RU63550U1 - DEVICE FOR DETECTION AND DETERMINATION OF LOCATION OF SOURCE SOURCE SOURCE - Google Patents

Abstract

The device for detecting and determining the location of the reflected acoustic signal source is designed to detect underwater and surface objects from the acoustic signals reflected from them. The claimed device has a large detection range and allows you to digitally process samples of the reflected acoustic process of long duration, as well as determine the location of the source of the reflected acoustic signal in real time. The device contains a discrete antenna array (DAR) with antenna elements placed randomly in the volume of the antenna device, as well as N electro-acoustic transducers, N information transmission channels, N analog-to-digital converters and N delay lines connected in series, and all line outputs delays are connected to the N inputs of the first module of the correlation shaper (MKF), which is part of the correlation shaper directivity characteristics (KFHN), which is formed sequentially interconnected M modules of the correlation former, with the possibility of discrete processing of samples of the adopted process. Each IFF is connected by a control channel and a matching channel with a matching and buffering control unit, with the possibility of receiving a processed signal at its output for display and analysis of information and subsequent transmission of this signal to the input of the information display and analysis device. Each IFF includes an information buffering unit, the N outputs of which are connected in parallel with the inputs of the voltage combiner and the inputs of N quadrators, and the outputs of the quadrator block are connected with the corresponding inputs of the power combiner. The output of the power adder and the output of the voltage adder through a correlation computer are connected to the input of the integrator. 1 n.a. and 6 z.p. f-ly, 2 ill.

Description

The utility model relates to hydroacoustics, namely, devices for detecting targets using reflection of acoustic waves and can be used to determine the location of underwater and surface objects.

A device is known for determining the direction to the source of acoustic signals, the closest in technical essence of the claimed utility model and selected as a prototype. The device contains a random antenna array, information transmission channels, a directional characteristics shaper, consisting of delay lines and a voltage combiner, as well as an integrator. In the known device, the directivity characteristic generator is equipped with a quadrator unit, the inputs of which are connected to the outputs of the delay lines, a power adder, the inputs of which receive the output values of the quadrator unit, a correlation calculator, the inputs of which are connected to the outputs of the voltage adder and the power adder. (Patent 23107 Russian Federation, IPC ⁷ G01S 3/00. Device for determining the direction to the source of acoustic signals / Dolgikh V.N., Borodin A.E; applicant and patentee V.N. Dolgikh. - No. 20011130612; decl. 16.11. 2001; publ. May 20, 2002, Bull. No. 14.)

The known device determines the direction to the source of acoustic signals, reduces the mathematical expectation of the field of additional maxima and additionally provides a narrowing of the main maximum of the directivity.

However, the known device can be used in detection systems only noisy underwater and surface objects. Implementation

The prototype allows you to determine the direction of the object, but this is not enough to determine the location of the object, since this requires the determination of not only the direction, but also the distance (distance) to the object.

The disadvantages inherent in the prototype were eliminated by the proposed utility model: “A device for detecting and determining the location of a reflected acoustic signal source”, the technical task of which is to create a new device for determining the location of a reflected acoustic signal source by detecting it and determining the direction and distance to an underwater or surface object.

The implementation of the specified technical task of the proposed utility model allows to achieve the following technical result, which is the sum of the obtained technical effects:

- the use of analog-to-digital converters for converting the output signal processes of the electro-acoustic transducers of the antenna array allowed further processing of the received signal in digital form, using modern technology;

- sequentially interconnected modules of the correlation former allow processing samples of the reflected acoustic process of long duration, which in turn increases the ability to detect sources of the reflected acoustic signal over a long distance. The number of modules of the correlation driver is determined by the ratio of the duration of the received sample of the reflected acoustic signal with the time of complete processing of the discrete part of the sample in each of the modules of the correlation driver;

- connection of each module of the correlation driver with a control channel and a matching channel with a matching and control unit for buffering allows to obtain a continuous output

the processed signal to display and analyze information about the fact of detection and location of the source of the reflected acoustic signal in almost real time, as well as reduce the number of modules of the correlation driver necessary for complete processing of the received sample of the reflected acoustic process;

- the information buffering unit in the composition of each module of the correlation generator makes it possible to perform complete processing of a sample of the reflected acoustic process in parallel, which significantly reduces the processing time of the entire sample;

- the antenna array, made in the form of a discrete array, with antenna elements placed randomly in space, allows it to be placed on carriers both stationary and in the form of lowered or discharged hydroacoustic devices, thereby increasing the universality of the device as a whole;

- the use of a discrete antenna array and a correlation driver of the directivity characteristic allows one to determine the direction to the source and the distance to the source of reflected acoustic signals (source location) while reducing the mathematical expectation of the field of additional maxima and ensuring narrowing of the main maximum of the directivity characteristics, increasing the accuracy of determining the target location.

