Multi-functional fuse and operation method thereof

Abstract

The present invention relates to a multi-functional fuse and an operation method thereof. The multi-functional fuse comprises: a fuse function setting module providing setting information corresponding to at least one operation mode among a proximity fuse mode, a time fuse mode, a point detonation fuse mode, and a point detonating delay fuse mode; a detonation control module for detonating a fuse in response to a detonation control signal; a signal processing module which provides the detonation control signal corresponding to one operation mode among the proximity fuse mode, the time fuse mode, the point detonation fuse mode, and the point detonating delay fuse mode according to the setting information provided from the fuse function setting module, wherein the signal processing module provides the detonation control signal according to a calculation value corresponding to a provided distance detection signal after providing a sensing control signal for sensing the distance to a target in the proximity fuse mode, and provides the detonation control signal in one operation mode among the time fuse mode, the point detonation fuse mode, and the point detonating delay fuse mode; and an RF module providing a proximity detection signal obtained by measuring the distance to the target according to the sensing control signal provided from the signal processing module. Accordingly, the multi-functional fuse makes it possible to selectively operate a fuse function according to the usage environment of a projectile, and thus can maximize operational efficiency and logistics support efficiency.

Description

Multifunctional fuse and method of operation thereof

[0001] The present invention relates to a multi-functional fuse and a method of operation thereof, which can maximize the efficiency of operations and logistics support by enabling the selective operation of fuse functions according to the usage environment of the ammunition, wherein a signal processing module provides a detonation control signal according to loading information provided from a fuse function loading module, and the detonation control module outputs a detonation signal corresponding to any one of an operating mode among a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode according to the detonation control signal, wherein a sensing control signal for sensing the distance to a target is provided in the proximity fuse mode, a detonation signal is provided according to a proximity detection signal that measures the distance to the target, and a detonation signal corresponding to any one of an operating mode among a time fuse mode, an impact fuse mode, and an impact delay fuse mode is provided.

[0002]

[0003] As is well known, a fuse refers to a device that functions to initiate the initial process of an explosive chain by igniting the propellant charge of an explosive device to cause an explosion; once an explosive is detonated, it causes the next explosive to explode, eventually igniting the propellant charge of a shell, and such a fuse can constitute part of the projectile.

[0004] Here, ammunition is classified in various ways according to its purpose of use, such as high-explosive, shaped-charge, armor-piercing, and dual-purpose projectiles, and a fuse system suitable for the characteristics of each projectile is required. These can be classified into proximity fuses, which are set to explode at a specific distance from the target; time fuses, which are set to explode at a preset time after firing; point detonation fuses, which are set to explode upon impact with the target; and point detonating delay fuses, which are set to explode after reaching a preset time following impact with the target.

[0005] Meanwhile, proximity fuses, time fuses, impact fuses, and impact delay fuses are currently used for howitzer shells depending on the operational purpose, but a multi-functional fuse that integrates the various functions of these fuses into a single fuse is currently being researched and developed.

[0006] Accordingly, there is a need for the technological development of multi-functional fuses and their operation techniques that can maximize the efficiency of operations and logistics support by allowing the fuse function to be selectively operated according to the ammunition's usage environment.

[0007] [Prior Art Literature]

[0008] 1. Korean Registered Patent No. 10-1343422 (Registered Dec. 13, 2013)

[0009]

[0010] The present invention aims to provide a multi-functional fuse and a method of operation thereof that can maximize the efficiency of operations and logistics support by enabling the selective operation of fuse functions according to the ammunition's usage environment, wherein a signal processing module provides a detonation control signal according to loading information provided by a fuse function loading module, and the detonation control module outputs a detonation signal corresponding to any one of the operating modes of a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode according to the detonation control signal; wherein, in the proximity fuse mode, a sensing control signal for sensing the distance to a target is provided, a detonation signal is provided according to a proximity detection signal that measures the distance to the target, and a detonation signal corresponding to any one of the operating modes of a time fuse mode, an impact fuse mode, and an impact delay fuse mode is provided.

[0011]

[0012] The purposes of the embodiments of the present invention are not limited to those mentioned above, and other unmentioned purposes will be clearly understood by those skilled in the art from the description below.

[0013]

[0014] According to one aspect of the present invention, a multifunctional fuse may be provided comprising: a fuse function loading module that provides loading information corresponding to at least one operating mode among a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode; a detonation control module that detonates a fuse according to a detonation control signal; a signal processing module that provides the detonation control signal corresponding to any one operating mode among the proximity fuse mode, the time fuse mode, the impact fuse mode, and the impact delay fuse mode according to the loading information provided by the fuse function loading module, wherein the signal processing module provides a sensing control signal for sensing the distance to a target in the proximity fuse mode, then provides the detonation control signal according to a calculated value corresponding to the provided distance detection signal, and provides the detonation control signal in any one operating mode among the time fuse mode, the impact fuse mode, and the impact delay fuse mode; and an RF module that provides the proximity detection signal that measures the distance to the target according to the sensing control signal provided by the signal processing module.

[0015] In addition, according to one aspect of the present invention, the multifunctional fuse may be provided such that when a projectile equipped with the multifunctional fuse is fired, the power supply is activated and the fuse function loading module, detonation control module, signal processing module, and RF module operate, wherein the fuse function loading module transmits loading information to the signal processing module, the detonation control module transmits detonation status information to the signal processing module, and the signal processing module checks the fuse function and the operating status of the fuse components.

