Optical microphone sensing groove body mounting structure
By using hoop rubber ring and flange ring in the sensor tank installation structure of the optical microphone, the problem of wear and tear of the optical fiber transmission signal is solved, and higher quality signal conduction is achieved.
Patent Information
- Application Number
- CN202420607332.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-27
AI Technical Summary
After the existing internal sensing elements of optical microphones are connected to the optical fiber structure, wear is prone to occur at the interface, affecting the quality of the optical fiber transmission signal.
An optical microphone sensing groove installation structure is designed, and a hoop rubber ring is used to contact the optical fiber end inside the upper quartz diaphragm to provide insulation protection to avoid loss of optical signals, and to protect the optical fiber connection area through the flange ring to prevent bending and wear.
It effectively avoids the loss of optical signals in the quartz diaphragm area, improves the signal conduction quality, reduces the risk of optical fiber leakage, and improves the stability of overall signal conduction.
Smart Images
Figure CN222621197U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical microphones, in particular to an optical microphone sensor slot installation structure. Background Art
[0002] The basic principle of an optical microphone is to use an optical module to emit light to a diaphragm and receive light reflected by the diaphragm. When sound waves vibrate the diaphragm, the phase of the light reflected by the diaphragm is changed, and a corresponding light signal is generated accordingly, thereby realizing the conversion of sound signals to light signals and then back to light signals. This can provide a larger frequency response range, linearity, sensitivity and other characteristics.
[0003] After the sensor element inside the existing optical microphone is connected to the optical fiber structure for use, the interface is worn due to the influence of the installation structure, thereby affecting the problem of optical fiber transmission signal. Utility Model Content
[0004] The purpose of the utility model is to provide an optical microphone sensor slot installation structure. After the optical fiber is inserted into the upper quartz diaphragm, the rear end area will contact the ring hoop rubber ring. In this way, the ring hoop rubber ring can provide insulation protection for the optical fiber end, avoid the loss of optical signals in the upper quartz diaphragm and middle quartz diaphragm areas, improve signal transmission quality, and solve the problems in the prior art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an optical microphone sensor slot installation structure, including a sensor element and a flange seat plate, wherein the flange seat plate is provided with magnetic lock buckles on all four sides, and the magnetic lock buckles are connected to the flange seat plate through a card slot, and the sensor element includes an upper quartz diaphragm, a middle quartz diaphragm and a lower quartz diaphragm, and the upper quartz diaphragm, the middle quartz diaphragm and the lower quartz diaphragm are bonded to each other.
[0006] Preferably, a flange ring is provided on the top of the upper quartz diaphragm, the flange ring is connected to the upper quartz diaphragm via a slot, and a through hole is provided inside the upper quartz diaphragm.
[0007] Preferably, a rubber hoop is provided between the upper quartz diaphragm and the middle quartz diaphragm, and the rubber hoop and the flange ring have the same inner diameter as the through hole.
[0008] Preferably, the thickness of the lower quartz diaphragm is 0.2 mm, and the thickness of the upper quartz diaphragm and the middle quartz diaphragm is 1 mm.
[0009] Preferably, the through hole has a diameter of 2.5 mm, and an air cavity is provided below the through hole, and the air cavity has a diameter of 2 mm.
[0010] Preferably, a seat groove is provided on the outer surface of the flange seat plate, the lower quartz diaphragm is located inside the seat groove, and the lower quartz diaphragm is bonded to the flange seat plate.
[0011] Preferably, a plurality of vibration-absorbing rubber pads are provided at the bottom of the flange seat plate, and the vibration-absorbing rubber pads are connected to the flange seat plate via a slot.
[0012] Preferably, the magnetic lock includes a partition gasket, a magnetic bottom shaft, a locking spring and a lock head, and the magnetic bottom shaft and the lock head are arranged as an integrated structure.
[0013] Preferably, the locking spring is installed between the partition gasket and the lock head, and the lock head is telescopically connected to the partition gasket through the locking spring.
