WO2020228382A1 - 光学器件表面清洁装置及安全检查系统 - Google Patents

光学器件表面清洁装置及安全检查系统 Download PDF

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Publication number
WO2020228382A1
WO2020228382A1 PCT/CN2020/073942 CN2020073942W WO2020228382A1 WO 2020228382 A1 WO2020228382 A1 WO 2020228382A1 CN 2020073942 W CN2020073942 W CN 2020073942W WO 2020228382 A1 WO2020228382 A1 WO 2020228382A1
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Prior art keywords
optical device
air
blowing
component
surface cleaning
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PCT/CN2020/073942
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English (en)
French (fr)
Inventor
李柯
许艳伟
孟德芳
叶立超
喻卫丰
胡煜
宗春光
孙尚民
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同方威视技术股份有限公司
同方威视科技（北京）有限公司
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Publication of WO2020228382A1 publication Critical patent/WO2020228382A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G01N2021/945—Liquid or solid deposits of macroscopic size on surfaces, e.g. drops, films, or clustered contaminants

Definitions

  • the present disclosure relates to the technical field of scanning inspection, in particular to a surface cleaning device and a safety inspection system for optical devices.
  • the related technology known to the inventor is to add a dust cover to the sensor or camera, or to reduce the impact of dust by manual wiping, and the dust cover cannot cover the sensor detection surface and the camera lens, otherwise it will reduce the sensitivity of the sensor .
  • an optical device surface cleaning device including:
  • a blowing part the blowing part is provided with a blowing port, which is set toward the surface to be cleaned of the optical device;
  • the gas source assembly is configured to provide compressed gas to the blowing part, so that the compressed gas is blown to the surface to be cleaned through the blowing port for decontamination.
  • the installation orientation of the blowing component is configured to make the direction of the air flow derived from the blowing port inclined relative to the surface to be cleaned.
  • the air blowing component is further provided with an air inlet
  • the air source assembly includes an air inlet pipe, one end of the air inlet pipe is connected to the air inlet, and the air inlet pipe extends straight when the air blowing component is installed.
  • an on-off valve is provided on the air path between the air source assembly and the blowing component, which is configured to turn on decontamination in the on state and stop decontamination in the off state.
  • a timer device is further included, configured to switch the on-off valve to the on state according to a preset time interval.
  • the device for cleaning the surface of an optical device further includes a control component
  • the optical device has a self-detection function, and is configured to send a prompt signal when it is detected that the degree of contamination on the surface to be cleaned exceeds a threshold
  • the control component is configured to receive When the prompt signal from the optical device is reached, the on-off valve is switched to the on state.
  • the optical device surface cleaning apparatus further includes an image acquisition component and a control component, the image acquisition component is configured to acquire an image of the surface to be cleaned, and the control component is configured to determine the degree of adhesion of the surface to be cleaned based on the acquired image , And switch the on-off valve to the on state when the stickiness of the surface to be cleaned exceeds the threshold.
  • the air source assembly includes a power component, an air compression component, and an air storage container
  • the power component is configured to provide power for the work of the air compression component
  • the air compression component is configured to generate compressed gas
  • the air storage container is configured to Store compressed gas
  • the optical device surface cleaning device further includes a pressure detecting component configured to detect the pressure in the air storage container so as to turn on the air compression component when the pressure in the air storage container is lower than a preset pressure.
  • the air blowing component includes a housing, the housing has an inner cavity, and the housing is provided with an air inlet and a plurality of air blowing ports, and the air inlet and each air blowing port are in communication with the inner cavity.
  • the total area of each blowing port is smaller than the area of the air inlet.
  • each blowing port is located on the same wall surface of the housing.
  • a smooth flow guide surface is provided in the housing, and the shape of the flow guide surface is configured to reduce the resistance of the air flow from the air inlet to the blowing port.
  • the air inlet and the air blowing port are provided on the adjacent wall surface of the housing, the guiding surface is arranged directly opposite to the air inlet, and the guiding surface faces the air inlet in a direction perpendicular to the inward direction from the air blowing port.
  • the wall where the mouth is located is inclined.
  • the optical device surface cleaning device further includes a driving adjustment component connected to the blowing component, configured to realize at least one of driving the blowing component to rotate to change the direction of the blowing port and driving the blowing component to move in translation. Adapt to changes in the position of optical devices or decontaminate different optical devices.
  • a safety inspection system including an optical device and the optical device surface cleaning device of the above-mentioned embodiment.
