Mobile split type detection radar

Abstract

The invention relates to the technical field of detection equipment, in particular to a movable split type detection radar which comprises a shell, a laser transmitter, a direction adjusting mirror, a prism assembly, a driving mechanism and a receiver, the laser transmitter, the direction adjusting mirror, the prism assembly, the driving mechanism and the receiver are all inserted into the shell, the prism assembly comprises a rotating shaft and a plurality of prisms, the rotating shaft is vertically arranged, and the prisms are arranged on the rotating shaft. The rotating shaft can rotate around the axis of the rotating shaft; the rotating shaft is sleeved with the multiple prisms, the numbers of the reflecting faces of the multiple prisms are different, the prisms are configured to be capable of reflecting the laser to the outside of the shell, and the multiple prisms can synchronously rotate along with the rotating shaft and can also axially move relative to the rotating shaft so that the prisms used for reflecting the laser can be switched. According to the technical scheme, the prism with a large number of reflecting surfaces can be adopted to ensure the detection precision when facing a scene needing high resolution, and the prism with a small number of reflecting surfaces can be adopted when facing a scene needing low resolution, so that the data processing burden and the energy waste are reduced while the detection precision is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly to a mobile split detection radar. Background Art

[0002] A detection 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 change of these signals to determine parameters such as the position, speed, and direction of the target.

[0003] In related technologies, for example, Chinese Patent CN208255418U discloses a lidar device. The lidar device includes a lidar structure and a rotating structure. The lidar structure includes a plurality of laser scanning components mounted on the rotating structure. Each laser scanning component includes a plurality of lasers. The lasers respectively emitted by each laser form an emission angle with respect to the rotation axis of the rotating structure. The plurality of lasers are regularly distributed around the rotation axis of the rotating structure. The emission angles of the plurality of lasers with respect to the rotation axis increase in gradient in sequence. Through the rotation of the rotating structure, the plurality of lasers are driven to rotate to scan areas at multiple rotation angles.

[0004] However, there are also some problems in the actual use of existing radar detection devices: they cannot adjust the scanning resolution of the prism assembly according to different usage scenarios, resulting in limitations in application. Summary of the Invention

[0005] Based on this, in view of the problem of poor adjustability existing in current radar detection devices, it is necessary to provide a mobile split detection radar.

[0006] The above object is achieved by the following technical solutions: A mobile split detection radar, the mobile split detection radar includes a housing and a laser emitter, a deflecting mirror, a prism assembly, a driving mechanism, and a receiver that are all inserted into the housing; Wherein, the laser emitter is configured to be able to emit laser light towards the deflecting mirror; The deflecting mirror can swing reciprocally around a horizontal axis and is configured to be able to reflect the laser light onto the prism assembly; The prism assembly includes a rotating shaft and a plurality of prisms. The rotating shaft is vertically arranged and can rotate around its own axis; the plurality of prisms are all sleeved on the rotating shaft. The number of reflecting surfaces of the plurality of prisms is different. The prisms are configured to be able to reflect the laser light outside the housing. The plurality of prisms can both 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 for reflecting the laser light; The driving mechanism is configured to be able to provide the driving force for the sliding of the multiple prisms; The receiver is configured to be able to receive the laser reflected back by the object.

[0007] Further, the prism assembly includes a first base sleeve and a second base sleeve. Both the first base sleeve and the second base sleeve are sleeved on the rotating shaft and form a spline fit with the rotating shaft, and the first base sleeve and the second base sleeve are detachably connected; the multiple prisms are jointly sleeved on the second base sleeve and are clamped by the first base sleeve and the second base sleeve; the driving mechanism includes a first screw sleeve, a second screw sleeve, a connecting ring and a driving member. The first screw sleeve is arranged on the housing, can rotate around its own 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 jointly sleeved on the second screw sleeve and the first base sleeve, and can both rotate synchronously with the second screw sleeve and drive the first base sleeve to move axially synchronously; the driving member is configured to be able to provide the driving force for the first screw sleeve to rotate around its own axis.

