CN214281640U - Sound directional transmission device - Google Patents
Sound directional transmission device Download PDFInfo
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- CN214281640U CN214281640U CN202120505347.7U CN202120505347U CN214281640U CN 214281640 U CN214281640 U CN 214281640U CN 202120505347 U CN202120505347 U CN 202120505347U CN 214281640 U CN214281640 U CN 214281640U
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Abstract
The utility model discloses a directional propagation device of sound, including audio storage module, digital signal processing module, ultrasonic transducer, host system and the proximity sensor module that connects gradually, host system respectively with digital signal processing module, proximity sensor module electric connection. When a tourist steps on a designated position, the proximity sensor module collects signals and sends the signals to the main control module, the main control module controls the digital signal processing module to perform digital-to-analog conversion, filtering, amplification and ultrasonic modulation on pre-stored audio signals, the audio signals are converted into ultrasonic signals and are emitted to the air through the ultrasonic transducer in a high-directivity mode, under the influence of the nonlinear effect of the air, the sound can be heard in one direction only, and surrounding people can be prevented from being interfered by noise. The utility model discloses circuit structure is simple, application scope is wide.
Description
Technical Field
The utility model relates to a directional technical field of propagating, concretely relates to sound directional propagation device.
Background
Along with the development of the times and the progress of society, people pay more and more attention to landscape construction and cultural construction of parks, and music elements in the parks are popular among many tourists, especially children. Some parks are provided with music steps, people step on the steps as if pressing keys one by one, and the interesting music steps attract a lot of people. The music steps bring joy to tourists and also create some troubles, children gather together for jumping play, and as the sound is spread all around and cannot be oriented, the sounds of different steps are mixed together and are disordered, the tourists on other steps cannot relax and enjoy quietly, and even can bring noise influence to the tourists at far away; moreover, the music steps are usually provided with a single key tone for each step, and are relatively boring.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a sound directional propagation device when the visitor reaches the assigned position, has realized the directional propagation of music, has avoided producing noise jamming to other visitors.
The utility model provides a sound directional transmission device, which comprises an audio storage module, a digital signal processing module and an ultrasonic transducer which are connected in sequence; the device also comprises a main control module and a proximity sensor module, wherein the main control module is electrically connected with the digital signal processing module and the proximity sensor module respectively;
the proximity sensor module comprises an emitting unit, a receiving unit and an amplifying unit, wherein the emitting unit is used for emitting detection light, the receiving unit is used for receiving the light reflected by the detection light and converting the light into an electric signal, and the amplifying unit is used for amplifying the electric signal; the emitting unit comprises a first resistor and a light emitting diode, wherein the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is grounded; the receiving unit comprises a second resistor and a first photosensitive diode, the amplifying unit comprises a first operational amplifier, a third resistor, a fourth resistor and a second photosensitive diode, and the third resistor is a slide rheostat; the first end of the second resistor is connected with the power supply, the second end of the second resistor is connected with the anode of the first photosensitive diode, and the cathode of the first photosensitive diode is grounded; the second end of the second resistor is also connected with the non-inverting input end of the first operational amplifier, the inverting input end of the first operational amplifier is connected with the sliding end of the sliding rheostat, the first fixed end of the sliding rheostat is connected with the power supply, and the second fixed end of the sliding rheostat is grounded; the output end of the first operational amplifier is connected with the main control module; the output end of the first operational amplifier is also connected with the first end of a fourth resistor, the second end of the fourth resistor is connected with the cathode of a second photosensitive diode, and the anode of the second photosensitive diode is grounded.
Preferably, the model of the first operational amplifier is LM 324.
Preferably, the digital signal processing module includes a digital-to-analog conversion unit, a filtering unit, a power amplifying unit and an ultrasonic modulation unit which are connected in sequence, an input end of the digital-to-analog conversion unit is connected with an output end of the audio storage module, and an output end of the ultrasonic modulation unit is connected with an input end of the ultrasonic transducer.
