CN213462258U - Device capable of switching constant-resistance audio signal and constant-voltage audio signal output - Google Patents
Device capable of switching constant-resistance audio signal and constant-voltage audio signal output Download PDFInfo
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- CN213462258U CN213462258U CN202022364320.9U CN202022364320U CN213462258U CN 213462258 U CN213462258 U CN 213462258U CN 202022364320 U CN202022364320 U CN 202022364320U CN 213462258 U CN213462258 U CN 213462258U
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Abstract
The utility model belongs to the technical field of audio playback equipment technique and specifically relates to a switchable device that hinders audio signal and level pressure audio signal output surely is disclosed, including power module, host system, D class audio power amplifier module, audio output switching module, level pressure audio output module, hinder audio output module surely, power module with the host system electricity is connected, the host system electricity is connected with D class audio power amplifier module, D class audio power amplifier module electricity is connected with audio output switching module, audio output switching module is connected with through the change over switch electricity level pressure audio output module with hinder audio output module surely. Has the advantages that: the switching between the fixed-resistance audio and the fixed-pressure audio can be realized, the switching device can be used for playing the sound with low sound pressure and short propagation distance, can also be used for playing the broadcast with high sound pressure and long propagation distance, has wide application range and multiple functions, and saves the investment cost.
Description
Technical Field
The utility model belongs to the technical field of audio playback equipment technique and specifically relates to a changeable decide device that hinders audio signal and level pressure audio signal output.
Background
In some special occasions, such as places with dense residents, such as cities, the fixed-resistance sound boxes (loudspeakers) are close in propagation distance, are suitable for small-interval and multi-distribution, and are usually used for playing non-emergency broadcast information, such as information for searching people and finding objects, or warm prompts and the like, the sound volume is not too large, and the distribution is dense, so that the effect of not disturbing residents and being pleasant to the ears is achieved. However, if the speaker has the function of emergency notification, such as fire, earthquake, flood, and war, the speaker with fixed resistance is still used, especially in outdoor environments such as residential areas and rural areas, the speaker with fixed resistance has large investment, complicated circuit, inconvenient maintenance, and most importantly, the speaker has short propagation distance, and the function of emergency notification is limited.
SUMMERY OF THE UTILITY MODEL
The present invention provides a switchable device for outputting a constant-voltage audio signal and a constant-resistance audio signal to solve the above problems.
The technical scheme of the utility model is realized like this:
the utility model provides a changeable hinder device of audio signal and level pressure audio signal output surely, includes power module, host system, D class audio power amplifier module, audio output switch module, level pressure audio output module, hinders audio output module surely, power module with the host system electricity is connected, the host system electricity is connected with D class audio power amplifier module, D class audio power amplifier module electricity is connected with audio output switch module, audio output switch module is connected with through the change over switch electricity level pressure audio output module with hinder audio output module surely.
Further, the output power supply of the power supply module is 5V-12V.
Further, the main control module is an MCU singlechip, and the model of the main control module is TPA3116D 2.
Furthermore, the audio output switching module is connected with the constant-resistance audio output module through a normally closed contact of a change-over switch, and the audio output switching module is connected with the constant-voltage audio output module through a normally open contact of the change-over switch.
Furthermore, the constant-resistance audio output module is a woofer, the sound pressure level of the constant-resistance audio output module is lower than 100db, the constant-pressure audio output module is a tweeter, and the sound pressure level of the constant-pressure audio output module is not less than 120 db.
Furthermore, the main control module is electrically connected with a network connection module.
By adopting the technical scheme, the beneficial effects of the utility model are that: the switching between the fixed-resistance audio and the fixed-pressure audio can be realized, the switching device can be used for playing the sound with low sound pressure and short propagation distance, can also be used for playing the broadcast with high sound pressure and long propagation distance, has wide application range and multiple functions, and saves the investment cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a block diagram of the system of the present invention;
fig. 2 is a circuit diagram of the present invention;
fig. 3 is a circuit diagram of the class D audio power amplifier module of the present invention.
