A mobile split probe radar

Abstract

The present application relates to the technical field of detection equipment, and specifically relates to a mobile split type detection radar, which comprises a shell and a laser emitter, a direction adjusting mirror, a prism assembly, a driving mechanism and a receiver which are all inserted into the shell, wherein the prism assembly comprises a rotating shaft and multiple prisms, the rotating shaft is vertically arranged and can rotate around its own axis; the multiple prisms are all sleeved on the rotating shaft, the number of reflecting surfaces of the multiple prisms is different, the prisms are configured to reflect laser to the outside of the shell, and the multiple prisms can rotate synchronously with the rotating shaft and can move axially relative to the rotating shaft to switch the prisms for reflecting laser. When facing a scene requiring high resolution, the prisms with more reflecting surfaces can be used to ensure detection accuracy, and when facing a scene requiring low resolution, the prisms with fewer reflecting surfaces can be used to reduce the burden of data processing and energy waste while ensuring detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of detection equipment technology, and in particular to a mobile, split-type detection radar. Background Technology

[0002] A radar is a device that uses the principle of electromagnetic wave reflection to detect information such as the position, speed, and height of a target object. Its basic principle is to emit electromagnetic waves and receive echo signals, and analyze the time delay and frequency changes of these signals to determine parameters such as the target's position, speed, and direction.

[0003] In related technologies, such as Chinese patent CN208255418U, a lidar device is disclosed. The lidar device includes a lidar structure and a rotating structure. The lidar structure includes multiple laser scanning components mounted on the rotating structure. Each laser scanning component includes multiple lasers. The laser emitted by each laser is at an emission angle relative to the rotation axis of the rotating structure. The multiple lasers are distributed regularly around the rotation axis of the rotating structure. The emission angles of the multiple lasers relative to the rotation axis increase in a gradient. By rotating the rotating structure, the multiple lasers are driven to rotate to scan areas with multiple rotation angles.

[0004] However, existing radar detection devices also have some problems in practical use: they cannot adjust the scanning resolution of the prism assembly according to different usage scenarios, which limits their application. Summary of the Invention

[0005] Therefore, it is necessary to provide a mobile, split-type detection radar to address the problem of poor adjustability in current radar detection devices.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A mobile split-type detection radar, comprising a housing and a laser emitter, a direction-adjusting mirror, a prism assembly, a drive mechanism, and a receiver, all of which are inserted into the housing;

[0008] The laser emitter is configured to emit a laser beam toward the aligning mirror;

[0009] The directional mirror is capable of oscillating back and forth about a horizontal axis and is configured to reflect the laser onto the prism assembly;

[0010] The prism assembly comprises a rotating shaft and a plurality of prisms, the rotating shaft is vertically arranged and can rotate around its axis; the plurality of prisms are sleeved on the rotating shaft, the plurality of prisms have different numbers of reflecting surfaces, the prisms are configured to reflect the laser light outside the shell, and the plurality of prisms can rotate synchronously with the rotating shaft to change the reflection angle of the laser light, and can slide axially relative to the rotating shaft to switch the prism for reflecting the laser light.

[0011] The driving mechanism is configured to provide driving force for the sliding of the plurality of prisms.

[0012] The receiver is configured to receive the laser light reflected by the object.

[0013] Further, the prism assembly comprises a first base sleeve and a second base sleeve, the first base sleeve and the second base sleeve are sleeved on the rotating shaft and form a sliding key fit with the rotating shaft, and the first base sleeve and the second base sleeve are detachably connected; the plurality of prisms are collectively sleeved on the second base sleeve and are clamped by the first base sleeve and the second base sleeve; the driving mechanism comprises a first screw sleeve, a second screw sleeve, a connecting ring and a driving piece, the first screw sleeve is arranged on the shell, can rotate around its axis, and is sleeved on the outer periphery of the rotating shaft; the second screw sleeve is inserted between the first screw sleeve and the rotating shaft and forms a screw fit with the first screw sleeve; the connecting ring is collectively sleeved on the second screw sleeve and the first base sleeve and can rotate synchronously with the second screw sleeve and drive the first base sleeve to move axially; and the driving piece is configured to provide driving force for the rotation of the first screw sleeve around its axis.

