Heart rate measuring circuit, chip, module and skipping rope

Abstract

The utility model relates to the technical field of electronic measurement, in particular to a heart rate measuring circuit, a chip, a module and a skipping rope. The heart rate measuring circuit comprises a sinusoidal signal generating circuit, a high-pass circuit, an amplifying circuit, a rectifying circuit, an ADC conversion circuit and a microprocessor. In the heart rate measurement process of the heart rate measurement circuit, the human body is excited through the integrated excitation structure, the human body measurement voltage is obtained through the measurement structure, then the heart rate of the human body is obtained through processing and operation of the heart rate measurement circuit, and only the integrated excitation structure and measurement structure need to make contact with the human body, so that the heart rate of the human body is obtained. The excitation position of the human body and the measurement position of the voltage of the human body are integrated together, the heart rate of the human body is obtained in cooperation with the heart rate measurement circuit, and the heart rate of the human body is measured in one area.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic measurement, and in particular to a heart rate measurement circuit, a chip, a module and a skipping rope. Background Art

[0002] In recent years, with the improvement of health awareness, heart rate monitoring has become a common health management method in daily life. The traditional ECG measurement method is to use metal electrodes as sensors to capture ECG signals and then calculate heart rate. In this process, the metal electrodes need to be in close contact with both hands to capture electrical signals. However, the measurement of ECG signals can only be obtained through the participation of both hands. This makes this heart rate measurement method of using both hands to obtain ECG signals impractical or inconvenient in some situations. For example, when exercising, both hands may be busy performing actions and cannot maintain stable contact with the electrodes. In daily life, the measurement method of both hands may interfere with daily life. Therefore, the traditional method of measuring heart rate, which must use both hands, cannot meet people's needs and is not easy to promote. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a heart rate measurement circuit, a chip, a module and a skipping rope.

[0004] To achieve the above object, the utility model provides a heart rate measurement circuit, comprising:

[0005] Sine signal generating circuit, high-pass circuit, amplifier circuit, rectifier circuit, ADC conversion circuit, microprocessor;

[0006] The sinusoidal signal generating circuit is connected to the microprocessor, the high-pass circuit is connected to the amplifier circuit; the amplifier circuit is connected to the rectifier circuit, the rectifier circuit is connected to the ADC conversion circuit, and the ADC conversion circuit is connected to the microprocessor;

[0007] The sinusoidal signal generating circuit is connected to the excitation structure; the sinusoidal signal generating circuit generates a sinusoidal current signal, and the sinusoidal current signal is output to the human body through the excitation structure to excite the human body;

[0008] The high-pass circuit is connected to the measurement structure; the high-pass circuit obtains the human body measurement voltage through the measurement structure, processes the human body measurement voltage to obtain the AC component in the human body measurement voltage, and outputs the AC component to the amplification circuit;

[0009] The AC component is processed and calculated in real time through the amplifier circuit, the rectifier circuit, the ADC conversion circuit, and the microprocessor in sequence to obtain the corresponding human body impedance value, and the human body impedance value is used for heart rate value calculation to obtain a continuous heart rate, wherein the excitation structure and the measurement structure are integrated into one.

[0010] Optionally, the amplifier circuit obtains an AC component in the human body measurement voltage output by the high-pass circuit, amplifies the AC component, obtains an amplified AC voltage signal, and outputs the amplified AC voltage signal to the rectifier circuit;

[0011] The rectifier circuit obtains the amplified AC voltage signal output by the amplifier circuit, rectifies the amplified AC voltage signal, obtains a corresponding DC voltage signal and outputs the DC voltage signal to the ADC conversion circuit;

[0012] The ADC conversion circuit obtains the DC voltage signal output by the rectifier circuit, converts the DC voltage signal into a digital signal, obtains a human body voltage value, and outputs the human body voltage value to the microprocessor;

[0013] The microprocessor obtains the human body voltage value output by the ADC conversion circuit and the sinusoidal current signal generated by the sinusoidal signal generating circuit, performs impedance value calculation on the human body voltage value and the sinusoidal current signal in real time, and correspondingly obtains the human body impedance value in real time, and performs heart rate value calculation on the human body impedance value to obtain a continuous heart rate.

[0014] Optionally, the impedance value calculation of the microprocessor is: dividing the human body voltage value by the sinusoidal current signal to obtain the human body impedance value.

[0015] Optionally, the heart rate value calculation of the microprocessor is: obtaining the human heart rate according to the relationship between the cycle of the change of the human body impedance value and the cycle of the heart beating.

