A vehicle bottom image acquisition device

Abstract

The embodiment of the present invention discloses a vehicle bottom image acquisition device, which relates to the field of security technology and has a large field of view. The vehicle bottom image acquisition device comprises: a first chamber and an imaging module arranged in the first chamber; a first opening is provided on the wall of the first chamber at a position opposite to the lens of the imaging module, and a prism is provided outside the first opening, and the prism corresponds to the lens of the imaging module. The present invention is suitable for collecting images of the bottom of a vehicle.

Description

Technical Field

[0001] The present invention relates to the field of security technology, and in particular to a vehicle bottom image acquisition device. Background Art

[0002] The underbody image acquisition device is a set of equipment for capturing images of the vehicle chassis. The device can be set up on the road or at the entrance and exit of the vehicle to capture images of the bottom of the vehicle chassis of passing vehicles. The captured images can be processed to identify whether there are any prohibited items hidden under the vehicle.

[0003] In the current underbody image acquisition device, part of the viewing angle of the imaging module is blocked by the housing, resulting in a smaller field of view. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a vehicle bottom image acquisition device having a larger field of view.

[0005] In a first aspect, an embodiment of the present invention provides a vehicle bottom image acquisition device, comprising: a first chamber and an imaging module disposed in the first chamber; a first opening is provided on the wall of the first chamber at a position opposite to the lens of the imaging module, and a prism is provided outside the first opening, and the prism corresponds to the lens of the imaging module.

[0006] In combination with the first aspect, in a first implementation manner of the first aspect, the imaging module is laterally placed in the first chamber, and the first opening is opened on a side wall of the first chamber.

[0007] In combination with the first implementation of the first aspect, in a second implementation of the first aspect, a first light blocking plate is provided on a side of the prism away from the imaging module.

[0008] In combination with the second implementation of the first aspect, in a third implementation of the first aspect, second light blocking plates are provided at both ends of the prism.

[0009] In combination with the third implementation of the first aspect, in a fourth implementation of the first aspect, upper edges at both ends of the prism are higher than an upper edge of the second light blocking plate.

[0010] In combination with the first aspect, in a fifth implementation of the first aspect, a sealing member is provided between an edge of the prism and an edge of the first opening.

[0011] In combination with the first aspect, in a sixth embodiment of the first aspect, a second chamber is provided on the side of the first chamber; a lighting module is provided in the second chamber, and a second opening is opened at a position on the upper surface of the second chamber corresponding to the lighting module; the first chamber and the second chamber are sealed and isolated.

[0012] In combination with the sixth implementation of the first aspect, in a seventh implementation of the first aspect, the second chamber is disposed outside the first side wall of the first chamber, and the first opening is formed on the first side wall.

[0013] In combination with the seventh embodiment of the first aspect, in the eighth embodiment of the first aspect, the first chamber includes a first upper shell and a first lower shell, and the first upper shell cover is arranged on the first lower shell; a first cavity is provided on the first lower shell, the imaging module is provided in the first cavity, the first opening is opened on the side wall of the first cavity, and the prism is provided outside the first opening.

[0014] In combination with the seventh or eighth embodiment of the first aspect, in the ninth embodiment of the first aspect, the second chamber includes a second upper shell and a second lower shell, and the second upper shell cover is arranged on the second lower shell; a second cavity is provided on the second lower shell, and the upper part of the second cavity has an opening, the lighting module is arranged in the second cavity, and the second opening is opened on the second upper shell and corresponds to the opening on the upper part of the second cavity.

[0015] In combination with the eighth embodiment of the first aspect, in the tenth embodiment of the first aspect, a first sealing strip is provided between the first upper shell and the upper edge of the first cavity; and / or a second sealing strip is provided between the second upper shell and the upper edge of the second cavity.

[0016] In combination with the tenth embodiment of the first aspect, in the eleventh embodiment of the first aspect, a first sealing strip groove is provided at the upper edge of the first cavity, and the first sealing strip is arranged in the first sealing strip groove; and / or a second sealing strip groove is provided at the upper edge of the second cavity, and the second sealing strip is arranged in the second sealing strip groove.

[0017] In combination with the ninth implementation of the first aspect, in a twelfth implementation of the first aspect, a surface where the second lower shell and the first lower shell are adjacent to each other is located below the prism.

