CN210055998U - Body state monitoring circuit and electronic equipment - Google Patents
Body state monitoring circuit and electronic equipment Download PDFInfo
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- CN210055998U CN210055998U CN201920641815.6U CN201920641815U CN210055998U CN 210055998 U CN210055998 U CN 210055998U CN 201920641815 U CN201920641815 U CN 201920641815U CN 210055998 U CN210055998 U CN 210055998U
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Abstract
The utility model discloses a body state monitoring circuit and an electronic device, which comprises a flow velocity acquisition circuit, a signal amplification circuit and a singlechip processing circuit; the flow rate acquisition circuit is used for acquiring the flow rate of the finger blood; the signal amplification circuit is used for amplifying the finger blood flow rate and outputting an amplified signal; and the singlechip processing circuit is used for processing the amplified signal and outputting a heart rate value. It can be seen that, the utility model provides a velocity of flow acquisition circuit will gather earlier and point the blood velocity of flow, amplify the pulse signal of this finger blood velocity of flow by signal amplification circuit again to final output heart rate value. The heart rate value measured in this way has lower error, and moreover, as only the blood flow velocity at the finger is needed to be obtained, the use is more convenient, and the monitoring efficiency is greatly improved. Therefore, it can be considered that the technical problem that the heart rate cannot be efficiently monitored is solved.
Description
Technical Field
The utility model relates to an integrated circuit technical field, in particular to health status monitoring circuit and electronic equipment.
Background
In order to better understand the physical condition of the human body, people often configure some simple medical devices at home.
In terms of heart rate measurement, heart rate refers to the number of heart beats per unit time, usually one minute, and is an important index for monitoring whether the physical condition of a human body is normal. However, the heart rate measuring devices that are commonly available at home tend to have large measurement errors and are inconvenient to use, for example, a medical stethoscope is used only near the heart and the time measured is long.
It is seen that heart rate cannot be monitored efficiently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a health status monitoring circuit aims at solving the technical problem of unable high-efficient ground monitoring rhythm of the heart.
In order to achieve the above object, the present invention provides a body state monitoring circuit, which comprises a flow rate acquisition circuit, a signal amplification circuit and a single chip processing circuit; the flow rate acquisition circuit is connected with the signal amplification circuit, and the signal amplification circuit is connected with the single chip microcomputer processing circuit; wherein the content of the first and second substances,
the flow rate acquisition circuit is used for acquiring the flow rate of finger blood;
the signal amplification circuit is used for amplifying the finger blood flow speed and outputting an amplified signal;
and the singlechip processing circuit is used for processing the amplified signal and outputting a heart rate value.
Preferably, the body state monitoring circuit further comprises a body temperature acquisition circuit, and the body temperature acquisition circuit is connected with the single chip microcomputer processing circuit.
Preferably, the flow rate acquisition circuit comprises a first power supply, a first resistor, a second resistor, a third resistor, an infrared transmitting tube, an infrared receiving tube and a first capacitor;
the first power supply is respectively connected with the first end of the first resistor and the first end of the second resistor;
the second end of the first resistor is connected with the first end of the infrared emission tube;
the second end of the second resistor is respectively connected with the first end of the infrared receiving tube and the first end of the first capacitor, and the second end of the first capacitor is respectively connected with the first end of the third resistor and the signal amplifying circuit;
and the second end of the infrared transmitting tube is respectively connected with the second end of the infrared receiving tube and the second end of the third resistor, and the second end of the third resistor is grounded.
Preferably, the signal amplification circuit comprises a first operational amplifier, an adjustable potentiometer, a second capacitor, a third capacitor and a fourth resistor;
the flow rate acquisition circuit is connected with the positive input end of the first operational amplifier;
the first end of the adjustable potentiometer is grounded, the sliding end of the adjustable potentiometer is connected with the negative input end of the first operational amplifier, and the second end of the adjustable potentiometer is respectively connected with the first end of the second capacitor and the first end of the fourth resistor;
the output end of the first operational amplifier is respectively connected with the second end of the second capacitor, the second end of the fourth resistor and the first end of the third capacitor, and the second end of the third capacitor is connected with the single chip microcomputer processing circuit.
