Power transmission and transformation equipment voiceprint monitoring device and monitoring method thereof

Abstract

The invention relates to the technical field of voiceprint sensors, and discloses a power transmission and transformation equipment voiceprint monitoring device and a monitoring method thereof.The power transmission and transformation equipment voiceprint monitoring device comprises an active DFB optical fiber laser, a pumping interferometer photoelectric integrated module, an acquisition demodulation control module and a sound restoration display module; the active DFB optical fiber laser is connected with a first bidirectional optical fiber, the first bidirectional optical fiber is connected with a pumping interferometer photoelectric integrated module, the pumping interferometer photoelectric integrated module is connected with an acquisition demodulation control module, and the acquisition demodulation control module is connected with a sound restoration display module. The invention provides a power transmission and transformation equipment voiceprint monitoring device and a monitoring method thereof. The sensitivity and the precision of monitoring a voiceprint signal of power transmission and transformation equipment can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of voiceprint sensors, and in particular to a voiceprint monitoring device for power transmission and transformation equipment and a monitoring method thereof. Background Art

[0002] The acoustic and vibration signals generated by power equipment during operation contain a large amount of status information. Changes in voiceprints can reflect whether the equipment has defects or failures. Therefore, accurate identification of voiceprint information is very important, which helps operation and maintenance personnel diagnose equipment defects and identify the cause of the failure.

[0003] At present, the equipment for monitoring the voiceprint signal of power transmission and transformation equipment is usually a single-point optical fiber monitoring device. The single-point optical fiber monitoring device is easily affected by the optical path loss and has low sensitivity. Summary of the invention

[0004] The object of the present invention is to provide a power transmission and transformation equipment voiceprint monitoring device and a monitoring method thereof, which can improve the sensitivity and accuracy of the power transmission and transformation equipment voiceprint signal monitoring.

[0005] In order to achieve the above-mentioned object, the present invention provides a voiceprint monitoring device for power transmission and transformation equipment, comprising: an active DFB fiber laser, a pump interferometer optoelectronic integrated module, an acquisition and demodulation control module, and a sound restoration and display module;

[0006] The active DFB fiber laser is connected to a first bidirectional optical fiber, the first bidirectional optical fiber is connected to the pump interferometer optoelectronic integrated module, the pump interferometer optoelectronic integrated module is connected to the acquisition and demodulation control module, and the acquisition and demodulation control module is connected to the sound restoration and display module.

[0007] Preferably, there are a plurality of active DFB fiber lasers, and the plurality of active DFB fiber lasers are connected in series via a second bidirectional optical fiber.

[0008] Preferably, both the first bidirectional optical fiber and the second bidirectional optical fiber are provided with IWDM devices, and the IWDM devices include a wavelength division multiplexer and an isolator.

[0009] Preferably, the active DFB fiber laser comprises a housing and a fiber laser body;

[0010] The housing is provided with a groove, and the groove is used to place the fiber laser body;

[0011] The bottom of the groove is provided with an inlet and outlet fiber hole, the fiber laser body is connected to the first bidirectional optical fiber, and the first bidirectional optical fiber passes through the inlet and outlet fiber hole and is connected to the pump interferometer optoelectronic integrated module.

[0012] Preferably, the housing is provided with a fiber inlet hole and a fiber outlet hole, and the fiber inlet hole and the fiber outlet hole are both connected to the groove;

[0013] Two ends of the optical fiber laser body pass through the fiber entry hole and the fiber exit hole respectively.

[0014] Preferably, the active DFB fiber laser further comprises: a panel;

[0015] The panel is arranged on the housing, and the size of the panel is matched with the opening size of the groove;

[0016] The panel is provided with a plurality of honeycomb sound pickup holes.

[0017] Preferably, the active DFB fiber laser further comprises: a diaphragm;

[0018] The diaphragm is installed in the groove, and the fiber laser body is attached to the lower surface of the diaphragm.

[0019] Preferably, the fiber laser body is coated with thermal conductive silicone grease.

