Ambran Hartono - Academia.edu (original) (raw)

Papers by Ambran Hartono

2021 9th International Conference on Cyber and IT Service Management (CITSM), Sep 22, 2021

The presentation of coffee drinks in shops is still done manually, where the presentation must es... more The presentation of coffee drinks in shops is still done manually, where the presentation must estimate the number of ingredients. However, some people did not like the results of the presentation. Therefore, to make it easier and help better service, this study designed an automatic tool to measure three types of liquids in the form of coffee, milk, and sugar to produce a cup of coffee in accordance with the desired dose so that people can enjoy coffee drinks according to their taste. In its implementation, this research uses an experimental method utilizing bluetooth android technology so that the automatic measuring instrument has a high enough accuracy so that people who want to enter the industrial world as well as an alternative process of serving coffee drinks can take advantage of it. The combustion process uses a mini water pump which can later be controlled via Android. Each pump has different characteristics seen from the flow rate. The characteristics of each pump become the set point for the dosing process. Where pump 1 has a characteristic value of 31.03 ml/s, pump 2 is 29.06 ml/s, pump 3 is 30.15 ml/s and the highest tool error value in the test is 5.33% with a tool accuracy value of 94.67%. Several factors affect the dosing process including flow rate, viscosity and hydrostatic pressure of the fluid. From the results of testing and experiments, it is shown that the research has been successfully carried out, this is indicated by the tool system that is made to work very well and has high accuracy.

PROCEEDINGS OF THE 1ST CONFERENCE ON QUANTUM SCIENCES AND TECHNOLOGY (CONQUEST 2022)

4TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND NATURAL SCIENCES (ICMNS 2012): Science for Health, Food and Sustainable Energy, 2014

ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carri... more ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of Roll Hot Press temperature on the size of the crystallite of PVDF films. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Furthermore, from the diffraction pattern is obtained, the calculation to determine the crystallite size of the sample by using the Scherrer equation. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130 °C up to 170 °C respectively increased from 7.2 nm up to 20.54 nm. These results show that increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases. This condition indicates that the specific volume or size of the crystals depends on the magnitude of the temperature as it has been studied by Nakagawa.

AIP Conference Proceedings, 2016

Polyvinylidene fluoride (PVDF) is a polymer with unique characteristics i.e. piezoelectric and fe... more Polyvinylidene fluoride (PVDF) is a polymer with unique characteristics i.e. piezoelectric and ferrroelectric properties. Piezoelectric propertiesof PVDF are determined by the fraction of β-phase structure. Several optimization methods have been developed to improve the piezoelectric properties of PVDF. One of our research efforts is to improve the piezoelectricity of PVDF by electric poling with high electric field 2G V/m. The application of high electric field performed on PVDF films with a thickness of 1 1m. Each sample was made with a deep coating method, with annealing temperature 70°C-110°C. Based on the XRD characterization, we have obtained value of β-fraction of samples after poling are: 56%, 61%, 77%, 81% and 83%, respectively. Therefore, high electric field poling has been able to improve the piezoelectric properties of PVDF films. The PVDF with good piezoelectric properties are potential can did a tes for piezoelectric sensors and actuators devices.

2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME), 2013

ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of sam... more ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of samples carried out for three different solvent concentrations, five of different temperature and three different heating times. This condition is carried out to see the effect of its on piezoelectric properties of PVDF films. The piezoelectric properties like as β fraction are discussion focus in this paper. Piezoelectric properties of PVDF can be improved by solvent concentrations various, temperature and heating time. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. The � fraction of PVDF films calculate from broadening pattern of X-Ray Diffraction. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased 31 %, 39 % and 44.5% for solvent concentrations of 10%, 15% and 20%, respectively. For the heating temperature from 70 oC up to 110oC have been obtained β fraction 37%, 38%, 44%, 50% and 58% respectively. Furthermore for the heating times 10 minute, 20 minute and 30 minute the β fraction are 34%, 48% and 60%. These results indicate that PVDF film results using deep coating method is good. These indication shown as from the β fraction obtained. From the results of sample characterization is known that a good percentage of solvent was 20%, heating temperature 110oC and long heating time is 30 minutes.

