CN207424240U - A kind of sonic location system - Google Patents
A kind of sonic location system Download PDFInfo
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- CN207424240U CN207424240U CN201721404496.4U CN201721404496U CN207424240U CN 207424240 U CN207424240 U CN 207424240U CN 201721404496 U CN201721404496 U CN 201721404496U CN 207424240 U CN207424240 U CN 207424240U
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Abstract
The utility model discloses a kind of sonic location systems, including sound acquisition module, filtering and amplifying circuit, Wave beam forming circuit, peak-detector circuit, comparison circuit, dio Output Modules and bluetooth module, sound acquisition module includes the array of four microphone compositions, and microphone is used to receive the audio signal in environment；Filtering and amplifying circuit, for being amplified filtering to four tunnel audio signals；Wave beam forming circuit, for amplifying filtered four tunnels audio signal phase shift time delay, four tunnels of generation sinusoidal signal of different sizes；Peak-detector circuit, for every road sinusoidal signal to be converted to a size DC level signal identical with its peak value, i.e., four DC levels that will be obtained after four-way sinusoidal signal detection；Comparison circuit compares the size of four DC levels to determine the location information of audio signal.The people or object that the utility model can simultaneously make a sound all directions position, fast and accurate for positioning.
Description
Technical Field
The utility model relates to a sound localization technical field, especially a sound localization system.
Background
The passive sound detection positioning technology is a high and new technology for receiving sound field information and determining the position of a target sound source by using an electronic device, belongs to a non-radiation source target positioning technology, is mainly used for passive sound detection and has no active detection function. The method is characterized in that the system only depends on the receiving of the sound signal of the target sound source, and the received sound signal is used for realizing the position detection and the positioning of the target sound source. At present, the sound source positioning technology mainly utilizes a microphone array to receive sound field information, and realizes direction finding and distance measurement of passive sound source signals by means of time difference estimation and time delay estimation of sound source signals reaching each array element. Therefore, in the case of a microphone array with known geometry, we can accurately calculate the position parameter information source from the estimate of the time difference of the source signal arriving at each microphone element. Sound source localization techniques have a long history of development. It was first used in sonar systems, where electromagnetic waves are used to find the position of an underwater target, where the electromagnetic waves are very large and therefore subject to distance limitations. In this case, the underwater target acoustic signal tracking method is developed. 1940 da vinci, italy, first discovered the vocal tube from which the passive underwater sound localization technology emerged, and now had a history of more than 500 years of development. However, the development in the true sense is that after world war II, when sonar is used underwater to find the target, the method can easily expose itself, and potential danger is brought. Thus, research into underwater passive acoustic localization has begun. The passive sound detection technology applied to the ground in the first world war is mainly used for detecting the artillery battle field of enemies and obtains good application effect. In world war ii, acoustic detection technology is of particular importance, with most artillery reconnaissance missions relying on acoustic source localization technology. In the korean war, the acoustic detection technique also shows unique advantages.
However, in a period of time, with the rise of infrared and laser, the development of passive acoustic detection source technology is influenced to a certain extent by radar reconnaissance technology, so that the technology is ignored once. However, in recent years, the radar is more and more vulnerable to attack by using four challenges of electronic interference, low-altitude mutation, stealth technology and anti-radiation missile faced by a radar search target. In this case, people begin to review the application value of the passive acoustic detection positioning technology, which is another important reason for researching the passive acoustic detection technology. At present, with the development of computer technology, microelectronic technology, modern digital signal processing technology, artificial neural network, adaptive array processing technology, signal processing technology and other related technologies, passive acoustic localization technology develops rapidly again and achieves further practical application. In the aspect of national defense modernization, the sound source positioning technology can be used for measuring cannon battle field on the ground; can be used for finding a sniper position hidden in a certain place and measuring the landing point and the air explosion point of an ammunition test gun. In the field of aerospace, sound source localization techniques can be used to measure position. In addition, in modern military wars, the tank has the characteristics of strong protection, good maneuverability, strong firepower and the like, so that enemies can be suppressed on the ground battle; armed helicopters are also heavily relied upon in war along with their flexible mode of operation and unique ultra-low flight capabilities. However, with the rapid development of the existing stealth technology, the traditional detection technology applied to the tank and the helicopter loses the function, and in this situation, the passive sound source detection technology can exert great advantages.
