A specific sound direction detector and a direction detecting method

Abstract

This invention discloses a location detector for specific sounds, comprising a sound collection box containing a sound cavity; several directional sound pickup horns are distributed on the outer peripheral wall of the sound collection box, each horn containing a pickup port, and the transmission hole of each pickup port is connected to the sound cavity; a sound recognition unit is disposed within the sound cavity; a selective sound shielding unit, which can rotate around the center of the sound cavity, is disposed within the sound cavity. The selective sound shielding unit is a ring with a notch, and an open opening is formed at the notch of the selective sound shielding unit. The rotation of the selective sound shielding unit causes the open opening to successively correspond to each pickup port. This invention designs a sound detector capable of recognizing and roughly determining the location of "specific sounds," thereby realizing the monitoring function of animal groups.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of sound detection. BACKGROUND

[0002] The present detector can be applied in the field of monitoring wild animal populations in plain areas, but is not limited thereto; wild animal populations in plain areas generally continuously emit "specific sounds", for example: an elephant herd continuously emits specific elephant herd footstep sounds, a monkey herd continuously emits specific monkey herd communication sounds, and a sheep herd continuously emits specific sheep herd baaing sounds. The sounds continuously emitted by the above-mentioned animal populations have the characteristics of specificity, consistency, stability, and long propagation distance. The patent CN202111347718.4 Wild Animal Sound Intelligent Monitoring and AI Recognition System and Device, CN201810677080.2 Automatic Monitoring System and Method for Wild Animals Based on Deep Learning Technology, and CN202210024964.4 Wild Animal Detection Method and Equipment provide recognition of wild animal specific sounds for automatically collecting species data and collecting specific sounds, but do not have the capability of specific range monitoring and direction recognition.

[0003] Based on the above-mentioned characteristics, the applicant designs a sound detector that can recognize and roughly determine the direction of the above-mentioned "specific sounds", thereby realizing the monitoring function of animal populations. SUMMARY

[0004] The present application provides a specific sound direction detector and a specific sound direction detection method to overcome the deficiencies in the prior art and realize a detector for direction determination of "specific sounds", thereby realizing the monitoring function of animal populations.

[0005] Technical solution: To achieve the above-mentioned purpose, a specific sound direction detector includes a sound collection box, and the sound collection box is an acoustic cavity. The outer peripheral wall of the sound collection box is provided with a plurality of directional sound pickup speakers, each pickup speaker has a pickup port, and the sound transmission holes of each pickup port are connected to the acoustic cavity. A sound recognition unit is arranged in the acoustic cavity. A selective sound shielding unit is arranged in the acoustic cavity and can rotate along the center of the acoustic cavity. The selective sound shielding unit is an annular structure with a notch, and the notch forms an open port. The rotation of the selective sound shielding unit causes the open port to correspond to each pickup port in turn.

[0006] Further, the pickup port corresponding to the open port is recorded as the open pickup port, and the other pickup ports except the open pickup port are recorded as the shielding pickup ports. The selective sound shielding unit can block all the sound transmission holes in the shielding pickup ports.

[0007] Further, the selective sound shielding unit comprises a notched annular framework, an annular sound guiding gap is formed between the outer periphery of the annular framework and the inner wall of the outer peripheral wall of the sound collecting box, the outer periphery of the annular framework is tightly attached along the contour with the expanded sound shielding element, the sound shielding element is separated from the inner wall of the outer peripheral wall of the sound collecting box before the sound shielding element is expanded, and the sound shielding element is attached to the inner wall of the outer peripheral wall of the sound collecting box after the sound shielding element is expanded, thereby blocking all sound transmission holes of the shielding sound collecting ports.

[0008] Further, the sound shielding element comprises a circular arc shaped latex tube curved along the contour of the annular framework, and an oil liquid filled cavity with both ends blocked is arranged in the circular arc shaped latex tube; the oil liquid filled cavity is filled with oil liquid; and an oil liquid injection unit is further arranged to inject oil into the oil liquid filled cavity; and the oil liquid filled cavity is continuously injected with oil liquid to increase the pressure in the oil liquid filled cavity, thereby expanding the circular arc shaped latex tube outward.