EKSAKTA: Berkala Ilmiah Bidang MIPA

Bio floc aquaculture techniques are present as a solution to increase the productivity of fish fa... more Bio floc aquaculture techniques are present as a solution to increase the productivity of fish farming. However, until now there are still problems, namely regarding the quality of the water from the pond. In this study, a monitoring tool was designed using an ESP32 microcontroller with the support of a BME280 sensor, RTD PT100 to measure water temperature and a turbidity sensor to measure floc volume. Furthermore, this sensor is planted on Wi-Fi to be able to connect to the internet network for IoT applications so that it can be monitored in real time. Likewise, the display results from the monitoring of the application system are directly read on the Google sheet display and in real time. From the test results of the system built, obtained the accuracy level of the BME280 sensor is 96.5%, PT100 RTD is 94.6% and for the turbidity sensor is 98%. Meanwhile the observed air temperature value can reach 34.36°C, the water temperature reaches 28.75°C, and the floc ratio reaches 30.15 mL....

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics, 2021

Research on the application of the acoustic impedance (AI) seismic inversion and multi-attribute ... more Research on the application of the acoustic impedance (AI) seismic inversion and multi-attribute method was conducted with the aim to characterize the reservoir in the Bonaparte Basin. The modeling which used in the acoustic impedance inversion seismic method is model-based. Meanwhile, the multi-attribute seismic method used log porosity that appliying the linear regression method and using the stepwise regression technique. Based on the result of the sensitivity analysis and analysis using the seismic inversion acoustic impedance method, the sandstone reservoir zone that has the prospect of hydrocarbons containing gas is located in the Northeast-Southwest part of the study area which in WCB-1, WCB-3 and WCB-4 well with the acoustic impedance values are in the range of 4,800 - 13,000 (m / s) * (g / cc), and the porosity values generated from the analysis using the multi-attribute seismic method are in the range of 5 - 16% in WCB-1 and WCB-4, 2 - 10% on WCB-3.

2022 10th International Conference on Cyber and IT Service Management (CITSM)

2022 10th International Conference on Cyber and IT Service Management (CITSM)

Jurnal ILMU DASAR, 2014

DC high voltage amplifier is one of the important components to support of PVDF thin films pollin... more DC high voltage amplifier is one of the important components to support of PVDF thin films polling equipment. Hardware polling is a very important tool in the characterization of PVDF thin films to increase piezoelectric properties. The existence of the problem will be difficult to obtain a high voltage DC sources of lead in the market encouraged us to design and create high-voltage DC source. In research that has been done I've been able to design and create high-voltage amplifier 30 KV DC as a producer of high electric field. To validate the performance of this high voltage DC amplifier has created further testing and measuring the output voltage. Testing is performed to determine the precision, accuracy and stability of the output voltage of the amplifier for more than 60 minutes. From the test results and output measurements performed show that the relative error of 4.5%. Tool output stability is good enough for a span of 30 minutes. This indicates that the design and manufa...

Pendahuluan Pengembangan instrumen secara terus-menerus baik dari sisi kualitas, harga maupun kea... more Pendahuluan Pengembangan instrumen secara terus-menerus baik dari sisi kualitas, harga maupun keandalannya menjadi keharusan dalam menghadapi kemajuan teknologi dan persaingan global [1]. Kebutuhan sensor dan sistem sensor tidak hanya pada bidang industri, tapi juga merambah pada bidang lain, seperti; bidang otomotif, teknologi pengolahan, bangunan, medis, komunikasi, teknologi informasi dan bidang lainya. Para peneliti di lembaga riset maupun perguruan tinggi berlombah-lombah untuk mengembangkan sensor dan sistem sensor baru dengan prinsip dan metoda yang berbeda-beda untuk memenuhi kebutuhan akan otomatisasi, keamanan dan kenyamanan. Saat ini teknologi sensor telah memasuki bidang aplikasi baru dan pasar yang semakin meluas seperti otomotif [2] dan rumah cerdas (smart home) [3]. Pada waktu yang bersamaan sensor atau sistem sensor juga dituntut untuk dapat mengatasi fenomena alam, seperti; peringatan dini gempa bumi, tsunami, pemanasan global dan gunung berapi. Besaran-besaran yang...

