ECG monitorTechnical Field
The invention belongs to the field of monitoring medical instruments, and particularly relates to an electrocardiogram monitor.
Background
Heart disease is one of the major diseases that are always threatening the health of human life, and most of them are patients with recessive heart disease. Although there is a certain probability that a heart disease will be detected in a hospital examination, the difficulty of the examination will increase due to the contingency and unpredictability of the heart attack.
Along with the continuous improvement of the electrocardiographic monitoring technology, the electrocardiographic monitor (EGC) is more and more approved, and brings good news to people with more people. However, the filter bandwidth of a general electrocardiograph monitor is fixed, and the interference of motion artifacts cannot be filtered. Therefore, the general ECG monitor can only realize the detection in the state that the human body lies still, but can not detect in the motion of the human body. Therefore, most users of many electrocardiograph monitors are patients who are determined to have heart diseases, and the electrocardiograph monitors are used in a state of little movement or even no movement at ordinary times. If the ECG monitor can be suitable for people who need to work and study at ordinary times, the heart can be monitored all day long, and people can discover and treat heart diseases early.
Disclosure of Invention
The invention aims to provide an electrocardiogram monitor, which aims to solve the problem that the conventional electrocardiogram monitor can only detect electrocardiosignals when a human body is in a static lying state.
The invention is realized in this way, an electrocardiograph monitor, comprising: a lead electrode; the electrocardiosignal preprocessing module is used for carrying out differential amplification on the electrocardiosignals of the human body, carrying out common-mode suppression on the noise of the external environment and filtering high-frequency signals; a motion sensor module; a tunable bandpass filter; the microcontroller is used for reducing the bandwidth of the adjustable band-pass filter to filter out motion interference signals when the motion sensor module detects that the amount of human motion is large, and adjusting the bandwidth of the adjustable band-pass filter to enable the electrocardiosignals to pass through when the motion sensor module detects that the amount of human motion is small; the electrocardiosignal processing module is used for adjusting the size of the electrocardiosignal; the data processing module is used for storing, transmitting and displaying the electrocardiosignal data and the human motion state data; wherein,
the lead electrode is connected with the input end of the electrocardiosignal preprocessing module; the output end of the electrocardiosignal preprocessing module is connected with the input end of the adjustable band-pass filter; the output end of the adjustable band-pass filter is connected with the input end of the electrocardiosignal processing module; the control end of the adjustable band-pass filter is connected with the microcontroller; the output end of the electrocardiosignal processing module is connected with the microcontroller; the output end of the motion sensor module is connected with the microcontroller; and the input end of the data processing module is connected with the microcontroller.
Preferably, the output end of the electrocardiosignal processing module is connected with the input end of an ADC module of the microcontroller, and the electrocardio data is generated by the microcontroller;
the motion sensor module and the microcontroller are connected by an I2C bus mode or a UART communication mode.
Preferably, the electrocardiosignal preprocessing module comprises an unadjustable band-pass filter for filtering out high-frequency interference signals, and a differential amplifier for suppressing common-mode signals of environmental noise and amplifying electrocardiosignals; the lead electrode is sequentially connected with the non-adjustable band-pass filter and the differential amplifier, and the output end of the differential amplifier is connected with the input end of the adjustable band-pass filter.
Preferably, the frequency range of the non-tunable band-pass filter is 0.1 Hz-10 kHz, and the chip used by the differential amplifier is AD 620.
Preferably, the control mode of the microcontroller on the tunable bandpass filter includes counter control, duty cycle control, level control and frequency control.
Preferably, the tunable bandpass filter includes a switched capacitor filter, an active filter, and a passive filter;
the bandwidth of the passband of the adjustable band-pass filter is adjustable within 0.1 Hz-10 kHz, and the more active the human motion state is, the narrower the bandwidth of the passband is;
the motion sensor module includes an inertial sensor.
Preferably, the data processing module comprises a local display module, a wireless transmission module and a data storage module; the local display module and the wireless transmission module are respectively connected with a data storage module, and the data storage module is connected with the microcontroller.
Preferably, the microcontroller uses chips including a Psoc 3 series chip and a Psoc 5L series chip.
The invention overcomes the defects of the prior art, and provides the ECG monitor, which controls the bandwidth of a passband of ECG detection by detecting the motion state of a human body, eliminates the interference of motion artifacts, can be used not only in a static lying state of the human body, but also in a motion state of the human body, and realizes the whole-day monitoring of the heart under the condition of not influencing the normal life of a user.
Compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects: the invention controls the bandwidth of the passband of the electrocardiographic detection by detecting the human body motion state, eliminates the interference of motion artifacts, can be used not only in the static lying state of the human body, but also in the human body motion state, and realizes the whole-day monitoring of the heart under the condition of not influencing the normal life of a user.