The reference numerals are explained below:
1. a power supply module; 2. a main control module; 3. a network connection module; 4. a class D audio power amplifier module; 5. an audio output switching module; 6. a constant-voltage audio output module; 7. and a fixed-impedance audio output module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, a device capable of switching between constant-impedance audio signal and constant-voltage audio signal output comprises a power module 1, a main control module 2, a class D audio power amplifier module 4, an audio output switching module 5, a constant-voltage audio output module 6, and a constant-impedance audio output module 7, wherein the power module 1 is electrically connected to the main control module 2, the power module 1 is used for supplying power, the main control module 2 is used for processing signals, the main control module 2 is electrically connected to the class D audio power amplifier module 4, the class D audio power amplifier module 4 is used for performing class D power amplification on audio, the class D audio power amplifier module 4 is electrically connected to the audio output switching module 5, and the audio output switching module 5 is used for switching audio output circuits, thereby controlling the audio output from the constant-voltage audio output module 6 or the constant-resistance audio output module 7, and the audio output switching module 5 is electrically connected with the constant-voltage audio output module 6 and the constant-resistance audio output module 7 through a change-over switch.
In this embodiment, the output power of the power module 1 is 5V-12V.
In this embodiment, the main control module 2 is an MCU single chip microcomputer, and the model of the main control module 2 is TPA3116D 2.
In this embodiment, the audio output switching module 5 is connected to the constant-resistance audio output module 7 through a normally closed contact of the change-over switch, and the audio output switching module 5 is connected to the constant-voltage audio output module 6 through a normally open contact of the change-over switch.
In this embodiment, the constant-resistance audio output module 7 is a woofer, the sound pressure level of the constant-resistance audio output module 7 is lower than 100db, the constant-pressure audio output module 6 is a tweeter, and the sound pressure level of the constant-pressure audio output module 6 is not lower than 120 db.
In this embodiment, the main control module 2 is electrically connected to the network connection module 3, and the network connection module may transmit the control instruction and the audio information by using a network signal.
The utility model discloses a theory of operation does: during the use, normally use hinders audio output module 7 broadcast low decibel audio frequency surely, when the alarm information that transmission distance is far away needs to be issued, send switching instruction to host system 2 through the control cabinet, when receiving network or frequency modulation signal's instruction, host system 2 control audio output switching module 5 work makes contact 1 and contact 2, contact 4 and contact 5 disconnection, then contact 1 and contact 3, contact 4 and contact 6 contact realize the conversion of circuit, then the audio frequency is broadcast away from level pressure audio output module 6, produce the high decibel, the sound that transmission distance is far away.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A switchable constant impedance audio signal and constant voltage audio signal output device is characterized in that: including power module (1), host system (2), D class audio power amplifier module (4), audio output switch module (5), level pressure audio output module (6), hinder audio output module (7) surely, power module (1) with host system (2) electricity is connected, host system (2) electricity is connected with D class audio power amplifier module (4), D class audio power amplifier module (4) electricity is connected with audio output switch module (5), audio output switch module (5) are connected with through the change over switch electricity level pressure audio output module (6) with hinder audio output module (7) surely.
2. The apparatus of claim 1, wherein the switchable fixed impedance audio signal and fixed voltage audio signal output device comprises: the output power supply of the power supply module (1) is 5-12V.
3. The apparatus of claim 1, wherein the switchable fixed impedance audio signal and fixed voltage audio signal output device comprises: the main control module (2) is an MCU singlechip, and the model of the main control module (2) is TPA3116D 2.
4. The apparatus of claim 1, wherein the switchable fixed impedance audio signal and fixed voltage audio signal output device comprises: the audio output switching module (5) is connected with the constant-resistance audio output module (7) through a normally closed contact of a change-over switch, and the audio output switching module (5) is connected with the constant-pressure audio output module (6) through a normally open contact of the change-over switch.
5. The apparatus of claim 1, wherein the switchable fixed impedance audio signal and fixed voltage audio signal output device comprises: the constant-resistance audio output module (7) is a woofer, the sound pressure level of the constant-resistance audio output module (7) is lower than 100db, the constant-pressure audio output module (6) is a tweeter, and the sound pressure level of the constant-pressure audio output module (6) is not less than 120 db.
6. The apparatus of claim 1, wherein the switchable fixed impedance audio signal and fixed voltage audio signal output device comprises: the main control module (2) is electrically connected with a network connection module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022364320.9U CN213462258U (en) | 2020-10-22 | 2020-10-22 | Device capable of switching constant-resistance audio signal and constant-voltage audio signal output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022364320.9U CN213462258U (en) | 2020-10-22 | 2020-10-22 | Device capable of switching constant-resistance audio signal and constant-voltage audio signal output |
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| CN213462258U true CN213462258U (en) | 2021-06-15 |
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| CN202022364320.9U Active CN213462258U (en) | 2020-10-22 | 2020-10-22 | Device capable of switching constant-resistance audio signal and constant-voltage audio signal output |
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