Active noise control device and control method for reactor chamber

Abstract

The invention discloses an active noise control method for a reactor chamber, which uses a reference signal sensor array, a secondary sound source array and an error signal sensor, and is characterized in that a noise propagation channel with a variable diameter is erected on an outer window of the reactor chamber to shrink the noise propagation area; erecting a reference signal sensor array on an outer window, and collecting a noise cloud picture; a secondary sound source array is erected, signals are sent out through a controller, and a secondary sound source sends out sound waves with the same amplitude and the opposite phase as reference signals for noise reduction; an error signal sensor is erected on the outermost side, and residual noise obtained after noise reduction is collected and fed back to the controller; the number of the reference signal sensor arrays and the number of the secondary sound source arrays are not limited, and a multi-order array can be arranged according to the actual situation on site; the positions of the reference signal sensor array and the secondary sound source array are not limited, the back is provided with a roller skating module, the position of the module is adjusted according to a noise cloud picture output control signal, and the noise reduction effect is improved.

Description

Technical Field

[0001] The present invention belongs to the field of active noise reduction in transformer substations, and more specifically, the present invention relates to an active noise control device and a control method for a reactor room. Background Art

[0002] In recent years, with the continuous economic growth and the accelerated process of industrialization and urbanization, the demand for electricity has increased significantly. As a key link in power transmission and distribution, the demand for substations has also increased. Some newly built substations are close to residential areas, resulting in an increase in sensitive points in the surrounding environment. The impact of noise generated by substations during operation on the surrounding environment and residents' lives has become increasingly concerning, and related complaints about excessive noise have become increasingly prominent.

[0003] The noise generated by power reactors is mainly due to the magnetostriction of silicon steel sheets during the excitation process of the core, which causes the core to vibrate. The frequency of these noises is mainly concentrated in the low-frequency range of 100Hz and its multiples. Long-term exposure to noise may cause health problems and psychological pressure to people, causing people to pay attention to noise pollution and begin to formulate noise control measures.

[0004] At present, in order to solve the noise problem of urban substations, there are many measures, including electromagnetic noise control, fan mechanical noise control, wall sound absorption and sound insulation barriers, the use of soundproof covers, and fully enclosed or semi-enclosed transformer noise management. Traditional noise control methods: Auxiliary noise reduction technologies such as adding enclosures and barriers on the outside will occupy the limited space in the substation and reduce the defects of ventilation, fan heating, and natural lighting of the internal equipment of the substation. As one of the main equipment of the substation, the reactor has important functions such as current limiting, voltage regulation, and harmonic suppression. However, due to the electromagnetic vibration and magnetostrictive effect generated by the reactor during operation, it is easy to become one of the main sources of noise in the substation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an active noise control device and a control method for a reactor chamber with a noise propagation channel having a variable diameter and shrinking the noise propagation area.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An active noise control method for a reactor room uses a reference signal sensor array, a secondary sound source array and an error signal sensor, and sets up a noise propagation channel with a variable diameter at the outer window of the reactor room to shrink the noise propagation area; sets up a reference signal sensor array at the outer window to collect a noise cloud map; sets up a secondary sound source array, sends a signal through a controller, and makes the secondary sound source send out a sound wave with the same amplitude and opposite phase as the reference signal to reduce noise; sets up an error signal sensor at the outermost side to collect residual noise after noise reduction, feeds back to the controller, readjusts the counter noise emitted by the secondary sound source array, performs continuous optimization, and finally reduces the noise to a minimum.

[0008] The present invention discloses a method for active noise control of a reactor chamber, comprising the following steps:

[0009] S1: The reference signal sensor array collects data M on the spatial variation and characteristics of noise;

[0010] S2: Generate a noise pressure cloud map using the collected data M:

[0011] S3: Based on the noise sound pressure cloud map, the controller calculates the initial anti-noise signal Y(n) that needs to be emitted, and transmits the signal to each speaker in the secondary sound source array (b1-b4) (each speaker is responsible for emitting a specific anti-noise, which is opposite in phase to the original noise to achieve the effect of noise reduction);

[0012] S4: Error signal sensor (k1), which monitors the changes in the noise environment in real time, detects the effect of anti-noise, and feeds back the monitored data to the controller; the controller readjusts the anti-noise emitted by the secondary sound source array and adjusts the output of the secondary sound source array.