[0014] Preferably, the magnetic bottom shaft passes through the partition gasket and extends to the bottom of the flange seat plate, and the magnetic bottom shaft is fitted and connected to the flange seat plate.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The utility model adopts a three-layer quartz glass bonding method to construct, wherein the bottom layer of quartz glass is a sensing diaphragm, that is, the part that will vibrate when in contact with a sound signal, and its thickness is 0.2mm, the middle layer of quartz glass is an FP cavity, and its thickness is 1mm, which is the cavity length of the optical fiber FP cavity, and the top layer of quartz glass is a sealing layer structure, which can be connected with an external optical fiber to form a complete sensing element, wherein the top layer and the middle layer of quartz glass are both provided with through-hole structures, wherein the top layer of quartz through-hole is used to fix the ceramic ferrule inserted in the middle of the optical fiber, and its diameter is 2.5mm, and the middle layer of quartz through-hole is used to construct the air cavity of the FP interference cavity, and its diameter is 2mm, which is used as the diameter of the sensing diaphragm;
[0017] 2. In the utility model, after the optical fiber is inserted into the upper quartz diaphragm, the rear end area will contact the ring hoop rubber ring, so that the ring hoop rubber ring can play a role of insulating and protecting the optical fiber end, avoiding the loss of optical signals in the upper quartz diaphragm and middle quartz diaphragm areas, thereby improving the signal transmission quality, and the top flange ring can provide a protection for the connection area of the optical fiber, preventing the connection between the optical fiber and the upper quartz diaphragm from bending and wearing, which may cause leakage of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is the overall front view of the utility model;
[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;
[0020] Figure 3It is a schematic diagram of the overall expanded structure of the utility model;
[0021] Figure 4 This is a schematic diagram of the magnetic lock structure of the utility model.
[0022] In the figure: 1. sensor element; 2. flange seat plate; 3. magnetic lock; 101. upper quartz diaphragm; 102. middle quartz diaphragm; 103. lower quartz diaphragm; 104. sensor cavity; 105. flange ring; 106. hoop rubber ring; 107. air cavity; 201. anti-vibration rubber pad; 202. seat groove; 301. partition gasket; 302. magnetic bottom shaft; 303. locking spring; 304. lock head. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] In order to solve the problem that the sensor element inside the existing optical microphone is worn at the interface due to the influence of the installation structure after being connected to the optical fiber structure, thereby affecting the optical fiber transmission signal; please refer to Figure 1-4 , the utility model provides the following solutions:
[0025] An optical microphone sensor slot installation structure includes a sensor element 1 and a flange base plate 2. The flange base plate 2 is provided with magnetic lock buckles 3 on all sides. The magnetic lock buckles 3 are connected to the flange base plate 2 through a slot. The sensor element 1 includes an upper quartz diaphragm 101, a middle quartz diaphragm 102 and a lower quartz diaphragm 103. The upper quartz diaphragm 101, the middle quartz diaphragm 102 and the lower quartz diaphragm 103 are bonded to each other. A flange ring 105 is provided on the top of the upper quartz diaphragm 101. The flange ring 105 is connected to the upper quartz diaphragm 101 through a slot. A through hole 104 is provided inside the upper quartz diaphragm 101. A hoop rubber ring 106 is provided between the upper quartz diaphragm 101 and the middle quartz diaphragm 102. The hoop rubber ring 106 and the flange ring 105 are respectively located at the bottom and top of the upper quartz diaphragm 101. The optical fiber is inserted into the After the end of the upper quartz diaphragm 101, the end area will contact the hoop rubber ring 106, so that the hoop rubber ring 106 can play an insulating and protective role on the optical fiber end, avoid the optical signal from being lost in the upper quartz diaphragm 101 and the middle quartz diaphragm 102 area, and improve the signal transmission quality, and the top flange ring 105 can provide a protection for the connection area of the optical fiber to prevent bending and wear at the connection between the optical fiber and the upper quartz diaphragm 101, which may cause leakage of the optical fiber. The hoop rubber ring 106 and the flange ring 105 have the same inner diameter as the through hole 104, the thickness of the lower quartz diaphragm 103 is 0.2mm, the thickness of the upper quartz diaphragm 101 and the middle quartz diaphragm 102 is 1mm, the diameter of the through hole 104 is 2.5mm, and an air cavity 107 is arranged below the through hole 104, and the diameter of the air cavity 107 is 2mm;
