Sleep-aiding music volume automatic control circuit

Abstract

The utility model discloses a sleep-aiding music volume automatic control circuit, which comprises a function module and a power supply circuit, and the function module is electrically connected with the power supply circuit. The function module comprises a main control circuit, a volume control circuit, a Bluetooth music playing circuit, a power amplifier circuit, a loudspeaker assembly and a sleep detection circuit, and the main control circuit is electrically connected with the sleep detection circuit and the volume control circuit; the volume control circuit is further electrically connected with the Bluetooth music playing circuit and the power amplifier circuit, and the power amplifier circuit is electrically connected with the loudspeaker assembly. The main control circuit confirms the sleep state of the user through the vital sign signals obtained by the sleep detection circuit, and the automatic volume control function of sleep-aiding music is achieved in a matched mode based on the volume control circuit, so that the use experience of the user is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of smart home, in particular to an automatic volume control circuit for sleep-aiding music. Background Art

[0002] Smart home is a popular product at present. Among various sleep products, during the playback of sleep-aiding music, the existing technology controls the music playback by timing to turn off the music, which leads to poor user experience and does not reflect the effect of smart control.

[0003] Therefore, currently, there is an urgent need for a solution that can control the volume of sleep-aiding music according to the sleep state. Utility Model Content

[0004] In view of the above problems, the present utility model is proposed to provide a sleep-aiding music volume automatic control circuit that overcomes the above problems or at least partially solves the above problems.

[0005] The utility model provides a sleep-aiding music volume automatic control circuit, the sleep-aiding music volume automatic control circuit comprising:

[0006] A functional module and a power supply circuit, the functional module is electrically connected to the power supply circuit, the functional module includes a main control circuit, a volume control circuit, a Bluetooth music playback circuit, a power amplifier circuit, a speaker assembly and a sleep detection circuit, wherein the main control circuit is electrically connected to the sleep detection circuit and the volume control circuit respectively, the volume control circuit is also electrically connected to the Bluetooth music playback circuit and the power amplifier circuit respectively, and the power amplifier circuit is electrically connected to the speaker assembly.

[0007] Optionally, the Bluetooth music playback circuit includes a first processing unit, a first resistor, a second resistor, a third resistor, a first TVS diode, a second TVS diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a crystal oscillator and a first inductor; the first processing unit includes 24 groups of pins, wherein one end of the second resistor is connected to pin 2 of the first processing unit, and the other end of the second resistor is grounded; one end of the third resistor is connected to pin 1 of the first processing unit, and the other end of the third resistor is respectively connected to the cathode of the first TVS diode and the anode of the second TVS diode; one end of the first resistor is connected to the anode of the first TVS diode, and the other end of the first resistor is connected to the power supply circuit; the cathode of the second TVS diode is grounded; one end of the crystal oscillator and the fifth capacitor in common is connected to pin 24 of the first processing unit. One end of the crystal oscillator and the sixth capacitor in common connection is connected to pin 23 of the first processing unit, the other end of the fifth capacitor is grounded, and the other end of the sixth capacitor is grounded; one end of the first capacitor is connected to pin 10 of the first processing unit, and the other end of the first capacitor is connected to pin 9 of the first processing unit and grounded; one end of the second capacitor is connected to pin 20 of the first processing unit, and the other end of the second capacitor is grounded; one end of the third capacitor is connected to pin 19 of the first processing unit and a power supply circuit, and the other end of the third capacitor is grounded; one end of the fourth capacitor is connected to pin 18 of the first processing unit, and the other end of the fourth capacitor is grounded; one end of the seventh capacitor and the first inductor L4 in common connection is connected to pin 22 of the first processing unit, the other end of the seventh capacitor is connected to the eighth capacitor, and the other end of the eighth capacitor is respectively connected to the other end of the first inductor and grounded.

[0008] Optionally, the volume control circuit includes a second processing unit, a fourth resistor and a ninth capacitor; the second processing unit includes 6 groups of pins, wherein pin 1 of the second processing unit is respectively connected to the power supply circuit and one end of the ninth capacitor, pin 2 of the second processing unit is respectively connected to the other end of the ninth capacitor and ground, pin 3 and pin 4 of the second processing unit are respectively connected to the main control circuit, pin 5 of the second processing unit is grounded, pin 6 of the second processing unit is respectively connected to the power amplifier circuit and one end of the fourth resistor, and the other end of the fourth resistor is connected to the Bluetooth music playback circuit.