[0016] In addition, according to one aspect of the present invention, the signal processing module may be provided with a multifunctional fuse that provides a detonation control signal to the detonation control module when the calculated value, obtained by FFT-converting the proximity sensing signal to calculate the distance in the case of the proximity fuse mode, becomes a preset detonation altitude.

[0017] In addition, according to one aspect of the present invention, the signal processing module may be provided with a multifunctional fuse that provides the detonation control signal to the detonation control module when a preset time for the fuse in the case of the time fuse mode has elapsed.

[0018] In addition, according to one aspect of the present invention, the detonation control module may be provided with a multifunctional fuse that senses a collision with the target through an impact switch in accordance with the detonation control signal in the case of the impact fuse mode or impact delay fuse mode, and detonates the fuse depending on whether there is an impact delay time.

[0019]

[0020] According to another aspect of the present invention, a method for operating a multi-functional fuse device may be provided, comprising the steps of: activating a power supply to operate a fuse function loading module, a detonation control module, a signal processing module, and an RF module when a projectile equipped with a multi-functional fuse is fired; obtaining loading information corresponding to at least one operating mode among a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode from the fuse function loading module in the signal processing module; obtaining detonation state information from the detonation control module in the signal processing module; providing a detonation control signal corresponding to any one operating mode among the proximity fuse mode, the time fuse mode, the impact fuse mode, and the impact delay fuse mode to the detonation control module in accordance with the loading information and the detonation state information in the signal processing module; and detonating the fuse in accordance with the detonation control signal provided from the signal processing module in the detonation control module.

[0021] Additionally, according to another aspect of the present invention, the step of providing the detonation control signal to the detonation control module may provide a method of operating a multi-functional fuse in which, in the case of the proximity fuse mode, a sensing control signal for sensing the distance to a target is provided to the RF module from the signal processing module, and then a proximity detection signal measuring the distance to the target is received from the RF module, and when the calculated value calculated through FFT transformation becomes a preset detonation altitude, the detonation control signal is provided.

[0022] In addition, according to another aspect of the present invention, the step of providing the detonation control signal to the detonation control module may be provided as a method of operating a multi-functional fuse in which, in the case of the time fuse mode, the detonation control signal is provided when a time fuse preset by the signal processing module has elapsed.

[0023] Additionally, according to another aspect of the present invention, the step of detonating the fuse may be provided in a method of operating a multi-functional fuse in which, in the case of the impact fuse mode or impact delay fuse mode, the detonation control module senses a collision with the target through an impact switch according to the detonation control signal, and detonates the fuse depending on whether there is an impact delay time.

[0024]

[0025] The present invention provides a detonation control signal from a signal processing module according to loading information provided by a fuse function loading module, and outputs a detonation signal corresponding to any one of an operating mode among a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode according to the detonation control signal from the detonation control module. In the proximity fuse mode, a sensing control signal is provided to sense the distance to a target, and a detonation signal is provided according to a proximity detection signal that measures the distance to the target. By providing a detonation signal corresponding to any one of an operating mode among a time fuse mode, an impact fuse mode, and an impact delay fuse mode, the fuse function can be selectively operated according to the usage environment of the ammunition, thereby maximizing the efficiency of operations and logistics support.

[0026]

[0027] FIG. 1 is a block diagram of a multifunctional fuse according to one embodiment of the present invention, and

[0028] FIGS. 2 to 8 are drawings for explaining the detailed configuration of a multifunctional fuse according to an embodiment of the present invention, and

[0029] FIG. 9 is a flowchart illustrating the process of operating a multifunctional fuse according to another embodiment of the present invention, and

[0030] FIGS. 10 to 13 are flowcharts illustrating the process of operating a multi-functional fuse according to fuse function in accordance with another embodiment of the present invention.

[0031]

[0032] The advantages and features of the embodiments of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0033] In describing the embodiments of the present invention, specific descriptions of known functions or configurations will be omitted if it is determined that such detailed descriptions could unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions in the embodiments of the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification.

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0035]

[0036] FIG. 1 is a block diagram of a multifunctional fuse according to one embodiment of the present invention, and FIGS. 2 to 8 are drawings for explaining the detailed configuration of a multifunctional fuse according to one embodiment of the present invention.

[0037]

[0038] Referring to FIGS. 1 to 8, a multifunctional fuse according to one embodiment of the present invention may include a fuse function loading module (110), a detonation control module (120), a signal processing module (130), an RF module (140), etc.

[0039]

[0040] The fuse function loading module (110) is a module that provides loading information corresponding to at least one operating mode among a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode, and can be operated by activating the power supply when firing a bullet equipped with a multi-functional fuse device according to one embodiment of the present invention.

[0041] Here, the fuse as described above uses a liquid storage battery (i.e., a liquid storage type battery), and when the projectile is fired, the power supply is activated by the reverse inertia force and rotational force, so that the fuse function loading module (110), detonation control module (120), signal processing module (130), and RF module (140) can be operated.

[0042] This fuse function loading module (110) can communicate with the signal processing module (130) through an input / output port and stores loading information corresponding to the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode (e.g., detonation altitude for proximity detonation, time limit time (self-detonation time) for time limit detonation, whether to detonate impact for impact detonation, impact delay time for impact delay detonation, etc.), and these can be extracted from the module's operating state and provided to the signal processing module (130).

