Hidden license plate detection device applied to roadside parking charging system

Abstract

The invention relates to a hidden license plate detection device applied to a roadside parking charging system, which comprises a sealed shell, a movable seat, a guide channel and a driving mechanism for driving the movable seat to move along the guide channel are arranged in the sealed shell, and a lifting seat and a lifting mechanism for driving the lifting seat to lift are arranged above the movable seat. A rotating seat and a rotating mechanism for driving the rotating seat to rotate are arranged above the lifting seat, the rotating seat is provided with a camera and a swinging mechanism for driving the camera to swing up and down, and the sealing shell is provided with a movable power supply mechanism for supplying power to electric components on the movable seat when the movable seat moves longitudinally. A plurality of identification ports and a sealing mechanism for closing the identification ports after the camera returns to the sealing shell are arranged above the sealing shell, and electromagnetic inductors for identifying the parking of the vehicle are arranged between the adjacent identification ports above the sealing shell. By the adoption of the scheme, the hidden license plate detection device applied to the roadside parking charging system can stably recognize the license plate number.

Description

Technical Field

[0001] The invention relates to the field of parking fee collection, and in particular to a hidden license plate detection device applied to a parking fee collection system. Background Art

[0002] The roadside parking fee collection system is a common automated fee collection system. After the vehicle is parked in a designated parking space on the side of the road, a camera located at a high altitude will identify the license plate number of the corresponding parking space, and the control center will then record the parking time. Before the vehicle leaves, the corresponding parking fee can be paid through unattended payment methods (scanning code, swiping card, etc.), thus eliminating the inconvenience caused by manual supervision.

[0003] However, the above-mentioned roadside parking fee collection system has certain drawbacks. That is, during the camera recognition process, the camera's field of view will be blocked due to the close distance between adjacent vehicles, making it impossible to recognize. Staff are required to go there manually to transcribe, which runs counter to the original intention of setting up the system. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a hidden license plate detection device for use in a roadside parking fee collection system and capable of stably identifying license plate numbers.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a sealed shell buried under the parking space, wherein a guide channel for the longitudinal movement of the movable seat and a driving mechanism for driving the movable seat to move along the guide channel are arranged in the sealed shell, a lifting seat and a lifting mechanism for driving the lifting seat to lift and lower are arranged above the movable seat, a rotating seat and a rotating mechanism for driving the rotating seat to rotate are arranged above the lifting seat, a camera and a swinging mechanism for driving the camera to swing up and down are arranged on the rotating seat, the sealed shell is provided with an active power supply mechanism for supplying power to the electrical components on the movable seat when the movable seat moves longitudinally, a plurality of identification ports for the camera to extend out of the sealed shell are equidistantly arranged longitudinally above the sealed shell, and a sealing mechanism for closing the identification ports after the camera returns to the sealed shell, and an electromagnetic sensor for identifying the vehicle stopping is arranged between adjacent identification ports above the sealed shell.

[0006] By adopting the above technical solution, during construction, the sealed shell is pre-buried under multiple consecutive parking spaces, the position of the electromagnetic sensor is aligned with the center and bottom of the parking space, and the position of the identification port is aligned with the connection between adjacent parking spaces. When the car stops in one of the parking spaces, the corresponding electromagnetic sensor will detect that the car has stopped. After stopping for a certain period of time, the driving mechanism drives the movable seat to move longitudinally to the bottom of the identification port at the front or rear of the car, and the lifting mechanism drives the lifting seat to rise until the camera extends from the identification port, identifies the license plate at the front or rear of the car, and transmits the identified information to the control center. During this period, accurate identification can be ensured by rotating the camera and swinging the camera up and down. After the identification is completed, the sealing mechanism will close the identification port in time to restore the sealed environment in the sealed shell. The above structure has the following advantages: ① The recognition method of traditional high-altitude recognition is changed, and the recognition position is adjusted to the head and tail of the parking space, that is, the position closest to the license plate, which greatly improves the recognition efficiency and recognition effect, and cooperates with the rotation and swing function of the camera to further improve the recognition effect; ② Since the detection device is installed underground, it will not be restricted by road conditions (sidewalks are too narrow, there are walls, etc.) to increase the difficulty of installation, thereby greatly increasing the scope of application, and will not be blocked by road facilities (trees, transformer boxes, traffic lights, etc.) to the camera's field of view. Accordingly, a larger walking space is reserved for pedestrians; ③ The hidden structural design, the camera that quickly recognizes the license plate immediately returns to the sealed shell after the recognition is completed to avoid damage to the camera, and the vehicles parked before and after during the recognition process will also protect the camera, further ensuring the stable operation of the device, and the sealing mechanism not only has the function of closing the recognition port, but also serves as a sealing barrier for the recognition port to prevent water from entering the sealed shell and causing failures; ④ The movable power supply mechanism effectively ensures that when the movable seat moves a long distance, the electrical components on it can also have a stable power supply.

