Solid-state radar device, solid-state radar control method, and solid-state radar control program product

Abstract

The present invention provides a solid-state radar device, a solid-state radar control method, and a solid-state radar control program product, which can be used for both wave observation and monitoring. The solid-state radar device (101) includes: a transceiver (10) for transmitting and receiving radio wave signals including a modulated signal and a non-modulated signal, wherein the modulated signal and the non-modulated signal are pulse signals having different frequencies; a frequency filter (20) for extracting the modulated signal and the non-modulated signal from the received radio wave signal based on the frequency; a pulse compression unit (30) for generating a pulse compression signal obtained by pulse compressing the modulated signal; a first echo image generation unit (40) for generating a first echo image based on the non-modulated signal and the pulse compression signal; a wave analysis unit (50) for calculating an analysis result of wave information based on either the non-modulated signal or the pulse compression signal; and a display signal generation unit (60) for generating a display signal of the first echo image and the analysis result.

Description

Technical Field

[0001] The present invention relates to a solid-state radar device, a solid-state radar control method and a solid-state radar control program product. Background Art

[0002] Conventionally, magnetron radars, which use magnetron elements as transmitting elements, have been the mainstream of ship radars used to monitor the surroundings of a ship.

[0003] Solid-state radars, which have been developed more recently than magnetron radars, use semiconductors for their transmitting elements, offering advantages such as narrow bandwidth, miniaturization, and maintenance-free operation. However, due to the characteristics of the transmitting element, the peak power of solid-state radars is significantly lower than that of magnetron radars. Therefore, to observe distant targets, solid-state radars must transmit frequency-modulated pulsed signals (chirped pulse signals) and compress the reflected waves from the target to improve the signal-to-noise ratio (S / N).

[0004] In addition to monitoring the ship's surroundings, marine radar is also used to observe waves around the ship itself. This wave observation function is called a wave radar. Wave radar analyzes the reflected waves of the transmitted signal returning from the sea surface around the ship and outputs wave information such as wave height, period, wavelength, and direction. Furthermore, wave radars are currently being developed using magnetron radars.

[0005] [Prior art literature]

[0006] [Patent Document]

[0007] Patent Document 1: WO2017-179344

[0008] Patent Document 2: WO2014-125958 Summary of the Invention

[0009] [Problems to be solved by the invention]

[0010] When monitoring distant locations, magnetron radars use an unmodulated signal (long pulse) with a long pulse width for long-range observation. On the other hand, when observing waves near the vessel itself, the transmitted signal is often set to an unmodulated signal (short pulse or medium pulse) with a short pulse width for short- to medium-range observations in order to achieve sufficient resolution for short-wavelength waves. Therefore, when using short or medium pulses for transmission to simultaneously monitor waves and the surrounding area, magnetron radars cannot observe distant targets, hindering their full use for surrounding monitoring.

[0011] For the above reasons, a user who performs perimeter monitoring including remote locations during wave observation needs to have separate radars for wave observation and radars for target observation.

[0012] The present invention is made to overcome the above-mentioned problems and provides a solid-state radar device that can simultaneously perform the functions of wave observation and surrounding monitoring including distant areas.

[0013] [Technical means to solve the problem]

[0014] In order to solve the above-mentioned problem, the solid-state radar device of the present invention includes: a transceiver unit, which transmits and receives a radio wave signal including a modulated signal and a non-modulated signal, wherein the modulated signal and the non-modulated signal are pulse signals with different frequencies; a frequency filter unit, which extracts the modulated signal and the non-modulated signal from the received radio wave signal based on the frequency; a pulse compression unit, which generates a pulse compression signal obtained by pulse compressing the modulated signal; a first echo image generation unit, which generates a first echo image based on the non-modulated signal and the pulse compression signal; a wave analysis unit, which calculates an analysis result of the wave information based on either the non-modulated signal or the pulse compression signal; and a display signal generation unit, which generates a display signal of the first echo image and the analysis result.

[0015] Furthermore, the cycle for calculating the analysis results may be longer than the cycle for generating the first echo images in each orientation.

[0016] Furthermore, the transceiver unit may further include a rotating antenna, and the wave analysis unit calculates the analysis result by analyzing the scan image, wherein the scan image includes a first echo image corresponding to one rotation of the antenna.

