KR20230083007A - Apparatus and method for receiving laser signals - Google Patents

Abstract

According to various embodiments of the present invention, an apparatus for receiving laser signals includes: a preprocessing part; a laser signal capture part; and a laser signal tracking part. By applying the apparatus and method for receiving laser signals, a low-speed clock-based calculation is performed rather than a high-speed clock-based laser signal capture and tracking method. Therefore, the difficulty, cost, and time of designing the receiving part of a laser tracker can be reduced.

Description

Laser signal receiving device and method {APPARATUS AND METHOD FOR RECEIVING LASER SIGNALS}

The present invention relates to a signal receiving apparatus and method. More specifically, the present invention relates to an apparatus and method for receiving a laser signal.

The contents described in this part merely provide background information on the present embodiment and do not constitute prior art.

Conventionally, as an ADC (Analog-digital converter) that has a pulse width of several nsec and operates at a fast clock to digitally process a laser signal that is periodically loaded is required, the logic for receiving the output of the ADC and processing the signal is also fast. It works as a clock. In order to detect a laser signal using the output of an ADC with a high-speed clock, a signal processing timing margin must be considered, which increases design complexity and consumes more power than logic operated with a low-speed clock.

Existing laser signal detection devices receive digital laser signals generated by passing through analog sensors and ADCs that recognize laser signals, compare them with known laser codes, output results, and set the minimum resolution number in consideration of laser code cycles. It can receive input and generate the corresponding clock frequency. The received laser signal is compared with the threshold in the laser code sampling block to reduce the amount of calculation, inputs the laser code number for laser code matching, generates a code in the laser code generation block, and samples the laser code and laser code in the laser code matching block. It receives the result as input and outputs the code matching result. Therefore, conventional laser signal detection devices use high-speed clocks for all functions in order to reduce the amount of calculation in the laser sampling block, resulting in complicated designs and high power consumption.

In addition, there is a method for lowering the clock speed for some logic, but there is no technique for lowering the clock speed for all logic. More specifically, the method of implementing the logic for reducing the amount of calculation in consideration of the minimum resolution number of the laser code has a problem in that the clock speed of the laser code tracking logic cannot be lowered although the clock speed of the laser code acquisition logic can be lowered.

Republic of Korea Patent Registration No. 10-1868100 (2018.06.08.) Republic of Korea Patent Registration No. 10-1868099 (2018.06.08.) Republic of Korea Patent Publication No. 10-2021-0099475 (2021.08.12.)

An object of the present invention is to provide a laser signal receiving device and method capable of reducing the design difficulty, cost, and time of a laser tracker receiver by performing a low-speed clock-based operation rather than a high-speed clock-based laser signal acquisition and tracking method. are doing

Other non-specified objects of the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

A laser signal receiving apparatus according to an embodiment of the present invention for achieving the above object determines a sampling frequency by receiving filter information including a size and a pulse width of a laser signal, and receives an analog laser signal reflected from a target. A pre-processing unit for converting the converted digital laser signal into a digital laser signal using the determined sampling frequency, a laser signal capturing unit for capturing the converted digital laser signal and performing signal processing using the determined sampling frequency, and tracking the captured laser signal and a laser signal tracking unit for performing signal processing using the determined sampling frequency and outputting information of the captured laser signal.

Here, the pre-processing unit may include a control unit that controls the pre-processing unit by receiving the filter information, and a filtering unit that determines the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information.

Here, the pre-processing unit includes a clock generation unit generating a clock frequency corresponding to the filter information, an analog-to-digital signal conversion unit converting an analog laser signal into a digital laser signal using the generated clock frequency as the sampling frequency, and the It is characterized in that it includes a first switch that is connected to the controller and controls whether the filtering unit and the clock generator operate.

Here, the clock generation unit receives filter information output from an interval memory for recording a plurality of frequencies, a second switch that selects and transmits a specific frequency among the plurality of frequencies, and converts the specific frequency into a clock frequency. and a clock frequency generator for transmitting the converted clock frequency to the analog-to-digital signal converter.

Here, the filtering unit includes a first filter that passes only frequency signals of a predetermined first reference frequency or less, a second filter that passes only frequency signals of a predetermined second reference frequency or more, and an amplifier that amplifies power of the laser signal. It is characterized by doing.

