| dc.description.abstract | In the traditional auscultation examination for cardiovascular diseases (valvular stenosis, atresia), the doctor′s personal experience and analysis is a diagnostic criterion that is difficult to discuss in this diagnosis. Therefore, the study puts forward its own diagnostic criteria. This is a portable digital auscultation tool. The data consists of digitizing the heart sound signal to fully present the sound of the physical signal. On the other hand, it analyzes the stored rational signal, which can be compared with similar cases in the library by machine learning, and provides Auxiliary diagnosis.
The system can be divided into two parts: analog circuit and digital signal processing.
A second-order band communication with different sounds than the circuit part (respectively the heart sound signal : 20~1k Hz and the rattle tube sound signal: 50~1k Hz), combined with a full series of themes and the organization design itself Auscultation head.
After the front end receives the signal, the analog-to-digital converter converts the front end signal. It can use 6.4 kHz micro signal for signal collection in the state of drop, and then use the ultra-low standby Bluetooth to synchronously transmit data to the mobile phone for timely physiological signal monitoring, and at the same time filter the signal through audio amplification The circuit is optimized. The physiological signals that drop the noise can be monitored on the earphones. Finally, the original data is saved in the external micro SD card module, which is convenient for calculation and analysis on the computer side, from the auscultation head, analog circuit design to program design, the communication establishment ratio can reach: 50.6 (dB), write your own physiological communication number as a larger scale and complete diagnosis.
In addition to being able to capture and measure physiological sounds in a high-resolution digital way, this device has the advantages of real-time signal monitoring via APP, time-consuming, small size, and portable operation. Or institutions such as wards, small medical institutions for patients, out-call rescue units, and even personal home communications, to achieve immediate and unenhanced physiological number monitoring. | en_US |