[0009] Optionally, the power amplifier circuit includes a third processing unit, a fifth resistor, a sixth resistor, a seventh resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a thirteenth capacitor; the third processing unit includes 8 groups of pins, wherein pin 1 of the third processing unit is respectively connected to one end of the fifth resistor and the main control circuit, and the other end of the fifth resistor is connected to the power supply circuit; one end of the tenth capacitor is respectively connected to pin 2 and pin 3 of the third processing unit, and the other end of the tenth capacitor is grounded; pin 4 of the third processing unit is respectively connected to one end of the sixth resistor and one end of the seventh resistor; two ends of the eleventh capacitor are respectively connected to the other end of the sixth resistor and the volume control circuit; pin 5 of the third processing unit is respectively connected to the other end of the seventh resistor and the speaker assembly; pin 6 of the third processing unit is respectively connected to one end of the twelfth capacitor, one end of the thirteenth capacitor and the power supply circuit, the other end of the twelfth capacitor is grounded, and the other end of the thirteenth capacitor is grounded; pin 7 of the third processing unit is grounded; pin 8 of the third processing unit is connected to the speaker assembly.

[0010] Optionally, the sleep detection circuit includes a vital sign detection unit, a signal input port, and a signal processing unit which are electrically connected in sequence, and the signal processing unit is connected to the main control circuit.

[0011] Optionally, the vital sign detection unit is a piezoelectric sensor that can detect human vital signs, and the piezoelectric sensor is a piezoelectric cable sensor or a piezoelectric film sensor.

[0012] Optionally, the signal processing unit includes a signal amplification circuit, an industrial frequency filtering circuit and a signal separation circuit which are electrically connected in sequence, the input end of the signal amplification circuit is electrically connected to the signal input port, and the output end of the signal separation circuit is electrically connected to the main control circuit.

[0013] Optionally, the signal separation circuit includes three parallel-connected first vital sign output circuit, second vital sign output circuit and third vital sign output circuit.

[0014] The technical solution provided in the embodiment of the utility model has at least the following technical effects or advantages:

[0015] The automatic volume control circuit for sleep-aiding music described in the embodiment of the utility model, the main control circuit confirms the user's sleep state through the vital sign signal obtained by the sleep detection circuit, and cooperates to realize the automatic volume control function of the sleep-aiding music based on the volume control circuit, thereby greatly improving the user experience and having good application prospects.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the principle structure of the automatic volume control circuit for sleep-aiding music described in the utility model;

[0019] Figure 2 A reference circuit diagram of the Bluetooth music playback circuit;

[0020] Figure 3 is a reference circuit diagram of the volume control circuit;

[0021] Figure 4 is a reference circuit diagram of the power amplifier circuit;

[0022] Figure 5 is a schematic diagram of the principle structure of the sleep detection circuit;

[0023] Figure 6 is a reference circuit diagram of the signal processing unit.

[0024] Description of reference numerals:

[0025] 100, main control circuit; 200, volume control circuit; 300, Bluetooth music playback circuit; 400, power amplifier circuit; 500, speaker assembly; 600, sleep detection circuit; 610, vital sign detection unit; 620, signal input port; 630, signal processing unit; 631, signal amplification circuit; 632, industrial frequency filtering circuit; 633, signal separation circuit; 700, power supply circuit. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0027] In order to enable those skilled in the art to better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. The drawings show preferred embodiments of the present invention. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] Unless otherwise specified, various raw materials, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0029] Figure 1 This is a schematic diagram of the principle structure of a sleep-aid music volume automatic control circuit provided by the utility model. Figure 1 As shown, the sleep-aiding music volume automatic control circuit includes a functional module and a power circuit 700, wherein the functional module is electrically connected to the power circuit 700, and the functional module includes a main control circuit 100, a volume control circuit 200, a Bluetooth music playback circuit 300, a power amplifier circuit 400, a speaker assembly 500, and a sleep detection circuit 600, wherein the main control circuit 100 is electrically connected to the sleep detection circuit 600 and the volume control circuit 200, respectively, and the volume control circuit 200 is also electrically connected to the Bluetooth music playback circuit 300 and the power amplifier circuit 400, respectively, and the power amplifier circuit 400 is electrically connected to the speaker assembly 500; the sleep detection circuit 600 is used to detect The vital sign signal is separated and output to the main control circuit 100 for detecting the vital sign signal. The Bluetooth music playing circuit 300 is used to control the Bluetooth music playing function. The volume control circuit 200 is used to control the attenuation of the audio signal when the Bluetooth music player outputs the music. The power amplifier circuit 400 is used to amplify the audio signal and output it to the speaker component 500. The speaker component 500 is used to play the sound. The main control circuit 100 is used to process the detection result of the sleep detection circuit 600 and input the control signal to the volume control circuit 200. The power supply circuit 700 is used to supply power to each functional module in the functional module.