[0014] Further, the prism assembly further comprises a lower protective shell, an upper protective shell, a connecting piece and two sealing and cleaning rings, the lower protective shell is arranged on the shell, is sleeved on the outer periphery of the plurality of prisms, can rotate around the axis of the rotating shaft, and has an open top; the upper protective shell is sleeved on the outer periphery of the plurality of prisms, is located above the lower protective shell, is spaced apart from the lower protective shell along the axial direction of the rotating shaft, and has an open bottom; the lower protective shell and the upper protective shell are connected to the second base sleeve through the connecting piece; the two sealing and cleaning rings are respectively fixedly inserted at the open top of the lower protective shell and the open bottom of the upper protective shell, and are configured to seal the gap between the prisms and the lower protective shell or the upper protective shell and clean the reflecting surfaces of the prisms.

[0015] Further, the prism assembly further comprises a flexible sleeve, which is inserted into the lower protective shell and sleeved on the outer periphery of the rotating shaft, and two ends of the flexible sleeve are respectively sealed on the lower protective shell and the second base sleeve.

[0016] Further, the uppermost prism has a non-working annular surface; the mobile split detection radar further comprises a plurality of hooks and a plurality of slots, the plurality of slots are arranged on the non-working annular surface and arranged circumferentially, and the plurality of hooks are arranged on the first base sleeve and arranged circumferentially and clamped with the slots.

[0017] Further, when the mobile split detection radar is not working, the non-working annular surface is located at the interval between the lower protective shell and the upper protective shell.

[0018] Further, the prism is a split structure and is circumferentially divided into N prism parts, N is a natural number greater than or equal to three, and adjacent prism parts are clamped and arranged.

[0019] Further, N is equal to four or five or six or seven.

[0020] Further, the number of prisms is three; the number of reflecting surfaces of the prism parts on different prisms is one, two and four respectively.

[0021] Further, when any prism works, every interval preset time, the plurality of prisms are driven by the driving mechanism to slide along the axial direction of the rotating shaft to change the position of the laser reflected by the same prism.

[0022] The beneficial effects of the present application are:

[0023] The mobile split detection radar provided by the present application can drive a plurality of prisms to slide along the axial direction of the rotating shaft through the driving mechanism when facing a scene requiring high resolution, so that the prism with more reflecting surfaces is used to reflect the laser, thereby ensuring the detection accuracy; when facing a scene requiring low resolution, the plurality of prisms are driven by the driving mechanism to slide along the axial direction of the rotating shaft, so that the prism with fewer reflecting surfaces is used to reflect the laser, thereby ensuring the detection accuracy, reducing the burden of data processing, and reducing energy consumption.

[0024] Furthermore, the prism assembly also includes a lower protective shell, an upper protective shell, a screw, and two sealing cleaning rings. During use, the lower protective shell, upper protective shell, and two sealing cleaning rings protect unused prisms, reducing the probability of dust and impurities falling onto the reflective surface of unused prisms. This reduces the negative impact of dust and impurities on the subsequent prism reflection accuracy. When multiple prisms slide, the sealing cleaning rings can simultaneously clean the reflective surfaces of the prisms, ensuring that the reflective surfaces of the prisms are always clean, thereby ensuring that the prisms maintain high accuracy when reflecting laser light. Attached Figure Description

[0025] Figure 1 A three-dimensional structural diagram of the mobile split-type detection radar provided in the first embodiment of the present invention;

[0026] Figure 2 A three-dimensional structural diagram of a mobile split-type detection radar with end caps and a light-transmitting ring removed, provided in the first embodiment of the present invention;

[0027] Figure 3 A cross-sectional structural schematic diagram of the mobile split-type detection radar provided in the first embodiment of the present invention;

[0028] Figure 4 for Figure 3 A magnified view of the structure at point A in the middle;

[0029] Figure 5 A three-dimensional structural diagram of the prism assembly without the rotating shaft of the mobile split-type detection radar provided in the first embodiment of the present invention;

[0030] Figure 6 A cross-sectional view of the prism assembly without the rotating shaft of the mobile split-type detection radar provided in the first embodiment of the present invention.

[0031] Figure 7 An exploded view of the prism assembly without the rotating shaft in the mobile split-type detection radar provided in the first embodiment of the present invention.

[0032] Figure 8 This is a three-dimensional structural diagram of the second base and prism assembly of the mobile split-type detection radar provided in the second embodiment of the present invention.

[0033] Figure 9 This is a three-dimensional structural diagram of the second base and prism assembly of the mobile split-type detection radar provided in the third embodiment of the present invention.

[0034] Figure 10 This is a three-dimensional structural diagram of the second base and prism assembly of the mobile split-type detection radar provided in the fourth embodiment of the present invention.