Here, the first filter determines the pulse width by a predetermined number of N (N = 0, 1, 2 ...), and the second filter determines the pulse width by a predetermined number of M (M = 0, 1, 2 ...), and the interval memory stores (N X M) frequencies.

In the laser signal receiving method performed by the laser signal receiving apparatus according to an embodiment of the present invention for achieving the above object, the pre-processing unit receives filter information including the size and pulse width of the laser signal and determines the sampling frequency. And receiving the analog laser signal reflected from the target and converting it into a digital laser signal using the determined sampling frequency. A laser signal capture unit captures the converted digital laser signal and performs signal processing using the determined sampling frequency. and a laser signal tracking unit tracking the captured laser signal, performing signal processing using the determined sampling frequency, and outputting information of the captured laser signal.

Here, the pre-processing unit determines the sampling frequency by receiving filter information including the size and pulse width of the laser signal, receives the analog laser signal reflected from the target, and converts it into a digital laser signal using the determined sampling frequency The step may include controlling the pre-processing unit by receiving the filter information, and determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information.

Here, the pre-processing unit determines the sampling frequency by receiving filter information including the size and pulse width of the laser signal, receives the analog laser signal reflected from the target, and converts it into a digital laser signal using the determined sampling frequency The steps include generating a clock frequency corresponding to the filter information, converting an analog laser signal into a digital laser signal using the generated clock frequency as the sampling frequency, and generating a clock frequency corresponding to the filter information and controlling whether or not to perform the step of determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the step and the filter information.

Here, the step of generating a clock frequency corresponding to the filter information includes recording a plurality of frequencies, selecting and transmitting a specific frequency among the plurality of frequencies, and receiving the filter information to determine the specific frequency as a clock frequency. and transmitting the converted clock frequency to an analog-to-digital signal conversion unit.

Here, the step of determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information includes passing only frequency signals of a predetermined first reference frequency or less, and a frequency signal of a predetermined second reference frequency or higher. It is characterized in that it comprises the step of passing only and the step of amplifying the power of the laser signal.

A laser signal detection system according to an embodiment of the present invention for achieving the above object determines a sampling frequency by receiving filter information including the magnitude and pulse width of a laser signal, and receives an analog laser signal reflected from a target. A pre-processing unit for converting the converted digital laser signal into a digital laser signal using the determined sampling frequency, a laser signal capturing unit for capturing the converted digital laser signal and performing signal processing using the determined sampling frequency, and tracking the captured laser signal a laser signal receiving device including a laser signal tracking unit which performs signal processing using the determined sampling frequency and outputs information of the captured laser signal; and

and a laser signal transmitting device for transmitting a laser signal toward a target based on the laser signal receiving device and a predefined laser code.

Here, the laser signal transmission device includes a laser pulse setting unit for setting a laser pulse width, a laser period setting unit for setting a laser cycle with a cycle of a laser signal captured by the laser signal capture unit, and a laser based on the laser code. Characterized in that it comprises a; laser signal detection unit for detecting the signal.

As described above, according to various embodiments of the present invention, by applying the laser signal receiving device and method, the design difficulty of the laser tracker receiver is performed by performing a low-speed clock-based operation rather than a high-speed clock-based laser signal capture and tracking method. , cost and time can be reduced.

Even if the effects are not explicitly mentioned here, the effects described in the following specification expected by the technical features of the present invention and their provisional effects are treated as described in the specification of the present invention.

1 is a block diagram schematically showing the configuration of a prior art laser signal reception logic and a laser signal reception logic according to an embodiment of the present invention.
2 is a block diagram schematically showing the configuration of a laser signal detection system according to an embodiment of the present invention.
3 is a block diagram schematically showing the configuration of a pre-processing unit according to an embodiment of the present invention.
4 is a block diagram schematically illustrating the configuration of a clock generator according to an embodiment of the present invention.
5 and 6 are diagrams for explaining a signal processing process of a laser signal receiving apparatus according to an embodiment of the present invention.
7 is a flowchart illustrating a laser signal receiving method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and the common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification. Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined. Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention, and singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded. Terms including ordinal numbers such as second and first may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

In this specification, identification codes (eg, a, b, c, etc.) for each step are used for convenience of explanation, and identification codes do not describe the order of each step, and each step is clearly Unless a specific order is specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

In this specification, expressions such as "has", "may have", "includes" or "may include" indicate the existence of a corresponding feature (eg, numerical value, function, operation, or component such as a part). indicated, and does not preclude the presence of additional features.