[0030] See also Figure 2As shown, it is a reference circuit diagram of the Bluetooth music playback circuit 300, and the Bluetooth music playback circuit 300 includes a first processing unit U6, a first resistor R24, a second resistor R25, a third resistor R26, a first TVS diode D5, a second TVS diode D6, a first capacitor C52, a second capacitor C53, a third capacitor C54, a fourth capacitor C55, a fifth capacitor C56, a sixth capacitor C57, a seventh capacitor C58, an eighth capacitor C59, a crystal oscillator X4 and a first inductor L4; the first processing unit U6 includes 24 groups of pins, wherein the second resistor R One end of the third resistor R25 is connected to the pin 2 of the first processing unit U6, and the other end of the second resistor R25 is grounded; one end of the third resistor R26 is connected to the pin 1 of the first processing unit U6, and the other end of the third resistor R26 is respectively connected to the cathode of the first TVS diode D5 and the anode of the second TVS diode D6; one end of the first resistor R24 ​​is connected to the anode of the first TVS diode D5, and the other end of the first resistor R24 ​​is connected to the power supply circuit; the cathode of the second TVS diode D6 is grounded; the crystal oscillator X4 and the fifth capacitor C5 One end of the first capacitor C52 is connected to the pin 10 of the first processing unit U6, and the other end of the first capacitor C52 is connected to the pin 9 of the first processing unit U6 and the ground; one end of the second capacitor C53 is connected to the pin 20 of the first processing unit U6, and the other end of the second capacitor C53 is connected to the pin 21 of the first processing unit U6. end is grounded; one end of the third capacitor C54 is connected to pin 19 of the first processing unit U6 and the power supply circuit, and the other end of the third capacitor C54 is grounded; one end of the fourth capacitor C55 is connected to pin 18 of the first processing unit U6, and the other end of the fourth capacitor C55 is grounded; one end of the seventh capacitor C58 and the first inductor L4 are connected to pin 22 of the first processing unit U6, and the other end of the seventh capacitor C58 is connected to the eighth capacitor C59, and the other end of the eighth capacitor C59 is respectively connected to the other end of the first inductor L4 and ground.

[0031] In the embodiment of the present utility model, the product model of the first processing unit U6 is AC6965A.

[0032] The Bluetooth music playing circuit 300 receives the control signal of the volume control circuit 200, thereby controlling the attenuation of the audio signal during music playing output.

[0033] See also Figure 3As shown, it is a reference circuit diagram of the volume control circuit 200, and the volume control circuit 200 includes a second processing unit U7, a fourth resistor R27 and a ninth capacitor C60; the second processing unit U7 includes 6 groups of pins, wherein pin 1 of the second processing unit U7 is respectively connected to the power supply circuit and one end of the ninth capacitor C60, pin 2 of the second processing unit U7 is respectively connected to the other end of the ninth capacitor C60 and ground, pin 3 and pin 4 of the second processing unit U7 are respectively connected to the main control circuit 100, pin 5 of the second processing unit U7 is grounded, pin 6 of the second processing unit U7 is respectively connected to the power amplifier circuit 400 and one end of the fourth resistor R27, and the other end of the fourth resistor R27 is connected to the first processing unit U6 (pin 11) of the Bluetooth music playback circuit 300.

