Earphone based on Internet of Things

Abstract

The utility model relates to the field of music playing equipment, and provides an internet of things earphone, which comprises a main control module, a power supply module, an LORA wireless communication module and an audio output module, the power supply end of the main control module is connected with the power supply module, the communication end of the main control module is connected with the LORA wireless communication module so as to receive audio signals through an LORA wireless network, and the audio output module is connected with the LORA wireless communication module. The output end of the main control module is connected with the audio output module, the LORA wireless communication module comprises a first LORA chip, a first antenna, a filtering module and an amplification module, the input end of the filtering module is connected with the first antenna, the output end of the filtering module is connected with the input end of the amplification module, and the output end of the amplification module is connected with the output end of the main control module. The output end of the amplification module is connected with the receiving end of the first LORA chip, and the communication end of the first LORA chip is connected with the main control module; the earphone provided by the utility model is wider in receiving range and strong in applicability.

Description

Technical Field

[0001] The utility model relates to the field of music playing equipment, and in particular to an Internet of Things headset. Background Art

[0002] With the development of society, the demand for square dancing among the middle-aged and elderly is increasing. However, the use of speakers in square dancing has caused more and more noise disturbances. Therefore, many square dance teams use headphones to receive audio information to avoid the phenomenon of public noise disturbances caused by speakers. However, most existing headphones use Bluetooth as a wireless communication method, and the receiving distance of such headphones is short, which cannot meet the wide range of audio reception requirements in square dancing. Utility Model Content

[0003] The problem solved by the utility model is how to provide an Internet of Things headset with a wider receiving range.

[0004] To solve the above problems, the utility model provides an Internet of Things headset, including: a main control module, a power module, a LORA wireless communication module and an audio output module, the power end of the main control module is connected to the power module, and the communication end is connected to the LORA wireless communication module to receive an audio signal through the LORA wireless network, the output end of the main control module is connected to the audio output module, the LORA wireless communication module includes a first LORA chip, a first antenna, a filtering module and an amplifying module, the input end of the filtering module is connected to the first antenna, the output end is connected to the input end of the amplifying module, the output end of the amplifying module is connected to the receiving end of the first LORA chip, and the communication end of the first LORA chip is connected to the main control module.

[0005] Furthermore, the filtering module includes a Π-shaped filtering circuit and a first coupling circuit, the input end of the Π-shaped filtering circuit is connected to the antenna, and the output end is connected to the amplification module via the first coupling circuit.

[0006] Furthermore, the Π-shaped filter circuit includes a first inductor, and a first capacitor and a second capacitor respectively arranged between two ends of the first inductor and the ground.

[0007] Furthermore, the amplification module includes a low-noise pre-amplification circuit and a high-gain post-amplification circuit.

[0008] Furthermore, the amplification module also includes a frequency selection circuit, the input end of the frequency selection circuit is connected to the output end of the pre-stage amplifier circuit, the output end is connected to the input end of the post-stage amplifier circuit, and the output end of the post-stage amplifier circuit is connected to the receiving end of the first LORA chip.

[0009] Furthermore, the pre-amplifier circuit includes a first transistor, the first lead of the base of the first transistor is connected to the filter module, the second lead is connected to the power supply via the first resistor, the third lead is grounded via the second resistor, the emitter of the first transistor is grounded, and the drain is connected to the power supply via the second inductor.

[0010] Furthermore, the frequency selection circuit includes a third inductor, a fourth inductor, a third capacitor and a fourth capacitor, the first end of the third inductor is connected to the pre-stage amplifier circuit, the second end is connected to the first end of the third capacitor, the second end of the third capacitor is connected to the post-stage amplifier circuit, the first end of the fourth capacitor is connected to the first end of the third inductor, the second end is grounded, the first end of the fourth inductor is connected to the second end of the third capacitor, and the second end is grounded.

[0011] Furthermore, the post-stage amplifier circuit includes a first amplifier and a fifth inductor, the power supply terminal of the first amplifier is connected to the power supply, the input terminal is connected to the output terminal of the frequency selection circuit, the output terminal is connected to the receiving end of the first LORA chip, and the fifth inductor is arranged between the power supply terminal and the input terminal of the first amplifier.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model adopts the LORA wireless network as the audio receiving network of the headset. In the LORA wireless communication module, a filtering module is used to ensure the stability of the wirelessly received audio signal, and an amplification module is used to increase the signal gain and improve the dynamic range of the LORA chip, thereby ensuring the overall receiving distance to meet a wide range of audio reception needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall principle structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the principle structure of the LORA wireless communication module of the utility model embodiment;

[0016] Figure 3 This is a schematic diagram of the principle structure of the amplification module of the embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the principle structure of the filter module of the embodiment of the utility model;