[0043] Referring to FIG. 2, the communication method of the fuse function loading module (110) as described above can be explained as follows: according to the signal timing diagram and the data specifications for transmission as shown in FIG. 2, the internal module of the first main controller unit equipped in the fuse function loading module (110) can be set to 8 bits, the transmission data (i.e., loading information) can be loaded into the BIT [3:0] of the transmission signal, and the remaining BIT [7:4] can be filled with '1111' and transmitted, and the transmission side STOP bit can be set to 2 bits.

[0044] In addition, the communication standard can be set to 38400 bps, start1, data4, and stop2, and a special code for packet start synchronization can be used, and the transmission data to be transmitted (i.e., loading information) can be transmitted to the signal processing module (130) by separating one byte into upper and lower nibs and dividing them into lower and upper 4 bits each.

[0045]

[0046] The detonation control module (120) is a module that provides detonation state information and detonates a fuse according to a detonation control signal, and can be operated by activating the power supply when firing a projectile equipped with a multi-functional fuse device according to one embodiment of the present invention.

[0047] In the case of an impact fuse mode or an impact delay fuse mode, this detonation control module (120) can sense a collision with a target through an impact switch according to a detonation control signal provided by a signal processing module (130), and detonate the fuse according to whether or not there is an impact delay time provided by the signal processing module (130).

[0048] For example, when the power supply is activated when the detonation control module (120) is fired, the second main controller unit provided inside can be operated to perform device initialization for the clock, timer, interrupt module, etc. of the detonation control module (120), and can wait for the reception of a detonation control signal by communicating with the signal processing module (130) through the input / output port, and after operation, when the pre-set detonation charging time has elapsed, it can output a detonation charging signal (i.e., Deto Charge signal) and provide corresponding detonation status information to the signal processing module (130).

[0049] Here, when the detonation control module (120) performs device initialization, it performs initialization of the shock switch, backup sensor, etc., and in the case of a sensor where an active signal is detected, it may wait while ignoring the input signal until a detonation control signal is provided from the signal processing module (130) to prevent premature detonation.

[0050] And, after the detonation control module (120) checks the initial state of the shock switch provided inside, it can detonate the fuse by outputting a detonation output signal to detonate the fuse according to the detonation control signal provided by the signal processing module (130). In the proximity fuse mode and the time fuse mode, the fuse can be detonated by outputting a detonation output signal according to the detonation control signal provided by the signal processing module (130).

[0051] Here, the detonation control module (120) can output a detonation output signal after a preset waiting time (e.g., 1 second) has elapsed when a detonation control signal is provided in proximity fuse mode.

[0052] Additionally, the detonation control module (120) can output a detonation output signal when a shock signal is input through a shock switch after a detonation control signal is provided from the signal processing module (130) in the shock fuse mode, and can detonate the fuse by outputting a detonation output signal when a pre-set shock delay time has elapsed after a detonation control signal is provided from the signal processing module (130) and a shock signal is input through a shock switch in the shock delay fuse mode.

[0053]

[0054] The signal processing module (130) is a module that controls components such as the fuse function loading module (110), the detonation control module (120), and the RF module (140). It can provide the detonation control signal corresponding to any one of the operating modes of the proximity fuse mode, the time fuse mode, the impact fuse mode, and the impact delay fuse mode according to the loading information provided by the fuse function loading module (110). In the proximity fuse mode, it provides a sensing control signal to sense proximity to a target, then provides a detonation control signal according to a calculated value corresponding to the provided distance detection signal, and can provide a detonation control signal in any one of the operating modes of the time fuse mode, the impact fuse mode, and the impact delay fuse mode.

[0055] This signal processing module (130) can be operated by activating the power supply when firing a projectile equipped with a multi-functional fuse device according to one embodiment of the present invention, and in the case of a proximity fuse mode, when the pre-set detonation altitude is reached through a proximity detection signal, a detonation control signal can be provided to the detonation control module (120).

[0056] In addition, the signal processing module (120) can provide a detonation control signal to the detonation control module (120) when a pre-set time limit for the fuse has elapsed in the case of the time fuse mode.

[0057] For example, when the power supply is activated when the bullet is fired, the signal processing module (120) performs device initialization for the system clock, timer, communication module, ADC module, interrupt module, etc. in the third main controller unit provided inside, then performs PLL signal initialization and modulation setting (e.g., triangular wave modulation setting, etc.) for the RF module (140), and communicates with the fuse function loading module (110) to receive loading information corresponding to the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode, and then parses (i.e., interprets data) this loading information to obtain loading information corresponding to the time fuse mode, impact fuse mode, and impact delay fuse mode.

[0058] Additionally, the signal processing module (120) communicates with the detonation control module (120) to request the transmission of detonation status information, and when the detonation status information is received from the detonation control module (120), the detonation status information can be parsed (i.e., data analysis) to obtain detonation status information for detonating the fuse.

[0059] Next, the signal processing module (120) may provide a detonation control signal corresponding to any one of the time fuse mode, impact fuse mode, and impact delay fuse mode according to the loading information and detonation status information to the detonation control module (120). In the proximity fuse mode, after providing a sensing control signal to sense the distance to the target, the detonation control signal is provided according to the calculated value calculated through FFT conversion of the proximity detection signal that measured the distance to the target, and the sensing control signal is provided to the RF module (140) in a PLL manner to perform FMCW modulation. The proximity detection signal (i.e., IF signal) transmitted from the RF module (140) is sampled, and after checking whether the current altitude value obtained through signal processing including FFT conversion, threshold calculation, effective altitude detection, and altitude filter application is a preset detonation altitude, if the current altitude value is a preset detonation altitude, a detonation control signal is generated and provided to the detonation control module (120).