  • FIG. 1 is a schematic structural diagram of some embodiments of the optical device surface cleaning device of the present disclosure
  • FIG. 2 is a schematic diagram of the blowing part in the blowing state of the device for cleaning the surface of the optical device of the present disclosure
  • FIG. 3 is a schematic diagram of the internal structure of the blowing component in the surface cleaning device of the optical device of the present disclosure
  • FIG. 4 is a schematic structural diagram of some embodiments of the surface cleaning device for optical devices of the present disclosure.
  • FIG. 5 is a schematic diagram of the module composition of some embodiments of the optical device surface cleaning apparatus of the present disclosure.
  • first and second appearing in the present disclosure are only for convenience of description, to distinguish different components with the same name, and do not indicate a sequence or a primary-secondary relationship.
  • the present disclosure provides a surface cleaning device and a safety inspection system for optical devices, which can reduce the maintenance difficulty of optical devices.
  • the optical device surface cleaning device of some embodiments of the present disclosure can automatically clean the surface of the optical device by blowing out compressed air, which can reduce the maintenance cost and difficulty of the optical device, and reduce the false detection rate of the optical device, thereby improving
  • the use efficiency of the equipment improves the customer’s experience of using the equipment.
  • the present disclosure provides a surface cleaning device for optical devices, which will be referred to as “surface cleaning device” in the following.
  • it includes: optical device 6A, blowing component 5, and air source assembly 10.
  • the blowing component 5 is provided with a blowing port 53, which is set toward the surface to be cleaned 6 of the optical device 6A; the gas source assembly 10 is used to provide compressed gas to the blowing component 5 so that the compressed gas can pass through the blowing
  • the air port 53 is blown to the surface 6 to be cleaned for decontamination.
  • the optical device 6A may be an optical sensor, a camera lens, a lens, a grating, or the like.
  • the surface 6 to be cleaned may be a working surface of the optical device 6A for forming an optical path, or may be another surface.
  • the surface 6 to be cleaned is the detection surface; for a camera lens, the surface 6 to be cleaned is the shooting surface.
  • the surface 6 to be cleaned may be a flat surface, a curved surface, or a sawtooth surface as a whole.
  • optical device 6A According to the statistics of the usage of the optical device 6A, in areas with more sandy and dusty climates, maintenance personnel need to wipe the regional laser sensor once in a short time interval. In addition, in order to meet the functional requirements of the equipment, some optical devices 6A have a relatively high installation position and are difficult to wipe.
  • the surface cleaning device of this embodiment of the present disclosure can blow out compressed gas through the blowing component 5, the compressed gas reaches the surface 6 to be cleaned at a certain speed, and the high pressure characteristic of the compressed gas can remove dust or other dirt on the surface 6 to be cleaned.
  • Such a surface cleaning device can automatically clean the surface of the optical device 6A.
  • the installation position of the optical device 6A is not easy to touch in time, which can further reduce the maintenance cost and maintenance difficulty of the optical device 6A; and the effective decontamination can reduce the cost of the optical device 6A.
  • the false detection rate can also avoid scratches on the surface 6 to be cleaned by wiping.
  • the installation position of the blowing component 5 needs to be adjusted during installation, so that the blown gas can flow along the surface 6 to be cleaned to achieve a blowing effect.
  • the installation orientation of the blowing component 5 is configured such that the direction of the air flow derived from the blowing port 53 is inclined with respect to the surface 6 to be cleaned, and the installation orientation includes an installation position and an installation direction.
  • the installation position of the blowing component 5 can also be such that the direction of the air flow derived from the blowing port 53 is perpendicular or parallel to the surface 6 to be cleaned.
  • the blowing part 5 is also provided with an air inlet 52, and an air inlet tube 55 is connected to the air inlet 52.
  • the air inlet tube 55 is used to introduce the compressed gas provided by the air source assembly 10 into the blowing part 5.
  • the air intake pipe 55 extends straight. Specifically, the following factors need to be comprehensively considered on the basis of extending the air inlet pipe 55 straightly: the position of the air inlet 52 on the air blowing component 5, the location of the air source assembly 10, and the location of the air blowing component 5.
  • This arrangement can reduce the pressure loss when the compressed gas flows in the intake pipe 55, and maintain a higher pressure and speed when the compressed gas is blown out, so as to achieve a better cleaning effect.
  • the air path between the air source assembly 10 and the blowing part 5 is provided with an on-off valve 4 to open the decontamination when the air path is connected, and to stop when the air path is disconnected Decontamination.