[0018] Figure 5 This is a schematic diagram of the principle structure of the pre-amplifier circuit of the embodiment of the utility model;

[0019] Figure 6 This is a schematic diagram of the principle structure of the frequency selection circuit of the embodiment of the utility model;

[0020] Figure 7The figure is a schematic diagram of the principle structure of the rear-stage amplifier circuit of the embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1-main control module; 2-power module; 3-LORA wireless communication module; 4-audio output module; 31-first LORA chip; 32-first antenna; 33-filter module; 34-amplifier module; 341-pre-amplifier circuit; 342-frequency selection circuit; 343-post-amplifier circuit. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0026] like Figure 1As shown, the utility model provides an Internet of Things headset, including: a main control module 1, a power module 2, a LORA wireless communication module 3 and an audio output module 4, the power end of the main control module 1 is connected to the power module 2, and the communication end is connected to the LORA wireless communication module 3 to receive an audio signal through the LORA wireless network, the output end of the main control module 1 is connected to the audio output module 4, the LORA wireless communication module 3 includes a first LORA chip 31, a first antenna 32, a filtering module 33 and an amplifying module 34, the input end of the filtering module 33 is connected to the first antenna 32, the output end is connected to the input end of the amplifying module 34, the output end of the amplifying module 34 is connected to the receiving end of the first LORA chip 31, and the communication end of the first LORA chip 31 is connected to the main control module 1.

[0027] It should be noted that this embodiment uses the LORA wireless network as the audio receiving network of the headset. LORA is a wireless network suitable for one-to-one or one-to-many transmission. Its wireless transmission distance can reach more than 1 km according to the gain. Compared with the transmission distance of tens of meters of Bluetooth or WIFI transmission, it is more suitable for large-scale one-to-many use needs. When used in square dancing, the manager can send the audio signal of the dance music through the LORA wireless sending device. When the user wears this headset, the LORA wireless communication module 3 can receive the audio signal of the dance music at a longer distance and transmit it to the main control module 1. The main control module 1 then plays the audio signal on the headset player through the audio output module 4 to meet the user's use needs.

[0028] At the same time, in the LORA wireless communication module 3, such as Figure 2 As shown, a filtering module 33 is used to ensure the stability of the wirelessly received audio signal, and an amplification module 34 is used to increase the signal gain, improve the dynamic range of the LORA chip, and ensure the overall receiving distance to meet a wide range of audio reception requirements.

[0029] In this embodiment, the main control module 1 can adopt a low-power single-chip microcomputer, such as MSP430; the first LORA chip 31 can adopt a LORA receiving chip of model SX1276.

[0030] In one embodiment of the present invention, Figure 4 As shown, the filtering module 33 includes a Π-shaped filtering circuit and a first coupling circuit. The input end of the Π-shaped filtering circuit is connected to the antenna, and the output end is connected to the amplification module 34 via the first coupling circuit.

[0031] It should be noted that the Π-shaped filter circuit includes a first inductor L1, and a first capacitor C1 and a second capacitor C2 respectively arranged between the two ends of the first inductor and the ground, which are used to filter out noise signals in the audio signal and ensure signal stability. The first coupling circuit includes a coupling capacitor C3, which plays an isolation role.

[0032] In one embodiment of the present invention, Figure 3 As shown, the amplification module 34 includes a low-noise pre-amplification circuit 341, a high-gain post-amplification circuit 343 and a frequency selection circuit 342, the input end of the frequency selection circuit 342 is connected to the output end of the pre-amplification circuit 341, the output end is connected to the input end of the post-amplification circuit 343, and the output end of the post-amplification circuit 343 is connected to the receiving end of the first LORA chip 31. .

[0033] It should be noted that since the filtering circuit will cause insertion loss, the addition of a low-noise pre-stage amplifier circuit 341 can compensate for the loss and improve the noise coefficient of the entire receiver. When receiving, the signal received by the antenna is first amplified by the low-noise pre-stage amplifier circuit 341, and then enters the high-gain post-stage amplifier circuit 343. The external high-gain amplification can improve the receiving range of the LORA chip; the frequency selection circuit 342 can shield signals in unnecessary frequency bands, thereby improving the accuracy of the first LORA chip 31 in identifying the received signal.

[0034] In one embodiment of the present invention, Figure 5 As shown, the pre-stage amplifier circuit 341 includes a first transistor, a first lead of the base of the first transistor is connected to the filter module 33, a second lead is connected to the power supply via a first resistor, a third lead is grounded via a second resistor, an emitter of the first transistor is grounded, and a drain is connected to the power supply via a second inductor.

[0035] It should be noted that, in the pre-stage amplifier circuit 341, the first transistor Q1 and the first resistor R1 and the second resistor R2 amplify the received audio signal, the second inductor L2 can improve the driving capability of the pre-stage amplifier circuit 341, and the output end of the pre-stage amplifier circuit 341 is also connected to the coupling capacitor C5 for isolation between the front and rear stages.