Preferably, the filtering unit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a second operational amplifier, a first end of the fifth resistor is connected to the digital-to-analog converting unit, a second end of the fifth resistor is connected to a first end of the first capacitor, a second end of the first capacitor is connected to a first end of the second capacitor, and a second end of the second capacitor is connected to a first inverting input end of the second operational amplifier; the first non-inverting input end of the second operational amplifier is connected with the first end of the sixth resistor, and the second end of the sixth resistor is grounded; the second end of the first capacitor is also connected with the first end of the third capacitor and the first end of the seventh resistor respectively, the second end of the third capacitor is connected with the first output end of the second operational amplifier, and the second end of the seventh resistor is grounded; the first inverting input end of the second operational amplifier is also connected with the first end of the eighth resistor, and the second end of the eighth resistor is connected with the first output end of the second operational amplifier;
the first output end of the second operational amplifier is also connected with the first end of a ninth resistor, the second end of the ninth resistor is connected with the first end of a tenth resistor, the second end of the tenth resistor is connected with the second inverting input end of the second operational amplifier, the second non-inverting input end of the second operational amplifier is connected with the first end of an eleventh resistor, and the second end of the eleventh resistor is grounded; the second end of the ninth resistor is also connected with the first end of the twelfth resistor and the first end of the fourth capacitor respectively, the second end of the twelfth resistor is connected with the second output end of the second operational amplifier, and the second end of the fourth capacitor is grounded; the second inverting input end of the second operational amplifier is also connected with the first end of a fifth capacitor, and the second end of the fifth capacitor is connected with the second output end of the second operational amplifier; the second output end of the second operational amplifier is also connected with the power amplification unit.
Preferably, the digital-to-analog conversion unit adopts a digital-to-analog conversion chip with the model of LTC 2624.
Preferably, the power amplification unit adopts a high-power audio amplification integrated circuit with the model number LM3886 TF.
Preferably, the ultrasonic transducer is a piezoelectric ultrasonic transducer.
Preferably, the main control module adopts a single chip microcomputer with the model number stm 32.
The utility model has the advantages that: when a tourist steps on a designated position, the proximity sensor module collects signals and sends the signals to the main control module, the main control module controls the digital signal processing module to perform digital-to-analog conversion, filtering, amplification and ultrasonic modulation on pre-stored audio signals, the audio signals are converted into ultrasonic signals and are emitted to the air through the ultrasonic transducer in a high-directivity mode, under the influence of the nonlinear effect of the air, the sound can be heard in one direction only, and surrounding people can be prevented from being interfered by noise. Just the utility model discloses circuit structure is simple, application scope is wide.
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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a circuit diagram of a proximity sensor module according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a filtering unit according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1, the embodiment of the utility model provides a directional propagation device of sound, including audio frequency storage module, digital signal processing module, ultrasonic transducer, host system and the proximity sensor module that connects gradually, host system respectively with digital signal processing module, proximity sensor module electric connection, host system adopts the model to be stm 32's singlechip, and ultrasonic transducer is piezoelectricity ultrasonic transducer. In which piezoelectric ultrasonic transducers are arranged in a 10 x 10 array to direct signals into the air. When the tourist is in the straight line of the transmitting port of the ultrasonic transducer, the tourist can hear the sound emitted by the directional transmission device. The power of the ultrasonic wave can be set according to the actual distance, and the audio storage module can store corresponding audio.
Through the embodiment of the utility model discloses a directional propagation device of sound makes sound can only be heard by the people in specific position, and people around can avoid noise interference. The sound directional transmission device is arranged at each appointed position, the content stored by each sound directional transmission device can be different, people can select favorite programs to enjoy the programs, and the favorite programs are not interfered with each other.
The proximity sensor module comprises an emitting unit, a receiving unit and an amplifying unit, wherein the emitting unit is used for emitting detection light, the receiving unit is used for receiving the light reflected by the detection light and converting the light into an electric signal, and the amplifying unit is used for amplifying the electric signal. As shown in fig. 2, the emitting unit includes a resistor R1 and a light emitting diode D1, a first terminal of the resistor R1 is connected to the power supply, a second terminal of the resistor R1 is connected to the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is grounded. The receiving unit comprises a resistor R2 and a photosensitive diode D2, the amplifying unit comprises an operational amplifier U1, a resistor R3, a resistor R4 and a photosensitive diode D3, and the resistor R3 is a slide rheostat. The first end of the resistor R2 is connected with a power supply, the second end of the resistor R2 is connected with the anode of the photosensitive diode D2, and the cathode of the photosensitive diode D2 is grounded. The second end of the resistor R2 is also connected with the non-inverting input end of the operational amplifier U1, the inverting input end of the operational amplifier U1 is connected with the sliding end of the sliding rheostat, the first fixed end of the sliding rheostat is connected with a power supply, and the second fixed end of the sliding rheostat is grounded. The output end of the operational amplifier U1 is connected with the main control module. The output end of the operational amplifier U1 is further connected with the first end of the resistor R4, the second end of the resistor R4 is connected with the cathode of the photodiode D3, and the anode of the photodiode D3 is grounded.