[0035] Wherein:

[0036] 1. housing; 101, base; 1011, cavity; 102, support plate; 1021, support; 103, light-transmitting ring; 104, end cover; 1041, raised portion;

[0037] 2. laser emitter;

[0038] 3. steering mirror;

[0039] 401, rotating shaft; 402, prism; 4021, non-working annular surface; 403, first base; 4031, slot; 404, second base; 405, lower protective shell; 4051, support; 4052, sliding block; 406, upper protective shell; 407, screw rod; 408, sealing and cleaning ring; 409, flexible sleeve;

[0040] 5. driving mechanism; 501, first screw sleeve; 502, second screw sleeve; 503, connecting ring; 504, hollow shaft motor;

[0041] 6. transmission mechanism; 601, first driving motor; 602, rotating disc; 603, connecting rod;

[0042] 7. second driving motor. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0044] In this paper, the serial numbers of components, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. In this paper, "connection" and "coupling" include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0046] As shown in Figures 1 to 7 The first embodiment of the present application provides a mobile split type detection radar, which is provided with a shell 1 and a laser emitter 2, a steering mirror 3, a prism assembly, a driving mechanism 5 and a receiver, which are all inserted into the shell 1; wherein the laser emitter 2 is configured to emit laser to the steering mirror 3; the steering mirror 3 is capable of reciprocating swing around a horizontal axis, and is configured to reflect the laser to the prism assembly; the prism assembly comprises a rotating shaft 401 and a plurality of prisms 402; the rotating shaft 401 is vertically arranged and is capable of rotating around its own axis; the plurality of prisms 402 are all sleeved on the rotating shaft 401; the reflecting surfaces of the plurality of prisms 402 are different in number; the prisms 402 are configured to reflect the laser to the outside of the shell 1; the plurality of prisms 402 are capable of rotating synchronously with the rotating shaft 401 to change the reflection angle of the laser, and are capable of sliding axially relative to the rotating shaft 401 to switch the prisms 402 used for reflecting the laser; the driving mechanism 5 is configured to provide driving force for the sliding of the plurality of prisms 402; and the receiver is configured to receive the laser reflected by the object.

[0047] Specific to the embodiment, the shell 1 has a base 101, a support plate 102, a light-transmitting ring 103 and an end cover 104, wherein the base 101 has a chamber 1011 with a top opening; the plate face of the support plate 102 is horizontally arranged and is sealed at the top of the chamber 1011; the axis of the light-transmitting ring 103 extends in the vertical direction and is arranged at the top of the support plate 102; and the end cover 104 covers the top of the light-transmitting ring 103. The laser emitter 2 is installed at the top of the support plate 102. In order to facilitate the installation of the steering mirror 3, a support 1021 is arranged at the top of the support plate 102, and the steering mirror 3 is rotationally arranged on the support 1021 when installed. In order to facilitate the provision of driving force for the rotation of the steering mirror 3, the mobile split-type detection radar is arranged to further include a transmission mechanism 6, which is arranged to include a first driving motor 601, a rotating disc 602 and a connecting rod 603. The first driving motor 601 is installed at the top of the support plate 102, and the axis of the motor shaft of the first driving motor 601 is arranged in parallel with the rotation axis of the steering mirror 3. The rotating disc 602 is fixedly sleeved on the motor shaft of the first driving motor 601. The connecting rod 603 extends in a direction perpendicular to the axis of the rotating disc 602, and one end is eccentrically hinged to the disc face of the rotating disc 602, and the other end is hinged to the steering mirror 3.

[0048] In order to facilitate the installation of the rotating shaft 401, a raised portion 1041 is arranged at the top of the end cover 104, which is arranged in a bottom-opened cylindrical structure. The rotating shaft 401 is rotationally inserted into the raised portion 1041 at the top end when installed, and the bottom end penetrates through the support plate 102 and is inserted into the chamber 1011. In order to facilitate the provision of driving force for the rotation of the rotating shaft 401, the mobile split-type detection radar is arranged to further include a second driving motor 7, which is installed at the bottom of the chamber 1011. The motor shaft of the second driving motor 7 is arranged upward and is coaxially fixed to the bottom of the rotating shaft 401.