  • an on-off valve 4 By setting the on-off valve 4, the decontamination can be started or stopped conveniently, and the timing and frequency of decontamination can be flexibly controlled.
  • the on-off valve 4 is a solenoid valve, such as a two-position three-way solenoid valve, which can automatically control the start or stop of the decontamination action through the control component 30.
  • the on-off valve 4 may also be a manual valve or a pneumatic valve.
  • each blowing part 5 can share the air source assembly 10.
  • An on-off valve 4 can be provided on the branch where each blowing component 5 is located. By controlling the working state of each on-off valve 4, it is possible to flexibly control whether the blowing component 5 in the branch is blowing.
  • the surface cleaning device of the present disclosure further includes a timer 40, such as a time relay or a PLC controller, configured to switch the on-off valve 4 to the on state according to a preset time interval.
  • a timer 40 such as a time relay or a PLC controller, configured to switch the on-off valve 4 to the on state according to a preset time interval.
  • This embodiment can periodically decontaminate the optical device 6A at a certain time interval, without judging the timing of decontamination, and the control is simple, and the cleanliness of the optical device 6A can be ensured by regular decontamination, and the working reliability is improved; because there is no need to set dirt
  • the degree of detection function is not affected by the working environment, and can be reliably decontaminated in harsh working environments.
  • the surface cleaning device of the present disclosure further includes a control component 30.
  • the optical device 6A has a self-detection function, such as a lidar detection device, configured to emit when it detects that the degree of adhesion of the surface 6 to be cleaned exceeds a threshold.
  • the control component 30 is configured to switch the on-off valve 4 to the ON state when receiving the reminder signal from the optical device 6A.
  • This embodiment can perform decontamination when the optical device 6A judges that the working surface is dirty, and the decontamination timing can be determined according to the actual degree of contamination of the optical device 6A, which can be applied to different working environments.
  • the present disclosure further includes an image acquisition component 20 and a control component 30.
  • the image acquisition component 20 may be a camera or the like and is configured to acquire an image of the surface 6 to be cleaned.
  • the control component 30 is configured to obtain an image based on the acquired image. According to the image algorithm, the degree of adhesion of the surface 6 to be cleaned is determined, and the on-off valve 4 is switched to the on state when the degree of adhesion of the surface 6 to be cleaned exceeds a threshold.
  • This embodiment can perform decontamination when the optical device 6A judges that the working surface is dirty.
  • the timing of decontamination can be determined according to the actual degree of contamination of the optical device 6A. It can be applied to different working environments and can reduce the damage to the optical device 6A. Functional requirements.
  • the air source assembly 10 includes a power component 1A, an air compression component 1 and an air storage container 2.
  • the power component 1A is used to provide power for the work of the air compression component 1, and the air compression component 1 is used to generate compressed gas.
  • the gas storage container 2 is used to store compressed gas so as to be able to meet the decontamination requirements of the optical device 6A at any time.
  • the power component 1A may be a motor or the like
  • the air compression component 1 may be an air pump or the like.
  • the air path between the air source assembly 10 and the air blowing part 5 is sequentially provided with a filter and a dryer to remove moisture and impurities in the external air and prevent impurities carried in the air from impacting the optical device 6A Scratches on the working surface of the gas, or moisture in the gas adheres to the working surface of the optical device 6A to affect detection or imaging, and it can also prevent damage to various components in the gas circuit system.
  • a one-way valve can also be provided on the air path between the air compression component 1 and the gas storage container 2 to allow only one-way flow of gas from the air compression component 1 to the gas storage container 2 to prevent When the air pressure in 2 is high, the gas flows back, which improves the reliability of the air compression component 1.
  • an overflow valve and a pressure detection component 3 may also be provided.
  • the air inlet of the overflow valve is in communication with the gas storage container 2 and the overflow pressure of the overflow valve is adjustable.
  • the pressure detection component 3 is used for detecting The pressure in the gas storage container 2 is used to adjust the overflow pressure of the overflow valve to realize the pressure regulating function of the gas circuit system. In this way, the air pressure can be adjusted according to the degree of adhesion to ensure sufficient air pressure for decontamination, while saving compressed air and preventing excessive air pressure from damaging the working surface of the optical device 6A.
  • the surface cleaning device of the present disclosure further includes a pressure detection component 3 for detecting the pressure in the air storage container 2 so that the air compression component 1 is turned on when the pressure in the air storage container 2 is lower than the preset pressure. , So as to ensure that the compressed air in the air storage container 2 is sufficient, and the decontamination function can be activated at any time.
  • the blowing component 5 includes a housing 51 with an inner cavity.
