Buoy multi-path array element signal simulation device

Abstract

The invention belongs to the technical field of aeronautical sonar buoy application, and particularly relates to a buoy multi-path array element signal simulation device which is used for simulating input signals of sonar buoy array elements. The input signal comprises an array type, an array element signal path number, a simulation incident angle, a signal amplitude and a signal-to-noise ratio; and the buoy multi-path array element signal simulation device is configured in a way that an input signal can be accessed to the buoy through the audio connector. The buoy multi-path array element signal simulation device is small in size, flexible in configuration and high in portability, and can meet the signal acquisition and signal processing test requirements of buoy underwater extension sets with different arrays, different channel numbers, different incident angles, different signal amplitudes and different frequencies.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation sonar buoy application, and in particular relates to a buoy multi-channel array element signal simulation device. Background Art

[0002] Airborne sonar buoys are underwater target detection equipment, usually composed of a shell, a surface electronic cabin, a depth-fixing device, an underwater extension, and an underwater detection array. The underwater extension collects the signals captured by the underwater detection array and completes signal processing. In order to fully verify the sampling and signal processing capabilities of the underwater extension, a device is required that can generate multiple types of buoy array element simulation signals to simulate different detection conditions.

[0003] The analog signal source can only generate commonly used signal forms and cannot generate different types of multi-channel array element buoy incident signals, which cannot meet the use requirements. Summary of the invention

[0004] In view of this, the present invention provides a buoy multi-channel array element signal simulation device, which can generate different types of multi-channel array element buoy incident signals to meet usage requirements.

[0005] A buoy multi-path array element signal simulation device is used to simulate the input signal of the sonar buoy array element; the input signal includes the base array type, the number of array element signal paths, the simulated incident angle, the signal amplitude and the signal-to-noise ratio;

[0006] The buoy multi-channel array element signal simulation device is configured so that the input signal can be connected to the buoy through an audio connector.

[0007] Furthermore, the input signal is obtained based on the following formula:

[0008] S i =A*sin(2*pi*f*(t-φ-τ i ))+B*Snoise

[0009] Among them, S i is the i-channel array element signal, A is the amplitude coefficient, f is the signal frequency, τ i is the i-way signal delay, B is the noise coefficient, Snoise is the pre-stored noise signal; the buoy multi-channel array element signal simulation device controls the change of the simulated signal incident angle based on adjusting φ, controls the change of the output signal amplitude based on adjusting A, controls the change of the output signal channel number based on adjusting i, and adjusts the change of the signal-to-noise ratio through the amplitude coefficient A and the noise coefficient B; β is the output signal-to-noise ratio.

[0010] Furthermore, the output signal signal-to-noise ratio is obtained based on the following formula:

[0011]

[0012] Furthermore, the incident angle of the analog signal varies in a range of 0° to 360°, with a resolution of 0.05°.

[0013] Furthermore, the amplitude of the output signal varies in the range of 0V to 5V.

[0014] Furthermore, the number of output signal channels ranges from 1 to 40.

[0015] Furthermore, the signal-to-noise ratio varies in a range of -10 dB to 25 dB, with a variation resolution of 0.1 dB.

[0016] Furthermore, the buoy multi-channel array element signal simulation device is also used to generate required buoy array element signals; the buoy array element signals include horizontal array element signals, vertical array element signals, vector sensor array element signals and volume array element signals; the frequency range of the buoy array element signals is 5Hz to 10000Hz, and the frequency resolution is 0.1z.

[0017] Furthermore, when the buoy multi-channel array element signal simulation device is preset, the data of the noise signal is imported into the NAND flash memory inside the buoy multi-channel array element signal simulation device based on the network port and stored in the form of a file. When generating signals with different signal-to-noise ratios, the noise data is loaded and superimposed with the signal and then output.

[0018] Furthermore, the method for the buoy multi-channel array element signal simulation device to input a simulation signal to the buoy comprises the following steps:

[0019] Step 1: Set the transmission parameters of the buoy multi-channel array element signal simulation device, including the base array type, the number of array element signal paths, the simulated incident angle, the center frequency, the signal amplitude and the signal-to-noise ratio;

[0020] Step 2: Load and calculate the array type, number of array element signal paths, simulated incident angle, center frequency, signal amplitude and signal-to-noise ratio;

[0021] Step 3: Based on the data in step 2, use DDS to generate multiple signals of amplitude, phase, frequency and matrix type;

[0022] Step 4: Read and load pre-stored noise data parameters to generate a noise signal;

[0023] Step 5: Superimposing the multi-channel signals with the noise signals respectively to generate multi-channel analog signals to be transmitted;

[0024] Step six: Output the multi-channel analog signals to the DAC and output them to the buoy through the audio connector after being conditioned by the analog conditioning circuit.

