Half-inch three-dimensional vector microphone device

Abstract

The utility model relates to the technical field of acoustic measurement, and discloses a 1 / 2-inch three-dimensional vector microphone device, which comprises a mounting shell, a fixed base is fixedly arranged on the inner side of the bottom of the mounting shell, three fixed grooves are formed in the fixed base at equal intervals in a surrounding manner, PCBs are arranged in the fixed grooves, and the PCBs are arranged in the fixed grooves. The PCB is provided with particle vibration velocity sensors, and the particle vibration velocity sensors installed on the PCB are the particle vibration velocity sensor in the X direction, the particle vibration velocity sensor in the Y direction and the particle vibration velocity sensor in the Z direction. According to the utility model, rapid installation of the microphone is convenient to realize, the three-dimensional mass point vibration velocity sensor can have better mutual orthogonal precision due to the design of the fixed base, so that higher sensitivity and measurement precision are provided, and the side surface of the top of the installation shell is designed to be hollow, so that the installation cost is reduced. The part close to the particle vibration velocity sensor is not shielded by redundant materials, and signal interference caused by structural shielding can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of acoustic measurement technology, and concretely relates to a one-half inch three-dimensional vector microphone device. BACKGROUND

[0002] Three-dimensional vector microphone is a kind of equipment for measuring sound field particle velocity information and sound pressure information, can measure the three-dimensional particle velocity vector information and sound pressure scalar information of spatial sound field under the condition of spatial common point, time synchronization, it is widely used in noise source measurement, holographic detection, fault diagnosis, intelligent voice interaction and multiple fields.

[0003] Three-dimensional vector microphone integrates three hot-wire particle velocity sensors and a sound pressure sensor inside, adopts one-half inch standard size design, microphone tube body integrates novel low-noise signal conditioning circuit inside, this design makes it can carry out high-precision acoustic measurement such as sound pressure, particle velocity, sound intensity, sound power in the whole working frequency band (10Hz-10kHz).However, the traditional one-half inch three-dimensional vector microphone is to integrate three particle velocity sensors directly on the circuit board, assembly process is complex, packaging is difficult, if the packaging structure is lost, it will lead to low sensitivity.

[0004] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] To solve the problem that the traditional one-half inch three-dimensional vector microphone is to integrate three particle velocity sensors directly on the circuit board, assembly process is complex, packaging is difficult, if the packaging structure is lost, it will lead to low sensitivity, the basic idea of technical scheme of the utility model is:

[0006] A one-half inch three-dimensional vector microphone device, including installation shell, the bottom inboard of installation shell is fixedly provided with fixed base, three fixed slots are arranged at equal intervals on the fixed base, and PCB boards are arranged in the fixed slots, particle velocity sensors are arranged on the PCB boards, the particle velocity sensors installed on the PCB boards are respectively particle velocity sensors in X direction, particle velocity sensors in Y direction and particle velocity sensors in Z direction, the particle velocity sensors are located at the top position of the inboard of installation shell, the top side of installation shell is hollow design, end cover is installed at the top end position of installation shell, installation blocks are fixedly connected to the outer wall of end cover and arranged at equal intervals, fixed blocks are fixedly connected to the outer wall of installation shell and arranged at equal intervals, and the fixed blocks are installed on the installation blocks.

[0007] As a preferred embodiment of the utility model, the fixed base bottom is provided with a PCB plug-in part, the mounting shell bottom is provided with a through hole, and the PCB plug-in part bottom is located inside the through hole.

[0008] As a preferred embodiment of the utility model, the mounting shell bottom outer wall is fixedly connected with a mounting plate of circular ring structure, and the mounting plate is provided with equidistantly distributed mounting holes.

[0009] As a preferred embodiment of the utility model, the mounting block is provided with a through hole, and a fixed screw is arranged inside the through hole, the fixed block is provided with a threaded hole, and the fixed screw is screwed on the inner wall of the threaded hole.

[0010] As a preferred embodiment of the utility model, the fixed screw top end is a hexagonal screw head, and the hexagonal screw head is in contact with the mounting block top outer wall.

