Anif Jamaluddin

Development of Wireless Battery Monitoring for electric vehicle

A Wireless Battery Monitoring System (WBMS) for electric vehicle has been developed for monitoring voltage, current and temperature of battery. This system consists of hardwares (sensors, a microcontroller, a bluetooth module, an Android smartphone) and software. It was designed on a low cost microcontroller ATMEGA 328 (Arduino UNO). Voltage, current and temperature data are transfered to microcontroller, then data of battery is transfered using bluetooth communication to display. In this research, data of battery monitoring are displayed on Personal Computer (PC) with LabVIEW programme and android smartphone. The monitoring system was able to show real-time data of voltage, current and temperature and display data on android smartphone and PC simultaneously.

Wireless water flow monitoring based on Android smartphone

In this study, a wireless data acquisition system was developed for wireless water flow monitoring (WWFM) in a closed channel pipeline system using android Smartphone. ATMEGA 328 single chip microcontroller (Arduino Uno Prototyping Platform) with a Bluetooth module, Near Field Communication — NFC tag, Smartphone with NFC reader, and G1-½ water flow sensor are applied in this design. The frequency input to the microcontroller was the pulse train which transferred from the G1-½ hall-effect water flow sensor. Then, the data from the microcontroller was transferred to an Android Smartphone using Bluetooth wireless serial communication. In addition, the NFC-tag is used as water flow sensor identification and location. Android Application was designed based on App Inventor for Android (AIA) which MIT platform. As the result, sensor ID based on NFC tag and flow rate of water using Android application on Smartphone was showed by the system. According to the experimental test, the flow monitoring ran well and displayed real-time of flow water in the closed channel pipeline system. The accuracy of wireless water flow measurement is 99.98%.

The influences of mole composition of strontium (x) on properties of barium strontium titanate (Ba1−xSrxTiO3) prepared by solid state reaction method

Barium Strontium Titanate (Ba1-xSrxTiO3) or BST was prepared by solid state reaction method. Raw materials are BaCO3, SrCO3, and TiO2. Those materials are mixed for 8 h, pressed, and sintered at temperature 1200°C for 2 h. Mole composition of Sr (x) was varied to study its influences on structural, morphological, and electrical properties of BST. Variation of (x) are x = 0; x = 0.1; and x = 0.5. XRD patterns showed a single phase of BST, which mean that mixture of raw materials was homogenous. Crystal structure was influenced by x. BaTiO3 and Ba0.9Ti0.1TiO3 have tetragonal crystal structure, while Ba0.5Sr0.5TiO3 is cubic. The diffraction angle shifted to right side (angle larger) as the increases of x. Crystalline size of BaTiO3, Ba0.9Sr0.1TiO3, and Ba0.5Sr0.5TiO3 are 38.13 nm; 38.62 nm; and 37.13 nm, respectively. SEM images showed that there are still of pores which were influenced by x. Ba0.9Sr0.1TiO3 has densest surface (pores are few and small in size). Sawyer Tower circuit showed that BaTiO3 and Ba0...

Study of imbalanced internal resistance on drop voltage of LiFePO4 battery system connected in parallel

The purpose of this research focuses on the effect of imbalanced internal resistance for the drop voltage of LiFePO4 18650 battery system connected in parallel. The battery pack has been assembled consist of two cell battery LiFePO4 18650 that has difference combination of internal resistance. Battery pack was tested with 1/C constant current charging, 3,65V per group sel, 3,65V constant voltage charging, 5 minutes of rest time between charge and discharge process, 1/2C Constant current discharge until 2,2V, 26 cycle of measurement test, and 4320 minutes rest time after the last charge cycle. We can conclude that the difference combination of internal resistance on the battery pack seriously influence the drop voltage of a battery. Theoretical and experimental result show that the imbalance of internal resistance during cycling are mainly responsible for the drop voltage of LiFePO4 parallel batteries. It is thus a good way to avoid drop voltage fade of parallel battery system by suppressing variations of internal resistance.

A periodic review integrated inventory model with controllable safety stock and setup cost under service level constraint and distribution-free demand

In this study, we consider a stochastic integrated manufacturer-retailer inventory model with service level constraint. The model analyzed in this article considers the situation in which the vendor and the buyer establish a long-term contract and strategic partnership to jointly determine the best strategy. The lead time and setup cost are assumed can be controlled by an additional crashing cost and an investment, respectively. It is assumed that shortages are allowed and partially backlogged on the buyers side, and that the protection interval (i.e., review period plus lead time) demand distribution is unknown but has given finite first and second moments. The objective is to apply the minmax distribution free approach to simultaneously optimize the review period, the lead time, the setup cost, the safety factor, and the number of deliveries in order to minimize the joint total expected annual cost. The service level constraint guarantees that the service level requirement can be satisfied at the worst case. By constructing Lagrange function, the analysis regarding the solution procedure is conducted, and a solution algorithm is then developed. Moreover, a numerical example and sensitivity analysis are given to illustrate the proposed model and to provide some observations and managerial implications.