[0034] In the embodiment of the utility model, the product model of the first processing unit U7 is MCP40D17T-104E / LT.

[0035] The volume control circuit 200 is used to cooperate with the Bluetooth music playing circuit 300 and the power amplifier circuit 400 to achieve volume control and volume output.

[0036] See also Figure 4 As shown, it is a reference circuit diagram of the power amplifier circuit 400, the power amplifier circuit 400 includes a third processing unit U9, a fifth resistor R29, a sixth resistor R30, a seventh resistor R31, a tenth capacitor C62, an eleventh capacitor C63, a twelfth capacitor C66 and a thirteenth capacitor C67; the third processing unit U9 includes 8 groups of pins, wherein the pin 1 of the third processing unit U9 is respectively connected to one end of the fifth resistor R29 and the main control circuit 100, and the other end of the fifth resistor R29 is connected to the power supply circuit; one end of the tenth capacitor C62 is respectively connected to the pin 2 and the pin 3 of the third processing unit U9, and the other end of the tenth capacitor C62 is grounded; the pin 4 of the third processing unit U9 is respectively connected to One end of the sixth resistor R30 and one end of the seventh resistor R31 are connected; both ends of the eleventh capacitor C63 are respectively connected to the other end of the sixth resistor R30 and the volume control circuit 200; Pin 5 of the third processing unit U9 is respectively connected to the other end of the seventh resistor R31 and the speaker assembly 500 (SPKR-); Pin 6 of the third processing unit U9 is respectively connected to one end of the twelfth capacitor C66, one end of the thirteenth capacitor C67 and the power supply circuit, the other end of the twelfth capacitor C66 is grounded, and the other end of the thirteenth capacitor C67 is grounded; Pin 7 of the third processing unit U9 is grounded; Pin 8 of the third processing unit U9 is connected to the speaker assembly 500 (SPKR+).

[0037] In the embodiment of the utility model, the product model of the first processing unit U9 is TC8002D.

[0038] The power amplifier circuit 400 is used to amplify the power of the audio signal and then output it to the speaker assembly 500 .

[0039] See also Figure 5 As shown, it is a schematic diagram of the principle structure of the sleep detection circuit 600. In an embodiment of the utility model, the sleep detection circuit includes a vital sign detection unit 610, a signal input port 620 and a signal processing unit 630 which are electrically connected in sequence, and the signal processing unit 630 is connected to the main control circuit 100.

[0040] The vital sign detection unit 610 is a piezoelectric sensor that can detect human vital signs. The piezoelectric sensor is used to detect the human heart rate, respiratory rate and snoring frequency, and convert the detected human heart rate, respiratory rate and snoring frequency into corresponding electrical signals (i.e., vital sign signals) and output them; the piezoelectric sensor can be a piezoelectric cable sensor or a piezoelectric film sensor.

[0041] The signal input port 620 is used to input the vital sign signal collected by the vital sign detection unit 610 into the signal processing unit 630 .

[0042] Since different vital signs of the human body have different frequency bands, the signal processing unit 630 is used to separate the corresponding vital sign signals according to the frequency bands of different vital signs. For example, the human heart rate frequency band is usually 0.7Hz~2.25Hz, the breathing frequency band is usually 0.13Hz~0.58Hz, and the snoring frequency band is usually 200Hz~800Hz. The signal separation circuit 633403 can filter out the vital sign signals of 0.7Hz~2.25Hz, 0.13Hz~0.58Hz and 200Hz~800Hz as the heart rate vital sign signal, the breathing vital sign signal and the snoring vital sign signal, so as to analyze and record the vital sign status, thereby monitoring the sleep condition.

[0043] The signal processing unit 630 includes a signal amplifying circuit 631, an industrial frequency filtering circuit 632 and a signal separating circuit 633 which are electrically connected in sequence. The input end of the signal amplifying circuit 631 is electrically connected to the signal input port 620, and the output end of the signal separating circuit 633 is electrically connected to the main control circuit 100.

[0044] The signal amplifier circuit 631 is used to amplify the received vital sign signal so that the tiny vital sign signal can be received by the subsequent circuit after being amplified. The utility model adopts a single-ended input method to directly amplify the received single-ended signal, and can use a low-cost ordinary operational amplifier for amplification processing, thereby reducing costs.

