Projects:2013S2-U1 Wireless Electrocardiography System - Revision history

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T15:35:10Z

‎Stage 3:Synchronisation and Visualisation

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T15:33:57Z

‎Stage 3:Synchronisation and Visualisation

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T15:31:48Z

‎Stage 3:Synchronisation and Visualisation

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T15:25:20Z

‎Stage 3:Synchronisation and Visualisation

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T15:25:00Z

‎Stage 3:Synchronisation and Visualisation

A1203424: /* Stage1:Sensing and Data Acquisition */

2014-06-05T15:22:17Z

‎Stage1:Sensing and Data Acquisition

A1203424: /* Project Information */

2014-06-05T15:21:45Z

‎Project Information

A1206056: /* Stage1:Sensing and Data Acquisition */

2014-06-05T14:26:26Z

‎Stage1:Sensing and Data Acquisition

A1203424: /* Project Information */

2014-06-05T14:21:37Z

‎Project Information

A1203424: /* Stage 3:Synchronisation and Visualisation */

2014-06-05T14:21:02Z

‎Stage 3:Synchronisation and Visualisation

@@ Line 72: / Line 72: @@
 **'''Result'''
-[[File:Patient.png]]
+[[File:Plot.png]]
 =='''Testing'''==

← Older revision		Revision as of 15:33, 5 June 2014
Line 70:		Line 70:

	The packages of android.view and android.graphics provide programmer render 2D drawing graphic onto a Canvas. A SurfaceView is a special implementation of View that creates its own dedicated Surface for the application to directly draw into it. The relationship between SurfaceView and Canvas is that the window is tied to a SurfaceView and asks the canvas to draw onto. When the SurfaceView is initialised, SurfaceHolder can be created by calling getHolder() method once and Canvas can be retrieved with lockCanvas()[13]. After the ini- tialisation, the ECG data contained in three dynamic ArrayLists will be plotted upon the Canvas. As a result of 24 bits resolution and the type of each point that be plotted is integer, the normalisation of value need to be executed before plotting. During the process of Bluetooth data extraction mentioned above, the program will keep track the minimum and maximum values of three channels in the dynamic ArrayLists every 50ms. The data value is actual value subtract the minimum one and value range is maximum subtract the minimum.		The packages of android.view and android.graphics provide programmer render 2D drawing graphic onto a Canvas. A SurfaceView is a special implementation of View that creates its own dedicated Surface for the application to directly draw into it. The relationship between SurfaceView and Canvas is that the window is tied to a SurfaceView and asks the canvas to draw onto. When the SurfaceView is initialised, SurfaceHolder can be created by calling getHolder() method once and Canvas can be retrieved with lockCanvas()[13]. After the ini- tialisation, the ECG data contained in three dynamic ArrayLists will be plotted upon the Canvas. As a result of 24 bits resolution and the type of each point that be plotted is integer, the normalisation of value need to be executed before plotting. During the process of Bluetooth data extraction mentioned above, the program will keep track the minimum and maximum values of three channels in the dynamic ArrayLists every 50ms. The data value is actual value subtract the minimum one and value range is maximum subtract the minimum.
		+	**'''Result'''
		+
		+	[[File:Patient.png]]

	=='''Testing'''==		=='''Testing'''==

← Older revision		Revision as of 15:31, 5 June 2014
Line 59:		Line 59:

