Cost-effective test set-up for the real-time measurement of the triboelectric energy harvester

Journal of Vibration and Control ◽

10.1177/10775463211056400 ◽

2021 ◽

pp. 107754632110564

Author(s):

Amit Sharma ◽

Poonam Agarwal

Keyword(s):

Real Time ◽

Energy Harvester ◽

Cost Effective ◽

Time Measurement ◽

The Real ◽

Precise Control ◽

Real Time Measurement ◽

Input Parameters ◽

Set Up ◽

The Impact

Operational parameters, the force and the frequency of contact affect the triboelectric energy harvester output performance. There is a need for the precise control of input parameters and the real-time measurement of the output parameter to quantify the effect of operating parameters. In this paper, an in-house developed cost-effective experimental set-up (approximately $2600) is presented, enabling the variation in contact frequency and measures of the impact force, voltage and current in real-time. The percentage of uncertainty in the measurement of voltage, current and force are 1.63%, 1.29% and 1.83%, respectively. The proposed set-up can be used to perform a reliable performance analysis and comparison of the vertical contact-separation mode triboelectric energy harvesters by real-time measurement of input and output parameters with precise control of input parameters.

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Real-Time Measurement of Drilling Fluid Rheological Properties: A Review

Sensors ◽

10.3390/s21113592 ◽

2021 ◽

Vol 21 (11) ◽

pp. 3592

Author(s):

Naipeng Liu ◽

Di Zhang ◽

Hui Gao ◽

Yule Hu ◽

Longchen Duan

Keyword(s):

Decision Making ◽

Rheological Properties ◽

Real Time ◽

Drilling Fluid ◽

Time Measurement ◽

Decision Making Process ◽

Rate Of Penetration ◽

The Real ◽

Real Time Measurement ◽

Fluid Properties

The accurate and frequent measurement of the drilling fluid’s rheological properties is essential for proper hydraulic management. It is also important for intelligent drilling, providing drilling fluid data to establish the optimization model of the rate of penetration. Appropriate drilling fluid properties can improve drilling efficiency and prevent accidents. However, the drilling fluid properties are mainly measured in the laboratory. This hinders the real-time optimization of drilling fluid performance and the decision-making process. If the drilling fluid’s properties cannot be detected and the decision-making process does not respond in time, the rate of penetration will slow, potentially causing accidents and serious economic losses. Therefore, it is important to measure the drilling fluid’s properties for drilling engineering in real time. This paper summarizes the real-time measurement methods for rheological properties. The main methods include the following four types: an online rotational Couette viscometer, pipe viscometer, mathematical and physical model or artificial intelligence model based on a Marsh funnel, and acoustic technology. This paper elaborates on the principle, advantages, limitations, and usage of each method. It prospects the real-time measurement of drilling fluid rheological properties and promotes the development of the real-time measurement of drilling rheological properties.

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