[0009] Further, the outer periphery of the notched annular framework is provided with an outer ring groove with a circular arc cross section, the circular arc shaped latex tube is tightly attached in the outer ring groove along the contour, the clockwise end and the counterclockwise end of the circular arc shaped latex tube are respectively fixedly connected to two connecting seats, the two connecting seats are respectively fixed to the clockwise end and the counterclockwise end of the annular framework, and the open port is between the two connecting seats.

[0010] Further, the inner wall of the outer peripheral wall of the sound collecting box is provided with an inner ring groove with a circular arc cross section along the contour, and the outer wall of the expanded circular arc shaped latex tube is tightly attached to the inner wall of the inner ring groove, thereby blocking the sound transmission holes in the shielding sound collecting ports.

[0011] Further, a rotating shaft coaxial with the sound cavity is further arranged, the rotating shaft can be actively rotated and paused, and the upper end of the rotating shaft is fixedly connected to the inner wall of the annular framework through a liquid guide arm, thereby synchronously rotating the annular framework with the rotating shaft.

[0012] Further, a liquid guide channel is arranged in the integrated structure of the annular framework, the rotating shaft and the liquid guide arm, one end of the liquid guide channel is communicated with the oil liquid filled cavity in the circular arc shaped latex tube, and the other end of the liquid guide channel is communicated with the oil liquid injection unit.

[0013] Further, a method for identifying and judging the direction of a specific sound of a specific sound direction detector: eight sound collecting ports respectively receive sounds in eight directions, and the sounds are conducted to the sound cavity through the annular sound guiding gap through the sound transmission holes, if the sound recognition unit recognizes a specific sound with a certain intensity, it indicates that the animal group emitting the specific sound has entered the detection range of the detector.

[0014] Further, the direction of the animal group emitting the specific sound relative to the detector is judged.

[0015] Step one: control the open mouth of the ring-shaped framework to correspond to the sound transmission hole of any one sound pickup port;

[0016] Step two: the circular arc-shaped latex tube expands outward, thereby blocking all the sound transmission holes in the shielded sound pickup ports; the only open sound pickup port transmits the sound from the direction to the sound cavity through the sound transmission hole and the open mouth, the sound recognition unit in the sound cavity recognizes the "specific sound" transmitted by the open sound pickup port, and records the intensity of the recognized "specific sound";

[0017] Step three: the circular arc-shaped latex tube is reduced from the expanded state to the initial state;

[0018] Step four: control the rotation shaft to actively rotate clockwise °, so that the open mouth of the ring-shaped framework corresponds to the sound transmission hole of another sound pickup port;

[0019] The process of "step two" to "step four" is executed eight times, and during the eight times of "step two" to "step four", the sound recognition unit in the sound cavity records the intensity of the "specific sound" eight times; the intensities of the above eight "specific sounds" are compared, and the intensity of one time is obtained.

[0020] Beneficial effect: the sound detector is designed, which can identify and roughly determine the direction of "specific sound", thereby realizing the monitoring function of animal groups. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the overall structure of the present detector; Figure 1 Figure 2 is a schematic view of the present detector;

[0022] Figure 3 is a sectional view of the present detector; Figure 2 Figure 4 is a sectional view of the present detector;

[0023] Figure 5 is a schematic view of the present detector after the internal selective sound shielding unit is hidden; Figure 3 Figure 6 is a partial enlarged view of the present detector; Figure 2 Figure 7 is a schematic view of the selective sound shielding unit;

[0024] Figure 8 is a sectional view of the selective sound shielding unit; Figure 4 Figure 9 is a schematic view of the selective sound shielding unit after the internal selective sound shielding unit is hidden.

[0025] Figure 10 is a schematic view of the selective sound shielding unit after the internal selective sound shielding unit is hidden. Figure 5 Figure 11 is a schematic view of the selective sound shielding unit after the internal selective sound shielding unit is hidden. Figure 4 Figure 12 is a schematic view of the selective sound shielding unit after the internal selective sound shielding unit is hidden.

[0026] Figure 6 Figure 13 is a schematic view of the selective sound shielding unit after the internal selective sound shielding unit is hidden. Figure 2 DETAILED DESCRIPTION The present application will be further described below in conjunction with the drawings.