[0017] Moreover, the first echo image can also be divided into multiple areas corresponding to the distance from the sending position, and the area is composed of an image based on at least one of the non-modulated signal and the pulse compression signal. The wave analysis unit analyzes the area in the area composed of either the non-modulated signal or the pulse compression signal.

[0018] Furthermore, at least one of the regions may include a composite image in which a composition ratio of a non-modulated signal and a pulse compression signal is changed according to a distance from the transmitting and receiving unit.

[0019] Furthermore, the display signal generating unit may generate a display signal for simultaneously displaying the first echo image and the analysis result on the same screen.

[0020] Furthermore, the display signal generating unit may generate a display signal for superimposing at least a portion of information of the analysis result on the first echo image.

[0021] Furthermore, the display signal generating unit may generate a display signal for superimposing an analysis region, which is a range for analyzing the wave information, on the first echo image.

[0022] Furthermore, the system may further include an analysis region input unit configured to accept an input from a user for changing at least one of the number, position, and size of the analysis regions.

[0023] Furthermore, the system may further include a bow direction acquiring unit for calculating the bow direction of the ship, wherein the analysis result includes information on the wave direction, and a display signal generating unit for generating a display signal indicating the wave direction and a relative angle to the bow direction.

[0024] Furthermore, the display signal generating unit may generate a display signal of the wave image based on the analysis result.

[0025] Furthermore, the system may further include a second echo image generator configured to generate a second echo image based on either the non-modulated signal or the pulse compression signal, wherein the wave analyzer calculates the analysis result by analyzing a partial range of the second echo image.

[0026] Furthermore, the transceiver unit may further include a rotating antenna, and the wave analysis unit calculates the analysis result by analyzing the scanning image, wherein the scanning image includes a second echo image corresponding to one rotation of the antenna.

[0027] With this structure, the solid-state radar device can be used for both wave observation and monitoring by transmitting radio wave signals of different frequencies and separating and processing each from the reflected waves.

[0028] According to the present invention, a single solid-state radar device can simultaneously perform the functions of wave observation and remote monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a block diagram showing the overall configuration of a solid-state radar device according to an embodiment of the present invention.

[0030] Figure 2It is a block diagram showing details of a transmission unit according to an embodiment of the present invention.

[0031] Figure 3 It is a block diagram showing the configuration of a frequency filter unit according to an embodiment of the present invention.

[0032] Figure 4 FIG. 1 is a diagram schematically showing an echo image of one scan having partitions consisting of a non-modulated signal and a pulse compression signal.

[0033] Fig. 5(A) is a diagram showing the form of a transmission signal of a magnetron radar. Fig. 5(B) is a diagram showing the form of a transmission signal according to an embodiment of the present invention.

[0034] Figure 6 A diagram showing a flow chart of an embodiment of the present invention.

[0035] Figure 7 FIG. 1 is a diagram schematically showing an echo image of one scan having a partition including a synthesis of a non-modulated signal and a pulse compression signal.

[0036] Figure 8 This is a diagram showing the wave analysis results and echo images displayed on the same screen according to the embodiment of the present invention.

[0037] Figure 9 A diagram showing a modified form of a transmission signal according to an embodiment of the present invention.

[0038] [Explanation of Symbols]

[0039] 10: Transceiver Department

[0040] 11: Antenna

[0041] 12: Circulator

[0042] 13: Sending Department

[0043] 14: Receiving Department

[0044] 20: Frequency filter section

[0045] 21, 22: BPF

[0046] 30: Pulse compression unit

[0047] 40: First echo image generating unit

[0048] 41: Second echo image generation unit

[0049] 50: Wave Analysis Department

[0050] 51: Analysis area input

[0051] 61: Display screen

[0052] 62: Echo image

[0053] 63: Wave information area

[0054] 70: The ship itself

[0055] 71: Analysis area

[0056] 72: Relative angle

[0057] 73: Wave Vector

[0058] 80: Heading acquisition unit

[0059] 101, 102: Solid-state radar device

[0060] S2~S11:Steps DETAILED DESCRIPTION

[0061] A solid-state radar device according to an embodiment of the present invention will be described with reference to the drawings. The solid-state radar device according to this embodiment can be used as a radar for ships such as merchant ships, fishing boats, and pleasure boats.

[0062] <Basic structure and basic movements>

[0063] Hereinafter, the basic structure and basic operation of the present invention will be described. Figure 1 2 is a diagram showing the configuration of a solid-state radar device 101 according to this embodiment.

