CN109361982B - Drive circuit and rhythm of heart earphone of earphone - Google Patents
Drive circuit and rhythm of heart earphone of earphone Download PDFInfo
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- CN109361982B CN109361982B CN201811422965.4A CN201811422965A CN109361982B CN 109361982 B CN109361982 B CN 109361982B CN 201811422965 A CN201811422965 A CN 201811422965A CN 109361982 B CN109361982 B CN 109361982B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
Abstract
The invention discloses a driving circuit of an earphone and a heart rate earphone. Heart rate detection module detects the rhythm of the heart, and voltage acquisition module detects power module's magnitude of voltage, control module are in rhythm of the heart detection module during operation, just voltage acquisition module detects when power module's magnitude of voltage is less than or equal to the predetermined magnitude of voltage, the control signal is turned down to the output volume, power amplifier module basis the volume control signal adjusts the volume size of output. The invention solves the problem of inaccurate heart rate test data of the heart rate earphone in the prior art.
Description
Technical Field
The invention relates to the technical field of display devices, in particular to a driving circuit of an earphone and a heart rate earphone.
Background
At present, along with the attention of people to sports and the wearable development, a plurality of earphone manufacturers begin to research and develop own heart rate earphones, so that the heart rate earphones are more and more. The heart rate earphone mainly comprises: bluetooth module, audio input output module, button module, storage module, power module, rhythm of the heart module. Due to the increase of the heart rate module, the power consumption of the whole earphone is increased, and the endurance time of the earphone is further reduced. Meanwhile, in the whole earphone, the proportion of the heart rate detection module in the total power consumption is large, and certain requirements are also made on the amplitude and the precision of the voltage.
When the user used bluetooth headset to run, if the user opened the rhythm of the heart module this moment, then the power consumption of whole earphone will increase in the twinkling of an eye, if the user increases the consumption of volume then can accelerate the electric quantity this moment, if the electric quantity of earphone this moment is not many, then the phenomenon that rhythm of the heart detection module power supply is not enough can appear, and then will influence the precision of test, rhythm of the heart test data is inaccurate.
Disclosure of Invention
The invention mainly aims to provide a driving circuit of an earphone, and aims to solve the problem that existing heart rate earphones are inaccurate in heart rate test data.
In order to achieve the above object, the present invention provides a driving circuit of an earphone, including:
a power supply module;
the heart rate detection module is used for detecting the heart rate;
the voltage acquisition module is used for detecting the voltage value of the power supply module;
the control module is used for outputting a volume reduction control signal when the heart rate detection module works and the voltage value of the power supply module detected by the voltage acquisition module is smaller than or equal to a preset voltage value;
and the power amplifier module is used for adjusting the output volume according to the volume control signal.
Optionally, the control module includes a first input end, a second input end and a first output end, and the input/output end of the power supply module is connected to the detection end of the voltage acquisition module; the output end of the heart rate detection module is connected with the first input end of the control module; the second input end of the control module is connected with the output end of the voltage acquisition module, and the first output end of the control module is connected with the input end of the power amplifier module.
Optionally, the driving circuit of the earphone further includes an audio switching module and a first key module, the control module further includes a third input end and a first input/output end, the audio switching module obtains an audio signal from an audio terminal, and the input/output end of the audio switching module is connected to the first input/input end of the control module; the output end of the first key module is connected with the third input end of the control module;
the audio exchange module is also used for outputting audio signals to the audio terminal;
the first key module is used for sending a first control signal to the control module so as to turn on/off the heart rate detection module;
and/or the presence of a gas in the gas,
the first key module is used for sending a second control signal to the control module so as to increase the volume output by the power amplification module;
and the first key module is used for sending a third control signal to the control module so as to reduce the volume output by the power amplification module.
Optionally, the heart rate detection module is a heart rate sensor.
Optionally, the voltage acquisition module includes a first chip, and a model of the first chip is ADC 0832.