[0007] The present invention is further configured as follows: the driving mechanism includes a motor chamber fixed to the longitudinal end of the sealed shell, a servo motor is arranged in the motor chamber, the servo motor is longitudinally driven and is provided with a driving screw rod extending into the guide channel and rotatably cooperating with the longitudinal end of the sealed shell, the driving screw rod passes through the movable seat and is threadedly cooperating with the movable seat.

[0008] By adopting the above technical solution, the independently sealed motor room provides the servo motor with a stable and dry working environment, ensuring that it can operate stably for a long time. When the servo motor drives the screw to rotate, the movable seat can be accurately controlled to be relative to different identification ports, ensuring that the camera can stably extend out of the identification port for identification.

[0009] The present invention is further configured as follows: the movable power supply mechanism includes a power supply chamber arranged longitudinally on the side of the sealed shell, the power supply chamber is provided with a power supply port connected to the guide channel along the longitudinal direction, the movable seat is provided with a power supply block passing through the power supply port and longitudinally slidingly cooperating with the power supply chamber, the end surface of the power supply block facing the power supply chamber is provided with a plurality of power supply contacts arranged vertically and electrically connected to electrical components, the power supply chamber corresponds to each power supply contact and is provided with a power supply strip electrically connected to an external power supply along the longitudinal direction, and the power supply contacts and the power supply strip constitute power supply cooperation when they are abutted against each other.

[0010] By adopting the above technical solution, during installation, the external power supply is connected to the power supply bar and the components on the movable seat that require electrical energy are connected to the power supply contacts. Since the power supply bar is arranged longitudinally, when the movable seat moves longitudinally, the power supply contacts of the movable seat always maintain an abutment state with the corresponding power supply bar, thereby ensuring stable power supply coordination. In addition, the power supply structure can not only be used for power supply circuits, but also for information transmission circuits.

[0011] The present invention is further configured as follows: the power supply block corresponds to each power supply contact and is provided with a stabilizing hole along the horizontal direction; the power supply contact includes a hemispherical portion abutting against the power supply bar and a cylindrical portion slidingly matched with the stabilizing hole; a stabilizing spring is compressed between the stabilizing hole and the cylindrical portion to reset the hemispherical portion to the power supply bar.

[0012] By adopting the above technical solution, the stabilizing hole cooperates with the cylindrical part to enable the power supply contact to move stably laterally, and the stabilizing spring keeps the hemispherical part against the power supply bar at all times, thereby making the power supply cooperation more stable. Even if the power supply contact is worn, the spacing can be automatically compensated.

[0013] The present invention is further configured as follows: the lifting mechanism comprises electric cylinders respectively arranged on both sides of the movable seat in the horizontal direction; the electric cylinders are driven above an electric rod fixed to the bottom of the lifting seat; the rotating mechanism comprises a rotating motor fixed below the lifting seat; the rotating motor is driven above a motor shaft passing through the lifting seat and cooperating with the rotating seat for rotation; the swing mechanism comprises swing seats located on both sides of the camera and cooperating with the camera for rotation; one of the swing seats is provided with a swing motor for driving the camera to swing vertically.

[0014] By adopting the above technical scheme, the space on both sides of the movable seat is reasonably utilized to arrange the electric cylinder that drives the lifting seat to rise and fall, and the space below the lifting seat is reasonably utilized to arrange the rotating motor that drives the rotating seat to rotate. The swing seats on both sides make the camera swing stably, and one of the swing seats is used to arrange the swing motor that drives the camera to swing vertically. In summary, the stable operation of the device is ensured while the structure is more streamlined.

[0015] The present invention is further configured as follows: a retreat groove for retreating the rotating motor is provided above the movable seat.

[0016] By adopting the above technical solution and adding the retreat groove, the lifting seat can be closer to the movable seat when descending, thereby increasing the structural compactness of the device.