[0016] Optionally, the frequency range of the sinusoidal current signal is 10K to 500K, and the amplitude range of the sinusoidal current signal is 100uA to 1mA.

[0017] The utility model also provides a heart rate measurement chip, comprising the above-mentioned heart rate measurement circuit.

[0018] The utility model also provides a heart rate measurement module, comprising an excitation structure, a measurement structure and the above-mentioned heart rate measurement chip, wherein the excitation structure is connected to a sinusoidal signal generating circuit of the heart rate measurement chip, and the measurement structure is connected to a high-pass circuit of the heart rate measurement chip;

[0019] The excitation structure receives the sinusoidal current signal generated by the sinusoidal signal generating circuit, outputs the sinusoidal current signal to the human body and excites the human body;

[0020] The measuring structure measures a human body measurement voltage and outputs the human body measurement voltage to the high-pass circuit, wherein the excitation structure and the measuring structure are integrated into one body and both are in contact with the human body.

[0021] Optionally, the excitation structure includes a first electrode group and a second electrode group, and the measurement structure includes a third electrode group and a fourth electrode group; the human body is stimulated by the first electrode group and the second electrode group, and the voltage of the human body is measured using the third electrode group and the fourth electrode group, wherein the first electrode group, the second electrode group, the third electrode group, and the fourth electrode group each include at least one metal electrode.

[0022] Optionally, the positions where the excitation structure and the measurement structure contact the human body include: a wrist or a palm of a human body.

[0023] The utility model also provides a skipping rope, comprising a handle and the above-mentioned heart rate measurement module, wherein the excitation structure and the measurement structure of the heart rate measurement module are arranged on the surface of the handle of the skipping rope and are located at the palm-clenched position, and the heart rate measurement chip of the heart rate measurement module is arranged inside the handle of the skipping rope.

[0024] In summary, the advantages and beneficial effects of the utility model are:

[0025] The utility model provides a heart rate measurement circuit, chip, module and skipping rope. The heart rate measurement circuit includes: a sinusoidal signal generating circuit, a high-pass circuit, an amplifier circuit, a rectifier circuit, an ADC conversion circuit and a microprocessor. The sinusoidal current signal generated by the sinusoidal signal generating circuit is used to excite the human body through an excitation structure, and the high-pass circuit obtains a human body measurement voltage through a measurement structure. The obtained human body measurement voltage is then processed and calculated by the amplifier circuit, the rectifier circuit, the ADC conversion circuit and the microprocessor to obtain the impedance value of the human body, and then the heart rate of the human body is finally obtained according to the relationship between the impedance value of the human body and the heartbeat. In the process of measuring heart rate using the heart rate measurement circuit, the heart rate measurement circuit excites the human body through the integrated excitation structure, and the measurement structure obtains the human body measurement voltage, and then the human body's heart rate can be measured through processing and calculation by the heart rate measurement circuit. Therefore, it is only necessary to make the integrated excitation structure and measurement structure contact the human body, so that the excitation position of the human body and the measurement position of the human body voltage are integrated together, and then the human body's heart rate can be obtained in conjunction with the heart rate measurement circuit, and the human body's heart rate can be measured in an area, which is convenient for the human body to measure the heart rate with one hand or one arm during exercise or daily life, and does not affect the execution of actions by both hands during exercise, nor does it interfere with daily life. In addition, using the excitation structure and the measurement structure as sensors to measure heart rate is low in cost and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a heart rate measurement circuit in an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the relationship between human body impedance and heart beats in a heart rate measurement circuit in an embodiment of the present utility model;

[0028] Figure 3 It is a schematic diagram of a handle of a skipping rope in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific implementation methods of the utility model and the corresponding drawings. Obviously, the described implementation methods are only part of the implementation methods of the utility model, not all of the implementation methods. Based on the implementation methods in the utility model, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] A heart rate measurement circuit, comprising:

[0032] Sine signal generating circuit 10, high-pass circuit 20, amplifier circuit 30, rectifier circuit 40, ADC conversion circuit 50, microprocessor 60;

[0033] The sinusoidal signal generating circuit 10 is connected to the microprocessor 60, the high-pass circuit 20 is connected to the amplifier circuit 30; the amplifier circuit 30 is connected to the rectifier circuit 40, the rectifier circuit 40 is connected to the ADC conversion circuit 50, and the ADC conversion circuit 50 is connected to the microprocessor 60;

[0034] The sinusoidal signal generating circuit 10 is connected to the excitation structure 101; the sinusoidal signal generating circuit 10 generates a sinusoidal current signal, and the sinusoidal current signal is output to the human body through the excitation structure 101 to excite the human body;

[0035] The high-pass circuit 20 is connected to the measurement structure 102; the high-pass circuit 20 obtains the human body measurement voltage through the measurement structure 102, processes the human body measurement voltage to obtain the AC component in the human body measurement voltage, and outputs the AC component to the amplifier circuit 30;

[0036] The AC component is processed and calculated in real time through the amplifier circuit 30, the rectifier circuit 40, the ADC conversion circuit 50, and the microprocessor 60 in sequence to obtain the corresponding human body impedance value, and the human body impedance value is calculated as a heart rate value to obtain a continuous heart rate, wherein the excitation structure 101 and the measurement structure 102 are integrated into one.