Optionally, the power amplifier module includes a second chip, a first player and a second player, the first output end of the control module includes a first right channel output end and a first left channel output end, the control module further includes a first clock signal output end and a first control signal output end, the second chip includes an enable pin and a clock signal input pin, a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin, the enable pin of the second chip is connected with the first control signal output end of the control module, the clock signal input pin of the second chip is connected with the first clock signal output end of the control module, the first signal input pin of the second chip is connected with the first right channel output end of the control module, the second signal input pin of the second chip is connected with the first left channel output end of the control module, the first signal output pin of the second chip is connected with the input end of the first player, and the second signal output pin of the second chip is connected with the input end of the second player.
Optionally, the audio frequency exchanging module includes an antenna, a first inductor and a filter, the control module further includes a fifth input end, and an input/output end of the antenna is connected to the first end of the first inductor; the input end of the filter is connected with the second end of the first inductor, and the output end of the filter is connected with the first input/output end of the control module.
Optionally, the first key module includes a first switch, a second switch and a third switch, the third input end of the control module includes a first switch signal input end, a second switch signal end and a third switch signal input end, the control module further includes a first switch signal input end, a second switch signal end and a third switch signal input end, the first switch signal input end of the control module is connected with the first end of the first switch, the second switch signal input end of the control module is connected with the first end of the second switch, and the third switch signal input end of the control module is connected with the first end of the third switch; and the second end of the first switch, the second end of the second switch and the second end of the third switch are connected and grounded.
Optionally, the driving circuit of the earphone further includes an indicator light module, the control module further includes a second output end, the controlled end of the indicator light module is connected to the second output end of the control module, and the power end of the indicator light module is connected to the input/output end of the power module.
In order to achieve the above object, the present invention further provides a heart rate earphone, including the driving circuit of the earphone.
The invention provides a driving circuit of an earphone, which comprises a power supply module, a heart rate detection module, a voltage acquisition module, a control module and a power amplifier module, wherein the heart rate detection module detects a heart rate, the voltage acquisition module detects a voltage value of the power supply module, the control module outputs a volume reduction control signal when the heart rate detection module works and the voltage value of the power supply module detected by the voltage acquisition module is smaller than or equal to a preset voltage value, and finally the power amplifier module can adjust the volume output according to the volume control signal to reduce the volume output by the power amplifier module under the condition of insufficient power supply voltage, so that the power supply of the heart rate detection module is ensured, and the heart rate test data of the heart rate detection module is accurate. The problem of inaccurate heart rate earphone heart rate test data among the prior art 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 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 schematic block diagram of a driving circuit of an earphone according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a driving circuit of an earphone according to another embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a driving circuit of the earphone according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only two partial embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a certain two specific postures (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions relating to "second", "plurality", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "second" or "a plurality" may explicitly or implicitly include at least two of that feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a driving circuit of an earphone, which is used for solving the problem of inaccurate heart rate test data of a heart rate earphone so as to ensure that the heart rate test data is accurate.
In an embodiment of the present invention, referring to fig. 1, a driving circuit of an earphone includes a power supply module 101, a heart rate detection module 103, a voltage acquisition module 102, a control module 104 and a power amplifier module 105, where the control module 104 includes a first input end, a second input end and a first output end, and an input/output end V2 of the power supply module 101 is connected with a detection end of the voltage acquisition module 102; the output end of the heart rate detection module is connected with the first input end of the control module 104; a second input end of the control module 104 is connected to an output end of the voltage acquisition module 102, and a first output end of the control module 104 is connected to an input end of the power amplifier module 105.