[0020] Preferably, the acquisition and demodulation control module is composed of an ADC chip, an ARM processor, an FPGA module and a communication chip.

[0021] Preferably, the pump interferometer optoelectronic integrated module consists of a pump, an unbalanced Michelson interferometer, a splitter, a circulator, an optoelectronic conversion circuit and a WDM wavelength division multiplexer.

[0022] The present invention provides a monitoring method based on the above-mentioned power transmission and transformation equipment voiceprint monitoring device, comprising the following steps:

[0023] The pump interferometer optoelectronic integrated module emits pump light of a first preset threshold wavelength; the pump light reaches the active DFB fiber laser through the first bidirectional optical fiber;

[0024] The active DFB fiber laser is excited to convert the collected voiceprint signal into an optical signal, and emits a reflected light of a second preset threshold wavelength, and the reflected light returns to the pump interferometer optoelectronic integrated module through the first bidirectional optical fiber;

[0025] The pump interferometer optoelectronic integrated module converts the reflected light into a voltage signal and transmits it to the acquisition and demodulation control module. The acquisition and demodulation control module demodulates the voltage signal to obtain a voiceprint signal and processes it and transmits it to the sound restoration and display module. The sound restoration and display module restores the voiceprint signal into a waveform for display.

[0026] Compared with the prior art, the voiceprint monitoring device and monitoring method of power transmission and transformation equipment in the embodiment of the present invention have the following beneficial effects:

[0027] 1. Active DFB fiber laser is an active phase-shift grating that is sensitive to vibration signals. Because of its narrow line width, it is easy to sense subtle changes in the outside world and has high sensitivity. This application uses active DFB fiber laser as a voiceprint sensor to collect voiceprint signals, which can improve the sensitivity of the entire monitoring device.

[0028] 2. The pump interferometer optoelectronic integrated module emits pump light of the first preset threshold wavelength, and the pump light reaches the active DFB fiber laser through the first bidirectional optical fiber. The active DFB fiber laser is excited to convert the collected voiceprint signal into an optical signal, and emits reflected light of the second preset threshold wavelength. The reflected light returns to the pump interferometer optoelectronic integrated module through the first bidirectional optical fiber. The pump interferometer optoelectronic integrated module converts the optical signal into a voltage signal internally and transmits it to the acquisition and demodulation control module. After the acquisition and demodulation control module demodulates the voltage signal to obtain the voiceprint signal, it uses digital signal processing technology to filter, amplify and extract features of the voiceprint signal, extracts the voiceprint feature parameters closely related to the device status, and then transmits it to the sound restoration display module. The sound restoration display module restores the voiceprint signal into a waveform for display, realizes real-time monitoring and analysis of the characteristic parameters of the voiceprint signal, can identify changes in the operating status of the equipment, and warn of potential faults in advance.

[0029] The present application processes the voiceprint signal through an acquisition and demodulation control module, and the obtained monitoring result has high accuracy, which can improve the accuracy of the entire monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a voiceprint monitoring device for power transmission and transformation equipment according to an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a voiceprint monitoring device for power transmission and transformation equipment according to another embodiment of the present invention;

[0032] Figure 3 It is a schematic structural diagram of the housing, the fiber inlet hole, the fiber outlet hole, the fiber inlet and outlet holes and the groove according to an embodiment of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the panel and honeycomb sound pickup hole according to an embodiment of the present invention;

[0034] In the figure, 1. active DFB fiber laser; 2. diaphragm; 3. IWDM device; 4. first bidirectional optical fiber; 5. second bidirectional optical fiber; 6. fiber inlet hole; 7. fiber outlet hole; 8. fiber inlet and outlet holes; 9. panel; 10. honeycomb pickup hole; 12. groove; 11. shell; 13. pump interferometer optoelectronic integrated module; 14. acquisition demodulation control module; 15. sound restoration display module. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0037] In the description of the present invention, it should be understood that the terms "first", "second" and "third" used in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. Moreover, in addition to being used to indicate orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0038] The full names of the English abbreviations in the present invention are explained as follows:

[0039] DFB: Distributed Feedback Lase;

[0040] ADC: Analogto digital converter;

[0041] ARM: Acorn RISC Machine;

[0042] FPGA: Field Programmable Gate Array;

[0043] PC:Personal Computer;

[0044] WDM: Wavelength Division Multiplexing.