[0064] Figure 2 This is the structure of the transceiver 10. The transceiver 10 includes an antenna 11, a circulator 12, a transmitter 13, and a receiver 14.

[0065] The transmitter 13 alternately generates a modulated signal (a frequency-modulated pulse signal) and a non-modulated signal (an unmodulated pulse signal) as a transmission signal, and outputs the transmission signal to the circulator 12. At this time, the transmitter 13 generates the modulated signal and the non-modulated signal as transmission signals of different frequencies so that their frequency bands do not overlap. Furthermore, although not shown, the transmitter 13 outputs a portion of the modulated transmission signal to the pulse compression unit 30.

[0066] The circulator 12 transmits a transmission signal from the transmission unit 13 to the antenna 11 , and outputs a reception signal received from the antenna 11 to the reception unit 14 .

[0067] Antenna 11 can be constructed by arranging patch antennas, etc., in a row. It rotates so that its transmission and reception surface faces all directions (360 degrees) parallel to the installation surface of the solid-state radar device 101. While rotating, antenna 11 radiates transmission signals to the outside world in various directions. A portion of the transmitted signal is reflected by reflectors such as the sea surface and offshore objects. Furthermore, antenna 11 receives a portion of the reflected transmission signal as a received signal while rotating.

[0068] The receiving unit 14 performs the following reception processing: detecting the received signal using a double superheterodyne method, amplifying the signal using an amplifier, and converting the analog signal into a digital signal using an analog / digital (A / D) converter.

[0069] Figure 3 This is the structure of the frequency filter unit 20. The frequency filter unit 20 is composed of two band-pass filters (BPF) that separate the modulated signal from the non-modulated signal based on the frequency.

[0070] The received signal, which has undergone reception processing in the receiving unit 14, is output to BPFs 21 and 22, respectively. BPF 21 extracts the lower-frequency signal of the modulated signal or the unmodulated signal, while BPF 22 extracts the higher-frequency signal. The decision of whether BPFs 21 and 22 extract the modulated signal or the unmodulated signal depends on the frequency settings of the modulated and unmodulated signals. Furthermore, the two bandpass filters may also include a low-pass filter (LPF) and a high-pass filter (HPF), as long as they can separate the modulated and unmodulated signals.

[0071] The modulated signal extracted by one of the bandpass filters is output to the pulse compression unit 30 , while the non-modulated signal extracted by the other bandpass filter is output to the first echo image generation unit 40 .

[0072] The pulse compressor 30 converts the modulated signal into a pulse compression signal through pulse compression processing, and outputs the signal to the first echo image generator 40. Here, the pulse compression processing may be a conventionally known processing, such as a matched filter method.

[0073] The first echo image generator 40 generates a swept image as a first echo image based on the sweep data and outputs it to the wave analyzer 50 and the display signal generator 60. The sweep data is signal data in a specific direction generated from an unmodulated signal and a pulse compression signal corresponding to successive transmission pulses. Furthermore, the swept image is an image in which the sweep data based on the unmodulated signal is pixelated from the vessel 70 to a certain distance, while the sweep data based on the pulse compression signal is pixelated at a greater distance, with one pixel in the azimuth direction and a predetermined number of pixels in the range direction.

[0074] The wave analysis unit 50 generates a polar coordinate image based on multiple sweep images, equivalent to a single scan. Furthermore, the wave analysis unit 50 converts the polar coordinate image into a single sweep image, using a Cartesian coordinate system centered on the vessel 70. Here, sweeping refers to the act of rotating the antenna 360 degrees while transmitting and receiving radio wave signals. Radio wave signals are a general term for transmitted or received signals, whether modulated or unmodulated, as well as reflected waves of transmitted signals.

[0075] Next, the wave analysis unit 50 sets an analysis area 71 as a portion of the same pixel size from the range of the area generated by the non-modulated signal or pulse compression signal of a plurality of temporally continuous scanned images. Figure 4 This is an example of setting analysis region 71 within a range containing non-modulated signals within a single sweep image. The intensity information of multiple images corresponding to the position of analysis region 71 is processed in the form of a three-dimensional matrix. Furthermore, the wave analysis unit 50 calculates wave information such as wave height, period, wavelength, and direction based on the results of Fourier transform of this three-dimensional matrix as analysis results, and outputs this information to the display signal generation unit 60. Furthermore, in this embodiment, the cycle for calculating the analysis results is longer than the cycle for generating the swept images.