To achieve the specified technical result, the proposed device for detecting and determining the location of the source of the reflected acoustic signal, containing a discrete antenna array in which N electro-acoustic transducers are connected in series with N channels of information transmission and N delay lines, as well as a correlation driver of the directivity, including a voltage combiner , correlation calculator, integrator, block of quadrators and power adder. Block outputs

quadrators are connected to the corresponding inputs of the power adder, and the output of the power adder and the output of the voltage adder are connected to the corresponding inputs of the correlation computer, the output of which is connected to the input of the integrator.

The difference between the proposed device and the prototype is that the discrete antenna array includes N analog-to-digital converters, the inputs of which are connected to the corresponding outputs of the information transmission channels, and the ADC outputs are connected to the corresponding outputs of the delay lines, and all outputs of the delay lines are connected to the N inputs of the first module correlation driver, which is part of the correlation driver, directional characteristics formed by M modules connected in series with each other a shaper, each of which is connected to a control channel and a matching channel with a matching and control unit for buffering, with the possibility of receiving a processed signal at its output for display and analysis of information. Each module of the correlation driver includes an information buffering unit, the N outputs of which are connected in parallel with the inputs of the voltage adder and the inputs of N quadrators.

An additional difference is that all delay lines are made in the form of digital shifting devices. The correlation shaper of the directivity characteristic includes M modules of the correlation shaper connected in series, with the possibility of discrete processing of samples of the received signal of long duration, to increase the range, detecting the source of the reflected signal at a great distance from the detector. Moreover, the number M of modules of the correlation driver is determined by the ratio of the duration of the received sample of the reflected acoustic signal with the time of complete processing of the discrete sample in each of the M modules of the correlation driver.

Such a mutual arrangement of structural elements and their interconnection is necessary in order to be able to process samples of long duration, which as a result increases the possible detection distance of the reflected signal source, i.e. range of the device.

Another additional difference from the prototype is that in each of the M modules of the correlation driver the integrator output in the corresponding matching channel is connected to the corresponding input of the matching and buffering control unit (BSUB), and the input of the information buffering unit (BBI) in the corresponding control channel is connected to the corresponding output BSUB. As a result of such a mutual arrangement of these structural elements in the device, it is possible to obtain the processed signal at the output of the matching unit and control the buffering to display and analyze information and then transmit this signal to the input of the information analysis and display device.

It is the presence in the claimed utility model of distinctive and additional features distinctive from the prototype that allows us to determine not only the direction to the source of the reflected acoustic signal, but also to determine the distance to it (distance), i.e. determine the location of the source of the reflected acoustic signal, increase the detection range of the object and reduce the mathematical expectation of the field of additional maxima, providing processing of the sample of the reflected signal in almost real time and narrowing the main maximum of the directivity.

The essence of the utility model is illustrated by drawings, where in Fig.1 shows "Device for detecting and determining the location of the source of the reflected acoustic signal." Functional diagram; on figa shows the "Module correlation shaper (enlarged)." Functional diagram.

Figure 1 presents a functional diagram of a device for detecting and determining the location of the source of the reflected acoustic signal, including:

1. A discrete antenna array (DAR), made in the form of a discrete antenna array, with antenna elements placed randomly in space - a random antenna array (CAP), consisting of:

1.1 Electro-acoustic transducer (EAP), the number of EAP - N, CAP elements;

1.2 Channel information transfer (CLI), the number of KPI - N;

1.3 Analog-to-digital converter (ADC), the number of ADCs is N;

1.4 delay line (LZ), the number of L3-N;

