This project is by a student of university of Liverpool. Project falls in the category of digital and embedded systems. This embedded project is done at bachelors level. Researchers in the field of vibration and movement are trying their best to build a sensor which can monitor whole vibration of the body. In this project a nice approach is made to assess the vibration of a body using HEXIWEAR.
What is Hexiwear?
Hexiwear is an IOT and wearable development platform. Unlike arduino which offers a range of development across multiple domains, hexiwear only focuses on IOT and wearable domain. Its a cool platform to develop wearable applications. Wide variety of sensors e.g temperature, humidity, barometer, gyroscope, light and heart rate are present on their wearable device. Arm cortex-m4 processor is core of the wearable.
Main hexiwear is an octagonal shaped lcd display module. Lcd looks same like an old nokia cell phone with black and white display. Main hexiwear can be inserted in a wrist watch rubber casing. You can wear it and move around. You can even connect your cell phone with your hexiwear while performing every day tasks. Connection between cell phone and hexiwear is on Bluetooth protocol.
With out a development board or workstation hexiwear is of no use. You can develop and test your application on hexiwear workstation and then deploy the stand alone hexiwear module on your wrist watch.
Hexiwear Power user pack
Hexiwear is not just limited to digital watch. Other sensors and electronic components like smoke sensor, relay module, touch pad, keypad, variable resistor and sd card to log data can also be interfaced with hexiwear. A dedicated platform named hexiwear power use pack is built for this purpose. You can test your hardware and deploy the full hexiwear power use pack in field or make a custom pcb(printed circuit board) of your project.
How vibrations are monitored?
To monitor the vibrations gyroscope and 3D accelerometer of the hexiwear is utilized. Barometric pressure sensor is used to asses the up and down movement of the hexiwear. Now you need to know the three crucial factors which predicts the frequency and amplitude on which the body is vibrating.
- Bandwidth of the accelerometer.
- Number of axis.
- Sampling frequency
If you are unable to sort out how it can be achieved just take a look how it is achieved using arduino. Arduino vibration monitoring.
The results of the project are quite satisfactory. Results can be seen on the hexiwear desktop emulator as well as on the hexiwear lcd display.
Filed Under: Knowledge Share, Microcontroller Projects