Simulation of Fibre Bragg Grating as Strain Sensor for Property Intrusion

This study will demonstrate a strain sensor based on the optical Fibre Bragg Grating (FBG) sensing technology as it is known to have stable and reliable wavelength and response as function of the applied strain. This kind of sensor can perform accurate measurements of small ground vibration and monitor seismic activity thanks to their high sensitivity to dynamic strains induced by acceleration variation which can use to prevent property intrusion or burglary. To understand the FBG sensor more, few of its characteristics such as strain, spectral reflectivity and bandwidth and their connection with the fibre grating length and refractive index is being studied. Keywords: Fibre Bragg Grating(FBG); strain sensor; strain; spectral reflectivity; bandwidth; fibre grating length; refractive index; safety; property intrusion.

ANALISIS DATA INPUT FORCE PADA SHOCK ABSORBER DENGAN STRAIN GAUGE UNTUK MENGETAHUI PEMBEBANAN AKTUAL PADA MOBIL

Dalam dunia desain otomotif, khusunya pada bagian bodi kendaraan, diperlukan struktur yang kuat guna menjamin desain yang akan dijual ke masyarakat akan kuat dan tahan lama terhadap berbagai macam medan jalanan [7]. Untuk mengetahui seberapa besar gaya yang terjadi pada bodi kendaraan, dilakukan pengukuran input force di jalan secara aktual untuk mengetahui beban aktual yang membebani bodi kendaraan mengunakan sensor strain gauge. Tujuan dari penelitian ini adalah menganalisis pembebanan aktual pada bodi mobil secara teoritis (simulasi) dan aktual (pengujian). Penelitian dilakukan dengan melakukan simulasi pembebanan pada mobil menggunakan software DCS-100A dan DAS 100-A kemudian juga dilakukan pengujian aktual yang timbul di jalan sehingga diperoleh data dari keduanya dan dilakukan analisis perbandingan. Dari penelitian ini diharapkan dapat diperoleh data besarnya gaya aktual yang timbul pada berbagai macam medan jalan. Untuk kemudian ini dijadikan target pengembangan produk.

PENGGUNAAN STRAIN GAUGE SEBAGAI KENDALI KURSI RODA

Perkembangan teknologi yang cukup pesat mendorong semua proses manual pada zaman sekarang ini menjadi proses otomatis. Tidak terkecuali dalam hal alat bantu berjalan seperti kursi roda. Oleh karena itu, penelitian merancang alat kursi roda elektrik cukup hangat untuk di bahas. Kursi roda elektrik yang pergerakannya dikontrol langsung oleh pengguna, menggabungkan perangkat keras dan perangkat lunak. Penelitian ini menggunakan motor penggerak yang sepenuhnya dikontrol oleh sensor strain gauge. Kemudian dipasang dengan tombol gerak pada jari pengguna kursi roda sebagai pengontrol utama. Beberapa parameter yang digunakan dalam menentukan tombol maju, mndur, kiri, kanan dan stop adalah nilai sensitivitas, linearitas, respon time, dan kalibrasi yang sesuai referensi ideal sensor. Hasil penelitian ini memberikan nilai hambatan rata – rata rentang 344.65 - 354.65 (ohm), Sensitivitas tegangan sebesar 0.0612 - 0.0617 (volt), sensitivitas tegangan terhadap indek tekuk dengan grafik yang linear, dan respon time tiap 1 (satu) detik didapatkan rata-rata perubahan voltase dari -0.0054 sampai dengan 0.3574 volt. Dan hasil ini merupakan nilai yang baik dalam rentang referensi sensor ideal. Sehingga dapat selanjutnya digunakan untuk nilai pemetaan jari-jari yang digunakan untuk mengontrol arah pada program mikrokontroler kursi roda dielektriknya.

Liquid Metal Based Flexible and Implantable Biosensors

Biosensors are the core elements for obtaining significant physiological information from living organisms. To better sense life information, flexible biosensors and implantable sensors that are highly compatible with organisms are favored by researchers. Moreover, materials for preparing a new generation of flexible sensors have also received attention. Liquid metal is a liquid-state metallic material with a low melting point at or around room temperature. Owing to its high electrical conductivity, low toxicity, and superior fluidity, liquid metal is emerging as a highly desirable candidate in biosensors. This paper is dedicated to reviewing state-of-the-art applications in biosensors that are expounded from seven aspects, including pressure sensor, strain sensor, gas sensor, temperature sensor, electrical sensor, optical sensor, and multifunctional sensor, respectively. The fundamental scientific and technological challenges lying behind these recommendations are outlined. Finally, the perspective of liquid metal-based biosensors is present, which stimulates the upcoming design of biosensors.

A water destructible SnS2 QD/PVA film based transient multifunctional sensor and machine learning assisted stimulus identification for non-invasive personal care diagnostics

We demonstrate, for the first time, a transient, flexible multifunctional sensor (strain, pressure, and breath) using a water soluble SnS2-QD/PVA film.

FBG sensor strain performance analysis using optisystem software too

<span>Fibre Bragg Grating is an optical fibre that widely use as sensor to sense strain, temperature and pressure. The advantages of FBG sensor are it will not affected by electromagnetic interference which can improve the accuracy of the result and also can be wearable sensor. In this paper, Optisystem software tools are used to analyse the strain performance of FBG sensor for monitoring knee joint movement in rehabilitation process. Single mode FBG with original wavelength of 1550nm are used to get the accurate result because of less attenuation and absorption factor. This project also analysed the wavelength shifted when strain experienced by FBG change. The accuracy of sensor and method of delivering the result are taken into the account. The interrogator are used to display the wavelength shifted by the FBG when there is change in strain experienced by FBG. All of the proposed designed are tested by using simulation software and the wavelength shifted in the simulation are compared to the theoretical value that has been calculated in this project. The development of this system expected to improve the rehabilitation process towards a healthy life.</span>

Collector Design of Tracking System Based on PLC

This article describes the Parabolic trough solar collector design of single-axis tracking system based on PLC, Siemens S7-300 as a controller, using a complex mathematical model, based on the special climate of Western Region, select the single-axis design process, greatly reduced cost, collectors need only be completed that automatically tracks the sun azimuth. Feedback device selection angle sensor, light intensity sensor and sun sensor, strain two conditions that cloudy and sunny, which greatly improves the efficiency of the collector, the better to achieve real-time tracking grasp the situation.

Procedure to Use PZT Sensors in Vibration and Load Measurements

In situ correlation procedure is developed for electromechanically coupled PZT sensors to output the structural responses in standard engineering format, namely, displacement, strain, acceleration, and so forth. In order to implement this idea, we have used the standard sensing devices such as laser displacement sensor, strain gauge, and accelerometer. Aluminum beams and composite plate are employed in the experiments as specimens. The experimental results have shown that the structural reactions at critical locations can be monitored by a dynamically correlated PZT patch sensor, besides measuring the intensity of load in terms of acceleration. Furthermore, the influence of damage on sensor correlation has been evaluated. It is seen that the presence of damage has significantly modified the interpreted engineering parameters from the PZT patch and if they are appropriately correlated with respect to healthy structure, then the occurrence of damage related information will be ascertained. The developed sensor correlation concept therefore may be useful in load monitoring, health monitoring, and structural control applications.