[0049] In use, when facing a complex scene with high requirements for scanning resolution, for example, high-precision traffic detection in a bustling urban area, where vehicles and pedestrians are dense and traffic conditions are difficult to predict, accurate information such as the detailed position, speed and motion trajectory of each target object needs to be obtained; at this time, the plurality of prisms 402 are driven by the driving mechanism 5 to slide along the axis direction of the rotating shaft 401, so that the prisms 402 with a large number of reflecting surfaces are adjusted to the same horizontal height as the direction-changing mirror 3, and then the laser emitter 2, the first driving motor 601 and the second driving motor 7 are started at the same time, wherein the laser emitter 2 emits laser to the direction-changing mirror 3, the first driving motor 601 drives the rotating disc 602 to rotate, the rotating disc 602 drives the connecting rod 603 to make a compound motion, and the connecting rod 603 synchronously drives the direction-changing mirror 3 to swing back and forth around the horizontal axis, so that the laser reflected from the prisms 402 to the outside of the shell 1 continuously moves in the fan-shaped area in the vertical direction, and the second driving motor 7 drives the rotating shaft 401 to rotate, and the rotating shaft 401 drives all the prisms 402 to rotate, so that the laser reflected from the prisms 402 to the outside of the shell 1 continuously moves in the fan-shaped area in the horizontal direction, thereby realizing omnidirectional detection of the scanning area; since the prisms 402 with a large number of reflecting surfaces can reflect the laser more carefully and densely, more and denser reflection points of the laser are formed in the scanning area, thereby greatly improving the scanning resolution, providing rich and high-precision data for radar detection, and ensuring the accuracy of target object detection.

[0050] On the contrary, in some scenes with relatively low requirements for scanning resolution, such as road monitoring in remote areas, the traffic flow in the area is sparse and the environment is relatively simple, and too high resolution not only cannot fully play a role, but also increases the pressure of data processing and unnecessary energy consumption; in this case, the plurality of prisms 402 are driven by the driving mechanism 5 to slide along the axis direction of the rotating shaft 401, so that the prisms 402 with a small number of reflecting surfaces are adjusted to the same horizontal height as the direction-changing mirror 3; at this time, the prisms 402 with a small number of reflecting surfaces, although the number of reflecting surfaces is limited, are sufficient to meet the effective detection of key information such as the position and speed of the target object in the low-resolution scene, while ensuring accurate identification of the target object and meeting the basic detection accuracy requirements, the amount of data processed by the system is significantly reduced, and the data processing burden is greatly reduced; at the same time, since unnecessary laser emission and complex data processing links are reduced, energy consumption is also reduced, efficient use of energy is realized, and energy waste is avoided.

[0051] Optionally, the driving mechanism 5 can start working according to a preset scene recognition algorithm or a user manually input instruction.

[0052] Further, the prism assembly is arranged to include a first base sleeve 403 and a second base sleeve 404, the first base sleeve 403 and the second base sleeve 404 are sleeved on the rotating shaft 401 and form a sliding key cooperation with the rotating shaft 401, and the first base sleeve 403 and the second base sleeve 404 are detachably connected; a plurality of prisms 402 are collectively sleeved on the second base sleeve 404 and clamped by the first base sleeve 403 and the second base sleeve 404; the driving mechanism 5 includes a first screw sleeve 501, a second screw sleeve 502, a connecting ring 503 and a driving member, the first screw sleeve 501 is arranged on the shell 1 and can rotate around its own axis and is sleeved on the outer periphery of the rotating shaft 401; the second screw sleeve 502 is inserted between the first screw sleeve 501 and the rotating shaft 401 and forms a screw cooperation with the first screw sleeve 501; the connecting ring 503 is collectively sleeved on the second screw sleeve 502 and the first base sleeve 403 and can rotate synchronously with the second screw sleeve 502 and drive the first base sleeve 403 to move axially synchronously; the driving member is configured to provide a driving force for the rotation of the first screw sleeve 501 around its own axis.

[0053] Specifically, the first base sleeve 403 and the second base sleeve 404 are both inverted T-shaped structures, and the first base sleeve 403 is located at the top of the second base sleeve 404 and can be detachably connected together by screws; in order to realize the sliding key cooperation between the first base sleeve 403 and the rotating shaft 401, a first sliding groove is arranged on the inner peripheral wall of the first base sleeve 403 and extends along the axis direction of the first base sleeve 403, a first flat key is inserted on the rotating shaft 401 and extends along the axis direction of the rotating shaft 401 and is slidably inserted in the first sliding groove during installation, so as to ensure that the first base sleeve 403 can move axially relative to the rotating shaft 401 and rotate synchronously with the rotating shaft 401; similarly, in order to realize the sliding key cooperation between the second base sleeve 404 and the rotating shaft 401, a second sliding groove is arranged on the inner peripheral wall of the second base sleeve 404 and extends along the axis direction of the second base sleeve 404, a second flat key is inserted on the rotating shaft 401 and extends along the axis direction of the rotating shaft 401 and is slidably inserted in the second sliding groove during installation, so as to ensure that the second base sleeve 404 can move axially relative to the rotating shaft 401 and rotate synchronously with the rotating shaft 401. A plurality of prisms 402 are collectively clamped by the large end of the first base sleeve 403 and the large end of the second base sleeve 404.

