![]() In the systems of references and promising results were obtained, the only important disadvantage of both is the size of the designed system, which could make them unfeasible for use in various environments. Other research focused on the development of radar antennas that allow obtaining signals for monitoring vital signs inside a car. In another work, the author proposes a system that uses a dual array of antennas to compensate for the noise of the signal obtained. ![]() However, the results were favorable only in normal behaviors of the simulated signal. a system that uses Doppler radar has been proposed, whose e ectiveness was tested in a system that simulates the biometric signals of an infant. Regarding monitoring systems without physical contact, in Ref. The signal obtained had a ninety percent accuracy. An optical sensor was used to measure heart rate by plethysmography. a system based on an FPGA development board was designed. However, due to the size of the system, its battery did not last long and needed to be replaced every 3 days. The system obtained heart rate readings within a range that the author considered acceptable. In Ref., 76 subjects were tested for 50 days with a sensor system placed on a patch that transmitted the obtained data to an online database. The system was able to obtain accurate measurements of cardiac activity in its normal state, but was unable to detect abnormalities caused by sleep apnea. a fiber optic constructed sensor pad was proposed to monitor heart rate in people diagnosed with sleep apnea. Monitoring heart rate without the need for physical contact. The use of radar devices, mainly Doppler radar, has even been suggested as part of a system designed for To avoid the problems and inconveniences of the use of electrodes or con-tact sensors, research has been carried out that proposes the implementation of systems that do not require direct or excessively intrusive placement for the patient. In order to guarantee that the signal received by the system is correct. Given these problems, the presence of trained personnel is necessary to periodically check the status of the systems electrodes The greatest number of problems for obtaining the signal are related to the incorrect placement of the electrodes or to patient conditions that modify the signal obtained (sweating, hair in the placement area or feeling of discomfort). ![]() The use of these systems does not entail a risk for the patient, however, considerations must be taken to obtain the most optimal signal possible in order to give an adequate diagnosis. These use electrodes connected to the patient, they detect changes in voltage generated by cardiac activity, pro-cessing them into electrical signals that are more suitable for interpretation. It also determined that this percentage increases with age, both in men and women.Ĭurrently the most commonly used systems for heart rate detection are ECGs incorporated into vital signs monitors. The American Heart Association (AHA) in its studies from 2015 to 2018, determined that in the United States, the prevalence of cardiovascular diseases in the population of adults older than 20 years is 49.2% in total. ![]() It is necessary to be able to obtain an adequate signal from this vital sign in order to determine the patients condition, make an adequate diagnosis and identify possible pathologies such as arrhythmia, arterial obstruction, heart damage or heart failure. Heart rate monitoring in a person is a commonly used practice in medical care. Keywords Non-contact monitoring, heart rate, Doppler Radar, band pass filter. The results of the tests carried out are presented and it is determined if the method meets the objective. Facultad de Ingenieria Universidad Nacional Autonoma de MexicoĪv Universidad 3000, Ciudad Universitaria, Coyoacan, 04510, CDMX, MexicoĪbstractThe proposal of this work is to detect the heart rate of a person at rest, using a method that implements the use of Radar Doppler. ![]()
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