High-speed accumulation card residual noise suppression device and suppression method

Abstract

The application relates to a high-speed accumulated card residual noise suppression device and a suppression method. The device solves the problems of poor residual noise suppression effect and complex operation process in the prior art signal processing system, and is convenient to use. The device comprises a ring pulse generator, the ring pulse generator is connected with a crystal oscillator, the crystal oscillator is arranged in an oscillation circuit with an adjustable clock source, the crystal oscillator is connected with phase-locked loops located in different subsystems, the oscillation circuit is connected with a noise monitoring mechanism, the oscillation circuit is arranged in a clock phase adjustment box through a circuit mounting plate, and the clock phase adjustment box is connected with an accumulated gap monitoring system. The device has the advantages of good residual noise suppression effect, simple operation and convenient use.

Description

Technical Field

[0001] This invention relates to the field of noise control technology, specifically to a high-speed accumulator residual noise suppression device and method. Background Technology

[0002] Signals acquired by the front end of a signal processing system are affected by environmental and equipment factors, resulting in significant noise contamination. Furthermore, issues such as long-distance sound pickup can lead to low signal levels and low intelligibility. To improve signal clarity, signal processing systems perform automatic gain control and noise suppression after signal acquisition to increase signal level, reduce noise, and thus enhance clarity and intelligibility. However, existing signal processing systems cannot update noise levels for signals with changing signal-to-noise ratios, resulting in residual noise in the output signal. In addition, existing high-speed accumulator cards use highly stable crystal oscillators for clock synchronization. The portion of the signal noise synchronized with the clock is not accumulated and suppressed; when fully synchronized, there is no suppression effect, and the noise easily accumulates to form peaks, generating short-duration high-frequency noise. This results in poor performance, complex operation, cumbersome processes, and inconvenience.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a noise suppression device and method [CN201210562803.7], which includes acquiring the characteristic parameters of the current signal frame and generating an auxiliary update flag based on the characteristic parameters; adjusting the gain of the current signal frame rate; updating the noise of the current signal frame rate after gain adjustment based on the auxiliary update flag; and suppressing the noise of the current signal frame rate.

[0004] The above solution has solved to some extent the problem that the signal processing system in the prior art cannot update the noise of signals with changes in signal-to-noise ratio, resulting in residual noise in the output signal. However, the solution still has many shortcomings. For example, the part of the signal noise that is synchronized with the clock will not be accumulated and suppressed. When fully synchronized, there is no suppression effect. Moreover, it is easy to superimpose to form peaks, generating short-term high-frequency noise, resulting in poor performance. In addition, the operation method is complicated, the process is cumbersome, and it is inconvenient to use. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a high-speed accumulator card residual noise suppression device that is reasonably designed and has good performance.

[0006] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed and easy-to-use method for suppressing residual noise in high-speed accumulator cards.

[0007] To achieve the above objectives, the present invention employs the following technical solution: This high-speed accumulation card residual noise suppression device includes a ring pulse generator connected to a crystal oscillator. The crystal oscillator is housed within an oscillation circuit with an adjustable clock source and connected to a phase-locked loop located in a different subsystem. The oscillation circuit is connected to a noise monitoring mechanism, which is mounted in a clock phase adjustment box via a circuit mounting plate. The clock phase adjustment box is connected to an accumulation gap monitoring system. The adjustable clock source prevents signal noise from accumulating with the clock signal, and the noise monitoring mechanism monitors the residual noise level in real time. The accumulation gap is detected by the accumulation gap monitoring system. The clock phase is adjusted by randomly adjusting the adjustable clock source and the signal duration based on the length of the accumulation gap. The residual noise phase changes randomly during each accumulation process, greatly reducing the occurrence of peak values ​​due to superimposed noise, resulting in short-term high-frequency noise. This method yields excellent performance.