In addition, the term '~unit' described in this specification may mean software or a hardware component such as a field-programmable gate array (FPGA) or ASIC, and '~unit' performs certain roles. However, '~ part' is not limited to software or hardware. '~bu' may be configured to be in an addressable storage medium and may be configured to reproduce one or more processors. Therefore, as an example, '~unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data structures and variables. Functions provided within components and '~units' may be combined into smaller numbers of components and '~units' or further separated into additional components and '~units'.

Hereinafter, various embodiments of a laser signal receiving apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

Embodiments described in this specification can be applied to transmitters and receivers in the field of electronic warfare requiring electronic attacks, such as laser signal trackers, electronic warfare receivers, radar warning receivers, and electronic attack signal generators. In particular, in the present invention, a laser signal receiving device mounted on a laser searcher and capable of detecting a laser signal will be described. In addition, the present invention describes a laser signal detection system capable of detecting both a Pulse Repetition Frequency (PRF) code and a Pulse Interval Modulation (PIM) code.

1 is a block diagram schematically showing the configuration of a prior art laser signal reception logic and a laser signal reception logic according to an embodiment of the present invention.

1 (a) to (b) are block diagrams schematically showing the configuration of a prior art laser signal reception logic.

Conventionally, as an ADC that has a pulse width of several nsec and operates at a fast clock to digitally process a laser signal that is periodically loaded is required, the logic for receiving the output of the ADC and processing the signal is also operated at a fast clock. In order to detect a laser signal using the output of an ADC with a high-speed clock, a signal processing timing margin must be considered, which increases design complexity and consumes more power than logic operated with a low-speed clock.

Existing laser signal detection devices receive digital laser signals generated by passing through analog sensors and ADCs that recognize laser signals, compare them with known laser codes, output results, and set the minimum resolution number in consideration of laser code cycles. It can receive input and generate the corresponding clock frequency. The received laser signal is compared with the threshold in the laser code sampling block to reduce the amount of calculation, inputs the laser code number for laser code matching, generates a code in the laser code generation block, and samples the laser code and laser code in the laser code matching block. It receives the result as input and outputs the code matching result. Therefore, conventional laser signal detection devices use high-speed clocks for all functions in order to reduce the amount of calculation in the laser sampling block, resulting in complicated designs and high power consumption.

In addition, there is a method for lowering the clock speed for some logic, but there is no technique for lowering the clock speed for all logic.

The clock means that all parts of a computer, including the CPU, operate in accordance with a specific signal, and this specific signal means. The clock is generated by a clock generator, and the higher the number of clocks, the faster the processing speed.

As shown in (a) of FIG. 1, as shown in (b) of FIG. 1, all logic blocks except for the laser signal reception logic using the high-speed clock and the laser signal acquisition logic use the high-speed clock. Although a laser signal reception logic used has been proposed, as shown in FIG. 1(c), a laser signal reception logic in which all logic blocks use a low-speed clock has not been proposed.

By applying the laser signal receiving apparatus and method according to various embodiments of the present invention, the design difficulty, cost, and time of the laser tracker receiver are reduced by performing low-speed clock-based calculations rather than high-speed clock-based laser signal capture and tracking methods. can be reduced

In the present invention, the low speed preferably means 1 MHz or more and 100 MHz or less.

Clocks exceeding 100 MHz can be considered high-speed clocks.

2 is a block diagram schematically showing the configuration of a laser signal detection system according to an embodiment of the present invention.

Referring to FIG. 2 , the laser signal detection system 10 includes a laser signal receiving device 100 and a laser signal transmitting device 200 .

The laser signal receiving device 100 includes a pre-processing unit 110, a laser signal capturing unit 140, and a laser signal tracking unit 150. The laser signal receiving device 100 may receive an analog laser signal reflected from the target 300 .