[0060] To explain in detail the process of determining the detonation altitude of the signal processing module (130), the RF signal received by the RF module (140) from the conventional proximity sensor has a frequency approach deviation due to the Doppler effect caused by the difference in the velocity of the projectile (i.e., the relative velocity between the fuse antenna (141) and the stationary terrain feature). However, in the case of the RF module (140) equipped with an FMCW proximity sensor, this Doppler effect is removed, and an IF signal (i.e., proximity detection signal) with relative velocity information removed is received, and the current altitude value can be calculated by detecting the beat frequency from it.

[0061] For example, Fig. 3 shows the FMCW modulation waveform in the presence of the Doppler effect, and Fig. 4 shows the IF signal sampling interval. When approaching, the Doppler frequency increases by Fd, and when moving away, it decreases by Fd. In FMCW proximity sensors, where it is important to accurately detect the detonation altitude set prior to firing and detonate it rather than the projectile's velocity, the Doppler effect (i.e., frequency shift) must be eliminated or minimized. To this end, in the case of a linear FMCW signal with constant frequency increase and decrease (i.e., appearing as a sawtooth wave on the frequency graph), the beat frequency (R) with the Doppler effect removed is calculated using Equation 1 below. t The relationship between ) and elevation can be calculated. Here, t represents the value in a specific time domain.

[0062]

[0063] In the above mathematical formula 1, BW represents the bandwidth (frequency width) of the sensor transmission wave, and T m ε represents the modulation width (frequency change time), F_up represents the frequency increase of the RF reflected signal when approaching the target (or terrain), F-dn represents the frequency decrease of the RF reflected signal when moving away from the target (or terrain), C represents the propagation speed (speed of light), and R is the beat frequency R with the Doppler effect removed from Rx (red line) in Fig. 4. t Represents the IF frequency value indicated by the dotted line.

[0064] Here, the Rt (beat frequency) value is the Y-axis value of the section indicated by the dotted line in Fig. 4. Since the reflected waves received after transmission from the proximity sensor generally consist of many approach waves, the beat frequency with the Doppler effect removed can be the Y-axis value of the red dotted line on the graph in Fig. 4, and if discrete signal conversion is not performed, this value can be converted into an altitude value corresponding to the BW value of the RF signal.

[0065] Meanwhile, in order to obtain the R value representing the beat frequency in the above mathematical formula 1, it is first necessary to determine the section for effectively sampling the IF signal. As shown in FIG. 3, the IF signal can be sampled in the remaining linear section, excluding the sections at the beginning and end of the rising and falling sections where linear changes do not occur in the rising and falling sections of the frequency.

[0066] Furthermore, general frequency modulation is based on a sawtooth modulation section in which the rising and falling of the modulation section are repeated linearly; however, in one embodiment of the present invention, as illustrated in FIG. 4, a linear rising and falling frequency modulation method without a flat section can be applied, and accordingly, the rising section time and the falling section time are each T, which is half of the modulation period. m It can be / 2, and from this, the sampling frequency and points can be determined.

[0067] Next, a Fast Fourier Transform (FFT) is performed to detect the beat frequency from the sampled IF signal, thereby converting the IF sampling data in the time domain into real data in the frequency domain (i.e., the discrete-time signal X(k)). The continuous-time IF signal is then [translated] by the modulation width (sampling period) T m A signal sampled at intervals is the discrete signal time, and a Fast Fourier Transform can be performed to obtain it.

[0068] Here, the Fourier transform is based on the premise that values ​​outside the range where the spectrum is not significantly affected during the integration process are cut off for practical processing of infinite signals. However, since spectral leakage can occur if there is abrupt cutting, a smooth data window ω(n) can be applied to reduce this.

[0069] For example, a Hanning window function (Hann window or Raised cosine) as shown in Equation 2 below can be applied to IF sampling data in the time domain.

[0070]

[0071] The Hanning window function as shown in Equation 2 above can effectively reduce the waves appearing in the spectrum by reducing spectral leakage.

[0072] With reference to FIGS. 5 and 6, the application process of the Hanning window function described above can be explained as follows: The Fast Fourier Transform (FFT) can convert x(k), which is N time-domain sampling data in one real-domain channel, into X(k), which is input data in the frequency domain, as shown in Equation 3 below.

[0073]

[0074] Here, FIG. 6 shows a spectrum waveform obtained by performing a real Fast Fourier Transform (real FFT) on frequency domain sampling data to which a Hanning window function is applied as in FIG. 5. Since the input data is a real part 1 channel, the real part Fast Fourier Transform is performed according to Equation 3 above, and the spectrum waveform can be obtained by calculating the magnitude from it.

[0075] Through the Fast Fourier Transform process described above, a beat frequency signal of valid magnitude according to the spectrum waveform can be detected from the IF-sampled signal, and from this, the distance difference between the transmitted and received signals can be calculated to obtain an instantaneous altitude value in which speed information is not removed.

[0076] And, beat frequency (R r When applied to the above mathematical formula 1 to obtain ), it can be expressed as the following mathematical formula 4. Here, r represents a real value in the discrete-time domain.

[0077]

[0078] Through a process such as the constant, instantaneous altitude values ​​can be obtained that can be processed very quickly and simply on the fuse's small processor.

[0079] Next, it is necessary to extract effective altitude values ​​suitable for the projectile's actual combat environment by filtering out unwanted detection error information from the acquired instantaneous altitude values. To logically determine the validity of the instantaneous altitude values ​​acquired at the beat frequency through cumulative comparison, they can be sequentially stored using a threshold concept.