[0036] In one embodiment of the present invention, Figure 6 As shown, the frequency selection circuit 342 includes a third inductor, a fourth inductor, a third capacitor and a fourth capacitor. The first end of the third inductor is connected to the pre-stage amplifier circuit 341, the second end is connected to the first end of the third capacitor, the second end of the third capacitor is connected to the post-stage amplifier circuit 343, the first end of the fourth capacitor is connected to the first end of the third inductor, the second end is grounded, and the first end of the fourth inductor is connected to the second end of the third capacitor, and the second end is grounded.

[0037] It should be noted that the third inductor L3 and the fourth capacitor C4, the third capacitor C3 and the fourth inductor L4 respectively form LC filtering and frequency selection to filter out signals and ensure signal stability.

[0038] In one embodiment of the present invention, Figure 7 As shown, the post-stage amplifier circuit 343 includes a first amplifier and a fifth inductor, the power supply terminal of the first amplifier is connected to the power supply, the input terminal is connected to the output terminal of the frequency selection circuit 342, the output terminal is connected to the receiving end of the first LORA chip 31, and the fifth inductor is arranged between the power supply terminal and the input terminal of the first amplifier.

[0039] It should be noted that the first amplifier uses a high-gain amplifier chip U1 to amplify the received audio signal to improve the receiving range. The model of chip U1 is BGA2874. A power supply filter capacitor C6 is also provided at the power supply of chip U1 to ensure the stability of the power supply of the first amplifier.

[0040] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An IoT headset, characterized in that: include: A main control module (1), a power module (2), a LoRa wireless communication module (3) and an audio output module (4), wherein the power supply end of the main control module (1) is connected to the power supply module (2), and the communication end is connected to the LoRa wireless communication module (3) so as to receive an audio signal through a LoRa wireless network, the output end of the main control module (1) is connected to the audio output module (4), the LoRa wireless communication module (3) comprises a first LoRa chip (31), a first antenna (32), a filtering module (33) and an amplifying module (34), the input end of the filtering module (33) is connected to the first antenna (32), the output end is connected to the input end of the amplifying module (34), the output end of the amplifying module (34) is connected to the receiving end of the first LoRa chip (31), and the communication end of the first LoRa chip (31) is connected to the main control module (1).

2. The IoT headset according to claim 1, characterized in that: The filtering module (33) comprises a Π-shaped filtering circuit and a first coupling circuit; the input end of the Π-shaped filtering circuit is connected to an antenna, and the output end is connected to the amplification module (34) via the first coupling circuit.

3. The IoT headset according to claim 2, characterized in that: The Π-shaped filter circuit includes a first inductor, and a first capacitor and a second capacitor respectively arranged between two ends of the first inductor and the ground.

4. The IoT headset according to claim 1, characterized in that: The amplification module (34) comprises a low-noise front-stage amplification circuit (341) and a high-gain rear-stage amplification circuit (343).

5. The IoT headset according to claim 4, characterized in that: The amplification module (34) further comprises a frequency selection circuit (342), the input end of the frequency selection circuit (342) being connected to the output end of the front-stage amplification circuit (341), the output end of the frequency selection circuit (342) being connected to the input end of the rear-stage amplification circuit (343), and the output end of the rear-stage amplification circuit (343) being connected to the receiving end of the first LORA chip (31).

6. The IoT headset according to claim 5, characterized in that: The pre-amplifier circuit (341) comprises a first transistor, a first lead of a base of the first transistor is connected to the filter module (33), a second lead is connected to a power source via a first resistor, a third lead is grounded via a second resistor, an emitter of the first transistor is grounded, and a drain is connected to a power source via a second inductor.

7. The IoT headset according to claim 6, characterized in that: The frequency selection circuit (342) comprises a third inductor, a fourth inductor, a third capacitor and a fourth capacitor; the first end of the third inductor is connected to the pre-stage amplifier circuit (341), the second end is connected to the first end of the third capacitor, the second end of the third capacitor is connected to the post-stage amplifier circuit (343), the first end of the fourth capacitor is connected to the first end of the third inductor, the second end is grounded, the first end of the fourth inductor is connected to the second end of the third capacitor, and the second end is grounded.

8. The IoT headset according to claim 7, characterized in that: The post-stage amplifier circuit (343) comprises a first amplifier and a fifth inductor, wherein the power supply terminal of the first amplifier is connected to a power supply, the input terminal is connected to the output terminal of the frequency selection circuit (342), the output terminal is connected to the receiving terminal of the first LORA chip (31), and the fifth inductor is arranged between the power supply terminal and the input terminal of the first amplifier.

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