[0018] In combination with the ninth or twelfth embodiment of the first aspect, in the thirteenth embodiment of the first aspect, the first upper shell and the second upper shell are connected together, and the height dimension of the first upper shell is greater than the height dimension of the second upper shell; a third opening is provided at the connection between the first upper shell and the second upper shell, and the third opening corresponds to the first opening; the prism is located at the third opening.

[0019] In combination with the thirteenth implementation manner of the first aspect, in the fourteenth implementation manner of the first aspect, a third light blocking plate is provided on a side of the prism close to the second opening.

[0020] In combination with the fourteenth implementation manner of the first aspect, in a fifteenth implementation manner of the first aspect, fourth light blocking plates are provided at both ends of the prism.

[0021] In combination with the fifteenth implementation of the first aspect, in a sixteenth implementation of the first aspect, upper edges at both ends of the prism are higher than an upper edge of the fourth light blocking plate.

[0022] In combination with the third implementation manner of the first aspect, in a seventeenth implementation manner of the first aspect, the first light baffle is connected to the second light baffle to form a first groove-shaped structure, and the first groove-shaped structure is transparent from top to bottom; the first groove-shaped structure is connected to the side wall of the first chamber through the second light baffle;

[0023] The prism is located in the first groove-shaped structure, and there is a gap between the prism and the first light-blocking plate and / or the second light-blocking plate.

[0024] In combination with the fifteenth embodiment of the first aspect, in the eighteenth embodiment of the first aspect, the third light baffle is connected to the fourth light baffle and forms a second groove-shaped structure, and the second groove-shaped structure is transparent from top to bottom; the second groove-shaped structure is connected to the first upper shell through the fourth light baffle; the prism is located in the second groove-shaped structure, and there is a gap between the prism and the third baffle and / or the fourth baffle.

[0025] In combination with the first aspect, in a nineteenth embodiment of the first aspect, the imaging module includes a camera and a camera protective cover, the camera is disposed in the camera protective cover, and the camera protective cover is fixed in the first chamber; the camera protective cover has a fourth opening, and the lens of the camera corresponds to the fourth opening; the first opening and the fourth opening correspond to each other.

[0026] In combination with the nineteenth implementation of the first aspect, in a twentieth implementation of the first aspect, a sealing member is provided between an edge of the prism and an edge of the fourth opening.

[0027] In combination with the sixth embodiment of the first aspect, in the twenty-first embodiment of the first aspect, a first vehicle detector and a vehicle speed detector are sequentially provided inside or outside the first chamber along the direction of vehicle travel; a second vehicle detector is provided inside or outside the second chamber on the outside of the lighting module; wherein the first vehicle detector is used to detect whether there is an oncoming vehicle, and generates an oncoming vehicle signal when an oncoming vehicle is detected; the vehicle speed detector is used to detect the driving speed of a passing vehicle; and the second vehicle detector is used to detect whether a vehicle has left, and generates a vehicle leaving signal when a vehicle has left is detected.

[0028] In combination with the sixth implementation of the first aspect, in the twenty-second implementation of the first aspect, a fifth opening is provided on the side of the second chamber at a position corresponding to the lighting module; the fifth opening is communicated with the second opening.

[0029] In combination with the sixth embodiment of the first aspect, in the twenty-third embodiment of the first aspect, the upper surface of the second chamber is lower than the upper surface of the first chamber, and a step is formed between the upper surface of the second chamber and the upper surface of the first chamber; the prism is arranged at the step.

[0030] In the vehicle bottom image acquisition device provided by the embodiment of the present invention, since the prism is arranged outside the first opening, that is, outside the first chamber, it is not blocked by other structural parts, thereby enabling the imaging module to have a larger field of view angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0033] Figure 2 This is a schematic structural diagram of the first upper housing in Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the first lower shell in Embodiment 1 of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the first lower housing with an imaging module in the first embodiment of the present invention;

[0036] Figure 5Schematic diagram of the prism structure in Embodiment 1 of the present invention;

[0037] Figure 6 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure in which the first upper shell and the second upper shell are connected together in the second embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure in which the first lower shell and the second lower shell are connected together in the second embodiment of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure in which the imaging module and the lighting module are respectively arranged in different cavities in the second embodiment of the present invention. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The underbody image acquisition device of this embodiment can be set up at a predetermined road section or entrance and exit to capture images of the underside of vehicles passing over it, and can send the captured images to a management system for analysis to determine whether there are any prohibited items hidden under the vehicle.

