Non-linear chirp matched filtering device for radar

Abstract

The utility model discloses a non-linear chirp matched filtering device for radar, which comprises a filter used for accurately extracting and processing radar echoes containing non-linear chirp signals and a cable arranged in an inner cavity of the filter, the left side of the inner cavity of the filter is provided with an assembly slot hole, and the left side of the assembly slot hole is provided with a through hole. An adjusting type take-up assembly is assembled in an inner cavity of the assembling groove hole. The adjustable take-up assembly comprises an adjusting drive plate and a limiting plate used in cooperation with the adjusting drive plate, the adjusting drive plate and the limiting plate are both arranged in an inner cavity of the assembling groove hole, and an adjustable assembling assembly is installed on the surface of the adjusting drive plate. According to the scheme, the device comprising the filter and the adjustable take-up assembly is designed, efficient processing of nonlinear chirp signals is achieved, meanwhile, cable management is optimized, the reliability and maintenance convenience of equipment are improved, and the target detection capacity of a radar system is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to radar technical field especially relates to a nonlinear chirp's matching filter device for radar. BACKGROUND

[0002] With the development of radar technology, nonlinear chirp signals have been widely used due to their advantages in improving radar resolution and anti-jamming capability. However, in practical applications, the processing and extraction of nonlinear chirp signals become a key technical problem, therefore, a matching filter device is needed. Although traditional radar signal filters can complete basic signal processing tasks, the management of connection cables between the filter and the radar system is also a major challenge, especially in compact space layouts, how to effectively organize and protect the cables while ensuring quick installation and disassembly becomes a problem to be solved.

[0003] Some existing solutions, such as Chinese patent "CN202323132174.7 A radar signal filter with optimized structure", propose to add a take-up reel, a coil spring and a limiting structure outside the filter to effectively manage the connection cables. Although this method improves the installation and arrangement of cables to some extent, it also exposes several shortcomings. First, these additional structures occupy a large space, which is particularly disadvantageous in space-limited application scenarios. Second, the main dependence on the reset mechanism of the coil spring may cause performance degradation over time due to spring fatigue, thereby affecting the stability and reliability of the entire device. Finally, the existing solutions do not fully meet the needs of quick installation and disassembly, especially in situations where the cable length needs to be frequently adjusted or equipment components need to be replaced, there are still problems of inconvenient operation. SUMMARY

[0004] The utility model aims at providing a nonlinear chirp's matching filter device for radar to solve the problems in the background art, by designing a device containing a precision filter and an adjustable take-up assembly, efficient processing of nonlinear chirp signals is achieved, cable management is optimized, the reliability and maintenance convenience of the equipment are improved, and the target detection capability of the radar system is enhanced.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a nonlinear chirp's matching filter device for radar, including a filter for accurately extracting and processing radar echoes containing nonlinear chirp signals, and a cable arranged in the inner cavity of the filter, a assembly slot hole is formed on the left side of the inner cavity of the filter, wherein the inner cavity of the assembly slot hole is equipped with an adjustable take-up assembly;

[0006] The adjustable take-up assembly comprises an adjusting dial and a limiting disc used in cooperation with the adjusting dial, wherein the adjusting dial and the limiting disc are arranged in the inner cavity of the assembly slot, and the surface of the adjusting dial is provided with an adjustable assembly assembly.

[0007] Preferably, the bottom of the filter on the left and right sides is connected with a loading plate along the axis, and the front and rear ends of the end of the loading plate are penetrated and connected with fixing bolts.

[0008] Preferably, the bottom of the filter is attached with a heat-conducting column, the end of the loading plate is provided with a heat-conducting paste, and the side of the loading plate is penetrated and connected with a heat-conducting cylinder.

[0009] Preferably, the surface of the adjusting dial is symmetrically provided with a plurality of limiting dial grooves, the center of the surface of the adjusting dial is penetrated and provided with a middle groove cavity, the outer surface of the adjusting dial is sleeved with a protective cover, and the inner cavity of the middle groove cavity is movably sleeved with a fixed sleeve through a bearing.

[0010] Preferably, the surface of the limiting disc is provided with a plurality of straight-line sliding grooves matched with the limiting dial grooves, and the center of the surface of the limiting disc is penetrated and provided with a center groove.

[0011] Preferably, the adjustable assembly assembly comprises a push shaft, wherein the push shaft is slidingly arranged in the inner cavity of the limiting dial groove, and the two shaft ends of the push shaft are connected with sliding disc bodies.