AIP Conference Proceedings, 2015

ABSTRACT Piezoelectric properties are one of the electrical properties that will arise in case of... more ABSTRACT Piezoelectric properties are one of the electrical properties that will arise in case of mechanical disturbances. One of polymer that can produce the greatest piezoelectric properties is poly vinylidene fluoride (PVDF). Piezoelectric properties of PVDF can be improved by mechanical treatment on the varying film thickness and the temperature. PVDF film has produced by roll hot press tool. Furthermore, PVDF films were characterized by XRD, IR and I-V meter. We have been obtained an increase piezoelectric properties of PVDF films that characterized by increasing ȕ fraction. We get ȕ fraction was 63.63%, 66.35% and 71.60% for temperatures of 140, 150 and 160 C, respectively at film thickness of 13 μm. In addition, We have gained ȕ fraction for the thickness of 15, 13 and 8 μm are 64.60%, 66.35% and 69.00%, respectively at temperature of 140 C. This is due to the increasing temperature and decreasing film thickness then more dipoles are oriented in PVDF films. These results indicate that mechanical treatment caused difference film thickness and temperature of PVDF film has a strong influence on the piezoelectric properties.

Advances in Materials Physics and Chemistry, 2013

Fabrication of PVDF films has been making using Hot Roll Press. Preparation of samples carried ou... more Fabrication of PVDF films has been making using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of temperature fabrication on electrical properties and crystallite size of PVDF films. The electrical properties like as surface resistivity are discussion focus in this paper. Surface resistivity properties of PVDF can be improved by mechanical treatment on the varying film thickness and the temperature. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Crystallite size of PVDF films calculate from broadening pattern of X-Ray Diffraction. Furthermore, from the diffraction pattern calculated β fraction and crystallite size, for calculation to determine the crystallite size of the sample by using the Scherrer equation. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased from 25.4% up to 44% for temperatures of 130˚C up to 170˚C, respectively. Resistivity value has been obtained at temperature 130˚C up to 170˚C, decreased from 1.23 × 10 4 Ωm up to 0.21 × 10 4 Ωm respectively. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130˚C up to 170˚C respectively are increased from 7.2 nm up to 20.54 nm. These results indicate that mechanical treatment caused increase β fraction and decrease surface resistivity. Increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases.

AIP Conference Proceedings, 2014

ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carri... more ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of Roll Hot Press temperature on the size of the crystallite of PVDF films. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Furthermore, from the diffraction pattern is obtained, the calculation to determine the crystallite size of the sample by using the Scherrer equation. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130 °C up to 170 °C respectively increased from 7.2 nm up to 20.54 nm. These results show that increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases. This condition indicates that the specific volume or size of the crystals depends on the magnitude of the temperature as it has been studied by Nakagawa.

2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME), 2013

ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of sam... more ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of samples carried out for three different solvent concentrations, five of different temperature and three different heating times. This condition is carried out to see the effect of its on piezoelectric properties of PVDF films. The piezoelectric properties like as β fraction are discussion focus in this paper. Piezoelectric properties of PVDF can be improved by solvent concentrations various, temperature and heating time. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. The � fraction of PVDF films calculate from broadening pattern of X-Ray Diffraction. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased 31 %, 39 % and 44.5% for solvent concentrations of 10%, 15% and 20%, respectively. For the heating temperature from 70 oC up to 110oC have been obtained β fraction 37%, 38%, 44%, 50% and 58% respectively. Furthermore for the heating times 10 minute, 20 minute and 30 minute the β fraction are 34%, 48% and 60%. These results indicate that PVDF film results using deep coating method is good. These indication shown as from the β fraction obtained. From the results of sample characterization is known that a good percentage of solvent was 20%, heating temperature 110oC and long heating time is 30 minutes.