[0026] The structure is constructed by bonding three layers of quartz glass, wherein the bottom layer of quartz glass is the sensing diaphragm, i.e., the part that vibrates when contacting the sound signal, and its thickness is 0.2mm; the middle layer of quartz glass is the FP cavity, and its thickness is 1mm, which is the cavity length of the optical fiber FP cavity; the top layer of quartz glass is a sealing layer structure, which can be connected with an external optical fiber to form a complete sensing element 1, wherein the top layer and the middle layer of quartz glass are both provided with a through hole 101 structure, wherein the top layer of quartz through hole is used to fix the ceramic ferrule inserted in the middle of the optical fiber, and its diameter is 2.5mm; the middle layer of quartz through hole 104 is used to construct the air cavity 107 of the FP interference cavity, and its diameter is 2mm, which is used as the diameter of the sensing diaphragm;
[0027] The inserted optical fiber ceramic ferrule is pre-placed on the prepared sensor element 1. It can be found that due to the step shape of the sensor element design, the ceramic ferrule can be just stuck at the preset 1mm cavity length. Then, the ceramic ferrule and the sensor element 1 are packaged with ultraviolet curing glue to obtain a complete optical fiber acoustic sensor module.
[0028] The photoelectric conversion part adopts a 3×3 phase demodulation system, and the electrical part adopts FPGA plus ARM architecture. The laser signal emitted by the laser light source of the photoelectric conversion part is modulated by the optical probe and then returned to the demodulation optical path of the photoelectric conversion part for optical processing. The optical signal is converted into an optical signal by the photodiode and then enters the electrical processing part. After the optical signal is converted into a digital signal, it is demodulated by the demodulation algorithm. Subsequent data processing mainly involves signal denoising filtering, sound source localization, etc. The FPGA of the electrical part mainly performs high-speed signal acquisition and demodulation algorithm DSP processing. The embedded ARM performs subsequent signal processing on the one hand, and uses the QT platform to visualize the data processing results on the other hand.
[0029] A seat groove 202 is provided on the outer surface of the flange seat plate 2, and the lower quartz diaphragm 103 is located inside the seat groove 202. The lower quartz diaphragm 103 is bonded to the flange seat plate 2. A plurality of shock-absorbing rubber pads 201 are provided at the bottom of the flange seat plate 2. The shock-absorbing rubber pads 201 are connected to the flange seat plate 2 through a card slot. The magnetic lock buckle 3 includes a partition gasket 301, a magnetic bottom shaft 302, a locking spring 303 and a lock head 304. The magnetic bottom shaft 302 and the lock head 304 are set as an integrated structure. The locking spring 303 is installed between the partition gasket 301 and the lock head 304. The lock head 304 is telescopically connected to the partition gasket 301 through the locking spring 303. The magnetic bottom shaft 302 penetrates the partition gasket 301 and extends to the bottom of the flange seat plate 2. The magnetic bottom shaft 302 is fitted and connected to the flange seat plate 2.
[0030] The lower quartz diaphragm 103 at the bottom of the sensor element 1 is directly installed on the outer surface of the flange base plate 2. The outer surface of the flange base plate 2 is connected to the shell structure by means of magnetic lock buckles 3. At the same time, multiple shock-absorbing rubber pads 201 are designed at the bottom of the flange base plate 2. The shock-absorbing rubber pads 201 can avoid direct contact between the shell and the flange base plate 2 to prevent the occurrence of conductive phenomena, and can also play a role in shock absorption and buffering.