Wherein, heart rate detection module 103 detects the heart rate, voltage acquisition module 102 detects the voltage value of power module 101, control module 104 is in the signal detection heart rate detection module 103 during operation through the second input, and when the voltage value of the first input power module 101 through control module 104 is less than or equal to predetermined voltage value, output volume turn-down control signal and export to power amplifier module 105 through control module 104's first output, power amplifier module 105 is according to the volume control signal finally, can adjust the volume size of output, realize under the not enough condition of mains voltage, turn down the volume size of power amplifier module 105 output, thereby guarantee heart rate detection module 103's power supply, make the heart rate test data of last heart rate detection module 103 accurate.
In this embodiment, the volume of the power amplifier module 105 may also be reduced when the power module 101 is in a low power state and when the heart rate detection module 103 is in operation, so that the situation of too high volume does not occur. For example, under the condition that the power module 101 is in low power and the heart rate detection module 103 works, if the volume adjustment range is represented by the display grid number, if the user actively increases the volume of one grid of the power amplifier module 105, the volume grid number corresponding to actual adjustment is only half grid or less, in addition, the volume adjustment range at the moment is also provided with an upper limit value according to the voltage value of the power voltage, the upper limit value at the moment is determined according to the voltage value of normal work of the heart rate detection module 103 and the voltage value required by the power amplifier module 105 when the volume values of different sizes are obtained, and intelligent adjustment is performed according to the specific work voltages of the heart rate detection module 103 and the power amplifier module 105. Thereby make after opening heart rate detection module 103, the power consumptive of whole earphone can not increase rapidly, and then can guarantee the stability of the voltage of heart rate detection module 103, guarantee the accuracy of test rhythm of the heart to promote user experience, worth explaining, if the user does not open heart rate detection module 103, then power amplifier module 105's volume control then can not receive the above-mentioned restriction.
Alternatively, referring to fig. 3, the control module 104 is a bluetooth master chip U3.
Wherein, the Bluetooth master chip U3 comprises a first signal exchange pin BT-RF, a first key input pin F4, a second key input pin F3, a third key input pin F2, a fourth key input pin VR, an oscillation signal input pin XTAL-IN, an oscillation signal output pin XTAL-OUT, a first charging pin N, a second charging pin P, a first control signal output pin C1, a first voltage output pin E2, a first voltage input pin E3, a first clock signal output pin E1, a heart rate detection pin F1, a first indicator light control signal output pin LED1, a second indicator light control signal output pin LED2, a second control signal output pin IO, a second clock signal output pin CLK1, a left channel audio signal output pin SPKR-L, a right channel audio signal output pin SPKR-R, a right channel second audio signal input pin MIC-RP, a right channel first audio signal input pin MIC-RN-AS and a BIDC BIAS pin, the first signal exchange pin BT-RF of the Bluetooth main chip U3 is a first input/output terminal of the control module 104, the first, second and third key input pins F4, F3 and F2 of the Bluetooth main chip U3 are third input terminals of the control module 104, the oscillation signal input pin XTAL-IN and the oscillation signal output pin XTAL-OUT of the Bluetooth main chip U3 are second input/output terminals of the control module 104, the first charging pin N and the second charging pin P of the Bluetooth main chip U3 are charging terminals of the control module 104, the first control signal output pin C1, the first voltage output pin E2, the second voltage input pin and the first clock signal output pin E1 of the Bluetooth main chip U3 are second input terminals of the control module 104, the heart rate detection pin F1 of the Bluetooth main chip U3 is a first input terminal of the control module 104, the fourth key input pin BT-RF of the Bluetooth main chip U3 is a first input terminal of the VR switch module 104, the first indicator lamp control signal output pin LED1 and the second indicator lamp control signal output pin LED2 of the Bluetooth main chip U3 are the second output end of the control module 104, the second control signal output pin IO, the second clock signal output pin CLK1, the left channel audio signal output pin SPKR-L and the right channel audio signal output pin SPKR-R of the Bluetooth main chip U3 are the first output end of the control module 104, and the right channel second audio signal input pin MIC-RP, the right channel first audio signal input pin MIC-RN and the DC BIAS voltage pin BIAS of the Bluetooth main chip U3 are the audio input end of the control module 104.
