01-07-2013, 04:27 PM
Biomedical Data Transmission System
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INTRODUCTION
This Biomedical Data Transmission System Using Zigbee was developed with embedded system technologythis electronics system collects the data about a patient with in per-defined Time intervals using different measurement like temperature ;heart beat etc. and will transmitted the data
In standalone application data acquision system,the output may be in the form of display,Buzzer,memory storage devices etc.these device placed in order to collect the data and,This data can be transmitted to centrally located pc servers for further analysis and storage via different communication medium like zigbee,serial GSM technologies.these can also be called as a Medicare system
There is a critical need for more cost efficient solutions for supervision/monitoring patients during and after surgery, as well as when the patient is at home. Advanced sensors combined with wireless communication will give reduced costs, improved monitoring, and better life quality for the patient. This project developed, implemented and tested a first version of a biomedical sensor network for the future wireless hospital and home care. The sensor network comprised four different sensors, and was tested in a hospital environment.
OVERALL PROJECT OBJECTIVE
The overall objective was to develop, implement and test a biomedical DATA TRANSMISSION SYSTEM comprising body sensors that communicate with the patients control device for monitoring and external communication. The project focused especially on biomedical data transmission communication and multi-sensor signal integration.
PROJECT DISCRIPTION:
In today’s world enemy warfare is an important factor in any nation’s security. The national security mainly depends on army (ground), navy (sea), air-force (air). The important and vital role is played by the army soldier’s. There are many concerns regarding the safety of these soldiers. As soon as any soldier enters the enemy lines it is very vital for the army base station to know the health status of all soldiers. In our project we have come up with an idea of tracking the soldier as well as to give the health status of the soldier during the war, which enables the army personnel to plan the war strategies.
The Hardware consists of controller. The sensor used is Temperature (Engine temperature) and Heartbeat sensor. The sensors which give the analog output processed using internal ADC.
Pressure Transducer
The Memscap Wireless Pressure Transducer (WPT) developed during the BWSN project is based on the Memscap SP840 series of physiological pressure sensors with disposable dome. Memscap WPT is providing digitized and pre-scaled pressure readings over a wireless interface. The wireless link is utilizing the TinyOS based BWSN Sensor Message Format over an IEEE 802.15.4 compliant radio.
VTT Heart Monitoring Accelerator
Heart acceleration monitoring Heart acceleration monitoring can be used to gather additional information of hearth operation both during surgery and post operation treatment. There is a risk of graft occlusion in coronary artery bypass grafting, and acceleration monitoring provides real time data of myocardial function: the method facilitates beat to beat detection of regionalmyocardicaliscemia when heart surface acceleration is monitored during cardiac surgery. During post operational phase, it provides uninterrupted monitoring in of iscemia and arrytmia. Acceleration monitoring has some benefits over traditional methods: It's more sensitive than EKG or invasive hemodynamic monitoring and otherwise than echocardiography or angiocardiography, it can be used for constant monitoring. Facilitation of local detection of parenchymal inscemia is an added value.
DEVICE SPECIFICATION
Proper EEG or ECG signal acquisition is carried out using filters for noise sup Pression and amplifiers to enlarge the signal amplitude as much as possible, while keeping it within the input voltage range of the analogue-digital converter (ADC). The task of the ADC is then to digitize the analogue voltage with a resolution high enough to represent the original signal. In other words, the quantization is the process of mapping a continuous range of values by a nite set of integer values. These values can then be collected by a microcontroller (MCU) which maintains the connection with the wireless transmitter. It is always dependent on the application, what we consider to be high enough voltage resolution.
Hardware Design
The requirements that the EEG/ECG monitoring device have to meet have beenalready partly touched upon. That chapter served as a starting point for the final hardware design. It is now necessary to lay down the whole spectrum of the intended functionality of the device. In other words, the full speciation has to be defined, so that the complete block scheme can be drawn. Once the entire system is given, and all the connections between the blocks are known, the task can be broken down into the implementation of the separate parts. (Chen, 2008)
Illustrates a functional diagram of the whole system, including themonitor node, the receiver node and the computer. The role of the monitor node is to acquire the samples at the specified sample rate. The receiver node is responsible for the reception of the samples and forwarding the samples to the computer. The digital signal post-processing and recoding is than carried out on the more powerful PC. I intentionally pushed all the resource hungry or lengthy operations to the computer side to lighten the load on the battery powered node. There are some ECG applications though |such as arrhythmia monitoring or cardiac alarm systems|, where it is necessary to pre-process the raw data real time on the monitor side. This is not the case in \passive" monitoring, which saves some valuable energy and CPU time.
CONCLUSION
1. The focus of this thesis has been to design a compact EEG/ECG monitoring device using commercially available electronic components.
2. The projectwork is presented starting with the objectives and the speciation’s that were laid down.
3. The following chapters then introduce the main building elements of the
designed circuit, and support the decisions that were made regarding component selection. The layout of the monitoring device prototype was also designed, taking into account the fabrication technology available in the departmental work-shop.