CN217011165U - Directional loudspeaker adopting millimeter wave radar induction control - Google Patents
Directional loudspeaker adopting millimeter wave radar induction control Download PDFInfo
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- CN217011165U CN217011165U CN202220762342.7U CN202220762342U CN217011165U CN 217011165 U CN217011165 U CN 217011165U CN 202220762342 U CN202220762342 U CN 202220762342U CN 217011165 U CN217011165 U CN 217011165U
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- wave radar
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Abstract
The utility model relates to a directional loudspeaker adopting millimeter wave radar induction control, which belongs to the technical field of loudspeakers and comprises a sensor, a main control box, a sounding component and an ultrasonic transducer used for receiving Doppler echo signals, wherein a coil used as an electromagnetic conductor is arranged inside a fixed frame, a fixed core supporting sheet is arranged between a magnet and the fixed frame, a voice coil is arranged in the middle of the fixed core supporting sheet, the surface of the coil is electrically connected with a power wire, a main control circuit board is arranged inside the main control box, one end of the sensor is an induction head used for induction, the sensor is electrically connected with the main control box through a data wire, the sensor is a millimeter wave radar, pedestrians can be induced to pass through the sensor below, the sensor is not influenced by ambient light, the ultrasonic transducer is used for reducing the audio noise of the sounding component and receiving the Doppler echo signals, and the sensor is not influenced by the ultrasonic wave emitted by the directional loudspeaker, thereby improving the sensing accuracy.
Description
Technical Field
The utility model relates to the technical field of loudspeakers, in particular to a directional loudspeaker adopting millimeter wave radar induction control.
Background
The loudspeaker is also called a loudspeaker, is a very common electroacoustic transducer, and can be seen in electronic and electrical equipment for producing sound.
The loudspeaker is a transducer for converting an electric signal into an acoustic signal, and the performance of the loudspeaker has great influence on the tone quality; the loudspeaker is the weakest component in the sound equipment, and is the most important component for sound effect, the loudspeaker is various in variety and has large price difference, and audio electric energy enables a cone or a diaphragm to vibrate and generate resonance or resonance with surrounding air through electromagnetic, piezoelectric or electrostatic effect to generate sound.
The prior chinese patent with reference to publication number CN213783579U discloses a directional speaker with induction function, which includes: a housing, an inductor and a directional loudspeaker; the sensor is arranged at the center position in the shell to sense whether a human body exists in a certain distance opposite to the sensor; the directional loudspeaker is composed of a plurality of loudspeakers, and the loudspeakers are arranged in the shell and distributed around the inductor; the directional loudspeaker is in signal connection with the sensor. Through the matching arrangement of the directional loudspeaker and the inductor, the effects that people can play the explanation immediately and people can stop playing the explanation after leaving are achieved, and the public health hidden danger caused by wearing public earphones is avoided.
However, the sensor in the patent application is a human body proximity sensor, and can only be used for sensing whether a human body exists in a certain range or not so as to avoid the influence of a barrier, but the sensor does not have the function of reducing the influence of ultrasonic waves, and when a loudspeaker emits ultrasonic waves, the sensing precision of the sensor is possibly reduced, so that the wrong sensing effect is generated.
SUMMERY OF THE UTILITY MODEL
Utility model is not enough for overcoming the above circumstances, aims at providing a technical scheme that can solve above-mentioned problem.
A directional loudspeaker controlled by millimeter wave radar induction comprises a sensor, a main control box, a sounding component and an ultrasonic transducer used for receiving Doppler echo signals, wherein the sounding component comprises a fixed frame, a magnet and an installation base, a coil used as an electromagnetic conductor is arranged inside the fixed frame, a fixed core supporting sheet is arranged between the magnet and the fixed frame, a voice coil is arranged in the middle of the fixed core supporting sheet, the surface of the coil is electrically connected with a power line, a main control circuit board is arranged inside the main control box, one end of the sensor is an induction head used for induction, the sensor is electrically connected with the main control box through a data connection wire, the sensor is a millimeter wave radar, the ultrasonic transducer is positioned inside the main control box and comprises an acoustic insulating layer and an electrode wire, one end of the electrode wire is connected with an electrode layer, the electrode layer is of a symmetrical structure, and a piezoelectric crystal is arranged between the electrode layers, and a matching layer is arranged at one end of the electrode layer, and a lining sound absorption material is arranged in the ultrasonic transducer.