[0076] The display signal generating unit 60 generates a display signal for a screen including the sweep image and the analysis result of the wave. Furthermore, the solid-state radar device 101 may further include a display unit for displaying the display signal generated by the display signal generating unit 60 .

[0077] Next, the effects of the basic structure will be described.

[0078] Differences in Transmission and Reception Processing Between Magnetron Radar and Solid-State Radar

[0079] The transmitter of a magnetron radar uses a magnetron element, which can transmit pulse signals with higher peak power than the solid-state element of a solid-state radar. However, due to the characteristics of solid-state elements, the peak power of the transmitted signal in a solid-state radar's transmitter is low, making it impossible to transmit pulse signals with the same power as a magnetron radar. Consequently, a solid-state radar cannot maintain a stable detection range with the same pulse width as a magnetron radar. Therefore, the transmitter of a solid-state radar transmits a long, frequency-modulated pulse signal (modulated signal) and applies pulse compression processing during reception to maintain the signal-to-noise ratio and thus the detection range.

[0080] Here, during the transmission of the modulated signal, a portion of the transmitted signal leaks to the receiver 14, making it impossible to receive the reflected wave of the modulated signal during transmission. The modulated signal of a solid-state radar is based on an improved signal-to-noise ratio achieved through pulse compression processing, and is therefore longer than the transmitted signal of a magnetron radar. Therefore, the period during which the modulated signal cannot be received is relatively long, making it impossible to observe targets near the ship. Hereinafter, the range in which the reflected wave of the modulated signal cannot be received is referred to as the null zone. For example, when the pulse width of the modulated signal is approximately 10 μs, the null zone is an area with a radius of approximately 1500 meters from the ship.

[0081] Here, the dead zone is a short distance (70 meters) from the ship itself, and the radio wave signal is relatively unattenuated during its round trip from the transmitter to the target. Therefore, solid-state radars transmit an unmodulated signal with low average power and a short pulse width, and generate an echo image from the dead zone based on the received signal, thereby interpolating the dead zone of the modulated signal.

[0082] As described above, solid-state radar uses both modulated and unmodulated signals when transmitting signals, thereby being able to observe targets from near the ship itself to far away.

[0083] Advantages of this structure

[0084] Magnetron radars have difficulty adjusting the frequency of their transmission signals due to the characteristics of the magnetron element. Solid-state radars, on the other hand, can transmit modulated and unmodulated signals at different frequencies, making it easy to separate the received signals using bandpass filters.

[0085] Here, assuming that a magnetron radar alternates between short and long pulses, it can be used for both wave analysis and perimeter monitoring. More specifically, as shown in Figure 5(A), the magnetron radar analyzes waves based on the short-pulse received signals and generates distant echo images based on the long-pulse received signals.

[0086] Because magnetron radar transmits signals that leak to the receiver, one radar cannot receive the other's signal while the other is transmitting. Therefore, in dual-use magnetron radar configurations, the transmitter must reduce the repetition frequency (PRF) of each transmit pulse to ensure adequate reception time for each transmit pulse. However, this reduction in PRF reduces the azimuth resolution of both short and long pulses, decreasing the number of target hits and thus impairing the ability to detect distant targets.

[0087] Solid-state radars, on the other hand, can easily change the frequency of their transmitted signals, allowing them to continuously transmit modulated and unmodulated signals at different frequencies. Therefore, as shown in Figure 5(B), solid-state radars use a bandpass filter to separate the received signals of modulated and unmodulated signals. This allows them to receive one signal while the other is transmitting, without worrying about leakage of the transmitted signal. Consequently, solid-state radars do not need to reduce the PRF of their transmitted signals.

[0088] In this embodiment, the wave analysis unit 50 calculates the analysis result by analyzing a portion of the image containing the first echo image generated by the first echo image generation unit 40. Therefore, the transmission unit 10 does not need to separately transmit a transmission signal for analyzing waves near the ship itself and a transmission signal for generating a display signal representing an image of the ship's surroundings. Therefore, in this embodiment, when analyzing wave information, the solid-state radar does not need to reduce the PRF of the transmission signal.