[0008] Further, the prism assembly further includes a lower protective shell, an upper protective shell, a connecting member and two sealing and cleaning rings. The lower protective shell is arranged on the housing, sleeved on the outer periphery of the multiple prisms, and can rotate around the axis of the rotating shaft. The top of the lower protective shell is open; the upper protective shell is sleeved on the outer periphery of the multiple prisms, located above the lower protective shell, and is spaced from the lower protective shell along the axis direction of the rotating shaft. The bottom of the upper protective shell is open; the lower protective shell and the upper protective shell are connected to the second base sleeve through the connecting member; 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 both configured to be able to seal the gap between the prism and the lower protective shell or the upper protective shell and clean the reflecting surface of the prism.

[0009] Further, the prism assembly further includes a flexible sleeve. The flexible sleeve is inserted into the lower protective shell and sleeved on the outer periphery of the rotating shaft. The two ends of the flexible sleeve are respectively sealed on the lower protective shell and the second base sleeve.

[0010] Further, the prism located at the uppermost side has a non-working toroidal surface; the mobile split-type detection radar further includes hooks and slots that are equal in number and each have a plurality. The multiple slots are arranged on the non-working toroidal surface and are arranged circumferentially; the multiple hooks are arranged on the first base sleeve, are arranged circumferentially, and are engaged with the slots.

[0011] Further, when the mobile split detection radar is not working, the non-working toroid is located at the interval between the lower protective case and the upper protective case.

[0012] Further, the prism is a split structure and is circumferentially equally divided into N prism segments, where N is a natural number greater than or equal to three, and adjacent prism segments are snap-connected.

[0013] Further, N is equal to four or five or six or seven.

[0014] Further, there are three prisms; the number of reflecting surfaces of the prism segments on different prisms are one, two, and four respectively.

[0015] Further, when any one of the prisms is working, at every preset time interval, the driving mechanism drives the multiple prisms to slide axially relative to the rotation axis to change the position where the same prism reflects the laser.

[0016] The beneficial effects of the present invention are as follows: During the use of the mobile split detection radar provided by the present invention, when facing a scenario that requires high resolution, the driving mechanism drives the multiple prisms to slide along the axis direction of the rotation axis, so that the prism with a larger number of reflecting surfaces is used to reflect the laser to ensure the detection accuracy; when facing a scenario that requires low resolution, the driving mechanism drives the multiple prisms to slide along the axis direction of the rotation axis, so that the prism with a smaller number of reflecting surfaces is used to reflect the laser. While ensuring the detection accuracy, it can not only reduce the burden of data processing but also reduce the energy consumption.

[0017] Further, by providing that the prism assembly further includes a lower protective case, an upper protective case, a screw rod, and two sealing and cleaning rings, during use, the unused prisms are protected by the lower protective case, the upper protective case, and the two sealing and cleaning rings, reducing the probability of dust, impurities, etc. falling onto the reflecting surfaces of the unused prisms, and further reducing the negative impact on the subsequent reflection accuracy of the prisms due to the presence of dust and impurities on the reflecting surfaces; when the multiple prisms slide, the sealing and cleaning rings can simultaneously clean the reflecting surfaces of the prisms, ensuring that the reflecting surfaces of the prisms are always in a clean state, and further ensuring that the prisms can maintain high precision when reflecting the laser. Description of the Drawings

[0018] Figure 1 is a schematic three-dimensional structure diagram of the mobile split detection radar provided by the first embodiment of the present invention; Figure 2 is a schematic three-dimensional structure diagram of the mobile split detection radar provided by the first embodiment of the present invention with the end caps and the light-transmitting rings removed; Figure 3 is a schematic cross-sectional structure diagram of the mobile split detection radar provided by the first embodiment of the present invention; Figure 4 is Figure 3 the partial enlarged structural schematic diagram at position A in Figure 5 the three-dimensional structural schematic diagram of the prism assembly without the rotating shaft of the mobile split detection radar provided by the first embodiment of the present invention; Figure 6 the sectional structural schematic diagram of the prism assembly without the rotating shaft of the mobile split detection radar provided by the first embodiment of the present invention; Figure 7 the part decomposition schematic diagram of the prism assembly without the rotating shaft of the mobile split detection radar provided by the first embodiment of the present invention; Figure 8 the three-dimensional structural schematic diagram when the second base sleeve and the prism of the mobile split detection radar provided by the second embodiment of the present invention are assembled; Figure 9 the three-dimensional structural schematic diagram when the second base sleeve and the prism of the mobile split detection radar provided by the third embodiment of the present invention are assembled; Figure 10 the three-dimensional structural schematic diagram when the second base sleeve and the prism of the mobile split detection radar provided by the fourth embodiment of the present invention are assembled.