[0013] The invention discloses an active noise control device for a reactor room, comprising an upper bracket, a lower bracket and a noise reduction part; wherein one end of the upper bracket and the lower bracket are respectively fixedly arranged on the walls on both sides of a window, one end of the noise reduction part is connected to the wall, and the other end of the noise reduction part is fixed by the upper bracket and the lower bracket; the noise reduction part comprises a reference signal sensor array, a secondary sound source array and an error signal sensor (k1), a primary noise transmission channel is between the reference signal sensor array and the secondary sound source array, and a residual noise transmission channel is between the secondary sound source array and the error signal sensor (k1).

[0014] The invention discloses an active noise control device for a reactor room. The reference signal sensor array comprises a rectangular frame D1, two parallel slide rails m1 and m2 are arranged in the rectangular frame D1, and reference signal sensors a1-a4. The rectangular frame D1 is fixedly connected to an outer window, and the reference signal sensor array is arranged in a 2×2 manner; a1-a4 can slide left and right on m1 and m2, and m1 and m2 can slide up and down in D1.

[0015] The invention discloses an active noise control device for a reactor room. The secondary sound source array comprises a rectangular frame D2, two parallel slide rails n1 and n2 are arranged in the rectangular frame D2, and loudspeakers b1-b4 are connected with the rectangular frame D1. The secondary sound source array is arranged in a 2×2 manner; b1-b4 can slide left and right on n1 and n2, and n1 and n2 can slide up and down in D2.

[0016] The invention discloses an active noise control device for a reactor chamber. A rectangular frame D3 is arranged outside the error signal sensor (k1), and the rectangular frame D3 is connected to the rectangular frame D2.

[0017] The invention discloses an active noise control device for a reactor chamber, wherein a spherical soundproof cover is arranged outside the reference signal sensors a1-a4.

[0018] The invention discloses an active noise control device for a reactor chamber. A rotating ball head is provided at the bottom of the loudspeakers b1-b4, and the rotating ball head and n1 and n2 can slide relative to each other.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Install and use it outside the reactor window, which does not occupy indoor space and does not affect indoor and outdoor ventilation;

[0021] 2. There is no limit on the number of reference signal sensor arrays and secondary sound source arrays, and multiple-order arrays can be deployed according to the actual situation on site;

[0022] 3. The positions of the reference signal sensor array and the secondary sound source array are not restricted. A roller skating module is provided on the back. The module position is adjusted according to the control signal output by the noise cloud map to improve the noise reduction effect.

[0023] 4. A spherical device is provided on the back of the reference signal sensor to reduce the influence of noise from the back;

[0024] 5. The back of the secondary sound source speaker is equipped with a rotatable ball head, which does not fix the sound transmission direction of the speaker and improves the noise reduction effect;

[0025] 6. By changing the diameter of the sound transmission channel, the influence of sound transmission in a large space is reduced and the noise reduction effect is improved;

[0026] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following is a brief description of the contents and symbols in the drawings of this specification:

[0028] Figure 1 It is a schematic diagram of the channel of the present invention;

[0029] Figure 2 is a schematic diagram of the present invention;

[0030] Figure 3 is a schematic diagram of a reference signal sensor array of the present invention;

[0031] Figure 4 is a schematic diagram of a secondary sound source array of the present invention;

[0032] Figure 5 is a schematic diagram of an error signal sensor of the present invention;

[0033] Figure 6 A schematic diagram of a sliding module used in the present invention;

[0034] Figure 7 It is an enlarged schematic diagram of point A of the present invention;

[0035] Figure 8 It is an enlarged schematic diagram of point B of the present invention;

[0036] Fig. 9 It is a schematic diagram of the noise reduction process of the present invention;

[0037] Marked in the figure are: 1. Reference signal sensor array; 2. Secondary sound source array; 3. Error signal sensor; 4. Residual noise transmission channel; 5. Primary noise transmission channel; 6. Signal transmission line; 7. Controller; 8. Noise channel; 9. Upper bracket; 10. Lower bracket; 11. Spherical sound insulation cover. DETAILED DESCRIPTION

[0038] The following, with reference to the accompanying drawings, provides a further detailed description of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operating methods, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0039] like Figure 1 and Figure 2 An active noise control device for a reactor room is shown, comprising an upper bracket 9, a lower bracket 10 and a noise reduction part; wherein one end of the upper bracket 9 and the lower bracket 10 are respectively fixed to the walls on both sides of the window, one end of the noise reduction part is connected to the wall, and the other end of the noise reduction part is fixed by the upper bracket 9 and the lower bracket 10; the noise reduction part comprises a reference signal sensor array 1, a secondary sound source array 2 and an error signal sensor 3 (k1), a primary noise transmission channel 5 is between the reference signal sensor array 1 and the secondary sound source array 2, and a residual noise transmission channel 4 is between the secondary sound source array 2 and the error signal sensor 3 (k1).