[0089] The wave analysis unit 50 analyzes wave information within the region of the first echo image comprised of either the unmodulated signal or the pulse compression signal. By setting the analysis region 71 so that the portions comprising either the unmodulated signal or the pulse compression signal are not repeated, the wave analysis unit 50 can analyze wave information even without generating additional echo images for wave analysis. This is because the unmodulated signal and the pulse compression signal have different pulse properties, and the echo images comprising them also have different properties. Furthermore, by setting the pulse width of the unmodulated signal to a sufficiently short value for wave information analysis, the analysis results of the wave information are highly accurate.

[0090] The flowchart of the embodiment of the present invention is Figure 6 Provide explanation.

[0091] The transceiver 10 generates a modulated and unmodulated transmission signal (step S1). Next, the transceiver 10 performs a transmission process, radiating the generated transmission signal to the outside world via the circulator 12 and the rotating antenna 11 (step S2). Next, the transceiver 10 receives the reflected wave of the transmission signal reflected from a reflector via the antenna 11 and performs a reception process (step S3).

[0092] The frequency filter unit 20 uses a bandpass filter to extract the modulated signal and the non-modulated signal from the received signal (step S4). The frequency filter unit 20 outputs the modulated signal from the received signal to the pulse compressor unit 30 (step S5). If the received signal is not a modulated signal, that is, if it is a non-modulated signal, the frequency filter unit 20 inputs the received signal to the first echo image generator 40 (step S5). The pulse compressor 30 performs pulse compression processing on the modulated signal and outputs it to the first echo image generator 40 (step S6).

[0093] The first echo image generator 40 generates an echo image based on the sweep data of the modulated signal and the unmodulated signal (step S7). Next, if the first echo image is used by the wave analysis unit 50, the first echo image generator 40 outputs the first echo image to the wave analysis unit 50 (step S8). Furthermore, if the first echo image is not used by the wave analysis unit 50, the second echo image generator 41 generates a second echo image and outputs it to the wave analysis unit 50 (step S9).

[0094] The wave analysis unit 50 analyzes wave information based on at least one of the non-modulated signal and the pulse compression signal, and outputs analysis results of the wave such as wave height, period, wavelength, and direction to the display signal generation unit 60 (step S10 ).

[0095] The display signal generating unit 60 generates a display signal for displaying the analysis result of the wave and the first echo image (step S11 ).

[0096] Next, various detailed embodiments will be described.

[0097] <Echo image area>

[0098] When generating the first echo image, the first echo image generating unit 40 may generate the first echo image by dividing the image into a plurality of regions in the distance direction. Figure 4 The area near the ship itself is composed of non-modulated signals, and the area far from the ship itself is composed of pulse compression signals. Furthermore, the wave analysis unit 50 sets an analysis area 71 in the area composed of non-modulated signals near the ship itself within the above area to analyze the wave information.

[0099] Figure 7In the synthesized region, the first echo image generator 40 generates a first echo image comprising a region composed of the non-modulated signal and the pulse compression signal between the regions each composed of the non-modulated signal and the pulse compression signal. This synthesis process reduces the proportion of the region composed of the non-modulated signal as the distance from the transmitter and receiver increases. This results in a seamless first echo image with a subtle seam between the regions composed of the two signals.

[0100] <Display form>

[0101] Figure 8 Display screen 61 displays a vessel's surrounding image 62 based on the first echo image on the left side, and wave height, period, and wave direction information, which is part of the analysis results, in a wave information area 63 on the right side. The surrounding image 62 and the wave information area 63 are displayed simultaneously on the same display screen. Furthermore, display screen 61 displays an analysis area 71 superimposed on the surrounding image 62 based on the first echo image. Furthermore, display screen 61 displays a wave vector 73, which is part of the analysis results, on the surrounding image 62. Furthermore, the display signal generator 60 can generate two display signals, one for displaying the first echo image and the other for displaying the analysis results on two different display screens.

[0102] Figure 9 The solid-state radar device 102 further includes a heading acquisition unit 80 . The heading acquisition unit 80 calculates the ship's heading based on sensor information such as a Global Positioning System (GPS) sensor or a gyrocompass that acquires the ship's position information, and outputs the calculated heading to the display signal generation unit 60 . Figure 8 The display screen 61 is a screen that displays information on the wave direction and the relative angle 72 of the bow of the ship itself as part of the wave analysis results.