[0012] Preferably, the shaft end of the push shaft is connected with a connecting rod body, and one end of the outer surface of the connecting rod body is sleeved with a limiting sleeve disc.

[0013] Preferably, the end of the push shaft away from the connecting rod body is symmetrically provided with two limiting support columns along the axis, and the other end of the limiting support column is fixedly connected with a limiting disc.

[0014] Preferably, the side wall of the filter and located outside the protective cover is movably provided with an abutting sleeve, one end of the surface of the protective cover is sleeved with an outer gear ring, the inner cavity of the abutting sleeve is provided with a plurality of limiting dial strips, and the limiting dial strips and the outer gear ring are engaged and abutted.

[0015] Preferably, the shaft end of the limiting dial strip is provided with a coil spring, and one end of the surface of the limiting dial strip is connected with a pull rope.

[0016] The radar nonlinear chirp matching filter device has the following advantages:

[0017] The radar uses a matching filter device of a nonlinear chirp, through an adjustable take-up assembly design, greatly simplifies cable management, reduces assembly space requirements, improves assembly efficiency and maintenance convenience. At the same time, the device also has good heat dissipation performance, through a heat dissipation system composed of heat conduction columns, heat conduction pads and heat conduction cylinders, effectively reduces the temperature of the filter during work, prolongs the service life of the equipment; the self-locking mechanism design, that is, through the meshing of the limiting bar on the abutment sleeve and the outer gear ring on the protective cover, prevents the reverse rotation of the adjusting dial, ensures the cable position fixed, ensures the stability and safety of the adjustable take-up assembly in the use process, provides a strong guarantee for the efficient operation of the radar system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation to the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the local structure of the filter of the present application;

[0021] Figure 3 It is a schematic diagram of the internal structure of the protective cover of the present application;

[0022] Figure 4 It is a schematic diagram of the structure of the adjusting dial and the limiting disc of the present application;

[0023] Figure 5 It is a schematic diagram of the cable structure of the present application;

[0024] Figure 6 It is a schematic diagram of the structure of the adjusting dial and the limiting disc of the present application;

[0025] Figure 7 It is a schematic diagram of the local structure of the abutment sleeve of the present application;

[0026] Figure 8 It is a schematic diagram of the adjustable assembly assembly structure of the present application;

[0027] Figure 9 It is a schematic diagram of the adjustable assembly assembly structure of the present application.

[0028] Mark explanation in the figure:

[0029] 100, filter; 101, loading plate; 102, fixing bolt; 103, heat conduction column; 104, heat conduction paste; 105, heat conduction cylinder; 106, assembly slot hole; 200, adjusting dial; 201, limiting dial slot; 202, middle assembly slot cavity; 210, shroud; 300, fixing sleeve; 400, limiting disc; 401, straight line sliding slot; 402, center slot; 500, cable; 500a, extension end connector; 500b, fixed end connector; 600, adjustable assembly assembly; 610, push shaft; 611, sliding disc body; 620, connecting rod body; 621, limiting sleeve disc; 630, limiting support column; 631, limiting support disc; 630a, limiting slot cavity; 700, abutting sleeve; 710, outer gear ring; 720, limiting dial; 730, coil spring; 740, pull rope. DETAILED DESCRIPTION

[0030] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0031] In the description of the embodiments of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "length", "vertical", "horizontal", "top", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can refer to the same reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0035] In order to better understand the purpose, structure and function of the present application, the present application will be further described in detail below in combination with the drawings.

[0036] As shown in the drawings, the present application is a radar nonlinear chirp matching filter device, which comprises a filter 100 for accurately extracting and processing radar echo containing nonlinear chirp signals to improve the resolution and accuracy of target detection, and a cable 500 arranged in the inner cavity of the filter 100 for electrical connection. Wherein, one end of the cable 500 connected with the filter 100 is a fixed end connector 500b, and the other end of the cable 500 connected with the electrical component is a stretching end connector 500a. When connected, the stretching end connector 500a in the cable 500 is pulled out to the appropriate length by the adjustable winding assembly, and then the two can be quickly assembled. Figures 1-9 The left side of the inner cavity of the filter 100 is provided with an assembly slot hole 106; the bottom of the left and right sides of the filter 100 is connected with a loading plate 101 along the axis, wherein the loading plate 101 is integrally cut and processed with the filter 100, and the front and rear ends of the end of the loading plate 101 are connected with fixed bolts 102, wherein the loading plate 101 and the fixed bolts 102 are connected by screw thread, and the filter 100 is fixed at the specified position.