[0080] For example, as described above, the maximum peak value for each section of the spectrum waveform in which there was no signal satisfying the detonation altitude during a preset unit time (U) of one block in the acquired spectrum waveform can be stored as the threshold value of that block. The threshold value can be calculated by setting the unit time, adjusted according to the projectile velocity, firing angle, projectile rotation amount, etc., as one block, and as shown in FIG. 7, the unit time can be set to 1 second, and the spectrum waveforms during that 1 second can be accumulated and the maximum value among them determined as the threshold value. Accordingly, the ability to respond to instantaneous obstacles (e.g., valley terrain, mast of an adjacent ship, nearby flying object, etc.) can be greatly improved.

[0081] In addition, when a projectile is flying stably at a high altitude, the signal detected by the FMCW proximity sensor may not show an effective altitude signal and may show noise waveforms from the signal processing process. Therefore, to secure a stable threshold level, the spectrum waveform over a unit of time (e.g., 1 second) can be accumulated to detect the maximum value. This can perform the same function as the Maxhold (max value) of a spectrum analyzer, and the accumulated spectrum can be determined as a threshold value by setting the lower section to +5dB and the higher section to +3dB based on, for example, the target detonation altitude (i.e., relative altitude with the target point terrain: HOB) + 2m.

[0082] Meanwhile, Figure 7 illustrates a threshold value waveform when detecting an effective altitude. In order to distinguish between valid altitude information and noise in an instantaneous altitude value containing unwanted sudden changes (noise) obtained through signal processing as described above, the instantaneous sudden changes that occur unintentionally due to external factors can be effectively filtered from the beat frequency (i.e., the instantaneous altitude value before conversion) obtained through the spectrum waveform.

[0083] For example, as shown in FIG. 7, a threshold value is calculated with every 1 second as a block, and when detecting altitude at the nth time point, the threshold value obtained in the interval between n-2 seconds and n-1 seconds is compared with the current spectrum waveform, and the maximum value among the peak values ​​above the threshold value (i.e., maximum peak value) can be determined and stored as a bit frequency value for converting effective altitude values ​​per interval (block).

[0084] In other words, the spectrum waveform from a previous time when there is no detonation altitude (mission altitude) signal can be stored as a threshold value (operational limit value) and compared with the current spectrum waveform. For a projectile flying at an altitude of 20m, if the altitude signal processed during the previous 1 second does not fall within the detonation altitude range of 7-9m, the current altitude is continuously considered to be the previous threshold value of 20m. In this case, mis-detonation signals caused by momentary obstacles on the ground (or momentary waves at sea) detected between 9-20m during the terminal guidance phase of a projectile flying low horizontally can be effectively filtered.

[0085] Here, as shown in FIG. 7, the pre-set interval (one block) is set to 1 second, but this can be appropriately adjusted as needed, and the adjustment criteria may include the bullet velocity, descent angle (a factor affecting the rate of change of altitude), average flight altitude of the projectile (probability of noise generation at maximum peak value), and the amount of rotation of the projectile body (phase difference of transmitted and received radio waves).

[0086] Meanwhile, in a multi-functional fuse device according to one embodiment of the present invention, a process of excluding noise altitude values ​​that deviate from the expected trend can be additionally performed during the process of determining whether the current altitude value is a preset detonation altitude, in order to reflect the characteristic that the altitude of the projectile is physically difficult to change rapidly during actual flight and changes according to the trend of the terrain.

[0087] To this end, a Kalman filter as shown in Equation 5 below can be additionally applied to the altitude values ​​of each section determined to be the maximum peak value above the threshold value.

[0088]

[0089] The Kalman filter shown in Equation 5 above is intended to reflect the dynamics of the target data and to reflect the prediction and measurement noise as a normal distribution. It tracks the optimal value through iterative calculations, and as a recursive filter that tracks the state of a linear dynamic system containing noise, it can be based on measurements taken over time.

[0090] It can be seen that the value obtained through the Kalman filter as shown in Equation 5 above is calculated by adding the value obtained by multiplying the current measurement value by the standard deviation coefficient and the value obtained by multiplying the three filtered values ​​from the previous step by their respective standard deviation coefficients. It is most desirable to determine the standard deviation coefficient of the Kalman filter primarily by considering the rate of change in altitude according to the falling speed, and the number of input data can be appropriately adjusted according to the bullet velocity, descent angle, average flight altitude of the bullet (noise generation rate), and the amount of rotation of the bullet body (phase difference of transmitted and received radio waves), which have a significant influence on the rate of change in altitude, just as in the previous step of comparing altitude values ​​by section.

[0091] After performing filtering using a Kalman filter as described above, the maximum peak value can be determined as the current effective beat frequency value by comparing the calculated current spectrum waveform with the calculated threshold values, and this can be converted into a filtered effective altitude value (i.e., current altitude value).

[0092] That is, the filtered effective altitude value can be obtained from a total of four data points: the previous three filtered effective altitude values ​​and the current effective altitude value. A comparison of the maximum value of three samples and the standard deviation of four samples can be applied in a double manner. As the number of input data increases, the change in the filtered effective altitude may become less sensitive, and as the number of input data decreases, it may exhibit a characteristic of becoming more sensitive.