The pre-processor 110 may determine a sampling frequency, receive an analog laser signal reflected from the target 300 using the determined sampling frequency, and convert it into a digital laser signal. More specifically, the sampling frequency is determined by receiving filter information including the size and pulse width of the laser signal, and the analog laser signal reflected from the target 300 is received and converted into a digital laser signal using the determined sampling frequency. can do. The pre-processing unit 110 may receive the laser signal received by the laser signal receiving device 100 and reduce the amount of calculation of the laser signal capturing unit 140 and the laser signal tracking unit 150 .

The pre-processing unit 110 will be described in detail with reference to FIG. 3 .

The laser signal capture unit 140 may capture the converted digital laser signal using the determined sampling frequency. More specifically, the laser signal capture unit 140 may capture the converted digital laser signal and perform signal processing in synchronization with the sampling frequency determined by the pre-processor 110 .

The laser signal tracking unit 150 may track the captured laser signal using the determined sampling frequency and output information of the captured laser signal to a display unit (not shown). The laser signal tracking unit 150 may track the cycle of the captured laser signal and transfer the tracked cycle of the laser signal to the laser signal capturing unit 140 . The laser signal tracking unit 150 may track the captured laser signal and perform signal processing in synchronization with the sampling frequency determined by the pre-processing unit 110 .

The laser signal transmission device 200 includes a laser pulse setting unit 210, a laser period setting unit 230, and a laser signal detection unit 250. The laser signal transmitting device 200 may transmit a laser signal toward a target based on the laser signal receiving device 100 and a predefined laser code.

The laser pulse setting unit 210 may set a laser pulse width based on a laser pulse width length input by an operator.

The laser period setting unit 230 may set the period of the laser to the period of the laser signal captured by the laser signal capture unit 140 .

The laser signal detection unit 250 may detect a laser signal based on a matching signal formed by a laser pulse and a laser period. Specifically, the laser signal detector 250 may select and transmit PRF/PIM to the target 300 . The laser signal detector 250 may detect a laser signal based on a defined laser code. According to an embodiment of the present invention, the laser signal transmission device 200 may select the laser signal reception device 100 and a predefined pulse width, laser period, and PRF/PIM.

The laser signal detector 250 may detect both a Pulse Repetition Frequency (PRF) code and a Pulse Interval Modulation (PIM) code. Here, PRF (Pulse Repetition Frequency) represents pulse repetition frequency, and PIM (Pulse Interval Modulation) represents pulse interval modulation.

PRF (Pulse Repetition Frequency) refers to the number of pulses transmitted per second, and through this, the detection distance and speed of the target can be measured, but is not necessarily limited thereto.

PIM (Pulse Interval Modulation) has high information transfer efficiency per unit time. That is, although frequency efficiency is high and n binary signal groups can be expressed with 2n light pulse position time intervals, it is not necessarily limited thereto.

According to an embodiment of the present invention, the PRF/PIM code period information is an output of a laser code generator (not shown) located inside or outside the laser signal receiving device, and may be a result value according to a code number.

According to another embodiment of the present invention, the laser signal capture unit 140 receives laser code period information (eg, PRF/PIM code period information) generated by the laser code generator, and converts based on the received laser code period information. A digital laser signal may be captured, and signal processing may be performed by synchronizing with the sampling frequency determined by the pre-processing unit 110 .

All blocks shown in FIG. 2 are not essential components, and in other embodiments, some blocks connected to the laser signal detection system 10 may be added, changed, or deleted.

3 is a block diagram schematically showing the configuration of a pre-processing unit according to an embodiment of the present invention.

The pre-processing unit 110 includes a control unit 111, a first switch 112, an analog-to-digital signal conversion unit 113, a filtering unit 120, and a clock generator 130.

The control unit 111 may control the pre-processing unit 110 by receiving filter information including the size and pulse width of the laser signal input by the operator.

The filtering unit 120 may determine the size and pulse width of the laser signal received by the laser signal receiving apparatus 100 in response to filter information received by the control unit 111 . The filtering unit 120 includes a first filter 121, a second filter 122, an amplifier 123 and a filter generator 124.

The first filter 121 may pass only signals with a frequency equal to or less than a predetermined first reference frequency. According to an embodiment of the present invention, the first filter 121 may be a low pass filter (LPF). The first filter 121 may determine pulse widths by a predetermined number of N (N=0,1,2??).

The second filter 122 may pass only signals having a frequency equal to or higher than a predetermined second reference frequency. According to an embodiment of the present invention, the second filter 122 may be a high pass filter (HPF). The second filter 122 may determine pulse widths by a predetermined number of M (M=0,1,2??).