[0008] In the aforementioned high-speed accumulator residual noise suppression device, a clock phase adjustment box has a clock phase display screen at one end, which is connected to an adjustable clock source. A manual clock phase adjustment knob is located on one side of the clock phase display screen. The clock phase adjustment box has heat dissipation channels on both sides, with sound-absorbing sponges inside. These sponges are in close contact with strip-shaped heat dissipation vents on the inner wall of the clock phase adjustment box. The clock phase display screen allows for real-time observation of the adjustable clock's phase data, and the manual clock phase adjustment knob facilitates easy manual adjustment of the clock phase.

[0009] In the aforementioned high-speed accumulator residual noise suppression device, a wiring area is located at the end of the clock phase adjustment box furthest from the clock phase display screen. This wiring area includes a generator pulse signal input port, and a clock pulse signal output port is located above the generator pulse signal input port. Both the generator pulse signal input port and the clock generator pulse signal input port are connected to an adjustable clock source via a signal transmission cable. Sound-insulating material is provided on the outer circumference of both ends of the signal transmission cable. The sound-insulating material effectively reduces noise from the pulse signal.

[0010] In the aforementioned high-speed accumulator residual noise suppression device, the noise monitoring mechanism includes a noise level display screen mounted on the upper part of the clock phase adjustment housing. A first noise monitoring module is connected to the ring pulse generator, and a second noise monitoring module is mounted on the adjustable clock source. Both the first and second noise monitoring modules have circumferential noise collection structures connected to the noise level display screen. The noise collection structure includes a pulse signal protection shell, with a noise collection box on the inner circumferential side of the pulse signal protection shell. The first and second noise monitoring modules are respectively housed within their respective noise collection boxes. The noise collection boxes have several staggered strip-shaped audio collection slots circumferentially arranged, and several audio collection holes at the upper end. The noise collection boxes are fixedly mounted in a positioning seat at the bottom of the pulse signal protection shell, and a connecting base is located at the bottom of the pulse signal protection shell. The bottom of the first or second noise monitoring module is welded to the corresponding ring pulse generator and adjustable clock source via oscillating noise collection strips. This noise monitoring mechanism facilitates timely understanding of the original signal and the emitted signal noise.

[0011] In the aforementioned high-speed accumulator residual noise suppression device, the accumulation gap monitoring system includes a pulse signal counting module mounted on a ring pulse generator. This pulse signal counting module is connected to a pulse gap timing module mounted on a clock phase adjustment housing. The pulse gap timing module is then connected to a clock phase control module mounted on a circuit mounting plate. The accumulation gap monitoring system effectively detects the length of the accumulation gap, thereby accurately adjusting the phase of the adjustable clock source.

[0012] Based on the above-mentioned high-speed accumulator residual noise suppression device, a method for suppressing high-speed accumulator residual noise is provided, which includes the following steps:

[0013] S1. The ring pulse generator outputs a pulse signal, which is transmitted to the adjustable clock source through the signal transmission connection line. The adjustable clock source provides a clock pulse signal through the crystal oscillator.

[0014] S2. The first noise monitoring module detects the pulse signal input from the ring pulse generator, and the second noise monitoring module detects the noise in the clock pulse signal output from the adjustable clock source.

[0015] S3, the pulse signal counting module counts the number of pulse signals emitted by the ring pulse generator, and the pulse gap counting module times the interval between two adjacent pulse signals;

[0016] S4. The clock phase control module randomly adjusts the clock pulse signal output time and clock phase of the adjustable clock source according to the number of pulse signal accumulations and the interval between two adjacent pulse signals.

[0017] In the above-described method for suppressing residual noise in a high-speed accumulator card, in step S1, a crystal oscillator works in conjunction with a phase-locked loop (PLL) to provide the required clock pulse signal frequency. Clock pulse signals of different frequencies are provided through PLLs in different subsystems. This configuration improves the accuracy of the clock pulse signal frequency.

[0018] In the above-described method for suppressing residual noise in a high-speed accumulator card, in step S2, the first noise monitoring module is used to detect the original noise, and the second noise monitoring module is used to detect the residual noise. The input pulse signal and the output clock pulse signal are detected separately to effectively determine the source of the residual noise.

