外文翻译 - 设计基于AT89C51单片机除颤器.doc

1、The Design Defibrillators Based on AT89C51 MicrocontrollerAbstract Defibrillator is an instrument that produces electrical design given to people with heart failure, with the aim of converting fibrillation arrhythmia back to normal sinus rhythm. Planning begins with setting the display setting energ

2、y and energy used. Setting the energy that is made, namely: 10, 15, 20, 25 and 30 joules, with a ratio of 1: 10 of the actual energy. From the results of the testing tool proves that the device works fine and runs as planned.Keywords: electricity on the heart, charge and discharge capacitor, microco

3、ntrollerI. IntroductionThe health sector is an area that became the main priority in the development of the Indonesian nation. targets to be achieved is a healthy life, both materially and spiritually for every resident of Indonesia. For that, the necessary science and technology that supports the d

4、evelopment of the health world is the field of medical devices. In view of heart disease is a disease that should receive special attention, it is not excessive if the use of defibrillators plane must always be ready to be used properly and carefully so that they can be relied upon in dealing with e

5、mergencies from heart attack or other heart disorders. Defibrillator is an instrument that produces electrical stimulation given to patients with heart failure, with the aim of converting arrhythmia or fibrillation back to normal sinus rhythm. The basic system of the aircraft defibrillator is chargi

6、ng and discharging capacitors. Disposal or discharge the capacitor, can produce energy to provide energy absorbers that can be accepted by the heart.II. The Basic Theory2.1 HeartThe heart is an important organ that functions to pump blood in the body. Generally the size of the human heart a little b

7、igger than bigger than his fist. Adult women, heart weighs approximately 250 grams, of temporary for adult males can reach 300 grams. The heart has three layers, namely:a. Endocardium: the inner layer of heart cells and flat epitelim connective tissue. b. Myocardium: is the inside of the heart muscl

8、e wall is acontracting wall .c. Pericardium: the outside of the heart.The heart is divided into 4 rooms namely: right atrium (Porch),right ventricle (chamber), right, left atrium (Porch) left, left ventricle (chamber) left. Atria and ventricles are separated by a valve. In one pulse, right and left

9、heart valves open and close function to regulate blood flow in one direction. The heart has four valves are: tricuspid valve, pulmonary valve, mitral valve, and aortic valve (see figure 1).Figure1: 4 Heart valvesWhen the heart beats (called systole), the heart pumps blood. This process includes 2 st

10、ages. The first stage right and left atrium contracted at the same time pumping blood into the right and left ventricle. In the second stage right and left ventricle to contract together to pump blood out of heart. When heart muscle weakness (diastole), blood return to fillthe right atrium and left

11、until the next pulse arises. Right and left side of the heart have different functions. The right hand side of the heart blood flow throughout the body and have low oxygen levels and release carbon dioxide. While the left side of the heart of oxygen-rich blood flow from the lungs to be distributed t

12、hroughout the body to other organs can function properly.2.2 The Electrical Systems At HeartType of cardiac muscle possessed similar to striated muscle (such as muscle to move the framework of the body) but has a working properties similar to smooth muscle (such as muscles that move the digestive sy

13、stem) is slow to react to stimuli and to work under the influence of the autonomic nervous reflexes. To be able to pump blood with the proper rhythm, the heart requires power to move. The heart does not move by itself. Theres something made him keep moving. Cardiac motion resources depends heavily o

14、n the working ability of a group of cells that are capable of producing electrical energy in sufficient quantities to make it keep moving. These cells produce electrical impulses that are thentransmitted by cells that spread on the surface activator heart and to make it throb. These cells called the

15、 sinoatrial node (SA node) located in the Atrium on the right. In addition to having the SA node, the heart also has special fibers that conduct electrical power distribution on the heart(see figure 2).Figure 2 Pulse Heart in heartFigure 3 Electricity FlowElectrical impulse leaves the SA node to the

16、 right atrium and left. so that the two atria can contract in the same time. This process takes 0.4 seconds. At right and left atrium contracts, blood fills the ventricle electrical impulses and then flows back to the Atrioventricular Node (AV node) which is then distributed to a collection of fibers that are on the right and left heart to the Purkinje fibers located in the right and left heart ventricle until make the second ventricle to c