[0019] Wherein: 1. Outer shell; 101. Base; 1011. Chamber; 102. Support plate; 1021. Bracket; 103. Transparent ring; 104. End cover; 1041. Protrusion; 2. Laser emitter; 3. Alignment mirror; 401. Rotating shaft; 402. Prism; 4021. Non-working toroidal surface; 403. First base sleeve; 4031. Slot; 404. Second base sleeve; 405. Lower protective shell; 4051. Support; 4052. Slide block; 406. Upper protective shell; 407. Screw; 408. Sealing and cleaning ring; 409. Flexible sleeve; 5. Driving mechanism; 501. First screw sleeve; 502. Second screw sleeve; 503. Connecting ring; 504. Hollow shaft motor; 6. Transmission mechanism; 601. First driving motor; 602. Turntable; 603. Connecting rod; 7. Second driving motor. Specific embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connected" and "coupled" as used herein, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may 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 being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0023] As Figures 1 to 7 shown, the mobile split detection radar provided by the first embodiment of the present invention is configured to include a housing 1 and a laser emitter 2, a deflecting mirror 3, a prism assembly, a driving mechanism 5, and a receiver that are all inserted into the housing 1; wherein the laser emitter 2 is configured to be able to emit laser light towards the deflecting mirror 3; the deflecting mirror 3 can swing reciprocally around a horizontal axis and is configured to be able to reflect the laser light onto the prism assembly; the prism assembly includes a rotating shaft 401 and a plurality of prisms 402, the rotating shaft 401 is vertically arranged and can rotate around its own axis; a plurality of prisms 402 are all sleeved on the rotating shaft 401, the number of reflecting surfaces of the plurality of prisms 402 is different, the prism 402 is configured to be able to reflect the laser light outside the housing 1, and the plurality of prisms 402 can both synchronously rotate with the rotating shaft 401 to change the reflection angle of the laser light, and can also slide axially relative to the rotating shaft 401 to switch the prism 402 for reflecting the laser light; the driving mechanism 5 is configured to be able to provide the driving force for the sliding of the plurality of prisms 402; the receiver is configured to be able to receive the laser light reflected by an object.

[0024] Specifically in this embodiment, the housing 1 includes a base 101, a support plate 102, a light-transmitting ring 103 and an end cap 104. The base 101 has a chamber 1011 with an open top; the plate surface of the support plate 102 is horizontally arranged and seals the top of the chamber 1011; the axis of the light-transmitting ring 103 extends in the vertical direction and is arranged on the top of the support plate 102; the end cap 104 covers the top of the light-transmitting ring 103. The laser emitter 2 is installed on the top of the support plate 102. To facilitate the installation of the steering mirror 3, a bracket 1021 is provided on the top of the support plate 102, and the steering mirror 3 is rotatably arranged on the bracket 1021 during installation. To facilitate providing the driving force for the rotation of the steering mirror 3, the mobile split-type detection radar is further provided with a transmission mechanism 6. The transmission mechanism 6 includes a first driving motor 601, a turntable 602 and a connecting rod 603. The first driving motor 601 is installed on the top of the support plate 102, and the axis of the motor shaft of the first driving motor 601 is parallel to the rotation axis of the steering mirror 3; the turntable 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 turntable 602, and one end is eccentrically hinged on the disk surface of the turntable 602, and the other end is hinged on the steering mirror 3.

[0025] To facilitate the installation of the rotating shaft 401, a raised portion 1041 is provided on the top of the end cap 104. The raised portion 1041 is arranged as a cylindrical structure with an open bottom. The top end of the rotating shaft 401 is rotatably inserted into the raised portion 1041 during installation, and the bottom end passes through the support plate 102 and is inserted into the chamber 1011; to facilitate providing the driving force for the rotation of the rotating shaft 401, the mobile split-type detection radar is further provided with a second driving motor 7. The second driving motor 7 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.