[0044] The vehicle bottom image acquisition device of this embodiment may be a mobile vehicle bottom image acquisition device or a fixed vehicle bottom image acquisition device, that is, it may be buried on the road surface where the vehicle passes.

[0045] Embodiment 1

[0046] In this embodiment, the underbody image acquisition device may include functional modules such as an imaging module, a control module and a power module, wherein the imaging module is used to collect images of the underbody, the control module controls the imaging module, and the power module is used to provide power to the imaging module and the control module.

[0047] See also Figures 1 to 3 An embodiment of the vehicle bottom image acquisition device of the present invention includes: a first chamber 1 and an imaging module 2 arranged in the first chamber 1; a first opening 3 is opened on the wall of the first chamber 1 at a position opposite to the lens of the imaging module 2, and a prism 4 is provided outside the first opening 3, and the prism 4 corresponds to the lens of the imaging module 2.

[0048] In this embodiment, since the prism 4 is arranged outside the first opening 3, that is, outside the first chamber 1, it is not blocked by other structural parts, thereby increasing the field of view of the imaging module 2. In practical applications, a theoretical field of view of 180° can be achieved.

[0049] The first chamber 1 may be a box-shaped structure. Figures 2 to 4 In this embodiment, the first chamber 1 may include a first upper shell 11 and a first lower shell 12, and the first upper shell 11 is covered on the first lower shell 12; a first cavity 121 is provided on the first lower shell 12, and the imaging module 2 is provided in the first cavity 121. The first opening 3 is opened on the side wall of the first cavity 121, and the prism 4 is provided outside the first opening 3.

[0050] In order to seal the first cavity 121, a first sealing strip (not shown in the figure) is provided between the first upper shell 11 and the upper edge of the first cavity 121. Specifically, a first sealing strip groove 122 is provided on the upper edge of the first cavity 121, and the first sealing strip is arranged in the first sealing strip groove 122. The first sealing strip groove 122 facilitates the installation, support and positioning of the first sealing strip.

[0051] The imaging module 2 includes a lens and an image sensor. Specifically, the imaging module 2 may be a line array camera, and the line array camera collects images of the bottom of the vehicle according to a predetermined line frequency.

[0052] The prism 4 is an optical device used to change the direction of light, thereby adjusting its imaging position. Figure 5 The prism 4 may include a light incident surface 41, a light emitting surface 42 and a reflection surface 43, and the reflection surface 43 has a predetermined angle with the light incident surface 41 and the light emitting surface 42.

[0053] The imaging module 2 can be placed vertically in the first chamber 1, that is, the optical axis of the lens of the imaging module 2 is vertically upward, and at this time, the prism 4 is located above the lens of the imaging module 2. In this embodiment, the imaging module 2 is placed horizontally in the first chamber 1, and the first opening 3 is opened on the side wall of the first chamber 1. At this time, the prism 4 is located in front of the lens of the imaging module 2. Specifically, the imaging module 2 is placed horizontally in the first chamber 1, which can effectively reduce the height size of the underbody image acquisition device.

[0054] In this embodiment, when the imaging module 2 is placed horizontally, the optical axis of the lens of the imaging module 2 is parallel or nearly parallel to the ground, the light incident surface 41 of the prism 4 faces upward, and the light exit surface 42 is opposite to the lens. Light from the bottom of the vehicle enters the prism 4 through the light incident surface 41 of the prism 4, and enters the imaging module 2 from the light exit surface 42 of the prism 4 after being reflected by the reflection surface 43 of the prism 4. The imaging module 2 can thus capture images of the bottom of the vehicle passing above the underbody image acquisition device.

[0055] When the imaging module 2 is placed horizontally, in order to reduce the light from the side of the prism (such as the reflection surface) entering the prism 4 and affecting the image quality, see Figure 1 A first light baffle 5 is provided on the side of the prism 4 away from the imaging module 2 (such as the reflective surface side). The height of the first light baffle 5 can be greater than or equal to the height of the side surface of the prism 4, so as to fully block the side light from directly entering the prism 4 and affecting the image quality.