  • the housing 51 is provided with an air inlet 52 and a plurality of air blowing ports 53.
  • the air inlet 52 and each air blowing port 53 are The inner cavity is connected, and the blowing port 53 can be set as a small hole.
  • the air blowing ports 53 can be evenly arranged to improve the uniformity of the air flow to the surface 6 to be cleaned and optimize the cleaning effect.
  • the blown airflow can completely cover the surface to be cleaned 6 of the optical device 6A, and the cleaning effect can be improved, and the impact of the airflow on the surface to be cleaned 6A can be reduced by dispersing the airflow.
  • each blowing port 53 is smaller than the area of the air inlet 52. After the airflow enters the inner cavity of the housing 51, it can be further pressurized to ensure that the compressed gas is blown out with sufficient pressure to obtain a greater purging force, thereby improving the cleaning effect and cleaning efficiency.
  • the air blowing ports 53 are located on the same wall surface of the housing 51, which can make the air flow blow more concentratedly on the surface 6 to be cleaned and reduce air flow loss.
  • a smooth flow guide surface 54 is provided in the housing 51.
  • the shape of the flow guide surface 54 is configured to reduce the resistance of the air flow from the air inlet 52 to the blowing port 53 and prevent the air flow from turning. The increased resistance causes a greater pressure loss, so that the airflow has a greater blowing force.
  • the cross section of the casing 51 is rectangular, and the air inlet 52 and the blowing port 53 are provided on the adjacent wall surface of the casing 51.
  • the air inlet 52 is provided on the short side corresponding to On the wall surface
  • the blowing ports 53 are provided on the wall surface corresponding to the long side, so that more blowing ports 53 are provided to increase the blowing coverage area.
  • the guide surface 54 and the air inlet 52 are arranged directly opposite, and the guide surface 54 is inclined in a direction perpendicular to the inward direction (arrow A) from the air blowing opening 53 toward the wall surface close to the air inlet 52.
  • the guide surface 54 restricts and reduces the flow area of the airflow, forcing the airflow to flow through the short-circuit radial blowing port 53, which can reduce the pressure loss of the compressed air. Conducive to maintaining pressure.
  • the guide surface 54 is provided in the area directly opposite to the air inlet 52 in the housing 51.
  • the guide surface 54 is an arc-shaped curved surface, for example, an S-shaped arc-shaped curved surface. After entering the inner cavity of the housing 51 from the air inlet 52, a part of the gas that continues to flow forward flows along the guide surface 54 to the blowing port 53, and the other part flows directly to the blowing port 53.
  • the flow guide surface 54 is an inclined surface arranged diagonally in the housing 51.
  • the inclined surface and the wall surface where the air inlet 52 and the air blowing port 53 are located together form a gas flow area, which can further make the air flow blow in a shorter radial direction.
  • the port 53 flows.
  • the surface cleaning device of the present disclosure further includes a driving adjustment part 7, connected to the blowing part 5, and configured to drive the blowing part 5 to rotate to change the direction and drive of the blowing port 53 At least one of the translational movements of the blowing part 5 is adapted to adapt to the change of the position of the optical device 6A, or to decontaminate different optical devices 6A.
  • the optical device 6A will adjust the installation posture according to the detection function requirements.
  • the control component 30 can control the drive adjustment component 6A to drive the blowing component 5 to rotate, so that the blowing port 53 faces the waiting position of the optical device 6A. Clean the surface 6.
  • the adaptability of the surface cleaning device to the change of the installation posture of the optical device 6A can be improved, without the need to reinstall the blowing part 5, and the use is flexible and convenient.
  • each optical device 6A there are multiple optical devices 6A in a specific area. If each optical device 6A is provided with a blowing member 5, it will take up a large space and increase the cost.
  • the control component 30 can control the driving adjustment component 7 to drive the blowing component 5 to rotate or translate, so that the blowing port 53 faces the optical device 6A to be cleaned.
  • Each optical device 6A may be cleaned in turn, or the blowing port 53 may be directed toward the optical device 6A with a contamination degree exceeding a threshold value. This arrangement can save the space occupied by the surface cleaning device and reduce the installation cost.
  • the present disclosure also provides a safety inspection system, including: an optical device 6A and the optical device surface cleaning device of the above-mentioned embodiment.
  • the security inspection system may be a container vehicle inspection system.
  • the optical device 6A may be a camera provided in a security inspection system for taking pictures of the detected vehicle and identifying at least one of the container number and the license plate number.