[0045] like Figure 1-2 As shown, a power transmission and transformation equipment voiceprint monitoring device according to an embodiment of the present invention comprises: an active DFB fiber laser 1, a pump interferometer optoelectronic integrated module 13, an acquisition and demodulation control module 14 and a sound restoration and display module 15;

[0046] The active DFB fiber laser 1 is connected to a first bidirectional optical fiber 4 , which is connected to a pump interferometer optoelectronic integrated module 13 , which is connected to a collection and demodulation control module 14 , which is connected to a sound restoration and display module 15 .

[0047] It should be noted that the active DFB fiber laser 1 is an active phase-shift grating, which is sensitive to vibration signals. Because of its narrow line width, it is easy to perceive subtle changes in the outside world and has high sensitivity. The present application uses the active DFB fiber laser 1 as a voiceprint sensor to collect voiceprint signals, which can improve the sensitivity of the entire monitoring device;

[0048] The pump interferometer optoelectronic integrated module 13 emits pump light of a first preset threshold wavelength, and the pump light reaches the active DFB fiber laser 1 through the first bidirectional optical fiber 4. The active DFB fiber laser 1 is excited to convert the collected voiceprint signal into an optical signal, and emits reflected light of a second preset threshold wavelength. The reflected light returns to the pump interferometer optoelectronic integrated module 13 through the first bidirectional optical fiber 4. The pump interferometer optoelectronic integrated module 13 converts the optical signal into a voltage signal internally and transmits it to the acquisition and demodulation control module 14. After the acquisition and demodulation control module 14 demodulates the voltage signal to obtain the voiceprint signal, it uses digital signal processing technology to filter, amplify and extract features of the voiceprint signal, extracts voiceprint feature parameters closely related to the device status, and then transmits it to the sound restoration display module 15. The sound restoration display module 15 restores the voiceprint signal into a waveform for display, realizes real-time monitoring and analysis of the characteristic parameters of the voiceprint signal, can identify changes in the operating status of the equipment, and warns of potential faults in advance.

[0049] The present application processes the voiceprint signal through the acquisition and demodulation control module 14, and the obtained monitoring result has high accuracy, which can improve the accuracy of the entire monitoring device.

[0050] See also Figure 2 In a more specific embodiment, a plurality of active DFB fiber lasers 1 are provided, and the plurality of active DFB fiber lasers 1 are connected in series via a second bidirectional optical fiber 5 .

[0051] It should be noted that by connecting multiple active DFB fiber lasers 1 in series, each active DFB fiber laser 1 can monitor the same power transmission and transformation equipment at different locations, or monitor different power transmission and transformation equipment. Since the length of the series connection can be very long, it is possible to realize the monitoring of the voiceprint signal of a remote device;

[0052] The pump light can enter the multiple active DFB fiber lasers 1 in sequence through the second bidirectional optical fiber 5. The multiple active DFB fiber lasers 1 are excited to emit reflected light, and the reflected light can also return from the second bidirectional optical fiber 5 and return to the pump interferometer optoelectronic integrated module 13 through the series line.

[0053] See also Figure 2 The first bidirectional optical fiber 4 and the second bidirectional optical fiber 5 are both provided with an IWDM device 3, and the IWDM device 3 includes a wavelength division multiplexer and an isolator.

[0054] It should be noted that the IWDM device 3 integrates a wavelength division multiplexer and an isolator, and has a dual port of one input and one output. The function of the IWDM device 3 is that when the active DFB fiber laser 1 emits the reflected light of the second preset threshold wavelength and returns to the pump interferometer optoelectronic integrated module 13, the IWDM device 3 can isolate the light of the first preset threshold wavelength to prevent diffuse reflection from interfering, and only allow the reflected light of the second preset threshold wavelength to return.