Preferably, the body condition monitoring circuit further comprises a signal shaping circuit; the signal amplifying circuit is connected with the signal shaping circuit, and the signal shaping circuit is connected with the single chip microcomputer processing circuit.
Preferably, the signal shaping circuit comprises a second operational amplifier, a fifth resistor, a sixth resistor and a second power supply;
the signal amplification circuit is connected with the positive input end of the second operational amplifier;
a first end of the fifth resistor is grounded, a second end of the fifth resistor is respectively connected with a first end of the sixth resistor and a negative input end of the second operational amplifier, and a second end of the sixth resistor is connected with the second power supply;
and the output end of the second operational amplifier is connected with the singlechip processing circuit.
Preferably, the signal shaping circuit further comprises a light emitting diode and a seventh resistor;
the output end of the second operational amplifier is connected with the first end of the light-emitting diode, the second end of the light-emitting diode is connected with the first end of the seventh resistor, and the second end of the seventh resistor is grounded.
Preferably, the body state monitoring circuit further comprises a key circuit, wherein the key circuit comprises a first key, a second key and a third key;
the first key end of the single chip microcomputer processing circuit is connected with the first end of the first key, the second key end of the single chip microcomputer processing circuit is connected with the first end of the second key, and the third key end of the single chip microcomputer processing circuit is connected with the first end of the third key;
the second end of the first key is connected with the second end of the second key and the second end of the third key respectively, and the second end of the third key is grounded.
Preferably, the body state monitoring circuit further comprises a buzzer alarm circuit, wherein the buzzer alarm circuit comprises an eighth resistor, a triode, a buzzer and a third power supply;
the single chip microcomputer processing circuit is connected with the first end of the eighth resistor, the second end of the eighth resistor is connected with the base electrode of the triode, the collector electrode of the triode is grounded, the emitting electrode of the triode is connected with the first end of the buzzer, and the second end of the buzzer is connected with the third power supply.
The utility model also provides an electronic equipment, electronic equipment includes as above health status monitoring circuit.
The utility model discloses in monitor health state through setting up velocity of flow acquisition circuit, signal amplification circuit and singlechip processing circuit, particularly, the velocity of flow acquisition circuit will gather earlier and point the blood velocity of flow, amplify the pulse signal of this finger blood velocity of flow by signal amplification circuit again to final output heart rate value. The heart rate value measured in this way has lower error, and moreover, as only the blood flow velocity at the finger is needed to be obtained, the use is more convenient, and the monitoring efficiency is greatly improved. Therefore, it can be considered that the technical problem that the heart rate cannot be efficiently monitored is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of the body condition monitoring circuit of the present invention;
fig. 2 is a schematic diagram of a circuit structure of an embodiment of the body condition monitoring circuit of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a health state monitoring circuit, wherein, figure 1 is the utility model discloses the functional module diagram of a health state monitoring circuit embodiment, figure 2 is the circuit structure schematic diagram of a health state monitoring circuit embodiment.
Please refer to fig. 1 to 2 in detail, which includes a flow rate collecting circuit 100, a signal amplifying circuit 200 and a single chip processing circuit 300; the flow rate acquisition circuit 100 is connected with the signal amplification circuit 200, and the signal amplification circuit 200 is connected with the single chip microcomputer processing circuit 300; wherein the content of the first and second substances,
the flow rate acquisition circuit 100 is used for acquiring the flow rate of finger blood;
the signal amplification circuit 200 is used for amplifying the finger blood flow speed and outputting an amplified signal;
the single chip microcomputer processing circuit 300 is used for processing the amplified signal and outputting a heart rate value.
It will be appreciated that, given that the flow velocity of blood in a blood vessel has a correlation with the number of heart beats, the heart rate value can be finally obtained by obtaining the flow velocity of blood first, and thus the error of the obtained heart rate value is smaller.
