Bone conduction pickup circuit

Abstract

According to the bone conduction pickup circuit disclosed by the utility model, the bone conduction pickup module, the audio amplification module, the control module, the timbre volume adjustment module, the startup and shutdown management module and the power supply module are arranged in a matched manner, so that the bone conduction pickup module is used for replacing a microphone in the prior art for pickup; the bone conduction pickup module picks up sound through vibration during playing of the guitar, the sound can be directly transmitted through the sound box, interference of environmental noise is reduced, and the picked-up sound effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pickup, concretely is a kind of bone conduction pickup circuit. BACKGROUND

[0002] Pickup, also known as monitoring head. Monitoring pickup is used to collect on-site environmental sound and transmit it to the backend device. It is composed of a microphone (microphone) and an audio amplifier circuit. Pickups are generally divided into digital pickups and analog pickups. Digital pickups are sound sensing devices that convert analog audio signals into digital signals and perform corresponding digital signal processing through a digital signal processing system. Analog pickups just use general analog circuits to amplify the sound collected by the microphone.

[0003] Currently, musical instruments that transmit sound through vibration usually use microphones for pickup. Microphones pick up sound through air vibration, and in the process of picking up sound, they will pick up a lot of noise, resulting in poor sound pickup effect. INVENTION CONTENTS

[0004] Therefore, it is necessary to provide a bone conduction pickup circuit to solve the problem of high noise during sound pickup.

[0005] A bone conduction pickup circuit includes a bone conduction pickup module, an audio amplification module, a control module, a tone volume adjustment module, a power management module, and a power module. The signal output end of the bone conduction pickup module is connected to the signal input end of the audio amplification module. The signal output end of the audio amplification module is connected to the control module. The signal output end of the control module is connected to the loudspeaker. The signal output end of the tone volume adjustment module is connected to the signal input end of the control module. The signal output end of the power management module is connected to the control module. The power module is electrically connected to the bone conduction pickup module, the audio amplification module, the control module, the tone volume adjustment module, and the power management module.

[0006] In one embodiment, the bone conduction pickup module includes a pickup unit for picking up external audio signals.

[0007] In one embodiment, the audio amplification module includes an audio amplification unit for amplifying the audio signals obtained by the pickup unit.

[0008] In one embodiment, the control module includes a control unit.

[0009] In one embodiment, the tone volume adjustment module includes a tone adjustment unit and a volume adjustment unit. The signal output ends of the tone adjustment unit and the volume adjustment unit are respectively connected to the signal input end of the control unit.

[0010] In one of the embodiments, the power module comprises a charging management unit and a battery power detection unit, the output end of the charging management unit is connected with the input end of the battery power detection unit, and the signal input end of the battery power detection unit is connected with the control unit.

[0011] In one of the embodiments, the chip model of the charging management unit is ME4057A.

[0012] In one of the embodiments, the bone conduction pickup circuit further comprises an indicator light module, and the signal input end of the indicator light module is connected with the signal output end of the control module.

[0013] The bone conduction pickup circuit has the bone conduction pickup module, the audio amplification module, the control module, the tone volume adjustment module, the power-on / off management module and the power module, and the bone conduction pickup module is used to replace the microphone in the prior art to pick up sound, the bone conduction pickup module picks up sound through vibration, directly transmits sound through the vibration of the sound box, reduces the interference of environmental noise, and makes the picked-up sound better. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a structural schematic diagram of a bone conduction pickup circuit according to an embodiment of the present application;

[0015] Figure 2 FIG. 2 is a circuit diagram of a bone conduction pickup module and an audio amplification module of the bone conduction pickup circuit according to an embodiment of the present application;

[0016] Figure 3 FIG. 3 is a circuit diagram of a control module of the bone conduction pickup circuit according to an embodiment of the present application;

[0017] Figure 4 FIG. 4 is a circuit diagram of a tone volume adjustment module of the bone conduction pickup circuit according to an embodiment of the present application;

