Application Research Of The Analog Front End ADAS1000 In Wearable Medical Devices

With the speeding up of aging population and improving of material standard of living, people’s health consciousness and health requirements are also growing in. The traditional physician-patient face to face diagnostic model has been unable to meet the huge demand for health care. All of this is promoting medical model to transfer from treatment centered to prevent and health care centered. Medical facility is also developing toward small wearable devices applied to individual and family instead of large and complex equipment used in hospitals.At present, cardiovascular disease has become one of the main diseases which is harmful to people’s health and quality of life. ECG (Electrocardiograph) can help diagnose a variety of cardiovascular disease, is one of the commonly used clinical examination. The measurement method of DCG (Dynamic Electrocardiogram) is generally realized by Holter monitor, but because of its’complicated operation, inconvenient to carry and need of professional guidance from doctor, it is not suitable for home use. Therefore, this paper designed a medical equipment device based on wearable technology. The device can do long time continuous monitoring of ECG and respiration motion signal, and can be embedded in a vest or other clothes. It has the advantages of small in size, convenient to use and low power consumption. The device mainly composed of an analog front end ADAS 1000 which is in charge of ECG data acquisition, a respiration motion capture module using respiratory inductive plethysmography technique, and a low power consumption MSP430 microcontroller responsible for data transmission and processing. The data collected can be transmitted to PC through RS-232 interface for analysis or stored in other smart terminal through Bluetooth. The whole system is powered by Li battery, and can be charged through Micro USB interface.After finished the design and debugging work of hardware, the initialize and operating program has been completed. At last, the whole system has been tested and has achieved the goal of signal acquisition and transmission function. Experiment shows that the design scheme of the wearable physiological signal acquisition system proposed in this paper is feasible.The research of wearable device would play an important role in biomedical engineering field.