[0011] As a preferred embodiment of the utility model, the fixed screw bottom end is provided with a fastening nut, and the fastening nut top is in contact with the fixed block bottom outer wall.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a kind of particle velocity sensors of X direction, Y direction and Z direction are installed on three PCBs, so that form three one-dimensional vector microphones, by the fixed base of being set and being provided with equidistantly encircling distribution three fixed slots on fixed base, it is convenient to install PCB in fixed slot, realize the quick installation of microphone, benefit from the design of fixed base, three-dimensional particle velocity sensor can be realized with better mutual orthogonal precision, to provide higher sensitivity and measurement accuracy, and the top side of mounting shell is hollow design, so that the part close to particle velocity sensor has no redundant material obstruction, can effectively avoid the signal interference caused by structure obstruction, to provide better acoustic performance.

[0014] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. DRAWINGS

[0015] In the drawings:

[0016] Figure 1 It is overall structure schematic view of the utility model;

[0017] Figure 2 It is side view structure schematic view of the utility model;

[0018] Figure 3 It is mounting shell cross section structure schematic view of the utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure between the fixed base and the PCB board of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixed base structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure between the outer shell and the end cap of this utility model.

[0022] In the diagram: 1. Housing; 2. PCB connector; 3. End cap; 4. Mounting plate; 5. Fixing base; 6. PCB board; 7. Mass velocity sensor; 8. Fixing groove; 9. Fixing block; 10. Mounting block; 11. Fixing screw; 12. Fastening nut. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0024] like Figures 1 to 6 As shown

[0025] A half-inch three-dimensional vector microphone device, comprising a mounting shell 1, a fixed base 5 is fixedly arranged in the bottom inner side of the mounting shell 1, three fixed grooves 8 are arranged at equal intervals on the fixed base 5, and a PCB board 6 is arranged in each fixed groove 8. The fixed base 5 is arranged, and the three fixed grooves 8 are arranged at equal intervals on the fixed base 5. The PCB board 6 is installed in the fixed groove 8, the microphone is quickly installed, the mutual orthogonal precision of the three-dimensional particle velocity sensor 7 is better due to the design of the fixed base 5, higher sensitivity and measurement accuracy are provided, the PCB connector 2 is installed at the bottom of the fixed base 5, a through hole is arranged at the bottom of the mounting shell 1, and the bottom of the PCB connector 2 is located inside the through hole. The PCB connector 2 is arranged at the bottom of the fixed base 5, the microphone is connected with the socket on the equipment, the PCB connector 2 is in contact with the corresponding hole position of the socket on the equipment, the particle velocity sensor 7 is arranged on the PCB board 6, the particle velocity sensor 7 installed on the PCB board 6 is the particle velocity sensor 7 in the X direction, the particle velocity sensor 7 in the Y direction and the particle velocity sensor 7 in the Z direction, the particle velocity sensor 7 in the X direction, the particle velocity sensor 7 in the Y direction and the particle velocity sensor 7 in the Z direction are installed on the three PCB boards 6, three one-dimensional vector microphones are formed, the particle velocity sensor 7 is located at the top position inside the mounting shell 1, the top side of the mounting shell 1 is designed as a hollow structure, the part close to the particle velocity sensor 7 is not blocked by excess material, signal interference caused by structural obstruction can be effectively avoided, better acoustic performance can be provided, the end cover 3 is installed at the top position of the mounting shell 1, the mounting block 10 is fixedly connected to the outer wall of the end cover 3, the fixed block 9 is fixedly connected to the outer wall of the mounting shell 1, and the fixed block 9 is installed on the mounting block 10.

[0026] In the specific embodiment, the mounting plate 4 in the circular ring structure is fixedly connected to the outer wall of the bottom of the mounting shell 1, the mounting holes are arranged at equal intervals on the mounting plate 4, the mounting plate 4 is arranged, the mounting holes are arranged on the mounting plate 4, the screws are inserted into the mounting holes and the nuts are tightened, the device can be installed on the equipment to be used, the through hole is arranged on the mounting block 10, the fixed screw 11 is arranged inside the through hole, the threaded hole is arranged on the fixed block 9, the fixed screw 11 is screwed on the inner wall of the threaded hole, the top end of the fixed screw 11 is a hexagonal screw head, the hexagonal screw head is in contact with the top outer wall of the mounting block 10, the fastening nut 12 is screwed at the bottom end of the fixed screw 11, the top of the fastening nut 12 is in contact with the bottom outer wall of the fixed block 9, when disassembly and maintenance are needed, the fastening nut 12 is rotated and screwed out from the bottom end of the fixed screw 11, after being screwed out, the fixed screw 11 is rotated and screwed out from the fixed block 9, then the end cover 3 can be disassembled from the mounting shell 1, and the components in the mounting shell 1 can be maintained.