[0026] During use, when facing complex scenarios with high requirements for scanning resolution, such as high-precision traffic detection in the bustling areas of the city center, where vehicles and pedestrians are dense and the traffic conditions are difficult to predict, it is necessary to accurately obtain detailed information such as the location, speed, and movement trajectory of each target object. At this time, the driving mechanism 5 drives multiple prisms 402 to slide along the axis direction of the rotating shaft 401, so that the prism 402 with a larger number of reflecting surfaces is adjusted to the same horizontal height as the deflecting mirror 3. Then, the laser emitter 2, the first driving motor 601, and the second driving motor 7 are started simultaneously. The laser emitter 2 emits laser light to the deflecting mirror 3. The first driving motor 601 drives the turntable 602 to rotate, and the turntable 602 drives the connecting rod 603 to perform a compound motion. The connecting rod 603 synchronously drives the deflecting mirror 3 to swing reciprocally around the horizontal axis, so that the laser reflected from the prism 402 to the outside of the housing 1 continuously moves within the fan-shaped area in the vertical direction. 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 prism 402 to the outside of the housing 1 continuously moves within the fan-shaped area in the horizontal direction, thereby realizing the all-round detection of the scanning area. Since the prism 402 with a larger number of reflecting surfaces can reflect the laser more carefully and densely, more and denser reflection points are formed by the laser in the scanning area, which can greatly improve the scanning resolution, provide rich and high-precision data for radar detection, and ensure the accuracy of target object detection.

[0027] Conversely, in some scenarios with relatively low requirements for scanning resolution, such as road monitoring in remote areas, where the traffic flow is scarce and the environment is relatively simple, too high a resolution not only cannot fully play its role, but also increases the pressure of data processing and unnecessary consumption of energy. In this case, the driving mechanism 5 drives multiple prisms 402 to slide along the axis direction of the rotating shaft 401, so that the prism 402 with a smaller number of reflecting surfaces is adjusted to the same horizontal height as the deflecting mirror 3. At this time, although the prism 402 with a smaller number of reflecting surfaces has a limited number of reflecting surfaces, it is sufficient to effectively detect the key information such as the position and speed of the target object in the low-resolution scenario. While ensuring the accurate identification of the target object and meeting the basic detection accuracy requirements, the amount of data that the system needs to process is significantly reduced, and the data processing burden is greatly reduced. At the same time, due to the reduction of unnecessary laser emission and complex data processing links, the energy consumption is also reduced accordingly, realizing the efficient use of energy and avoiding energy waste.

[0028] Optionally, the driving mechanism 5 can start working according to a preset scene recognition algorithm or an instruction manually input by the user.

[0029] Further, the prism assembly is arranged to include a first base sleeve 403 and a second base sleeve 404. Both the first base sleeve 403 and the second base sleeve 404 are sleeved on the rotating shaft 401, and both form a sliding key fit with the rotating shaft 401. The first base sleeve 403 and the second base sleeve 404 are detachably connected; a plurality of prisms 402 are jointly sleeved on the second base sleeve 404 and are 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 housing 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 spiral fit with the first screw sleeve 501; the connecting ring 503 is jointly sleeved on the second screw sleeve 502 and the first base sleeve 403, and can both 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 be able to provide a driving force for the first screw sleeve 501 to rotate around its own axis.

[0030] Specifically, both the first base sleeve 403 and the second base sleeve 404 are of an inverted T-shaped structure, 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; to facilitate the realization of the sliding key fit between the first base sleeve 403 and the rotating shaft 401, a first sliding groove is provided on the inner peripheral wall of the first base sleeve 403, and the first sliding groove extends along the axis direction of the first base sleeve 403. A first flat key is inserted on the rotating shaft 401, and the first flat key extends along the axis direction of the rotating shaft 401 and is slidably inserted into the first sliding groove during installation to ensure that the first base sleeve 403 can both move axially relative to the rotating shaft 401 and rotate synchronously with the rotating shaft 401; similarly, to facilitate the realization of the sliding key fit between the second base sleeve 404 and the rotating shaft 401, a second sliding groove is provided on the inner peripheral wall of the second base sleeve 404, and the second sliding groove extends along the axis direction of the second base sleeve 404. A second flat key is inserted on the rotating shaft 401, and the second flat key extends along the axis direction of the rotating shaft 401 and is slidably inserted into the second sliding groove during installation to ensure that the second base sleeve 404 can both move axially relative to the rotating shaft 401 and rotate synchronously with the rotating shaft 401. A plurality of prisms 402 are jointly clamped by the large ends of the first base sleeve 403 and the second base sleeve 404.