IOSR Journal of Applied Physics, 2014

This paper presents the development and characterization a low cost, robust and reliable ground d... more This paper presents the development and characterization a low cost, robust and reliable ground displacement-based flat coil sensor for application of landslide detection. Flat coil element has been made from a thin epoxy and silver mixed with a number of coils 30, diameter of 3 cm and inductance 9.2 μH. The measurement static characteristic of sensor showed that the sensor output voltage increases with increasing distance between the seismic mass to the sensor and vice versa. Flat coil-based sensors have a working area between 0.6 to 10 mm with the absolute and the relative error of 0.035 mm, 0.81 %, respectively. The dynamic characteristic of sensor system is able to detect the ground shifting in the direction of the horizontal and vertical in the range (0-15) mm and (0-20) mm, respectively.

Abstrak: Fotokonduktivitas merupakan suatu fenomena umum yang biasa dimiliki pada bahan semikondu... more Abstrak: Fotokonduktivitas merupakan suatu fenomena umum yang biasa dimiliki pada bahan semikonduktor. Dimana bahan semikonduktor akan meningkat harga konduktivitasnya apabila dikenai cahaya dengan panjang gelombang tertentu. Fenomena fotokonduktivitas juga dapat diamati pada bahan polimer (isolator) yang mana mempunyai sifat model energi yang sama dengan bahan semikonduktor. Pengukuran fotokonduktivitas pada PVK bisa dilakukan dengan menggunakan metoda penyinaran kontinyu yang mana dalam metoda ini sampel PVK disinari secara terus menerus sambil mengamati perubahan tegangan yang teijadi. Harga konduktivitas bahan akan meningkat selain karena pengarug sinar juga karena pengaruh doping. Poll vinil karbazol adalah suatu polimer fotokonduktif yang banyak digunakan dalam elektrofotografi. Dalam keadaan konduksi PVK berfungsi sebagai donor elektron. Untuk menghasilkan konduktivitas yang lebih baik PVK biasanya dicampur dengan bahan yang dapat bert ndak sebagai akseptor elektron, dalam ha...

2021 9th International Conference on Cyber and IT Service Management (CITSM), Sep 22, 2021

The presentation of coffee drinks in shops is still done manually, where the presentation must es... more The presentation of coffee drinks in shops is still done manually, where the presentation must estimate the number of ingredients. However, some people did not like the results of the presentation. Therefore, to make it easier and help better service, this study designed an automatic tool to measure three types of liquids in the form of coffee, milk, and sugar to produce a cup of coffee in accordance with the desired dose so that people can enjoy coffee drinks according to their taste. In its implementation, this research uses an experimental method utilizing bluetooth android technology so that the automatic measuring instrument has a high enough accuracy so that people who want to enter the industrial world as well as an alternative process of serving coffee drinks can take advantage of it. The combustion process uses a mini water pump which can later be controlled via Android. Each pump has different characteristics seen from the flow rate. The characteristics of each pump become the set point for the dosing process. Where pump 1 has a characteristic value of 31.03 ml/s, pump 2 is 29.06 ml/s, pump 3 is 30.15 ml/s and the highest tool error value in the test is 5.33% with a tool accuracy value of 94.67%. Several factors affect the dosing process including flow rate, viscosity and hydrostatic pressure of the fluid. From the results of testing and experiments, it is shown that the research has been successfully carried out, this is indicated by the tool system that is made to work very well and has high accuracy.

PROCEEDINGS OF THE 1ST CONFERENCE ON QUANTUM SCIENCES AND TECHNOLOGY (CONQUEST 2022)

4TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND NATURAL SCIENCES (ICMNS 2012): Science for Health, Food and Sustainable Energy, 2014

ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carri... more ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of Roll Hot Press temperature on the size of the crystallite of PVDF films. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Furthermore, from the diffraction pattern is obtained, the calculation to determine the crystallite size of the sample by using the Scherrer equation. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130 °C up to 170 °C respectively increased from 7.2 nm up to 20.54 nm. These results show that increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases. This condition indicates that the specific volume or size of the crystals depends on the magnitude of the temperature as it has been studied by Nakagawa.

