ERNESTO SIFUENTES DE LA HOYA,RAFAEL ELICER GONZALEZ LANDAETA
申请号：
MX2015003286
公开号：
MX2015003286A
申请日:
2015.03.12
申请国别(地区):
MX
年份:
2016
代理人:
摘要：
The present disclosure is related to a circuit for measuring the heartbeat in a non-invasive manner, beat to beat. The invention consists in detecting the pulse through a piezoresistive sensor, placed on the skin in those areas where large arteries are found. The piezoresistive sensor is directly connected to a digital input and output microcontroller pin, without intermediate active electronic circuits between the sensor and the microcontroller. A capacitor is also connected to a microcontroller digital pin, through which is charged to a voltage level depending on the power of the microcontroller, and is discharged through the sensor’s resistance which changes each time it detects a heartbeat. These changes in the resistance also produce changes in the discharging time of the capacitor, and the microcontroller measures these changes. Using an algorithm implemented in the same microcontroller used to build the interface, is possible to estimate the frequency from a heart rate signal. For energy saving purposes, the sensor is fed through the input and output terminals of the microcontroller, which supplies a current to the sensor following a specific programming logic. The numerical representation of the frequency is obtained using any external device to the circuit, having a wireless communication module.En esta patente de invención se describe un circuito para medir la frecuencia cardiaca de forma no invasiva latido a latido. La invención consiste en detectar el pulso mediante un sensor piezorresistivo colocado sobre la piel en aquellas zonas del cuerpo donde se encuentren arterias de gran tamaño. El sensor piezorresistivo se conecta directamente a un pin digital de entrada y salida de un microcontrolador, sin necesidad de circuitos electrónicos activos intermedios entre el sensor y el microcontrolador, sin necesidad de circuitos electrónicos activos intermedios entre el sensor y el microcontrolador. Un condensador también se conecta a un pin digital del microcontr