In this embodiment, the signal of the bluetooth master chip U3 is not limited, and all bluetooth chips capable of implementing the functions of the above embodiments may be used. Optionally, the bluetooth master chip U3 is model CSR 8670C.
Optionally, referring to fig. 3, the driving circuit of the headset further includes a crystal oscillator Y1, an input terminal of the crystal oscillator Y1 is connected to the oscillation signal input pin XTAL-IN of the bluetooth main chip U3, and an output terminal of the crystal oscillator Y1 is connected to the oscillation signal output pin XTAL-OUT of the bluetooth main chip U3.
Wherein, the crystal oscillator Y1 provides the operating frequency for the earphone to ensure the earphone to work normally.
Optionally, the driving circuit of the earphone further includes an audio switching module 107 and a first key module 109, the control module 104 further includes a third input end and a first input/output end, the audio switching module 107 obtains an audio signal from the audio terminal, and the input/output end of the audio switching module 107 is connected to the first input/output end of the control module 104; the output end of the first key module 109 is connected with the third input end of the control module 104.
The audio exchange module 107 and the audio terminal transmit audio data, so that normal acquisition of audio information of the whole earphone is ensured, and the audio exchange module 107 outputs audio signals to the audio terminal. In addition, in the first case, the first button module 109 may send a first control signal to the control module 104, thereby turning on/off the heart rate detection module 103. Or, in the second case, the first key module 109 may further send the second control signal to the control module 104, so as to increase the volume output by the power amplifier module 105, and the first key module 109 may also send the third control signal to the control module 104, so as to decrease the volume output by the power amplifier module 105. Alternatively, the first key module 109 implements both the first case and the second case. The setting of the operating condition of above three kinds of button modules can make the more convenient operation bluetooth headset of user, promotes user's experience and feels.
Optionally, the heart rate detection module 103 is a heart rate sensor HR.
At this moment, heart rate sensor HR can choose the miniwatt heart rate test sensor on the market for use, can make things convenient for batch production and reduce the technical degree of difficulty. Optionally, the heart rate sensor HR is model PT 5000.
Optionally, the voltage acquisition module 102 includes a first chip.
The model of the first chip is ADC 0832.
Optionally, in another embodiment, referring to fig. 2, the driving circuit of the headset further comprises an audio capture module 108. The control module 104 further comprises an audio input, and an output of the audio acquisition module 108 is connected to the audio input of the control module 104.
The audio acquisition module 108 acquires an external audio signal, converts the external audio signal into a digital signal, inputs the digital signal into the control module 104, outputs the digital signal to the audio exchange module 107 through the control module 104, and exchanges audio data with a device bound to a corresponding earphone. Thereby further expanding the function of the earphone.
Optionally, the audio capturing module 108 includes a microphone M1, a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2, and the audio capturing module 108 has a dc bias voltage input terminal of the microphone M1 connected to a first terminal of the first inductor L1 and a first terminal of the first capacitor C1, a second terminal of the first inductor L1 connected to a dc bias voltage pin of the bluetooth main chip U3, and a second terminal of the first capacitor C1 connected to the right channel first audio signal input pin MIC-RN of the bluetooth main chip U3. The first end of the second inductor L2 is connected to the audio signal output end of the microphone M1, the second end of the second inductor L2 is connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is connected to the right channel second audio signal input pin MIC-RP of the bluetooth main chip U3.
The microphone M1 is used for acquiring external audio, converting audio vibration signals into audio digital signals, stabilizing the voltage of the audio digital signals through the first inductor L1 and the second inductor L2, and finally outputting stable audio signals to the Bluetooth chip for processing, so that functions of recording, conversation and the like can be realized.
Optionally, the driving circuit of the earphone further includes a second key module 106, the control module 104 further includes a first switch signal input end, and an output end of the second key module 106 is connected to the first switch signal input end of the control module 104.