Effect of codoping cobalt and aluminum on enhancing the piezoelectricity properties of fiber-based zinc oxide

This study reports the effect of co-doping cobalt and aluminum on the properties of ZnO-fiber piezoelectric materials. Synthesizing the ZnO-fiber piezoelectric material consisted of four steps: (1) making precursor solutions by doping aluminum and cobalt, (2) creating green fibers with an electrospinning machine, (3) sintering the fibers, and (4) testing the piezoelectricity properties. The precursor materials used were polyvinyl acetate (PVA), zinc-acetate (ZnAc), AlCl3, and CoAc. The ZnO fibers were produced in an electrospinning machine with a distance between needle tip and collector of 8 cm and a flow rate of precursor solutions at 4 µL/min. The sintering was conducted at temperatures of 400, 450, 500, 550, and 600°C for 4 hours. Piezotest was used to measure the piezoelectricity properties of ZnO or d33. The results show that the maximum value of d33 was obtained in co-doping cobalt:aluminum at a ratio of 75:25 at the sintering temperature of 500°C, which amounted to −4.1 pC/N. The ZnO-fiber-based n...

Simple fabricating PCB-based inter digital capacitor for glucose biosensor

This paper presents the simple fabrication of interdigital capacitor (IDC) using print circuit board (PCB) for glucose biosensor. PCB type FR04 laminated with Cu as electrode was used as sensor base. The IDC pattern of sensor was designed by computer aided design program and printed with a laser printer on plastic polymers. Then, the IDC pattern was transferred into PCB by a laminating machine. The etching process of PCB was done by immersing in ferric chloride liquid to form Cu pattern. There were five patterns of sensors including 5, 10, 15, 20 and 25 patterns. The capacitance value of PCB was measured with RCL meter when IDC biosensor was put in air, aquades, and glucose liquid with various moles of glucose (0.02, 0.04, 0.06, 0.08, 0.1M). In air medium, the increase of pattern number of IDC sensor (from 5 to 25) caused the sensor capacitance rose from 22 pf to 46 pf. In addition, the capacitance of sensor was dramatically increased until 0.36 µf while IDC sensor with 25 patterns was put in aquades medium. In liquid glucose medium, the capacitance of IDC biosensor with 25 patterns increased until 0.58 µf on 0.1 M glucose liquid.This paper presents the simple fabrication of interdigital capacitor (IDC) using print circuit board (PCB) for glucose biosensor. PCB type FR04 laminated with Cu as electrode was used as sensor base. The IDC pattern of sensor was designed by computer aided design program and printed with a laser printer on plastic polymers. Then, the IDC pattern was transferred into PCB by a laminating machine. The etching process of PCB was done by immersing in ferric chloride liquid to form Cu pattern. There were five patterns of sensors including 5, 10, 15, 20 and 25 patterns. The capacitance value of PCB was measured with RCL meter when IDC biosensor was put in air, aquades, and glucose liquid with various moles of glucose (0.02, 0.04, 0.06, 0.08, 0.1M). In air medium, the increase of pattern number of IDC sensor (from 5 to 25) caused the sensor capacitance rose from 22 pf to 46 pf. In addition, the capacitance of sensor was dramatically increased until 0.36 µf while IDC sensor with 25 patterns was put in aquades medi...

Effect of internal resistance mismatch on performance of battery pack LiFePO 4

This paper describes a mismatch of internal resistance battery LiFePO4 when assembling into battery pack. Internal resistance battery is a number that states the value of resistance that exist within the battery component, it will affect the State of Health, State of Charge, life time, until the heat generated by the battery. The tools used in this experiment include the internal resistance tester EQ-MSK-BK300, battery analyzer BST8-3, and the results are observed in real time on software TC5.3. The experimental results showed that there are differences produced by some of the battery pack that has a different internal resistance.

Fabrication and integration of PDMS-glass based microfluidic with optical absorbance measurement device for coliform bacteria detection

The detection of coliform bacteria which contain the disease-causing microorganism is a useful indication for water contamination. Currently, the emerging of technology in molecular biology research and industry is in demand for portable and miniaturized system. This paper demonstrates the development and integration of microfluidic and optical absorbance measurement device for portable coliform bacteria detection. The microfluidic device was fabricated with glass and polydimethylsiloxane (PDMS) material using photolithography, replica molding (soft lithography), and oxygen plasma bonding techniques. Then, the optical absorbance measurement device for coliform bacteria detection was developed using 470 nm blue light emitting diode (LED), photo detector, ARDUINO microcontroller, liquid crystal display (LCD), and mechanical elements. The coliform bacteria suspension sample was inserted into the microfluidic device and the presence of coliform bacteria was analyzed using the developed optical absorbance measurement device. The absorbance measurement from the prototype and colony number of the coliform bacteria samples were collected and analyzed. The final analysis had indicated that the developed prototype was able to detect the coliform bacteria in suspension at the lowest detection of 17,200 CFU/ml.

Pengaruh Doping Zirkonium (Zr) pada Konstanta Dielektrik dan Struktur Kristal BaZrxTi1−xO3

Barium zirkonium titanat (BaZrxTi1−xO3) dengan variasi mol dopan zirkonium (x) sebanyak 0,01 mol; 0,02 mol; dan 0,03 mol telah disintesis menggunakan metode reaksi fasa padat. Sampel disintering pada temperatur 1100C dengan waktu tahan selama 2 jam. Sampel dikarakterisasi menggunakan instrumen XRD dan RLC meter untuk mengetahui pengaruh doping terhadap struktur kristal dan konstanta dielektrik BaZrxTi1−xO3. Hasil analisis XRD menunjukkan bahwa BaZrxTi1−xO3 memiliki struktur kristal tetragonal dengan a = b 6= c. Ukuran kristal BaZrxTi1−xO3 pada x = 0,01; x = 0,02; dan x = 0,03 masing-masing adalah 34 nm, 33 nm, dan 38 nm. Pengukuran RCL meter diperoleh konstanta dielektrik sebesar 331, 522, dan 641.