AIP Conference Proceedings, 2016

Polyvinylidene fluoride (PVDF) is a polymer with unique characteristics i.e. piezoelectric and fe... more Polyvinylidene fluoride (PVDF) is a polymer with unique characteristics i.e. piezoelectric and ferrroelectric properties. Piezoelectric propertiesof PVDF are determined by the fraction of β-phase structure. Several optimization methods have been developed to improve the piezoelectric properties of PVDF. One of our research efforts is to improve the piezoelectricity of PVDF by electric poling with high electric field 2G V/m. The application of high electric field performed on PVDF films with a thickness of 1 1m. Each sample was made with a deep coating method, with annealing temperature 70°C-110°C. Based on the XRD characterization, we have obtained value of β-fraction of samples after poling are: 56%, 61%, 77%, 81% and 83%, respectively. Therefore, high electric field poling has been able to improve the piezoelectric properties of PVDF films. The PVDF with good piezoelectric properties are potential can did a tes for piezoelectric sensors and actuators devices.

2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME), 2013

ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of sam... more ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of samples carried out for three different solvent concentrations, five of different temperature and three different heating times. This condition is carried out to see the effect of its on piezoelectric properties of PVDF films. The piezoelectric properties like as β fraction are discussion focus in this paper. Piezoelectric properties of PVDF can be improved by solvent concentrations various, temperature and heating time. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. The � fraction of PVDF films calculate from broadening pattern of X-Ray Diffraction. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased 31 %, 39 % and 44.5% for solvent concentrations of 10%, 15% and 20%, respectively. For the heating temperature from 70 oC up to 110oC have been obtained β fraction 37%, 38%, 44%, 50% and 58% respectively. Furthermore for the heating times 10 minute, 20 minute and 30 minute the β fraction are 34%, 48% and 60%. These results indicate that PVDF film results using deep coating method is good. These indication shown as from the β fraction obtained. From the results of sample characterization is known that a good percentage of solvent was 20%, heating temperature 110oC and long heating time is 30 minutes.

EKSAKTA: Berkala Ilmiah Bidang MIPA

Bio floc aquaculture techniques are present as a solution to increase the productivity of fish fa... more Bio floc aquaculture techniques are present as a solution to increase the productivity of fish farming. However, until now there are still problems, namely regarding the quality of the water from the pond. In this study, a monitoring tool was designed using an ESP32 microcontroller with the support of a BME280 sensor, RTD PT100 to measure water temperature and a turbidity sensor to measure floc volume. Furthermore, this sensor is planted on Wi-Fi to be able to connect to the internet network for IoT applications so that it can be monitored in real time. Likewise, the display results from the monitoring of the application system are directly read on the Google sheet display and in real time. From the test results of the system built, obtained the accuracy level of the BME280 sensor is 96.5%, PT100 RTD is 94.6% and for the turbidity sensor is 98%. Meanwhile the observed air temperature value can reach 34.36°C, the water temperature reaches 28.75°C, and the floc ratio reaches 30.15 mL....

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics, 2021

Research on the application of the acoustic impedance (AI) seismic inversion and multi-attribute ... more Research on the application of the acoustic impedance (AI) seismic inversion and multi-attribute method was conducted with the aim to characterize the reservoir in the Bonaparte Basin. The modeling which used in the acoustic impedance inversion seismic method is model-based. Meanwhile, the multi-attribute seismic method used log porosity that appliying the linear regression method and using the stepwise regression technique. Based on the result of the sensitivity analysis and analysis using the seismic inversion acoustic impedance method, the sandstone reservoir zone that has the prospect of hydrocarbons containing gas is located in the Northeast-Southwest part of the study area which in WCB-1, WCB-3 and WCB-4 well with the acoustic impedance values are in the range of 4,800 - 13,000 (m / s) * (g / cc), and the porosity values generated from the analysis using the multi-attribute seismic method are in the range of 5 - 16% in WCB-1 and WCB-4, 2 - 10% on WCB-3.