Specifically, the flow rate of the blood flowing in the finger may be collected first, and considering that the flow rate of the blood in the finger collected by the flow rate collection circuit 100 will be represented as a pulse signal, which is often a very weak signal, the pulse signal may be amplified by the signal amplification circuit 200; in view of the fact that the frequency of the collected pulse signals is in direct proportion to the heart rate of the human body per minute, the single chip microcomputer processing circuit 300 converts the amplified pulse signals into heart rate values.
It should be understood that the technical solution provided by this embodiment will obtain the heart rate value through the finger blood flow rate, thus greatly simplifying the measurement process, and the user only needs to stretch out the finger, which is very convenient to use.
In this embodiment, the body state is monitored by arranging the flow rate collecting circuit 100, the signal amplifying circuit 200 and the single chip processing circuit 300, specifically, the flow rate collecting circuit 100 collects the flow rate of the finger blood first, then the signal amplifying circuit 200 amplifies the pulse signal of the flow rate of the finger blood, and finally outputs the heart rate value. The heart rate value measured in this way has lower error, and moreover, as only the blood flow velocity at the finger is needed to be obtained, the use is more convenient, and the monitoring efficiency is greatly improved. Therefore, it can be considered that the technical problem that the heart rate cannot be efficiently monitored is solved.
Further, the body state monitoring circuit further comprises a body temperature acquisition circuit, and the body temperature acquisition circuit is connected with the single chip microcomputer processing circuit 300.
It can be understood that the mercury thermometer has many defects in measuring temperature, such as certain error in reading data, inaccurate reading, relatively long measuring time, and certain danger. Thus, in addition to the heart rate, a measurement of temperature may be introduced. The body temperature acquisition circuit is used for acquiring body temperature signals; and the singlechip processing circuit 300 is used for processing the body temperature signal and outputting a body temperature value.
Specifically, the body temperature acquisition circuit can include a temperature sensor, the type of the temperature sensor can be DS18B20, and a human body can make DS18B20 acquire a body temperature signal by directly contacting DS18B 20. DS18B20 can convert the body temperature signal into a digital signal that singlechip processing circuit 300 can recognize. Also, DS18B20 may measure in the range of-55 degrees to +125 degrees.
Further, the flow rate collecting circuit 100 includes a first power VCC1, a first resistor R1, a second resistor R2, a third resistor R3, an infrared transmitting tube, an infrared receiving tube, and a first capacitor C1;
the first power source VCC1 is respectively connected with a first end of the first resistor R1 and a first end of the second resistor R2;
the second end of the first resistor R1 is connected with the first end of the infrared emission tube;
a second end of the second resistor R2 is connected to a first end of the infrared receiving tube and a first end of the first capacitor C1, respectively, and a second end of the first capacitor C1 is connected to a first end of the third resistor R3 and the signal amplifying circuit 200, respectively;
the second end of the infrared transmitting tube is respectively connected with the second end of the infrared receiving tube and the second end of the third resistor R3, and the second end of the third resistor R3 is grounded.
It should be understood that, in the case of the finger blood flow rate acquisition operation, the pulse signal of the finger blood flow rate is acquired through the infrared transmitting tube and the infrared receiving tube. In essence, the infrared transmitting tube and the infrared receiving tube herein constitute one infrared sensor. Specifically, the infrared transmitting tube will emit an infrared light signal, and the infrared light signal transmitted through the finger will be acquired by the infrared receiving tube.
In a specific implementation, considering that the working voltage of the infrared emission tube is less than 5V, 1 divider resistor can be additionally connected in series. The smaller the resistance value of the divider resistor is, the larger the emitted infrared light signal is; however, if the voltage-dividing resistance is too small, the infrared emission tube is easily burned out. The resistance value of the first resistor R1 is 220 Ω.
In addition, since the pulse signal output by the infrared sensor is a very weak signal, and has a very low frequency and is accompanied by various noise interferences, the third resistor R3 and the first capacitor C1 may be additionally provided for low-pass filtering to remove the high-frequency interferences. Of course, when the infrared sensor is strongly interfered, the dc voltage signal at the output end of the infrared sensor will be greatly changed. The resistance of the second resistor R2 is 20k Ω, the resistance of the third resistor R3 is 68k Ω, and the capacitance of the first capacitor C1 is 1 uF.