Drawings
Fig. 1 is a schematic structural diagram of the electrocardiograph monitor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A cardiogram monitor, as shown in fig. 1, comprising: a lead electrode 1; the electrocardiosignal preprocessing module 2 is used for carrying out differential amplification on human electrocardiosignals detected by the lead electrode 1, carrying out common-mode suppression on noise of external environment and filtering high-frequency signals; a motion sensor module 3; a tunable band-pass filter 4; the microcontroller 5 is used for reducing the bandwidth of the adjustable band-pass filter 4 to filter motion interference signals when the motion sensor module 3 detects that the amount of human motion is large, and adjusting the bandwidth of the adjustable band-pass filter 4 to enable electrocardiosignals to pass through when the motion sensor module 3 detects that the amount of human motion is small; the electrocardiosignal processing module 6 is used for adjusting the magnitude of the electrocardiosignal; the data processing module 7 is used for storing, transmitting and displaying the electrocardiosignal data and the human motion state data; wherein,
the lead electrode 1 is connected with the input end of the electrocardiosignal preprocessing module 2; the output end of the electrocardiosignal preprocessing module 2 is connected with the input end of the adjustable band-pass filter 4; the output end of the adjustable band-pass filter 4 is connected with the input end of the electrocardiosignal processing module 6; the control end of the adjustable band-pass filter 4 is connected with the microcontroller 5; the output end of the electrocardiosignal processing module 6 is connected with the microcontroller 5; the output end of the motion sensor module 3 is connected with the microcontroller 5; the input end of the data processing module 7 is connected with the microcontroller 5.
In the embodiment of the invention, the lead electrode 1 is arranged on the corresponding part of the human body, is used as a device for connecting the human body and the electrocardiogram monitor, is used as the front-stage input end of the electrocardiosignal, and is used for detecting and acquiring the original electrocardiosignal of the human body. The method comprises the steps that an original electrocardiosignal obtained by a lead electrode 1 is preprocessed by an electrocardiosignal preprocessing module 2, and the preprocessing comprises the steps of carrying out differential amplification on the electrocardiosignal of a human body, carrying out common mode suppression on noise of an external environment and filtering a high-frequency signal; the electrocardiosignal preprocessing module 2 comprises an unadjustable band-pass filter 2-1 for filtering high-frequency interference signals and a differential amplifier 2-2 for inhibiting common-mode signals of environmental noises such as power frequency interference and the like and amplifying electrocardiosignals; the lead electrode 1 is sequentially connected with an unadjustable band-pass filter 2-1 and a differential amplifier 2-2, and the output end of the differential amplifier 2-2 is connected with the input end of an adjustable band-pass filter 4. More specifically, the frequency range of the non-adjustable band-pass filter 2-1 is 0.1Hz to 10kHz, and the chip used by the differential amplifier 2-2 is AD 620.
The preprocessed electrocardiosignals enter an adjustable band-pass filter 4, the adjustable band-pass filter 4 comprises a switched capacitor filter, an active filter and a passive filter, and the bandwidth of a passband is adjustable within 0.1 Hz-10 kHz.
Meanwhile, the motion sensor module 3 is an inertial sensor and is arranged on a corresponding part of a human body, and the motion sensor module 3 detects the amount of motion of the human body in real time, specifically including the amount of motion in a standing state and a motion state. The motion sensor module 3 generates a corresponding signal to the detected amount of motion to transmit to the microcontroller 5, and the motion sensor module 3 and the microcontroller 5 are connected by an I2C bus mode or a UART communication mode. The microcontroller 5 is a Psoc 3 series chip or a Psoc 5L series chip, when the received signal is judged to correspond to a small exercise amount or be static, the bandwidth of the passband of the adjustable bandpass filter 4 is adjusted to enable the electrocardiosignal to pass, and when the received signal is judged to correspond to a large exercise amount, the bandwidth of the passband of the adjustable bandpass filter 4 is reduced to filter out exercise interference signals, and the more active the human body exercise state is, the narrower the bandwidth of the passband of the adjustable bandpass filter 4 is.
The electrocardiosignal processing module 6 receives the electrocardiosignals processed by the adjustable band-pass filter 4 and adjusts the electrocardiosignals. In practical application, the output end of the electrocardiosignal processing module 6 is connected with the input end of the ADC module of the microcontroller 5, and the electrocardio data is generated by the microcontroller 6.
In addition, in the embodiment of the present invention, the data processing module 7 includes a local display module 7-1, a wireless transmission module 7-2, and a data storage module 7-3; the local display module 7-1 and the wireless transmission module 7-2 are respectively connected with the data storage module 7-3, and the data storage module 7-3 is connected with the microcontroller 5. The data storage module 7-3 stores the received electrocardio data and the human motion state data, and the local display module 7-1 is used for displaying the data and transmitting and interacting the data through the wireless transmission module 7-2.
The invention controls the bandwidth of the passband of the electrocardiographic detection by detecting the human body motion state, eliminates the interference of motion artifacts, can be used not only in the static lying state of the human body, but also in the human body motion state, and realizes the whole-day monitoring of the heart under the condition of not influencing the normal life of a user.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.