The second key module 106 mainly plays a role of switching on and off the earphone, and is controlled to be turned on independently, so that the control of a user is facilitated.
Optionally, the second key module 106 includes a first resistor R1 and a fourth switch K4, a first terminal of the first resistor R1 is connected to the first power source V1, a second terminal of the first resistor R1 is connected to a first terminal of the fourth switch K4, and a second terminal of the fourth switch K4 is connected to the fourth key input pin VR of the bluetooth chip.
When the fourth switch K4 is turned on, the bluetooth master chip U3 obtains a start signal with the first power voltage, so that the bluetooth master chip U3 starts to operate.
Optionally, the power amplifier module 105 includes a second chip U2, a first player LS1 and a second player RS1, the first output terminal of the control module 104 includes a first right channel output terminal and a first left channel output terminal, the control module 104 further includes a first clock signal output terminal and a first control signal output terminal, the second chip U2 includes an enable pin and a clock signal input pin, a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin, the enable pin of the second chip U2 is connected to the first control signal output terminal of the control module 104, the clock signal input pin of the second chip U2 is connected to the first clock signal output terminal of the control module 104, the first signal input pin of the second chip U2 is connected to the first right channel output terminal of the control module 104, the second signal input pin of the second chip U2 is connected to the first left channel output terminal of the control module 104, the first signal output pin of the second chip U2 is connected to the input terminal of the first player LS1, and the second signal output pin of the second chip U2 is connected to the input terminal of the second player RS 1.
After the enable pin of the second chip U2 obtains the second control signal or the third control signal output by the bluetooth chip, the volume of the signals input through the first signal input pin and the second signal input pin of the second chip U2 is modulated, specifically, when the enable pin obtains the second control signal, the volume output through the first signal output pin and the second signal output pin is increased, and when the enable pin obtains the third control signal, the volume output through the first signal output pin and the second signal output pin is decreased.
Alternatively, the second chip U2 may be the OPA1612 or the OPA 1622.
The OPA1612 may be employed, among other things, to facilitate operation of the second chip U2 at low power consumption or normal levels. It is essentially off at low power, i.e. when it consumes less than 5 mA. Therefore, the client can enable the operational amplifier to be in a completely closed or opened state, and can conveniently carry out enabling control.
Optionally, the audio exchange module 107 comprises AN antenna RF1, a first inductor L1, and a filter AN, and the control module 104 further comprises a fifth input, AN input/output of the antenna RF1 is connected to a first terminal of the first inductor L1, AN input of the filter AN is connected to a second terminal of the first inductor L1, and AN output of the filter AN is connected to the fifth input of the control module 104.
The first inductor L1 and the filter AN disposed between the antenna RF1 and the control module 104 can better filter out noise interference.
Optionally, the first key module 109 includes a first switch K1, a second switch K2, and a third switch K3, the control module 104 further includes a first switch K1 signal input terminal, a second switch K2 signal terminal, and a third switch K3 signal input terminal, the first switch K1 signal input terminal of the control module 104 is connected to the first terminal of the first switch K1, the second switch K2 signal input terminal of the control module 104 is connected to the first terminal of the second switch K2, and the third switch K3 signal input terminal of the control module 104 is connected to the first terminal of the third switch K3; the second terminal of the first switch K1, the second terminal of the second switch K2 and the second terminal of the third switch K3 are connected and grounded.
At this time, the first switch K1, the second switch K2, and the third switch K3 may implement functions such as volume pause, volume down, volume up, and the like, and specific adjusting functions may be set according to actual needs. In addition, the first switch K1, the second switch K2 and the third switch K3 may be configured as a slide rheostat, etc., and the effect of controlling the corresponding adjustment by the bluetooth master chip U3 may be determined according to the specific configuration of the switches.