[0031] The driving member is set as a hollow shaft motor 504. The hollow shaft motor 504 is inserted into the raised portion 1041, and its axis extends in the vertical direction. The first screw sleeve 501 is fixedly inserted into the hollow shaft of the hollow shaft motor 504 to ensure that it can be driven by the hollow shaft motor 504 to rotate around its own axis. The connecting ring 503 is fixedly sleeved on the bottom of the second screw sleeve 502. A first ring protrusion is provided on the inner peripheral wall of the connecting ring 503, and a first ring groove is provided on the outer peripheral wall of the top of the first base sleeve 403. The first ring protrusion is slidably inserted into the first ring groove during installation to ensure that the second screw sleeve 502 and the first base sleeve 403 can both move axially synchronously and rotate relative to each other.

[0032] During use, the hollow shaft motor 504 is started. The hollow shaft motor 504 drives the first screw sleeve 501 to rotate. The first screw sleeve 501 drives the second screw sleeve 502 to move axially through spiral cooperation. The second screw sleeve 502 synchronously drives the first base sleeve 403, the second base sleeve 404 and multiple prisms 402 to move axially through the connecting ring 503, so that the switching and steering mirror 3 is located at the prism 402 at the same horizontal height.

[0033] Furthermore, to protect and clean the prism 402, the prism assembly is further provided with a lower protective shell 405, an upper protective shell 406, a screw 407 and two sealing and cleaning rings 408. The lower protective shell 405 is arranged on the outer shell 1, sleeved on the outer periphery of multiple 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 periphery of multiple prisms 402, located above the lower protective shell 405, and is spaced from the lower protective shell 405 along the axis direction 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 sleeve 404 through a connecting member; the two sealing and cleaning rings 408 are respectively fixedly inserted at the open top of the lower protective shell 405 and the open bottom of the upper protective shell 406, and are both configured to seal the gap between the prism 402 and the lower protective shell 405 or the upper protective shell 406 and clean the reflecting surface of the prism 402.

[0034] Specifically, both the lower protective case 405 and the upper protective case 406 are cylindrical structures. When installed, the lower protective case 405 penetrates through the support plate 102. An annular support 4051 is provided on the outer peripheral wall of the lower protective case 405. When installed, the support 4051 is slidably pressed against the top of the support plate 102 to ensure that the lower protective case 405 can be supported. The gap between the lower protective case 405 and the upper protective case 406 is at the same horizontal height as the alignment mirror 3, ensuring that the prism 402 can be exposed during use for facilitating the reflection of laser light. The connecting member is set as a screw 407 and a nut. When installed, the screw 407 is arranged parallel to the axis of the rotating shaft 401. Its head is located at the bottom of the lower protective case 405 and forms a stop fit with the lower protective case 405. The rod portion sequentially passes through the lower protective case 405, the second base sleeve 404, the large end of the first base sleeve 403, and the upper protective case 406, and forms a stop fit with the inner top wall of the upper protective case 406 to ensure that the upper protective case 406 can be supported. When installed, the nut is threadedly sleeved on the top of the screw 407 and is located at the top of the upper protective case 406 and forms a stop fit with the upper protective case 406 to ensure that the upper protective case 406 can be fixed.

[0035] Optionally, the number of the screws 407 and the nuts can both be set to be multiple and are evenly arranged in the circumferential direction. In this way, during the entire use process, they can uniformly apply a fastening force to the upper protective case 406 and the lower protective case 405, which is beneficial to ensuring the structural stability.

[0036] Exemplarily, the number of the screws 407 can be set to be two and are arranged with a 180-degree stagger in the circumferential direction; the number of the nuts is correspondingly set to be two and are respectively threadedly sleeved on the tops of the two screws 407.

[0037] Optionally, the sealing and cleaning ring 408 can be made of rubber material.