The amplifier 123 may amplify the power of the laser signal received by the laser signal receiving apparatus 100 in response to the filter information. The amplifier 123 (AMP) may amplify the power of the laser signal received by the laser signal receiving apparatus 100 through various methods known in advance.

The filter generator 124 may generate or adjust the first filter 121 and the second filter 122 so that the control unit 111 can determine the pulse width corresponding to the input filter information.

The clock generator 130 may generate a clock frequency in response to the filter information received by the control unit 111 .

The clock generator 130 will be described in detail with reference to FIG. 4 .

The analog-to-digital signal converter 113 may determine the clock frequency generated by the clock generator 130 as the sampling frequency and convert the analog radio signal received from the outside into a digital signal. According to an embodiment of the present invention, the analog-to-digital signal converter 113 may be an AD converter (ADC).

The first switch 112 is connected to the controller 111 to control whether the filtering unit 120 and the clock generator 130 operate.

All blocks shown in FIG. 3 are not essential components, and some blocks connected to the pre-processing unit 110 may be added, changed, or deleted in another embodiment.

4 is a block diagram schematically illustrating the configuration of a clock generator according to an embodiment of the present invention.

The clock generator 130 includes an interval memory 131 , a second switch 122 and a clock frequency generator 123 .

Interval memory 131 can record multiple frequencies. According to an embodiment of the present invention, the interval memory 112 may be formed of an interval ROM, and may be a memory that can read data recorded once at a high speed, but cannot be written again, but is not necessarily limited thereto. . In the interval memory 131, the first filter 121 may determine pulse widths by a predetermined number of N (N = 0, 1, 2...), and the second filter 122 may determine a pulse width of a predetermined number of M If pulse widths can be determined by the number of (M = 0, 1, 2...), (N X M) frequencies can be stored.

For example, if the first filter 121 can determine three pulse widths and the second filter 122 can determine three pulse widths, the filtering unit 120 can determine a total of nine pulse widths. can be determined, and the interval memory 131 can store a total of 9 frequency values.

The interval memory 131 is preferably implemented to store only frequencies having values equal to or less than a predetermined reference frequency value (eg, 100 MHz).

According to an embodiment of the present invention, the interval memory 131 may store a total of 9 frequency values having a difference by a predetermined interval (eg, 1 MHz). For example, the interval memory 131 may store frequency values corresponding to 92 MHz, 93 MHz, 94 MHz, 95 MHz, 96 MHz, 97 MHz, 98 MHz, 99 MHz, and 100 MHz.

The second switch 122 may select a specific frequency from among a plurality of frequencies stored in the interval memory 131 and transfer the selected frequency to the clock frequency generator 123 .

The clock frequency generation unit 123 receives the filter information received and outputted by the control unit 111 and converts the specific frequency transmitted by the second switch 122 into a clock frequency, and converts the converted clock frequency into an analog-digital signal. It can be transmitted to the conversion unit 113. The clock generator 130 may select a specific frequency from N frequencies through the second switch 122 and transmit it to the analog-to-digital signal conversion unit 113, but is not necessarily limited thereto, and as described above, the switch ( 114), a clock frequency may be generated by selecting a specific frequency among frequencies divided into a plurality of intervals.

5 and 6 are diagrams for explaining a signal processing process of a laser signal receiving apparatus according to an embodiment of the present invention.

Referring to FIG. 5 , first, it is assumed that the pulse width of the analog laser signal received by the laser signal receiving apparatus 100 is 15nsec. When the filtering unit 120 is not operated under the control of the first switch 112, the pulse width of the laser signal as received by the laser signal receiving apparatus 100 may be maintained at 15nsec.

When the clock frequency generated by the clock generation unit 130 in response to the filter information input by the operator is 200 MHz, the analog-to-digital signal conversion unit 113 may perform signal conversion using 200 MHz as a sampling frequency. The analog laser signal received by the laser signal receiving apparatus 100 may be sampled as 5 digital signals and converted into digital laser signals.

The laser signal capture unit 140 and the laser signal tracking unit 150 may perform signal processing in synchronization with the sampling frequency of 200 MHz.