Further, the signal amplification circuit 200 includes a first operational amplifier U1, an adjustable potentiometer AR, a second capacitor C2, a third capacitor C3, and a fourth resistor R4;
the flow rate acquisition circuit 100 is connected with a positive input end of the first operational amplifier U1;
a first end of the adjustable potentiometer AR is grounded, a sliding end of the adjustable potentiometer AR is connected with a negative input end of the first operational amplifier U1, and a second end of the adjustable potentiometer AR is connected with a first end of the second capacitor C2 and a first end of the fourth resistor R4 respectively;
the output end of the first operational amplifier U1 is connected to the second end of the second capacitor C2, the second end of the fourth resistor R4 and the first end of the third capacitor C3, respectively, and the second end of the third capacitor C3 is connected to the mcu processing circuit 300.
In a specific implementation, for the signal amplifying circuit 200, the second capacitor C2 and the fourth resistor R4 form a low-pass filter to further filter the residual interference. The ratio of the fourth resistor R4 to the adjustable potentiometer AR will be the amplification of the amplifier. The capacitance of the second capacitor C2 is 331F, and the resistance of the fourth resistor R4 is 10k Ω.
The third capacitor C3 is a coupling capacitor and functions to block direct current and alternating current. The capacitance of the third capacitor C3 is 1uF, and all signals can pass through by applying the capacitance of 1 uF.
It is understood that the first operational amplifier U1 may be a model LM358, and the LM358 may be a dual operational amplifier, in which one pin may be externally connected to the power supply VCC and one pin may be grounded.
Further, the physical state monitoring circuit further includes a signal shaping circuit 201; the signal amplifying circuit 200 is connected with the signal shaping circuit 201, and the signal shaping circuit 201 is connected with the single chip microcomputer processing circuit 300.
It is understood that a signal shaping circuit 201 may be additionally introduced to shape the amplified pulse signal.
Further, the signal shaping circuit 201 includes a second operational amplifier U2, a fifth resistor R5, a sixth resistor R6, and a second power source VCC 2;
the signal amplification circuit 200 is connected with a positive input end of the second operational amplifier U2;
a first end of the fifth resistor R5 is grounded, a second end of the fifth resistor R5 is connected to a first end of the sixth resistor R6 and a negative input end of the second operational amplifier U2, respectively, and a second end of the sixth resistor R6 is connected to the second power source VCC 2;
the output end of the second operational amplifier U2 is connected with the single chip microcomputer processing circuit 300.
In a particular implementation, the second operational amplifier U2 is of the type LM358 for the signal shaping circuit 201. The second operational amplifier U2 may be a voltage comparator for comparing two analog voltage values to output a high level. For example, when a heart rate beat is detected, the output end of LM358 will output a high level, so that the single chip processing circuit 300 counts the high level to obtain the heart rate value.
The resistance of the fifth resistor R5 is 10k Ω, and the resistance of the sixth resistor R6 is 10k Ω.
Further, the signal shaping circuit 201 further includes a light emitting diode and a seventh resistor R7;
an output end of the second operational amplifier U2 is connected to a first end of the light emitting diode, a second end of the light emitting diode is connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is grounded.
It should be appreciated that when the output of LM358 will output high, the led will light up once, and the operation indication will be better, considering that the first terminal of the led is positive and the second terminal is negative, and the current returns from the led to ground.
The resistance value of the seventh resistor R7 is 10k Ω.
Further, the body state monitoring circuit further comprises a KEY circuit, wherein the KEY circuit comprises a first KEY1, a second KEY2 and a third KEY 3;
the first KEY end K1 of the single chip microcomputer processing circuit 300 is connected with the first end of the first KEY1, the second KEY end K2 of the single chip microcomputer processing circuit 300 is connected with the first end of the second KEY2, and the third KEY end K3 of the single chip microcomputer processing circuit 300 is connected with the first end of the third KEY 3;
a second end of the first KEY1 is connected to a second end of the second KEY2 and a second end of the third KEY3, respectively, and a second end of the third KEY3 is grounded.