[0038] During the use process, the lower protective case 405, the upper protective case 406, and the two sealing and cleaning rings 408 jointly construct a relatively enclosed space to protect the unused prism 402. In this way, pollutants such as dust and impurities contained in the external air are difficult to directly fall onto the reflecting surface of the unused prism 402 in most cases, thereby greatly reducing the possibility of negative impacts on the subsequent reflection accuracy of the prism 402 due to the contamination of the reflecting surface by dust and impurities.

[0039] When multiple prisms 402 slide along the axis direction of the rotation axis 401, since the sealing and cleaning ring 408 is made of rubber material, this material has good flexibility and conformability. When the prism 402 slides past the sealing and cleaning ring 408, the sealing and cleaning ring 408 can closely fit at 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, etc. from entering the interior of the protective shell. At the same time, the rubber sealing and cleaning ring 408 can also carefully wipe and clean the reflecting surface of the prism 402. As the prism 402 slides, the sealing and cleaning ring 408 removes dust, stains, and fine impurities accumulated during the previous use on the reflecting surface one by one, ensuring that the reflecting surface of the prism 402 is always in a clean state. Furthermore, it ensures that during the entire working process of the prism 402, it can always reflect laser with high precision, providing a stable and accurate reflection signal for the detection radar, thereby guaranteeing the accuracy and reliability of the detection results of the detection radar.

[0040] Furthermore, to reduce the entry of dust and impurities into the interior of the lower protective shell 405 from the gap between the lower protective shell 405 and the rotation axis 401, thereby contaminating the reflecting surface of the prism 402, it is set that the prism assembly further includes a flexible sleeve 409. The flexible sleeve 409 is inserted into the lower protective shell 405 and sleeved on the outer periphery of the rotation axis 401. Both ends of the flexible sleeve 409 are hermetically arranged on the lower protective shell 405 and the second base sleeve 404 respectively.

[0041] 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 enclose a relatively closed space, thereby effectively reducing the entry of dust and impurities into the lower protective shell 405 from the gap between the lower protective shell 405 and the rotation axis 401, resulting in contamination of the reflecting surface of the prism 402.

[0042] Furthermore, to improve the connection stability between the prism 402 and the first base sleeve 403, it is set that the uppermost prism 402 has a non-working toroidal surface 4021; the mobile split detection radar further includes an equal number of hooks and slots, with multiple slots arranged on the non-working toroidal surface 4021 and arranged circumferentially; multiple hooks are arranged on the first base sleeve 403 and arranged circumferentially, and are engaged with the slots.

[0043] Specifically, the number of hooks can be set to two and arranged evenly circumferentially; the number of slots is correspondingly set to two and arranged evenly circumferentially.

[0044] Further, when the mobile split detection radar is set to be inoperative, the non-operating toroidal surface 4021 is located at the interval between the lower protective housing 405 and the upper protective housing 406. In this way, when the mobile split detection radar is not working, all the prisms 402 can be placed inside the lower protective housing 405, so that all the prisms 402 can be protected, reducing the probability of dust, impurities, etc. falling onto the reflecting surface of the prism 402, and further reducing the negative impact on the subsequent reflection accuracy of the prism 402 due to the presence of dust and impurities on the reflecting surface.

[0045] Further, in a complex and changeable usage environment, it is inevitable that the radar device will encounter various situations that cause the prism 402 to malfunction. Once a problem occurs with the traditional integrated prism 402, it is often necessary to replace the entire prism 402, which is not only costly but also has a cumbersome repair process, resulting in long downtime of the device and seriously affecting work efficiency. To solve this problem, the prism 402 is set to be a split structure and is equally divided into N prism segments along the circumferential direction, where N is a natural number greater than or equal to three, and adjacent prism segments are snap-fitted.

[0046] Specifically in this embodiment, taking N equal to four as an example, the prism 402 is equally divided into four prism segments along the circumferential direction. To achieve the snap-fit between adjacent prism segments, sliding protrusions are provided on both sides of two opposite prism segments. The sliding protrusions extend along the axis direction of the prism 402, and the cross-sectional shape of the sliding protrusions is trapezoidal. Third sliding grooves are provided on both sides of the other two opposite prism segments. The third sliding grooves extend along the axis direction of the prism 402, and the cross-sectional shape of the third sliding grooves is trapezoidal. The sliding protrusions are slidably inserted into the third sliding grooves during installation, so that adjacent prism segments can only be separated axially, and both ends of the prism 402 are blocked by the large ends of the first base sleeve 403 and the second base sleeve 404, thereby improving the structural stability of the prism 402.