2. Correlation shaper directivity characteristics KFHN);

2.1 The module of the correlation shaper (MKF), the number of MKF - M;

2.2 Block coordination and management of buffering (BSUB).

In the functional diagram of N, electro-acoustic transducers 1.1.N (Fig. 1) are connected by electric communication lines to the corresponding N-channels for transmitting information 1.2.N (Fig. 1) and to the inputs of the corresponding N analog-to-digital converters 1.3.N (Fig. 1) that digitize the signal. The outputs of all N ADCs by electric communication lines are connected to the corresponding inputs of N delay lines 1.4.N (Fig. 1), which are made in the form of digital shifting devices. All outputs of the N delay lines are connected to the N inputs of the first module of the correlation generator 2.1.1 (FIG. 1), for processing part of the information limited by the memory capacity of the buffering unit 2.1.M.1 (FIG. 1). The rest of the information goes to the corresponding N inputs of the second IFF 2.1.2 (FIG. 1), for processing the next piece of information, which is limited by the memory capacity of the corresponding IFF, the buffering unit. The remaining information goes to the next IFF 2.1.M-1 (figure 1) and so

further, until the end of the information sample or the end of the processing of the first IFF, the part of the information allocated to it and the completion of the discrete processing of the received signal of long duration and increase the range of the device. These are the cause and effect of the serial connection of all M MKF 2.1.1-2.1.M (Fig. 1) as part of the correlation driver of the directivity characteristic 2 (Fig. 1). Each module of the correlation driver 2.1.1-2.1.M (Fig. 1) is connected by a corresponding control channel and a matching channel with the corresponding inputs of the block matching and buffering control 2.2 (Fig. 1), which performs the coordination of output information from all M MFs, transforming it in a continuous stream of processed information received by the device display and analysis of information.

On figa presents a functional diagram of the module correlation shaper (enlarged), containing:

2.1.M. Module of the correlation shaper;

2.1.M.1. Information Buffer Block (BFI);

2.1.M.2. Quadrator, the number of quadrators - N, equal to the number of outputs of the GIFT);

2.1.M.3. Power adder (SM);

2.1.M.4. Voltage combiner (CH);

2.1.M.5. Correlation Calculator (KB);

2.1.M.6. Integrator

For further processing of the converted signal, all the outputs of the delay lines by electrical communication lines are connected to the N inputs of the first module of the correlation driver, namely, the N inputs of the BFI 2.1.M.1 (Fig. 1a), which remembers the first part of the total sample of the received signal, limited by the operational block memory. To process the rest of the discrete part of the sample, the BFI 2.1.M.1 (figa) is connected by serial electric lines to the N inputs of the following MF 2.1.M (figa). Other N outputs BFI 2.1.M.1 (figa)

electric communication lines are connected in parallel with the inputs of the voltage adder 2.1.M.4 (figa) and the corresponding N inputs of the squares 2.1.M.2.N (figa), the outputs of which are connected to the corresponding inputs of the power adder 2.1.M.3 (figa). In each of the M modules of the correlation driver, the input of the BFI 2.1.M.1 information buffering unit (Fig. 1a) is connected to the corresponding output of the matching and buffering control unit 2.2 (Fig. 1), forming the corresponding control channel. The inputs of the correlation calculator 2.1.M.5 (figa) are connected in parallel with the corresponding outputs of the power adder 2.1.M.3 (figa) and the voltage adder 2.1.M.4 (figa), and the output of the correlation calculator is connected to the input of the integrator 2.1.M.6 (figa). The output of the integrator 2.1.M.6 (figa) is connected to the corresponding input of the block matching and control buffering in the corresponding channel matching.

The device operates as follows.

Electro-acoustic transducers 1.1.N (Fig. 1) are installed in the volume of the fairing of the acoustic carrier antenna or in the volume of the omitted antenna structure in a known manner, as is accepted in science and technology prior to the priority date. The remaining blocks and modules of the device are installed directly on board the media. EAA 1.1.N (Fig. 1), incoming DAR 1 (Fig. 1), receive acoustic signals reflected from the source (target) and through the corresponding information transmission channels 1.2.N (Fig. 1), which perform signal pre-amplification and filtering transmit them to the inputs of the corresponding analog-to-digital converters 1.3.N (Fig. 1), in which the signal is digitized. From the outputs of the ADC 1.3.N (Fig. 1), the digitized signals are fed to the corresponding inputs of the delay lines 1.4.N (Fig. 1), in which the values of the time shifts are set to configure the device for the required spatial direction. After passing the delay line, the received signals are fed to the inputs of the first module of the correlation driver 2.1.1 (figure 1). At the IFF