It can be understood that a key circuit can be introduced, and the key circuit is connected with the single chip microcomputer processing circuit 300.
In a specific implementation, as for the key circuit, all three pins of the processing chip X in the mcu processing circuit 300 will be grounded through the key. For example, when a certain key is pressed, the corresponding key end of the processing chip X displays a low level, and then the corresponding operation can be executed.
Specifically, the first KEY1 to the third KEY3 may be a set KEY, an add KEY, and a subtract KEY, respectively, and the range of the normal heart rate is set by pressing different KEYs, so that an alarm prompt is given when the range is exceeded.
Further, the body state monitoring circuit further comprises a buzzer alarm circuit, and the buzzer alarm circuit comprises an eighth resistor R8, a triode M, a buzzer L and a third power supply VCC 3;
the single chip microcomputer processing circuit 300 is connected with the first end of the eighth resistor R8, the second end of the eighth resistor R8 is connected with the base electrode of the triode M, the collector electrode of the triode M is grounded, the emitting electrode of the triode M is connected with the first end of the buzzer L, and the second end of the buzzer L is connected with the third power VCC 3.
It can be understood that a buzzer alarm circuit can be introduced, and the buzzer alarm circuit is connected with the single chip microcomputer processing circuit 300.
In a specific implementation, as for the buzzer alarm circuit, the transistor 9012 may be used to drive the buzzer L, and the transistor M of the transistor 9012 may be a PNP transistor. By utilizing the switching function of the triode M, the eighth resistor R8 is a current-limiting resistor, when the processing chip X outputs a low level, the triode M is turned on, and the current passes through the buzzer L from the third power supply VCC3 and then returns to the ground through the triode M. It can be seen that when the processing chip X outputs a low level, the buzzer L will sound, thereby implementing an alarm function.
The resistance value of the eighth resistor R8 is 2.2k Ω.
Further, a display circuit can be introduced, and the display circuit is connected with the singlechip processing circuit 300.
It is understood that the display circuit will include a dot matrix character type LCD module, which may be of the LCD1602 type, and the display capacity of the module is 2 × 16 words, and the module can display heart rate values, body temperature values, etc.
Further, the processing chip X in the single chip microcomputer processing circuit 300 can be externally connected with a reset circuit and a clock circuit.
For the reset circuit, a reset pin of the processing chip X is respectively connected with a first end of a reset capacitor and a first end of a reset key, a second end of the reset capacitor is respectively connected with a second end of the reset key and a first end of a reset resistor, and the first end of the reset resistor is connected with a reset power supply; the second end of the reset resistor is grounded. The capacitance value of the reset capacitor is 1nF, and the resistance value of the reset resistor is 10k omega. Therefore, the processing chip can enter an initialization state by pressing the reset key.
In the case of a clock circuit, the clock pin of the processing chip X may be connected to a clock circuit, which may provide a clock signal.
The utility model also provides an electronic equipment, this electronic equipment include above-mentioned health state monitoring circuit, and this health state monitoring circuit's concrete structure refers to above-mentioned embodiment, because this electronic equipment has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
The electronic device may be a heart rate thermometer.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A body state monitoring circuit is characterized by comprising a flow rate acquisition circuit, a signal amplification circuit and a single chip microcomputer processing circuit; the flow rate acquisition circuit is connected with the signal amplification circuit, and the signal amplification circuit is connected with the single chip microcomputer processing circuit; wherein the content of the first and second substances,
the flow rate acquisition circuit is used for acquiring the flow rate of finger blood;
the signal amplification circuit is used for amplifying the finger blood flow speed and outputting an amplified signal;
and the singlechip processing circuit is used for processing the amplified signal and outputting a heart rate value.
2. The physical condition monitoring circuit of claim 1, further comprising a body temperature acquisition circuit, the body temperature acquisition circuit being connected to the single-chip processing circuit.