[0037] Specifically, the frequency range of the sinusoidal current signal is 10K to 500K, and the amplitude range of the sinusoidal current signal is 100uA to 1mA.

[0038] In this embodiment, the frequency of the sinusoidal current signal is 50 kHz, and the amplitude of the sinusoidal current signal is 100 uArms.

[0039] In this embodiment, during the process of processing the obtained human body measurement voltage, the high-pass circuit 20 filters out the DC component in the human body measurement voltage and retains the AC component in the human body measurement voltage.

[0040] In this embodiment, the amplifier circuit obtains the AC component in the human body measurement voltage output by the high-pass circuit, amplifies the AC component, obtains an amplified AC voltage signal, and outputs the amplified AC voltage signal to the rectifier circuit.

[0041] The AC voltage signal is obtained by measuring the measurement structure 102. The measurement structure 102 measures the human body voltage through the two electrode groups it contains to obtain the human body measurement voltage. Since the two electrodes included in the measurement structure 102 are integrated together to facilitate simultaneous contact with the human body in a relatively small range, such as a human palm, the signal strength of the human body measurement voltage obtained will be weak and will not meet the requirements of subsequent processing and calculation. The AC voltage signal is amplified by the amplifier circuit to facilitate subsequent processing and calculation of the signal by the heart rate measurement circuit. The amplification of the AC voltage signal is determined based on actual conditions.

[0042] In this embodiment, the rectifier circuit obtains the amplified AC voltage signal output by the amplifier circuit, rectifies the amplified AC voltage signal, obtains a corresponding DC voltage signal, and outputs the DC voltage signal to the ADC conversion circuit.

[0043] The rectifier circuit 40 rectifies the amplified AC voltage signal into a corresponding DC voltage signal, so as to facilitate the ADC conversion circuit 50 to convert the analog voltage into a digital signal and subsequent processing or calculation.

[0044] In this embodiment, the ADC conversion circuit obtains the DC voltage signal output by the rectifier circuit, converts the DC voltage signal into a digital signal, obtains a human body voltage value, and outputs the human body voltage value to the microprocessor.

[0045] Since the DC voltage signal is an analog signal, the ADC conversion circuit 50 is used to convert the analog signal into a digital signal, that is, to convert the DC voltage signal into a numerical value of human body voltage.

[0046] In this embodiment, the microprocessor obtains the human body voltage value output by the ADC conversion circuit and the sinusoidal current signal generated by the sinusoidal signal generating circuit, and performs impedance value calculation on the human body voltage value and the sinusoidal current signal in real time. Correspondingly, the human body impedance value is obtained in real time, and the human body impedance value is calculated as a heart rate value to obtain a continuous heart rate.

[0047] In this embodiment, the impedance value calculation of the microprocessor 60 is to divide the human body voltage value by the sinusoidal current signal according to Ohm's law to obtain the human body impedance value.

[0048] In this embodiment, the heart rate value of the microprocessor 60 is calculated based on the relationship between the cycle of the human body impedance value change and the cycle of the heart beat, such as Figure 2 As shown, the heart rate of the human body is obtained.

[0049] In the process of measuring heart rate using the heart rate measurement circuit, the heart rate measurement circuit excites the human body through the integrated excitation structure 101, and the measurement structure 102 obtains the human body measurement voltage to measure the human body's heart rate, thereby realizing single-handed measurement of the human body's heart rate, which is convenient for the human body to measure the heart rate with one hand during exercise or daily life, and does not affect the execution of both hands during exercise, nor does it interfere with daily life. In addition, the excitation structure 101 and the measurement structure 102 are used as sensors to measure heart rate, which is low-cost and easy to promote.