  • the optical device 6A is a lidar sensor installed in the security inspection system, which is used to detect the relative position between the scanned object and the device, and determine the shape of the detected object and the best scanning timing. If the surface of the camera lens or sensor is severely stained, it will affect the shooting effect or the detection and recognition effect, and reduce the success rate of the detected object.
  • the safety inspection system of the present disclosure has at least one of the following advantages:
  • the false detection rate of the optical device 6A can be reduced, higher detection accuracy can be achieved, and the accuracy of scanning the object to be inspected by the safety inspection system can be improved.
  • the surface cleaning and scanning inspection of the optical device 6A can be carried out at the same time. There is no need to stop the machine when the surface is cleaned, which can improve the efficiency of the equipment and enhance the customer's experience of using the equipment.

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Abstract

一种光学器件表面清洁装置及安全检查系统，其中，光学器件表面清洁装置包括：吹气部件（5），吹气部件（5）上设有吹气口（53），吹气口（53）朝向光学器件（6A）的待清洁表面（6）设置；以及气源组件（10），被配置为向导流面（53）吹气部件（5）提供压缩气体，以使压缩气体通过导流面（53）吹气口（53）吹向导流面（53）待清洁表面（6）进行除污。该装置利用吹出压缩空气的方式对光学器件表面进行自动清洁，可降低光学器件的维护成本和维护难度，并降低光学器件的误检测率，从而提升设备的使用效率。

Description

光学器件表面清洁装置及安全检查系统
本公开是以申请号为 201910387660.2，申请日为 2019年5月10日的中国申请为基础，并主张其优先权，该中国申请的公开内容在此作为整体引入本公开中。
技术领域
本公开涉及扫描检查技术领域，尤其涉及一种光学器件表面清洁装置及安全检查系统。
背景技术
目前的光学传感器和相机在长期使用时，由于灰尘影响，传感器检测面或相机镜头的灵敏度降低，严重时导致传感器失灵，发生误判断的情况。发明人所知晓的相关技术是在传感器或相机上加装防尘罩，或通过人工擦拭来减少灰尘带来的影响，并且防尘罩不能遮挡传感器检测面和相机镜头，否则会降低传感器的灵敏度。
目前在设备使用中，只能依靠维护人员经常对传感器检测面、相机镜头进行擦拭，以减小灰尘对光学传感器和相机的影响。维护难度和维护量都大大提高，影响客户的设备使用体验。因此，需要提出一种清洁方案来降低设备传感器或相机的维护难度，提高设备使用效率。
发明内容
根据本公开的第一方面，提供了一种光学器件表面清洁装置，包括：
光学器件；
吹气部件，吹气部件上设有吹气口，吹气口朝向光学器件的待清洁表面设置；以及
气源组件，被配置为向吹气部件提供压缩气体，以使压缩气体通过吹气口吹向待清洁表面进行除污。
在一些实施例中，吹气部件的安装方位被配置为使吹气口导出的气流方向相对于待清洁表面倾斜。