[0019] In the above-described method for suppressing residual noise in a high-speed accumulator card, in step S3, the changes in the number of pulse signals and the interval duration are synchronized with the clock pulse signal. This effectively suppresses residual noise.

[0020] In the above-described method for suppressing residual noise in a high-speed accumulator card, in step S4, the phase of the adjustable clock source can also be manually adjusted using a clock phase manual adjustment knob. While the clock phase manual adjustment knob allows for manual adjustment, the clock phase control module can achieve automatic adjustment, offering flexibility in use.

[0021] Compared with existing technologies, the advantages of this invention are: reasonable design and simple structure. It uses an adjustable clock source to replace the traditional stable clock. According to the accumulation gap monitoring system, the clock phase is adjusted by randomly adjusting the adjustable clock source and duration, so that the residual noise phase of each accumulation process changes randomly, effectively reducing the probability of residual noise superimposing to form a peak. It is not only simple in structure, but also convenient to operate and has good performance. Attached Figure Description

[0022] Figure 1 This is a block diagram showing the overall structure and connection of the present invention;

[0023] Figure 2 This is a partial structural connection block diagram of the present invention;

[0024] Figure 3 This is a half-sectional view of the clock phase adjustment box in this invention;

[0025] Figure 4 This is a side sectional view of the clock phase adjustment box in this invention;

[0026] Figure 5 This is a front view of the clock phase adjustment box in this invention;

[0027] Figure 6 This is a schematic diagram of the noise collection structure in this invention;

[0028] Figure 7 This is a cross-sectional view of the noise collection structure in this invention.

[0029] In the diagram, the components are: 1. Ring pulse generator; 11. Crystal oscillator; 12. Adjustable clock source; 13. Phase-locked loop; 14. Oscillation circuit; 15. Circuit mounting plate; 2. Noise monitoring mechanism; 21. Noise level display screen; 22. First noise monitoring module; 23. Second noise monitoring module; 3. Clock phase adjustment box; 31. Clock phase display screen; 32. Clock phase manual adjustment knob; 33. Heat dissipation channel; 34. Sound-absorbing sponge; 35. Strip-shaped heat dissipation vent; 4. Accumulation gap monitoring system; 41. Pulse signal counting module; 42. Pulse gap timing module; 43. Clock phase control module; 5. Wiring area; 51. Generator pulse signal input port; 52. Clock pulse signal output port; 53. Signal transmission connection line; 54. Sound insulation material; 6. Noise collection structure; 61. Pulse signal protective shell; 62. Noise collection box; 63. Strip-shaped audio collection slot; 64. Audio collection hole; 65. Positioning seat; 66. Connecting base; 67. Oscillation noise collection strip. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-7 As shown, this high-speed accumulator card residual noise suppression device includes a ring pulse generator 1, which is connected to a crystal oscillator 11. The crystal oscillator 11 is disposed in an oscillation circuit 14 with an adjustable clock source 12, and the crystal oscillator 11 is connected to a phase-locked loop 13 located in a different subsystem. The oscillation circuit 14 is connected to a noise monitoring mechanism 2, and the oscillation circuit 14 is disposed in a clock phase adjustment box 3 through a circuit mounting plate 15. The clock phase adjustment box 3 is connected to an accumulation gap monitoring system 4. By replacing the traditional stable clock source with an adjustable clock source 12 in the oscillation circuit 14, and using the accumulation gap monitoring system 4 to detect the pulse signal gap duration emitted by the ring pulse generator 1 each time, the clock phase is adjusted by randomly adjusting the adjustable clock source 12 and the pulse signal duration according to the pulse signal gap duration. This causes the residual noise phase of each accumulation process to change randomly, thereby reducing the probability of residual noise superimposing to form a peak. In other words, the narrow bandwidth residual noise is redistributed to a large bandwidth, reducing the residual noise peak. The noise monitoring mechanism 2 detects the residual noise at any time, which facilitates the adjustment of the phase of the adjustable clock source 12 at any time.