[0050] In this embodiment, the human body measurement voltage between the two electrode groups is obtained through the two electrode groups in the measurement structure 102, and the human body impedance value between the two electrode groups is obtained after processing and calculation by the heart rate measurement circuit, and the human body impedance value is calculated for the heart rate value, that is, the human body heart rate is obtained according to the relationship between the cycle of the human body impedance value change and the heart beat cycle;

[0051] The traditional ECG measurement method using the human body's ECG signals is to pick up bioelectric signals at specific points on the human body surface. The specific points on the human body surface (such as both hands) are in contact with metal electrode sheets to capture the electrical signals. Therefore, the heart rate measurement circuit provided in this embodiment avoids the impracticality or inconvenience brought about by the traditional heart rate measurement method of using both hands to obtain ECG signals, thereby meeting people's needs.

[0052] At the same time, the measurement structure 102 measures the human body voltage through the two electrode groups it contains. Since the two electrodes are integrated together, they are convenient for contacting the human body at the same time in a relatively small range, such as a human palm, resulting in a weak signal strength of the human body measurement voltage. The human body measurement voltage obtained between the two electrode groups is amplified by the amplifier circuit, which facilitates the subsequent processing and calculation of the signal by the heart rate measurement circuit, thereby obtaining the human body's heart rate.

[0053] The utility model also provides a heart rate measurement chip, comprising the above-mentioned heart rate measurement circuit.

[0054] The utility model also provides a heart rate measurement module, comprising an excitation structure, a measurement structure and the above-mentioned heart rate measurement chip, wherein the excitation structure is connected to a sinusoidal signal generating circuit of the heart rate measurement chip, and the measurement structure is connected to a high-pass circuit of the heart rate measurement chip;

[0055] The excitation structure receives the sinusoidal current signal generated by the sinusoidal signal generating circuit, outputs the sinusoidal current signal to the human body and excites the human body;

[0056] The measuring structure measures a human body measurement voltage and outputs the human body measurement voltage to the high-pass circuit, wherein the excitation structure and the measuring structure are integrated into one body and both are in contact with the human body.

[0057] In this embodiment, the excitation structure includes a first electrode group and a second electrode group; the measurement structure includes a third electrode group and a fourth electrode group; the human body is excited by the first electrode group and the second electrode group, and the voltage of the human body is measured using the third electrode group and the fourth electrode group, wherein the first electrode group, the second electrode group, the third electrode group, and the fourth electrode group each include at least one metal electrode.

[0058] In this embodiment, the first electrode group, the second electrode group, the third electrode group, and the fourth electrode group each include one electrode.

[0059] In other embodiments, the first electrode group, the second electrode group, the third electrode group, and the fourth electrode group all include a plurality of electrodes, and the number of electrodes is determined according to actual needs.

[0060] In this embodiment, the positions where the excitation structure and the measurement structure contact the human body include: the human wrist or the human palm.

[0061] The utility model also provides a skipping rope, comprising a handle and the above-mentioned heart rate measurement module, wherein the excitation structure and the measurement structure of the heart rate measurement module are arranged on the surface of the handle of the skipping rope and are located at the palm-clenched position, and the heart rate measurement chip of the heart rate measurement module is arranged inside the handle of the skipping rope.

[0062] In this embodiment, if Figure 3As shown, in order to facilitate heart rate measurement, the heart rate measurement chip is set in the left hand handle of the skipping rope. When a person holds the handle tightly for rope skipping, the palm of the left hand contacts the excitation structure (the first electrode group 110, the second electrode group 120) and the measurement structure (i.e., the third electrode group 130, the fourth electrode group 140) of the heart rate measurement module, and the heart rate measurement chip outputs a sinusoidal current signal to the excitation structure to excite the palm of the left hand, and the measurement structure measures and obtains the left palm measurement voltage. The heart rate measurement chip obtains the left palm measurement voltage through the measurement structure, and then obtains the impedance value of the left palm through processing and calculation by the heart rate measurement chip, and then obtains the heart rate of the human body. Therefore, it is only necessary to contact the left palm with the integrated excitation structure and measurement structure, so that the excitation of the left palm and the measurement of the left palm voltage are integrated together, and then the heart rate of the human body can be obtained in conjunction with the heart rate measurement chip, and the speed and amount of rope skipping can be adjusted in time according to the obtained heart rate of the human body, so as to achieve the purpose of healthy exercise.

[0063] Finally, it should be noted that any modification or equivalent replacement of part or all of the technical features based on the device structure of the utility model and the technical solution of the described embodiment, which does not deviate from the essence of the corresponding technical solution of the utility model, belongs to the patent scope of the device structure of the utility model and the described implementation scheme.