[0045] The input end of the power frequency filter circuit 632 is connected to the output end of the signal amplifying circuit 631 . The power frequency filter circuit 632 is used to filter out the power frequency noise in the received vital sign signal and output the filtered vital sign signal.

[0046] See also Figure 6 As shown, it is a reference circuit diagram of the signal processing unit 630, wherein the signal separation circuit 633 is used to separate the vital sign signal of the corresponding frequency from the vital sign signal after amplification and filtering, wherein the signal separation circuit 633 includes a first vital sign output circuit, a second vital sign output circuit and a third vital sign output circuit connected in parallel in three ways, and the first vital sign output circuit, the second vital sign output circuit and the third vital sign output circuit respectively output the separated vital sign signals.

[0047] The input end of the first vital sign output circuit is electrically connected to the output end of the power frequency filter circuit 632; the first vital sign output circuit is used to separate the first vital sign signal from the vital sign signal and output it to the main control circuit 100 through the ADC1 connection end;

[0048] The input end of the second vital sign output circuit is electrically connected to the output end of the power frequency filter circuit 632402; the second vital sign output circuit is used to separate the second vital sign signal from the vital sign signal and output it to the main control circuit 100 through the ADC2 connection end;

[0049] The input end of the third vital sign output circuit is electrically connected to the output end of the power frequency filter circuit 632402; the third vital sign output circuit is used to separate the third vital sign signal from the vital sign signal and output it to the main control circuit 100 through the ADC3 connection end;

[0050] In an embodiment of the utility model, the first vital sign output circuit is used to filter out a first vital sign signal in a first frequency band, such as a heart rate vital sign signal of 0.7 Hz to 2.25 Hz. The second vital sign output circuit is used to filter out a second vital sign signal in a second frequency band, such as a respiratory vital sign signal of 0.13 Hz to 0.58 Hz. The third vital sign output circuit is used to filter out a third vital sign signal in a third frequency band, such as a snoring vital sign signal of 200 Hz to 800 Hz.

[0051] In an embodiment of the present invention, the main control circuit 100 can determine the sleep state of the human body according to the vital sign signal output by the signal processing unit 630, and send a control signal to the volume control circuit 200 to respectively control the volume output.

[0052] The power supply circuit 700 is used to supply power to each functional module in the functional module, such as the main control circuit 100, the volume control circuit 200, the Bluetooth music playback circuit 300, the power amplifier circuit 400, the speaker assembly 500 and the sleep detection circuit 600.

[0053] In the automatic volume control circuit for sleep-aiding music described in the embodiment of the utility model, the main control circuit 100 confirms the user's sleep state through the vital sign signal obtained by the sleep detection circuit, and cooperates to realize the automatic volume control function of the sleep-aiding music based on the volume control circuit 200, thereby greatly improving the user experience and having a good application prospect.

[0054] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0055] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: the claimed utility model requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims, the utility model aspects are less than all the features of the previously disclosed single embodiment. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0056] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A sleep-aiding music volume automatic control circuit, characterized in that: The sleep-aid music volume automatic control circuit includes: a functional module and a power supply circuit, the functional module is electrically connected to the power supply circuit, the functional module includes a main control circuit, a volume control circuit, a Bluetooth music playback circuit, a power amplifier circuit, a speaker component and a sleep detection circuit, wherein the main control circuit is electrically connected to the sleep detection circuit and the volume control circuit, respectively, the volume control circuit is also electrically connected to the Bluetooth music playback circuit and the power amplifier circuit, respectively, and the power amplifier circuit is electrically connected to the speaker component.