[0032] The clock phase adjustment housing 3 has a clock phase display screen 31 at one end, which is connected to the adjustable clock source 12. A manual clock phase adjustment knob 32 is located on one side of the clock phase display screen 31. The clock phase adjustment housing 3 has heat dissipation channels 33 on both sides, with sound-absorbing sponges 34 installed inside. The sound-absorbing sponges 34 are in close contact with strip-shaped heat dissipation vents 35 located on the inner wall of the clock phase adjustment housing 3. The clock phase display screen 31 displays the phase of the adjustable clock source 12 in real time. If the noise level display screen 21 detects a peak in residual noise, the phase is adjusted using the manual clock phase adjustment knob 32.

[0033] As can be seen, the end of the clock phase adjustment box 3 away from the clock phase display screen 31 is provided with a wiring area 5. The wiring area 5 is provided with a generator pulse signal input port 51. The upper end of the generator pulse signal input port 51 is provided with a clock pulse signal output port 52. The generator pulse signal input port 51 and the clock generator pulse signal input port 51 are connected to the adjustable clock source 12 through a signal transmission connection line 53. Both ends of the signal transmission connection line 53 are provided with sound insulation material 54 on the outer circumference.

[0034] Obviously, the noise monitoring mechanism 2 includes a noise level display screen 21 mounted on the upper end of the clock phase adjustment housing 3, a first noise monitoring module 22 connected to the ring pulse generator 1, and a second noise monitoring module 23 mounted on the adjustable clock source 12. The first noise monitoring module 22 and the second noise monitoring module 23 are circumferentially provided with a noise collection structure 6, and the first noise monitoring module 22 and the second noise monitoring module 23 are respectively connected to the noise level display screen 21. The noise collection structure 6 includes a pulse signal protection shell 61, and a noise collection box 62 is provided circumferentially inside the pulse signal protection shell 61. Noise monitoring module 22 and noise monitoring module 23 are respectively installed in their respective noise collection boxes 62. Each noise collection box 62 has several staggered strip-shaped audio collection slots 63 circumferentially arranged, and several audio collection holes 64 at its upper end. The noise collection box 62 is fixedly installed in a positioning seat 65 at the bottom of a pulse signal protection shell 61, and a connecting base 66 is provided at the bottom of the pulse signal protection shell 61. The bottom of either the first noise monitoring module 22 or the second noise monitoring module 23 is welded to the corresponding ring pulse generator and adjustable clock source 12 via oscillating noise collection strips 67. The first noise monitoring module 22 and the second noise monitoring module 23 perform separate detection, improving the accuracy of detecting the source location of residual noise, and the noise collection structure 6 effectively improves the quality of noise detection.

[0035] Furthermore, the accumulation gap monitoring system 4 includes a pulse signal counting module 41 mounted on the ring pulse generator 1. The pulse signal counting module 41 is connected to a pulse gap timing module 42 mounted on the clock phase adjustment housing 3. The pulse gap timing module 42 is connected to a clock phase control module 43 mounted on the circuit mounting plate 15. The clock phase control module 43 automatically adjusts the phase of the adjustable clock source 12 according to the duration of the pulse signal accumulation gap detected by the pulse gap timing module 42.

[0036] A method for suppressing residual noise in high-speed accumulator cards, comprising the following steps:

[0037] S1. The ring pulse generator 1 outputs a pulse signal, which is transmitted to the adjustable clock source 12 through the signal transmission connection line 53. The adjustable clock source 12 provides a clock pulse signal through the crystal oscillator 11.

[0038] S2. The first noise monitoring module 22 detects the pulse signal input to the ring pulse generator 1, and the second noise monitoring module 23 detects the noise of the clock pulse signal output by the adjustable clock source 12.

[0039] S3, the pulse signal counting module 41 counts the number of pulse signals emitted by the ring pulse generator 1, and the pulse gap counting module counts the duration of the gap between two adjacent pulse signals;

[0040] S4. The clock phase control module 43 randomly adjusts the clock pulse signal output time and clock phase of the adjustable clock source 12 according to the number of pulse signal accumulations and the interval between two adjacent pulse signals.