Referring to FIG. 6 , first, it is assumed that the pulse width of the analog laser signal received by the laser signal receiving apparatus 100 is 15nsec. When the filtering unit 120 operates under the control of the first switch 112, the filtering unit 120 responds to the filter information input by the operator to the pulse of the laser signal received by the laser signal receiving apparatus 100. The width can be doubled to 30 nsec.

When the clock frequency generated by the clock generation unit 130 in response to the filter information input by the operator is 100 MHz, the analog-to-digital signal conversion unit 113 may perform signal conversion using 100 MHz as a sampling frequency. The analog laser signal received by the laser signal receiving apparatus 100 may be sampled as 5 digital signals and converted into digital laser signals.

The laser signal capture unit 140 and the laser signal tracking unit 150 may perform signal processing in synchronization with the sampling frequency of 100 MHz.

Hereinafter, a target detection method according to an embodiment of the present invention will be described with reference to FIG. 7 .

7 is a flowchart illustrating a laser signal receiving method according to an embodiment of the present invention.

In step S701 , the laser signal receiving apparatus 100 may determine a sampling frequency, receive an analog laser signal reflected from a target using the determined sampling frequency, and convert it into a digital laser signal.

In step S702, the laser signal receiving apparatus 100 may capture the converted digital laser signal and perform signal processing using the determined sampling frequency.

In step S703, the laser signal receiving apparatus 100 may track the captured laser signal, perform signal processing using the determined sampling frequency, and output information on the captured laser signal.

In FIG. 7, it is described that each process is sequentially executed, but this is merely an example, and a person skilled in the art changes and executes the sequence described in FIG. 7 within the range not departing from the essential characteristics of the embodiment of the present invention Alternatively, it will be possible to apply various modifications and variations by executing one or more processes in parallel or adding another process.

Components included in the laser signal receiving device 100 and the laser signal transmitting device 200 are shown separately in FIG. 2 , but a plurality of components may be combined with each other to be implemented as at least one module. The components are connected to a communication path connecting software modules or hardware modules inside the device and operate organically with each other. These components communicate using one or more communication buses or signal lines.

The laser signal receiving device 100 and the laser signal transmitting device 200 may be implemented in a logic circuit by hardware, firmware, software, or a combination thereof, or may be implemented using a general-purpose or special-purpose computer. The device may be implemented using a hardwired device, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or the like. In addition, the device may be implemented as a System on Chip (SoC) including one or more processors and controllers.

The laser signal receiving apparatus 100 and the laser signal transmitting apparatus 200 may be installed in a computing device equipped with hardware elements in the form of software, hardware, or a combination thereof. A computing device is a variety of devices including all or part of a communication device such as a communication modem for communicating with various devices or a communication network, a memory for storing data for executing a program, and a microprocessor for performing calculations and commands by executing a program. can mean

Even though all components constituting the embodiments of the present invention described above are described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate. In addition, although all of the components may be implemented as a single independent piece of hardware, some or all of the components are selectively combined to perform some or all of the combined functions in one or a plurality of pieces of hardware. It may be implemented as a computer program having. In addition, such a computer program may implement an embodiment of the present invention by being stored in a computer readable medium such as a USB memory, a CD disk, or a flash memory and read and executed by a computer. A recording medium of a computer program may include a magnetic recording medium, an optical recording medium, and the like.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: laser signal detection system
100: laser signal receiving device
110: pre-processing unit
111: control unit
112: first switch
113: analog-digital signal conversion unit
120: filtering unit
130: clock generator
140: laser signal capture unit
150: laser signal tracking unit
200: laser signal transmission device
210: laser pulse setting unit
230: laser cycle setting unit
250: laser signal detection unit