[0047] During use, when a certain prism segment fails due to external impact, aging, etc., the split structure of the prism 402 enables the faulty prism segment to be separately disassembled without replacing the entire prism 402, and then a new prism segment can be replaced, which can not only reduce the maintenance cost but also improve the maintenance efficiency.

[0048] Further, the number of prisms 402 can be set to three, and the number of reflecting surfaces of the prism segments of each prism 402 is one, two, and four respectively. At this time, the total number of reflecting surfaces of the three prisms 402 is four, eight, and sixteen respectively.

[0049] Such as Figure 8As shown in the figure, the prism assembly provided by the second embodiment of the present invention is configured to include three prisms 402. Each prism 402 is circumferentially equally divided into five prism sub-mirrors, and the number of reflecting surfaces of the prism sub-mirrors of each prism 402 is one, two, and four respectively. At this time, the total number of reflecting surfaces of the three prisms 402 is five, ten, and twenty respectively.

[0050] As Figure 9 shown in the figure, the prism assembly provided by the third embodiment of the present invention is configured to include three prisms 402. Each prism 402 is circumferentially equally divided into six prism sub-mirrors, and the number of reflecting surfaces of the prism sub-mirrors of each prism 402 is one, two, and four respectively. At this time, the total number of reflecting surfaces of the three prisms 402 is six, twelve, and twenty-four respectively.

[0051] As Figure 10 shown in the figure, the prism assembly provided by the fourth embodiment of the present invention is configured to include three prisms 402. Each prism 402 is circumferentially equally divided into seven prism sub-mirrors, and the number of reflecting surfaces of the prism sub-mirrors of each prism 402 is one, two, and four respectively. At this time, the total number of reflecting surfaces of the three prisms 402 is seven, fourteen, and twenty-eight respectively.

[0052] Through the above settings, the total number of reflecting surfaces of all prisms 402 is different from each other, so that it can adapt to the usage scenarios of the vast majority of resolutions.

[0053] In some other embodiments, when any one of the prisms 402 is working, at every preset time interval, the driving mechanism 5 drives multiple prisms 402 to slide axially relative to the rotating shaft 401 to change the position of the laser reflected by the same prism 402.

[0054] Specifically in this embodiment, such an adjustment mechanism is set because the laser has a high energy density during continuous emission. If it is irradiated on the same position of the same prism 402 for a long time, the position will continuously bear high-energy impacts, which may cause a series of adverse consequences: on the one hand, excessive energy accumulation will cause the local temperature of the prism 402 to rise sharply, and then cause thermal deformation of the material of the prism 402. Once this thermal deformation occurs, the optical structure of the prism 402 will be damaged, and its reflection angle and accuracy of the laser will deviate, directly affecting the accurate measurement of parameters such as the position and speed 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 for 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.

[0055] By adjusting the position of the prism 402 reflecting the laser every preset time interval, the energy of the laser can be dispersed and act on different parts of the prism 402. In this way, it effectively avoids the thermal deformation of the prism 402 caused by excessive heating in a local area, and at the same time reduces the aging loss of the reflective coating at a single position, greatly prolonging the service life of the prism 402. During the entire working process of the detection radar, the good performance of the prism 402 is always maintained, ensuring that the radar can continuously and stably detect the target object with high precision, providing reliable data support for practical applications.

[0056] In some other embodiments, the position of the prism 402 can also be adjusted by manually rotating the first screw sleeve 501. At this time, to facilitate determining whether the prism 402 is adjusted in place, a plurality of slots 4031 are provided on the outer peripheral wall of the small end of the first base sleeve 403. The plurality of slots 4031 are arranged at intervals along the axial direction of the first base sleeve 403. A compression spring and a slider 4052 are inserted inside the top of the lower protective shell 405. The compression spring is horizontally arranged and connected between the slider 4052 and the lower protective shell 405. Under the action of the compression spring, the slider 4052 has a tendency to protrude from the lower protective shell 405, and the slider 4052 can be engaged with the slots 4031.