[0055] For example, the pump interferometer optoelectronic integrated module 13 emits 1480nm pump light, the active DFB fiber laser 1 is excited to emit 1550nm reflected light, the IWDM device 3 isolates the 1480nm light and allows the 1550nm light to return to the pump interferometer optoelectronic integrated module 13 .

[0056] See also Figure 3 In a more specific embodiment, the active DFB fiber laser 1 includes a housing 11 and a fiber laser body (not shown in the figure);

[0057] The housing 11 is provided with a groove 12, and the groove 12 is used to place the fiber laser body;

[0058] A fiber inlet and outlet hole 8 is provided at the bottom of the groove 12 . The fiber laser body is connected to the first bidirectional optical fiber 4 . The first bidirectional optical fiber 4 passes through the fiber inlet and outlet hole 8 and is connected to the pump interferometer optoelectronic integrated module 13 .

[0059] It should be noted that a groove 12 is hollowed out on the housing 11 to place the fiber laser body, and the active DFB fiber laser 1 is formed as a whole. The housing 11 can effectively prevent the fiber laser body from being damaged by collision;

[0060] The material of the housing 11 is aluminum alloy. Figure 3The shape of the middle shell 11 is a cuboid, and the shape of the groove 12 is a semi-cylinder, but the shapes of the shell 11 and the groove 12 are not limited;

[0061] The first bidirectional optical fiber 4 passes through the fiber inlet and outlet hole 8 to connect with the pump interferometer optoelectronic integrated module 13. In addition, the second bidirectional optical fiber 5 also passes through the fiber inlet and outlet hole 8 to connect with another active DFB fiber laser 1, which is conducive to organizing the optical fiber line and avoiding clutter.

[0062] See also Figure 3 In a more specific embodiment, the housing 11 is provided with a fiber inlet hole 6 and a fiber outlet hole 7, and both the fiber inlet hole 6 and the fiber outlet hole 7 are connected to the groove 12;

[0063] Two ends of the optical fiber laser body pass through the fiber entry hole 6 and the fiber exit hole 7 respectively.

[0064] It should be noted that the fiber laser body can pass through the fiber inlet hole 6 on the housing 11 into the groove 12 and then be drawn out through the fiber outlet hole 7 .

[0065] See also Figure 4 , in a more specific embodiment, the active DFB fiber laser 1 further comprises: a panel 9;

[0066] The panel 9 is arranged on the housing 11, and the size of the panel 9 is adapted to the opening size of the groove 12;

[0067] A plurality of honeycomb sound pickup holes 10 are provided on the panel 9 .

[0068] It should be noted that the panel 9 is disposed on the housing 11 , and the size of the panel 9 is adapted to the opening size of the groove 12 , so that the panel 9 can cover the groove 12 ;

[0069] The panel 9 is provided with a plurality of honeycomb sound pickup holes 10, which can gather external sound and transmit it into the groove 12, so that the fiber laser body can collect the voiceprint signal;

[0070] The panel 9 is an alloy panel, but its material is not limited.

[0071] See also Figure 1 , in a more specific embodiment, the active DFB fiber laser 1 further includes: a diaphragm 2;

[0072] The diaphragm 2 is installed in the groove 12 , and the fiber laser body (not shown in the figure) is attached to the lower surface of the diaphragm 2 .

[0073] It should be noted that the diaphragm 2 is placed in the middle and upper part of the groove 12 through a shock-absorbing rubber strip, the upper surface of the diaphragm 2 is parallel to the opening of the groove 12, and the fiber laser body is attached to the lower surface of the diaphragm 2 to form a sensitivity-enhancing structure to enhance the sensitivity to sound;

[0074] The diaphragm 2 is preferably a wood fiber diaphragm.

[0075] In a more specific embodiment, the fiber laser body is coated with thermal grease.

[0076] It should be noted that the fiber laser body is coated with thermal grease to provide protection.

[0077] In a more specific embodiment, the acquisition and demodulation control module 14 is composed of an ADC chip, an ARM processor, an FPGA module and a communication chip.