[0017] The present invention is further configured as follows: the sealing mechanism comprises a sealing seat and a sealing plate, the sealing seat is fixed above the sealing shell, the identification port is located at the top of the sealing seat, the sealing seat is located below the identification port and is vertically provided with a sealing channel connected to the guide channel, the sealing plate is located above the sealing seat and is sealed with the upper part of the sealing seat, a plurality of guide rods are provided at the lower edge of the sealing plate, the sealing seat and each guide rod are correspondingly provided with guide holes for vertical sliding cooperation, a reset hole with a diameter larger than the guide hole is provided below the guide hole, a reset step is formed at the junction of the reset hole and the guide hole, a reset disk is provided at the lower end of the guide rod and is vertically slidably cooperates with the reset hole, the guide rod sleeve is provided with a reset spring compressed above the reset disk and the reset step, the rotating seat is located above the camera and is provided with a lifting plate that cooperates with the sealing plate for lifting, and a plurality of columns that are fixedly cooperated with the rotating seat are provided below the lifting plate.

[0018] By adopting the above technical solution, when identification is required, the electric cylinder drives the lifting seat to rise, thereby driving the lifting plate to pass through the sealing channel to lift the sealing plate, and the camera located under the lifting plate extends out of the identification port for identification. At this time, the reset spring is in a compressed state; when the identification is completed, the electric cylinder drives the lifting seat to descend, the lifting plate returns to the guide channel, and the reset spring returns to its original state, driving the sealing plate to descend and restore the sealing cooperation state with the sealing seat.

[0019] The present invention is further configured as follows: a pressure sensor is arranged above the jacking plate.

[0020] By adopting the above technical solution, when a heavy object covers the sealing plate, the lifting plate cannot lift the sealing plate. When the pressure sensor above the lifting plate exceeds the set pressure value, the lifting plate drops and moves to the adjacent identification port to identify the other license plate of the vehicle staying above (such as identifying the rear license plate when the front license plate recognition fails), thereby avoiding damage to the device due to excessive lifting pressure and making the identification function more intelligent.

[0021] The present invention is further configured as follows: a guiding chamfer is provided along the edge of the lower end of the sealing channel for guiding the lifting plate to enter the sealing channel.

[0022] By adopting the above technical solution and adding a guide chamfer, the position of the jacking plate is guided before it enters the sealing channel, ensuring that it can accurately enter the sealing channel that cooperates with its vertical sliding, thereby ensuring the stable operation of the device.

[0023] The present invention is further configured as follows: a drainage enclosure is arranged above the sealing shell around the sealing seat, a drainage ramp is arranged between the outer periphery of the sealing seat and the inner periphery of the drainage enclosure and the height gradually decreases in the direction away from the sealing seat, and the sealing shell is located below the drainage enclosure and is vertically provided with a drainage pipe connected to the lowest point inside the drainage enclosure.

[0024] By adopting the above technical scheme, in order to prevent the accumulated water on the road from flooding the identification port and causing the accumulated water to flow into the sealing shell when the sealing plate rises, a drainage enclosure is set on the outer periphery of the sealing seat, and the drainage ramp is used to guide the accumulated water to the lowest point inside the drainage enclosure, and then discharged into the soil or sewer pipe through the drainage pipe, thereby ensuring the stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structure of a specific embodiment of the present invention Figure 1 ;

[0026] Figure 2 A three-dimensional structure of a specific embodiment of the present invention Figure 2 ;

[0027] Figure 3 is a schematic diagram of the internal structure of the sealed housing;

[0028] Figure 4 for Figure 3 A magnified view of middle;

[0029] Figure 5 It is a cross-sectional view of a non-recognition state of a specific embodiment of the present invention;

[0030] Figure 6 A cross-sectional view of an identification state of a specific embodiment of the present invention;