[0057] During use, when rotating the first screw sleeve 501, when hearing a "click" sound, it indicates that the slider 4052 is inserted into the next slot 4031, and at this time, the prism 402 is located at the interval between the lower protective shell 405 and the upper protective shell 406.

[0058] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0059] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A mobile split detection radar, characterized in that: The mobile split detection radar comprises a housing and a laser transmitter, a steering mirror, a prism assembly, a driving mechanism, and a receiver which are all inserted into the housing; Wherein, the laser transmitter is configured to emit laser light toward the steering mirror; The steering mirror can swing back and forth around a horizontal axis and is configured to reflect the laser onto the prism assembly; The prism assembly includes a rotating shaft and a plurality of prisms, wherein the rotating shaft is vertically arranged and can rotate around its own axis; the plurality of prisms are all sleeved on the rotating shaft, the number of reflection surfaces of the plurality of prisms is different, the prisms are configured to reflect the laser to the outside of the housing, the plurality of prisms can rotate synchronously with the rotating shaft to change the reflection angle of the laser, and can slide axially relative to the rotating shaft to switch the prism used to reflect the laser; The driving mechanism is configured to provide a driving force for sliding the plurality of prisms; The receiver is configured to receive the laser light reflected from an object.

2. The mobile split detection radar according to claim 1 is characterized in that: The prism assembly includes a first base sleeve and a second base sleeve, the first base sleeve and the second base sleeve are both 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 can be detachably connected; the multiple prisms are collectively sleeved on the second base sleeve and clamped by the first base sleeve and the second base sleeve; the driving mechanism includes a first screw sleeve, a second screw sleeve, a connecting ring and a driving member, the first screw sleeve is arranged on the outer shell, can rotate around its own 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 spiral fit with the first screw sleeve; the connecting ring is jointly sleeved on the second screw sleeve and the first base sleeve, and can both rotate synchronously with the second screw sleeve and synchronously drive the first base sleeve to move axially; the driving member is configured to provide a driving force for the first screw sleeve to rotate around its own axis.

3. The mobile split detection radar according to claim 2 is characterized in that: The prism assembly also includes a lower protective shell, an upper protective shell, a connecting piece and two sealing and cleaning rings, wherein the lower protective shell is arranged on the outer shell and is sleeved on the outer periphery of the plurality of prisms and can rotate around the axis of the rotating shaft, and the top of the lower protective shell is open; the upper protective shell is sleeved on the outer periphery of the plurality of prisms and is located above the lower protective shell, and is spaced apart from the lower protective shell along the axial direction of the rotating shaft, and the bottom of the upper protective shell is open; 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 fixedly inserted at the top opening of the lower protective shell and the bottom opening of the upper protective shell, respectively, and are configured to not only seal the gap between the prism and the lower protective shell or the upper protective shell, but also clean the reflecting surface of the prism.

4. The mobile split detection radar according to claim 3 is characterized in that: The prism assembly also includes a flexible sleeve, which is inserted into the lower protective shell and sleeved on the outer periphery of the rotating shaft. The two ends of the flexible sleeve are respectively sealed and arranged on the lower protective shell and the second base sleeve.

5. The mobile split detection radar according to claim 3 is characterized in that: The prism located on the uppermost side has a non-working annular surface; the mobile split detection radar also includes an equal number of hooks and slots, each of which is multiple, and the multiple slots are arranged on the non-working annular surface and arranged along the circumferential direction; the multiple hooks are arranged on the first base sleeve, arranged along the circumferential direction, and are engaged with the slots.

6. The mobile split detection radar according to claim 5, characterized in that: 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.

7. The mobile split detection radar according to claim 1, characterized in that: The prism is a split structure and is equally divided into N prism mirrors along the circumferential direction, where N is a natural number greater than or equal to three, and adjacent prism mirrors are snap-connected.

8. The mobile split detection radar according to claim 7, characterized in that: N is equal to four or five or six or seven.

9. The mobile split detection radar according to claim 8, characterized in that: There are three prisms; the numbers of reflecting surfaces of the prism mirrors on different prisms are one, two and four respectively.

10. The mobile split detection radar according to claim 1, characterized in that: When any of the prisms is working, the driving mechanism drives the plurality of prisms to slide axially relative to the rotating shaft at every preset time interval, so as to change the position where the same prism reflects the laser.

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