An electrocardiogram signal acquisition circuit, module, device, system and clothing

Abstract

The present invention relates to the field of electrocardiogram monitoring technology, and discloses an electrocardiogram signal acquisition circuit, module, device, system and clothing, wherein the electrocardiogram signal acquisition circuit comprises an ECG acquisition module, an FM modulation module, an RC coupling circuit and an audio interface; wherein the ECG acquisition module acquires an electrocardiogram signal, modulates the electrocardiogram signal onto an audio carrier through the FM modulation module, couples the modulated electrocardiogram signal to a MIC connection end of the audio interface through the RC coupling circuit, and finally outputs the modulated electrocardiogram signal from the MIC connection end of the audio interface, and the ECG acquisition module and the FM modulation module are provided with a DC power supply by the MIC connection end of the audio interface. Therefore, the present invention can realize the transmission of electrocardiogram signals according to the MIC interface protocol specification, and obtain power through the MIC connection end, thereby saving the power supply part, and the circuit is simple and small in size.

Description

Technical Field

[0001] The present invention relates to the technical field of electrocardiogram monitoring, and in particular to an electrocardiogram signal acquisition circuit, an electrocardiogram acquisition front-end module, a device, a system and clothing. Background Art

[0002] Cardiovascular disease is the biggest threat to human health today. It is characterized by suddenness and malignancy. In addition to diagnosis and treatment in hospitals, its prevention and monitoring in daily life are receiving more and more attention. The collection and recording of ECG data is an effective means of monitoring cardiovascular disease. However, the existing medical ECG monitors are too large and heavy, and have poor portability, making it difficult to collect and record ECG signals in daily life.

[0003] At present, there are portable ECG detection devices based on mobile devices on the market, which mainly collect ECG signals through ECG signal acquisition modules and transmit ECG signals to mobile devices through wired or wireless communication. The mobile devices process the ECG signals to obtain ECG data, thereby realizing the collection and recording of ECG data. However, in actual product design or production, many problems such as reliable ECG signal transmission, equipment power supply, and miniaturization of structure inevitably need to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide an electrocardiogram signal acquisition circuit with simple structure, small size and high reliability.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] An electrocardiogram signal acquisition circuit includes an ECG acquisition module, an FM modulation module, an RC coupling circuit and an audio interface; wherein:

[0007] The ECG acquisition module is used to collect electrocardiogram signals;

[0008] The FM modulation module is used to modulate the electrocardiogram signal onto an audio carrier;

[0009] The RC coupling circuit is used to couple the modulated ECG signal to the MIC connection terminal of the audio interface;

[0010] Moreover, the MIC connection end of the audio interface is used to output the modulated ECG signal and provide a DC power supply for the ECG acquisition module and the FM modulation module.

[0011] According to a specific implementation, in the electrocardiogram signal acquisition circuit of the present invention, the ECG acquisition module includes: a preamplifier module, a bandpass filter module and an amplifier module connected in sequence.

[0012] According to a specific implementation, in the ECG signal acquisition circuit of the present invention, the MIC connection end of the audio interface is connected to a voltage stabilizing module, and the ECG acquisition module and the FM modulation module obtain DC power through the voltage stabilizing module.

[0013] Furthermore, the voltage stabilizing module is a low voltage dropout regulator.

[0014] According to a specific implementation, in the ECG signal acquisition circuit of the present invention, the RC coupling circuit includes a first resistor and a first capacitor; and the modulated ECG signal is coupled to the MIC connection end of the audio interface via the first resistor and the first capacitor in sequence.

[0015] Based on the unified invention, the present invention also provides an ECG acquisition front-end module, which includes an audio connector, a lead wire head and an ECG signal acquisition circuit as invented; wherein the lead wire head is connected to the input end of the ECG acquisition module; and the audio connector is connected to the audio interface.

[0016] According to a specific implementation, in the ECG acquisition front-end module of the present invention, the lead wire head is a single-lead wire head or a multi-lead wire head; the audio connector is an audio socket or an audio plug.

[0017] Based on the unified invention, the present invention further provides a clothing with an electrocardiogram acquisition function, which includes a clothing body and an electrocardiogram acquisition front-end module of the present invention arranged on the clothing body.

[0018] Based on the unified invention, the present invention also provides an electrocardiogram monitoring device, which includes:

[0019] A mobile terminal with an audio interface; and an electrocardiogram acquisition front-end module of the present invention;

[0020] The ECG acquisition front-end module acquires corresponding ECG signals by connecting to each electrode sheet;

[0021] The mobile terminal is connected to the ECG acquisition front-end module via an audio interface, and is used to receive ECG signals, process the ECG signals, obtain corresponding ECG data, and provide a DC power supply for the ECG signal acquisition circuit of the ECG acquisition front-end module.

[0022] Based on the unified invention, the present invention also provides an electrocardiogram monitoring data management system, which includes:

[0023] server;

[0024] and the ECG monitoring device of the present invention used by each user;

[0025] The server is used to receive the ECG data uploaded by each of the ECG monitoring devices and store them in the ECG archive of the corresponding user.