[0031] Figure 7 A diagonal cross-sectional view of the seal seat. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] like Figure 1 — Figure 7As shown, the present invention discloses a hidden license plate detection device applied to a roadside parking fee collection system, comprising a sealed shell 1 buried under a parking space, wherein a movable seat 2, a guide channel 11 for the movable seat 2 to move longitudinally, and a driving mechanism for driving the movable seat 2 to move along the guide channel 11 are arranged in the sealed shell 1, a lifting seat 3 and a lifting mechanism for driving the lifting seat 3 to lift are arranged above the movable seat 2, a rotating seat 4 and a rotating mechanism for driving the rotating seat 4 to rotate are arranged above the lifting seat 3, a camera 5 and a swinging mechanism for driving the camera 5 to swing up and down are arranged on the rotating seat 4, the sealed shell 1 is provided with an active power supply mechanism for supplying power to electrical components on the movable seat 2 when the movable seat 2 moves longitudinally, a plurality of identification openings 12 for the camera 5 to extend out of the sealed shell 1 and a sealing mechanism for closing the identification opening 12 after the camera 5 returns to the sealed shell 1 are equidistantly arranged longitudinally above the sealed shell 1, and the sealing mechanism is provided to seal the sealing mechanism. An electromagnetic sensor 6 for identifying vehicle parking is provided above the shell 1 and between adjacent identification ports 12. During construction, the sealed shell 1 is pre-buried under a plurality of consecutive parking spaces, and the position of the electromagnetic sensor 6 corresponds to the center and bottom of the parking space, and the position of the identification port 12 corresponds to the junction of adjacent parking spaces. When the car stops in one of the parking spaces, the corresponding electromagnetic sensor 6 will detect that the car has stopped. After stopping for a certain period of time, the driving mechanism drives the movable seat 2 to move longitudinally to the bottom of the identification port 12 located at the front or rear of the car, and the lifting mechanism drives the lifting seat 3 to rise until the camera 5 extends from the identification port 12 to identify the license plate at the front or rear of the car and transmit the identification information to the control center. During this period, accurate identification can be ensured by rotating the camera 5 and swinging the camera 5 up and down. After the identification is completed, the sealing mechanism closes the identification port 12 in time to restore the sealed environment in the sealed shell 1. The above structure has the following advantages: ① The recognition method of traditional high-altitude recognition is changed, and the recognition position is adjusted to the head and tail of the parking space, that is, the position closest to the license plate, which greatly improves the recognition efficiency and recognition effect, and cooperates with the rotation and swing function of the camera 5 to further improve the recognition effect; ② Since the detection device is installed underground, it will not be restricted by road conditions (sidewalks are too narrow, there are walls, etc.) to increase the difficulty of installation, thereby greatly increasing the scope of application, and will not be hindered by road facilities (trees, transformer boxes, traffic lights, etc.) to the field of view of the camera 5. Accordingly, a larger walking space is reserved for pedestrians; ③ The hidden structural design, the camera 5 that quickly recognizes the license plate returns to the sealed housing 1 immediately after the recognition is completed, to avoid damage to the camera 5, and the vehicles parked before and after during the recognition process will also protect the camera 5, further ensuring the stable operation of the device, and the sealing mechanism not only has the function of closing the recognition port 12, but also serves as a sealing barrier for the recognition port 12 to prevent water from entering the sealed housing 1 and causing failures; ④ The movable power supply mechanism effectively ensures that when the movable seat 2 moves a long distance, the electrical components thereon can also have a stable power supply.

[0035] The driving mechanism includes a motor chamber 13 fixed to the longitudinal end of the sealed shell 1, and a servo motor 14 is arranged in the motor chamber 13. The servo motor 14 is longitudinally driven and is provided with a driving screw 141 which extends into the guide channel 11 and rotates with the longitudinal end of the sealed shell 1. The driving screw 141 passes through the movable seat 2 and is threadedly matched with the movable seat 2. The independently sealed motor chamber 13 provides the servo motor 14 with a stable and dry working environment to ensure that it can operate stably for a long time. When the driving screw 141 is driven to rotate by the servo motor 14, the movable seat 2 can be accurately controlled to be relative to different identification ports 12, to ensure that the camera 5 can stably extend out of the identification port 12 for identification.