[0093] Meanwhile, Figure 8 shows the filtered effective altitude, where the blue graph represents the altitude value detected through the FMCW signal processing and the red graph represents the effective altitude value after passing through the Kalman filter, and it can be seen that when an outlier appears in the detected altitude, the filtered effective altitude shows an improved result.

[0094] When a current altitude value (i.e., a filtered effective altitude value) is obtained through the signal processing process described above, the signal processing module (130) can compare and check the obtained current altitude value with a preset detonation altitude, and if the current altitude value becomes the preset detonation altitude, generate a detonation control signal and provide it to the detonation control module (120).

[0095] Meanwhile, the signal processing module (130) does not perform the process of determining the detonation altitude in the time fuse mode, but measures the time through a timer provided internally, and when the pre-set time limit elapses, it can generate a detonation control signal and provide it to the detonation control module (120).

[0096] Additionally, the signal processing module (130) can generate a detonation control signal so that when a shock signal is input through the shock switch according to the charging information provided by the shock fuse function charging module (110) in the shock fuse mode and shock delay fuse mode, it is detonated immediately or after a preset shock delay time has elapsed, and provide this signal to the detonation control module (120) along with the charging information corresponding to the shock fuse mode and shock delay fuse mode.

[0097]

[0098] The RF module (140) is a module that provides a proximity detection signal that measures the distance to a target according to a sensing control signal provided by the signal processing module (130), and is operated by activating the power supply when firing a projectile equipped with a multi-functional fuse device according to one embodiment of the present invention, and may include, for example, a fuse antenna (141), an FMCW (frequency modulated continuous wave) proximity sensor, etc.

[0099] Here, the FMCW (Frequency Modulated Continuous Wave) proximity sensor can measure the frequency difference between the radio waves transmitted from the fuse antenna (141) and the radio waves reflected from the terrain and received, thereby measuring the relative distance and relative speed between the sensor and the reflective object. For example, the FMCW proximity sensor can be activated 3.4 seconds before the preset flight time (i.e., flight time minus 3.4 seconds).

[0100] This RF module (140) can transmit and receive radio waves in an FMCW manner through a fuse antenna (141) based on an FMCW proximity sensor and provide a proximity detection signal to a signal processing module (130) to detect the relative altitude with respect to a target or terrain at the time of reception. It can obtain a real-time detection value (i.e., proximity detection signal) that reflects the influence of terrain features that suddenly appear on the flight path in a digital signal form capable of high-speed processing.

[0101] For example, the RF module (140) can transmit an RF signal in the form of a continuous wave (CW) by linearly frequency modulating (FM) the RF signal to the desired bandwidth through the fuse antenna (141), and can receive an RF signal reflected back from a target or terrain through the fuse antenna (141).

[0102] Here, since the received RF signal experiences a time delay equal to the round-trip distance to the reflective surface compared to the transmission, a frequency difference proportional to the distance appears. By demodulating this back into the original signal, an IF signal (intermediate frequency) containing distance information to the reflective surface (target or terrain) can be obtained.

[0103] The proximity detection signal obtained in the manner described above can be provided to a signal processing module (130) for signal processing to obtain a current altitude value.

[0104]

[0105] Accordingly, according to one embodiment of the present invention, a signal processing module provides a detonation control signal in accordance with loading information provided by a fuse function loading module, and the detonation control module outputs a detonation signal corresponding to any one of the operating modes of a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode in accordance with the detonation control signal. In the proximity fuse mode, a sensing control signal for sensing the distance to a target is provided, and a detonation signal is provided in accordance with a proximity detection signal that measures the distance to the target, and a detonation signal corresponding to any one of the operating modes of a time fuse mode, an impact fuse mode, and an impact delay fuse mode is provided. By allowing the fuse function to be selectively operated according to the usage environment of the ammunition, the efficiency of operations and logistics support can be maximized.

[0106]

[0107] FIG. 9 is a flowchart illustrating the process of operating a multi-functional fuse according to another embodiment of the present invention, and FIGS. 10 to 13 are flowcharts illustrating the process of operating a multi-functional fuse according to fuse functions according to another embodiment of the present invention. Here, since the specific details performed in another embodiment of the present invention have been specifically described in one embodiment of the present invention, the process will be described in a general manner below.

[0108]

[0109] Referring to FIGS. 9 to 13, when a bullet equipped with a multi-functional fuse is fired (step 210), the power supply of the multi-functional fuse device is activated to operate the fuse function loading module (110), detonation control module (120), signal processing module (130), and RF module (140) (step 220).

[0110]

[0111] And, the signal processing module (130) can obtain loading information corresponding to at least one operating mode among proximity fuse mode, time fuse mode, impact fuse mode and impact delay fuse mode from the fuse function loading module (110) (step 230).

[0112] For example, the fuse function loading module (110) stores loading information corresponding to the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode (e.g., detonation altitude for proximity detonation, time limit time (self-detonation time) for time limit detonation, whether to detonate impact for impact detonation, impact delay time for impact delay detonation, etc.), and these can be extracted from the operating state of the module and provided to the signal processing module (130) through the input / output port.

[0113]

[0114] In addition, the signal processing module (130) can obtain detonation status information from the detonation control module (120) (step 240).

[0115] For example, when power supply is activated in the detonation control module (120), a second main controller unit provided inside can be operated to perform device initialization for the clock, timer, interrupt module, etc. of the detonation control module (120), and can wait for the reception of a detonation control signal by communicating with the signal processing module (130) through the input / output port, and after operation, when the pre-set detonation charging time has elapsed, it can output a detonation charging signal and provide corresponding detonation status information to the signal processing module (130).