[0103] The wave analysis unit 50 may also perform a Fourier transform on the three-dimensional matrix of the analysis region 71. Based on the wave frequencies of the analysis results, filtering is performed to remove non-wave components. Then, an inverse Fourier transform is performed to generate a two-dimensional image that emphasizes wave information compared to normal echoes, serving as a wave image. The wave image is a three-dimensional image that allows viewers to understand wave height, wavelength, and direction at a glance. It is pre-stored along with numerical values of wave information. The wave analysis unit 50 may also extract the stored wave image with wave information values close to the analysis results. Furthermore, the display signal generation unit 60 may generate a display signal that superimposes the wave image on the first echo image.

[0104] User Interface

[0105] like Figure 9 As shown, the solid-state radar device 102 may further include an analysis region input unit 51. The wave analysis unit 50 may change the position, size, and number of analysis regions 71 according to user input.

[0106] Clutter Processing

[0107] Part of the transmission signal sent from antenna 11 is reflected by the sea surface, and part of the reflected wave is received by antenna 11. The intensity of the received reflected wave depends on the angle of incidence on the sea surface, so the intensity is greater when the distance from the transceiver 10 is short. Therefore, wave information is mostly contained in the reflected waves from the vicinity of the ship itself.

[0108] Radar echo images typically undergo some signal processing to more clearly reflect targets such as other ships. One such method is Sensitivity Time Control (STC), a method for suppressing sea surface reflections (sea clutter). STC reduces the gain of strong reflections from close range to suppress the influence of nearby sea surface reflections, thereby creating a uniform image regardless of distance.

[0109] On the other hand, radar echo images used for wave analysis are usually not subjected to STC processing because they analyze the wave information contained in the reflected wave. This is because sea clutter is the analysis target of the wave analysis unit 50 and there is no need to attenuate the wave information.

[0110] Therefore, the first echo image generating unit may generate a first echo image that is not subjected to the same noise suppression process as that for display, and output the generated image to the wave analyzing unit 50 .

[0111] <Generation of echo images for wave analysis>

[0112] Figure 9In the embodiment, the solid-state radar device 102 further includes a second echo image generating unit 41. The second echo image generating unit 41 generates a second echo image for use in the wave analysis unit 50 in place of the first echo image, and outputs the second echo image to the wave analysis unit 50. The second echo image is composed of at least one of an unmodulated signal and a pulse compression signal. Furthermore, the wave analysis unit 50 defines an analysis region 71 within the second echo image, within a region composed of either the unmodulated signal or the pulse compression signal, to analyze the wave information. In this way, the second echo image generating unit 41 can generate a second echo image more suitable for analyzing wave information while using the common received signal that constitutes the first echo image. Furthermore, the second echo image generating unit 41 can perform the same processing as that performed by the first echo image generating unit 40 described herein.

[0113] Here, the second echo image generator 41 can generate the second echo image using only the unmodulated signal. In this case, the entire range of the second echo image is composed of the unmodulated signal, allowing the wave analysis unit 50 to set the analysis region 71 independently of the region typically composed of the pulse compression signal. Consequently, the wave analysis unit 50 can analyze distant wave information within the range reflected by the echo. Furthermore, in this case, the pulse compression unit 30 can be configured not to output a pulse compression signal to the second echo image generator.

[0114] <Transformed Form>

[0115] [Solid-state radar device installation form]

[0116] Solid-state radar devices can also be installed on land as long as the structure meets the requirements.

[0117] [Digital and analog forms]

[0118] The A / D conversion process of the received signal described as the process in the transceiver unit 10 can be performed in any process. Figure 1 Each process of the frequency filter unit 20 and the pulse compression unit 10 may be performed by a central processing unit (CPU), a field programmable gate array (FPGA), or an analog circuit.

[0119] [Patterns of Wave Analysis]

[0120] The wave analysis process is not limited to any method, as long as the analysis results of the wave information can be calculated from the echo image. For example, the wave analysis unit 50 may analyze the correlation of temporally consecutive scanned images or calculate the cross spectrum of these images to analyze the wave information and calculate the analysis results.

[0121] <Explanation of this article>

[0122] [Deformation of the structure]

[0123] The specific structure of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present disclosure.

[0124] [Explanation of the sentence]

[0125] The order of execution of actions, sequences, steps, and stages, etc., in the apparatuses, systems, programs, and methods described in the claims, specifications, and drawings may be performed in any order as long as the output of the preceding process is used for subsequent processing. Even if the phrases "first" or "next" are used for convenience in describing the processes in the claims, specifications, and drawings, this does not necessarily imply that the processes must be executed in that order.