在一些实施例中，吹气部件上还设有进气口，气源组件包括进气管，进气管的一端与进气口连接，在吹气部件安装的状态下，进气管平直延伸。
在一些实施例中，气源组件与吹气部件之间的气路上设有通断阀，被配置为在接通状态下开启除污，并在断开状态下停止除污。
在一些实施例中，还包括定时器件，被配置为按照预设的时间间隔使通断阀切换至接通状态。
在一些实施例中，光学器件表面清洁装置还包括控制部件，光学器件具有自检测功能，被配置为在检测到待清洁表面的粘污程度超过阈值时发出提示信号，控制部件被配置为在接收到光学器件发出的提示信号时使通断阀切换至接通状态。
在一些实施例中，光学器件表面清洁装置还包括图像获取部件和控制部件，图像获取部件被配置为获取待清洁表面的图像，控制部件被配置为根据获得的图像判断待清洁表面的粘污程度，并在待清洁表面的粘污程度超过阈值时使通断阀切换至接通状态。
在一些实施例中，气源组件包括动力部件、空气压缩部件和储气容器，动力部件被配置为空气压缩部件的工作提供动力，空气压缩部件被配置为产生压缩气体，储气容器被配置为存储压缩气体。
在一些实施例中，光学器件表面清洁装置还包括压力检测部件，被配置为检测储气容器内的压力，以便在储气容器内的压力低于预设压力时开启空气压缩部件。
在一些实施例中，吹气部件包括壳体，壳体具有内腔，壳体上设有进气口和多个吹气口，进气口和各个吹气口均与内腔连通。
在一些实施例中，各个吹气口的总面积小于进气口的面积。
在一些实施例中，各个吹气口位于壳体的同一壁面上。
在一些实施例中，壳体内设有平滑的导流面，导流面的形状被配置为减小气流从进气口流动至吹气口受到的阻力。
在一些实施例中，进气口和吹气口设在壳体相邻的壁面上，导流面与进气口正对设置，且导流面沿从吹气口垂直向内的方向朝向靠近进气口所在壁面倾斜。
在一些实施例中，光学器件表面清洁装置还包括驱动调整部件，与吹气部件连接，被配置为实现驱动吹气部件转动以改变吹气口朝向和驱动吹气部件平移运动中的至少一个，以适应光学器件的位置改变，或者对不同的光学器件进行除污。
根据本公开的第二方面，提供了一种安全检查系统，包括光学器件和上述实施例光学器件表面清洁装置。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1为本公开光学器件表面清洁装置的一些实施例的结构示意图；
图2为本公开光学器件表面清洁装置中吹气部件处于吹气状态的示意图；
图3为本公开光学器件表面清洁装置中吹气部件的内部结构示意图；
图4为本公开光学器件表面清洁装置的一些实施例的结构示意图；
图5为本公开光学器件表面清洁装置的一些实施例的模块组成示意图。
附图标记说明
1、空气压缩部件；1A、动力部件；2、储气容器；3、压力检测部件；4、通断阀；5、吹气部件；51、壳体；52、进气口；53、吹气口；54、导流面；55、进气管；6、待清洁表面；6A、光学器件；7、驱动调整部件；10、吹气部件；20、图像获取部件；30、控制部件；40、定时器件。
具体实施方式
以下详细说明本公开。在以下段落中，更为详细地限定了实施例的不同方面。如此限定的各方面可与任何其他的一个方面或多个方面组合，除非明确指出不可组合。尤其是，被认为是优选的或有利的任何特征可与其他一个或多个被认为是优选的或有利的特征组合。
本公开中出现的“第一”、“第二”等用语仅是为了方便描述，以区分具有相同名称的不同组成部件，并不表示先后或主次关系。
在本公开的描述中，采用了“上”、“下”、“顶”、“底”、“前”、“后”、“内”和“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开，而不是指示或暗示所指的装置必须具有特定的方位、以特定的方位构造和操控，因此不能理解为对本公开保护范围的限制。
目前在设备使用中，只能依靠维护人员经常对传感器检测面、相机镜头进行擦拭，以减小灰尘对光学传感器和相机的影响。这样维护难度和维护量都大大提高，影响客户的设备使用体验。因此，需要提出一种清洁方案来降低设备传感器或相机的维护难 度，提高设备使用效率。
为此，本公开提供了一种光学器件表面清洁装置及安全检查系统，能够降低光学器件的维护难度。
本公开一些实施例的光学器件表面清洁装置，利用吹出压缩空气的方式，能够对光学器件表面进行自动清洁，可降低光学器件的维护成本和维护难度，并降低光学器件的误检测率，从而提升设备的使用效率，提升客户对设备的使用体验。