[0026] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0027] The ECG signal acquisition circuit of the present invention comprises an ECG acquisition module, an FM modulation module, an RC coupling circuit and an audio interface; wherein the ECG acquisition module acquires the ECG signal, modulates the ECG signal onto an audio carrier through the FM modulation module, couples the modulated ECG signal to the MIC connection end of the audio interface through the RC coupling circuit, and finally outputs the modulated ECG signal from the MIC connection end of the audio interface, and the ECG acquisition module and the FM modulation module are provided with a DC power supply by the MIC connection end of the audio interface. Therefore, the present invention can realize the transmission of the ECG signal according to the MIC interface protocol specification, and obtain power through the MIC connection end, thereby eliminating the power supply part, and the circuit is simple and small in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The schematic diagram of the structure of the ECG signal acquisition circuit of the present invention is

[0029] Figure 2 It is a circuit connection diagram of the electrocardiogram signal acquisition circuit of the present invention;

[0030] Figure 3 This is a structural schematic diagram of the ECG acquisition front-end module of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the electrocardiogram monitoring device of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the electrocardiogram monitoring data management system of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0034] like Figure 1 As shown, the electrocardiogram signal acquisition circuit of the present invention includes an ECG acquisition module, an FM modulation module, an RC coupling circuit and an audio interface.

[0035] Among them, the ECG acquisition module is used to collect electrocardiogram signals; the FM modulation module is used to modulate the electrocardiogram signals onto an audio carrier; the RC coupling circuit is used to couple the modulated electrocardiogram signals to the MIC connection end of the audio interface; and the MIC connection end of the audio interface is used to output the modulated electrocardiogram signals and provide a DC power supply for the ECG acquisition module and the FM modulation module.

[0036] Specifically, the FM modulation module modulates the processed ECG signal onto an audio carrier through FM. Here, in order to ensure signal bandwidth and anti-interference, a certain frequency point at the high end of the microphone input signal band is usually selected as the carrier, such as 18KHz in the range of 15-20KHz. Moreover, according to the protocol specification of the audio interface of mobile terminals such as smart phones, when receiving a signal through the MIC connection end of the audio interface, a DC voltage is first provided, and then an AC audio signal is received. Therefore, this DC voltage can be used to provide a DC power supply for the ECG acquisition module and the FM modulation module.

[0037] like Figure 2 As shown, in the electrocardiogram signal acquisition circuit of the present invention, the ECG acquisition module includes: a preamplifier module, a bandpass filter module and an amplifier module which are connected in sequence.

[0038] Specifically, since the human body's ECG signal is weak, the preamplifier module must have high impedance and high common-mode interference suppression ratio, and is usually composed of an instrument amplifier. The filter module filters out out-of-band noise according to the characteristics of the ECG signal; the amplifier module amplifies the ECG signal to an appropriate level, and then the FM modulation module modulates the ECG signal to the audio carrier in FM mode. The modulated ECG signal is coupled to the MIC signal line of the audio interface through a capacitive coupling circuit.

[0039] Moreover, in the ECG signal acquisition circuit of the present invention, the MIC connection end of the audio interface is connected to a voltage stabilizing module, and the FM modulation module, the preamplification module, the bandpass filtering module and the amplification module obtain DC power through the voltage stabilizing module.

[0040] During implementation, the voltage stabilizing module is a low voltage difference regulator. Meanwhile, the FM modulation module, preamplifier module, bandpass filter module and amplifier module must be low power consumption. Therefore, the FM modulation module, preamplifier module, bandpass filter module and amplifier module all use integrated circuits.

[0041] In the ECG signal acquisition circuit of the present invention, the RC coupling circuit includes a resistor R2 and a capacitor C2; and the modulated ECG signal is coupled to the MIC connection end of the audio interface via the resistor R2 and the capacitor C2 in sequence.

[0042] Since the ECG signal acquisition circuit of the present invention mostly uses integrated circuits and a small part uses resistors, capacitors and discrete components, the ECG signal acquisition circuit of the present invention is simple and efficient, making the entire circuit structure simple and compact.

[0043] like Figure 3 As shown, the present invention also provides an ECG acquisition front-end module, which includes an audio plug 103, a lead wire head 101 and an ECG signal acquisition circuit 102 of the present invention. The lead wire head 101 is connected to the input end of the ECG acquisition module; the audio plug 103 is connected to the audio interface of the ECG signal acquisition circuit 102.

[0044] In this embodiment, the audio plug 103 is used as an audio connector, and the lead wire head 101 is a single lead wire head. In actual application, an audio socket can also be used as an audio connector, and the lead wire head can be a commonly used ECG detection lead wire head such as a multi-lead lead head.

[0045] In addition, in order to facilitate the use of the ECG acquisition front-end module of the present invention in daily life, the present invention also provides a clothing with ECG acquisition function, which includes a clothing body and the ECG acquisition front-end module of the present invention arranged on the clothing body. Specifically, the clothing body can be a top or a pair of pants. As for the top, if the ECG acquisition front-end module adopts a single-lead wire head, the left hand (LA) and the right hand (RA) can be connected to measure the ECG I lead. If the ECG acquisition front-end module adopts a multi-lead wire head, it can be measured in a multi-lead manner.

