Novel optical microphone probe

Abstract

The utility model relates to the technical field of microphone devices, in particular to a novel optical microphone probe which comprises a probe body, an end assembly arranged at one end of the probe body and a tail assembly arranged at the other end of the probe body. The end part assembly comprises an etalon, a collimating device and a glass tube, the etalon is connected with the collimating device through the glass tube, and the collimating device faces the etalon; and the tail component penetrates through the probe main body and is connected to the collimating device. A light beam output by the laser device is transmitted to the collimating device through the tail assembly, the light beam is collimated and then enters the etalon, the two faces of the etalon are plated with high-reflection films, laser can be reflected in a cavity for multiple times, and therefore the etalon generates strong resonance for light with certain specific wavelengths, wavelength changes are caused after sound waves enter the etalon, and the light with certain specific wavelengths is obtained. The change of the detection power can be converted into an electric signal to be output, the microphone structure can be simplified, various interferences can be effectively resisted, and the sensing precision and quality are ensured.

Description

Technical Field

[0001] This application relates to the field of microphone device technology, and in particular to a novel optical microphone probe. Background Technology

[0002] A microphone, also known as a transducer or pickup, is an energy conversion device that converts sound signals into electrical signals. Conventional microphones use a vibrating diaphragm to detect sound waves. Sound causes the diaphragm to deform, changing its resistance or voltage, and this signal is then collected and converted into an electrical signal for output. While this type of microphone meets general needs, it has structural limitations, requiring high assembly precision and having a low resonant frequency. Furthermore, it is susceptible to external interference such as radio frequency interference, which can reduce its sensitivity and affect normal use. Utility Model Content

[0003] In order to improve the problems of complex structure and susceptibility to interference in microphones in related technologies, this application provides a novel optical microphone probe.

[0004] This application provides a novel optical microphone probe, including a probe body, an end assembly disposed at one end of the probe body, and a tail assembly disposed at the other end of the probe body; the end assembly includes a standard, a collimating device, and a glass tube, the standard is provided with a high-reflectivity film, the standard and the collimating device are connected through the glass tube, and the collimating device faces the standard; the tail assembly passes through the probe body and is connected to the collimating device.

[0005] Furthermore, the probe body includes a loose tube, a tail cap disposed on the loose tube, and an outer sealing intermediate component disposed on the tail cap; the tail assembly passes through the loose tube; and the end assembly is disposed on the outer sealing intermediate component.

[0006] Furthermore, the tail cap is inserted into one end of the loose sleeve, and the outer sealing intermediate piece is connected to the end of the tail cap away from the loose sleeve.

[0007] Furthermore, the tail cap has an internal thread, and the outer sealing intermediate part has an external thread. The outer sealing intermediate part is locked to the internal thread of the tail cap through the external thread.

[0008] Furthermore, the outer sealing intermediate component has a mounting cavity, and the collimating device and the glass tube are inserted and mounted in the mounting cavity.

[0009] Furthermore, the end assembly also includes an end cap, which is snapped onto the end of the outer sealing intermediate member away from the tail cap, the end cap having a receiving cavity, and the standard being fitted into the receiving cavity.

[0010] Furthermore, the probe body also includes a dustproof net, which is wrapped around the end cap.

[0011] Furthermore, the tail assembly includes a pigtail fiber, which is threaded through the loose tube and connected to the collimating device.

[0012] Furthermore, the etalon includes an FP etalon, and the collimating device includes a C lens and a collimator head.

[0013] The beneficial effects of this application are:

[0014] 1. This application discloses a novel optical microphone probe, comprising a probe body, an end assembly, and a tail assembly. The end assembly includes a standard, a collimating device, and a glass tube connecting the two. The standard serves as a sensor. A laser beam is transmitted through the tail assembly to the collimating device, where it is collimated and then incident on the standard. Due to the high-reflectivity coating on both sides of the standard, the laser beam undergoes multiple reflections within the cavity, resulting in strong resonance of the standard for certain specific wavelengths of light. External sound waves cause changes in the air refractive index, altering the wavelength filtered by the standard cavity. The light signal carrying sound information is output through the tail assembly, and changes in power are detected to convert it into an electrical signal. By replacing the material diaphragm in the microphone with the end assembly, the microphone structure is simplified, and various interferences are effectively resisted, ensuring sensing accuracy and quality.