Claims

1. A solid-state radar device, characterized in that: include: a transceiver for transmitting and receiving radio wave signals including a modulated signal and a non-modulated signal, wherein the modulated signal and the non-modulated signal are pulse signals having different frequencies; a frequency filter unit for extracting the modulated signal and the non-modulated signal from the received radio wave signal based on the frequency; a pulse compression unit for generating a pulse compression signal by performing pulse compression on the modulated signal; a first echo image generating unit configured to generate a first echo image based on the non-modulated signal and the pulse compression signal; a wave analysis unit that calculates an analysis result of wave information based on either the non-modulated signal or the pulse compression signal; as well as The display signal generating unit generates a display signal for the first echo image and the analysis result.

2. The solid-state radar device according to claim 1, wherein The period for calculating the analysis result is longer than the period for generating the first echo images in each direction.

3. The solid-state radar device according to claim 1 or 2, characterized in that: The transceiver unit also includes a rotating antenna. The wave analysis unit calculates the analysis result by analyzing a scanning image, where the scanning image includes a first echo image corresponding to one rotation of the antenna.

4. The solid-state radar device according to claim 1 or 2, characterized in that: The first echo image is divided into a plurality of regions corresponding to distances from a transmission position, the regions being composed of images based on at least one of the non-modulated signal and the pulse compression signal. The wave analysis unit analyzes a region of the region that is formed by either the non-modulation signal or the pulse compression signal.

5. The solid-state radar device according to claim 4, characterized in that At least one of the regions is composed of a composite image in which a composition ratio of the non-modulated signal and the pulse compression signal is changed according to distance.

6. The solid-state radar device according to claim 1 or 2, characterized in that: The display signal generating unit generates a display signal for simultaneously displaying the first echo image and the analysis result on the same screen.

7. The solid-state radar device according to claim 1 or 2, characterized in that: The display signal generating unit generates a display signal for superimposing at least a portion of information of the analysis result on the first echo image.

8. The solid-state radar device according to claim 1 or 2, characterized in that: The display signal generating unit generates a display signal for superimposing an analysis region on the first echo image, the analysis region being a range for analyzing the wave information.

9. The solid-state radar device according to claim 8, characterized in that Also includes: The analysis region input unit receives an input from a user for changing at least one of the number, position, and size of the analysis regions.

10. The solid-state radar device according to claim 1 or 2, characterized in that: Also includes: The ship's heading acquisition unit calculates the ship's own heading. The analysis results include information on wave direction, The display signal generating unit generates a display signal indicating the wave direction and a relative angle to the bow bearing.

11. The solid-state radar device according to claim 1 or 2, characterized in that: The display signal generating unit generates a display signal of a wave image based on the analysis result.

12. The solid-state radar device according to claim 1 or 2, characterized in that: Also includes: a second echo image generating unit configured to generate a second echo image based on either the non-modulated signal or the pulse compression signal; The wave analysis unit calculates the analysis result by analyzing a partial range of the second echo image.

13. The solid-state radar device according to claim 12, wherein: The transceiver unit also includes a rotating antenna. The wave analysis unit calculates the analysis result by analyzing a scanning image including a second echo image corresponding to one rotation of the antenna.

14. A solid-state radar control method, characterized in that: Transmitting and receiving radio wave signals including a modulated signal and a non-modulated signal, wherein the modulated signal and the non-modulated signal are pulse signals with different frequencies. extracting the modulated signal and the non-modulated signal from the received radio wave signal based on the frequency, generating a pulse compression signal obtained by pulse compressing the modulated signal, generating a first echo image based on the non-modulated signal and the pulse compression signal, An analysis result of wave information is calculated based on either the non-modulated signal or the pulse compression signal, A display signal of the first echo image and the analysis result is generated.

15. A solid-state radar control program product, comprising a solid-state radar control program, characterized in that: The solid-state radar control program realizes the following functions when executed: The processing of transmitting and receiving radio wave signals including modulated signals and non-modulated signals, wherein the modulated signals and non-modulated signals are pulse signals with different frequencies; Extracting the modulated signal and the non-modulated signal from the received radio wave signal based on the frequency; generating a pulse compression signal by performing pulse compression on the modulated signal; generating a first echo image based on the non-modulated signal and the pulse compression signal; a process of calculating an analysis result of wave information based on either the non-modulated signal or the pulse compression signal; as well as A process of generating the first echo image and a display signal of the analysis result.

Images