[0036] The movable power supply mechanism includes a power supply chamber 15 arranged longitudinally on the side of the sealed shell 1, the power supply chamber 15 is provided with a power supply port 151 connected to the guide channel 11 along the longitudinal direction, the movable seat 2 is provided with a power supply block 23 passing through the power supply port 151 and slidingly cooperating with the power supply chamber 15 in the longitudinal direction, and the end surface of the power supply block 31 facing the power supply chamber 15 is provided with a plurality of power supply contacts 231 arranged vertically and electrically connected to the electrical components (the camera mentioned above and the electric cylinder, rotating motor, swing motor, etc. mentioned below) (which can be connected to the same controller for unified control or directly connected through wires), the power supply chamber 15 corresponds to each power supply contact 231 and is connected along the A power supply bar 152 electrically connected to an external power source (power can be directly taken from a power supply line or from nearby existing facilities) is arranged longitudinally. When the power supply contact 231 and the power supply bar 152 are abutted against each other, a power supply coordination is formed. During installation, the external power source is connected to the power supply bar 152 and the components on the movable seat 2 that require electrical energy are connected to the power supply contact 231. Since the power supply bar 152 is arranged longitudinally, when the movable seat 2 moves longitudinally, the power supply contact 231 of the movable seat 2 always maintains an abutment state with the corresponding power supply bar 152, thereby ensuring stable power supply coordination. In addition, the power supply structure can not only be used for power supply circuits, but also for information transmission circuits.

[0037] The power supply block 23 corresponds to each power supply contact 231 and is provided with a stabilizing hole 232 in the transverse direction. The power supply contact 231 includes a hemispherical portion 2311 that abuts against the power supply bar 152 and a cylindrical portion 2312 that slides with the stabilizing hole 232. A stabilizing spring 233 is compressed between the stabilizing hole 232 and the cylindrical portion 2312 to reset the hemispherical portion 2311 to the power supply bar 152. The stabilizing hole 232 cooperates with the cylindrical portion 2312 to enable the power supply contact 231 to move laterally stably, and the stabilizing spring 233 enables the hemispherical portion 2311 to always abut against the power supply bar 152, thereby making the power supply cooperation more stable. Even if the power supply contact 231 is worn, the spacing can be automatically compensated.

[0038] The lifting mechanism includes electric cylinders 21 respectively arranged on both sides of the movable seat 2 in the lateral direction, an electric rod 211 fixed to the bottom of the lifting seat 3 is driven above the electric cylinder 21, the rotating mechanism includes a rotating motor 31 fixed below the lifting seat 3, a motor shaft 311 passing through the lifting seat 3 and rotatingly drivingly cooperating with the rotating seat 4 is driven above the rotating motor 31, the swinging mechanism includes swinging seats 41 located on both sides of the camera 5 and rotatingly cooperating with the camera 5, one of the swinging seats 41 is provided with a swinging motor 411 for driving the camera 5 to swing vertically, the space on both sides of the movable seat 2 is reasonably utilized to arrange the electric cylinder 21 for driving the lifting seat 3 to lift, and the space below the lifting seat 3 is reasonably utilized to arrange the rotating motor 31 for driving the rotating seat 4 to rotate, the camera 5 is stably swung by the swinging seats 41 on both sides, and one of the swinging seats 41 is used to arrange the swinging motor 411 for driving the camera 5 to swing vertically, in summary, the stable operation of the device is ensured while the structure is more streamlined.

[0039] A retreat groove 22 for retreating the rotary motor 31 is provided above the movable seat 2. The retreat groove 22 is added so that the lifting seat 3 can be closer to the movable seat 2 when descending, thereby increasing the compactness of the device structure.

[0040] The sealing mechanism includes a sealing seat 16 and a sealing plate 17. The sealing seat 16 is fixed above the sealing housing 1. The identification port 12 is located at the top of the sealing seat 16. The sealing seat 16 is located below the identification port 12 and is vertically provided with a sealing channel 161 connected to the guide channel 11. The sealing plate 17 is located above the sealing seat 16 and is sealed and matched with the upper part of the sealing seat 16. A plurality of guide rods 171 are provided at the lower edge of the sealing plate 17 (the horizontal cross-section of the sealing plate 17 is square, the horizontal cross-section of the sealing channel 161 is circular, and the guide rods 171 are located at the corners of the square). The sealing seat 16 and each guide rod 171 are correspondingly provided with a guide hole 162 for vertical sliding matching. A reset hole 163 with a diameter larger than the guide hole 162 is provided below the guide hole 162. A reset step 164 is formed at the junction of the reset hole 163 and the guide hole 162. The reset hole 163 is vertically slidably matched with the reset disk 172, and the guide rod 171 is sleeved with a reset spring 173 compressed above the reset disk 172 and the reset step 164. The rotating seat 4 is located above the camera 5 and is provided with a lifting plate 42 that cooperates with the sealing plate 17 to lift the sealing plate 17. A plurality of columns 421 that are fixedly matched with the rotating seat 4 are provided below the lifting plate 42. When identification is required, the electric cylinder 21 drives the lifting seat 3 to rise, thereby driving the lifting plate 42 to pass through the sealing channel 161 to lift the sealing plate 17, and the camera 5 located below the lifting plate 42 extends out of the identification port 12 for identification, and the reset spring 173 is in a compressed state at this time; when the identification is completed, the electric cylinder 21 drives the lifting seat 3 to descend, the lifting plate 42 returns to the guide channel 11, and the reset spring 173 returns to its original state, driving the sealing plate 17 to descend and restore the sealing cooperation state with the sealing seat 16.

