CN210347912U - Mobile sound source positioning device - Google Patents
Mobile sound source positioning device Download PDFInfo
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- CN210347912U CN210347912U CN201920652151.3U CN201920652151U CN210347912U CN 210347912 U CN210347912 U CN 210347912U CN 201920652151 U CN201920652151 U CN 201920652151U CN 210347912 U CN210347912 U CN 210347912U
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Abstract
The utility model discloses a mobile sound source positioning device, which comprises four sound receiving devices, wherein any one sound receiving device comprises a spherical cover and a base, and the spherical cover is fixedly connected with the base through a bracket; a sound receiver, a communication module, a main control module and a power module are arranged in the spherical cover, and the power module and the communication module are respectively and electrically connected with the main control module; the master control module comprises the FPGA module and a PCB, a signal processing circuit is welded on the PCB, the output end of the sound receiver is electrically connected with the signal input end of the signal processing circuit, and the output end of the signal processing circuit is electrically connected with the FPGA module. The device is provided with the spherical structure, so that the sound can be conveniently received, the signal processing circuit is arranged to detect the signal with the specific frequency, and the positioning is more accurate.
Description
Technical Field
The utility model relates to the field of electronic technology, concretely relates to portable sound source positioner.
Background
The sound source positioning technology is a special technology which utilizes acoustics and electronic devices to receive sound waves to determine the position of a sound source, and is also an important military reconnaissance means. Later, with the rise of radar detection technology, sound source positioning technology suffers from cold fall, and in recent years, the radar is more and more vulnerable to attack due to the four threats of electronic interference, anti-radiation missile, low altitude penetration and stealth technology.
The sound is a tool commonly used by human beings and is also a very important means for transmitting and acquiring information, different objects often emit specific sound, the direction of the object can be judged according to the sound emitted by the object, and the existing sound source positioning device usually needs a large number of sound acquisition devices (microphones and the like), so that the volume is large and the portability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the sound source signal and detecting the difficulty, inconvenient problem is corrected in the installation of sound receiving arrangement, has provided a mobile sound source positioner, and the device is through being provided with spherical structure, and the sound of being convenient for is received, sets up the signal that signal processing circuit can detect specific frequency, and the location is more accurate.
In order to achieve the technical purpose, the utility model provides a technical solution that a mobile sound source positioning device comprises four sound receiving devices, wherein any one sound receiving device comprises a spherical cover and a base, and the spherical cover is fixedly connected with the base through a bracket; the spherical cover is internally provided with a sound receiver, a communication module, a main control module and a power module, and the power module and the communication module are respectively and electrically connected with the main control module. In this scheme, sound receiving arrangement sets up to spherical cover structure, can receive the sound signal of all directions, and it is more convenient to install, and host system is used for handling the sound signal who receives, and remote terminal is given with the data that host system handled to communication module, and remote terminal is used for the centralized management and the demonstration of data.
The master control module comprises the FPGA module and a PCB, a signal processing circuit is welded on the PCB, the output end of the sound receiver is electrically connected with the signal input end of the signal processing circuit, and the output end of the signal processing circuit is electrically connected with the FPGA module. In the scheme, the signal processing circuit processes the sound signal received by the sound receiver, the sound signal with specific frequency is obtained through signal amplification, filtering and comparison output, the FPGA processes and stores the signal, the FPGA is a chip with high degree of freedom, is more flexible than a single chip microcomputer on a clock, can be executed in parallel, has certain advantage in speed, and is stronger in anti-interference capacity.
