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Four-electrode human body impedance heart rate signal acquisition circuit and method

A technology of human body impedance and heart rate signal, which is applied in the measurement of pulse rate/heart rate, medical science, sensors, etc. It can solve the problems of heartbeat signal interference, inability to obtain heart rate accurately and effectively, and achieve accurate detection of heart rate, suppression and exclusion of exercise The effect of interference and suppression of baseline drift

Inactive Publication Date: 2018-03-27
CHIPSEA TECH SHENZHEN CO LTD
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Problems solved by technology

Although this method can collect electrical impedance signals through the radial artery of the arm, the heartbeat signal obtained in this way has relatively more interference, and the heart rate cannot be obtained accurately and effectively.

Method used

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  • Four-electrode human body impedance heart rate signal acquisition circuit and method
  • Four-electrode human body impedance heart rate signal acquisition circuit and method
  • Four-electrode human body impedance heart rate signal acquisition circuit and method

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] See attached figure 1 Shown is a schematic circuit diagram of the four-electrode impedance information collection circuit implemented by the present invention. As shown in the figure, the impedance information and heartbeat information are measured by four-electrode hand-held contact or foot-step contact. N+ and N- are the generating electrodes and receiving electrodes of the excitation current, and I+ and I- are the measuring electrodes, that is, the excitation currents of different frequencies are output from N+ and N-, and then converted into impedance by measuring the voltage signal betw...

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Abstract

The invention discloses a four-electrode human body impedance heart rate signal acquisition circuit and method. The circuit comprises at least four electrodes, N+ and N- are an excitation current generating electrode and an excitation current receiving electrode, I+ and I- are measuring electrodes, excitation current with different frequency is outputted between N+ and N-, voltage signals betweenI+ and I- are measured, sampling signals are amplified by a sampling signal amplification circuit after sampling, capacitors are serially connected among the I+ and I- measuring electrodes and the sampling signal amplification circuit, invalid direct-current components in the signals can be effectively filtered, resistors are connected between N+ and I+ and between N- and I-, so that influence ofpolarization voltage can be eliminated, and the problem of baseline drift is solved.

Description

technical field [0001] The invention belongs to the technical field of impedance measurement, in particular to a circuit and a method for obtaining a heart rate signal by measuring the impedance of a human body. Background technique [0002] In recent years, with the improvement of people's living standards, people pay more and more attention to their own health. For example, in addition to paying attention to their body weight, people also start to pay more attention to the content of body fat, so that they can more accurately grasp the degree of fat or thinness of themselves. There are various methods to measure fat content technically, such as classic underwater weighing method, CT scanning method, and body impedance measurement method. [0003] The basic principle of the human body impedance measurement method is that human body fat contains very little water, so its impedance is relatively high compared to other tissues of the human body; by measuring the body impedanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024A61B5/053A61B5/00
CPCA61B5/024A61B5/053A61B5/0537A61B5/7225A61B5/7246A61B5/725
Inventor 李晓刘文尤杰
Owner CHIPSEA TECH SHENZHEN CO LTD
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