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All Journal ENGINEERING SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer Elektrika Malcom: Indonesian Journal of Machine Learning and Computer Science Electrician : Jurnal Rekayasa dan Teknologi Elektro Tematik
Sri Heranurweni
Program Studi Teknik Elektro, Fakultas Teknik, Universitas Semarang
Aerospace Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Social Sciences Other

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Journal : Elektrika

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SISTEM MONITORING PENGENDALI DAN PENGHITUNG WAKTU PADA DRAG RACE BERBASIS MIKROKONTROLER AT MEGA 8535 Bangun Marhendra, Vendi; Heranurweni, Sri
eLEKTRIKA Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1164

Abstract

In a drag race, which is often held by race organizers. The process of determining the jump start and determining who crosses the first finish line still relies on human monitoring. Manually recording (stopwatch) is not enough because there are many inhibiting factors, including: operator, start theft by drivers, recording results, damage to the stopwatch and others. The drag race is often held during the day. The hot weather will cause someone to get tired quickly, in this case it is aimed at the person who is the operator who monitors the theft of the start and the operator at the finish line because the person is in the middle of a very hot track. Based on the reasons mentioned above, it is necessary to have a controller and timer system on the ATMega8535 microcontrollerbased drag race. Making this tool will facilitate the work of humans in obtaining information in the racing arena that does not allow humans to do it manually, so that accurate data is obtained.Keywords: Atmega 8535 microcontroller, jump start, stopwatch
RANCANG BANGUN SMART HOME AUTOMATIC CONTROL dengan KOMUNIKASI MELALUI BLUETOOTH HC-05 BERBASIS MIKROKONTROLER ARDUINO dan ANDROID Erwinnanto, Yohan; Kurniawan Nugroho, Andi; Heranurweni, Sri
eLEKTRIKA Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1161

Abstract

Design of Smart Home Automatic Control with Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android, will provide all the comfort, safety, security and energy savings, which takes place automatically and programmed via microcontroller, the house or building. Design of Smart Home Automatic with Control Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android is intended for automatic control processes. The system consists of seven sensors, keypad password for security doors, HC-05 Bluetooth GSM alarm application and device control applications aktuaktor, and aktuaktor buzzer, dc motors, lights, fans and fan dc exhausting. Among these sensors is a PIR sensor to detect theft, sensor MQ6 to detect leakage of LPG gas and smoke from fires, sensor HC-SR04 ultrasonic for automatic garage doors, fire sensors to detect a fire, the sensor LM35 to detect the temperature of the room, when the room temperature is hot the fan will be on automatically, when the cold room temperature will shut off the fan and LDR sensor to detect the intensity of light during the day which turn the lights off automatically and vice versa, thus saving energy. Homeowners can also control lights and monitoring sensors with android phones that are connected with communication via Bluetooth HC-05 microcontroller arduino, and can receive GSM alarm application sensors such as calling and sms. Test results are used UART communication data transmission between the microcontroller serial monitor monitor has an error of 0 % . HC - 05 Bluetooth can accept orders at the farthest distance of 11 meters . The fire sensor can work well when the fire was 110 cm . Sensor HC - SR04 is already working with an error rate of 0.3 %, so the accuracy of this tool by 100 % - 0.3 % = 99.7 % .Keywords : Security Door , Bluetooth HC - 05 , Microcontroller Arduino and Android , Application Control and Application GSM alarm.
RANCANG BANGUN SMART HOME AUTOMATIC CONTROL dengan KOMUNIKASI MELALUI BLUETOOTH HC-05 BERBASIS MIKROKONTROLER ARDUINO dan ANDROID Erwinnanto, Yohan; Kurniawan N, Andi; Heranurweni, Sri
Elektrika Vol. 9 No. 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1092

Abstract

Design of Smart Home Automatic Control with Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android, will provide all the comfort, safety, security and energy savings, which takes place automatically and programmed via microcontroller, the house or building. Design of Smart Home Automatic with Control Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android is intended for automatic control processes.The system consists of seven sensors, keypad password for security doors, HC-05 Bluetooth GSM alarm application and device control applications aktuaktor, and aktuaktor buzzer, dc motors, lights, fans and fan dc exhausting. Among these sensors is a PIR sensor to detect theft, sensor MQ6 to detect leakage of LPG gas and smoke from fires, sensor HC-SR04 ultrasonic for automatic garage doors, fire sensors to detect a fire, the sensor LM35 to detect the temperature of the room, when the room temperature is hot the fan will be on automatically, when the cold room temperature will shut off the fan and LDR sensor to detect the intensity of light during the day which turn the lights off automatically and vice versa, thus saving energy. Homeowners can also control lights and monitoring sensors with android phones that are connected with communication via Bluetooth HC-05 microcontroller arduino, and can receive GSM alarm application sensors such as calling and sms.Test results are used UART communication data transmission between the microcontroller serial monitor monitor has an error of 0 % . HC - 05 Bluetooth can accept orders at the farthest distance of 11 meters . The fire sensor can work well when the fire was 1-10 cm . Sensor HC - SR04 is already working with an error rate of 0.3 %, so the accuracy of this tool by 100 % - 0.3 % = 99.7 % .Keywords : Security Door , Bluetooth HC - 05 , Microcontroller Arduino and Android , Application Control and Application GSM alarm.
SISTEM MONITORING PENGENDALI DAN PENGHITUNG WAKTU PADA DRAG RACE BERBASIS MIKROKONTROLER AT MEGA 8535 Bangun Marhendra, Vendi; Heranurweni, Sri
Elektrika Vol. 9 No. 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1095

