KR102165726B1 - Apparatus and method for detecting underwater target - Google Patents

Abstract

According to an embodiment of the present invention, an underwater target detection method comprises the processes of: generating a command for controlling the operation of a sonobuoy; modulating the command into a frequency-shift keying (FSK) digital signal; and transmitting the modulated signal to the sonobuoy in an ultra high frequency (UHF) band. The present invention may control the real-time operation of the sonobuoy.

Description

Underwater target detection apparatus and method TECHNICAL FIELD [APPARATUS AND METHOD FOR DETECTING UNDERWATER TARGET}

The present invention relates to an underwater target detection apparatus and method.

In general, in order to detect a submarine such as an underwater target, an acoustic signal is mainly used instead of light or electromagnetic waves, which is less useful because the transmission distance is very short underwater. A method of detecting a target located underwater using the acoustic signal can be largely divided into a passive acoustic detection mode and an active acoustic detection mode. In addition, various technologies such as Sonobuoy, surface and submarine detection sonar (SONAR), TASS (Towed Array Sonar System), HMS (Hull Mounted Sonar), etc.), and port monitoring systems are used to detect submarines.

The sonobuoy is a sensor that combines a sonar and a buoy, and has a short operating time of several hours and cannot control real-time operation.

There is a problem in that efficient underwater detection is difficult because the sonobui cannot be controlled in real time.

The present invention provides an apparatus and method for controlling real-time operation of a sonobui.

The present invention provides an apparatus and method for improving underwater detection efficiency.

A method according to an embodiment of the present invention is a method for detecting an underwater target, the method comprising: generating a command for controlling operation of a sonobui; Modulating the command into an FSK (Frequency-Shift Keying) digital signal; And transmitting the modulated signal to the sonobuoy in a UHF (Ultra High Frequency) frequency band.

A method according to another embodiment of the present invention is a method for detecting an underwater target, the method comprising: generating a command for controlling operation of a sonobui; Modulating the command into an FSK (Frequency-Shift Keying) digital signal; And transmitting the modulated signal to the sonobuoy in a UHF (Ultra High Frequency) frequency band, and the modulated signal is converted into a UART (Universal Asynchronous Receiver/Transmitter) format.

An apparatus according to an embodiment of the present invention is an underwater target detection apparatus, comprising: a control unit for generating a command for controlling operation of a sonobui; A modulator for modulating the command into a frequency-shift keying (FSK) digital signal; And a transmission unit for transmitting the modulated signal to the sonobuoy in a UHF (Ultra High Frequency) frequency band.

An apparatus according to another embodiment of the present invention is an underwater target detection apparatus, comprising: a control unit for generating a command for controlling operation of a sonobui; A modulator for modulating the command into a frequency-shift keying (FSK) digital signal; And a transmission unit for transmitting the modulated signal to the sonobuoy in a UHF (Ultra High Frequency) frequency band, wherein the modulated signal is converted into a UART (Universal Asynchronous Receiver/Transmitter) format.

The present invention can control the real-time operation of the sonobui.

The present invention can improve the underwater detection efficiency of the sonobui.

The present invention can accurately detect the sonobuoy.

1 is a block diagram of an underwater target detection apparatus according to an embodiment of the present invention;
2 is an exemplary diagram for converting a CFS command into an FSK waveform in an underwater target detection apparatus according to an embodiment of the present invention;
3 is a detailed block diagram of a CPU of an underwater target detection apparatus according to an embodiment of the present invention;
4 is a flowchart illustrating an operation of an initialization processing unit in a CPU of the underwater target detection apparatus according to an embodiment of the present invention;
5 is a flowchart illustrating an operation of a command receiving processing unit in a CPU of the underwater target detection apparatus according to an embodiment of the present invention;
6 is a flowchart illustrating an operation of a CFS FSK processing unit in a CPU of the underwater target detection apparatus according to an embodiment of the present invention; And
7 is a flowchart illustrating a timer interrupt operation in an underwater target detection apparatus according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the technology described in the present invention to a specific embodiment, it should be understood to include various modifications, equivalents, and/or alternatives of the embodiments of the present invention. . In connection with the description of the drawings, similar reference numerals may be used for similar elements.

In the present invention, expressions such as "have", "may have", "include", or "may include" are the presence of corresponding features (eg, elements such as numbers, functions, actions, or parts). And does not exclude the presence of additional features.

In the present invention, expressions such as "A or B", "at least one of A or/and B", or "one or more of A or/and B" may include all possible combinations of items listed together. . For example, “A or B”, “at least one of A and B”, or “at least one of A or B” includes (1) at least one A, (2) at least one B, Or (3) it may refer to all cases including both at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" used in the present invention may modify various elements regardless of their order and/or importance, and one element may be converted to another. It is used to distinguish it from the component, but does not limit the component. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, without departing from the scope of the rights described in the present invention, a first component may be referred to as a second component, and similarly, a second component may be renamed to a first component.

