was attached to a small toy drone. It was demonstrated that the sensor provided an output corresponding to the wind velocity and direction when horizontal wind was applied via a fan while the drone was flying. The experimental results demonstrate that the proposed sensor will be helpful for directly measuring the air current for a drone in flight.

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Section: Introductionmentioning

confidence: 99%

Compact Sphere-Shaped Airflow Vector Sensor Based on MEMS Differential Pressure Sensors

Haneda

Matsudaira

Noda

et al. 2022

Sensors

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“…Resistive MEMS sensors are used in various applications such as strain gauges, pressure sensors, acceleration sensors, and force sensors. (1)(2)(3)(4)(5) For the implementation of a highprecision sensor interface circuit for these high-performance resistive sensors, low noise, low offset, and high input impedance are required. There are two general architectures for a resistive sensor interface circuit: a current-feedback instrumentation amplifier (CFIA) and a 3-opamp voltage feedback instrumentation amplifier (IA).…”

Section: Introductionmentioning

confidence: 99%

Chopper-stabilized Multipath Instrumentation Amplifier with Output Voltage Offset Compensation Using R-2R Digital-to-Analog Converter

Heo¹,

Kim²,

You³

et al. 2021

Sensors and Materials

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This paper presents a 3-opamp resistive bridge sensor analog front-end (AFE) integrated circuit (IC) with offset voltage compensation using an R-2R digital-to-analog converter (DAC). The proposed IC is implemented with a 3-opamp instrumentation amplifier (IA) to achieve high gain, high input impedance, and linearity. The two amplifiers in the first stage are multipath amplifiers with a chopper stabilization technique and ripple reduction loop (RRL). The chopper stabilization technique reduces 1/f flicker noise and DC offset, and the RRL mitigates the output ripple voltage resulting from the chopper stabilization technique. The multipath amplifier scheme compensates the notch characteristic in the frequency response caused by the RRL. A fully differential amplifier with a class-AB output stage is used in the second stage to achieve power efficiency. The 12-bit R-2R DAC is implemented to compensate the offset of the secondstage output of the IA. The IA gain can be controlled from 12 to 48 dB using 2-bit and 3-bit programmable feedback resistor arrays in the first and second stages, respectively. The proposed IC is designed with a 0.18 μm complementary metal-oxide-semiconductor (CMOS) process and has an active area of 7.2 mm 2 . The simulated input-referred noise is 36.7 nV/√Hz at a frequency of 1 Hz and the simulated input offset voltage is 2.2 μV.

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“…Wheatstone bridges are low cost sensors that are used for measuring the very low resistance values precisely. Applications include calculations of hydrogene levels or gases levels in a recipient [38,39], in order to measure the wind speed and direction [40] or for tactile touch monitoring [41]. Accordingly, with these sensors, the system obtained the state of the bathrooms.…”

Section: Introductionmentioning

confidence: 99%

Multi-Agent Approach Using LoRaWAN Devices: An Airport Case Study

et al. 2020

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The current situation with COVID-19 is changing our courses of action toward ensuring health security. This is particularly crucial in airports, which usually receive more than 300,000 travellers in one single day. In this work, we present an Internet of Things (IoT) network to monitor the status of toilets and improve their maintenance. The system is based on IoT networks with different sensors to control soap levels, room capacity, distances, temperature, and humidity. This information is processed by a multi-agent system that detects possible anomalies and makes decisions accordingly. A case study in a real environment is developed in order to demonstrate the usefulness of the system. The results show that the proposed method can be used to successfully manage and control airport toilets.

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Configuration of a Self-Heated Double Wheatstone Bridge for 2-D Wind Sensors

Cited by 12 publications

References 18 publications

Compact Sphere-Shaped Airflow Vector Sensor Based on MEMS Differential Pressure Sensors

Compact Sphere-Shaped Airflow Vector Sensor Based on MEMS Differential Pressure Sensors

Chopper-stabilized Multipath Instrumentation Amplifier with Output Voltage Offset Compensation Using R-2R Digital-to-Analog Converter

Multi-Agent Approach Using LoRaWAN Devices: An Airport Case Study

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