[0025] Beneficial effects of the present invention:

[0026] The buoy multi-channel array element signal simulation device of the present invention has a small size, flexible configuration, and high portability, and can adapt to the signal collection and signal processing test requirements of buoy underwater extensions with different formations, different numbers of channels, different incident angles, different signal amplitudes, and different frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Implement the block diagram for the buoy signal simulation device;

[0029] Figure 2 Generates a block diagram for modulating signals for buoy signal simulation devices;

[0030] Figure 3 Generate a block diagram of multiple signal for the buoy signal simulation device. DETAILED DESCRIPTION

[0031] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0032] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0033] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0036] In one embodiment of the present invention, a buoy multi-channel array element signal simulation device is provided. Figure 1-Figure 3 , used to simulate the input signal of the sonar buoy array element; the input signal includes the array type, the number of array element signal paths, the simulated incident angle, the signal amplitude and the signal-to-noise ratio;

[0037] The buoy multi-channel array element signal simulation device is configured so that the input signal can be connected to the buoy through an audio connector.

[0038] In this embodiment, the array type, the number of array element signal paths, the simulated incident angle, the center frequency, the signal amplitude and the signal-to-noise ratio are set based on the following formula:

[0039] S i =A*sin(2*pi*f*(t-φ-τ i ))+B*Snoise

[0040] Among them, S i is the i-channel array element signal, A is the amplitude coefficient, f is the signal frequency, τ iis the i-way signal delay, B is the noise coefficient, Snoise is the pre-stored noise signal; the buoy multi-channel array element signal simulation device controls the change of the simulated signal incident angle based on adjusting φ, controls the change of the output signal amplitude based on adjusting A, controls the change of the output signal channel number based on adjusting i, and adjusts the change of the signal-to-noise ratio through the amplitude coefficient A and the noise coefficient B; β is the output signal-to-noise ratio.

[0041] In this embodiment, the output signal noise ratio is obtained based on the following formula:

[0042]

[0043] In this embodiment, the incident angle of the analog signal varies in a range of 0° to 360°, with a resolution of 0.05°.

[0044] The amplitude variation range of the output signal is 0V to 5V.

[0045] The output signal channel number ranges from 1 to 40.

[0046] The signal-to-noise ratio varies in the range of -10dB to 25dB, and the variation resolution is 0.1dB.

[0047] In this embodiment, the buoy multi-channel array element signal simulation device is also used to generate required buoy array element signals; the buoy array element signals include horizontal array element signals, vertical array element signals, vector sensor array element signals and volume array element signals; the frequency range of the buoy array element signals is 5Hz to 10000Hz, and the frequency resolution is 0.1Hz.

[0048] In this embodiment, when the buoy multi-channel array element signal simulation device is preset, the data of the noise signal is imported into the NAND flash memory inside the buoy multi-channel array element signal simulation device based on the network port and stored in the form of a file. When generating signals with different signal-to-noise ratios, the noise data is loaded and superimposed with the signal and then output.

[0049] In this embodiment, the method for the buoy multi-channel array element signal simulation device to input a simulation signal to the buoy comprises the following steps:

[0050] Step 1: Set the transmission parameters of the buoy multi-channel array element signal simulation device, including the base array type, the number of array element signal paths, the simulated incident angle, the center frequency, the signal amplitude and the signal-to-noise ratio;

[0051] Step 2: Load and calculate the array type, number of array element signal paths, simulated incident angle, center frequency, signal amplitude and signal-to-noise ratio;

[0052] Step 3: Based on the data in step 2, use DDS to generate multiple signals of amplitude, phase, frequency and matrix type;

[0053] Step 4: Read and load pre-stored noise data parameters to generate a noise signal;

[0054] Step 5: Superimposing the multi-channel signals with the noise signals respectively to generate multi-channel analog signals to be transmitted;

[0055] Step six: Output the multi-channel analog signals to the DAC and output them to the buoy through the audio connector after being conditioned by the analog conditioning circuit.

[0056] The following is combined with Figure 3 Specifically, a buoy multi-channel array element signal simulation device is implemented according to the following steps:

[0057] Step 1: Set the transmission parameters through the touch screen. The array type is horizontal array, the number of array element signal paths is 10, the simulated incident angle is 30°, the signal amplitude is 1.5V, and the signal-to-noise ratio is 10dB.

[0058] Step 2: The software loads and calculates the array type, center frequency, amplitude coefficient, noise coefficient, phase, number of channels, and signal-to-noise ratio.