[0054] The driving member is a hollow shaft motor 504 which is inserted into the protrusion 1041 and extends along the vertical direction. The first threaded sleeve 501 is fixedly inserted into the hollow shaft of the hollow shaft motor 504 and can be driven to rotate around its axis by the hollow shaft motor 504. The connecting ring 503 is fixedly sleeved on the bottom of the second threaded sleeve 502, and the first ring protrusion is arranged on the inner circumferential wall of the connecting ring 503. The first ring groove is arranged on the top outer circumferential wall of the first base 403, and the first ring protrusion is slidably inserted into the first ring groove during installation, so that the second threaded sleeve 502 and the first base 403 can move axially and rotate relative to each other.

[0055] During use, the hollow shaft motor 504 is started to drive the first threaded sleeve 501 to rotate, and the first threaded sleeve 501 drives the second threaded sleeve 502 to move axially through the screw connection. The second threaded sleeve 502 synchronously drives the first base 403, the second base 404 and the plurality of prisms 402 to move axially through the connecting ring 503, so that the switching and steering mirror 3 is located at the same horizontal height as the prism 402.

[0056] Further, in order to protect and clean the prisms 402, the prism assembly further comprises a lower protective shell 405, an upper protective shell 406, a screw rod 407 and two sealing and cleaning rings 408. The lower protective shell 405 is arranged on the housing 1 and sleeved on the outer circumferences of the plurality of prisms 402, and can rotate around the axis of the rotating shaft 401. The top of the lower protective shell 405 is open. The upper protective shell 406 is sleeved on the outer circumferences of the plurality of prisms 402 and is located above the lower protective shell 405 and is spaced apart from the lower protective shell 405 along the axis of the rotating shaft 401. The bottom of the upper protective shell 406 is open. The lower protective shell 405 and the upper protective shell 406 are connected to the second base 404 by a connecting member. The two sealing and cleaning rings 408 are respectively fixedly inserted into the top opening of the lower protective shell 405 and the bottom opening of the upper protective shell 406, and are configured to seal the gap between the prisms 402 and the lower protective shell 405 or the upper protective shell 406, and to clean the reflecting surface of the prisms 402.

[0057] Specifically, the lower protective shell 405 and the upper protective shell 406 are both cylindrical structures, and the lower protective shell 405 is arranged through the support plate 102 during installation, and an annular support 4051 is arranged on the outer peripheral wall of the lower protective shell 405, which is pressed on the top of the support plate 102 during installation to ensure that the lower protective shell 405 can be supported. The gap between the lower protective shell 405 and the upper protective shell 406 is at the same horizontal height as the direction-changing mirror 3, which ensures that the prism 402 can be exposed during use, facilitating the reflection of laser light. The connecting member is a screw rod 407 and a nut, the screw rod 407 is arranged in parallel with the axis of the rotating shaft 401 during installation, the head is located at the bottom of the lower protective shell 405 and forms a stop cooperation with the lower protective shell 405, the rod part passes through the lower protective shell 405, the second base 404, the large end of the first base 403, and the upper protective shell 406 in turn, and forms a stop cooperation with the inner top wall of the upper protective shell 406, which ensures that the upper protective shell 406 can be supported, and the nut is screwed on the top of the screw rod 407 during installation, located at the top of the upper protective shell 406, and forms a stop cooperation with the upper protective shell 406, which ensures that the upper protective shell 406 can be fixed.

[0058] Optionally, the number of screw rods 407 and nuts can be multiple, and they are uniformly arranged in the circumferential direction, so that they can uniformly exert fastening force on the upper protective shell 406 and the lower protective shell 405 during the entire use process, which is beneficial to ensure the stability of the structure.

[0059] Optionally, the number of screw rods 407 and nuts can be multiple, and they are uniformly arranged in the circumferential direction, so that they can uniformly exert fastening force on the upper protective shell 406 and the lower protective shell 405 during the entire use process, which is beneficial to ensure the stability of the structure.

[0060] Optionally, the sealing and cleaning ring 408 can be made of rubber.