After decades of developments of sound source positioning technology, the detection technology has been developed to a certain extent and improved to a certain extent. The original common sound wave detection technology is that carbon particles or a condenser receives sound signals, the wireless or optical fiber technology transmits the signals, signal information is recorded by recording through a pitting paper bag or an ink magnetic tape, then a recorder is connected to a computer, and the computer is used for processing the collected signals to analyze results. In modern sound source positioning technology, a power integrated circuit is developed, and the measurement process is simplified. At present, sound source positioning based on a microphone array is an important problem in the field of acoustic signal processing, compared with traditional array signal processing, voice signals processed by the array microphone have no carrier wave, the signal range capable of being processed is wide, the adaptability is strong, and the method and the device are widely applied to the fields of vehicle-mounted hands-free telephones, video conference systems, voice recognition systems, intelligent robots and the like. The existing device for searching the sound source at an unknown position is still large and cannot be carried about, so that the sound position cannot be accurately judged at any time.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art not enough and provide a sound source positioning system, the utility model discloses can fix a position the people or the thing that each direction sounded simultaneously, fix a position accurately fast.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
according to the utility model provides a sound source positioning system, including sound collection module, amplify filter circuit, beam forming circuit, peak detection circuit, comparison circuit, audio output module and bluetooth module, wherein, sound collection module, amplify filter circuit, beam forming circuit, peak detection circuit, comparison circuit connect gradually, audio output module and bluetooth module are connected with comparison circuit respectively; wherein,
the sound collection module comprises an array consisting of four microphones, and the microphones are used for receiving audio signals in the environment;
the amplifying and filtering circuit is used for amplifying and filtering the four paths of audio signals;
the wave beam forming circuit is used for carrying out phase-shifting time delay on the four paths of audio signals after amplification and filtering to generate four paths of sine signals with different sizes;
the peak detection circuit is used for converting each path of sinusoidal signals into a direct current level signal with the same size as the peak value of the sinusoidal signals, namely four direct current levels obtained after four paths of sinusoidal signals are detected;
the comparison circuit compares the magnitudes of the four direct current levels to determine the position information of the audio signal;
the audio output module is used for playing the position information of the received audio signal;
and the Bluetooth module is used for transmitting the determined position of the audio signal to an external gateway.
As a further optimization scheme of the sound source localization system of the present invention, the peak detection circuit includes a first operational amplifier, a second operational amplifier, first to eighth resistors, a capacitor, a first diode and a second diode; wherein, the negative input end of the first operational amplifier is connected with one end of a first resistor, the negative electrode of a first diode and one end of a third resistor respectively, the positive input end of the first operational amplifier is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a seventh resistor and the ground respectively, the other end of the seventh resistor is connected with the positive input end of a second operational amplifier, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with one end of a sixth resistor, one end of a capacitor, one end of a fifth resistor and the negative input end of the second operational amplifier respectively, the other end of the fifth resistor is connected with the positive electrode of the second diode and the other end of the third resistor respectively, the negative electrode of the second diode is connected with the output end of the first operational amplifier and the positive electrode of the first diode respectively, the other end of the capacitor is connected with one end of an eighth resistor, the other end of the eighth resistor is connected with the other end of the sixth resistor and the output end of the second operational amplifier respectively.
As a sound source positioning system further optimization scheme, first operational amplifier is OPA2188 operational amplifier.
As a sound source positioning system further optimization scheme, second operational amplifier is OPA2188 operational amplifier.
As a sound source positioning system further optimize the scheme, bluetooth module is BTM610 bluetooth module.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
(1) the utility model can simultaneously position people or objects which make sound in all directions, and the positioning is rapid and accurate;
(2) the utility model has simple structure, small volume and better portability;
(3) the utility model discloses circuit design is succinct clear, and low-power consumption fortune is put, reduces the equipment total volume, reduces the consumption, can support the long-time stable work of equipment.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
as shown in fig. 1, a sound source positioning system includes a sound collection module, an amplification filter circuit, a beam forming circuit, a peak detection circuit, a comparison circuit, an audio output module and a bluetooth module, wherein the sound collection module, the amplification filter circuit, the beam forming circuit, the peak detection circuit and the comparison circuit are sequentially connected, and the audio output module and the bluetooth module are respectively connected to the comparison circuit; wherein,
the sound collection module comprises an array consisting of four microphones, and the microphones are used for receiving audio signals in the environment;
the amplifying and filtering circuit is used for amplifying and filtering the four paths of audio signals;
the wave beam forming circuit is used for carrying out phase-shifting time delay on the four paths of audio signals after amplification and filtering to generate four paths of sine signals with different sizes;
the peak detection circuit is used for converting each path of sinusoidal signals into a direct current level signal with the same size as the peak value of the sinusoidal signals, namely four direct current levels obtained after four paths of sinusoidal signals are detected;
the comparison circuit compares the magnitudes of the four direct current levels to determine the position information of the audio signal;
the audio output module is used for playing the position information of the received audio signal;
and the Bluetooth module is used for transmitting the determined position of the audio signal to an external gateway.