In this embodiment, the operational amplifier U1 is of type LM 324. The emitting unit emits a light beam to the target, and in the present embodiment, the light emitting diode D1 is used to emit the light beam, and in other embodiments, a laser diode is used to emit the light beam. The light beam is reflected by the detection target and then received by the receiving unit, in the embodiment, the receiving unit adopts a photosensitive diode for receiving, in other embodiments, a phototriode can be adopted for receiving the reflected light beam, and an optical element lens or an aperture is arranged in front of the receiving unit. The amplifying unit is used for amplifying the electric signal and sending the electric signal to the main control module.
The digital signal processing module comprises a digital-to-analog conversion unit, a filtering unit, a power amplifying unit and an ultrasonic modulation unit which are sequentially connected, wherein the input end of the digital-to-analog conversion unit is connected with the output end of the audio storage module, and the output end of the ultrasonic modulation unit is connected with the input end of the ultrasonic transducer. As shown in fig. 3, the filtering unit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, and an amplifier U2, a first end of the resistor R5 is connected to the digital-to-analog conversion unit, a second end of the resistor R5 is connected to a first end of the capacitor C1, a second end of the capacitor C1 is connected to a first end of the capacitor C2, and a second end of the capacitor C2 is connected to a first inverting input terminal of the amplifier U2. The first non-inverting input of the amplifier U2 is connected to a first terminal of a resistor R6, and a second terminal of the resistor R6 is connected to ground. The second end of the capacitor C1 is further connected to the first end of the capacitor C3 and the first end of the resistor R7, respectively, the second end of the capacitor C3 is connected to the first output terminal of the amplifier U2, and the second end of the resistor R7 is grounded. The first inverting input of the amplifier U2 is also connected to a first terminal of a resistor R8, and a second terminal of the resistor R8 is connected to a first output of the amplifier U2. The power supply of the amplifier U2 is connected with a +12V power supply, and the +12V power supply is grounded through a capacitor C4. The ground of the amplifier U2 is connected to a-12V power supply, and the-12V power supply is connected to ground through a capacitor C5. The first output end of the amplifier U2 is further connected with the first end of the resistor R9, the second end of the resistor R9 is connected with the first end of the resistor R10, the second end of the resistor R10 is connected with the second inverting input end of the amplifier U2, the second non-inverting input end of the amplifier U2 is connected with the first end of the resistor R11, and the second end of the resistor R11 is grounded. The second end of the resistor R9 is further connected to the first end of the resistor R12 and the first end of the capacitor C6, respectively, the second end of the resistor R12 is connected to the second output end of the amplifier U2, and the second end of the capacitor C6 is grounded. The second inverting input terminal of the amplifier U2 is further connected to the first terminal of the capacitor C7, the second terminal of the capacitor C7 is connected to the second output terminal of the amplifier U2, and the second output terminal of the amplifier U2 is further connected to the power amplification unit.
The digital-to-analog conversion unit adopts a digital-to-analog conversion chip with the model of LTC2624, the power amplification unit adopts a high-power audio amplification integrated circuit with the model of LM3886TF, and the ultrasonic modulation module is used for modulating the analog signal into an ultrasonic carrier signal.
To sum up, the embodiment of the utility model discloses a sound directional propagation device, when the visitor steps on the assigned position, proximity sensor module gathers the signal and sends to host system, and host system control digital signal processing module carries out digital analog conversion, filtering, enlargies and ultrasonic modulation to the audio signal of prestore, turns into ultrasonic signal and launches to the air through ultrasonic transducer high directive property in, under the nonlinear effect influence of air, makes sound only hear in a direction. Meanwhile, the amplification factor of the power amplification unit can be set according to actual conditions, so that the sound can be heard only within a specific distance. The embodiment of the utility model discloses a directional propagation of sound device, circuit structure is simple, application scope is wide.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. A sound directional transmission device comprises an audio storage module, a digital signal processing module and an ultrasonic transducer which are connected in sequence; the method is characterized in that: the device also comprises a main control module and a proximity sensor module, wherein the main control module is electrically connected with the digital signal processing module and the proximity sensor module respectively;
the proximity sensor module comprises an emitting unit, a receiving unit and an amplifying unit, wherein the emitting unit is used for emitting detection light, the receiving unit is used for receiving the light reflected by the detection light and converting the light into an electric signal, and the amplifying unit is used for amplifying the electric signal; the emitting unit comprises a first resistor and a light emitting diode, wherein the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is grounded; the receiving unit comprises a second resistor and a first photosensitive diode, the amplifying unit comprises a first operational amplifier, a third resistor, a fourth resistor and a second photosensitive diode, and the third resistor is a slide rheostat; the first end of the second resistor is connected with the power supply, the second end of the second resistor is connected with the anode of the first photosensitive diode, and the cathode of the first photosensitive diode is grounded; the second end of the second resistor is also connected with the non-inverting input end of the first operational amplifier, the inverting input end of the first operational amplifier is connected with the sliding end of the sliding rheostat, the first fixed end of the sliding rheostat is connected with the power supply, and the second fixed end of the sliding rheostat is grounded; the output end of the first operational amplifier is connected with the main control module; the output end of the first operational amplifier is also connected with the first end of a fourth resistor, the second end of the fourth resistor is connected with the cathode of a second photosensitive diode, and the anode of the second photosensitive diode is grounded.