[0078] It should be noted that the ADC chip is a multi-channel high-speed ADC chip with a sampling rate of more than 1M, has gigabit network port communication capability, and is highly integrated.

[0079] In a more specific embodiment, the pump interferometer optoelectronic integrated module 13 is composed of a pump, an unbalanced Michelson interferometer, a splitter, a circulator, an optoelectronic conversion circuit and a WDM wavelength division multiplexer.

[0080] It should be noted that the pump interferometer optoelectronic integrated module 13 is composed of a 1480nm pump, an unbalanced Michelson interferometer, a splitter, a circulator, an optoelectronic conversion circuit and a WDM wavelength division multiplexer.

[0081] In a more specific embodiment, the sound restoration display module 15 is composed of a PC host and a corresponding display, and has the ability to restore sound of the host computer software.

[0082] A monitoring method of a voiceprint monitoring device for power transmission and transformation equipment according to an embodiment of the present invention comprises the following steps:

[0083] The pump interferometer optoelectronic integrated module 13 emits pump light of a first preset threshold wavelength; the pump light reaches the active DFB fiber laser 1 through the first bidirectional optical fiber 4;

[0084] The active DFB fiber laser 1 is excited to convert the collected voiceprint signal into an optical signal, and emits a reflected light of a second preset threshold wavelength, and the reflected light returns to the pump interferometer optoelectronic integrated module 13 through the first bidirectional optical fiber 4;

[0085] The pump interferometer optoelectronic integrated module 13 converts the reflected light into a voltage signal and transmits it to the acquisition and demodulation control module 14. The acquisition and demodulation control module 14 demodulates the voltage signal to obtain a voiceprint signal and transmits it to the sound restoration display module 15 after processing. The sound restoration display module restores the voiceprint signal into a waveform for display.

[0086] It should be noted that, preferably, the first preset threshold wavelength is 1480 nm, and the second preset threshold wavelength is 1550 nm.

[0087] In summary, the embodiment of the present invention provides a power transmission and transformation equipment voiceprint monitoring device and a monitoring method thereof, which uses an active DFB fiber laser 1 as a voiceprint sensor to collect voiceprint signals. The active DFB fiber laser 1 is an active phase-shift grating, which is sensitive to vibration signals. Because of its narrow line width, it is easy to perceive subtle changes in the outside world and has high sensitivity. The present application uses an active DFB fiber laser 1 as a voiceprint sensor to collect voiceprint signals, which can improve the sensitivity of the entire monitoring device;

[0088] The pump interferometer optoelectronic integrated module 13 emits pump light of a first preset threshold wavelength, and the pump light reaches the active DFB fiber laser 1 through the first bidirectional optical fiber 4. The active DFB fiber laser 1 is excited to convert the collected voiceprint signal into an optical signal, and emits reflected light of a second preset threshold wavelength. The reflected light returns to the pump interferometer optoelectronic integrated module 13 through the first bidirectional optical fiber 4. The pump interferometer optoelectronic integrated module 13 converts the optical signal into a voltage signal internally and transmits it to the acquisition and demodulation control module 14. After the acquisition and demodulation control module 14 demodulates the voltage signal to obtain the voiceprint signal, it uses digital signal processing technology to filter, amplify and extract features of the voiceprint signal, extracts voiceprint feature parameters closely related to the device status, and then transmits it to the sound restoration display module 15. The sound restoration display module 15 restores the voiceprint signal into a waveform for display, realizes real-time monitoring and analysis of the characteristic parameters of the voiceprint signal, can identify changes in the operating status of the equipment, and warns of potential faults in advance.

[0089] The present application processes the voiceprint signal through the acquisition and demodulation control module 14, and the obtained monitoring result has high accuracy, which can improve the accuracy of the entire monitoring device.