3. The physical condition monitoring circuit of claim 1, wherein the flow rate acquisition circuit comprises a first power source, a first resistor, a second resistor, a third resistor, an infrared transmitting tube, an infrared receiving tube, and a first capacitor;
the first power supply is respectively connected with the first end of the first resistor and the first end of the second resistor;
the second end of the first resistor is connected with the first end of the infrared emission tube;
the second end of the second resistor is respectively connected with the first end of the infrared receiving tube and the first end of the first capacitor, and the second end of the first capacitor is respectively connected with the first end of the third resistor and the signal amplifying circuit;
and the second end of the infrared transmitting tube is respectively connected with the second end of the infrared receiving tube and the second end of the third resistor, and the second end of the third resistor is grounded.
4. The physical state monitoring circuit of claim 1, wherein the signal amplification circuit comprises a first operational amplifier, an adjustable potentiometer, a second capacitor, a third capacitor, and a fourth resistor;
the flow rate acquisition circuit is connected with the positive input end of the first operational amplifier;
the first end of the adjustable potentiometer is grounded, the sliding end of the adjustable potentiometer is connected with the negative input end of the first operational amplifier, and the second end of the adjustable potentiometer is respectively connected with the first end of the second capacitor and the first end of the fourth resistor;
the output end of the first operational amplifier is respectively connected with the second end of the second capacitor, the second end of the fourth resistor and the first end of the third capacitor, and the second end of the third capacitor is connected with the single chip microcomputer processing circuit.
5. The body condition monitoring circuit of claim 1, wherein the body condition monitoring circuit further comprises a signal shaping circuit; the signal amplifying circuit is connected with the signal shaping circuit, and the signal shaping circuit is connected with the single chip microcomputer processing circuit.
6. The body condition monitoring circuit of claim 5, wherein the signal shaping circuit comprises a second operational amplifier, a fifth resistor, a sixth resistor, and a second power supply;
the signal amplification circuit is connected with the positive input end of the second operational amplifier;
a first end of the fifth resistor is grounded, a second end of the fifth resistor is respectively connected with a first end of the sixth resistor and a negative input end of the second operational amplifier, and a second end of the sixth resistor is connected with the second power supply;
and the output end of the second operational amplifier is connected with the singlechip processing circuit.
7. The physical condition monitoring circuit of claim 6, wherein the signal shaping circuit further comprises a light emitting diode and a seventh resistor;
the output end of the second operational amplifier is connected with the first end of the light-emitting diode, the second end of the light-emitting diode is connected with the first end of the seventh resistor, and the second end of the seventh resistor is grounded.
8. The physical status monitoring circuit according to any one of claims 1 to 7, further comprising a key circuit, the key circuit comprising a first key, a second key and a third key;
the first key end of the single chip microcomputer processing circuit is connected with the first end of the first key, the second key end of the single chip microcomputer processing circuit is connected with the first end of the second key, and the third key end of the single chip microcomputer processing circuit is connected with the first end of the third key;
the second end of the first key is connected with the second end of the second key and the second end of the third key respectively, and the second end of the third key is grounded.
9. The physical status monitoring circuit according to any one of claims 1 to 7, further comprising a buzzer alarm circuit including an eighth resistor, a transistor, a buzzer, and a third power supply;
the single chip microcomputer processing circuit is connected with the first end of the eighth resistor, the second end of the eighth resistor is connected with the base electrode of the triode, the collector electrode of the triode is grounded, the emitting electrode of the triode is connected with the first end of the buzzer, and the second end of the buzzer is connected with the third power supply.
10. An electronic device, characterized in that it comprises a body condition monitoring circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920641815.6U CN210055998U (en) | 2019-05-06 | 2019-05-06 | Body state monitoring circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920641815.6U CN210055998U (en) | 2019-05-06 | 2019-05-06 | Body state monitoring circuit and electronic equipment |
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| CN210055998U true CN210055998U (en) | 2020-02-14 |
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| CN201920641815.6U Expired - Fee Related CN210055998U (en) | 2019-05-06 | 2019-05-06 | Body state monitoring circuit and electronic equipment |
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Granted publication date: 20200214 Termination date: 20210506 |