[0116]

[0117] Next, the signal processing module (130) can check which operating mode of the fuse is the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode according to the loading information and detonation status information (step 250).

[0118]

[0119] As a result of the check in step (250) above, a detonation control signal corresponding to any one of the operating modes of proximity fuse mode, time fuse mode, impact fuse mode and impact delay fuse mode can be provided to the detonation control module (120) (step 260).

[0120] In the step (260) of providing the above detonation control signal to the detonation control module (120), in the case of the proximity fuse mode, the signal processing module (130) provides a sensing control signal to the RF module (140) for sensing the distance to the target, and then provides the detonation control signal according to the proximity detection signal that measures the distance to the target provided from the RF module (140).

[0121] And, in the step (260) of providing the above detonation control signal to the detonation control module (120), in the case of the time fuse mode, the signal processing module (130) can provide the detonation control signal when the time fuse is freed up to a preset time.

[0122] Additionally, in the case of the impact fuse mode and impact delay fuse mode, the signal processing module (130) can generate a detonation control signal so that when an impact signal is input through the impact switch according to the loading information provided by the fuse function loading module (110), it is detonated immediately or after a preset impact delay time has elapsed, and provide this signal to the detonation control module (120) along with the loading information corresponding to the impact fuse mode and impact delay fuse mode.

[0123]

[0124] Next, the detonator can be detonated in accordance with the detonation control signal provided from the signal processing module (130) in the detonation control module (120) (step 270).

[0125] In the step (270) of detonating the above fuse, in the case of an impact fuse mode or an impact delay fuse mode, the fuse can be detonated by sensing a collision with a target through an impact switch according to the detonation control signal provided from the signal processing module (130) in the detonation control module (120).

[0126] Here, in the case of the impact fuse mode, if the charging information (e.g., impact delay time, etc.) is not received from the signal processing module (130), the detonation control module (120) outputs a detonation air signal when an impact signal is input through the impact switch so that the fuse can be detonated immediately.

[0127] Additionally, in the case of the impact delay fuse mode, when the detonation control module (120) receives loading information (e.g., impact delay time, etc.) from the signal processing module (130), an impact signal is input through the impact sensor, and after the impact delay time has elapsed, an detonation air signal is output so that the fuse can be detonated.

[0128]

[0129] Referring to FIG. 10, the proximity fuse mode is briefly explained step by step. If, as a result of the check in step (250), the operating mode is the proximity fuse mode, the signal processing module (130) can provide a sensing control signal to the RF module (140) to sense the distance to the target (step 261a).

[0130] And, the RF module (140) can transmit and receive radio waves in an FMCW manner through the fuse antenna (141) based on the FMCW proximity sensor according to the sensing control signal provided from the signal processing module (130), and provide a proximity detection signal to the signal processing module (130) to detect the distance to the target at the time of reception (step 262a).

[0131] Next, the signal processing module (130) can sample the proximity detection signal (i.e., IF signal) transmitted from the RF module (140) and perform signal processing including FFT transformation, threshold calculation, effective altitude detection, and altitude filter application (step 263a).

[0132] And, the signal processing module (130) can check whether the current altitude value obtained through the signal processing of step (263a) is a preset detonation altitude (step 264a).

[0133] As a result of the check in step (264a), if the current altitude value is a preset detonation altitude, a detonation control signal corresponding to the proximity fuse mode can be generated and provided to the detonation control module (120) (step 265a). Of course, if the current altitude value is not a preset detonation altitude, steps 262a through 264a can be repeated.

[0134] Next, the detonation control module (120) can detonate the fuse by outputting a detonation output signal to detonate the fuse according to the detonation control signal provided by the signal processing module (130) (step 270a).

[0135]

[0136] Referring to FIG. 11, the time fuse mode is briefly explained step by step. If the operating mode is the proximity fuse mode as a result of the check in step (250), the signal processing module (130) can check whether a preset time limit (self-destruct time) has elapsed since the power supply was activated through an internal timer (step 261b).

[0137] As a result of the check in step (261b), if the pre-set time limit (self-destruct time) has not elapsed, it can wait, and if the pre-set time limit (self-destruct time) has elapsed, the signal processing module (130) can provide a detonation control signal corresponding to the time fuse mode to the detonation control module (120) (step 262b).

[0138] Next, the detonation control module (120) can detonate the fuse by outputting a detonation output signal to detonate the fuse according to the detonation control signal provided by the signal processing module (130) (step 270b).

[0139]

[0140] Referring to FIG. 12, the impact fuse mode is briefly explained step by step. If, as a result of the check in step (250), the operating mode is the impact fuse mode, the signal processing module (130) can provide a detonation control signal corresponding to the impact fuse mode to the detonation control module (120) (step 260c).

[0141] And, in the detonation control module (120), if the charging information (e.g., impact delay time, etc.) is not received along with the detonation control signal provided by the signal processing module (130) in the operating state after the initialization of the impact switch, it can check whether an impact is detected through the impact switch (step 271c).

[0142] As a result of the check in step (271c), if an impact is detected through the impact switch, the detonation control module (120) can detonate the fuse by outputting a detonation output signal corresponding to the impact fuse mode (step 272c).

[0143]

[0144] Referring to FIG. 13, the impact fuse mode is briefly explained step by step. If, as a result of the check in step (250), the operating mode is the impact delay fuse mode, the signal processing module (130) can provide a detonation control signal corresponding to the impact delay fuse mode to the detonation control module (120) (step 260d).