	The figure shows the frame of the user file activity, which is used to create patient file includes name, birthday and gender and store the information into the table named as profiles in the SQLite Database. With the support of android.database.sqlite package in this application, the SQLiteOpenHelper class helps user create database, and the SQLiteDatabase class is the base class for accessing database[8]. By clicking the start button, the patient file will be created and new test will be processed in the real-time plotting activity. This activity was designed by previous team, for testing and verifying data structure purpose, age-calculating was be added inside. By calculating the difference between current time and the input birthday from user, it will auto display the age in the third line. This activity also has been modified that enable to detect the same patient detail that stored in profiles and displays the alert dialog if wants to start a new test.		The figure shows the frame of the user file activity, which is used to create patient file includes name, birthday and gender and store the information into the table named as profiles in the SQLite Database. With the support of android.database.sqlite package in this application, the SQLiteOpenHelper class helps user create database, and the SQLiteDatabase class is the base class for accessing database[8]. By clicking the start button, the patient file will be created and new test will be processed in the real-time plotting activity. This activity was designed by previous team, for testing and verifying data structure purpose, age-calculating was be added inside. By calculating the difference between current time and the input birthday from user, it will auto display the age in the third line. This activity also has been modified that enable to detect the same patient detail that stored in profiles and displays the alert dialog if wants to start a new test.
		+
		+	*'''Real-time Plotting'''
		+	This activity is the major component of this ECG application. After the new test option is selected, this activity will perform three key tasks: Bluetooth data extraction, data storing and visualisation.
		+	**'''Bluetooth data extraction'''
		+	When the incoming data stream is detected by Bluetooth socket, a buffer, size of 60 bytes, will start to receive the data package into the array as ”unpacking”. After the buffer is loaded, before the data package be extracted into three separate dynamic ArrayList that represent three channels of ECG waveform, each three bytes per datum will be converted into one integer named as result and then put into each channel respectively. The code below illustrates the method that accomplish these two procedures, the parameter tmp refers the buffer with size of 60 bytes and len refers to the length of the data from Bluetooth module.
		+	**'''Data storing'''
		+	While the data is continuously extracted in the buffer, function named write(LinkedList<Integer> values) will store the data into dat file, belongs to the file with format of name.birthday.gender.fileindex. dat. After the data is converted into int result, all data stream will be stored in the linkedlist, named values for future review.
		+	**'''Visualisation'''
		+	In this activity, a Timer is set to send the extracted data of three channels to DrawtoView function every 50ms to plot and update the heart beat in the text view widget. The code above shows the plotting procedure of one channel for every 50ms: (1)Create an integer dynamic ArrayList (2) Copy the extracted data of one channel (3)Pass the data that contains max and min value into DrawtoView function in SurfaceView (4) Clear the ArrayList and update the status for the next repetitive action.
		+
		+	The packages of android.view and android.graphics provide programmer render 2D drawing graphic onto a Canvas. A SurfaceView is a special implementation of View that creates its own dedicated Surface for the application to directly draw into it. The relationship between SurfaceView and Canvas is that the window is tied to a SurfaceView and asks the canvas to draw onto. When the SurfaceView is initialised, SurfaceHolder can be created by calling getHolder() method once and Canvas can be retrieved with lockCanvas()[13]. After the ini- tialisation, the ECG data contained in three dynamic ArrayLists will be plotted upon the Canvas. As a result of 24 bits resolution and the type of each point that be plotted is integer, the normalisation of value need to be executed before plotting. During the process of Bluetooth data extraction mentioned above, the program will keep track the minimum and maximum values of three channels in the dynamic ArrayLists every 50ms. The data value is actual value subtract the minimum one and value range is maximum subtract the minimum.

	=='''Testing'''==		=='''Testing'''==

@@ Line 55: / Line 55: @@
 When the user open the Bluetooth, using the BluetoothAdapter, the start discovery method will be called. Device discovery is a scanning procedure that searches the local area for Bluetooth available de- vices. With the help of BroadcastReveiver, the discovery finished and available device found methods will be returned. When the specific available device is selected, it will create an RFCOMM BluetoothSocket ready to start a secure outgoing connection to this remote device.
-**'''User File'''
+*'''User File'''
 [[File:Patient.png]]

@@ Line 51: / Line 51: @@
 **'''Bluetooth Communication'''
 [[File:Blue.png]]
 The Android platform includes support for the Bluetooth network stack, which allows a device to wirelessly exchange data with other Bluetooth devices. The package android. bluetooth provides all the necessary APIs that make application wirelessly connect to the other Bluetooth device, enabling point-to-point wireless feature.
 When the user open the Bluetooth, using the BluetoothAdapter, the start discovery method will be called. Device discovery is a scanning procedure that searches the local area for Bluetooth available de- vices. With the help of BroadcastReveiver, the discovery finished and available device found methods will be returned. When the specific available device is selected, it will create an RFCOMM BluetoothSocket ready to start a secure outgoing connection to this remote device.
@@ Line 56: / Line 57: @@
 **'''User File'''
 [[File:Patient.png]]
 The figure shows the frame of the user file activity, which is used to create patient file includes name, birthday and gender and store the information into the table named as profiles in the SQLite Database. With the support of android.database.sqlite package in this application, the SQLiteOpenHelper class helps user create database, and the SQLiteDatabase class is the base class for accessing database[8]. By clicking the start button, the patient file will be created and new test will be processed in the real-time plotting activity. This activity was designed by previous team, for testing and verifying data structure purpose, age-calculating was be added inside. By calculating the difference between current time and the input birthday from user, it will auto display the age in the third line. This activity also has been modified that enable to detect the same patient detail that stored in profiles and displays the alert dialog if wants to start a new test.