[0027] Figure 1 is a schematic view of the overall structure of the present detector;

[0028] Figure 2 is a schematic view of the present detector; Figures 1 to 6 ​The specific sound direction detector shown includes a disc-shaped sound collecting box 5, and a sound cavity 14 is arranged in the sound collecting box 5. Figure 1 A plurality of sound direction pickup horns 2 are arranged in a circumferential array on the outer peripheral wall 31 of the sound collecting box 5, each of the sound direction pickup horns 2 is provided with a conical sound pickup port 1, and the sound transmission hole 13 at the thin end of each sound pickup port 1 is in communication with the sound cavity 14; a sound recognition unit based on a microphone is arranged in the sound cavity 14.

[0029] The specific structure of the sound recognition unit includes a structure as shown in Figure 2 , which specifically includes a microphone sound induction box 8 integrally arranged on the top of the sound collecting box 5, a permanent magnet cavity 10 arranged in the microphone sound induction box 8, the permanent magnet cavity 10 and the sound cavity 14 are separated by a diaphragm 11, a permanent magnet 7 is fixedly arranged in the permanent magnet cavity 10, an induction coil 6 is arranged on the diaphragm 11, the sound entering the sound cavity 14 makes the diaphragm 11 and the induction coil 6 vibrate in the magnetic field, thereby cutting the magnetic induction line, converting the sound signal into an electrical signal, and then identifying and recording the characteristics and intensity of the electrical signal through an AI sound recognition device and system; since the basic principle of identifying specific sound by the AI sound recognition system belongs to the prior art, it has been recorded many times in the existing patents such as "CN201810677080.2 Automatic monitoring system and method for wild animals based on deep learning technology", "CN202210024964.4 Wild animal detection method and equipment", and the like, which will not be repeated here.

[0030] A selective sound shielding unit 90 rotatable along the center of the sound cavity 14 is arranged in the sound cavity 14, the individual structure of the selective sound shielding unit 90 is as shown in Figure 4 , the selective sound shielding unit 90 is an annular structure with a notch, the notch of the selective sound shielding unit 90 forms an open port 29, and the rotation of the selective sound shielding unit 90 makes the open port 29 correspond to each sound pickup port 1 in turn, so that the sound transmission hole 13 of the corresponding sound pickup port 1 is in communication with the sound cavity 14 through the open port 29.

[0031] As shown in Figure 2 , the sound pickup port 1 corresponding to the open port 29 is denoted as an open sound pickup port 1b, and the sound pickup port 1 other than the open sound pickup port 1b is denoted as a shielding sound pickup port 1a; the selective sound shielding unit 90 can block all the sound transmission holes 13 in the shielding sound pickup ports 1a.

[0032] The selective sound shielding unit 90 includes an annular skeleton 4 with a notch, and the outer periphery of the annular skeleton 4 and the inner wall of the outer peripheral wall 31 of the sound collecting box 5 form an annular sound guide gap 28, as shown in Figure 2, the outer periphery of the annular framework 4 is attached with the expanded sound shielding element along the contour, the sound shielding element is separated from the inner wall surface of the outer peripheral wall 31 of the sound collecting box 5 before the sound shielding element is expanded, and the sound shielding element is attached to the inner wall surface of the outer peripheral wall 31 of the sound collecting box 5 after the sound shielding element is expanded, so as to block all sound transmission holes 13 of the shielding sound collecting port 1a.

[0033] The sound shielding element comprises a circular arc shaped latex tube 3 curved along the contour of the annular framework 4, and an oil liquid filling cavity 26 sealed at both ends in the circular arc shaped latex tube 3; the oil liquid filling cavity 26 is filled with an oil liquid, such as silicon oil or other stable chemical liquid; and the sound shielding element further comprises an oil liquid injection unit capable of injecting oil into the oil liquid filling cavity 26; the oil liquid filling cavity 26 is continuously injected with oil liquid, so as to increase the pressure in the oil liquid filling cavity 26, thereby expanding the circular arc shaped latex tube 3 outward.

