Our multifunctional measurement system\u2019s name came\nfrom the multi-faced ancient Roman god Janus and Janus Pannonius, bishop of\nP\u00e9cs city, poet and of course the denominator of our high school. This device\nand system has several functions with subjects and scientific fields and its\nframework can be extended. <\/p>\n\n\n\n
Our aim was to create a complex measuring device\n(system) for physics, chemistry, biology and health lessons in schools. For\nconstructing and using the device, it was necessary to have mathematic and\ninformation technology knowledge. With the help of this instrument, experiments\nand measurements during lessons are faster, more effective, expressive and\nprecise. Moreover, it can contribute to healthy lifestyle through its health\nmeasurement system. According to our opinion, this kind of educational tool\nwith its complexity is an innovation and suitable for schools. <\/p>\n\n\n\n
The JanusMeter is a universal digital measurement system for science lessons. The measuring units transfer the measured data through WiFi to a control unit, which sends everything to a PC or a smartphone. The program stores the data and creates a graph. Every unit has a WeMos D1 Mini microcontroller, which reads the sensor\u2019s data, processes it and transfers everything to the control unit through WiFi. The communication can occur on the school\u2019s internet system or directly with the control unit. The measuring units function with lithium batteries and a self-developed program operates them. The plastic boxes of the device are self-designed and self-made by a 3D printer. The calibration of every unit was also made by our team. We put an emphasis on the graphic design of the PC\u2019s and smartphone\u2019s visualization. The platform is user friendly so students can easily understand it. <\/p>\n\n\n\n
Why innovative?<\/strong><\/strong><\/p>\n\n\n\n The \u201cBRAIN\u201d, the control unit<\/strong>: The \u201cbrain\u201d of the JanusMeter is placed in a uniquely designed 3D printed box. It is a Raspberry Pi computer and a router. The Raspberry Pi is mainly developed for educational purposes, which uses an ARM architectured system chip (SOC). It is perfect for this purpose because of its low price.<\/p>\n\n\n\n The user interface: <\/strong>The user interface is driven by Node-Red, which is designed for smart devices and retrieving its data. This program provides the user interface for students and teachers on smartphones and PCs. The user interface looks modern and understandable for everyone. Node-Red is a flow based programming language, available for everybody and it can be modified simply so students are able to extend the given complex system and they can add their own calculations too.<\/p>\n\n\n\n The data retrieved by the measurements are stored in a diary every second in chronological order.<\/p>\n\n\n\nngg_shortcode_0_placeholder\n\n\n\n Thermometer: <\/strong>The thermometer unit consists of one or more thermometers and a controller. (attachment 5-7th<\/sup> Picture) The control panel uses a WiFi connected computer and a lithium battery so the device is mobile and completely wireless. The digital thermometers are waterproof and they can measure from -55\u00b0C to 125\u00b0C with 0,1\u00b0C accuracy, which is optimal for every physics lesson\u2019s experiments. For example, it is perfectly useful for calorimetrical measurements, where multiple liquid\u2019s temperature is measured.<\/p>\n\n\n\nngg_shortcode_1_placeholder\n\n\n\n Force meter: <\/strong>The force meter (attachment 8-10th<\/sup> Picture) is similar to a regular spring type force meter, but this is much more accurate. The size is only larger by a little. The device consists of a load cell, which measures the force and a circuit, which transfers the data through WiFi to the \u201cBrain\u201d. The maximal force measured is 50N, which is approximately 5 kgs. Accuracy is 0,001N so this device is perfectly suited for educational force measurements and experiments.<\/p>\n\n\n\nngg_shortcode_2_placeholder\n\n\n\n Digital stopwatch:<\/strong> The digital stopwatch (Attachment 11-13th picture) is suitable for great accuracy time measurement. Compared to a traditional stopwatch, this device can be started and stopped with proximity and noise sensors. A huge advantage of this feature is that the measurement isn\u2019t influenced by human reaction times. The different starting and stopping options are attached to the stopwatch unit with a 3,5mm jack cable. The jack cable is cheap and easily replaceable in case it is damaged. The controller of the stopwatch contains a battery and a WiFi module so measurements are directly transferred to the control unit, which processes the data and sends them to the users. The time measurement takes place inside the device so it can be 0,001 second accurate.<\/p>\n\n\n\nngg_shortcode_3_placeholder\n\n\n\n Voltage and current meter:<\/strong> This unit is used to measure voltage and current at the same time (Attachment 14-16th picture). The device is connected with 3 banana plugs which is a very common method of bounding. Compared to a traditional multimeter this device doesn\u2019t need pre-set ranges. The box of this unit has a lithium battery, a WiFi module and a 16 bit ADC, (analog to digital converter) which provides the accuracy of the result. Voltage can be measured from 0 to 20 V and with 0,001 V accuracy while amperage is between -5 and 5A with 0,01A accuracy. This device is suitable for every experiment during the physics lesson.<\/p>\n\n\n\nngg_shortcode_4_placeholder\n\n\n\n Further measuring units:<\/strong><\/strong><\/p>\n\n\n\n \u2022 PH\nsensor:<\/strong> Solution\u2019s PH measurement digitally. It is well designed for\nexperiments, where the solution\u2019s PH is stable. (Attachment 17-18th picture)<\/p>\n\n\n\n \u2022 Blood\nglucose meter:<\/strong> Its operation is similar to the traditional ones, fingertips\nhave to be pierced and the blood drop must be placed on the test strip.\n(Attachment 19-20th picture) <\/p>\n\n\n\n \u2022 Pulse\noximeter: <\/strong>It offers pulse and blood oxygen level measurement by putting our\nfinger into the unit. (Attachment 21-23rd picture)<\/p>\n\n\n\n \u2022 Skin\nimpedance measurement: <\/strong>The skin impedance called galvanic skin response\n(GSR) is based on the skin\u2019s electrostatic impedance change. The GSR analysis\nis based on the assumption that skin resistance varies with the state of sweat\nglands in the skin due to stress situations and we are not able to perceive\nwithout this device. (Attachment 24-26th picture)<\/p>\n\n\n\n \u2022 Body\nposition monitor:<\/strong> It is a special device, which is capable of measuring the\nactual position of a human body or objects. As an extra feature, we have\nconstructed a simulation program for this unit, which shows the state of our\nbody. The program is made by Unity and it receives the rotation\u2019s data from the\ncontrol unit. These data are projected on a 3D human model, which is rotating\naround its stem and different bends can be presented as well. The usage of this\ndevice is suggested for backbone examinations and body position\ntreatments. <\/p>\n\n\n\n Furthermore, this device is also functioning as an\naccelerometer, which is used for acceleration and angle measurements.\n(Attachment 27-30th picture)<\/p>\n\n\n\nngg_shortcode_5_placeholder\n\n\n\n Finally, we would like to express our gratitude to our school for the support, which enabled us the chance to develop JanusMeter. We would also like to thank for the opportunity to present our product on various exhibitions and competitions. We would also like to thank our families the financial support and Mr. Peter Dlusztus coordinative teacher that he helped our project. <\/p>\n\n\n\n Worthy coins don\u2019t come from barren ores<\/em><\/p> Only from pure silver or shiny gold<\/em><\/p>Janus Pannonius<\/cite><\/blockquote>\n","protected":false},"excerpt":{"rendered":" Our multifunctional measurement system\u2019s name came from the multi-faced ancient Roman god Janus and Janus Pannonius, bishop of P\u00e9cs city, poet and of course the denominator of our high school. This device and system has several functions with subjects and scientific fields and its framework can be extended. Our aim […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-506","page","type-page","status-publish","hentry"],"yoast_head":"\n