Optionally, the driving circuit of the earphone further includes an indicator light module 110, the control module 104 further includes a second output terminal, the controlled terminal of the indicator light module 110 is connected to the second output terminal of the control module 104, and the power supply terminal V5 of the indicator light module 110 is connected to the input/output terminal V2 of the power supply module 101.
The indicator light module 110 is used to indicate the normal working state of the earphone, for example, when the electric quantity is insufficient, a red light is lighted, and when the electric quantity is sufficient, a green light is lighted. The indicator light module 110 may be provided with a plurality of LED lights and controlled by the bluetooth main chip U3, such as the first light emitting diode D1 and the second light emitting diode D2 shown in fig. 3, respectively.
Optionally, the power module 101 includes a first battery pack B1, a second battery pack B2, a third capacitor C3, and a fourth capacitor C4, where an anode of the first battery pack B1, an anode of the second battery pack B2, a first end of the third capacitor C3, and a first end of the fourth capacitor C4 are input/output terminals V2 of the power module 101, and a cathode of the first battery pack B1, a cathode of the second battery pack B2, a second end of the third capacitor C3, and a second end of the fourth capacitor C4 are grounded.
Optionally, the driving circuit of the device further includes a USB interface J1, the first charging pin N of the bluetooth master chip U3 is connected to the first transmission pin DN of the USB interface J1, and the second charging pin N of the bluetooth master chip U3 is connected to the first transmission pin DP of the USB interface J1. Thereby realizing the charging of the earphone.
Referring to fig. 1, 2 and 3 together, the operation principle of the driving circuit of the earphone of the present embodiment is specifically described as follows:
when the fourth switch K4 is closed, the bluetooth main chip U3 starts to operate, and the audio signal acquired by the antenna RF1 is processed and then output to the first player LS1 and the second player RS1 through the second chip U2, at this time, if the switch representing turning on the heart rate module in the first key module 109 is turned on, the bluetooth main chip U3 obtains a heart rate module turning on signal and outputs the heart rate module turning on signal to the controlled terminal of the heart rate sensor HR, and at the same time, outputs an enable signal to the first chip to start voltage acquisition on the power module 101. Thereby heart rate sensor HR begins to detect the rhythm of the heart and exports detected signal to bluetooth main chip U3, if this moment, when mains voltage that first chip detected was less than the default, bluetooth main chip U3 output control signal made the audio signal's that second chip U2 exported volume reduce to reduce power consumptively, guarantee heart rate sensor HR's power supply, make heart rate sensor HR's testing result accurate. Further, if the volume needs to be adjusted again, the volume can be adjusted through a key representing the adjustment of the volume in the first key module 109, but the amplitude of the adjustment is only half or even less than that of the adjustment through the same method at ordinary times, the specific relationship can be determined by the control signal output from the bluetooth main chip U3 to the second chip U2, and the change of the control signal is determined by the operating voltage of the heart rate sensor HR, the voltage of the power module 101, and the power consumption of the second chip U2, thereby further ensuring the stability of the operating voltage of the heart rate sensor HR. Optionally, the variation of the control signal may be further adjusted when the microphone M1 has an input, so as to further ensure the stability of the operating voltage of the heart rate sensor HR. So that the result measured by the heart rate sensor HR is accurate. Therefore, the problem that the heart rate test data measured by the existing heart rate earphone is accurate is solved.
In order to achieve the above object, the present invention further provides a heart rate earphone, including the driving circuit of the earphone.
It can be understood that, because the driving circuit of the earphone is used in the heart rate earphone of the present invention, the embodiment of the heart rate earphone of the present invention includes all technical solutions of all embodiments of the driving circuit of the earphone, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A driving circuit of a headphone, comprising:
a power supply module;
the heart rate detection module is used for detecting the heart rate;
the voltage acquisition module is used for detecting the voltage value of the power supply module;
the control module is used for outputting a volume reduction control signal when the heart rate detection module works and the voltage value of the power supply module detected by the voltage acquisition module is smaller than or equal to a preset voltage value;
and the power amplifier module is used for adjusting the output volume according to the volume control signal.