[0061] During use, the lower protective shell 405, the upper protective shell 406, and the two sealing and cleaning rings 408 jointly constitute a relatively closed space to protect the unused prism 402, so that the dust and impurities contained in the external air are difficult to directly fall on the reflecting surface of the unused prism 402 in most cases, thereby greatly reducing the possibility of negative effects on the subsequent reflection accuracy of the prism 402 due to the contamination of dust and impurities on the reflecting surface.

[0062] When the plurality of prisms 402 slide along the axial direction of the rotating shaft 401, due to the fact that the sealing and cleaning ring 408 is made of rubber material, which has good flexibility and adhesion, when the prism 402 slides through the sealing and cleaning ring 408, the sealing and cleaning ring 408 can be tightly attached to the gap between the prism 402 and the lower protective shell 405 or the upper protective shell 406, forming an effective seal to prevent dust, impurities and the like from entering the inside of the protective shell. At the same time, the sealing and cleaning ring 408 made of rubber material can also carefully wipe and clean the reflecting surface of the prism 402. With the sliding of the prism 402, the sealing and cleaning ring 408 can remove the dust, stains and fine impurities accumulated in the early use process on the reflecting surface one by one, ensuring that the reflecting surface of the prism 402 is always in a clean state, thereby ensuring that the prism 402 can always reflect laser with high precision during the entire working process, providing stable and accurate reflection signals for the detection radar, thereby ensuring the accuracy and reliability of the detection results of the detection radar.

[0063] Further, in order to reduce the entry of dust and impurities from the gap between the lower protective shell 405 and the rotating shaft 401 into the inside of the lower protective shell 405, thereby polluting the reflecting surface of the prism 402, the prism assembly is further provided with a flexible sleeve 409, which is inserted into the lower protective shell 405 and is sleeved on the outer periphery of the rotating shaft 401. The two ends of the flexible sleeve 409 are respectively sealed on the lower protective shell 405 and the second base sleeve 404.

[0064] Specifically, the top end of the flexible sleeve 409 is coaxially arranged at the bottom end of the second base sleeve 404, and the bottom end of the flexible sleeve 409 is coaxially arranged on the inner bottom wall of the second base sleeve 404. In this way, the flexible sleeve 409, the sealing and cleaning ring 408, the lower protective shell 405 and the second base sleeve 404 jointly form a relatively closed space, thereby effectively reducing the entry of dust and impurities from the gap between the lower protective shell 405 and the rotating shaft 401 into the inside of the lower protective shell 405, which causes pollution to the reflecting surface of the prism 402.

[0065] Further, in order to improve the connection stability between the prism 402 and the first base sleeve 403, the prism 402 located at the uppermost side is provided with a non-working annular surface 4021; the movable split detection radar further comprises a plurality of hooks and a plurality of slots, the plurality of slots are arranged on the non-working annular surface 4021 and are arranged in a circumferential direction; and the plurality of hooks are arranged on the first base sleeve 403 and are arranged in a circumferential direction and are connected with the slots.

[0066] Specifically, the number of hooks can be two, which are uniformly arranged in a circumferential direction; and the number of slots is correspondingly two, which are uniformly arranged in a circumferential direction.

[0067] Further, the non-working annular surface 4021 is arranged to be located at the interval between the lower protective shell 405 and the upper protective shell 406 when the mobile split detection radar is not working. In this way, when the mobile split detection radar is not working, all the prisms 402 can be arranged in the lower protective shell 405, so that all the prisms 402 can be protected, the probability of dust and impurities falling on the reflecting surface of the prisms 402 is reduced, and the negative influence of the dust and impurities on the subsequent reflecting accuracy of the prisms 402 is reduced.

[0068] Further, in a complex and changeable use environment, the radar device is inevitably subjected to various conditions to cause the prism 402 to malfunction. Once the traditional integrated prism 402 has a problem, the entire prism 402 often needs to be replaced, which not only has high cost, but also has a complicated maintenance process, causes the device to be out of service for a long time, and seriously affects the work efficiency. In order to solve this problem, the prism 402 is arranged to have a split structure and is equally divided into N prism parts in the circumferential direction, N is a natural number greater than or equal to three, and the adjacent prism parts are arranged in a clamping manner.