[0034] The outer periphery of the annular framework 4 with a notch is provided with an outer ring groove 30 with a circular arc cross section, the circular arc shaped latex tube 3 is tightly attached in the outer ring groove 30 along the contour, the clockwise end and the counterclockwise end of the circular arc shaped latex tube 3 are respectively fixedly connected to two connecting seats 12, and the two connecting seats 12 are respectively fixed to the clockwise end and the counterclockwise end of the annular framework 4; and the open port 29 is between the two connecting seats 12.

[0035] The inner wall of the outer peripheral wall 31 of the sound collecting box 5 is provided with an inner ring groove 27 with a circular arc cross section along the contour, and the outer wall of the expanded circular arc shaped latex tube 3 is tightly attached to the inner wall of the inner ring groove 27, so as to block the sound transmission holes 13 in each shielding sound collecting port 1a.

[0036] The sound shielding element further comprises a rotating shaft 33 coaxial with the sound cavity 14, the rotating shaft 33 can be actively rotated and paused; the upper end of the rotating shaft 33 is fixedly connected to the inner wall of the annular framework 4 through a liquid guide arm 25, so that the annular framework 4 rotates synchronously with the rotating shaft 33.

[0037] An integrated structure formed by the annular framework 4, the rotating shaft 33 and the liquid guide arm 25 is provided with a liquid guide channel 9, one end of the liquid guide channel 9 communicates with the oil liquid filling cavity 26 in the circular arc shaped latex tube 3, and the other end of the liquid guide channel 9 communicates with the oil liquid injection unit.

[0038] In a specific embodiment, as Figure 2 Figure 2The oily liquid injection unit comprises an oily liquid transition box 23 which is coaxially and integrally connected to the lower side of the sound collecting box 5, the oily liquid transition box 23 is internally provided with an oily liquid transition cavity 22, the oily liquid transition cavity 22 is filled with oily liquid, a rotating shaft 33 penetrates through the oily liquid transition cavity 22, and the shaft centers of the upper and lower walls of the oily liquid transition box 23 are both in rotating sealing cooperation with the outer wall of the rotating shaft 33 through sealing bearings 19, the lower end of the liquid guide channel 9 in the rotating shaft 33 is communicated with the oily liquid transition cavity 22 through a communication hole 20; an oily liquid plunger barrel 15 is fixedly installed on one side of the oily liquid transition box 23, the oily liquid plunger barrel 15 is internally provided with a plunger channel 67, the plunger channel 67 is filled with oily liquid, the plunger channel 67 is communicated with the oily liquid transition cavity 22 through a communication pipe 18, a plunger 16 is arranged in the plunger channel 67, the upward movement of the plunger 16 causes the oily liquid in the plunger channel 67 to be pressed into the oily liquid transition cavity 22, and then the liquid in the oily liquid transition cavity 22 is pressed into the oily liquid filling cavity 26 through the liquid guide channel 9, so that the circular arc-shaped latex tube 3 is inflated; the driving device shell 24 is further fixedly wrapped outside the oily liquid transition box 23, a motor 21 and an electric telescopic device 17 are fixedly installed in the driving device shell 24, the motor 21 is used for driving the rotating shaft 33, and the electric telescopic device 17 is used for driving the upward and downward displacement of the plunger 16.

[0039] The feature direction judgment method of the specific sound direction detector

[0040] The animal groups in the plain zone generally continuously emit "specific sounds", for example, an elephant group continuously emits specific elephant group footstep sound, a monkey group continuously emits specific monkey group communication sound, and a sheep group continuously emits specific sheep group call sound, the sounds continuously emitted by the above animal groups all have specificity, consistency and stability; a single detector can realize the identification and approximate direction judgment of the above "specific sound" (and can realize comprehensive judgment and positioning through multiple detectors); the specific working method is as follows:

[0041] The outer peripheral wall 31 of the sound collecting box 5 of the detector has a total of eight pickup ports 1 in four directions, and the eight pickup ports 1 correspond to eight directions; in the initial state, the open port 29 of the selective sound shielding unit 90 does not correspond to the sound transmission hole 13 of any pickup port 1;