Furthermore, the surface of the sensor is electrically connected with an induction interface, one end of the master control circuit board is electrically connected with a connection port, one end of the connection port extends to the surface of the master control box, a pedestrian is induced to pass through the lower part by the millimeter wave radar sensor, the millimeter wave radar sensor is used for sensing whether the pedestrian is positioned under the directional loudspeaker, the directional loudspeaker is prevented from being triggered by mistake, the sensor is not influenced by ambient light, the audio noise of the sounding component is reduced by the ultrasonic transducer, the Doppler echo signal is received, the millimeter wave radar sensor is assisted not influenced by ultrasonic waves emitted by the directional loudspeaker, the induction precision is improved, the audio is played by the sounding component, and the CPU controlled by the millimeter wave radar is a PHY6212 Bluetooth 5.0 chip;
the millimeter wave radar can set an induction distance through PHY6212 Bluetooth, so that the configuration of the induction distance is convenient, the communication mode of the millimeter wave radar and the CPU is Uart, and the Uart refers to a Universal Asynchronous Receiver Transmitter (UART) generally;
UART converts the data to be transmitted between serial communication and parallel communication as a device for converting parallel input signal into serial output signal; the embodiments are embodied as a stand-alone modular chip or as a peripheral device integrated into a microprocessor. The standard signal amplitude conversion chip is generally in RS-232C specification, is matched with a standard signal amplitude conversion chip like MAXim's MAX232, and serves as an interface for connecting external equipment;
the UART is a universal serial data bus used for asynchronous communication; the bus is in bidirectional communication, and full duplex transmission and reception can be realized.
Further, fixed frame's surface mounting has the cone that is used for assisting the pronunciation of voice coil loudspeaker voice coil, and the cone is connected with fixed frame through the connecting screw, and the surface connection of cone has the vibrating diaphragm, and the vibrating diaphragm is installed with the cone through solid fixed ring, and the one end of installation base is equipped with the fixed block, and the one end of fixed block is the card post, carries out the position to installation base, magnet and fixed core support piece respectively through the card post and prescribes a limit to, carries out the position through fixed core support piece to the voice coil loudspeaker voice coil and prescribes a limit to.
Furthermore, one end of the data connection wire is an input end, the other end of the data connection wire is an output end, a connection interface used for being connected with the sensor is arranged on the surface of the input end, and the sensor is connected with the main control box through the connection interface and the induction interface.
Furthermore, the surface of the sensor and the surface of the main control box are both provided with heat dissipation grooves for auxiliary heat dissipation, and when the sensor and the main control box are connected with a power supply to operate and generate heat, the heat inside the sensor and the main control box is discharged through the heat dissipation grooves.
Furthermore, one end of the power line sequentially penetrates through the surfaces of the main control box and the fixed frame and extends to the surface of the main control circuit board, the main control box is electrically connected with the coil through the power line, and one end of the power line is used for being connected with an external power supply.
Compared with the prior art, the utility model has the beneficial effects that: the sensor can sense that pedestrians pass through the lower part of the sensor, the millimeter wave radar sensor can sense whether the pedestrians are located under the directional loudspeaker, false triggering of the directional loudspeaker is avoided, the sensor is not influenced by ambient light, audio noise of the sounding assembly is reduced and Doppler echo signals are received through the ultrasonic transducer, and therefore the millimeter wave radar sensor is assisted not to be influenced by ultrasonic waves emitted by the directional loudspeaker, and sensing precision is improved;
the millimeter wave radar has the function of judging the existence of the human body by detecting the movement with the tiny amplitude on the basis of the function of the traditional human body induction radar; therefore, compared with the traditional Doppler radar, the method has the advantages that the existence detection in a certain range is realized, and the effects of higher accuracy and difficulty in missing report are achieved.
