EXPLOSIVE DETECTOR DESIGN TO KNOW THE EXISTENCE OF EXPLOSIVE MATERIALS BY COMPARING THE LARGE VALUE OF MEDNET MAGNET USING ARDUINO IN JUANDA

The design of this explosive detector is an alternative low-cost explosive detector device that can detect the presence of explosives by comparing the value of the magnetic field so that an object will be known to be an explosive or not. This tool can provide additional assistance in the Juanda airport area which still rarely uses conventional explosive detector equipment because the price is still expensive. This design uses a magnetometer sensor that can calculate the magnitude of the magnetic field in the explosives and will send analog inputs in the form of voltage values to the Arduino displayed with LCD media and sound from the buzzer so that the category of explosives can be detected.


I. INTRODUCTION
Based on the International Air Transport Association (IATA) in the Dangerous Goods Regulation and Annex 18 concerning The Safe Transport of Dangerous Goods by Air, it is explained that there are some goods or materials which are not allowed to be transported by airplane. Goods or materials that allow danger to the health, safety or property of passengers when transported by airplane. Therefore, it is necessary to check passenger luggage before being put on the plane, one of which is using the Explosive Detector [1], [2], [3].
Explosive Detector is a device designed to detect the presence of explosives in aircraft passengers and goods to be transported on aircraft [4]. Explosive detector is able to detect the presence of vapor and explosive particles. When explosives are detected, the equipment will automatically give an alarm in the form of sound, graphics and text [5]. However, this equipment is still rarely used in Indonesian airports because the price is still expensive.
Based on the above problems, then an idea arises to make an explosive detector design at a more affordable cost by using a magnetometer sensor to compare the magnitude of the magnetic field in the explosives [6], [7]. This design is connected with a power supply of 5 Vdc that comes from a 220 Vac PLN voltage that has been changed by the power supply circuit. magnetometer as a sensor calculating the magnetic field on explosives sends analog inputs in the form of voltage values to Arduino [8] [9]. While the Arduino output is connected to the LCD and buzzer to display the magnitude of the magnetic field, the category of explosives that are detected and the output in the form of sound.

II. RESEARCH METHODS
The trick is to connect Arduino to the power supply that comes from a 220 Vac PLN voltage which will be converted to 5 Vdc by the power supply failure. The magnetometer as a sensor calculating the magnetic field on an explosive sends analog input in the form of a voltage value to the Arduino. Arduino will compare the magnitude of the magnetic field received from the magnetometer sensor with a program that has been made to determine the classification of explosives. Output of Arduino connected with the LCD and buzzer to show the results of a large magnetic field and category of explosives were detected and sound output.

III. RESULTS AND DISCUSSION
In this section, the test data was collected at the time of testing on the explosive detector using

Power Supply Testing
Supply voltage obtained from a voltage of 220 Volt AC obtained from source PLN. Power supply circuit can change the 220 Vac Input voltage to Output 5 Vdc. Output 5 Vdc will be an Arduino voltage input of 5 Vdc. To find out the magnitude of the power supply voltage in accordance with the provisions it is necessary to test it before it is used on research equipment. Tests carried out using a multimeter.

LCD testing (Liquid Crystal Display)
LCD testing is done to find out the work of the LCD in displayingcharacters or data in accordance with the planned program. The LCD is mounted on the PORT DIG 2, 3, 9, 10, 11, 12 on the I2C 1602 serial module which is later connected to arduino.Testing is done using a multimeter by connecting the red multimeter probe with the LCD 2 pin or Vdd pin and the black probe with pin 1 or ground pin. If the voltage value indicated by AVO is 5 volts, the device is in normal condition.

Testing I2C 1602 Serial module
This test is I2C 1602 Serial Module to find out the performance of the module itself instead of serial data from the LCD into digital data that will be connected with Arduino. The voltage on the I2C 1602 Serial Module can be measured on vcc and ground using a multimeter. Measure the voltage generated by connecting the red multimeter probe with the vcc module and the black probe with ground. If it shows a 5-volt voltage, the module is in normal condition.