如图1至图3所示，本公开提供了一种光学器件表面清洁装置，后续简称“表面清洁装置”，在一些实施例中，包括：光学器件6A、吹气部件5和气源组件10，其中，吹气部件5上设有吹气口53，吹气口53朝向光学器件6A的待清洁表面6设置；气源组件10，用于向吹气部件5提供压缩气体，以使压缩气体通过吹气口53吹向待清洁表面6进行除污。
在该实施例中，光学器件6A可以是光学传感器、相机镜头、透镜或光栅等。待清洁表面6可以是光学器件6A用于形成光路的工作表面，也可以是其它表面。例如，对于光学传感器，待清洁表面6是检测面；对于相机镜头，待清洁表面6是拍摄面。待清洁表面6整体可以是平面、曲面或锯齿等形状的表面。
根据光学器件6A的使用情况统计，在沙尘气候较多的地区，维护人员在较短的时间间隔就需要擦拭一次区域激光传感器。并且由于有些光学器件6A为了满足设备功能需求，安装位置较高，擦拭难度较大。
本公开该实施例的表面清洁装置可通过吹气部件5吹出压缩气体，压缩气体以一定速度到达待清洁表面6，利用其高压特性可将待清洁表面6的灰尘或其它脏污去除。此种表面清洁装置可对光学器件6A表面进行自动清洁，在光学器件6A的安装位置不易触及时，可进一步降低光学器件6A的维护成本和维护难度；而且通过有效除污可降低光学器件6A的误检测率，也能避免擦拭的方式在待清洁表面6留下划痕。这些优点均能提升带有光学器件6A的设备的使用效率，提升客户对设备的使用体验。
如图2所示，在安装时需要调整吹气部件5的安装方位，使吹出的气体能够沿待清洁表面6流动，起到吹扫效果。吹气部件5的安装方位被配置为使吹气口53导出的气流方向相对于待清洁表面6倾斜，安装方位包括安装位置和安装方向。
气流倾斜到达待清洁表面6的方式能够更有效地除污，而且在使灰尘或其它脏污脱离待清洁表面6之后，更容易将其吹离光学器件6A。可替代地，吹气部件5的安装方位也可使吹气口53导出的气流方向相对于待清洁表面6垂直或平行。
如图2所示，吹气部件5上还设有进气口52，进气口52上连接有进气管55，进气管55用于将气源组件10提供的压缩气体导入吹气部件5，可采用软管或硬管。在吹气部件5已完成安装固定的状态下，进气管55平直延伸。具体地，在使进气管55平直延伸的基础上需要综合考虑如下因素：进气口52在吹气部件5上的位置，气源组件10的设置位置，以及吹气部件5的设置位置。
此种设置方式能够减小压缩气体在进气管55内流动时的压力损失，使压缩气体吹出时仍能保持较高的压力和速度，以达到较优的清洁效果。
如图1所示，气源组件10与吹气部件5之间的气路上设有通断阀4，以在接通气路的状态下开启除污，并在断开气路的状态下停止除污。通过设置通断阀4，能够方便地开启或停止除污，可灵活控制除污时机和频次。
在图1中，通断阀4为电磁阀，例如两位三通电磁阀，可通过控制部件30自动控制除污动作的开启或停止。另外，通断阀4也可以是手动阀或气动阀等。
在设备上有多个光学器件6A需要除污时，可相应地设置多个吹气部件5，为了简化气路，减少占用空间，节约成本，各个吹气部件5可共用气源组件10。每个吹气部件5所在的支路上均可设置通断阀4，通过控制各个通断阀4的工作状态，可灵活地控制所在支路吹气部件5是否吹气。
在一些实施例中，本公开的表面清洁装置还包括定时器件40，例如时间继电器或PLC控制器，被配置为按照预设的时间间隔使通断阀4切换至接通状态。
该实施例能够以一定的时间间隔定期对光学器件6A除污，无需判断除污时机，控制简单，而且通过定期除污可保证光学器件6A的清洁性，提高工作可靠性；由于无需设置脏污程度检测功能，因而不受工作环境影响，在恶劣的工作环境中也能可靠地进行除污。
在一些实施例中，本公开的表面清洁装置还包括控制部件30，光学器件6A具有自检测功能，例如激光雷达检测器件，被配置为在检测到待清洁表面6的粘污程度超过阈值时发出提示信号，控制部件30被配置为在接收到光学器件6A发出的提示信号时使通断阀4切换至接通状态。
该实施例能够在光学器件6A自身判断出工作表面较脏时进行除污，可根据光学器件6A的实际脏污程度确定除污时机，可适用于不同的工作环境。
在一些实施例中，本公开的还包括图像获取部件20和控制部件30，图像获取部件20可以是摄像头等，被配置为获取待清洁表面6的图像，控制部件30被配置为根 据获得的图像，按照图像算法判断待清洁表面6的粘污程度，并在待清洁表面6的粘污程度超过阈值时使通断阀4切换至接通状态。
该实施例能够在光学器件6A自身判断出工作表面较脏时进行除污，可根据光学器件6A的实际脏污程度确定除污时机，可适用于不同的工作环境，还能降低对光学器件6A功能的要求。