[0069] Specifically, in the embodiment, the prism 402 is equally divided into four prism parts when N is equal to four. In order to realize the clamping cooperation between the adjacent prism parts, a slide convex is arranged on both sides of two opposite prism parts, the slide convex extends along the axis direction of the prism 402, the cross-sectional shape of the slide convex is a trapezoid, a third slide groove is arranged on both sides of the other two opposite prism parts, the third slide groove extends along the axis direction of the prism 402, the cross-sectional shape of the third slide groove is a trapezoid, and the slide convex is slidably inserted into the third slide groove during installation. Therefore, the two adjacent prism parts can only be separated in the axial direction, and the two ends of the prism 402 are blocked by the large end of the first base sleeve 403 and the large end of the second base sleeve 404, so that the structural stability of the prism 402 can be improved.

[0070] During use, when one prism part malfunctions due to external impact, aging or other reasons, the split structure of the prism 402 enables the malfunctioning prism part to be individually disassembled without replacing the entire prism 402, and then a new prism part is replaced, so that the maintenance cost can be reduced and the maintenance efficiency can be improved.

[0071] Further, the number of the prism 402 can be three, and the number of the reflecting surfaces of the prism parts of each prism 402 is one, two and four respectively. At this time, the total number of the reflecting surfaces of the three prisms 402 is four, eight and sixteen respectively.

[0072] As Figure 8As shown in the figure, the prism assembly provided by the second embodiment of the present application is arranged to include three prisms 402, each of which is equally divided into five prism sections in the circumferential direction, and the number of reflecting surfaces of the prism sections of each prism 402 is one, two and four respectively, at which time the total number of reflecting surfaces of the three prisms 402 is five, ten and twenty respectively.

[0073] As shown in the figure, the prism assembly provided by the third embodiment of the present application is arranged to include three prisms 402, each of which is equally divided into six prism sections in the circumferential direction, and the number of reflecting surfaces of the prism sections of each prism 402 is one, two and four respectively, at which time the total number of reflecting surfaces of the three prisms 402 is six, twelve and twenty-four respectively. Figure 9 As shown in the figure, the prism assembly provided by the fourth embodiment of the present application is arranged to include three prisms 402, each of which is equally divided into seven prism sections in the circumferential direction, and the number of reflecting surfaces of the prism sections of each prism 402 is one, two and four respectively, at which time the total number of reflecting surfaces of the three prisms 402 is seven, fourteen and twenty-eight respectively.

[0074] Figure 10 Through the above arrangement, the total number of reflecting surfaces of all prisms 402 is different, so that most of the resolution use scenarios can be adapted.

[0075] In other embodiments, when any prism 402 is working, every interval of a preset time, the plurality of prisms 402 are driven by the driving mechanism 5 to slide along the axial direction relative to the rotating shaft 401, so as to change the position of the same prism 402 reflecting the laser.

[0076] Specific to the present embodiment, the adjustment mechanism is arranged because the laser has a high energy density in the continuous emission process. If the same position on the same prism 402 is irradiated for a long time, the position will continuously bear a high energy impact, which may cause a series of adverse consequences: on the one hand, the accumulation of too high energy will cause the local temperature of the prism 402 to rise sharply, and then cause the thermal deformation of the material of the prism 402. Once the thermal deformation occurs, the optical structure of the prism 402 will be damaged, and the reflection angle and precision of the laser will deviate, which directly affects the accurate measurement of the position, speed and other parameters of the target object by the detection radar; on the other hand, long-term high-energy laser irradiation may also cause the reflection coating on the surface of the prism 402 to gradually age and peel off. After the reflection coating is damaged, the reflection efficiency of the prism 402 to the laser is greatly reduced, which will also seriously interfere with the quality of the echo signal received by the detection radar, and reduce the detection performance of the radar system.

[0077]

[0078] ​​By adjusting the position of the laser reflected by the prism 402 every preset time interval, the energy of the laser can be dispersed to different parts of the prism 402, so that the local heat deformation of the prism 402 caused by excessive heating is effectively avoided, and the aging loss of the reflective coating at a single position is reduced, thereby greatly prolonging the service life of the prism 402, maintaining the good performance of the prism 402 during the entire detection of the radar, and ensuring that the radar can continuously and stably detect target objects with high precision to provide reliable data support for practical applications.

[0079] In other embodiments, the position of the prism 402 can also be adjusted by manually rotating the first screw sleeve 501; at this time, in order to facilitate the determination of whether the prism 402 is adjusted in place, a plurality of insertion slots 4031 are arranged on the outer peripheral wall of the small end of the first base sleeve 403, the plurality of insertion slots 4031 are arranged in the axial direction of the first base sleeve 403, a compression spring and a sliding block 4052 are inserted into the top of the lower protective shell 405, the compression spring is horizontally arranged and connected between the sliding block 4052 and the lower protective shell 405, the sliding block 4052 has a tendency to extend out of the lower protective shell 405 under the action of the compression spring, and the sliding block 4052 can be clamped with the insertion slot 4031.