[0041] A pressure sensor 422 is provided above the lifting plate 42. When a heavy object covers the sealing plate 17, the lifting plate 42 cannot lift the sealing plate 17. When the pressure sensor 422 above the lifting plate 42 exceeds the set pressure value, the lifting plate 42 descends and moves to the adjacent identification port 12 to identify another license plate of the vehicle parked above (such as identifying the rear license plate when the front license plate recognition fails), thereby avoiding damage to the device due to excessive lifting pressure and making the identification function more intelligent.

[0042] A guide chamfer 1611 is provided along the edge of the lower end of the sealing channel 161 to guide the lifting plate 42 to enter the sealing channel 161. The guide chamfer 1611 is added to guide the position of the lifting plate 42 before it enters the sealing channel 161 to ensure that it can accurately enter the sealing channel 161 that cooperates with its vertical sliding, thereby ensuring the stable operation of the device.

[0043] A drainage enclosure 18 is arranged around the sealing seat 16 above the sealing shell 1, and a drainage ramp 181 is arranged between the outer periphery of the sealing seat 16 and the inner periphery of the drainage enclosure 18, and the height gradually decreases in the direction away from the sealing seat 16. The sealing shell 1 is located below the drainage enclosure 18 and is vertically provided with a drainage pipe 182 connected to the lowest point inside the drainage enclosure 18 (the length of the drainage pipe 182 in the accompanying drawing is only for reference and can be adjusted according to actual needs). In order to prevent the accumulated water on the road from submerging the identification port 12 and causing the accumulated water to be poured into the sealing shell 1 when the sealing plate 17 rises, a drainage enclosure 18 is arranged on the outer periphery of the sealing seat 16, and the drainage ramp 181 is used to guide the accumulated water to the lowest point inside the drainage enclosure 18, and then discharge it into the soil or sewer pipe through the drainage pipe 182, so as to ensure the stable operation of the device. After the sealing shell 1 is buried underground, the upper end surface of the drainage enclosure 18 is flush with the ground.

[0044] When the device is running, when the car stops in one of the parking spaces, the corresponding electromagnetic sensor 6 will detect that the car is stopping. After stopping for a certain period of time, the servo motor 14 drives the movable seat 2 to move longitudinally to below the identification port 12 located at the front or rear of the car, that is, Figure 5 As shown, the electric cylinder 21 drives the lifting seat 3 to rise, driving the lifting plate 42 to pass through the sealing channel 161 to lift the sealing plate 17, and the camera 5 located below the lifting plate 42 extends out of the identification port 12 for identification, and transmits the identification information to the control center, that is, Figure 6 As shown, after the identification is completed, the electric cylinder 21 drives the lifting seat 3 to descend, the lifting plate 42 returns to the guide channel 11, and the sealing plate 17 descends to restore the sealing matching state with the sealing seat 16, and returns to Figure 5 state, the movable seat 2 is immediately ready for the next recognition work.

Claims

1. A hidden license plate detection device for a roadside parking fee collection system, characterized in that: It comprises a sealed shell buried under the parking space, wherein a movable seat, a guide channel for longitudinal movement of the movable seat and a driving mechanism for driving the movable seat to move along the guide channel are arranged in the sealed shell, a lifting seat and a lifting mechanism for driving the lifting seat to lift and lower are arranged above the movable seat, a rotating seat and a rotating mechanism for driving the rotating seat to rotate are arranged above the lifting seat, a camera and a swinging mechanism for driving the camera to swing up and down are arranged on the rotating seat, the sealed shell is provided with an active power supply mechanism for supplying power to electrical components on the movable seat when the movable seat moves longitudinally, a plurality of identification openings for the camera to extend out of the sealed shell are equidistantly arranged longitudinally above the sealed shell, and a sealing mechanism for closing the identification openings after the camera returns to the sealed shell, and an electromagnetic sensor for identifying vehicle parking is arranged between adjacent identification openings above the sealed shell.