[0018] Figure 5 FIG. 5 is a circuit diagram of a power-on / off management module of the bone conduction pickup circuit according to an embodiment of the present application;

[0019] Figure 6 FIG. 6 is a circuit diagram of a charging management unit of the bone conduction pickup circuit according to an embodiment of the present application;

[0020] Figure 7 FIG. 7 is a circuit diagram of a battery power detection unit of the bone conduction pickup circuit according to an embodiment of the present application;

[0021] Figure 8The utility model discloses a bone conduction pickup circuit's indicator lamp module circuit diagram of one embodiment. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious, specific implementation of the utility model is explained in detail below with the accompanying drawings. In the following description, a plurality of specific details are set forth in order to fully understand the utility model. But the utility model can be implemented in many other ways different from the description, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the following disclosed specific embodiments.

[0023] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can exist simultaneously. Conversely, when an element is referred to as being "directly" connected to another element, no intermediate element exists.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] As shown in Figure 1 A bone conduction pickup circuit, comprising a bone conduction pickup module 1, an audio amplification module 2, a control module 3, a tone volume adjustment module 4, a power-on management module 5 and a power module 6, the signal output end of the bone conduction pickup module 1 is connected with the signal input end of the audio amplification module 2, the signal output end of the audio amplification module 2 is connected with the control module 3, the signal output end of the control module 3 is connected with a loudspeaker, the signal output end of the tone volume adjustment module 4 is connected with the signal input end of the control module 3, the signal output end of the power-on management module 5 is connected with the control module 3, and the power module 6 is electrically connected with the bone conduction pickup module 1, the audio amplification module 2, the control module 3, the tone volume adjustment module 4 and the power-on management module 5 respectively.

[0026] As shown in Figure 2 The bone conduction pickup module 1 comprises a pickup unit 11 for picking up external audio signals. The chip model of the pickup unit 11 is UPM01AS. The power module 6 is used for providing power for the bone conduction pickup module 1, the audio amplification module 2, the control module 3, the tone volume adjustment module 4 and the power-on management module 6.

[0027] As shown in Figure 5As shown, the bone conduction pickup is installed on the body of the vibration instrument, when the bone conduction pickup is needed, press the button on the switch management module 5, send the control signal to the control module 3, the control module 3 controls the bone conduction pickup module 1, the audio amplification module 2 and the tone volume adjustment module 4 to start. When playing, the vibration of the body of the instrument will generate the audio signal, the bone conduction pickup module 1 obtains the audio signal through the vibration of the body and sends the obtained audio signal to the audio amplification module 2, the audio amplification module 2 amplifies the audio signal and sends it to the control module 3, the control module 3 is connected with the external speaker or sound box, and the obtained sound box signal is played through the speaker. When the volume or tone needs to be adjusted, the tone and volume can be adjusted through the tone volume adjustment module 4.

[0028] In this way, the bone conduction pickup circuit is set through the cooperation of the bone conduction pickup module 1, the audio amplification module 2, the control module 3, the tone volume adjustment module 4, the switch management module 5 and the power module 6. The bone conduction pickup module 1 is used to replace the microphone in the prior art to pick up sound, the bone conduction pickup module 1 picks up sound through the vibration of the vibration instrument, can directly transmit sound through the vibration of the sound box, reduces the interference of environmental noise, and makes the picked-up sound better.

[0029] As shown in the Figure 2 In one embodiment, the audio amplification module 2 includes an audio amplification unit 21 for amplifying the audio signal obtained by the pickup unit; as shown in the Figure 3 The control module 3 includes a control unit 31.

[0030] In this way, the OUT pin of the pickup unit 11 is connected with the INP pin of the audio amplification unit 21, the OUT pin of the audio amplification unit 21 is connected with the MICIN pin of the control unit 31, and the amplified audio signal is sent into the control unit 31. The chip model of the audio amplification unit 21 is IU8202T. IU8202T is a single-channel high-performance audio driving chip supporting differential input and supporting large dynamic output signal 400mW, which is designed for portable devices with limited circuit board space.