[0027] The implementation principle of a half-inch three-dimensional vector microphone device of the embodiment is as follows:

[0028] In specific use, the mounting plate 4 is arranged, and a mounting hole is formed in the mounting plate 4. A screw is inserted into the mounting hole, and a nut is screwed, so that the device is conveniently mounted on a device to be used. The PCB connector 2 arranged at the bottom of the fixing base 5 is convenient for mounting and connecting the microphone with a socket on the device, so that the PCB connector 2 is in contact with a corresponding hole position of the socket on the device. The X-direction particle velocity sensor 7, the Y-direction particle velocity sensor 7, and the Z-direction particle velocity sensor 7 are respectively mounted on the three PCBs 6, so that three one-dimensional vector microphones are formed. The fixing base 5 is arranged, and three fixing grooves 8 are formed in the fixing base 5 and are equidistantly and circumferentially distributed, so that the PCB 6 is conveniently mounted in the fixing groove 8, and the microphone is quickly mounted. Thanks to the design of the fixing base 5, the particle velocity sensors 7 in three dimensions have better mutual orthogonal precision, thereby providing higher sensitivity and measurement accuracy. In addition, the top side of the mounting shell 1 is designed to be hollow, so that the part close to the particle velocity sensor 7 is not shielded by excess material, signal interference caused by structural shielding can be effectively avoided, and better acoustic performance can be provided. When disassembly and maintenance are needed, the fastening nut 12 is rotated and screwed out from the bottom end of the fixing screw 11. After being screwed out, the fixing screw 11 is rotated and screwed out from the fixing block 9, and then the end cover 3 can be disassembled from the mounting shell 1, so that the components in the mounting shell 1 can be maintained.

Claims

1. A half-inch three-dimensional vector microphone device comprising a mounting housing (1), characterized in that, The bottom inner side of the mounting shell (1) is fixedly provided with a fixed base (5), three fixed grooves (8) are arranged at equal intervals on the fixed base (5), a PCB board (6) is arranged in each fixed groove (8), a particle vibration velocity sensor (7) is arranged on the PCB board (6), the particle vibration velocity sensors (7) installed on the PCB boards (6) are respectively particle vibration velocity sensors (7) in X direction, particle vibration velocity sensors (7) in Y direction and particle vibration velocity sensors (7) in Z direction, the particle vibration velocity sensors (7) are located at the top position of the inner side of the mounting shell (1), the top side of the mounting shell (1) is designed as a hollow, an end cover (3) is installed at the top end position of the mounting shell (1), the outer wall of the end cover (3) is fixedly connected with mounting blocks (10) arranged at equal intervals, the outer wall of the mounting shell (1) is fixedly connected with fixed blocks (9) arranged at equal intervals, and the fixed blocks (9) are installed on the mounting blocks (10).

2. A one-half inch three-dimensional vector microphone apparatus as defined in claim 1, wherein, The bottom of the fixed base (5) is provided with a PCB connector (2), and the bottom of the PCB connector (2) is located inside the through hole in the bottom of the mounting shell (1).

3. A one-half inch three-dimensional vector microphone apparatus as defined in claim 1, wherein, The outer wall of the bottom of the mounting shell (1) is fixedly connected with a mounting plate (4) of a circular ring structure, and the mounting plate (4) is provided with mounting holes arranged at equal intervals.

4. A one-half inch three-dimensional vector microphone apparatus as defined in claim 1, wherein, The mounting block (10) is provided with a through hole, and a fixed screw (11) is arranged inside the through hole, the fixed block (9) is provided with a threaded hole, and the fixed screw (11) is screwed on the inner wall of the threaded hole.

5. A one-half inch three-dimensional vector microphone apparatus as defined in claim 4, wherein, The top end of the fixed screw (11) is a hexagonal screw head, and the hexagonal screw head is in contact with the top outer wall of the mounting block (10).

6. A one-half inch three-dimensional vector microphone apparatus as defined in claim 4, wherein, The bottom end of the fixed screw (11) is provided with a fastening nut (12), and the top of the fastening nut (12) is in contact with the bottom outer wall of the fixed block (9).

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