[0037] The bottom of the filter 100 is attached with a heat conduction column 103, which can transfer the heat in the filter 100 outward after the filter 100 is installed at the specified position, and the end of the loading plate 101 is provided with a heat conduction paste 104, wherein the bottom of the heat conduction paste 104 is connected with the end of the heat conduction column 103, so as to assist the heat generated by the heat conduction column 103 to be conducted outward through the heat conduction paste 104, and the side of the loading plate 101 is connected with a heat conduction cylinder 105, wherein the heat absorbing end of the heat conduction cylinder 105 extends to the inner cavity of the filter 100, and the heat exhausting end of the heat conduction cylinder 105 extends to the outside of the loading plate 101.

[0038]

[0039] ​The inner cavity of the assembly slot hole 106 is provided with an adjustable wire winding assembly. The adjustable wire winding assembly is installed in the inner cavity of the assembly slot hole 106, so as to electrically connect the cable 500 and the electrical component. At the same time, the adjustable wire winding assembly can be used to wind and unwind the cable 500, so as to connect the electrical component by using the extension end connector 500a.

[0040] The adjustable wire winding assembly comprises an adjusting dial 200 and a limiting disc 400 used in cooperation with the adjusting dial 200. The adjusting dial 200 and the limiting disc 400 are both arranged in the inner cavity of the assembly slot hole 106. A plurality of limiting dial grooves 201 are symmetrically formed on the surface of the adjusting dial 200. A middle dial groove cavity 202 is formed through the center of the surface of the adjusting dial 200. The middle dial groove cavity 202 and the center groove 402 are both used for fixing the assembly of the sleeve 300. The outer surface of the adjusting dial 200 is sleeved with a protective cover 210. The outer surface of the protective cover 210 is bonded with a non-slip pad. The non-slip pad can increase the friction of the user holding the protective cover 210, thereby facilitating the user to rotate the protective cover 210 to drive the adjusting dial 200.

[0041] The inner cavity of the middle dial groove cavity 202 is movably sleeved with the fixed sleeve 300 through a bearing. The right side of the fixed sleeve 300 is connected with the inner wall of the assembly slot hole 106.

[0042] In addition, the connection between the fixed sleeve 300 and the middle dial groove cavity 202 can be rotatably contacted through damping, thereby avoiding the random rotation of the adjusting dial 200.

[0043] The adjustable wire winding assembly comprises the limiting disc 400 used in cooperation with the adjusting dial 200. A plurality of straight sliding grooves 401 are formed on the surface of the limiting disc 400, which are matched with the limiting dial grooves 201. A center groove 402 is formed through the center of the surface of the limiting disc 400. One end of the fixed sleeve 300 penetrates the inside of the center groove 402 and is connected with the inner wall of the assembly slot hole 106. The center groove 402 is arranged to avoid the limiting disc 400 from shielding the fixed sleeve 300. The outer surface of the fixed sleeve 300 and the inner wall of the center groove 402 are in sliding contact.

[0044] The surface of the adjusting dial 200 is provided with an adjusting assembly 600. The position of the adjusting assembly 600 is adjusted under the cooperation of the adjusting dial 200 and the limiting disc 400, so that the cable 500 is tensioned and can be stored in the adjusting assembly 600. The adjusting assembly 600 comprises a push shaft 610, wherein the push shaft 610 is slidingly arranged in the inner cavity of the limiting slot 201, and the two shaft ends of the push shaft 610 are connected with sliding disc bodies 611. The two sliding disc bodies 611 are in sliding contact with the two sides of the surface of the adjusting dial 200, and the sliding disc bodies 611 can prevent the push shaft 610 from being separated from the inner cavity of the limiting slot 201. The inner cavity of the limiting slot 201 is arc-shaped.

[0045] The shaft end of the push shaft 610 is connected with a connecting rod body 620, wherein the other end of the connecting rod body 620 penetrates through the linear sliding groove 401 and extends to one side of the limiting disc 400, and one end of the outer surface of the connecting rod body 620 is sleeved with a limiting sleeve disc 621. The limiting sleeve disc 621 and the limiting disc 400 are in sliding contact with each other, and under the cooperation of the limiting sleeve disc 621 and the adjacent sliding disc body 611, the connecting rod body 620 can be prevented from being separated from the inner cavity of the linear sliding groove 401. At the same time, the inner cavity of the linear sliding groove 401 is linear.