[0080] During use, when the first screw sleeve 501 is rotated, a "click" sound is heard when the sliding block 4052 is inserted into the next insertion slot 4031, at this time, the prism 402 is located at the interval between the lower protective shell 405 and the upper protective shell 406.

[0081] The technical features of the above embodiments can be combined in any manner, and in order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0082] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application.

Claims

1. A mobile, split-type detection radar, characterized in that, Includes a housing and a laser emitter, a directional mirror, a prism assembly, a drive mechanism, and a receiver, all of which are inserted into the housing; The laser emitter is configured to emit a laser towards the alignment mirror; The directional mirror can swing back and forth about a horizontal axis and is configured to reflect laser light onto the prism assembly; The prism assembly includes a rotating shaft and multiple prisms. The rotating shaft is vertically positioned and can rotate around its own axis. Multiple prisms are all fitted onto the rotating shaft. The number of reflecting surfaces of the multiple prisms is different. The prisms are configured to reflect laser light to the outside of the housing. The multiple prisms can rotate synchronously with the rotating shaft to change the reflection angle of the laser light, and can also slide axially relative to the rotating shaft to switch the prism used to reflect the laser light. The receiver is configured to receive laser light reflected back from an object; The prism assembly also includes a first base sleeve, a second base sleeve, a lower protective shell, an upper protective shell, a connector, and two sealing and cleaning rings. Both the first and second base sleeves are fitted onto the rotating shaft and form a keyway engagement with it. The first and second base sleeves are detachably connected. Multiple prisms are fitted onto the second base sleeve and held in place by the first and second base sleeves. The drive mechanism includes a first threaded sleeve, a second threaded sleeve, a connecting ring, and a drive member. The first threaded sleeve is disposed on the outer shell and can rotate around its own axis, fitting around the outer periphery of the rotating shaft. The second threaded sleeve is inserted between the first threaded sleeve and the rotating shaft, forming a helical engagement with it. The connecting ring is fitted onto both the second threaded sleeve and the first base sleeve, and can rotate synchronously with the second threaded sleeve and simultaneously drive the first base sleeve to move axially. The drive member is configured to provide the driving force for the first threaded sleeve to rotate around its own axis, enabling the multiple prisms to slide axially relative to the rotating shaft. The lower protective shell is mounted on the outer shell and fitted around the outer periphery of multiple prisms, and can rotate around the axis of rotation. The top of the lower protective shell is open. The upper protective shell is fitted around the outer periphery of multiple prisms and is located above the lower protective shell, and is spaced apart from the lower protective shell along the axis of rotation. The bottom of the upper protective shell is open. The lower and upper protective shells are connected to the second base sleeve by a connector. Two sealing cleaning rings are fixedly inserted into the top opening of the lower protective shell and the bottom opening of the upper protective shell, respectively, and are configured to both seal the gap between the prism and the lower or upper protective shell, and to clean the reflecting surface of the prism. The gap between the lower and upper protective shells and the directional mirror are at the same level to ensure that the prism can be exposed during use, which is convenient for reflecting laser light. The prism is a split structure and is divided into N prism segments along the circumference, where N is a natural number greater than or equal to three. Adjacent prism segments are snapped together. The prism assembly also includes a flexible sleeve, which is inserted into the lower protective shell and sleeved on the outer circumference of the rotating shaft. The two ends of the flexible sleeve are sealed on the lower protective shell and the second base sleeve, respectively. The prism located on the uppermost side has a non-working toroidal surface; the mobile split-type detection radar also includes an equal number of hooks and slots, with multiple slots arranged circumferentially on the non-working toroidal surface; multiple hooks are arranged circumferentially on the first base sleeve and engage with the slots; when the mobile split-type detection radar is not in operation, the non-working toroidal surface is located in the gap between the lower protective shell and the upper protective shell.

2. The mobile split-type detection radar according to claim 1, characterized in that, N equals four, five, six, or seven.

3. The mobile split-type detection radar according to claim 2, characterized in that, There are three prisms; the number of reflecting surfaces of the prisms on different prisms are one, two, and four, respectively.

4. The mobile split-type detection radar according to claim 1, characterized in that, When any prism is working, at preset intervals, the drive mechanism drives multiple prisms to slide axially relative to the rotation axis, thereby changing the position of the laser reflected by the same prism.

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