[0015] 2. This application discloses a novel optical microphone probe. The probe body is equipped with a threaded end cap and an outer sealing intermediate part, which facilitates positioning and installation during assembly, thereby speeding up the assembly process. At the same time, a dustproof net is provided on the end cap, which can block external dust and debris during the use of the sensor probe, thereby preventing dust and debris from entering the end assembly and affecting it, and improving the service life of the sensor probe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a novel optical microphone probe provided in an embodiment of this application;

[0017] Figure 2 This is a cross-sectional schematic diagram of a novel optical microphone probe provided in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of a novel optical microphone probe mid-end component provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Probe body; 11. Loose tube; 12. Tail cap; 13. Outer sealing intermediate component; 2. End assembly; 21. Standard etalon; 22. Collimator; 221. C lens; 222. Collimator head; 23. Glass tube; 24. End cap; 3. Tail assembly; 31. Fiber optic pigtail. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0024] Reference Figure 1 , Figure 2 as well as Figure 3 This application provides a novel optical microphone probe, including a probe body 1, an end component 2 disposed at one end of the probe body 1, and a tail component 3 disposed at the other end of the probe body 1. When the sensing probe is in operation, the end component 2 receives sound waves and converts them into optical signals. The optical signals are input through the tail component 3, and the changes in input power can be detected to convert them into electrical signals for output.

[0025] The probe body 1 is used to install and support the end assembly 2 and the tail assembly 3. The probe body 1 includes a loose sleeve 11, a tail cap 12 disposed on the loose sleeve 11, and an outer sealing intermediate piece 13 disposed on the tail cap 12. The tail assembly 3 passes through the loose sleeve 11, and the end assembly 2 is disposed on the outer sealing intermediate piece 13. Specifically, the loose sleeve 11 is an anti-bend sleeve, and the loose sleeve 11 has a cavity for accommodating the tail assembly 3. The loose sleeve 11 is used to protect the tail assembly 3 from being broken.

[0026] The tail cap 12 is inserted into one end of the loose sleeve 11, and the outer sealing intermediate part 13 is connected to the end of the tail cap 12 away from the loose sleeve 11. In this embodiment, to facilitate the assembly of the tail cap 12 and the outer sealing intermediate part 13, the tail cap 12 has an internal thread, and the outer sealing intermediate part 13 has an external thread that mates with the internal thread. The outer sealing intermediate part 13 is locked and detached through the external thread and the internal thread of the tail cap 12. With this configuration, the tail cap 12 and the outer sealing intermediate part 13 can be positioned during installation, thereby facilitating assembly, accelerating assembly efficiency, and improving accuracy.

[0027] The end assembly 2 includes a standard 21, a collimating device 22, and a glass tube 23. The standard 21 and the collimating device 22 are connected by the glass tube 23. Each surface of the standard is provided with a high-reflectivity film (not shown in the figure), and the collimating device 22 faces the standard 21. Specifically, the collimating device 22 includes a C-lens 221 and a collimator head 222. One end of the collimator head 222 is connected to the tail assembly 3, and the other end of the collimator head 222 is connected to the C-lens 221. The standard 21 is located at the end of the C-lens 221 away from the collimator head 222.

[0028] In this embodiment, to protect the collimator 22 and the glass tube 23, the outer sealing intermediate member 13 has a mounting cavity. The collimator 22 and the glass tube 23 are inserted and installed in the mounting cavity. More specifically, the C-lens 221 and the collimator head 222 are inserted and fixed to one end of the glass tube 23, and the other end of the glass tube 23 is connected to the standard datum 21. Similarly, to protect the standard datum 21, the end assembly 2 also includes an end cap 24, which is snapped onto the end of the outer sealing intermediate member 13 away from the tail cap 12. For easy installation, the end cap 24 has a cap snap, and the outer sealing intermediate member 13 has an outer sealing groove. The end cap 24 is snapped onto the outer sealing intermediate member 13 through the cap snap. The end cap 24 has a receiving cavity, in which the standard datum 21 is fitted and installed. By providing the end cap 24, the standard datum 21 can be effectively protected.