2022 10th International Conference on Cyber and IT Service Management (CITSM)

2022 10th International Conference on Cyber and IT Service Management (CITSM)

Jurnal ILMU DASAR, 2014

DC high voltage amplifier is one of the important components to support of PVDF thin films pollin... more DC high voltage amplifier is one of the important components to support of PVDF thin films polling equipment. Hardware polling is a very important tool in the characterization of PVDF thin films to increase piezoelectric properties. The existence of the problem will be difficult to obtain a high voltage DC sources of lead in the market encouraged us to design and create high-voltage DC source. In research that has been done I've been able to design and create high-voltage amplifier 30 KV DC as a producer of high electric field. To validate the performance of this high voltage DC amplifier has created further testing and measuring the output voltage. Testing is performed to determine the precision, accuracy and stability of the output voltage of the amplifier for more than 60 minutes. From the test results and output measurements performed show that the relative error of 4.5%. Tool output stability is good enough for a span of 30 minutes. This indicates that the design and manufa...

Pendahuluan Pengembangan instrumen secara terus-menerus baik dari sisi kualitas, harga maupun kea... more Pendahuluan Pengembangan instrumen secara terus-menerus baik dari sisi kualitas, harga maupun keandalannya menjadi keharusan dalam menghadapi kemajuan teknologi dan persaingan global [1]. Kebutuhan sensor dan sistem sensor tidak hanya pada bidang industri, tapi juga merambah pada bidang lain, seperti; bidang otomotif, teknologi pengolahan, bangunan, medis, komunikasi, teknologi informasi dan bidang lainya. Para peneliti di lembaga riset maupun perguruan tinggi berlombah-lombah untuk mengembangkan sensor dan sistem sensor baru dengan prinsip dan metoda yang berbeda-beda untuk memenuhi kebutuhan akan otomatisasi, keamanan dan kenyamanan. Saat ini teknologi sensor telah memasuki bidang aplikasi baru dan pasar yang semakin meluas seperti otomotif [2] dan rumah cerdas (smart home) [3]. Pada waktu yang bersamaan sensor atau sistem sensor juga dituntut untuk dapat mengatasi fenomena alam, seperti; peringatan dini gempa bumi, tsunami, pemanasan global dan gunung berapi. Besaran-besaran yang...

AIP Conference Proceedings, 2015

ABSTRACT Piezoelectric properties are one of the electrical properties that will arise in case of... more ABSTRACT Piezoelectric properties are one of the electrical properties that will arise in case of mechanical disturbances. One of polymer that can produce the greatest piezoelectric properties is poly vinylidene fluoride (PVDF). Piezoelectric properties of PVDF can be improved by mechanical treatment on the varying film thickness and the temperature. PVDF film has produced by roll hot press tool. Furthermore, PVDF films were characterized by XRD, IR and I-V meter. We have been obtained an increase piezoelectric properties of PVDF films that characterized by increasing ȕ fraction. We get ȕ fraction was 63.63%, 66.35% and 71.60% for temperatures of 140, 150 and 160 C, respectively at film thickness of 13 μm. In addition, We have gained ȕ fraction for the thickness of 15, 13 and 8 μm are 64.60%, 66.35% and 69.00%, respectively at temperature of 140 C. This is due to the increasing temperature and decreasing film thickness then more dipoles are oriented in PVDF films. These results indicate that mechanical treatment caused difference film thickness and temperature of PVDF film has a strong influence on the piezoelectric properties.

Advances in Materials Physics and Chemistry, 2013

Fabrication of PVDF films has been making using Hot Roll Press. Preparation of samples carried ou... more Fabrication of PVDF films has been making using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of temperature fabrication on electrical properties and crystallite size of PVDF films. The electrical properties like as surface resistivity are discussion focus in this paper. Surface resistivity properties of PVDF can be improved by mechanical treatment on the varying film thickness and the temperature. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Crystallite size of PVDF films calculate from broadening pattern of X-Ray Diffraction. Furthermore, from the diffraction pattern calculated β fraction and crystallite size, for calculation to determine the crystallite size of the sample by using the Scherrer equation. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased from 25.4% up to 44% for temperatures of 130˚C up to 170˚C, respectively. Resistivity value has been obtained at temperature 130˚C up to 170˚C, decreased from 1.23 × 10 4 Ωm up to 0.21 × 10 4 Ωm respectively. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130˚C up to 170˚C respectively are increased from 7.2 nm up to 20.54 nm. These results indicate that mechanical treatment caused increase β fraction and decrease surface resistivity. Increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases.