@@ Line 14: / Line 14: @@
 =='''Outline of Individual Work'''==
 ==== '''Stage1:Sensing and Data Acquisition''' ====
-'''Textile Electrode'''
+*'''Textile Electrode'''
 A textile electrode is produced to minimise any motion inconvenience for the patients that might have caused during the sensing procedure. Research on the materials of the textile electrodes has been carried out, in order to achieve a comfortable, flexible and compatible to small to medium sized patients.We have agreed to use the non-conductive elastic clothing as the material of the textile electrodes, due to its elastic flexibility provided, and the compatibility to cut through hole to the clothing without destroying the whole clothing.
-'''Analogue Front End Microcontroller'''
+*'''Analogue Front End Microcontroller'''
 The chosen microcontroller is the ADS1293. ADS1293 features its own Evaluation Module, ADS1293EVM which will be used in this project. ADS1293EVM evaluation module helps designers evaluate the operation and performance of the ADS1293 Analogue Front End for ECG Monitoring.
-'''Serial Peripheral Interface'''
+*'''Serial Peripheral Interface'''
 ADS1293EVM will be operated in the slave mode, and will be set up by the master device. Microcontroller used as the master device is the Arduino Xadow Main board, and Xadow Breakout board. Serial Peripheral Interface is a synchronous serial data link, which is used for short distance, single master communication.

← Older revision		Revision as of 15:21, 5 June 2014
Line 8:		Line 8:

	[[File:Overview.png]]		[[File:Overview.png]]
		+
		+
	The prototype we delivered need be able to perform several tasks: (1) Sensing and Data Acquisition: acquire the voltage signal generated by the test subject from textile electrodes, filter out the unwanted noise, amplify the signal to a manageable level, convert this analog signal to digital signal and connect to Bluetooth device for data transferring ; (2) Communication: package the data which is acquired from Analog Front End and transmit it to Android device wirelessly via Bluetooth; (3) Synchronisation and Visualisation: extract the received data package, create patient file and received data in database, plot real-time ECG waveform and review the patient history in log-file.		The prototype we delivered need be able to perform several tasks: (1) Sensing and Data Acquisition: acquire the voltage signal generated by the test subject from textile electrodes, filter out the unwanted noise, amplify the signal to a manageable level, convert this analog signal to digital signal and connect to Bluetooth device for data transferring ; (2) Communication: package the data which is acquired from Analog Front End and transmit it to Android device wirelessly via Bluetooth; (3) Synchronisation and Visualisation: extract the received data package, create patient file and received data in database, plot real-time ECG waveform and review the patient history in log-file.

@@ Line 12: / Line 12: @@
 =='''Outline of Individual Work'''==
 ==== '''Stage1:Sensing and Data Acquisition''' ====
-acquire the voltage signal generated by the test subject from textile electrodes, filter out the unwanted noise, amplify the signal to a manageable level, convert this analog signal to digital signal and connect to Bluetooth device for data transferring
+'''Textile Electrode'''
 ===='''Stage 2: Communication''' ====
 In this stage the data which is acquired from Analog Front End will be packaged and transmitted to Android device wirelessly via Bluetooth

@@ Line 7: / Line 7: @@
 '''System Overview'''
-[[File:Overview.jpg]]
+[[File:Overview.png]]
 The prototype we delivered need be able to perform several tasks: (1) Sensing and Data Acquisition: acquire the voltage signal generated by the test subject from textile electrodes, filter out the unwanted noise, amplify the signal to a manageable level, convert this analog signal to digital signal and connect to Bluetooth device for data transferring ; (2) Communication: package the data which is acquired from Analog Front End and transmit it to Android device wirelessly via Bluetooth; (3) Synchronisation and Visualisation: extract the received data package, create patient file and received data in database, plot real-time ECG waveform and review the patient history in log-file.

@@ Line 38: / Line 38: @@
 *'''Software'''
 The development environment used for this application design is Eclipse (Version 4.3) + ADT (Android Developer Tools) plug in, written in Java language and the layout and for- mat designed by XML (Extensible Markup Language). Eclipse is an integrated development environment (IDE). It contains a base workspace and an extensible plug-in system for customising the environment. In additional, a serial port monitoring tool, namely AccessPort, is used to simulate a Bluetooth serial port profile (SPP) communication, in order to test data- storing and functions of the application.
 =='''Testing'''==