2. The sleep-aiding music volume automatic control circuit according to claim 1, characterized in that: The Bluetooth music playback circuit includes a first processing unit, a first resistor, a second resistor, a third resistor, a first TVS diode, a second TVS diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a crystal oscillator and a first inductor; the first processing unit includes 24 groups of pins, wherein one end of the second resistor is connected to pin 2 of the first processing unit, and the other end of the second resistor is grounded; one end of the third resistor is connected to pin 1 of the first processing unit, and the other end of the third resistor is respectively connected to the cathode of the first TVS diode and the anode of the second TVS diode; one end of the first resistor is connected to the anode of the first TVS diode, and the other end of the first resistor is connected to the power supply circuit; the cathode of the second TVS diode is grounded; one end of the crystal oscillator and the fifth capacitor are connected to pin 24 of the first processing unit, and the One end of the crystal oscillator and the sixth capacitor in common connection is connected to pin 23 of the first processing unit, the other end of the fifth capacitor is grounded, and the other end of the sixth capacitor is grounded; one end of the first capacitor is connected to pin 10 of the first processing unit, and the other end of the first capacitor is connected to pin 9 of the first processing unit and grounded; one end of the second capacitor is connected to pin 20 of the first processing unit, and the other end of the second capacitor is grounded; one end of the third capacitor is connected to pin 19 of the first processing unit and a power supply circuit, and the other end of the third capacitor is grounded; one end of the fourth capacitor is connected to pin 18 of the first processing unit, and the other end of the fourth capacitor is grounded; one end of the seventh capacitor and the first inductor L4 in common connection is connected to pin 22 of the first processing unit, the other end of the seventh capacitor is connected to the eighth capacitor, and the other end of the eighth capacitor is respectively connected to the other end of the first inductor and grounded.

3. The sleep-aiding music volume automatic control circuit according to claim 1, characterized in that: The volume control circuit includes a second processing unit, a fourth resistor and a ninth capacitor; the second processing unit includes 6 groups of pins, wherein pin 1 of the second processing unit is respectively connected to the power supply circuit and one end of the ninth capacitor, pin 2 of the second processing unit is respectively connected to the other end of the ninth capacitor and ground, pin 3 and pin 4 of the second processing unit are respectively connected to the main control circuit, pin 5 of the second processing unit is grounded, pin 6 of the second processing unit is respectively connected to the power amplifier circuit and one end of the fourth resistor, and the other end of the fourth resistor is connected to the Bluetooth music playback circuit.

4. The sleep-aiding music volume automatic control circuit according to claim 1, characterized in that: The power amplifier circuit includes a third processing unit, a fifth resistor, a sixth resistor, a seventh resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a thirteenth capacitor; the third processing unit includes 8 groups of pins, wherein pin 1 of the third processing unit is respectively connected to one end of the fifth resistor and the main control circuit, and the other end of the fifth resistor is connected to the power supply circuit; one end of the tenth capacitor is respectively connected to pin 2 and pin 3 of the third processing unit, and the other end of the tenth capacitor is grounded; pin 4 of the third processing unit is respectively connected to one end of the sixth resistor and one end of the seventh resistor; two ends of the eleventh capacitor are respectively connected to the other end of the sixth resistor and the volume control circuit; pin 5 of the third processing unit is respectively connected to the other end of the seventh resistor and the speaker assembly; pin 6 of the third processing unit is respectively connected to one end of the twelfth capacitor, one end of the thirteenth capacitor and the power supply circuit, the other end of the twelfth capacitor is grounded, and the other end of the thirteenth capacitor is grounded; pin 7 of the third processing unit is grounded; pin 8 of the third processing unit is connected to the speaker assembly.

5. The sleep-aiding music volume automatic control circuit according to claim 1, characterized in that: The sleep detection circuit includes a vital sign detection unit, a signal input port and a signal processing unit which are electrically connected in sequence, and the signal processing unit is connected to the main control circuit.

6. The sleep-aiding music volume automatic control circuit according to claim 5, characterized in that: The vital sign detection unit is a piezoelectric sensor capable of detecting human vital signs, and the piezoelectric sensor is a piezoelectric cable sensor or a piezoelectric film sensor.

7. The sleep-aiding music volume automatic control circuit according to claim 5, characterized in that: The signal processing unit includes a signal amplifying circuit, an industrial frequency filtering circuit and a signal separating circuit which are electrically connected in sequence, the input end of the signal amplifying circuit is electrically connected to the signal input port, and the output end of the signal separating circuit is electrically connected to the main control circuit.

8. The sleep-aiding music volume automatic control circuit according to claim 7, characterized in that: The signal separation circuit comprises a first vital sign output circuit, a second vital sign output circuit and a third vital sign output circuit which are connected in parallel.

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