2. A directional sound propagation device as claimed in claim 1, wherein: the model of the first operational amplifier is LM 324.
3. A directional sound propagation device as claimed in claim 1, wherein: the digital signal processing module comprises a digital-to-analog conversion unit, a filtering unit, a power amplifying unit and an ultrasonic modulation unit which are sequentially connected, wherein the input end of the digital-to-analog conversion unit is connected with the output end of the audio storage module, and the output end of the ultrasonic modulation unit is connected with the input end of the ultrasonic transducer.
4. A directional sound propagation device as claimed in claim 3, wherein: the filtering unit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a second operational amplifier, wherein the first end of the fifth resistor is connected with the digital-to-analog conversion unit, the second end of the fifth resistor is connected with the first end of the first capacitor, the second end of the first capacitor is connected with the first end of the second capacitor, and the second end of the second capacitor is connected with the first inverting input end of the second operational amplifier; the first non-inverting input end of the second operational amplifier is connected with the first end of the sixth resistor, and the second end of the sixth resistor is grounded; the second end of the first capacitor is also connected with the first end of the third capacitor and the first end of the seventh resistor respectively, the second end of the third capacitor is connected with the first output end of the second operational amplifier, and the second end of the seventh resistor is grounded; the first inverting input end of the second operational amplifier is also connected with the first end of the eighth resistor, and the second end of the eighth resistor is connected with the first output end of the second operational amplifier;
the first output end of the second operational amplifier is also connected with the first end of a ninth resistor, the second end of the ninth resistor is connected with the first end of a tenth resistor, the second end of the tenth resistor is connected with the second inverting input end of the second operational amplifier, the second non-inverting input end of the second operational amplifier is connected with the first end of an eleventh resistor, and the second end of the eleventh resistor is grounded; the second end of the ninth resistor is also connected with the first end of the twelfth resistor and the first end of the fourth capacitor respectively, the second end of the twelfth resistor is connected with the second output end of the second operational amplifier, and the second end of the fourth capacitor is grounded; the second inverting input end of the second operational amplifier is also connected with the first end of a fifth capacitor, and the second end of the fifth capacitor is connected with the second output end of the second operational amplifier; the second output end of the second operational amplifier is also connected with the power amplification unit.
5. A directional sound propagation device as claimed in claim 3, wherein: the digital-to-analog conversion unit adopts a digital-to-analog conversion chip with the type of LTC 2624.
6. A directional sound propagation device as claimed in claim 3, wherein: the power amplification unit adopts a high-power audio amplification integrated circuit with the model number LM3886 TF.
7. A directional sound propagation device as claimed in claim 1, wherein: the ultrasonic transducer is a piezoelectric ultrasonic transducer.
8. A directional sound propagation device as claimed in claim 1, wherein: the main control module adopts a single chip microcomputer with the model number of stm 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120505347.7U CN214281640U (en) | 2021-03-09 | 2021-03-09 | Sound directional transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120505347.7U CN214281640U (en) | 2021-03-09 | 2021-03-09 | Sound directional transmission device |
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| Publication Number | Publication Date |
|---|---|
| CN214281640U true CN214281640U (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120505347.7U Active CN214281640U (en) | 2021-03-09 | 2021-03-09 | Sound directional transmission device |
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| CN (1) | CN214281640U (en) |
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2021
- 2021-03-09 CN CN202120505347.7U patent/CN214281640U/en active Active
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