[0056] Further, see Figure 1 , a second light baffle 6 may be provided at both ends of the prism 4 to reduce light from both ends of the prism 4 entering the prism 4 and affecting the image quality. The height of the second light baffle 6 may be greater than or equal to the height of the end face of the prism 4. In this embodiment, the height of the second light baffle 6 is less than the height of the end face of the prism 4, so that the upper edges of both ends of the prism 4 are higher than the upper edges of the second light baffle 6, which can increase the field of view of the imaging module 2.

[0057] See also Figure 1 According to an embodiment of the present invention, the first light shielding plate 5 is connected to the second light shielding plate 6 and forms a first groove-shaped structure, the first groove-shaped structure is transparent from top to bottom; the first groove-shaped structure is connected to the side wall of the first chamber through the second light shielding plate 6; the prism 4 is located in the first groove-shaped structure, and there is a gap between the prism 4 and the first light shielding plate 5 and / or the second light shielding plate 6. On rainy days, when rain falls on the prism 4, it can flow away smoothly from the first groove-shaped structure, avoiding the formation of water accumulation at the prism to further penetrate into the imaging module.

[0058] The first light baffle and the second light baffle may be connected to the first lower housing 12, specifically, the second light baffle 6 is connected to the first lower housing 12, and the first light baffle 5 is connected to the second light baffle 6. The present invention is not limited thereto, the first light baffle and the second light baffle may also be connected to the first upper housing 11, specifically, the second light baffle 6 is connected to the first upper housing 11, and the first light baffle 5 is connected to the second light baffle 6.

[0059] In one embodiment, a seal is provided between the edge of the prism 4 and the edge of the first opening 3 to prevent rain or dust from entering the first chamber 1 through the first opening 3 and causing adverse effects on components such as the imaging module 2 therein.

[0060] Embodiment 2

[0061] In this embodiment, the vehicle bottom image acquisition device may include functional modules such as an imaging module, a lighting module, a control module, and a power module, wherein the imaging module is used to acquire images of the vehicle bottom, the lighting module is used to fill in the bottom of the vehicle so that the imaging module can acquire clear vehicle bottom images, the control module controls the imaging module and the lighting module, and the power module is used to provide power to the imaging module, the lighting module, and the control module.

[0062] See also Figures 6 to 9 , This embodiment provides a vehicle bottom image acquisition device, comprising: a first chamber 1 and an imaging module 2 arranged in the first chamber 1; a first opening 3 is provided on the wall of the first chamber 1 at a position opposite to the lens of the imaging module 2, a prism 4 is provided outside the first opening 3, and the prism 4 corresponds to the lens of the imaging module 2; a second chamber 7 is provided on the side of the first chamber 1; a lighting module 8 is provided in the second chamber 7, and a second opening 9 is provided on the upper surface of the second chamber 7 at a position corresponding to the lighting module 8; the first chamber 1 and the second chamber 7 are sealed and isolated.

[0063] In this embodiment, since the prism 4 is arranged outside the first opening 3, that is, outside the first chamber 1, it is not blocked by other structural parts, thereby increasing the field of view of the imaging module 2. In practical applications, a theoretical field of view of 180° can be achieved. Furthermore, the imaging module 2 is arranged in the first chamber 1, the lighting module 8 is arranged in the second chamber 7, and the first chamber 1 and the second chamber 7 are sealed and isolated, which can enhance the overall protection capability of the underbody image acquisition device and avoid the situation where a problem with the sealing of a chamber will cause water leakage in other chambers.

[0064] See also Figure 6 According to one embodiment of the present invention, a fifth opening 9' is provided on the side of the second chamber 7 at a position corresponding to the lighting module 8; the fifth opening 9' is connected to the second opening 9, which can further increase the lighting angle and lighting range.

[0065] The second chamber 7 can be arranged outside the first side wall of the first chamber 1, and the first opening 3 is opened on the first side wall, so that the lighting module 8 is arranged close to the prism 4, which is conducive to enhancing the fill light effect and improving the image capture quality.

[0066] See also Figure 6 According to one embodiment of the present invention, the upper surface of the second chamber 7 is lower than the upper surface of the first chamber 1, and a step is formed between the upper surface of the second chamber 7 and the upper surface of the first chamber 1; the prism 4 is arranged at the step.

[0067] See also Figures 7 to 9 In this embodiment, the first chamber 1 may include a first upper shell 11 and a first lower shell 12, and the first upper shell 11 is covered on the first lower shell 12; a first cavity 121 is provided on the first lower shell 12, and the imaging module 2 is provided in the first cavity 121. The first opening 3 is opened on the side wall of the first cavity 121, and the prism 4 is provided outside the first opening 3.