Claims (13)

a pre-processing unit that receives filter information including the magnitude and pulse width of the laser signal, determines a sampling frequency, receives an analog laser signal reflected from the target, and converts the analog laser signal into a digital laser signal using the determined sampling frequency;
a laser signal capture unit that captures the converted digital laser signal and performs signal processing using the determined sampling frequency; and
and a laser signal tracking unit that tracks the captured laser signal, performs signal processing using the determined sampling frequency, and outputs information on the captured laser signal. According to claim 1,
The pre-processing unit,
a control unit for receiving the filter information and controlling the pre-processing unit; and
and a filtering unit configured to determine an amplitude and a pulse width of the laser signal received by the pre-processing unit in response to the filter information. According to claim 2,
The pre-processing unit,
a clock generator generating a clock frequency corresponding to the filter information;
an analog-to-digital signal converter for converting an analog laser signal into a digital laser signal by using the generated clock frequency as the sampling frequency; and
and a first switch connected to the control unit to control whether the filtering unit and the clock generator unit operate. According to claim 3,
The clock generator,
an interval memory that records multiple frequencies;
a second switch that selects and transmits a specific frequency among the plurality of frequencies; and
and a clock frequency generation unit receiving the filter information output from the control unit, converting the specific frequency into a clock frequency, and transmitting the converted clock frequency to the analog-digital signal conversion unit. According to claim 4,
The filtering unit,
a first filter for passing only signals with a frequency equal to or less than a predetermined first reference frequency;
a second filter for passing only signals having a frequency equal to or higher than a predetermined second reference frequency; and
A laser signal receiving device comprising an amplifier for amplifying power of the laser signal. According to claim 5,
The first filter,
Determine the pulse width by a predetermined number of N (N = 0, 1, 2 ...),
The second filter,
Determine the pulse width by a predetermined number of M (M = 0, 1, 2 ...),
The interval memory,
A laser signal receiving device characterized in that for storing (NXM) number of frequencies. A laser signal receiving method performed by a laser signal receiving device,
Step, by a pre-processing unit, receiving filter information including the magnitude and pulse width of the laser signal, determining a sampling frequency, receiving an analog laser signal reflected from the target, and converting the analog laser signal into a digital laser signal using the determined sampling frequency;
a laser signal capturing unit capturing the converted digital laser signal and performing signal processing using the determined sampling frequency; and
A laser signal receiving method comprising: tracking the captured laser signal, performing signal processing using the determined sampling frequency, and outputting information of the captured laser signal, by a laser signal tracking unit. According to claim 7,
The pre-processing unit receives filter information including the size and pulse width of the laser signal, determines a sampling frequency, receives the analog laser signal reflected from the target, and converts it into a digital laser signal using the determined sampling frequency. ,
receiving the filter information and controlling the pre-processing unit; and
and determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information. According to claim 8,
The pre-processing unit receives filter information including the size and pulse width of the laser signal, determines a sampling frequency, receives the analog laser signal reflected from the target, and converts it into a digital laser signal using the determined sampling frequency. ,
generating a clock frequency corresponding to the filter information;
converting an analog laser signal into a digital laser signal by using the generated clock frequency as the sampling frequency; and
Controlling whether the step of generating a clock frequency corresponding to the filter information and the step of determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information are performed; characterized in that it comprises a How to receive the laser signal. According to claim 9,
Generating a clock frequency in response to the filter information includes:
recording multiple frequencies;
Selecting and transmitting a specific frequency among the plurality of frequencies; and
and receiving the filter information, converting the specific frequency into a clock frequency, and transmitting the converted clock frequency to an analog-to-digital signal converter. According to claim 10,
The step of determining the magnitude and pulse width of the laser signal received by the pre-processing unit in response to the filter information,
Passing only signals with a frequency equal to or less than a predetermined first reference frequency;
Passing only signals with a frequency equal to or higher than a predetermined second reference frequency; and
A laser signal receiving method comprising a; step of amplifying the power of the laser signal. A pre-processing unit that receives filter information including the magnitude and pulse width of the laser signal, determines the sampling frequency, receives the analog laser signal reflected from the target, and converts it into a digital laser signal using the determined sampling frequency; A laser signal capturing unit that captures a digital laser signal and performs signal processing using the determined sampling frequency, and tracks the captured laser signal and performs signal processing using the determined sampling frequency, and information of the captured laser signal A laser signal receiving device including a laser signal tracking unit for outputting; and
A laser signal detection system comprising: the laser signal receiving device and a laser signal transmitting device for transmitting a laser signal toward a target based on a predefined laser code. According to claim 12,
The laser signal transmission device,
a laser pulse setting unit for setting a laser pulse width;
a laser cycle setting unit for setting a cycle of a laser based on a cycle of the laser signal captured by the laser signal capturing unit; and
A laser signal detection system comprising a; laser signal detector for detecting a laser signal based on the laser code.

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