[0031] IU8202T has extremely low static power consumption and extremely low noise. IU8202T adopts single-ended mode output, which can generate output with ground reference when powered by single power supply, thereby saving large-size DC blocking capacitor, saving cost and circuit board space, and reducing the height of the element.

[0032] As shown in the Figure 4As shown, in one embodiment, the timbre and volume adjustment module 4 includes a timbre adjustment unit 41 and a volume adjustment unit 42, and the signal output terminals of the timbre adjustment unit 41 and the volume adjustment unit 42 are respectively connected to the signal input terminal of the control unit 3.

[0033] Thus, the tone adjustment unit 41 includes a first adjustable resistor and a capacitor C8. The second end of the first adjustable resistor is connected to one end of the capacitor C8 and the GPIO_A17 of the control unit 3. The tone is adjusted by changing the resistance value of the first adjustable resistor. Decreasing the resistance makes the sound louder and the high frequencies clearer, while increasing the resistance makes the sound softer and the low frequencies fuller, and sends the control signal to the control unit 3.

[0034] The volume control unit 42 includes a second adjustable resistor and a capacitor C9. The second end of the second adjustable resistor is connected to one end of the capacitor C9 and GPIO_A16 of the control unit 3. By adjusting the second adjustable resistor, the larger the resistance, the greater the resistance when the current flows, thus decreasing the volume. Conversely, the smaller the resistance, the smaller the resistance when the current flows, thus increasing the volume and sending a volume control signal to the control unit 3.

[0035] like Figure 6 and Figure 7 As shown, in one embodiment, the power module 6 includes a charging management unit 61 and a battery power detection unit 62. The output terminal of the charging management unit 61 is connected to the input terminal of the battery power detection unit 62, and the signal input terminal of the battery power detection unit 62 is connected to the control unit 3. The chip model of the charging management unit 61 is ME4057A.

[0036] One end of resistor R6 in battery power detection unit 62 is connected to the VCC pin of charging management unit 61, and the other end of resistor R6 is connected to the GPIO_A30 pin of control unit 3. Battery power detection unit 62 acquires the voltage value of charging management unit 61 in real time and sends it to control unit 3. When the voltage value is lower than a preset threshold, control unit 3 issues a charging control signal, and charging can be performed through the charging interface.

[0037] like Figure 8 As shown, in one embodiment, the bone conduction microphone circuit further includes an indicator light module 7, the signal input terminal of which is connected to the signal output terminal of the control module 3.

[0038] Thus, the indicator module 7 includes multiple indicator lights, such as LED1, LED2, and LED3. LED1 can be used as a power indicator, and LED2 can be used as a connection status indicator.

[0039] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A bone conduction microphone circuit, characterized by: The bone conduction pickup module, the audio amplification module, the control module, the tone volume adjustment module, the power-on / off management module and the power module are connected with each other.

2. A bone conduction microphone circuit according to claim 1, wherein: The bone conduction pickup module comprises a pickup unit for picking up external audio signals.

3. A bone conduction microphone circuit according to claim 2, wherein: The audio amplification module comprises an audio amplification unit for amplifying the audio signals obtained by the pickup unit.

4. A bone conduction microphone circuit according to claim 1, wherein: The control module comprises a control unit.

5. A bone conduction microphone circuit according to claim 4, wherein: The tone volume adjustment module comprises a tone adjustment unit and a volume adjustment unit, and the signal output ends of the tone adjustment unit and the volume adjustment unit are connected with the signal input end of the control unit.

6. A bone conduction microphone circuit according to claim 4, wherein: The power module comprises a charging management unit and a battery power detection unit, the output end of the charging management unit is connected with the input end of the battery power detection unit, and the signal input end of the battery power detection unit is connected with the control unit.

7. A bone conduction microphone circuit according to claim 6, wherein: The chip model of the charging management unit is ME4057A.

8. A bone conduction microphone circuit according to claim 1, wherein: The bone conduction pickup module further comprises an indicator light module, and the signal input end of the indicator light module is connected with the signal output end of the control module.

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