discrete processing of a part of information occurs, limited by the memory capacity of the information buffering unit 2.1.M.1 (figa). The rest of the information goes to the corresponding inputs of the next IF 2.1.M (Fig. 1), where the next part of the information is processed, limited by the memory capacity of the next buffering unit, and the rest of the information goes to the next IF, and so on, until the end of the information sample or the end of the processing by the first IFF allocated to him a discrete piece of information. The calculated and averaged instantaneous value of the spatial correlation coefficient of the reflected acoustic signal coming from a given direction comes from the output of the modules of the correlation formers 2.1.1-2.1.M (Fig. 1) to the corresponding inputs of the block matching and control buffering 2.2 (Fig. 1). In BSUB 2.2, figure 1), the output information from the outputs of all the IFs 2.1.1-2.1.M (figure 1) is matched and converted into a continuous stream of processed information received by the information display and analysis device. From the corresponding outputs of the matching unit and buffering control, control signals are supplied to the corresponding inputs of the IF 2.1.1-2.1.M (figure 1), to control the operation of the IF, distribution of incoming information between the IFF to reduce its processing time.

Thus, the claimed utility model "Device for detecting and determining the location of a reflected acoustic signal source" is a new device for determining the location of a reflected acoustic signal source, detecting and determining the direction and distance to an underwater or surface object. The claimed device has the following advantages:

- performing processing of the received signal in digital form, using modern technology;

- processing samples of the reflected acoustic signal of long duration, which in turn increases the detection range of the sources of the reflected acoustic signal;

- analysis of information on the fact of the presence and location of the source of the reflected acoustic signal in almost real time;

- the ability to perform complete processing of the sample of the reflected acoustic signal in parallel, which significantly reduces the processing time of the entire sample;

- the possibility of placing a discrete antenna array on carriers both stationary and in the form of lowered or discharged sonar devices in various volumes and configurations of acoustic antennas.

The claimed device is industrially applicable, since its implementation uses widely used components and products of the industry, such as acoustic signal receivers, analog amplifiers and filters, analog-to-digital converters, digital random access memory devices, digital signal processing processors.

Claims (6)

1. A device for detecting and determining the location of a reflected acoustic signal source, comprising a discrete antenna array with N electroacoustic transducers, N information transmission channels and N delay lines connected in series, as well as a directivity characteristic correlation driver, including a voltage combiner, a correlation computer, an integrator, and a quad block and a power adder, wherein the outputs of the quadrator block are connected to the corresponding inputs of the power adder, and in the output of the power adder and the output of the voltage adder are connected to the corresponding inputs of the correlation computer, the output of which is connected to the integrator input, characterized in that the discrete antenna array includes N analog-to-digital converters, the inputs of which are connected to the corresponding outputs of the information transmission channels, and the outputs to the corresponding inputs of delay lines, and all outputs of delay lines are connected to N inputs of the first module of the correlation driver, which is part of the correlation form of the pattern of the directivity characteristics formed by M modules of the correlation driver sequentially interconnected, each of which is connected by a control channel and a matching channel with a matching and control unit for buffering, with the possibility of receiving a processed signal at its output for display and analysis of information, each module of the correlation driver an information buffering unit, the N outputs of which are parallel connected to the inputs of the voltage combiner and the inputs N square horov. 2. The device according to claim 1, characterized in that all N delay lines are made in the form of digital shifting devices. 3. The device according to claim 1, characterized in that the correlation driver of the directivity characteristic includes sequentially connected M modules of the correlation driver, with the possibility of discrete processing of samples of a received signal of long duration to increase the range. 4. The device according to claim 1, characterized in that in each of the M modules of the correlation driver, the integrator output, in the corresponding matching channel, is connected to the corresponding input of the matching and buffering control unit. 5 The device according to claim 1, characterized in that in each of the M modules of the correlation driver, the input of the information buffering unit, in the corresponding control channel, is connected to the corresponding output of the matching and control buffering unit. 6. The device according to claim 1, characterized in that the possibility of receiving at the output of the matching unit and buffering the processed signal for display and analysis of information is used for subsequent transmission of this signal to the input of the information display and analysis device. 7. The device according to claims 1 and 3, characterized in that the number M of modules of the correlation driver is determined by the ratio of the duration of the received sample of the reflected acoustic signal with the time of complete processing of the discrete sample in each of the M modules of the correlation driver.