Buzzer Testing
Buzzer testing is conducted to determine the performance of Buzzer in producing sound output in accordance with the planned program. In designing this tool, Buzzer is installed on PORT DIG 5. Testing is done by inserting a microcontroller program with the Buzzer measurement program using the Arduino application first, then connect Buzzer with Arduino via PORT DIG 5 on the design of the tool in accordance with the program and connect the power supply. Here are the results of table-shaped tests, namely:

Testing the value of ADC (Analog to Digital Converter)
ADC value testing is carried out in order to find out the voltage conversion results using the ADC (Analog to Digital Converter) program on the Arduino application. In designing this tool, using ADC with a resolution of 10 bits.
In the ADC measurement in the design of this tool the resolution used is 10 bits, so the quantity level is as follows: Quantity Level = 2 n , where n = Resolution (bit) N = 10-bit, Quantity Level = 2 10 =1024 To convert the ADC (Analog to Digital) form to voltage using the following formula: In this ADC measurement using a 5-volt reference V, the calculation results from the LCD display (Arduino program) will be compared with the measurement results using an Avometer/multimeter.

Testing Magnetometer UGN3503
Sensor testing was conducted to determine the ability of the UGN3503 magnetometer sensor to detect the magnitude of the magnetic field on the explosive test material used in the Explosive Detector. In the process of measuring sensors using test materials in the form of firecrackers that have different magnetic fields so that explosives will be categorized as A, B or C. The output from the detection process by the sensor in the form of ADC values will be compared based on the database that has been programmed. With the existing ADC value classification will be based on the amount of ADC value. Then the ADC value will be sampled to determine the category of explosives, where the magnitude program of the magnetic field category Low 0 -0.53 Gauss, Medium 0.54 -0.80 Gauss and High is more than 0.81 Gauss.

Data Analysis
From the results of the 6 tests above, the writer can do the analysis as follows:

Power Supply Analysis
Testing on the power supply circuit aims to measure the amount of voltage needed by Arduino as a place of data processing. The required voltage is 5 Vdc. After measuring the power supply circuit, the output voltage for power supply ranges from 4.88 Vdc to 5.04 Vdc.

LCD Analysis (Liquid Cristal Display)
On the 16x2 LCD datasheet the Input Voltage value on pin 2 or VDD pin is 5 Vdc while the measurement on the LCD uses AVO meter by connecting the red AVO meter probe to pin 2 or LCD VDD pin and the black probe with pin 1 or GND pin shows a large voltage 4.9 Vdc. This shows that the value on the datasheet with the measurement value on the AVO meter is approaching.

Analysis of I2C 1602 Serial module
In the I2C 1602 Serial Module Operating Voltage datasheet of 5Vdc while the measurement on the LCD uses an AVO meter by connecting the red AVO meter probe to the VCC pin and the black pin GND probe shows a voltage of 4.9 Vdc. This shows that the value on the datasheet with the measurement value on the AVO meter is approaching.

Buzzer Analysis
Based on the results of the Buzzer test, when Input is low, the Buzzer does not sound while when Input is High, the Buzzer will sound. This means Buzzer works normally.

Analysis of ADC (Analog to Digital Converter) values
Comparison between the results of the voltage calculation approaches the measurement results using a multimeter/Avometer as well as reading the ADC value and LCD display. This shows that the ADC program found in Arduino works in accordance with the planned program.

Analysis of UGN3503 Magnetometer Sensor
The data in table 4.6 is the measurement data on the test material which in the table shows the magnitude of the magnetic field of each test material and its category. Where material A 0.53 Gauss is the Low category, material B 0.80 Gauss is the Medium category and C material 1.06 Gauss is the High category. This shows that the UGN3503 Magnetometer Sensor operates well because it is able to censor large magnetic fields of a ferromagnetic material or magnetic material with a small difference and is able to be transformed into a voltage with a small difference so that it can be said the UGN3503 Magnetometer sensor has good sensitivity. For the maximum distance measurement from the UGN3503 magnetometer sensor is 10 mm.

IV. CONCLUSION
Based on the results of planning design explosive detector to know the existence of explosives by comparing large magnetic field values using Arduino in Juanda airport area: 1. Explosive Detector design can detect the presence of low explosive types of explosives (firecrackers) and can distinguish types of explosive test materials A (Low 0.1-0.53 gauss), B (Medium 0.54-0.80 gauss) and C (High 0.81> gauss).
2. UGN3503 magnetometer sensor can be used as a detection of Dangerous Goods in the form of explosive heating 3. The detection system of alatin uses a UGN3503 magnetometer sensor wherein to detect the material, it needs a large amount of magnetism and magnetism from the edible material.

ACKNOWLEDGMENT
Acknowledgments and awards need to be conveyed to PGRI Adi Buana University Surabaya Faculty of Industrial Technology especially the Electrical Engineering study program, which has provided laboratory facilities for the completion of writing this article.