Some component (eg, a first component) is "(functionally or communicatively) coupled with/to)" to another component (eg, a second component) or " When referred to as "connected to", it should be understood that any of the above-described components may be directly connected to the other components described above, or may be connected through other components (eg, a third component). On the other hand, when a component (eg, a first component) is referred to as being “directly connected” or “directly connected” to another component (eg, a second component), a component different from a component It may be understood that no other component (eg, a third component) exists between the elements.

The expression "configured to (configured to)" used in the present invention is, for example, "suitable for", "having the capacity to" depending on the situation. It can be used interchangeably with ", "designed to", "adapted to", "made to", or "capable of". The term "configured to (or set)" may not necessarily mean only "specifically designed to" in hardware. Instead, in some situations, the expression "a device configured to" may mean that the device "can" along with other devices or parts. For example, the phrase “a processor configured (or configured) to perform A, B, and C” means a dedicated processor (eg, an embedded processor) for performing the operation, or by executing one or more software programs stored in a memory device. , May mean a generic-purpose processor (eg, a CPU or an application processor (AP)) capable of performing corresponding operations.

The terms used in the present invention are only used to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the technical field described in the present invention. Among the terms used in the present invention, terms defined in a general dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related technology, and unless explicitly defined in the present invention, an ideal or excessively formal meaning Is not interpreted as. In some cases, even terms defined in the present invention cannot be interpreted to exclude embodiments of the present invention.

The underwater target detection device according to the present invention is mounted on a ship or aircraft, and the sonobui is dropped into a target sea area to detect an underwater target, detects a signal under the control of an underwater target detection device, and transmits the detected signal to the underwater target detection device. do. Then, the underwater target detection device detects the underwater target by analyzing the signal received from the sonobui.

In order to control the operation of the sonobui, the underwater target detection apparatus according to an embodiment of the present invention modulates a frequency-shift keying (FSK) command and outputs it on a UHF (Ultra High Frequency) carrier signal. .

In an embodiment of the present invention, it is necessary to change the communication channel, operation depth, and operation time of the sonobui in the detection of an underwater target using the sonobui, and this can control the operation of the sonobuy by transmitting a control command through UHF communication. That is, the underwater target detection apparatus according to an embodiment of the present invention may control the operation of the sonobuoy by transmitting an operation control command to change a communication channel, an operation depth, and an operation time of the sonobui.

The operation control command further includes an operating life, a sensor type, a detection method (passive or active, etc.), a delivery altitude, and a location tracking.

The data in the control command, operation control command, CFS command, and CFS command format described in the present specification have the same meaning and will be used interchangeably.

1 is a block diagram of an underwater target detection apparatus according to an embodiment of the present invention.

The underwater target detection apparatus according to an embodiment of the present invention includes a USB connector 102, a USB signal connector 110, a CPU 120, a buffer and level conversion unit 130, a DC power supply 104, and a power supply unit ( 140), a UHF signal generator 150, an amplitude modulation (AM) modulator 160, an RF amplifier 170, a switch 180, an SMA connector 190, a UHF antenna 195, and the like.

DC 5V power input through the USB connector 102 or DC (Direct Current) power supply 104 is input to the power supply unit 140 through the switch 180, and when the switch 180 is "ON", a red LED (Light Emitting Diode) 106 is turned on.

The USB signal connector 110 receives a signal input from the computer through the USB connector 102, converts the signal into an internal CPU input signal, and outputs it to the CPU 120.

The CPU 120 generates a CFS signal including serial communication and an instruction to modulate the UHF signal. In addition, the CPU 120 converts the signal input from the USB signal connection unit 110 into a CFS signal format, then generates an FSK-modulated output signal for each digital signal, and sends the signal to the buffer and signal level conversion unit 130. Print.

The buffer and signal level conversion unit 130 converts the signal input from the CPU 120 to match the TTL (Transistor-Transistor Logic) signal level and outputs the converted signal to the AM modulator 160.

The UHF signal generator 150 generates a carrier frequency. That is, the UHF signal generator 150 generates and amplifies the UHF frequency, and then outputs it to the AM modulator 160.

The AM modulator 160 modulates the CPU output signal waveform (a signal input from the buffer and signal level conversion unit 130) to 291.4 MHz, and then through the RF amplification unit 170 and the SMA connector 190 Output through the UHF antenna 195. The signal input to the RF amplification unit 170 refers to a signal modulated into a UHF signal.

An underwater target detection apparatus according to an embodiment of the present invention includes a control unit for generating a command for controlling the operation of the sonobui; A modulator for modulating the command into a frequency-shift keying (FSK) digital signal; And a transmission unit for transmitting the modulated signal in an ultra high frequency (UHF) frequency band.

