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Safe and Sound

12 Posts authored by: mbozdal
Time is running and I am away from home with my kits I don't add additional hardware functionality yet but change the user interface from the previous one. I planned to add RSSI measurements but Ground Operations Centre took all the time. This article is the final one for this design challenge therefore I will explain what I  have done till now and what can be added in the future.   Previously, the helmet was sending one data per second. Now, it is sending 100 data pre second. I acco ...
Deadline is closing and I need to be faster. This week, I created a circuit board and removed the breadboard. The original plan was to add methane sensor but I couldn't find any portable version for the helmet. Usual gas sensors have a heating element which is dangerous for the mining areas so I skipped that part. Below the video, you can see the demonstration of the smart helmet.     Some screenshots from the Ground Operations Centre program. The raw data structure is ##*temp ...
In this article, I will demonstrate the Smart Helmet v0.1 I am always on the move so I struggle to find time but slowly going further. Let's summarise what have done up to now. I am using TI-RTOS. I stack the Wi-Fi booster pack to MSP432. Connect ADXL345 accelerometer and TMP102 using I2C interface. Detect free-fall, inactivity, and send all the data to Ground Operations Center over Wi-Fi using TCP/IP protocol. I coded Ground Operations Center using C# and it still needs some modifications. DLP ...
After recognising having more than 4 days, I took a deep breath and heading to the working prototype. In the previous article, I have made a simple gate control. In this week I made some additional functionality and will demonstrate it on the video. The idea of this part is not allowing the miner to access mining area without the helmet (or can be any safety clothes) so providing the safety. It also records the access control which makes managing and planning easier.   The system is consis ...
Edit: The draft has been published by mistake, therefore, I updated it.   I don't know why but it takes so long to implement access control with NFC. I think I put forward it because it is a separate design from the helmet. Hence, I use a passive tag on the helmet, it is only attached to it and no more work on helmet side. The https://www.element14.com/community/view-product.jspa?fsku=2535894&nsku=74X8084&COM=noscriptDLP-7970ABP NFC transceiver BoosterPack  is the key element ...
I didn't have much time so I used Arduino for the sensor board which makes design cumbersome to fit inside a helmet. However, I have some time this week so I created code for MSP432. ADXL345 can be accessible through either an SPI (3- or 4-wire) or I2C digital interface. I prefer I2C because I have used TMP102 temperature sensor which has I2C interface. Using I2C, I don't need to use additional pins. ADXL345 is not very easy to use. It requires some setting before gathering the data. You may ask ...
I was absent last two weeks, I hope I will catch up the following weeks In the last post, I have written about the socket programming and wifi boosterpack. The next think I need to hook up the sensor boosterpack but there were problems. Although bare-metal code for sensor boosterpack works, the sample code for the TI-RTOS didn't work. I didn't want to use the bare-metal code because it was pretty long and timing can be a problem if I combine wifi module and some other stuff. Also, I don't have ...
Kits have arrived and hands become dirty The next day after kits have arrived, I plugged wifi boosterpack and use the Tera Term for communication. It worked without any coding. Great Well, not really. I wanted to modify the code but I was stuck because I had never used any RTOS. I could use Energia (which is so like Arduino IDE) examples but I want to learn RTOS. It is challenging myself and learning new skills I went over the online training course and get the basics of the TI-RTOS. I can't ...
My kits arrived after unexpected Canada trip. I know what was going to arrive but opening the box was still very exciting Here are some photos   All the family together   Boosterpacks are lying on the A4 paper so this will give you the rough size of the components. I love the NFC tag It is so thin like a stamp. I can stick it on the helmet for entrance control.   MSP432 and Wi-Fi boosterback are out of the bag because I will start with them My plan is now getting start ...
My safety helmet design can be divided into three categories. The first category is data acquisition from sensors and processing them to predict the potential explosion. The second is tracking the miners and determine their current or immediately pre-accident location. The third one is communication between the workers and ground operations centre(GOC). This week's blog is related to second and third parts because the tracking system is related to the communication system. There was a delay to s ...
In the previous post, I have talked about my proposed project. Hence my project primarily targets to improve the safety of the miners, it has to be ATEX compatible (in Europe) or intrinsically safe (in the USA). It looks like test centres provide their test in accordance with the multiple regulations so you can get the approval with one test for the most part of the world. In this week's blog post, I will talk about some regulations for electronics in explosive areas like mines. I don't have any ...
Yesterday, I got an email from element14 which inform that my proposed project is accepted for Safe & Sound design challenge. The aim is "designing a wearable that protects a person from personal and environmental risks, or monitors personal health or protects personal property from theft" and the only requirement is using Texas Instruments’ latest microcontroller. My project is building a safe working place for the miners. I decided to build this project because, in the 21st century, ...