The signal processing circuit comprises a signal amplifying circuit, a filter circuit and a signal comparison circuit; the input end of the signal amplification circuit is electrically connected with the sound receiver, the output end of the signal amplification circuit is electrically connected with the input end of the filter circuit, the output end of the filter circuit is electrically connected with the input end of the signal comparison circuit, and the output end of the signal comparison circuit is electrically connected with the FPGA module. The amplifying circuit comprises a resistor R1, a first end of a resistor R1 is electrically connected with a positive electrode end of the sound receiver KM1, a negative electrode end of the sound receiver KM1 is grounded, a second end of a resistor R1 is electrically connected with a power supply, a first end of a resistor R1 is electrically connected with a first end of a capacitor C1, a second end of the capacitor C1 is electrically connected with a base end of a triode Q1, a base end of a triode Q1 is electrically connected with a first end of a resistor R3, a second end of a resistor R3 is electrically connected with a first end of a capacitor C2, a second end of the capacitor C2 is electrically connected with an input end of a filter circuit, a collector end of a triode Q1 is electrically connected with a first end of a resistor R2, a second end of a resistor R2 is electrically connected with a second end of a resistor R63. In the scheme, the signal received by the sound receiver is small when the signal is not amplified, so that the signal is not easy to detect, the received signal is amplified by the later stage by utilizing a triode, and the change of current in the collector can be converted into the change of voltage through the RC circuit in the circuit and then is sent to the output end.
The filter circuit comprises a resistor R4, a first end of the resistor R4 is electrically connected with an output end of the amplifying circuit, a second end of the resistor R4 is electrically connected with a first end of a capacitor C4, a second end of the capacitor C4 is electrically connected with a reverse input end of an operational amplifier U1, a forward input end of the operational amplifier U1 is electrically connected with a first end of a capacitor C5, a second end of a capacitor C5 is grounded, a first end of a capacitor C5 is electrically connected with a first end of the resistor R8, a second end of a resistor R8 is electrically connected with a power supply, a first end of a resistor R8 is electrically connected with a first end of a resistor R7, a second end of a resistor R7 is electrically connected with a second end of a capacitor C5, a second end of a capacitor CCD is electrically connected with a first end of a resistor R5, a second end of a resistor R5 is electrically connected with a first end of a capacitor C2 point, a second end of a capacitor C2 is electrically connected with a first end of a resistor R59, the first end of the resistor R6 is electrically connected with the output end of the operational amplifier U1, and the output end of the operational amplifier U1 is electrically connected with the output end of the signal comparison circuit. In the scheme, according to the requirement of the sound receiving device, the received signal is ensured to be sent by the sound source module only when the frequency of the received signal is about 500 Hz. The sound signal received by the sound receiver in the sound receiving device is of any frequency, so the post-stage needs to be filtered. The filtering adopts a second-order band-pass filter, the center frequency of the filter is finally 500Hz, the bandwidth is 50Hz through the matching of a capacitor resistor, and the sound signals sent by the sound production module can be filtered out after the signals received by the sound receiver pass through the band-pass filter.
The signal comparison circuit comprises an operational amplifier U2, wherein the reverse input end of the operational amplifier U2 is electrically connected with the output end of the filter circuit, the forward input end of the operational amplifier U2 is electrically connected with the sliding end of the sliding rheostat R10, the first end of the sliding rheostat R10 is connected with a power supply, the second end of the sliding rheostat R10 is grounded, the positive electrode end of the power supply of the operational amplifier U2 is electrically connected with the first end of a capacitor C6, the second end of the capacitor C6 is grounded, the first end of a capacitor C6 is electrically connected with the first end of a resistor R9, the second end of the resistor R9 is electrically connected with the output end of the operational amplifier U2, and the output end of the operational amplifier. In the scheme, a signal filtered by a second-order active band-pass filter is still a sine wave, but the signal is inconvenient for an information processing module FPGA module to process, so a first-order LM324 comparator is added at the rear stage of the filter, the basic function of the comparator is to compare two input voltages, and output a high level or a low level according to a comparison result, and judge the size of the input signal accordingly, the amplitude of the signal output from the band-pass filter is more than 4V, so the comparison voltage given by a comparison end of the comparator is set to be about 1V, and when the output signal is a square wave with the frequency of 500Hz, the amplitude level is a high level, and the FPGA module can be used for detection.
The communication module adopts one of a GPRS module or a GSM module. In the scheme, the GPRS module or the GSM module is adopted based on the characteristics of low power consumption and stable data transmission of the two modules.
The power module adopts one of a dry battery or a lithium battery. In this scheme, adopt dry battery or lithium cell to be based on these two kinds of power supply mode with low costs, it is convenient to change.