[0068] In order to seal the first cavity 121, a first sealing strip (not shown in the figure) is provided between the first upper shell 11 and the upper edge of the first cavity 121. Specifically, a first sealing strip groove 122 is provided on the upper edge of the first cavity 121, and the first sealing strip is arranged in the first sealing strip groove 122. The first sealing strip groove 122 facilitates the installation, support and positioning of the first sealing strip.

[0069] See also Figures 7 to 9 The second chamber 7 may adopt a structure similar to that of the first chamber 1. Specifically, the second chamber 7 may include a second upper shell 71 and a second lower shell 72. The second upper shell 71 is covered on the second lower shell 72. The second lower shell 72 is provided with a second cavity 721. The upper portion of the second cavity 721 has an opening. The lighting module 8 is provided in the second cavity 721. The second opening 9 and the fifth opening 9' are provided on the second upper shell 71 and correspond to the opening on the upper portion of the second cavity 721.

[0070] In order to seal the second cavity 721, a second sealing strip (not shown in the figure) is provided between the second upper shell 71 and the upper edge of the second cavity 721. Specifically, a second sealing strip groove 722 is provided on the upper edge of the second cavity 721, and the second sealing strip is arranged in the second sealing strip groove 722. The second sealing strip groove 722 facilitates the installation, support and positioning of the second sealing strip.

[0071] The first lower shell 12 and the second lower shell 72 are connected together, and the height dimension of the first upper shell 11 is greater than the height dimension of the second upper shell 71. In this way, a height difference can be formed between the first upper shell 11 and the second upper shell 71, which is beneficial to provide protection for the lighting module 8 in the second lower shell 72 and reduce the direct crushing of the lighting module 8 by the vehicle.

[0072] Furthermore, the surface of the second lower shell 72 adjacent to the first lower shell 12 can be located below the prism 4, so that on rainy days, rainwater entering the second lower shell 72 from the prism 4 can flow away from the adjacent portion of the second lower shell 72 and the first lower shell 12, and will not enter the second cavity 721. Preferably, a groove can be provided at the adjacent portion of the second lower shell 72 and the first lower shell 12, so that rainwater entering the second lower shell 72 from the prism 4 can flow away smoothly.

[0073] The first upper shell 11 and the second upper shell 71 can be separate structures. In this embodiment, in order to increase the stability of the overall structure and facilitate the rapid installation or removal of the upper shell, see Figure 7 The first upper shell 11 and the second upper shell 71 are connected together to form an integrated structure. The height dimension of the first upper shell 11 is greater than the height dimension of the second upper shell 71 to accommodate the height difference between the first lower shell 12 and the second lower shell 72.

[0074] A third opening 10 is provided at the connection between the first upper shell 11 and the second upper shell 71 . The third opening 10 is partially provided on the first upper shell 11 and partially provided on the second upper shell 71 . The third opening 10 corresponds to the first opening 3 . The prism 4 is located at the third opening 10 .

[0075] The prism 4 is an optical device used to change the direction of light, thereby adjusting its imaging position. Figure 5 The prism 4 may include a light incident surface 41, a light emitting surface 42 and a reflection surface 43, and the reflection surface 43 has a predetermined angle with the light incident surface 41 and the light emitting surface 42.

[0076] In order to reduce the light emitted by the illumination module 8 from entering the prism 4 from the side (such as the reflection surface) of the prism 4 and affecting the image quality, see Figure 6 A third light baffle 31 is provided on the side of the prism 4 close to the second opening 9 (such as the side of the reflective surface). The height of the third light baffle 31 can be greater than or equal to the height of the side of the prism 4, so as to fully block the light emitted by the lighting module 8 from directly entering the prism 4 and affecting the image quality.

[0077] Furthermore, fourth light blocking plates 32 may be provided at both ends of the prism 4 to reduce light from entering the prism 4 from both ends of the prism 4 and affecting the image quality.

[0078] The height of the fourth light baffle 32 may be greater than or equal to the height of the end face of the prism 4. In this embodiment, the height of the fourth light baffle 32 is less than the height of the end face of the prism 4, so that the upper edges of both ends of the prism 4 are higher than the upper edges of the fourth light baffle 32, which can increase the field of view of the imaging module 2.