[0046] During implementation, corresponding threading channels should be provided on the clothing body to facilitate the arrangement of the lead wire heads.

[0047] like Figure 4 As shown, the present invention also provides an electrocardiogram monitoring device, which includes:

[0048] A mobile terminal 2 with an audio interface; and an electrocardiogram acquisition front-end module of the present invention.

[0049] The two electrode sheets are respectively attached to the left and right wrists of the human body, and the ECG acquisition front-end module is respectively connected to the two electrode sheets through its lead wire head 101 to collect corresponding ECG signals;

[0050] The mobile terminal 2 is connected to the ECG acquisition front-end module through an audio interface to process the ECG signal and obtain corresponding ECG data. Specifically, the audio plug 103 of the ECG acquisition front-end module is inserted into the audio socket of the mobile terminal 2, and the mobile terminal 2 provides a DC power supply for the ECG signal acquisition circuit 102 of the ECG acquisition front-end module.

[0051] In the present invention, the mobile terminal 2 also has a receiving module, a signal demodulation module, a signal processing module, and a display module. The above-mentioned functional modules are the actual hardware of the mobile terminal 2, and need to cooperate with software programs to obtain corresponding ECG data or display corresponding ECG data. These software programs are all based on existing technical principles and are written in a specific language. The language used is related to the operating system platform of the mobile terminal, such as Android or IOS.

[0052] like Figure 5 As shown, the present invention also provides an electrocardiogram monitoring data management system, which includes:

[0053] Server 3;

[0054] And the present invention used by each user such as Figure 4 ECG monitoring equipment shown;

[0055] The server 3 is used to receive the ECG data uploaded by each of the ECG monitoring devices and store them in the ECG archive of the corresponding user.

[0056] Specifically, in the ECG monitoring data management system of the present invention, the server 3 is communicatively connected with the mobile terminal 2 used by each user. At the same time, an ECG archive of each user is established in the server 3. The server 3 saves the ECG data uploaded by the user's mobile terminal 2 in its ECG archive, so that during subsequent physical examinations or hospitalizations, the doctor can access the server 3 through the corresponding networked terminal to obtain the ECG data in the user's ECG archive.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrocardiogram signal acquisition circuit, comprising an ECG acquisition module, characterized in that: It also includes an FM modulation module, an RC coupling circuit and an audio interface; wherein, The ECG acquisition module is used to collect electrocardiogram signals; The FM modulation module is used to modulate the electrocardiogram signal onto an audio carrier; The RC coupling circuit is used to couple the modulated ECG signal to the MIC connection terminal of the audio interface; Moreover, the MIC connection end of the audio interface is used to output the modulated ECG signal and provide a DC power supply for the ECG acquisition module and the FM modulation module, wherein the ECG acquisition module includes: a preamplifier module, a bandpass filter module and an amplifier module connected in sequence; Wherein, the RC coupling circuit includes a resistor and a capacitor; and the modulated electrocardiogram signal is coupled to the MIC connection end of the audio interface via the resistor and the capacitor in sequence.

2. The ECG signal acquisition circuit according to claim 1, characterized in that: The MIC connection end of the audio interface is connected to a voltage stabilizing module, and the ECG acquisition module and the FM modulation module obtain direct current power through the voltage stabilizing module.

3. The ECG signal acquisition circuit according to claim 2, characterized in that: The voltage stabilizing module is a low voltage dropout regulator.

4. An electrocardiogram acquisition front-end module, characterized in that; It comprises an audio connector, a lead wire head and an ECG signal acquisition circuit as described in any one of claims 1 to 3; wherein the lead wire head is connected to the input end of the ECG acquisition module; and the audio connector is connected to the audio interface.

5. The ECG acquisition front-end module according to claim 4, characterized in that: The lead wire head is a single lead wire head or a multi-lead wire head; the audio connector is an audio socket or an audio plug.

6. A garment with electrocardiogram collection function, characterized in that: It comprises a clothing body, and an electrocardiogram acquisition front-end module as claimed in claim 4 or 5, which is arranged on the clothing body.

7. An electrocardiogram monitoring device, characterized in that: include: A mobile terminal with an audio interface; And, the ECG acquisition front-end module as claimed in claim 4 or 5; The ECG acquisition front-end module acquires corresponding ECG signals by connecting to each electrode sheet; The mobile terminal is connected to the ECG acquisition front-end module via an audio interface, and is used to receive ECG signals, process the ECG signals, obtain corresponding ECG data, and provide a DC power supply for the ECG signal acquisition circuit of the ECG acquisition front-end module.

8. An electrocardiogram monitoring data management system, characterized in that: include: server; and an electrocardiogram monitoring device as claimed in claim 7 used by each user; The server is used to receive the ECG data uploaded by each of the ECG monitoring devices and store them in the ECG archive of the corresponding user.

Images