The spherical cover is provided with a plurality of uniformly distributed pores on the circumferential surface. In this scheme, be provided with the pore sound signal's of being convenient for receipt of a plurality of evenly distributed on the spherical cover global.
The utility model has the advantages that: 1. in the scheme, four sound receiving devices are arrayed to form a rectangular area, a sound source device is arranged in the rectangular area, a sound receiving module transmits sound signals to an information processing module through a wire, and a sound positioning system can obtain coordinates of a sound source through a relatively perfect algorithm according to the time difference of the sound signals transmitted to the sound receiving modules by the sound source module through air, so that sound source positioning can be carried out; 2. the sound receiving device is provided with a ball star structure with spherical pores, so that the sound is conveniently received; 3. the sound receiving device is internally provided with a signal processing circuit, so that the sound with specific frequency can be identified, and the accuracy of the positioning system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the mobile sound source positioning device of the present invention.
Fig. 2 is a block diagram of a mobile sound source positioning device according to the present invention.
Fig. 3 is a signal amplification circuit diagram of the mobile sound source positioning device of the present invention.
Fig. 4 is a filter circuit diagram of the mobile sound source positioning device of the present invention.
Fig. 5 is a circuit diagram of comparing signals of the sound source localization apparatus of the present invention.
The notation in the figure is: the voice processing system comprises an A-voice receiving device, a 1-voice source device, a 2-voice receiver, a 3-main control module, a 4-signal processing circuit, a 5-FPGA module, a 6-power module, a 7-communication module, a 41-signal amplifying circuit, a 42-filter circuit and a 43-signal comparison circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail with reference to the accompanying drawings and examples, it should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and does not limit the protection scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
Example (b): as shown in fig. 1, which is a schematic structural diagram of a mobile sound source positioning device, four sound receiving devices 1 are arranged in an array to form a rectangular area, the sound source device 1 is placed in the rectangular area, the sound source device 1 adopts a loudspeaker or a buzzer as a sound source, NE555 generates a square wave with a frequency of 500Hz as a sound signal, and any one sound receiving device 1 consists of a spherical cover and a base; as shown in fig. 2, the structure block diagram of the mobile sound source positioning device is shown, a sound receiver 2 (the sound receiver 2 may be a microphone device), a communication module 7 (one of a GPRS module or a GSM module is adopted), a main control module 3 and a power module 6 (one of a dry battery or a lithium battery is adopted) are arranged in a spherical cover, the main control module 3 is composed of an FPGA module 5 and a PCB board, a signal processing circuit 4 is welded on the PCB board, an output end of the sound receiver 2 is electrically connected with a signal input end of the signal processing circuit 4, and an output end of the signal processing circuit 4 is electrically connected with the FPGA module 5; the signal processing circuit 4 is composed of a signal amplifying circuit 41, a filter circuit 42, and a signal comparing circuit 43.
As shown in fig. 3, the signal amplification circuit diagram of a mobile sound source positioning device includes a resistor R1, a first end of the resistor R1 is electrically connected to the positive terminal of the sound receiver KM1, a negative terminal of the sound receiver KM1 is grounded, a second end of the resistor R1 is electrically connected to a power supply, a first end of the resistor R1 is electrically connected to a first end of a capacitor C1, a second end of the capacitor C1 is electrically connected to a base terminal of a transistor Q1, a base terminal of the transistor Q1 is electrically connected to a first end of a resistor R3, a second end of the resistor R3 is electrically connected to a first end of a capacitor C2, a second end of the capacitor C2 is electrically connected to an input terminal of the filter circuit 42, a collector terminal of the transistor Q1 is electrically connected to a first end of a resistor R2, a second end of the resistor R2 is electrically connected to a second end of a resistor R1. In the scheme, because the signal received by the sound receiver 2 is small when the signal is not amplified, the signal is not easy to detect, the signal received by the rear stage is amplified by the triode, and the change of the current in the collector can be converted into the change of the voltage through the RC circuit in the circuit and then is sent to the output end.