[0079] The third light baffle 31 and the fourth light baffle 32 may be connected to the first upper shell 11 . Specifically, the fourth light baffle 32 is connected to the first upper shell 11 , and the third light baffle 31 is connected to the fourth light baffle 32 .

[0080] See also Figure 6 According to an embodiment of the present invention, the third light baffle 31 is connected to the fourth light baffle 32 and forms a second groove-shaped structure, the second groove-shaped structure is transparent from top to bottom; the second groove-shaped structure is connected to the first upper housing 11 through the fourth light baffle 31; the prism 4 is located in the second groove-shaped structure, and there is a gap between the prism 4 and the third baffle 31 and / or the fourth baffle 32. On rainy days, when rain falls on the prism 4, it can flow away smoothly from the second groove-shaped structure, avoiding the formation of water accumulation at the prism 4 to further penetrate into the imaging module.

[0081] See also Fig. 9 According to one embodiment of the present invention, the imaging module 2 includes a camera (not shown in the figure) and a camera protective cover 21, wherein the camera is arranged in the camera protective cover 21, and the camera protective cover 21 is fixed in the first chamber 1; the camera protective cover 21 has a fourth opening (not shown in the figure), and the lens of the camera corresponds to the fourth opening; the first opening 3 corresponds to the fourth opening. The fourth opening may be a long and narrow opening, and the prism 4 is a long strip, which can be installed at the fourth opening by bonding. The first chamber 1 can provide protection for the camera, and the camera protective cover 21 can provide further protection for the camera, so that even if rainwater enters the first chamber 1, it will not have a direct adverse effect on the camera located in the camera protective cover 21.

[0082] Furthermore, a sealing member may be provided between the edge of the prism and the edge of the fourth opening. The prism may be bonded to the fourth opening by means of a colloid, and the colloid itself may also play a sealing role.

[0083] The camera includes a lens and an image sensor. Specifically, the camera may be a line array camera, and the line array camera collects images of the bottom of the vehicle according to a predetermined line frequency.

[0084] The lighting module 8 may include an LED (Light Emitting Diode) lamp for supplementing light to the bottom of the vehicle so that the imaging module 2 can capture a clear image of the bottom of the vehicle.

[0085] See also Figure 6 According to one embodiment of the present invention, a first vehicle detector 13 and a vehicle speed detector 14 are sequentially provided inside or outside the first chamber 1 along the vehicle driving direction; a second vehicle detector 15 is provided on the outer side of the lighting module 8 inside or outside the second chamber 7; wherein the first vehicle detector 13 is used to detect whether there is an oncoming vehicle, and generates an oncoming vehicle signal when an oncoming vehicle is detected; the vehicle speed detector 14 is used to detect the driving speed of a passing vehicle; the second vehicle detector 15 is used to detect whether there is a vehicle leaving, and generates a vehicle leaving signal when a vehicle leaving is detected.

[0086] As an optional implementation, the vehicle speed detector can detect the speed of the vehicle according to the vehicle approaching signal generated by the first vehicle detector, the control unit can determine the line frequency of the linear camera for image acquisition according to the speed of the vehicle, and the line array camera can acquire images of the bottom of the vehicle according to the line frequency. When the second vehicle detector detects that the vehicle has left, it sends a vehicle leaving signal, and according to this information, the vehicle speed detector stops measuring the speed, the line array camera stops acquiring images, and the lighting unit stops lighting.

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0088] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0089] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A vehicle bottom image acquisition device, characterized in that: include: a first chamber and an imaging module disposed in the first chamber; A first opening is provided on the wall of the first chamber at a position opposite to the lens of the imaging module, and a prism is provided outside the first opening, wherein the prism corresponds to the lens of the imaging module; A third light baffle is provided on a side of the prism away from the imaging module, a second chamber is provided on a side of the first chamber, and the first chamber and the second chamber are sealed and isolated; A fourth light-blocking plate is provided at both ends of the prism, and upper edges of both ends of the prism are higher than the upper edge of the fourth light-blocking plate; The third light baffle is connected to the fourth light baffle to form a first slot-shaped structure, the first slot-shaped structure is transparent from top to bottom; the first slot-shaped structure is connected to the side wall of the first chamber through the fourth light baffle; The prism is located in the first groove-shaped structure, and there is a gap between the prism and the third light-blocking plate and / or the fourth light-blocking plate; The first chamber comprises a first upper shell and a first lower shell, wherein the first upper shell cover is disposed on the first lower shell; The second chamber comprises a second upper shell and a second lower shell, wherein the second upper shell cover is disposed on the second lower shell; The height dimension of the first upper shell is greater than the height dimension of the second upper shell, and the surface where the second lower shell adjoins the first lower shell is located below the prism.