The command includes a start bit, a data bit, a parity bit, and a stop bit.

When the digital signal is 1 bit, the modulator generates a 1.2 kHz square wave using a timer, and when the digital signal is 0 bit, a 2.2 kHz square wave is generated using the timer.

An underwater target detection apparatus according to another embodiment of the present invention includes a control unit for generating a command for controlling operation of a sonobui; A modulator for modulating the command into a frequency-shift keying (FSK) digital signal; And a transmitter for transmitting the modulated signal in an ultra high frequency (UHF) frequency band, and the modulated signal is converted into a format of a universal asynchronous receiver/transmitter (UART) format.

The command includes a start bit, a data bit, a parity bit, and a stop bit.

When the digital signal is 1 bit, the modulator generates a 1.2 kHz square wave using a timer, and when the digital signal is 0 bit, a 2.2 kHz square wave is generated using the timer.

2 is an exemplary diagram for converting a CFS command into an FSK waveform in an underwater target detection apparatus according to an embodiment of the present invention.

The underwater target detection apparatus according to an embodiment of the present invention analyzes the CFS command 201 transmitted through a USB port, generates a signal so that it can be modulated into a UHF signal, and transmits it. In addition, the underwater target detection apparatus according to an embodiment of the present invention interprets the transmitted 0 and 1 signals, generates 1.2 kHz and 2.2 kHz signals in the form of UART (Universal Asynchronous Receiver/Transmitter) format and outputs them. do. That is, the underwater target detection apparatus according to an embodiment of the present invention generates a 1.2 kHz square wave using a timer when the modulated digital signal is 1 bit, and 2.2 kHz using the timer when the digital signal is 0 bit. It generates a square wave.

When a 12 byte command set is transmitted and received through the USB port, the CPU 120 checks whether the 12 byte command format is correct and, if correct, extracts each 12 byte of data.

The CPU 120 generates an even parity bit 213 according to a parity setting from the extracted data. The CPU 120 has a total of 11 bits such as a 1-bit start bit 205, an 8-bit data bit 207, a 1-bit parity bit 209, and a 1-bit stop bit 211 to make the CFS format. To generate digital data. The 1-bit parity bit 209 may not be used, or when used, odd or even parity 1-bit is used according to the parity setting.

The start bit 205 signals the start of communication.

The data bit 207 transmits, for example, 8 bits of data, and the number of bits to be used may be determined according to a register setting of the CPU 120.

The parity bit 209 generates and transmits a parity value for error verification, and the receiver determines an error. Three options, such as not used, even, and odd parity, can be selected according to the register setting of the CPU 120. If you select "Disable" this bit can be cleared.

The stop bit 211 signals the end of communication.

When the value of each bit is 0, the CPU 120 transmits a rectangular pulse of 1.2 kHz as an output, and when the value of each bit is 1, a rectangular pulse of 2.2 kHz is outputted every 833us (1200 Baud rate).

When a CFS instruction 201 of 1 word is made as shown in FIG. 2, each digital bit generates and transmits an FSK digital signal 203 for 1 and 0. When 12 words of CFS instruction format data are continuously composed, 11 bits of FSK digital signal per word are generated and transmitted.

3 is a detailed block diagram of a CPU of an underwater target detection apparatus according to an embodiment of the present invention.

The CPU of the underwater target detection device is functionally composed of an initialization processing unit 311, a command reception processing unit 313, and a CFS FSK signal generation unit 315.

The initialization processing unit 311 performs initialization of system time, timer, UART, general-purpose input/output (GPIO), and the like, which are peripheral devices of the microprocessor.

The command reception processing unit 313 receives the CFS command transmitted from the PC and analyzes and analyzes whether the command is a correct command (eg, a 12 Word CFS command format).

The CFS FSK signal generator 315 generates digital bits of start, data, parity, and stop in a 12-word CFS command format, and generates 1.2 kHz and 2.2 kHz square waves using a timer.

4 is a flowchart illustrating an operation of an initialization processing unit in a CPU of an underwater target detection apparatus according to an embodiment of the present invention.

The initialization processing unit 311 of FIG. 3 initializes the system time, which is a peripheral device of the microprocessor, in step 401. Initializing the system time means initializing the time used by the microprocessor.

The initialization processing unit 311 initializes the UART device for communication with the PC in step 403.

The initialization processing unit 311 initializes a timer to generate a square wave of the CFS signal in step 405.

The initialization processing unit 311 initializes the GPIO in step 407 to output the FSK digital signal.

5 is a flowchart illustrating an operation of a command receiving processing unit in a CPU of the underwater target detection apparatus according to an embodiment of the present invention.

The command reception processing unit 313 receives a command SET of 12 words in step 501.