2. The hidden license plate detection device for roadside parking fee collection system according to claim 1 is characterized in that: The driving mechanism includes a motor chamber fixed to the longitudinal end of the sealed shell, a servo motor is arranged in the motor chamber, and the servo motor is provided with a driving screw rod extending into the guide channel and rotatingly cooperating with the longitudinal end of the sealed shell along the longitudinal drive, and the driving screw rod passes through the movable seat and cooperates with the movable seat thread.

3. The hidden license plate detection device for roadside parking fee collection system according to claim 2 is characterized in that: The movable power supply mechanism includes a power supply chamber arranged longitudinally on the side of the sealed shell, the power supply chamber is provided with a power supply port connected to the guide channel along the longitudinal direction, the movable seat is provided with a power supply block passing through the power supply port and cooperating with the power supply chamber in the longitudinal sliding manner, the end surface of the power supply block facing the power supply chamber is provided with a plurality of power supply contacts arranged vertically and electrically connected to the electrical components, the power supply chamber corresponds to each power supply contact and is provided with a power supply strip electrically connected to the external power supply along the longitudinal direction, and the power supply contacts and the power supply strip constitute power supply cooperation when they are abutted against each other.

4. The hidden license plate detection device for roadside parking fee collection system according to claim 3 is characterized in that: The power supply block corresponds to each power supply contact and is provided with a stabilizing hole along the horizontal direction. The power supply contact includes a hemispherical portion that abuts against the power supply bar and a cylindrical portion that slides with the stabilizing hole. A stabilizing spring is compressed between the stabilizing hole and the cylindrical portion to reset the hemispherical portion to the power supply bar.

5. The hidden license plate detection device for roadside parking fee collection system according to claim 4 is characterized in that: The lifting mechanism includes electric cylinders respectively arranged on the lateral sides of the movable seat, and an electric rod fixed to the bottom of the lifting seat is driven above the electric cylinder. The rotating mechanism includes a rotating motor fixed below the lifting seat, and a motor shaft passing through the lifting seat and cooperating with the rotating seat for rotation is driven above the rotating motor. The swinging mechanism includes swinging seats located on both sides of the camera and cooperating with the camera for rotation, and one of the swinging seats is provided with a swinging motor for driving the camera to swing vertically.

6. The hidden license plate detection device for roadside parking fee collection system according to claim 5 is characterized in that: A retreat groove for the rotary motor to retreat is arranged above the movable seat.

7. The hidden license plate detection device for roadside parking fee collection system according to claim 6 is characterized in that: The sealing mechanism comprises a sealing seat and a sealing plate, wherein the sealing seat is fixed above the sealing shell, the identification port is located at the top of the sealing seat, the sealing seat is located below the identification port and is vertically provided with a sealing channel connected to the guide channel, the sealing plate is located above the sealing seat and is sealed with the upper part of the sealing seat, a plurality of guide rods are provided at the lower edge of the sealing plate, the sealing seat and each guide rod are correspondingly provided with guide holes for vertical sliding cooperation, a reset hole with a diameter larger than the guide hole is provided below the guide hole, a reset step is formed at the junction of the reset hole and the guide hole, a reset disk for vertical sliding cooperation with the reset hole is provided at the lower end of the guide rod, the guide rod sleeve is provided with a reset spring compressed above the reset disk and the reset step, the rotating seat is located above the camera and is provided with a lifting plate for lifting cooperation with the sealing plate, and a plurality of columns for fixed cooperation with the rotating seat are provided below the lifting plate.

8. The hidden license plate detection device for roadside parking fee collection system according to claim 7 is characterized in that: A pressure sensor is arranged above the jacking plate.

9. The hidden license plate detection device for roadside parking fee collection system according to claim 8, characterized in that: A guiding chamfer is arranged along the edge of the lower end of the sealing channel to guide the lifting plate to enter the sealing channel.

10. The hidden license plate detection device for roadside parking fee collection system according to claim 9, characterized in that: A drainage enclosure is arranged above the sealing shell and around the sealing seat. A drainage ramp is arranged between the outer periphery of the sealing seat and the inner periphery of the drainage enclosure, and its height gradually decreases in the direction away from the sealing seat. The sealing shell is located below the drainage enclosure and is vertically provided with a drainage pipe connected to the lowest point inside the drainage enclosure.

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