[0046] Specifically, when the rotating cover 210 is rotated, the adjusting dial 200 is driven to rotate, and then the limiting slot 201 and the limiting disc 400 cooperate to drive the limiting disc 400 and the linear sliding groove 401 to move the push shaft 610, and then the connecting rod body 620 linearly slides in the linear sliding groove 401, and then drives the plurality of push shafts 610 to contract inwardly. At the same time, when the adjusting dial 200 is reversely rotated, the plurality of push shafts 610 are finally expanded, so that the limiting groove cavity 630a formed by the two limiting supports 630 and the adjacent limiting disc 631 is used to pull the cable 500 inwardly or outwardly.

[0047] The end of the push shaft 610 away from the connecting rod body 620 is provided with two limiting supports 630 along the axis, wherein the shaft end of the limiting support 630 is fixedly connected with the adjacent sliding disc body 611, and the other end of the limiting support 630 is fixedly connected with a limiting disc 631. The limiting groove cavity 630a is formed under the cooperation of the two limiting discs 631 and the two limiting supports 630, and the surface of the cable 500 extends into the inner cavity of the limiting groove cavity 630a.

[0048] As Figure 6As shown, the surface of the cable 500 passes through the limiting groove cavity 630a, the fixed end connector 500b passes into the fixed sleeve 300 and extends into the filter 100 to be electrically connected with the electrical elements in the filter 100, while the extension end connector 500a passes through the fixed sleeve 300 and extends out of the fixed sleeve 300, and the surface of the cable 500 and the fixed sleeve 300 are in sliding contact.

[0049] Finally, when the adjusting dial 200 is rotated, the plurality of push shafts 610 expand outward, which drives the limiting support 630 to expand outward, and then under the action of the limiting groove cavity 630a, the cable 500 is pulled to expand, and the cable 500 is retracted on the adjusting dial 200. When the cable 500 is connected with the electrical elements of the external device, the adjusting dial 200 is only needed to be reversely rotated and the extension end connector 500a is only needed to be pulled at one end, which drives the push shaft 610 to drive the limiting support 630 to shrink inward. At this time, the cable 500 is in a relaxed state, and the cable 500 is pulled outward, and finally the extension end connector 500a is pulled outwards, which can be conveniently connected with the electrical elements of the external device. Finally, under the action of the adjustable winding assembly, the cable 500 can be retracted and expanded to facilitate subsequent connection while the cable 500 is arranged and combed.

[0050] The side wall of the filter 100 and outside the shroud 210 is movably provided with an abutting sleeve 700, one end of the surface of the shroud 210 is sleeved with an outer gear ring 710, and the inner cavity of the abutting sleeve 700 is provided with a plurality of limiting dials 720, wherein the limiting dial 720 and the outer gear ring 710 are in meshing abutment;

[0051] The shaft end of the limiting dial 720 is provided with a coil spring 730, which can store force under stress, and automatically reset by itself under no external force constraint, and one end of the surface of the limiting dial 720 is connected with a pull rope 740, wherein the other end of the pull rope 740 is connected with the inner wall of the abutting sleeve 700, wherein the shaft end of the limiting dial 720 is movably connected with the inner wall of the filter 100 through a bearing; and the outer surface of the abutting sleeve 700 is connected with a non-slip rubber, which can increase the stability of the user when rotating the abutting sleeve 700.

[0052] Therefore, when the shroud 210 rotates clockwise, the adjusting dial 200 drives the outer gear ring 710 to rotate, and the limiting rod 720 does not constrain the outer gear ring 710, and when the shroud 210 rotates reversely, the limiting rod 720 is clamped and limited by the coil spring 730, so that the adjusting dial 200 cannot rotate at will, and when the constraint is cancelled, the abutting sleeve 700 is only rotated slightly, and under the action of the coil spring 730, the pull rope 740 stretches the limiting rod 720 to engage the clamping end, so that the limiting rod 720 is disengaged from the outer gear ring 710, at this time, the shroud 210 can be rotated to drive the adjusting dial 200 to rotate, and then the position of the cable 500 is changed, and when the limiting rod 720 engages and clamps the outer gear ring 710, the cable 500 cannot rotate with the shroud 210 at will, and finally the self-locking of the adjusting type take-up assembly is increased.