[0042] Then the detector is horizontally arranged in the open plain, and the detector is set to a certain height, and the oil liquid filling cavity 26 in the arc-shaped latex tube 3 of the device is controlled to be in a normal pressure state, so that the arc-shaped latex tube 3 is in a non-inflated state, so that the arc-shaped latex tube 3 is in a separated state with the inner ring groove 27, and each sound transmission hole 13 in the eight sound pickup ports 1 is communicated with the sound cavity 14 through the annular sound guide gap 28; At this time, the eight sound pickup ports 1 respectively receive the sound of eight directions, and the sound of each sound pickup port 13 is transmitted to the sound cavity 14 through the annular sound guide gap 28, and the sound recognition unit monitors the sound conducted to the sound cavity 14 in real time;

[0043] If the sound recognition unit does not identify a certain intensity of "specific sound", it means that there is no animal group in the effective detection range of the detector that can emit "specific sound";

[0044] If the sound recognition unit identifies a certain intensity of "specific sound", it means that the animal group that can emit "specific sound" has entered the detection range of the detector, and the direction of the animal group emitting "specific sound" relative to the detector needs to be judged, and the specific judgment method is as follows:

[0045] Step one: control the rotation of the rotating shaft 33, and the ring-shaped skeleton 4 with notches rotates synchronously with the rotating shaft 33, until the open port 29 of the ring-shaped skeleton 4 corresponds to the sound transmission hole 13 of any sound pickup port 1, at this time, the sound pickup port 1 corresponding to the open port 29 is recorded as the open sound pickup port 1b, and the other sound pickup ports 1 except the open sound pickup port 1b are recorded as the shielding sound pickup port 1a;

[0046] Step two: the oil liquid filling cavity 26 is further filled with oil by the oil liquid injection unit, and the continued injection of oil liquid in the oil liquid filling cavity 26 will increase the pressure in the oil liquid filling cavity 26, so that the arc-shaped latex tube 3 expands outward; The outer wall of the expanded arc-shaped latex tube 3 tightly abuts against the inner wall of the inner ring groove 27, so as to block all the sound transmission holes 13 in the shielding sound pickup port 1a; At this time, the only open sound pickup port 1b transmits the sound from the direction through the sound transmission hole 13 and the open port 29 to the sound cavity 14, and the sound recognition unit in the sound cavity 14 identifies the "specific sound" transmitted by the open sound pickup port 1b, and records the intensity of the identified "specific sound";

[0047] Step three: the oil liquid filling cavity 26 is continuously extracted by the oil liquid injection unit, so that the arc-shaped latex tube 3 is reduced from the inflated state to the initial state;

[0048] Step four: control the rotation shaft 33 to rotate clockwise 45°, so that the open port 29 of the ring-shaped framework 4 corresponds to the sound transmission hole 13 of another sound pickup port 1, at this time, the sound pickup port 1 corresponding to the open port 29 is the new open sound pickup port 1b, and the step is completed;

[0049] The process of "step two" to "step four" is executed eight times, and in the eight times, the sound recognition unit in the sound cavity 14 records the intensity of the "specific sound" eight times; the intensities of the eight "specific sounds" are compared to obtain the maximum intensity; in the eight times of "step two" to "step four", the direction of the open sound pickup port 1b corresponding to the "specific sound" with the maximum intensity is the direction of the animal group emitting the "specific sound".

[0050] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A specific sound azimuth detector characterized by: The sound collecting box is provided with a sound cavity; a plurality of sound collecting openings are distributed on the outer wall of the sound collecting box, and sound transmission holes of each sound collecting opening are communicated with the sound cavity; a sound recognition unit is arranged in the sound cavity; a selective sound shielding unit is arranged in the sound cavity and can rotate along the center of the sound cavity; the selective sound shielding unit is an annular body with a notch, an opening is formed at the notch of the selective sound shielding unit, and the rotation of the selective sound shielding unit makes the opening correspond to each sound collecting opening in turn. The sound collecting opening corresponding to the opening is recorded as an open sound collecting opening, and the sound collecting opening other than the open sound collecting opening is recorded as a shielding sound collecting opening. The selective sound shielding unit can block the sound transmission holes in all shielding sound collecting openings. The selective sound shielding unit comprises an annular skeleton with a notch, a ring-shaped sound guide gap is formed between the outer periphery of the annular skeleton and the inner wall of the outer wall of the sound collecting box, and an expanded sound shielding element is attached to the outer periphery of the annular skeleton along the contour; before the sound shielding element is expanded, the sound shielding element is separated from the inner wall surface of the outer wall of the sound collecting box; after the sound shielding element is expanded, the sound shielding element is attached to the inner wall surface of the outer wall of the sound collecting box, thereby blocking the sound transmission holes of all shielding sound collecting openings.