[0041] In step S1, the crystal oscillator 11 works in conjunction with the phase-locked loop 13 to provide the required clock pulse signal frequency. Clock pulse signals of different frequencies are provided by phase-locked loops 13 within different subsystems. The phase-locked loop 13 uses the input reference signal to control the frequency and phase of the oscillation signal of the crystal oscillator 11, thereby achieving automatic tracking of the output signal frequency to the input signal frequency.

[0042] Specifically, in step S2, the first noise monitoring module 22 is used to detect the original noise, and the second noise monitoring module 23 is used to detect the residual noise. This configuration helps to improve the accuracy of determining the location of residual noise.

[0043] Preferably, in step S3, the changes in the number of pulse signals and the interval duration are synchronized with the clock pulse signal.

[0044] Furthermore, in step S4, the phase of the adjustable clock source 12 can also be manually adjusted by the clock phase manual adjustment knob 32.

[0045] In summary, the principle of this embodiment is as follows: by setting an adjustable clock source 12 in the oscillation circuit 14 to replace the traditional stable clock source, the accumulation gap monitoring system 4 detects the pulse signal gap duration emitted by the ring pulse generator 1 each time, and adjusts the clock phase by randomly adjusting the adjustable clock source 12 and the pulse signal duration according to the pulse signal gap duration, so that the residual noise phase of each accumulation process changes randomly, thereby reducing the probability of residual noise superimposing to form a peak.

[0046] Among them, the noise monitoring mechanism 2 can detect residual noise at any time, and the phase can be adjusted at any time using the clock phase manual adjustment knob 32.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0048] Although this paper uses a lot of terms such as ring pulse generator 1, crystal oscillator 11, adjustable clock source 12, phase-locked loop 13, oscillation circuit 14, circuit mounting plate 15, noise monitoring mechanism 2, noise level display screen 21, first noise monitoring module 22, second noise monitoring module 23, clock phase adjustment box 3, clock phase display screen 31, clock phase manual adjustment knob 32, heat dissipation channel 33, sound-absorbing sponge 34, strip heat dissipation vent 35, accumulation gap monitoring system 4, pulse signal counting module 41, pulse gap timing module 42, clock phase control module 43, wiring area 5, generator pulse signal input port 51, clock pulse signal output port 52, signal transmission connection line 53, sound insulation material 54, noise collection structure 6, pulse signal protective shell 61, noise collection box 62, strip audio collection slot 63, audio collection hole 64, positioning seat 65, connecting base 66, oscillation noise collection strip 67, the possibility of using other terms cannot be ruled out. The use of these terms is merely for the convenience of describing and explaining the nature of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A high-speed accumulator card residual noise suppression device, comprising a ring pulse generator (1), wherein the ring pulse generator (1) is connected to a crystal oscillator (11), characterized in that, The crystal oscillator (11) is located in an oscillation circuit (14) with an adjustable clock source (12), and the crystal oscillator (11) is connected to a phase-locked loop (13) located in a different subsystem. The oscillation circuit (14) is connected to a noise monitoring mechanism (2). The oscillation circuit (14) is located in a clock phase adjustment box (3) via a circuit mounting plate (15), and the clock phase adjustment box (3) is connected to an accumulation gap monitoring system (4). The accumulation gap monitoring system (4) includes a pulse signal counting module (41) located on a ring pulse generator (1). The pulse signal counting module (41) is connected to a pulse gap timing module (42) located on the clock phase adjustment box (3). The pulse gap timing module (42) is connected to a clock phase control module (43) located on the circuit mounting plate (15). The clock phase control module (43) randomly adjusts the clock pulse signal output time and clock phase of the adjustable clock source (12) according to the number of accumulations of the pulse signal and the gap duration of two adjacent pulse signals.