[0040] like Figure 3 The reference signal sensor array 1 shown includes a rectangular frame D1, two parallel slide rails m1 and m2 are arranged in the rectangular frame D1, and reference signal sensors a1-a4. The rectangular frame D1 is fixedly connected to the outer window, and the reference signal sensor array 1 is arranged in a 2×2 manner; a1-a4 can slide left and right on m1 and m2, and m1 and m2 can slide up and down in D1.

[0041] like Figure 4 The secondary sound source array 2 shown includes a rectangular frame D2, two parallel slide rails n1 and n2 are arranged in the rectangular frame D2, and speakers b1-b4. The rectangular frames D1 and D2 are connected, and the secondary sound source array 2 is arranged in a 2×2 manner; b1-b4 can slide left and right on n1 and n2, and n1 and n2 can slide up and down in D2.

[0042] It should be noted that the arrangement of the reference signal sensor array 1 and the secondary sound source array 2 is a 2×2 arrangement in the present application, but depending on the working environment and the nature of the work, it may also be a 3×3, 2×3, 3×2 or other arrangements.

[0043] like Figure 5 The error signal sensor 3 ( k1 ) shown is provided with a rectangular frame D3 on the outside, and the rectangular frame D3 is connected to the rectangular frame D2 .

[0044] like Figure 6 The slide rails (n1, n2, m1 and m2), reference signal sensors (a1-a4) and speakers (b1-b4) shown are slidable on the slide rails.

[0045] like Figure 7 The bottom of the loudspeakers b1-b4 is provided with a rotating ball head, and the rotating ball head and n1 and n2 can slide relative to each other.

[0046] like Figure 8 The reference signal sensors a1 - a4 shown are provided with a spherical soundproof cover 11 on the outside.

[0047] S1: Reference signal sensor array 1 collects data M of spatial variation and characteristics of noise;

[0048] S2: Generate a noise pressure cloud map using the collected data M:

[0049] S3: Based on the noise sound pressure cloud map, the controller 7 calculates the initial anti-noise signal Y(n) to be emitted, and transmits the signal to each loudspeaker in the secondary sound source array 2 (b1-b4) (each loudspeaker is responsible for emitting a specific anti-noise, which is opposite in phase to the original noise to achieve the effect of noise reduction);

[0050] S4: Error signal sensor 3 (k1), monitors the changes of noise environment in real time, detects the effect of anti-noise, and feeds back the monitored data to controller 7; controller 7 readjusts the anti-noise emitted by secondary sound source array 2 and adjusts the output of secondary sound source array 2. Specific embodiments

[0052] like Fig. 9 As shown:

[0053] The reference signal sensor array 1 is set up at the outdoor window of the reactor to collect data M. The location and number of sensors will be selected based on the site conditions and the distribution of noise sources to ensure that the spatial changes and characteristics of noise can be fully captured. The noise sound pressure cloud map is generated through the collected data M to intuitively display the distribution and intensity of noise in space. The sound pressure cloud map not only helps to understand the impact range of the noise source, but also provides a scientific basis and reference for subsequent noise control and reduction measures.

[0054] On the outside of the window, four pieces of trapezoidal laminated glass are used to form a primary noise transmission channel 5, one side of the channel is connected to the window frame, and the other side is an opening. A secondary sound source array 2 is set up at the opening. After obtaining the initial noise cloud map, the initial anti-noise signal Y(n) to be emitted is calculated by the algorithm, and these signals are transmitted to each speaker in the secondary sound source array 2. Each speaker is responsible for emitting a specific anti-noise, which is opposite to the phase of the original noise, so as to achieve the effect of noise reduction. On the outside of the secondary sound source array 2, four pieces of rectangular laminated glass are used to form a residual noise transmission channel 4, one side of the channel is connected to the primary noise transmission channel 5, and the other side is set up with an error signal sensor 3 (k1) for monitoring the residual noise after noise reduction. The function of the error signal sensor (k1) is to monitor the changes in the noise environment in real time, detect the effect of anti-noise, and feed back the monitored data to the controller 7. Through this feedback, the controller 7 can dynamically adjust the output of the secondary sound source array 2 to continuously optimize the noise suppression effect and ensure that the best noise control effect can be achieved under different environmental conditions.