[0090] The present invention provides a power transmission and transformation equipment voiceprint monitoring device and a monitoring method thereof, which can improve the sensitivity and accuracy of monitoring the voiceprint signal of the power transmission and transformation equipment.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A voiceprint monitoring device for power transmission and transformation equipment, characterized in that: include: Active DFB fiber laser (1), pump interferometer optoelectronic integrated module (13), acquisition demodulation control module (14) and sound restoration display module (15); The active DFB fiber laser (1) is connected to a first bidirectional optical fiber (4), the first bidirectional optical fiber (4) is connected to the pump interferometer optoelectronic integrated module (13), the pump interferometer optoelectronic integrated module (13) is connected to the acquisition and demodulation control module (14), and the acquisition and demodulation control module (14) is connected to the sound restoration display module (15).

2. The power transmission and transformation equipment voiceprint monitoring device according to claim 1, characterized in that: A plurality of active DFB fiber lasers (1) are provided, and the plurality of active DFB fiber lasers (1) are connected in series via a second bidirectional optical fiber (5).

3. The power transmission and transformation equipment voiceprint monitoring device according to claim 2, characterized in that: The first bidirectional optical fiber (4) and the second bidirectional optical fiber (5) are both provided with an IWDM device (3), and the IWDM device (3) comprises a wavelength division multiplexer and an isolator.

4. The power transmission and transformation equipment voiceprint monitoring device according to claim 1, characterized in that: The active DFB fiber laser (1) comprises a housing (11) and a fiber laser body; The housing (11) is provided with a groove (12), and the groove (12) is used to place the fiber laser body; The bottom of the groove (12) is provided with an inlet and outlet fiber hole (8), the fiber laser body is connected to the first bidirectional optical fiber (4), and the first bidirectional optical fiber (4) passes through the inlet and outlet fiber hole (8) to be connected to the pump interferometer optoelectronic integrated module (13).

5. The power transmission and transformation equipment voiceprint monitoring device according to claim 4, characterized in that: The housing (11) is provided with a fiber inlet hole (6) and a fiber outlet hole (7), and the fiber inlet hole (6) and the fiber outlet hole (7) are both connected to the groove (12); Two ends of the optical fiber laser body pass through the fiber entry hole (6) and the fiber exit hole (7) respectively.

6. The power transmission and transformation equipment voiceprint monitoring device according to claim 4, characterized in that: The active DFB fiber laser (1) further comprises: a panel (9); The panel (9) is arranged on the housing (11), and the size of the panel (9) is matched with the opening size of the groove (12); The panel (9) is provided with a plurality of honeycomb sound pickup holes (10).

7. The power transmission and transformation equipment voiceprint monitoring device according to claim 4, characterized in that: The active DFB fiber laser (1) further comprises: a diaphragm (2); The diaphragm (2) is installed in the groove (12), and the fiber laser body is attached to the lower surface of the diaphragm (2).

8. The power transmission and transformation equipment voiceprint monitoring device according to claim 1, characterized in that: The acquisition and demodulation control module (14) is composed of an ADC chip, an ARM processor, an FPGA module and a communication chip.

9. The power transmission and transformation equipment voiceprint monitoring device according to claim 1, characterized in that: The pump interferometer optoelectronic integrated module (13) consists of a pump, an unbalanced Michelson interferometer, a splitter, a circulator, an optoelectronic conversion circuit and a WDM wavelength division multiplexer.

10. A monitoring method based on the voiceprint monitoring device for power transmission and transformation equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: The pump interferometer optoelectronic integrated module (13) emits pump light of a first preset threshold wavelength; the pump light reaches the active DFB fiber laser (1) through the first bidirectional optical fiber (4); The active DFB fiber laser (1) is excited to convert the collected voiceprint signal into an optical signal, and emits reflected light of a second preset threshold wavelength, and the reflected light returns to the pump interferometer optoelectronic integrated module (13) through the first bidirectional optical fiber (4); The pump interferometer optoelectronic integrated module (13) converts the reflected light into a voltage signal and transmits it to the acquisition and demodulation control module (14); the acquisition and demodulation control module (14) demodulates the voltage signal to obtain a voiceprint signal and transmits it to the sound restoration display module (15); the sound restoration display module restores the voiceprint signal into a waveform for display.

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