As shown in fig. 4, the filter circuit diagram of a mobile sound source localization apparatus includes a resistor R4, a first end of the resistor R4 is electrically connected to an output terminal of an amplifying circuit, a second end of the resistor R4 is electrically connected to a first end of a capacitor C4, a second end of the capacitor C4 is electrically connected to an inverting input terminal of an operational amplifier U1 (using a four-operational amplifier LM324 with true differential input), a forward input terminal of the operational amplifier U1 is electrically connected to a first end of a capacitor C5, a second end of a capacitor C5 is grounded, a first end of a capacitor C5 is electrically connected to a first end of a resistor R8, a second end of a resistor R8 is electrically connected to a power supply, a first end of a resistor R8 is electrically connected to a first end of a resistor R7, a second end of a resistor R7 is electrically connected to a second end of a capacitor C5, a second end of the capacitor C5 is electrically connected to a first end of a resistor R5, a second end of a CCD 6 is electrically connected to a resistor C4642, the second terminal of the resistor R6 is electrically connected to the second terminal of the capacitor C4, the first terminal of the resistor R6 is electrically connected to the output terminal of the operational amplifier U1, and the output terminal of the operational amplifier U1 is electrically connected to the output terminal of the signal comparison circuit 43. In this embodiment, the sound receiving apparatus 1 requires that the received signal is only sent from the sound source module when the frequency of the received signal is about 500 Hz. In the sound receiving apparatus 1, the sound signal received by the sound receiver 2 is of an arbitrary frequency, and therefore, the subsequent stage is subjected to filtering processing. The filtering adopts a second-order band-pass filter, the center frequency of the filter is finally 500Hz, the bandwidth is 50Hz through the matching of a capacitor resistor, and the sound signals sent by the sound production module can be filtered out after the signals received by the sound receiver 2 pass through the band-pass filter.
As shown in fig. 5, the signal comparison circuit diagram of a mobile sound source positioning device includes an operational amplifier U2 (using a four-operational amplifier LM324 with true differential input), an inverting input terminal of the operational amplifier U2 is electrically connected to an output terminal of a filter circuit 42, a forward input terminal of the operational amplifier U2 is electrically connected to a sliding terminal of a sliding rheostat R10, a first terminal of the sliding rheostat R10 is connected to a power supply, a second terminal of the sliding rheostat R10 is grounded, a positive terminal of the power supply of the operational amplifier U2 is electrically connected to a first terminal of a capacitor C6, a second terminal of the capacitor C6 is grounded, a first terminal of a capacitor C6 is electrically connected to a first terminal of a resistor R9, a second terminal of a resistor R9 is electrically connected to an output terminal of the operational amplifier U2, and an output terminal of the operational amplifier. In the scheme, a signal filtered by a second-order active band-pass filter is still a sine wave, but the signal is inconvenient for the information processing module FPGA module 5 to process, so a first-order LM324 comparator is added at the rear stage of the filter, the basic function of the comparator is to compare two input voltages, and output a high level or a low level according to a comparison result, and judge the size of the input signal accordingly, the amplitude of the signal output from the band-pass filter is more than 4V, so the comparison voltage given by a comparison end of the comparator is set to be about 1V, and the FPGA module 5 can be used for detecting when the output signal is a square wave with the frequency of 500Hz and the amplitude level is the high level.
The above-mentioned embodiment does the utility model relates to a preferred embodiment of the mobile sound source positioning device, not limit with this the utility model discloses a concrete implementation scope, the utility model discloses a scope includes and is not limited to this embodiment, and the all equivalent changes that do according to the shape, the structure of the utility model are all in the protection scope of the utility model.
Claims (9)
1. A mobile sound source localization apparatus, characterized in that: the device comprises four sound receiving devices, wherein any one sound receiving device comprises a spherical cover and a base, and the spherical cover is fixedly connected with the base through a support; the spherical cover is internally provided with a sound receiver, a communication module, a main control module and a power module, and the power module and the communication module are respectively and electrically connected with the main control module.
2. The moving sound source localization apparatus according to claim 1, wherein: the master control module comprises an FPGA module and a PCB, wherein a signal processing circuit is welded on the PCB, the output end of the sound receiver is electrically connected with the signal input end of the signal processing circuit, and the output end of the signal processing circuit is electrically connected with the FPGA module.