As a further optimization scheme of the sound source localization system of the present invention, the peak detection circuit includes a first operational amplifier, a second operational amplifier, first to eighth resistors, a capacitor, a first diode and a second diode; wherein, the negative input end of the first operational amplifier is connected with one end of a first resistor, the negative electrode of a first diode and one end of a third resistor respectively, the positive input end of the first operational amplifier is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a seventh resistor and the ground respectively, the other end of the seventh resistor is connected with the positive input end of a second operational amplifier, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with one end of a sixth resistor, one end of a capacitor, one end of a fifth resistor and the negative input end of the second operational amplifier respectively, the other end of the fifth resistor is connected with the positive electrode of the second diode and the other end of the third resistor respectively, the negative electrode of the second diode is connected with the output end of the first operational amplifier and the positive electrode of the first diode respectively, the other end of the capacitor is connected with one end of an eighth resistor, the other end of the eighth resistor is connected with the other end of the sixth resistor and the output end of the second operational amplifier respectively.
The first operational amplifier is an OPA2188 operational amplifier, the second operational amplifier is an OPA2188 operational amplifier, and the Bluetooth module is a BTM610 Bluetooth module.
The utility model can simultaneously position people or objects which make sound in all directions, and the positioning is rapid and accurate; the utility model has simple structure, small volume and better portability; the utility model discloses circuit design is succinct clear, and low-power consumption fortune is put, reduces the equipment total volume, reduces the consumption, can support the long-time stable work of equipment.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replace, all should regard as belonging to the utility model discloses a protection scope.
Claims (5)
1. A sound source positioning system is characterized by comprising a sound acquisition module, an amplification filter circuit, a beam forming circuit, a peak detection circuit, a comparison circuit, an audio output module and a Bluetooth module, wherein the sound acquisition module, the amplification filter circuit, the beam forming circuit, the peak detection circuit and the comparison circuit are sequentially connected, and the audio output module and the Bluetooth module are respectively connected with the comparison circuit; wherein,
the sound collection module comprises an array consisting of four microphones, and the microphones are used for receiving audio signals in the environment;
the amplifying and filtering circuit is used for amplifying and filtering the four paths of audio signals;
the wave beam forming circuit is used for carrying out phase-shifting time delay on the four paths of audio signals after amplification and filtering to generate four paths of sine signals with different sizes;
the peak detection circuit is used for converting each path of sinusoidal signals into a direct current level signal with the same size as the peak value of the sinusoidal signals, namely four direct current levels obtained after four paths of sinusoidal signals are detected;
the comparison circuit compares the magnitudes of the four direct current levels to determine the position information of the audio signal;
the audio output module is used for playing the position information of the received audio signal;
and the Bluetooth module is used for transmitting the determined position of the audio signal to an external gateway.
2. The sound source localization system according to claim 1, wherein the peak detection circuit comprises a first operational amplifier, a second operational amplifier, first to eighth resistors, a capacitor, a first diode, and a second diode; wherein, the negative input end of the first operational amplifier is connected with one end of a first resistor, the negative electrode of a first diode and one end of a third resistor respectively, the positive input end of the first operational amplifier is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a seventh resistor and the ground respectively, the other end of the seventh resistor is connected with the positive input end of a second operational amplifier, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with one end of a sixth resistor, one end of a capacitor, one end of a fifth resistor and the negative input end of the second operational amplifier respectively, the other end of the fifth resistor is connected with the positive electrode of the second diode and the other end of the third resistor respectively, the negative electrode of the second diode is connected with the output end of the first operational amplifier and the positive electrode of the first diode respectively, the other end of the capacitor is connected with one end of an eighth resistor, the other end of the eighth resistor is connected with the other end of the sixth resistor and the output end of the second operational amplifier respectively.
3. The sound source localization system of claim 2, wherein the first operational amplifier is an OPA2188 operational amplifier.
4. The sound source localization system of claim 2, wherein the second operational amplifier is an OPA2188 operational amplifier.
5. The sound source localization system of claim 1, wherein the bluetooth module is a BTM610 bluetooth module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721404496.4U CN207424240U (en) | 2017-10-27 | 2017-10-27 | A kind of sonic location system |
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| CN201721404496.4U CN207424240U (en) | 2017-10-27 | 2017-10-27 | A kind of sonic location system |
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