[0145] And, in the detonation control module (120), when the detonation control signal provided by the signal processing module (130) is received in the operating state after the initialization of the shock switch, the detonation information (e.g., shock delay time, etc.) can be checked to see if a shock is detected through the shock switch (step 271d).

[0146] As a result of the check in step (271d), if an impact is detected through the impact switch, the detonation control module (120) can check whether a preset impact delay time has elapsed since the impact was detected through an internal timer (step 272d).

[0147] As a result of the check in step (272d), if the preset impact delay time has not elapsed, it can wait, and if the preset impact delay time has elapsed, the detonation control module (120) can detonate the fuse by outputting a detonation output signal corresponding to the impact fuse mode to detonate the fuse (step 273d).

[0148]

[0149] Accordingly, according to another embodiment of the present invention, a signal processing module provides a detonation control signal in accordance with loading information provided by a fuse function loading module, and the detonation control module outputs a detonation signal corresponding to any one of the operating modes of a proximity fuse mode, a time fuse mode, an impact fuse mode, and an impact delay fuse mode in accordance with the detonation control signal. In the proximity fuse mode, a sensing control signal for sensing the distance to a target is provided, and a detonation signal is provided in accordance with a proximity detection signal that measures the distance to the target, and a detonation signal corresponding to any one of the operating modes of a time fuse mode, an impact fuse mode, and an impact delay fuse mode is provided. By allowing the fuse function to be selectively operated according to the usage environment of the ammunition, the efficiency of operations and logistics support can be maximized.

[0150]

[0151] Although various embodiments of the present invention have been presented and described in the above description, the present invention is not necessarily limited thereto, and those skilled in the art will readily understand that various substitutions, modifications, and changes are possible within the scope of the technical concept of the present invention.

[0152]

[0153] [Explanation of the symbol]

[0154] 110 : Fuse Function Loading Module

[0155] 120 : Detonation control module

[0156] 130 : Signal processing module

[0157] 140 : RF module

Claims

1. A fuse function loading module that provides loading information corresponding to at least one operating mode among proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode; A detonation control module that detonates a fuse according to a detonation control signal; A signal processing module that provides a detonation control signal corresponding to any one of the operating modes of the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode according to the loading information provided from the fuse function loading module, wherein, in the proximity fuse mode, a sensing control signal for sensing the distance to a target is provided, and then the detonation control signal is provided according to a calculated value corresponding to the provided distance detection signal, and in any one of the operating modes of the time fuse mode, impact fuse mode, and impact delay fuse mode, the detonation control signal is provided; and An RF module that provides a proximity detection signal that measures the distance to the target according to the sensing control signal provided by the signal processing module; A multifunctional fuse including 2. In Claim 1, The above-mentioned multi-functional fuse is, When a projectile equipped with the above-mentioned multi-functional fuse is fired, the power supply is activated, and the fuse function loading module, detonation control module, signal processing module, and RF module operate, wherein the fuse function loading module transmits the loading information to the signal processing module, the detonation control module transmits detonation status information to the signal processing module, and the signal processing module checks the operating status of the fuse function and fuse components. Multifunctional fuse.

3. In Claim 2, The above signal processing module is, In the case of the above proximity fuse mode, if the calculated value obtained by FFT-converting the proximity sensing signal to calculate the distance becomes a preset detonation altitude, the detonation control signal is provided to the detonation control module. Multifunctional fuse.

4. In Claim 3, The above signal processing module is, In the case of the above time fuse mode, when a preset time for the fuse has elapsed, the detonation control signal is provided to the detonation control module. Multifunctional fuse.

5. In Claim 4, The above detonation control module is, In the case of the above impact fuse mode or impact delay fuse mode, a collision with the target is sensed through the impact switch according to the detonation control signal, and the fuse is detonated depending on whether there is an impact delay time. Multifunctional fuse.

6. A step in which the power supply is activated upon firing of a projectile equipped with a multi-functional fuse to operate the fuse function loading module, detonation control module, signal processing module, and RF module; A step of obtaining loading information corresponding to at least one operating mode among proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode from the fuse function loading module in the signal processing module; A step of obtaining detonation state information from the detonation control module in the signal processing module; A step of providing a detonation control signal corresponding to any one of the operation modes of the proximity fuse mode, time fuse mode, impact fuse mode, and impact delay fuse mode to the detonation control module according to the loading information and detonation state information in the signal processing module; and A step of detonating a fuse in accordance with the detonation control signal provided from the signal processing module in the detonation control module; A method of operating a multi-functional fuse device including 7. In Claim 6, The step of providing the above detonation control signal to the detonation control module is: In the case of the above proximity fuse mode, the signal processing module provides a sensing control signal to the RF module to sense the distance to the target, and then, when the calculated value obtained by receiving the proximity detection signal measuring the distance to the target from the RF module and performing an FFT transformation becomes a preset detonation altitude, the detonation control signal is provided. Method of operating a multi-functional fuse.

8. In Claim 7, The step of providing the above detonation control signal to the detonation control module is: In the case of the above time fuse mode, the signal processing module provides the detonation control signal when a preset time for the fuse has elapsed. Method of operating a multi-functional fuse.

9. In Claim 8, The step of detonating the above fuse is, In the case of the above impact fuse mode or impact delay fuse mode, the detonation control module senses a collision with the target through the impact switch according to the detonation control signal, and detonates the fuse depending on whether there is an impact delay time. Method of operating a multi-functional fuse.

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