[0053] The working principle of the radar nonlinear chirp matching filter device is that: the radar echo containing the nonlinear chirp signal is accurately extracted and processed through the filter 100, and the resolution and accuracy of target detection are improved. The filter 100 is internally provided with an adjusting type take-up assembly, which is composed of an adjusting dial 200, a fixed sleeve 300, a limiting disc 400 and the like, and the length of the extension end connector 500a of the cable 500 can be adjusted by rotating the adjusting dial 200, so that the cable 500 can be quickly assembled and disassembled. In addition, the adjusting type take-up assembly is also provided with a self-locking mechanism, that is, the limiting rod 720 on the abutting sleeve 700 is engaged with the outer gear ring 710 on the shroud 210, so that the adjusting dial 200 is prevented from rotating reversely, the position of the cable 500 is fixed, and the stability and reliability of the equipment are ensured.

[0054] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A matched filter device for nonlinear chirp in radar, characterized by: include A filter (100) for accurately extracting and processing radar echoes containing nonlinear chirp signals, and a cable (500) arranged in the inner cavity of the filter (100), wherein an assembly slot (106) is provided on the left side of the inner cavity of the filter (100), wherein the inner cavity of the assembly slot (106) is equipped with an adjustable take-up assembly; The adjustable wire take-up assembly comprises an adjusting dial (200) and a limiting plate (400) used in conjunction with the adjusting dial (200), wherein the adjusting dial (200) and the limiting plate (400) are both arranged in the inner cavity of the assembly slot (106), and wherein the surface of the adjusting dial (200) is mounted with an adjustable assembly assembly (600).

2. The matched filter device for radar nonlinear chirp according to claim 1, characterized in that: The bottoms of the left and right sides of the filter (100) are symmetrically connected with loading plates (101) along the axis, and the front and rear ends of the loading plates (101) are penetrated and connected with fixing bolts (102).

3. The matched filter device for radar nonlinear chirp according to claim 2, characterized in that: A heat-conducting column (103) is attached to the bottom of the filter (100), a heat-conducting paste (104) is provided through the end of the loading plate (101), and a heat-conducting tube (105) is connected through the side of the loading plate (101).

4. The matched filter device for radar nonlinear chirp according to claim 3, characterized in that: The surface of the adjusting dial (200) is symmetrically provided with a plurality of limiting grooves (201), wherein a middle groove cavity (202) is provided through the center of the surface of the adjusting dial (200), a protective cover (210) is provided on the outer surface of the adjusting dial (200), and a fixed sleeve (300) is provided in the inner cavity of the middle groove cavity (202) through a movable sleeve of a bearing.

5. The matched filter device for radar nonlinear chirp according to claim 4, characterized in that: The surface of the limiting plate (400) is provided with a plurality of linear slide grooves (401) that cooperate with the limiting shifting grooves (201), wherein a central groove (402) is provided through the center of the surface of the limiting plate (400).

6. The matched filter device for radar nonlinear chirp according to claim 5, characterized in that: The adjustable assembly component (600) includes a push shaft (610), wherein the push shaft (610) is slidably arranged in the inner cavity of the limit shifting groove (201), and both ends of the push shaft (610) are connected to a sliding disc body (611).

7. The matched filter device for radar nonlinear chirp according to claim 6, characterized in that: The shaft end of the pushing shaft (610) is connected to a connecting rod body (620), and one end of the outer surface of the connecting rod body (620) is sleeved with a limiting sleeve (621).

8. The matched filter device for radar nonlinear chirp according to claim 7, characterized in that: Two limiting pillars (630) are symmetrically arranged along the axis at one end of the pushing shaft (610) away from the connecting rod body (620), and the other end of the limiting pillar (630) is fixedly connected to the limiting support plate (631).

9. The matched filter device for radar nonlinear chirp according to claim 8, characterized in that: An abutment sleeve (700) is movably provided on the side wall of the filter (100) and located outside the protective cover (210), an outer gear ring (710) is sleeved on one end of the surface of the protective cover (210), and a plurality of limiting shift bars (720) are provided in the inner cavity of the abutment sleeve (700), wherein the limiting shift bars (720) and the outer gear ring (710) are meshed and abutted.

10. The matched filter device for radar nonlinear chirp according to claim 9, characterized in that: A coil spring (730) is installed on the axial end of the position-limiting shift bar (720), and a pull rope (740) is connected to one end of the surface of the position-limiting shift bar (720).

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