Abstract

 In a drag race, which is often held by race organizers. The process of determining the jump start and determining who crosses the first finish line still relies on human monitoring. Manually recording (stopwatch) is not enough because there are many inhibiting factors, including: operator, start theft by drivers, recording results, damage to the stopwatch and others. The drag race is often held during the day. The hot weather will cause someone to get tired quickly, in this case it is aimed at the person who is the operator who monitors the theft of the start and the operator at the finish line because the person is in the middle of a very hot track. Based on the reasons mentioned above, it is necessary to have a controller and timer system on the ATMega8535 microcontrollerbased drag race. Making this tool will facilitate the work of humans in obtaining information in the racing arena that does not allow humans to do it manually, so that accurate data is obtained.Keywords: Atmega 8535 microcontroller, jump start, stopwatch  
RANCANG BANGUN ROBOT PEMADAM API BERODA DENGAN NAVIGASI SENSOR KOMPAS BERBASIS ATMEGA 128 Nurul hilal, Yusuf; Heranurweni, Sri; Kurniawan N, Andi
Elektrika Vol. 9 No. 1 (2017): April 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.142 KB) | DOI: 10.26623/elektrika.v9i1.1108

Abstract

CMPS03 an electronic compass sensor navigation sensor that helps in determining the direction toward the robot and in tracing the wall or room that works according to the principle of the compass in general. CMPS03 electronic compass sensor has two sensors that will detect ferrous magnetic Earth's magnetic field and also has a range of angles 360Ëš, the resulting data is then sent to the microcontroller Keywords: Compass Sensor, Robot, and Microcontroller.
SIMULASI PENGATURAN KECEPATAN MOTOR INDUKSI 3 PHASA DENGAN DIRECT TORQUE CONTROL MENGGUNAKAN MATLAB Khasanah, Ulfatun; Supari, Supari; Heranurweni, Sri
Elektrika Vol. 9 No. 1 (2017): April 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (864.46 KB) | DOI: 10.26623/elektrika.v9i1.1109

Abstract

Induction motors are widely used in the industrial world because they have many advantages, including construction that is very simple and strong, cheap, has high efficiency, quite good power factor, and maintenance is easier. Besides the advantages of induction motors also have weaknesses, one of the disadvantages of an induction motor is not being able to maintain its speed constantly if there is a change in load. If there is a change in load, the speed of the induction motor will decrease. One method of regulating the speed of an induction motor developed in addition to vector control is the Direct Torque Control (DTC) method. The DTC control technique allows direct and separate flux and torque settings and can be done without using a speed sensor. The estimated rotor rotation, torque and flux is carried out by the DTC which is inputted with stator voltage and current. To achieve the desired flux and torque estimation is used as feedback on the control system. In this final assignment, the speed regulation of the induction motor will be simulated using the DTC method using Matlab. The results obtained through the simulation show the length of time to reach the reference speed for speeds of 500rpm and 1000 rpm is around 0.5 seconds. Keywords : Induction motor, Direct Torque Control, Matlab.
ANALISIS TINGKAT KEBISINGAN TERHADAP AKTIVITAS BELAJAR MENGAJAR DI FAKULTAS TEKNIK UNIVERSITAS SEMARANG Ahmad, Fahrudin; Dwi Handayani, Iryan; Heranurweni, Sri
Elektrika Vol. 10 No. 1 (2018): April 2018
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (837.049 KB) | DOI: 10.26623/elektrika.v10i1.1116

Abstract

Optimal teaching or learning activities require a conducive and quiet environment because the high concentration required on its process. Campus area requires a quiet and silent environment. It is difficult for the urban areas to get a quiet campus environment. The study tries to reveal the evaluation on how the noise factors that occur during teaching and learning process. The study was conducted at Semarang University. The research method used is descriptive analytic method. Research shows that the building of engineering faculty (the A building) at Semarang University shows the proper noise level in line with the standard (School Acoustic Quality Standards). Besides, Semarang University must establish rules and policies to control the noise levels, to intensify the comfort of the lecture process. Based on the research results, the noise level on the Engineering faculty building of Semarang University has not been in line with the predetermined standard, which is more than (55 dB).Keywords: noise, lecture activities, acoustic quality standards of school buildings
Analisa Citra Medis Pada Pasien Stroke dengan Metoda Peregangan Kontras Berbasis ImageJ Destyningtias, Budiani; Kurniawan N, Andi; Heranurweni, Sri
Elektrika Vol. 10 No. 1 (2018): April 2018
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (999.936 KB) | DOI: 10.26623/elektrika.v10i1.1130