[0059] S i =A*sin(2*pi*f*(t-τ i )-φ)+B*Snoise

[0060]

[0061] S i is the i-channel array element signal, A is the amplitude coefficient, f is the signal frequency, τ i is the signal delay of channel i, B is the noise coefficient, and Snoise is the pre-stored noise signal. Calculate τ using the horizontal array model i , adjust φ to control the incident angle of the analog signal to 30°, adjust A to control the output signal amplitude to 1.5V, and adjust i to control the number of output signal channels to 10. The signal-to-noise ratio is adjusted to 10dB through the amplitude coefficient A and the noise coefficient B.

[0062] Step 3: Use DDS to generate multiple signals of amplitude, phase, frequency, and matrix type.

[0063] Step 4: Read and load pre-stored noise data and parameters to generate noise signals.

[0064] Step 5: Superimpose the multi-channel signals with the noise signals respectively to generate multi-channel analog signals to be transmitted.

[0065] Step 6: Output the multi-channel analog signals to the DAC and output them to the buoy through the audio connector after being conditioned by the analog conditioning circuit.

[0066] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A buoy multi-channel array element signal simulation device, characterized in that: An input signal for simulating a sonobuoy array element; the input signal includes an array type, a number of array element signal paths, a simulated incident angle, a signal amplitude, and a signal-to-noise ratio; The buoy multi-channel array element signal simulation device is configured so that the input signal can be connected to the buoy through an audio connector.

2. The buoy multi-channel array element signal simulation device according to claim 1, characterized in that: The input signal is derived based on the following formula: S i =A*sin(2*pi*f*(t-φ-τ i ))+B*Snoise Among them, S i is the i-channel array element signal, A is the amplitude coefficient, f is the signal frequency, τ i is the i-way signal delay, B is the noise coefficient, Snoise is the pre-stored noise signal; the buoy multi-channel array element signal simulation device controls the change of the simulated signal incident angle based on adjusting φ, controls the change of the output signal amplitude based on adjusting A, controls the change of the output signal channel number based on adjusting i, and adjusts the change of the signal-to-noise ratio through the amplitude coefficient A and the noise coefficient B; β is the output signal-to-noise ratio.

3. The buoy multi-channel array element signal simulation device according to claim 2, characterized in that: The output signal-to-noise ratio is based on the following formula:

4. The buoy multi-channel array element signal simulation device according to claim 3 is characterized in that: The incident angle of the analog signal varies in the range of 0° to 360°, with a resolution of 0.05°.

5. The buoy multi-channel array element signal simulation device according to claim 4, characterized in that: The amplitude variation range of the output signal is 0V to 5V.

6. The buoy multi-channel array element signal simulation device according to claim 5, characterized in that: The number of output signal channels ranges from 1 to 40.

7. The buoy multi-channel array element signal simulation device according to claim 6, characterized in that: The signal-to-noise ratio varies in the range of -10dB to 25dB, and the variation resolution is 0.1dB.

8. The buoy multi-channel array element signal simulation device according to claim 3, characterized in that: The buoy multi-channel array element signal simulation device is also used to generate the required buoy array element signals; the buoy array element signals include horizontal array element signals, vertical array element signals, vector sensor array element signals and volume array element signals; the frequency range of the buoy array element signals is 5Hz to 10000Hz, and the frequency resolution is 0.1Hz.

9. The buoy multi-channel array element signal simulation device according to claim 8, characterized in that: When the buoy multi-channel array element signal simulation device is preset, the data of the noise signal is imported into the NAND flash memory inside the buoy multi-channel array element signal simulation device based on the network port and stored in the form of a file. When generating signals with different signal-to-noise ratios, the noise data is loaded and superimposed with the signal and then output.

10. The buoy multi-channel array element signal simulation device according to claim 9, characterized in that: The method of the buoy multi-channel array element signal simulation device inputting a simulation signal to the buoy comprises the following steps: Step 1: Set the transmission parameters of the buoy multi-channel array element signal simulation device, including the base array type, the number of array element signal paths, the simulated incident angle, the center frequency, the signal amplitude and the signal-to-noise ratio; Step 2: Load and calculate the array type, number of array element signal paths, simulated incident angle, center frequency, signal amplitude and signal-to-noise ratio; Step 3: Based on the data in step 2, use DDS to generate multiple signals of amplitude, phase, frequency and matrix type; Step 4: Read and load pre-stored noise data parameters to generate a noise signal; Step 5: Superimposing the multi-channel signals with the noise signals respectively to generate multi-channel analog signals to be transmitted; Step six: Output the multi-channel analog signals to the DAC and output them to the buoy through the audio connector after being conditioned by the analog conditioning circuit.

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