[0055] After the secondary sound source array 2 emits the initial counter-noise, these sound waves meet the original noise emitted by the reactor in space and cancel each other out, aiming to reduce the overall noise level. The error signal sensor 3 (k1) located behind the speaker is responsible for collecting the residual noise signal, that is, the noise component that is not completely canceled out after the counter-noise and the original noise are canceled out. The error signal sensor 3 (k1) transmits these signals to the controller 7, which performs real-time analysis and processing based on the received residual noise signal. By comparing the difference between the actual noise and the expected result, the controller 7 adjusts the control algorithm and outputs a new control signal to the secondary sound source array 2. The speaker of the secondary sound source array 2 emits the adjusted counter-noise according to the new control signal, thereby further optimizing the noise reduction effect. After the reference signal sensor array 1 obtains the primary noise signal, the noise information can be exchanged between different sensors and processed uniformly by the controller 7. When the noise at a certain sensor is large, the adjacent sensors will move toward the sensor to reduce the noise reduction pressure at that point.

[0056] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for active noise control in a reactor chamber, using a reference signal sensor array, a secondary sound source array and an error signal sensor, characterized in that: A noise propagation channel with a variable diameter is set up on the outer window of the reactor to reduce the noise propagation area; a reference signal sensor array is set up on the outer window to collect noise cloud images; A secondary sound source array is set up, and a signal is sent through the controller to make the secondary sound source emit a sound wave with the same amplitude and opposite phase as the reference signal to reduce noise. An error signal sensor is set up on the outermost side to collect the residual noise after noise reduction and feed it back to the controller to readjust the counter-noise emitted by the secondary sound source array, perform continuous optimization, and finally reduce the noise to a minimum.

2. A method for active noise control in a reactor chamber according to claim 1, characterized in that: The following steps are involved: S1: The reference signal sensor array collects data M on the spatial variation and characteristics of noise; S2: Generate a noise pressure cloud map using the collected data M: S3: Based on the noise sound pressure cloud map, the controller calculates the initial anti-noise signal Y(n) that needs to be emitted, and transmits the signal to each speaker in the secondary sound source array (b1-b4) (each speaker is responsible for emitting a specific anti-noise with the same amplitude and opposite phase as the original noise to achieve the effect of noise reduction); S4: Error signal sensor (k1), which monitors the changes in the noise environment in real time, detects the effect of noise reduction, and feeds back the monitored data to the controller; the controller readjusts the counter-noise emitted by the secondary sound source array and adjusts the output of the secondary sound source array.

3. An active noise control device for a reactor chamber according to any one of claims 1 to 2, characterized in that: The invention comprises an upper bracket, a lower bracket and a noise reduction part; wherein one end of the upper bracket and the lower bracket are respectively fixed to the walls on both sides of the window, one end of the noise reduction part is connected to the wall, and the other end of the noise reduction part is fixed by the upper bracket and the lower bracket; the noise reduction part comprises a reference signal sensor array, a secondary sound source array and an error signal sensor (k1), a primary noise transmission channel is between the reference signal sensor array and the secondary sound source array, and a residual noise transmission channel is between the secondary sound source array and the error signal sensor (k1).

4. The active noise control device for a reactor chamber according to claim 3, characterized in that: The reference signal sensor array includes a rectangular frame D1, two parallel slide rails m1 and m2 are arranged in the rectangular frame D1, and reference signal sensors a1-a4. The rectangular frame D1 is fixedly connected to the outer window, and the reference signal sensor array is arranged in a 2×2 manner; a1-a4 can slide left and right on m1 and m2, and m1 and m2 can slide up and down in D1.

5. The active noise control device for a reactor chamber according to claim 3, characterized in that: The secondary sound source array includes a rectangular frame D2, two parallel slide rails n1 and n2 are arranged in the rectangular frame D2, and speakers b1-b4. The rectangular frames D1 and D2 are connected, and the secondary sound source array is arranged in a 2×2 manner; b1-b4 can slide left and right on n1 and n2, and n1 and n2 can slide up and down in D2.

6. The active noise control device for a reactor chamber according to claim 3, characterized in that: A rectangular frame D3 is provided outside the error signal sensor (k1), and the rectangular frame D3 is connected to the rectangular frame D2.

7. The active noise control device for a reactor chamber according to claim 4, characterized in that: A spherical soundproof cover is provided on the outside of the reference signal sensors a1-a4.

8. The active noise control device for a reactor chamber according to claim 5, characterized in that: The bottom of the speakers b1-b4 is provided with a rotating ball head, and the rotating ball head and n1 and n2 can slide relative to each other.

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