AIP Conference Proceedings, 2014

ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carri... more ABSTRACT Fabrication PVDF films have been made using Hot Roll Press. Preparation of samples carried out for nine different temperatures. This condition is carried out to see the effect of Roll Hot Press temperature on the size of the crystallite of PVDF films. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. Furthermore, from the diffraction pattern is obtained, the calculation to determine the crystallite size of the sample by using the Scherrer equation. From the experimental results and the calculation of crystallite sizes obtained for the samples with temperature 130 °C up to 170 °C respectively increased from 7.2 nm up to 20.54 nm. These results show that increasing temperatures will also increase the size of the crystallite of the sample. This happens because with the increasing temperature causes the higher the degree of crystallization of PVDF film sample is formed, so that the crystallite size also increases. This condition indicates that the specific volume or size of the crystals depends on the magnitude of the temperature as it has been studied by Nakagawa.

2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME), 2013

ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of sam... more ABSTRACT Fabrication of PVDF films has been making using Deep Coating Machine. Preparation of samples carried out for three different solvent concentrations, five of different temperature and three different heating times. This condition is carried out to see the effect of its on piezoelectric properties of PVDF films. The piezoelectric properties like as β fraction are discussion focus in this paper. Piezoelectric properties of PVDF can be improved by solvent concentrations various, temperature and heating time. To obtain the diffraction pattern of sample characterization is performed using X-Ray Diffraction. The � fraction of PVDF films calculate from broadening pattern of X-Ray Diffraction. Has been obtained an increase piezoelectric properties of PVDF films that characterized by increasing β fraction. Have been obtained β fraction increased 31 %, 39 % and 44.5% for solvent concentrations of 10%, 15% and 20%, respectively. For the heating temperature from 70 oC up to 110oC have been obtained β fraction 37%, 38%, 44%, 50% and 58% respectively. Furthermore for the heating times 10 minute, 20 minute and 30 minute the β fraction are 34%, 48% and 60%. These results indicate that PVDF film results using deep coating method is good. These indication shown as from the β fraction obtained. From the results of sample characterization is known that a good percentage of solvent was 20%, heating temperature 110oC and long heating time is 30 minutes.

IOSR Journal of Applied Physics, 2014

This paper presents the development and characterization a low cost, robust and reliable ground d... more This paper presents the development and characterization a low cost, robust and reliable ground displacement-based flat coil sensor for application of landslide detection. Flat coil element has been made from a thin epoxy and silver mixed with a number of coils 30, diameter of 3 cm and inductance 9.2 μH. The measurement static characteristic of sensor showed that the sensor output voltage increases with increasing distance between the seismic mass to the sensor and vice versa. Flat coil-based sensors have a working area between 0.6 to 10 mm with the absolute and the relative error of 0.035 mm, 0.81 %, respectively. The dynamic characteristic of sensor system is able to detect the ground shifting in the direction of the horizontal and vertical in the range (0-15) mm and (0-20) mm, respectively.

Abstrak: Fotokonduktivitas merupakan suatu fenomena umum yang biasa dimiliki pada bahan semikondu... more Abstrak: Fotokonduktivitas merupakan suatu fenomena umum yang biasa dimiliki pada bahan semikonduktor. Dimana bahan semikonduktor akan meningkat harga konduktivitasnya apabila dikenai cahaya dengan panjang gelombang tertentu. Fenomena fotokonduktivitas juga dapat diamati pada bahan polimer (isolator) yang mana mempunyai sifat model energi yang sama dengan bahan semikonduktor. Pengukuran fotokonduktivitas pada PVK bisa dilakukan dengan menggunakan metoda penyinaran kontinyu yang mana dalam metoda ini sampel PVK disinari secara terus menerus sambil mengamati perubahan tegangan yang teijadi. Harga konduktivitas bahan akan meningkat selain karena pengarug sinar juga karena pengaruh doping. Poll vinil karbazol adalah suatu polimer fotokonduktif yang banyak digunakan dalam elektrofotografi. Dalam keadaan konduksi PVK berfungsi sebagai donor elektron. Untuk menghasilkan konduktivitas yang lebih baik PVK biasanya dicampur dengan bahan yang dapat bert ndak sebagai akseptor elektron, dalam ha...