An optical fiber Bragg grating and piezoelectric ceramic voltage sensor

Yang, Qing; He, Yanxiao; Sun, Shangpeng; Luo, Mandan; Han, Rui

doi:10.1063/1.4986046

Cited by 26 publications

(12 citation statements)

References 17 publications

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“…path, reduce the influence of the ambient light very well [14][15][16][17][18][19][20] and to compact the structure of the urine analyzer. Moreover, the temperature sensor is used to detect environment temperature for calibrating the test results.…”

Section: Jinst 13 T07002mentioning

confidence: 99%

A portable analyzer based on a novel optical structure for urine dry-chemistry analysis

Liu

et al. 2018

J. Inst.

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A portable urine analyzer, based on a novel optical structure, a high-performance 32-bit microcontroller STM32F103VE and a WiFi module, is put forward for urine dry-chemistry analysis in this paper. In the analyzer, the optical structure, made up of optical fiber bundles, is helpful to control the spread path of light and to reduce influence of ambient light on test results effectively. Meanwhile, through our designed optical structure, the intensity of both irradiating light from white LED and reflected light from urine reagent strip can be measured synchronously by two color sensors. And this is useful to enhance the degree of automation availably and to further improve test accuracy of the urine analyzer. Furthermore, a temperature sensor is also used to measure environment temperature for calibrating the test results of the analyzer. In addition, a high-precision reference voltage chip, LM4132A-3.0, which provides a reference voltage for analog-digital and digital-analog converters integrated in STM32F103VE, is adopted to improve both the measurement precision of light intensity and the control accuracy of outputted analog signals. Consequently, by the 14-item urinalysis reagent strip, the analyzer is able to obtain fourteen indexes of human urine, to display and print the composite reflectivity or semi-quantitative result of each test item. Besides, it also can output all results, covering above mentioned two kinds of results, each color-component reflectivity and all original data of the latest tested strip through WiFi module. To validate the performance of the analyzer, 200 real human urine samples were tested by our designed analyzer and a commercial one simultaneously. The results show that the urine analyzer has a good stability and a great consistency with the commercial one. Therefore, our designed analyzer has a good application prospect in the communities and families.

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Section: Jinst 13 T07002mentioning

confidence: 99%

A portable analyzer based on a novel optical structure for urine dry-chemistry analysis

Liu

et al. 2018

J. Inst.

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“…Yang et al [11] tested their setup with sinusoidal, square and triangular input signals at frequencies of 50 Hz, 3 kHz and 8 kHz. To generate the input signals, a signal generator connected to an amplifier was used.…”

Section: Introductionmentioning

confidence: 99%

Optical Voltage Transformer Based on FBG-PZT for Power Quality Measurement

Gonçalves

Werneck

2021

Sensors

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Optical Current Transformers (OCTs) and Optical Voltage Transformers (OVTs) are an alternative to the conventional transformers for protection and metering purposes with a much smaller footprint and weight. Their advantages were widely discussed in scientific and technical literature and commercial applications based on the well-known Faraday and Pockels effect. However, the literature is still scarce in studies evaluating the use of optical transformers for power quality purposes, an important issue of power system designed to analyze the various phenomena that cause power quality disturbances. In this paper, we constructed a temperature-independent prototype of an optical voltage transformer based on fiber Bragg grating (FBG) and piezoelectric ceramics (PZT), adequate to be used in field surveys at 13.8 kV distribution lines. The OVT was tested under several disturbances defined in IEEE standards that can occur in the electrical power system, especially short-duration voltage variations such as SAG, SWELL, and INTERRUPTION. The results demonstrated that the proposed OVT presents a dynamic response capable of satisfactorily measuring such disturbances and that it can be used as a power quality monitor for a 13.8 kV distribution system. Test on the proposed system concluded that it was capable to reproduce up to the 41st harmonic without significative distortion and impulsive surges up to 2.5 kHz. As an advantage, when compared with conventional systems to monitor power quality, the prototype can be remote-monitored, and therefore, be installed at strategic locations on distribution lines to be monitored kilometers away, without the need to be electrically powered.

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“…The measurement of voltage or electric field plays a significant role to detect fault and monitor state of many facilities in the fields such as medical treatment, intelligent grid, telecom, transport, chemical industry production [12]- [14]. Voltage sensors have been studied by many methods like piezoelectric effect, electrostrictive effect, Pockels effect or other physical effect [14]- [24], while they usually comprise a large bulk crystal, ceramic and polymer which lead them to have some drawbacks, such as heavy weight, large size and poor stability, making the sensors unsuitable for voltage detection in hardlyaccessible environments.…”

Section: Introductionmentioning

confidence: 99%

Electrically Sensing Characteristics of the Sagnac Interferometer Embedded With a Liquid Crystal-Infiltrated Photonic Crystal Fiber

Liu

Xue

et al. 2021

IEEE Trans. Instrum. Meas.

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The electrically sensing characteristics of a liquidcrystal-infiltrated polarization-maintaining photonic crystal fiber have been studied. The small holes on the end face of the fiber collapse and two large holes remain open by controlling dischargingtime, -current and -position of a fiber splicer, then liquid crystal is selectively infiltrated into the two large holes which can not only save liquid crystal, but also make the welding between the liquidcrystal-infiltrated polarization-maintaining photonic crystal fiber and single-mode fiber much easier. A new method to weld the two fibers is proposed by filling and volatilizing ethanol to make liquid crystal a few millimeters away from the end face which can improve the sensing system stability and prevent the discharge of a fiber splicer from destroying LC molecules. A Sagnac interferometer is set up by embedding the liquidcrystal-infiltrated polarization-maintaining photonic crystal fiber in a fiber loop and then its electroresponse characteristics are studied. The refractive-index distribution of the liquid-crystalinfiltrated polarization-maintaining photonic crystal fiber varies with electric voltage due to the variable index of liquid crystal which makes it possible to detect voltage. Three voltage ranges are discussed by the different dips and the sensitivity is improved with voltage increasing. The high sensitivity is up to 3.49 nm/V with the tuning range of 7 nm as voltage changes from 149.67 to 151.61 V. The Sagnac interferometer embedded with a liquidcrystal-infiltrated polarization-maintaining photonic crystal fiber can be utilized as a voltage sensor, electro-optical modulator or filter.

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An optical fiber Bragg grating and piezoelectric ceramic voltage sensor

Cited by 26 publications

References 17 publications

A portable analyzer based on a novel optical structure for urine dry-chemistry analysis

A portable analyzer based on a novel optical structure for urine dry-chemistry analysis

Optical Voltage Transformer Based on FBG-PZT for Power Quality Measurement

Electrically Sensing Characteristics of the Sagnac Interferometer Embedded With a Liquid Crystal-Infiltrated Photonic Crystal Fiber

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