Drawings
FIG. 1 is a perspective view of a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 2 is an exploded view of a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 3 is a perspective view of a sensor in a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 4 is another perspective view of a sensor in a directional loudspeaker inductively controlled using millimeter wave radar in accordance with the present invention;
FIG. 5 is a perspective view of a main control box of a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 6 is a perspective view of a main control circuit board in a directional speaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 7 is a perspective view of a data connection in a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 8 is a schematic diagram of the internal structure of an ultrasonic transducer in a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
FIG. 9 is a schematic diagram of the operation of a directional loudspeaker inductively controlled by a millimeter wave radar according to the present invention;
in the figure: 1-sensor, 2-main control box, 3-fixed frame, 4-magnet, 5-mounting base, 6-coil, 7-fixed chip supporting piece, 8-voice coil, 9-power line, 10-main control circuit board, 11-induction head, 12-data wiring, 13-induction interface, 14-connecting port, 15-cone and 16-vibrating diaphragm, 17-fixed ring, 18-fixed block, 19-clamping column, 20-input end, 21-output end, 22-connecting interface, 23-radiating groove, 24-connecting screw, 25-ultrasonic transducer, 26-electrode wire, 27-acoustic insulating layer, 28-electrode layer, 29-piezoelectric crystal, 30-matching layer and 31-backing sound-absorbing material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the present embodiment, please refer to fig. 1-9, a specific implementation of the directional speaker using millimeter wave radar induction control includes a sensor 1, a main control box 2, a sounding component and an ultrasonic transducer 25 for receiving doppler echo signals, the sounding component includes a fixed frame 3, a magnet 4 and an installation base 5, a coil 6 serving as an electromagnetic conductor is disposed inside the fixed frame 3, a fixed core supporting plate 7 is disposed between the magnet 4 and the fixed frame 3, a voice coil 8 is mounted in the middle of the fixed core supporting plate 7, a power line 9 is electrically connected to the surface of the coil 6, a main control circuit board 10 is disposed inside the main control box 2, one end of the sensor 1 is an induction head 11 for performing induction, the sensor 1 is electrically connected to the main control box 2 through a data connection wire 12, the sensor 1 is a millimeter wave radar, the ultrasonic transducer 25 is located inside the main control box 2, ultrasonic transducer 25 includes electrode line 26 and acoustic insulating layer 27, and the one end of electrode line 26 is connected with electrode layer 28, and electrode layer 28 is the symmetrical structure, is equipped with piezoelectric crystal 29 between the electrode layer 28, and matching layer 30 is installed to the one end of electrode layer 28, and ultrasonic transducer 25's inside is equipped with backing sound absorbing material 31.
The surface of the sensor 1 is electrically connected with an induction interface 13, one end of the main control circuit board 10 is electrically connected with a connection port 14, one end of the connection port 14 extends to the surface of the main control box 2, a pedestrian is induced to pass through the lower part by the millimeter wave radar sensor, the millimeter wave radar sensor is used for sensing whether the pedestrian is positioned under the directional loudspeaker, the directional loudspeaker is prevented from being triggered by mistake, the sensor 1 is not influenced by ambient light, the ultrasonic transducer 25 is used for reducing the audio noise of the sounding component and receiving Doppler echo signals, therefore, the millimeter wave radar sensor is assisted not influenced by ultrasonic waves emitted by the directional loudspeaker, the induction precision is improved, the audio is played by the sounding component, and a CPU controlled by the millimeter wave radar is a PHY6212 Bluetooth 5.0 chip;
the millimeter wave radar can set an induction distance through PHY6212 Bluetooth, so that the configuration of the induction distance is convenient, the communication mode of the millimeter wave radar and the CPU is Uart, and the Uart refers to a Universal Asynchronous Receiver Transmitter (UART) generally;
UART converts the data to be transmitted between serial communication and parallel communication as a device for converting parallel input signal into serial output signal; the embodiments are embodied as a stand-alone modular chip or as a peripheral device integrated into a microprocessor. The standard signal amplitude conversion chip is generally in RS-232C specification, is matched with a standard signal amplitude conversion chip like MAXim's MAX232, and serves as an interface for connecting external equipment;
the UART is a universal serial data bus used for asynchronous communication; the bus is in bidirectional communication, and full duplex transmission and reception can be realized.
Fixed frame 3's surface mounting has a cone 15 that is used for assisting 8 pronunciation of voice coil loudspeaker voice coil, cone 15 is connected with fixed frame 3 through connecting screw 24, cone 15's surface connection has vibrating diaphragm 16, vibrating diaphragm 16 installs through solid fixed ring 17 and cone 15, the one end of installation base 5 is equipped with fixed block 18, the one end of fixed block 18 is card post 19, carry out the position to installation base 5, magnet 4 and fixed core support piece 7 respectively through card post 19 and prescribe a limit to, carry out the position through fixed core support piece 7 to voice coil loudspeaker voice coil 8 and prescribe a limit to.
One end of the data connection wire 12 is an input end 20, the other end of the data connection wire 12 is an output end 21, a connection interface 22 used for being connected with the sensor 1 is arranged on the surface of the input end 20, and the connection interface 22 is connected with the induction interface 13, so that the sensor 1 is connected with the main control box 2.
The surface of the sensor 1 and the surface of the main control box 2 are both provided with heat dissipation grooves 23 for auxiliary heat dissipation, and when the sensor 1 and the main control box 2 are connected with a power supply to operate and generate heat, the heat inside the sensor 1 and the main control box 2 is discharged through the heat dissipation grooves 23.
One end of the power line 9 sequentially penetrates through the surfaces of the main control box 2 and the fixed frame 3 and extends to the surface of the main control circuit board 10, the main control box 2 is electrically connected with the coil 6 through the power line 9, and one end of the power line 9 is used for being connected with an external power supply.