2. A specific sound azimuth detector according to claim 1, characterized in that: The sound shielding element comprises a circular-arc-shaped latex tube curved along the contour of the annular skeleton, and the circular-arc-shaped latex tube is filled with an oil liquid filling cavity at both ends; the oil liquid filling cavity is filled with an oil liquid; further comprising an oil liquid injection unit capable of injecting oil into the oil liquid filling cavity; continued injection of the oil liquid into the oil liquid filling cavity will cause the oil liquid filling cavity to increase in pressure, thereby causing the circular-arc-shaped latex tube to expand outward.

3. A specific sound azimuth detector according to claim 2, characterized in that: The outer periphery of the annular skeleton with a notch is provided with an outer ring groove with a circular arc cross section, the circular-arc-shaped latex tube is tightly held in the outer ring groove along the contour, the clockwise end and the counterclockwise end of the circular-arc-shaped latex tube are respectively fixedly connected to two connecting seats, the two connecting seats are respectively fixed to the clockwise end and the counterclockwise end of the annular skeleton, and the opening is between the two connecting seats.

4. A specific sound azimuth detector according to claim 2, characterized in that: The inner wall of the outer wall of the sound collecting box is provided with an inner ring groove with a circular arc cross section along the contour, and the outer wall of the expanded circular-arc-shaped latex tube is tightly attached to the inner wall of the inner ring groove, thereby blocking the sound transmission holes in each shielding sound collecting opening.

5. A specific sound azimuth detector according to claim 4, characterized in that: Further comprising a rotating shaft coaxial with the sound cavity, the rotating shaft can be actively rotated and paused; the upper end of the rotating shaft is fixedly connected to the inner wall of the annular skeleton through a liquid guide arm, so that the annular skeleton rotates synchronously with the rotating shaft.

6. A specific sound azimuth detector according to claim 5, characterized in that: An integrated structure formed by the annular skeleton, the rotating shaft and the liquid guide arm is provided with a liquid guide channel, one end of the liquid guide channel is communicated with the oil liquid filling cavity in the circular-arc-shaped latex tube, and the other end is communicated with the oil liquid injection unit.

7. The method of identifying and determining the direction of specific sound according to claim 6, wherein eight sound receiving openings receive sound from eight directions, and the sound is transmitted to the sound cavity through the sound transmission holes and the annular sound transmission gap, and if the sound recognition unit recognizes specific sound of a certain intensity, it indicates that the animal group emitting the specific sound has entered the detection range of the detector.

8. The method of identifying and determining the direction of specific sound according to claim 7, wherein the direction of the animal group emitting the specific sound relative to the detector is determined as follows: Step 1: control the opening of the annular frame to correspond to the sound transmission hole of any one sound receiving opening; Step 2: expand the circular arc-shaped latex tube outward to block all sound transmission holes in the sound receiving openings; the only open sound receiving opening transmits the sound from the direction to the sound cavity through the sound transmission hole and the opening; the sound recognition unit in the sound cavity recognizes the specific sound transmitted by the open sound receiving opening and records the intensity of the recognized specific sound; Step 3: reduce the circular arc-shaped latex tube from the expanded state to the initial state; Step 4: control the rotation shaft to actively rotate clockwise by 45°, so that the opening of the annular frame corresponds to the sound transmission hole of another sound receiving opening; repeat the process of "Step 2" to "Step 4" eight times; during the eight times of repeating the process of "Step 2" to "Step 4", the sound recognition unit in the sound cavity records the intensity of the specific sound eight times; compare the intensity of the specific sound eight times to obtain the maximum intensity. ​ ​ ​ ​ ​

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