2. The driving circuit of the earphone according to claim 1, wherein the control module comprises a first input terminal, a second input terminal and a first output terminal, and the input/output terminal V2 of the power supply module is connected with the detection terminal of the voltage acquisition module; the output end of the heart rate detection module is connected with the first input end of the control module; the second input end of the control module is connected with the output end of the voltage acquisition module, and the first output end of the control module is connected with the input end of the power amplifier module.
3. The driving circuit of the earphone according to claim 2, wherein the driving circuit of the earphone further comprises an audio switching module and a first key module, the control module further comprises a third input terminal and a first input/output terminal, the audio switching module obtains an audio signal from an audio terminal, and the input/output terminal of the audio switching module is connected with the first input/input terminal of the control module; the output end of the first key module is connected with the third input end of the control module;
the audio exchange module is also used for outputting audio signals to the audio terminal;
the first key module is used for sending a first control signal to the control module so as to turn on/off the heart rate detection module;
and/or the presence of a gas in the gas,
the first key module is used for sending a second control signal to the control module so as to increase the volume output by the power amplification module;
and the first key module is used for sending a third control signal to the control module so as to reduce the volume output by the power amplification module.
4. The driving circuit of the earphone according to claim 2, wherein the heart rate detection module is a heart rate sensor.
5. The driving circuit of the earphone according to claim 2, wherein the voltage acquisition module comprises a first chip, and the model of the first chip is ADC 0832.
6. The driving circuit of the earphone according to claim 2, wherein the power amplifier module comprises a second chip, a first player and a second player, the first output terminal of the control module comprises a first right channel output terminal and a first left channel output terminal, the control module further comprises a first clock signal output terminal and a first control signal output terminal, the second chip comprises an enable pin and a clock signal input pin, a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin, the enable pin of the second chip is connected with the first control signal output terminal of the control module, the clock signal input pin of the second chip is connected with the first clock signal output terminal of the control module, the first signal input pin of the second chip is connected with the first right channel output terminal of the control module, and a second signal input pin of the second chip is connected with a first left sound channel output end of the control module, a first signal output pin of the second chip is connected with an input end of the first player, and a second signal output pin of the second chip is connected with an input end of the second player.
7. The driving circuit of the earphone according to claim 3, wherein the audio exchange module comprises an antenna, a first inductor and a filter, and an input/output terminal of the antenna is connected to a first terminal of the first inductor; the input end of the filter is connected with the second end of the first inductor, and the output end of the filter is connected with the first input/output end of the control module.
8. The driving circuit of the earphone according to claim 3, wherein the first key module comprises a first switch, a second switch and a third switch, the third input terminal of the control module comprises a first switch signal input terminal, a second switch signal input terminal and a third switch signal input terminal, the first switch signal input terminal of the control module is connected with the first terminal of the first switch, the second switch signal input terminal of the control module is connected with the first terminal of the second switch, and the third switch signal input terminal of the control module is connected with the first terminal of the third switch; and the second end of the first switch, the second end of the second switch and the second end of the third switch are connected and grounded.
9. The driving circuit of the earphone according to claim 3, wherein the driving circuit of the earphone further comprises an indicator light module, the control module further comprises a second output terminal, the controlled terminal of the indicator light module is connected with the second output terminal of the control module, and the power terminal of the indicator light module is connected with the input/output terminal of the power module.
10. A heart rate earphone comprising a driving circuit for the earphone according to any one of claims 1-9.
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| CN201811422965.4A CN109361982B (en) | 2018-11-26 | 2018-11-26 | Drive circuit and rhythm of heart earphone of earphone |
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| CN201811422965.4A CN109361982B (en) | 2018-11-26 | 2018-11-26 | Drive circuit and rhythm of heart earphone of earphone |
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| CN109361982A (en) | 2019-02-19 |
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