[0031] Working principle: the inserted optical fiber ceramic ferrule is pre-placed on the prepared sensor element 1. It can be found that due to the step shape of the sensor element design, the ceramic ferrule can be just stuck in the preset 1mm cavity length. Then, the ceramic ferrule and the sensor element 1 are packaged with ultraviolet curing glue to obtain a complete optical fiber acoustic sensor module. The hoop rubber ring 106 and the flange ring 105 are respectively located at the bottom and top of the upper quartz diaphragm 101. The rear end area of the optical fiber will contact the hoop rubber ring 106 after it is inserted into the upper quartz diaphragm 101. In this way, the hoop rubber ring 106 can insulate and protect the optical fiber end, avoid the loss of optical signals in the upper quartz diaphragm 101 and the middle quartz diaphragm 102 area, and improve the signal transmission quality. The flange ring 105 on the top can provide a protection for the connection area of the optical fiber, and prevent the connection between the optical fiber and the upper quartz diaphragm 101 from bending and wearing, which leads to leakage of the optical fiber.
[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An optical microphone sensor slot installation structure, comprising a sensor element (1), characterized in that: The sensor element (1) further comprises a flange base plate (2), wherein the flange base plate (2) is provided with magnetic lock buckles (3) on all four sides, and the magnetic lock buckles (3) are connected to the flange base plate (2) via a slot, and the sensor element (1) comprises an upper quartz diaphragm (101), a middle quartz diaphragm (102) and a lower quartz diaphragm (103), and the upper quartz diaphragm (101), the middle quartz diaphragm (102) and the lower quartz diaphragm (103) are bonded to each other.
2. The optical microphone sensor slot installation structure according to claim 1, characterized in that: A flange ring (105) is arranged on the top of the upper quartz diaphragm (101), the flange ring (105) is connected to the upper quartz diaphragm (101) via a slot, and a through hole (104) is arranged inside the upper quartz diaphragm (101).
3. The optical microphone sensor slot installation structure according to claim 2, characterized in that: A ring-shaped rubber ring (106) is arranged between the upper quartz diaphragm (101) and the middle quartz diaphragm (102); the ring-shaped rubber ring (106) and the flange ring (105) have the same inner diameter as the through hole (104).
4. The optical microphone sensor slot installation structure according to claim 3, characterized in that: The thickness of the lower quartz diaphragm (103) is 0.2 mm, and the thickness of the upper quartz diaphragm (101) and the middle quartz diaphragm (102) is 1 mm.
5. The optical microphone sensor slot installation structure according to claim 4, characterized in that: The through hole (104) has a diameter of 2.5 mm, and an air cavity (107) is provided below the through hole (104), and the air cavity (107) has a diameter of 2 mm.
6. The optical microphone sensor slot installation structure according to claim 5, characterized in that: The outer surface of the flange seat plate (2) is provided with a seat groove (202), the lower quartz diaphragm (103) is located inside the seat groove (202), and the lower quartz diaphragm (103) is bonded to the flange seat plate (2).
7. The optical microphone sensor slot installation structure according to claim 6, characterized in that: A plurality of vibration-absorbing rubber pads (201) are arranged at the bottom of the flange seat plate (2), and the vibration-absorbing rubber pads (201) are connected to the flange seat plate (2) via a clamping groove.
8. The optical microphone sensor slot installation structure according to claim 7, characterized in that: The magnetic lock buckle (3) comprises a partition gasket (301), a magnetic bottom shaft (302), a locking spring (303) and a lock head (304), wherein the magnetic bottom shaft (302) and the lock head (304) are arranged as an integrated structure.
9. The optical microphone sensor slot installation structure according to claim 8, characterized in that: The locking spring (303) is installed between the partition gasket (301) and the lock head (304), and the lock head (304) is telescopically connected to the partition gasket (301) through the locking spring (303).
10. The optical microphone sensor slot installation structure according to claim 9, characterized in that: The magnetic bottom shaft (302) passes through the partition gasket (301) and extends to the bottom of the flange seat plate (2), and the magnetic bottom shaft (302) is closely connected to the flange seat plate (2).