2. The high-speed accumulator card residual noise suppression device according to claim 1, characterized in that, The clock phase adjustment box (3) is provided with a clock phase display screen (31) at one end. The clock phase display screen (31) is connected to an adjustable clock source (12). A clock phase manual adjustment knob (32) is provided on one side of the clock phase display screen (31). The clock phase adjustment box (3) has heat dissipation channels (33) on both sides. Sound-absorbing sponge (34) is provided in the heat dissipation channels (33). The sound-absorbing sponge (34) is in close contact with the strip-shaped heat dissipation vent (35) set on the inner wall of the clock phase adjustment box (3).

3. The high-speed accumulator card residual noise suppression device according to claim 2, characterized in that, The clock phase adjustment box (3) has a wiring area (5) at one end away from the clock phase display screen (31). The wiring area (5) has a generator pulse signal input port (51). The upper end of the generator pulse signal input port (51) has a clock pulse signal output port (52). The generator pulse signal input port (51) and the clock generator pulse signal input port (51) are connected to the adjustable clock source (12) through a signal transmission connection line (53). Both ends of the signal transmission connection line (53) are provided with sound insulation material (54) on the outer circumference.

4. The high-speed accumulator residual noise suppression device according to claim 3, characterized in that, The noise monitoring mechanism (2) includes a noise level display screen (21) installed on the upper end of the clock phase adjustment box (3), a first noise monitoring module (22) connected to the ring pulse generator (1), a second noise monitoring module (23) installed on the adjustable clock source (12), and a noise collection structure (6) circumferentially provided for the first noise monitoring module (22) and the second noise monitoring module (23), and the first noise monitoring module (22) and the second noise monitoring module (23) are respectively connected to the noise level display screen (21); the noise collection structure (6) includes a pulse signal protection shell (61), and a noise collection box (62) is provided on the inner side of the pulse signal protection shell (61). The first noise monitoring module (22) and the second noise monitoring module (23) are respectively set in the corresponding noise collection box (62). The noise collection box (62) is provided with a number of staggered strip-shaped audio collection slots (63) in the circumference, and a number of audio collection holes (64) are provided at the upper end of the noise collection box (62). The noise collection box (62) is fixedly set in the positioning seat (65) at the bottom of the pulse signal protection shell (61), and the bottom of the pulse signal protection shell (61) is provided with a connecting base (66). The bottom of the first noise monitoring module (22) or the second noise monitoring module (23) is welded to the corresponding ring pulse generator or adjustable clock source (12) through the oscillating noise collection strip (67).

5. A method for suppressing residual noise of a high-speed accumulator card, applicable to the high-speed accumulator card residual noise suppression device according to any one of claims 1-4, characterized in that, This method includes the following steps: S1. The ring pulse generator (1) emits a pulse signal, which is transmitted to the adjustable clock source (12) through the signal transmission connection line (53). The adjustable clock source (12) provides a clock pulse signal through the crystal oscillator (11). S2. The first noise monitoring module (22) detects the pulse signal input to the ring pulse generator (1), and the second noise monitoring module (23) detects the noise of the clock pulse signal output by the adjustable clock source (12). S3, the pulse signal counting module (41) counts the number of pulse signals emitted by the ring pulse generator (1), and the pulse gap counting module counts the time of the gap between two adjacent pulse signals.

6. The method for suppressing residual noise in a high-speed accumulator card according to claim 5, characterized in that, In step S1, the crystal oscillator (11) works in conjunction with the phase-locked loop (13) to provide the required clock pulse signal frequency. Clock pulse signals of different frequencies are provided by phase-locked loops (13) in different subsystems.

7. The method for suppressing residual noise in a high-speed accumulator card according to claim 6, characterized in that, In step S2, the first noise monitoring module (22) is used to detect the original noise, and the second noise monitoring module (23) is used to detect the residual noise.

8. The method for suppressing residual noise in a high-speed accumulator card according to claim 7, characterized in that, In step S3, the changes in the number of pulse signals and the interval duration are synchronized with the clock pulse signal.

9. The method for suppressing residual noise in a high-speed accumulator card according to claim 8, characterized in that, In step S4, the phase of the adjustable clock source (12) can also be manually adjusted by the clock phase manual adjustment knob (32).

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