3. The moving sound source localization apparatus according to claim 2, wherein: the signal processing circuit comprises a signal amplifying circuit, a filter circuit and a signal comparison circuit; the input end of the signal amplification circuit is electrically connected with the sound receiver, the output end of the signal amplification circuit is electrically connected with the input end of the filter circuit, the output end of the filter circuit is electrically connected with the input end of the signal comparison circuit, and the output end of the signal comparison circuit is electrically connected with the FPGA module.
4. A moving sound source localization apparatus according to claim 3, wherein: the amplifying circuit comprises a resistor R1, a first end of a resistor R1 is electrically connected with a positive electrode end of the sound receiver KM1, a negative electrode end of the sound receiver KM1 is grounded, a second end of a resistor R1 is electrically connected with a power supply, a first end of a resistor R1 is electrically connected with a first end of a capacitor C1, a second end of the capacitor C1 is electrically connected with a base end of a triode Q1, a base end of a triode Q1 is electrically connected with a first end of a resistor R3, a second end of a resistor R3 is electrically connected with a first end of a capacitor C2, a second end of the capacitor C2 is electrically connected with an input end of a filter circuit, a collector end of a triode Q1 is electrically connected with a first end of a resistor R2, a second end of a resistor R2 is electrically connected with a second end of a resistor R63.
5. A moving sound source localization apparatus according to claim 3, wherein: the filter circuit comprises a resistor R4, a first end of the resistor R4 is electrically connected with an output end of the amplifying circuit, a second end of the resistor R4 is electrically connected with a first end of a capacitor C4, a second end of the capacitor C4 is electrically connected with a reverse input end of an operational amplifier U1, a forward input end of the operational amplifier U1 is electrically connected with a first end of a capacitor C5, a second end of a capacitor C5 is grounded, a first end of a capacitor C5 is electrically connected with a first end of the resistor R8, a second end of a resistor R8 is electrically connected with a power supply, a first end of a resistor R8 is electrically connected with a first end of a resistor R7, a second end of a resistor R7 is electrically connected with a second end of a capacitor C5, a second end of a capacitor CCD is electrically connected with a first end of a resistor R5, a second end of a resistor R5 is electrically connected with a first end of a capacitor C2 point, a second end of a capacitor C2 is electrically connected with a first end of a resistor R59, the first end of the resistor R6 is electrically connected with the output end of the operational amplifier U1, and the output end of the operational amplifier U1 is electrically connected with the output end of the signal comparison circuit.
6. A moving sound source localization apparatus according to claim 3, wherein: the signal comparison circuit comprises an operational amplifier U2, wherein the reverse input end of the operational amplifier U2 is electrically connected with the output end of the filter circuit, the forward input end of the operational amplifier U2 is electrically connected with the sliding end of the sliding rheostat R10, the first end of the sliding rheostat R10 is connected with a power supply, the second end of the sliding rheostat R10 is grounded, the positive electrode end of the power supply of the operational amplifier U2 is electrically connected with the first end of a capacitor C6, the second end of the capacitor C6 is grounded, the first end of a capacitor C6 is electrically connected with the first end of a resistor R9, the second end of the resistor R9 is electrically connected with the output end of the operational amplifier U2, and the output end of the operational amplifier.
7. The moving sound source localization apparatus according to claim 1, wherein: the communication module adopts one of a GPRS module or a GSM module.
8. The moving sound source localization apparatus according to claim 1, wherein: the power module adopts one of a dry battery or a lithium battery.
9. The moving sound source localization apparatus according to claim 1, wherein: the spherical cover is provided with a plurality of uniformly distributed pores on the circumferential surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920652151.3U CN210347912U (en) | 2019-05-08 | 2019-05-08 | Mobile sound source positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920652151.3U CN210347912U (en) | 2019-05-08 | 2019-05-08 | Mobile sound source positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210347912U true CN210347912U (en) | 2020-04-17 |
Family
ID=70181254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920652151.3U Expired - Fee Related CN210347912U (en) | 2019-05-08 | 2019-05-08 | Mobile sound source positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210347912U (en) |
-
2019
- 2019-05-08 CN CN201920652151.3U patent/CN210347912U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |
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