The command reception processing unit 313 determines whether the CFS preamble is 0x55 from the command SET received in step 503.

If the CFS preamble is not 0x55, the command reception processing unit 313 performs end processing. However, when the CFS preamble is 0x55, the command reception processing unit 313 determines the correct command in step 505 and transmits an acknowledgment (ACK) indicating that the received data is transmitted to the PC as it is.

6 is a flowchart illustrating an operation of a CFS FSK processing unit in a CPU of the underwater target detection apparatus according to an embodiment of the present invention.

The CFS FSK signal generation unit 315 generates a parity bit set for each byte of 12-word data received in step 601.

The CFS FSK signal generator 315 initializes a bit count and a byte count, respectively, in order to generate an FSK digital square wave in step 603.

The CFS FSK signal generator 315 activates the timer in step 605.

7 is a flowchart illustrating a timer interrupt operation in an underwater target detection apparatus according to an embodiment of the present invention.

The CFS start bit to be described below has the same meaning as the start bit 205 of FIG. 2, the CFS parity bit has the same meaning as the parity bit 209 of FIG. 2, and the CFS stop bit is the stop bit 211 of FIG. It has the same meaning as and CFS data has the same meaning as the data 207 of FIG. 2.

Depending on the state of the bit count, square waves of 1.2 kHz and 2.2 kHz, which are FSK digital signals of start, data, parity, and stop bits, are generated. The routine of Fig. 7 is executed for 12 words.

The underwater target detection apparatus determines whether the bit count is set to 0 in step 701.

When the bit count is 0, the underwater target detection apparatus generates a CFS start bit in step 707. However, if the bit count is not 0, the underwater target detection apparatus determines whether the bit count is 9 in step 703.

If the bit count is 9, the underwater target detection apparatus generates a CFS parity bit. However, if the bit count is not 9, the underwater target detection apparatus determines whether the bit count is 10.

If the bit count is 10, the underwater target detection apparatus generates a CFS stop bit in step 711. After steps 707, 709, and 711, the underwater target detection apparatus proceeds to step 715.

Meanwhile, when the bit count is not 10, the underwater target detection apparatus proceeds to step 713 to generate CFS data.

The underwater target detection apparatus generates a bit count value by adding 1 to the bit count value in step 715.

After step 715, the underwater target device determines whether the bit count is greater than 11.

If the bit count value is not greater than 11, the process returns to step 701.

However, when the bit count value is greater than 11, the underwater target detection apparatus generates a byte value by adding 1 to the byte count value in step 719.

The underwater target detection apparatus determines whether the byte count value is greater than 12 in step 717. If the byte count value is less than or equal to 12, the underwater target detection apparatus returns to step 701.

If the byte count value is greater than 12, the underwater target detection device terminates.

Referring to FIG. 7, the timer may generate 1.2 kHz and 2.2 kHz square waves, which are FSK digital signals of start, data, parity, and stop bits according to the state of the bit count.

Since the present invention transmits a signal in the UHF frequency band, real-time operation control and/or real-time location tracking of the sonobui may be possible. In addition, since the present invention transmits the signal in the UHF frequency band, it is possible to quickly and accurately transmit the signal to the sono buoy. Accordingly, the present invention can improve the underwater detection efficiency of the sonobui.

An embodiment of the present invention may be implemented as a module or device capable of performing each method or function described above. In this case, the module may be implemented as a component of software and/or hardware. In addition, according to an embodiment of the present invention, the above-described method or function can be implemented as code that can be read by a processor in a medium on which a program is recorded. Examples of media that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (for example, transmission over the Internet). Include.

The above contents may be modified and modified without departing from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention belongs. Accordingly, the embodiments of the present invention are not intended to limit the technical idea, but to describe, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (12)

delete delete delete In the underwater target detection method,
Generating a command function select (CFS) command for controlling the operation of the sonobui;
Modulating the CFS command into an FSK (Frequency-Shift Keying) digital signal; And
Including the process of transmitting the modulated signal to the sonobuoy in a UHF (Ultra High Frequency) frequency band,
The CFS command consists of 1 word,
The 1 word CFS instruction includes a start bit of 1 bit, a data bit of 8 bits, a parity bit of 1 bit, and a stop bit of 1 bit,
The modulating process,
Generating a 1.2 kHz signal using a timer when the digital signal is 1 bit when the 1 word CFS command is generated; And
If the digital signal is 0 bits, using the timer to generate a signal of 2.2 kHz,
The modulating process,
When 12 words of CFS instructions are continuously configured, it includes a process of modulating into an FSK digital signal of 11 bits per 1 word, and
The 1.2 kHz and 2.2 kHz signals are generated in the form of UART (Universal Asynchronous Receiver/Transmitter) format. delete delete delete delete delete delete delete delete

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