Abstract

Penelitian ini bertujuan mengembangankan teknologi pengolahan citra medis terutama citra medis CT Scan penderita stroke. Dokter dalam menentukan tingkat keparahan pasien stroke biasanya menggunakan citra medis CT scan dan mengalami kesulitan dalam menginterpretasikan luasan cakupan perdarahan.Solusi yang digunakan dengan peregangan kontras yang akan membedakan jaringan sel, tulang tengkorak dan jenis perdarahan. Penelitian ini menggunakan peregangan kontras dari hasil citra CT Scan yang dihasilkan dengan terlebih dahulu mengubah Citra DICOM menjadi citra JPEG dengan menggunakan bantuan program ImageJ. Hasil penelitian menunjukkan bahwa metode histogram ekualisasi dan analisis tekstur statistik dapat digunakan untuk membedakan yang normal MRI dan abnormal MRI yang terdeteksi stroke. Kata Kata Kunci : Stroke, MRI , Dicom, JPEG, ImageJ, Peregangan Kontras
KLASIFIKASI POLA IMAGE PADA PASIEN TUMOR OTAK BERBASIS JARINGAN SYARAF TIRUAN ( STUDI KASUS PENANGANAN KURATIF PASIEN TUMOR OTAK ) Heranurweni, Sri; Destyningtias, Budiani; Kurniawan Nugroho, Andi
Elektrika Vol. 10 No. 2 (2018): Oktober 2018
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (733.053 KB) | DOI: 10.26623/elektrika.v10i2.1169

Abstract

 Nowadays medical science has developed rapidly, diagnostic and treatment techniques have provided life expectancy for patients. One way of examining brain tumor sufferers is radiological examination that needs to be done, including MRI with contrast. MRI brain images are useful for seeing tumors in the initial steps of diagnosis and are very good for classification, erosions / destruction lesions of the skull. Smoothing image processing, segmentation with otsu method and feature extraction are carried out to facilitate the training and testing process. This study, will apply texture analysis with the parameters contrast, correlation, energy, homogenity to distinguish the texture of brain tumor images and normal so as to produce a standard gold value based on existing texture characteristics. Training and testing of texture features using backpropagation method of artificial neural networks with variations in learning rate values so that it is expected to obtain a classification of the image conditions of patients with brain tumors. The data used are 29 brain images that produce classification accuracy of 96.55%.Keywords :   MRI images, brain tumors, textur, backprogation  
SIMULASI PH AIR UNTUK AIR BOILER DAN AIR CHILLER PADA MESIN PRODUKSI REFRIGERATOR DENGAN MENGGUNAKAN LOGIKA FUZZY Irawan, Andhika; Heranurweni, Sri; Nurhayati, Titik
Elektrika Vol. 11 No. 1 (2019): April 2019
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.48 KB) | DOI: 10.26623/elektrika.v11i1.1541

Abstract

The need for water is very important for the production process, the water quality must also be considered the pH value so that the water is suitable for use in boilers or chillers. Seeing from these needs a simulation was made on matlab R2017a using a fuzzy toolbox that can find out the water quality with fuzzy mamdani method. This fuzzy logic simulation can determine the standard value of boiler water pH (10.5-11.5) and the standard pH value of chiller water (6-8) in the production machine. The methods in fuzzy logic used are mamdani and centroid methods as deffuzification with R2017a matlab simulation tool. The fuzzy inference system used is the mamdani method. This study made a simulation of mamdani method that can determine the quality of the PH water produced by using fuzzy logic. Chiller water pH can be used if iron ion values (0-2 ppm), silica ions (50-150 ppm), Total Dissolved Solid (TDS) (500-1000 ppm), total Hardness (100-200 ppm), M-alkalinity (500-750 ppm) from the standard value, the pH of the chiller water can be proven to reach a water pH value of 6-8. Boiler water pH can be used if iron ion values (0-2 ppm), silica ions (100-150 ppm), Total Dissolved Solid (TDS) (2000-3500 ppm), total Hardness (0-3 ppm), M-alkalinity (700-800 ppm) from the standard value, the pH of boiler water can be proven to reach a water pH value of 10.5-11.5.Keywords: fuzzy logic, Mamdani method, pH of boiler water
Co-Authors Agus Supriyanto Ananta Wahyu P Andi Kurniawan Nugroho Ari Endang Jayanti, Ari Endang Ari Endang Jayati Ari Endang Jayati Azizah, Devi Nur Bangun Marhendra, Vendi Bangun Marhendra, Vendi Budiani Destyningtias Cahyo, Mukti Dwi Dwi Handayani, Iryan Erwinnanto, Yohan Erwinnanto, Yohan Eryawan, Bagus Fahrudin Ahmad Fitriyan, Moh Tamam Edy Harmini, Harmini Idris, La Ode Muhamad Irawan, Andhika Juliartadi, Hendra Ady Khasanah, Ulfatun Kurniawan N, Andi Kurniawan Nugroho, Andi Kurniawan Nugroho, Andi Minarti, Wahyu Noor Arifin Nurul hilal, Yusuf Sipan, M. Supari Supari, Supari Titik Nurhayati