Claims

1. A heart rate measurement circuit, characterized in that: include: Sine signal generating circuit, high-pass circuit, amplifier circuit, rectifier circuit, ADC conversion circuit, microprocessor; The sinusoidal signal generating circuit is connected to the microprocessor, the high-pass circuit is connected to the amplifier circuit; the amplifier circuit is connected to the rectifier circuit, the rectifier circuit is connected to the ADC conversion circuit, and the ADC conversion circuit is connected to the microprocessor; The sinusoidal signal generating circuit is connected to the excitation structure; the sinusoidal signal generating circuit generates a sinusoidal current signal, and the sinusoidal current signal is output to the human body through the excitation structure to excite the human body; The high-pass circuit is connected to the measurement structure; the high-pass circuit obtains the human body measurement voltage through the measurement structure, processes the human body measurement voltage to obtain the AC component in the human body measurement voltage, and outputs the AC component to the amplification circuit; The AC component is processed and calculated in real time through the amplifier circuit, the rectifier circuit, the ADC conversion circuit, and the microprocessor in sequence to obtain the corresponding human body impedance value, and the human body impedance value is used for heart rate value calculation to obtain a continuous heart rate, wherein the excitation structure and the measurement structure are integrated into one.

2. A heart rate measurement circuit as claimed in claim 1, characterized in that: The amplifier circuit obtains the AC component in the human body measurement voltage output by the high-pass circuit, amplifies the AC component, obtains an amplified AC voltage signal, and outputs the amplified AC voltage signal to the rectifier circuit; The rectifier circuit obtains the amplified AC voltage signal output by the amplifier circuit, rectifies the amplified AC voltage signal, obtains a corresponding DC voltage signal and outputs the DC voltage signal to the ADC conversion circuit; The ADC conversion circuit obtains the DC voltage signal output by the rectifier circuit, converts the DC voltage signal into a digital signal, obtains a human body voltage value, and outputs the human body voltage value to the microprocessor; The microprocessor obtains the human body voltage value output by the ADC conversion circuit and the sinusoidal current signal generated by the sinusoidal signal generating circuit, performs impedance value calculation on the human body voltage value and the sinusoidal current signal in real time, and correspondingly obtains the human body impedance value in real time, and performs heart rate value calculation on the human body impedance value to obtain a continuous heart rate.

3. A heart rate measurement circuit as claimed in claim 2, characterized in that: The impedance value calculation of the microprocessor is: dividing the human body voltage value by the sinusoidal current signal to obtain the human body impedance value.

4. A heart rate measurement circuit as claimed in claim 2, characterized in that: The heart rate value calculation of the microprocessor is as follows: the heart rate of the human body is obtained according to the relationship between the cycle of the change of the human body impedance value and the cycle of the heart beat.

5. A heart rate measurement circuit as claimed in claim 1, characterized in that: The frequency range of the sinusoidal current signal is 10K-500K, and the amplitude range of the sinusoidal current signal is 100uA-1mA.

6. A heart rate measurement chip, characterized in that: The invention comprises a heart rate measurement circuit as claimed in any one of claims 1 to 5.

7. A heart rate measurement module, characterized in that: It comprises an excitation structure, a measurement structure and a heart rate measurement chip as claimed in claim 6, wherein the excitation structure is connected to a sinusoidal signal generating circuit of the heart rate measurement chip, and the measurement structure is connected to a high-pass circuit of the heart rate measurement chip; The excitation structure receives the sinusoidal current signal generated by the sinusoidal signal generating circuit, outputs the sinusoidal current signal to the human body and excites the human body; The measuring structure measures a human body measurement voltage and outputs the human body measurement voltage to the high-pass circuit, wherein the excitation structure and the measuring structure are integrated into one body and both are in contact with the human body.

8. A heart rate measurement module as claimed in claim 7, characterized in that: The excitation structure includes a first electrode group and a second electrode group, and the measurement structure includes a third electrode group and a fourth electrode group; the human body is excited by the first electrode group and the second electrode group, and the voltage of the human body is measured using the third electrode group and the fourth electrode group, wherein the first electrode group, the second electrode group, the third electrode group, and the fourth electrode group each include at least one metal electrode.

9. A heart rate measurement module as claimed in claim 7, characterized in that: The positions where the excitation structure and the measurement structure contact the human body include: the human wrist or the human palm.

10. A skipping rope, characterized in that: It comprises a handle and a heart rate measurement module as claimed in claim 7, wherein the excitation structure and the measurement structure of the heart rate measurement module are arranged on the surface of the handle of the skipping rope and are located at the palm clenching position, and the heart rate measurement chip of the heart rate measurement module is arranged inside the handle of the skipping rope.

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