When the utility model is used, an external power supply is connected through a power line 9, the sensor 1 and the main control box 2 are connected to run by a power supply, the external environment is induced through the induction head 11, the sensor 1 adopts the most advanced plane antenna based on the Doppler effect, the interference of higher harmonics and other miscellaneous waves can be effectively inhibited, the sensitivity is high, the reliability is high, the safety, the convenience and the intelligent energy-saving effect are realized, when the induction head 11 induces the pedestrians passing below, if the human body moves in a delay time period, the switch is continuously connected until the people leave and delay the time, in addition, when the induction head 11 induces the pedestrians passing below, the induction data of the induction interface 13 is transmitted through the data connection wire 12, so that the main control box 2 and the main control circuit board 10 react to the induction data, and the voice frequency component plays the voice frequency.
When current passes through the coil 6, the coil 6 vibrates along with the frequency of the current, and the coil 6 vibrates while the diaphragm 16 vibrates along with the coil 6, so that the surrounding air is pushed to vibrate, thereby generating sound, and the piezoelectric crystal 29 is used as a basic ultrasonic transduction effect, and ultrasonic signals are transmitted and received by the piezoelectric crystal 29, so that the millimeter wave radar sensor is assisted not to be influenced by ultrasonic waves emitted by the directional loudspeaker.
The foregoing is a more detailed description of the utility model, taken in conjunction with the specific preferred embodiments thereof, and is not intended to limit the utility model to the particular forms disclosed. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as the protection scope of the utility model.
Claims (6)
1. The utility model provides an adopt directional loudspeaker of millimeter wave radar response control, includes sensor, master control case, pronunciation subassembly and is used for receiving the ultrasonic transducer of doppler echo signal which characterized in that: pronunciation subassembly includes fixed frame, magnet and installation base, fixed frame's inside is equipped with the coil that is used for acting as the electromagnetic conductor, be equipped with surely the core piece between magnet and the fixed frame, the mid-mounting of deciding the core piece has the voice coil loudspeaker voice coil, the surperficial electric connection of coil has the power cord, the inside of master control case is equipped with the master control circuit board, the one end of sensor is for being used for carrying out the inductive head that responds to, the sensor carries out electric connection through data wiring and master control case, the sensor is the millimeter wave radar, ultrasonic transducer is located the inside of master control case, ultrasonic transducer includes electrode line and acoustics insulating layer, the one end of electrode line is connected with the electrode layer, the electrode layer is symmetrical structure, be equipped with piezoelectric crystal between the electrode layer, the matching layer is installed to the one end of electrode layer, ultrasonic transducer's inside is equipped with the backing sound absorbing material.
2. The directional loudspeaker inductively controlled by millimeter wave radar as claimed in claim 1, wherein: the surface electric connection of sensor has the response interface, and the one end electric connection of master control circuit board has the connection port, and the one end of connection port extends to the surface of master control case.
3. A directional loudspeaker inductively controlled by millimeter wave radar according to any one of claims 1-2, wherein: fixed frame's surface mounting has the cone that is used for assisting the pronunciation of voice coil loudspeaker voice coil, and the cone is connected with fixed frame through the connecting screw, and the surface connection of cone has the vibrating diaphragm, and the vibrating diaphragm is installed through solid fixed ring and cone, and the one end of installation base is equipped with the fixed block, and the one end of fixed block is for blocking the post.
4. A directional loudspeaker inductively controlled by millimeter wave radar according to any one of claims 1-2, wherein: one end of the data connection wire is an input end, the other end of the data connection wire is an output end, and a connection interface used for being connected with the sensor is arranged on the surface of the input end.
5. A directional loudspeaker inductively controlled by millimeter wave radar according to any one of claims 1-2, wherein: and heat dissipation grooves for auxiliary heat dissipation are arranged on the surface of the sensor and the surface of the main control box.
6. A directional loudspeaker inductively controlled by millimeter wave radar according to any one of claims 1-2, wherein: one end of the power line sequentially penetrates through the surfaces of the main control box and the fixed frame and extends to the surface of the main control circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220762342.7U CN217011165U (en) | 2022-04-02 | 2022-04-02 | Directional loudspeaker adopting millimeter wave radar induction control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220762342.7U CN217011165U (en) | 2022-04-02 | 2022-04-02 | Directional loudspeaker adopting millimeter wave radar induction control |
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| Publication Number | Publication Date |
|---|---|
| CN217011165U true CN217011165U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220762342.7U Active CN217011165U (en) | 2022-04-02 | 2022-04-02 | Directional loudspeaker adopting millimeter wave radar induction control |
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| CN (1) | CN217011165U (en) |
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- 2022-04-02 CN CN202220762342.7U patent/CN217011165U/en active Active
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