[0029] In addition, the probe body 1 also includes a dustproof net, which is wrapped around the end cap 24. Specifically, the dustproof net can cover the inside of the end cap 24. The dustproof net can block external dust and debris, especially when the sensing probe is located in a complex environment. The dustproof net can effectively isolate dust and contaminants, thereby protecting the end cap 24 and the components located inside the end cap 24, extending the probe's service life and improving its reliability in complex environments.

[0030] To ensure accuracy, in this embodiment, the etalon 21 includes an FP etalon. The collimator head 222 works with the tail assembly 3 to provide a collimated beam output, reducing optical signal loss, and is responsible for alignment with the etalon 21 to optimize performance. Simultaneously, recoupling the return light carrying the sound signal into the tail assembly 3 improves coupling efficiency and reduces insertion loss. It is understood that the etalon 21 and collimator 22 can also use or incorporate other types of components.

[0031] The tail assembly 3 passes through the probe body 1 and connects to the collimating device 22. The tail assembly 3 includes a pigtail 31, which passes through the loose tube 11 and connects to the collimator head 222. With this configuration, the etalon 21 acts as a sensor. During operation, based on the filter principle, the laser beam output from the laser is transmitted to the collimating device 22 via the pigtail 31 of the tail assembly. After collimation, the beam enters the etalon 21. Because the etalon 21 is coated with a high-reflection film on both sides, the laser will be reflected multiple times within the cavity, resulting in strong resonance of the etalon 21 for certain specific wavelengths of light. External sound waves will cause a change in the air refractive index, causing a change in the wavelength filtered out by the cavity of the etalon 21. The light signal carrying sound information is output through the tail assembly 3, and the change in power can be converted into an electrical signal output. The sensor probe of this application has a compact structure, is easy to assemble, convenient to use, and resistant to interference, ensuring sensitivity even in complex environments.

[0032] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A novel optical microphone probe head characterized by, The probe body (1) includes an end assembly (2) arranged at one end of the probe body (1) and a tail assembly (3) arranged at the other end of the probe body (1); the end assembly (2) includes a etalon (21), a collimating device (22) and a glass tube (23), the etalon (21) is provided with a high reflection film, the etalon (21) and the collimating device (22) are connected through the glass tube (23), and the collimating device (22) faces the etalon (21); the tail assembly (3) is arranged in the probe body (1) and connected to the collimating device (22).

2. A novel optical microphone probe head as claimed in claim 1, wherein, The probe body (1) includes a loose sleeve (11), a tail cap (12) arranged on the loose sleeve (11) and an outer sealing intermediate piece (13) arranged on the tail cap (12); the tail assembly (3) is arranged in the loose sleeve (11); and the end assembly (2) is arranged on the outer sealing intermediate piece (13).

3. A novel optical microphone probe head as claimed in claim 2, wherein, The tail cap (12) is inserted into one end of the loose sleeve (11), and the outer sealing intermediate piece (13) is connected to the end of the tail cap (12) away from the loose sleeve (11).

4. A novel optical microphone probe head as claimed in claim 3, wherein, The tail cap (12) is provided with an internal thread, the outer sealing intermediate piece (13) is provided with an external thread, and the outer sealing intermediate piece (13) is connected to the tail cap (12) through the external thread and the internal thread.

5. A novel optical microphone probe head according to any one of claims 2-4, characterized in that, The outer sealing intermediate piece (13) has a mounting cavity, and the collimating device (22) and the glass tube (23) are inserted and mounted in the mounting cavity.

6. A novel optical microphone probe according to claim 5, characterized in that, The end assembly (2) further includes an end cap (24), the end cap (24) is snap-fitted and mounted at the end of the outer sealing intermediate piece (13) away from the tail cap (12), the end cap (24) has a receiving cavity, and the etalon (21) is embedded and mounted in the receiving cavity.

7. A novel optical microphone probe according to claim 6, characterized in that, The probe body (1) further includes a dustproof net, and the dustproof net is arranged on the end cap (24).

8. A novel optical microphone probe head according to any one of claims 2-4, characterized in that, The tail assembly (3) includes a tail fiber (31), and the tail fiber (31) is arranged in the loose sleeve (11) and connected to the collimating device (22).

9. A new optical microphone probe head according to claim 1, characterized in that, The etalon (21) includes an F-P etalon (21), and the collimating device (22) includes a C lens (221) and a collimator head (222).

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