2. The vehicle bottom image acquisition device according to claim 1, characterized in that: The imaging module is placed transversely in the first chamber, and the first opening is opened on the side wall of the first chamber.

3. The vehicle bottom image acquisition device according to claim 1, characterized in that: A seal is provided between an edge of the prism and an edge of the first opening.

4. The vehicle bottom image acquisition device according to claim 1, characterized in that: A lighting module is arranged in the second cavity, and a second opening is opened at a position on the upper surface of the second cavity corresponding to the lighting module.

5. The vehicle bottom image acquisition device according to claim 4, characterized in that: The second chamber is arranged outside the first side wall of the first chamber, and the first opening is formed on the first side wall.

6. The vehicle bottom image acquisition device according to claim 5, characterized in that: The first upper shell cover is arranged on the first lower shell; A first cavity is provided on the first lower shell, the imaging module is provided in the first cavity, the first opening is opened on the side wall of the first cavity, and the prism is provided outside the first opening.

7. The vehicle bottom image acquisition device according to claim 6, characterized in that: The second lower shell is provided with a second cavity, the upper portion of the second cavity has an opening, the lighting module is provided in the second cavity, the second opening is provided on the second upper shell and corresponds to the opening of the upper portion of the second cavity.

8. The vehicle bottom image acquisition device according to claim 7, characterized in that: A first sealing strip is provided between the first upper shell and the upper edge of the first cavity; and / or, A second sealing strip is provided between the second upper shell and the upper edge of the second cavity.

9. The vehicle bottom image acquisition device according to claim 8, characterized in that: A first sealing strip groove is provided on the upper edge of the first cavity, and the first sealing strip is provided in the first sealing strip groove; and / or, A second sealing strip groove is provided on the upper edge of the second cavity, and the second sealing strip is provided in the second sealing strip groove.

10. The vehicle bottom image acquisition device according to claim 7, characterized in that: A surface where the second lower shell is adjacent to the first lower shell is located below the prism.

11. The vehicle bottom image acquisition device according to claim 7, characterized in that: The first upper shell and the second upper shell are connected together, and the height dimension of the first upper shell is greater than the height dimension of the second upper shell; A third opening is provided at the connection between the first upper shell and the second upper shell, and the third opening corresponds to the first opening; The prism is located at the third opening.

12. The vehicle bottom image acquisition device according to claim 1, characterized in that: The imaging module comprises a camera and a camera protective cover, wherein the camera is arranged in the camera protective cover, and the camera protective cover is fixed in the first chamber; The camera protective cover has a fourth opening, and the lens of the camera corresponds to the fourth opening; The first opening corresponds to the fourth opening.

13. The vehicle bottom image acquisition device according to claim 12, characterized in that: A sealing member is provided between an edge of the prism and an edge of the fourth opening.

14. The vehicle bottom image acquisition device according to claim 4, characterized in that: Inside or outside the first chamber, a first vehicle detector and a vehicle speed detector are sequentially arranged along the vehicle travel direction; A second vehicle detector is provided inside or outside the second chamber and outside the lighting module; Wherein, the first vehicle detector is used to detect whether there is an oncoming vehicle and generate an oncoming vehicle signal when an oncoming vehicle is detected; The vehicle speed detector is used to detect the speed of a passing vehicle; The second vehicle detector is used to detect whether a vehicle leaves, and generate a vehicle leaving signal when the vehicle leaves.

15. The vehicle bottom image acquisition device according to claim 4, characterized in that: A fifth opening is provided on the side surface of the second cavity at a position corresponding to the lighting module; the fifth opening is communicated with the second opening.

16. The vehicle bottom image acquisition device according to claim 4, characterized in that: The upper surface of the second chamber is lower than the upper surface of the first chamber, and a step is formed between the upper surface of the second chamber and the upper surface of the first chamber; the prism is arranged at the step.

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