如图4所示，气源组件10包括动力部件1A、空气压缩部件1和储气容器2，动力部件1A用于为空气压缩部件1的工作提供动力，空气压缩部件1用于产生压缩气体，储气容器2用于存储压缩气体，以便能够随时满足光学器件6A的除污需求。例如，动力部件1A可以是电机等，空气压缩部件1可以是气泵等。
在一些实施例中，气源组件10与吹气部件5之间的气路上依次设有过滤器和干燥器，以除去外部空气中的水分和杂质，防止气体中携带的杂质冲击到光学器件6A的工作表面上造成划伤，或者气体中的水分附着在光学器件6A的工作表面上影响检测或成像，另外还能防止对气路系统中各部件带来损伤。
在一些实施例中，还可在空气压缩部件1和储气容器2之间的气路上设置单向阀，仅允许气体从空气压缩部件1向储气容器2单向流动，防止在储气容器2内的气压较高时气体倒流，提高空气压缩部件1工作的可靠性。
在一些实施例中，还可设置溢流阀和压力检测部件3，溢流阀的进气口与储气容器2连通，且溢流阀的溢流压力可调，压力检测部件3用于检测储气容器2内的压力，以便调节溢流阀的溢流压力，实现气路系统的调压功能。这样能够根据粘污程度的不同调整气路压力，以保证有足够的气压除污，同时还能节省压缩气体，并防止气压过大对光学器件6A的工作表面造成损伤。
如图1所示，本公开的表面清洁装置还包括压力检测部件3，用于检测储气容器2内的压力，以便在储气容器2内的压力低于预设压力时开启空气压缩部件1，从而保证储气容器2内压缩空气充足，可随时开启除污功能。
如图3所示，吹气部件5包括壳体51，壳体51具有内腔，壳体51上设有进气口52和多个吹气口53，进气口52和各个吹气口53均与内腔连通，吹气口53可设置为小孔。例如，各个吹气口53可均布设置，以提高气流吹到待清洁表面6的均匀性，优化清洁效果。
通过设置多个吹气口53，可使吹出的气流全面覆盖光学器件6A的待清洁表面6，提高清洁效果，而且能够通过分散气流可降低气流对待清洁表面6A的冲击。
在一些实施例中，各个吹气口53的总面积小于进气口52的面积。气流在进入壳体51的内腔之后，可进一步增压，以保证压缩气体以足够的压力吹出，获得较大的吹扫力度，从而提高清洁效果和清洁效率。
如图2和图3所示，各个吹气口53位于壳体51上的同一壁面上，能够使气流较为集中地吹到待清洁表面6上，减少气流损失。
如图3所示，壳体51内设有平滑的导流面54，导流面54的形状被配置为能够减小气流从进气口52流动至吹气口53受到的阻力，防止气流引转弯阻力增大而造成较大的压力损失，以在气流吹出时具备较大的吹扫力度。
在一些实施例中，如图3所示，壳体51的截面为矩形，进气口52和吹气口53设在壳体51相邻的壁面上，例如，进气口52设在短边对应的壁面上，吹气口53设在长边对应的壁面上，以便设置更多的吹气口53增加吹扫覆盖面积。
可选地，导流面54与进气口52正对设置，且导流面54沿从吹气口53垂直向内的方向(箭头A)朝向靠近进气口52所在壁面倾斜。压缩气体从进气口52进入壳体51的内腔之后，导流面54限制并减少了气流的流动区域，迫使气流以较短路径向吹气口53流动，可减小压缩空气的压力损失，利于保持压力。
如图3所示，为了方便加工，导流面54设在壳体51内与进气口52正对的区域，导流面54呈弧形曲面，例如，呈S形弧形曲面，压缩气体从进气口52进入壳体51的内腔之后，部分继续向前流动的气体顺着导流面54流动至吹气口53，另一部分则直接流向吹气口53。
可选地，导流面54为在壳体51内对角设置的斜面，斜面与进气口52、吹气口53所在壁面共同围合形成气体流动区域，可进一步使气流以较短路径向吹气口53流动。
在一些实施例中，如图5所示，本公开的表面清洁装置还包括驱动调整部件7，与吹气部件5连接，被配置为实现驱动吹气部件5转动以改变吹气口53朝向和驱动吹气部件5平移运动中的至少一个，以适应光学器件6A的位置改变，或者对不同的光学器件6A进行除污。
在一种情况下，光学器件6A根据检测功能需求会进行安装姿态调整，相应地，控制部件30可控制驱动调整部件6A带动吹气部件5转动，以使其吹气口53朝向光学器件6A的待清洁表面6。可提高表面清洁装置对于光学器件6A安装姿态改变的适应性，无需重新安装吹气部件5，使用灵活方便。
在另一种情况下，在特定区域内设有多个光学器件6A，如果每个光学器件6A对应设置一个吹气部件5将会占用较大的空间，并增加成本。在各个光学器件6A包围的区域内，控制部件30可控制驱动调整部件7带动吹气部件5转动或平移，以使吹气口53朝向待清洁的光学器件6A。各个光学器件6A可依次轮流清洁，或者使吹气口53朝向粘污程度超过阈值的光学器件6A。此种设置方式能够节约表面清洁装置的占用空间，并降低设置成本。
其次，本公开还提供了一种安全检查系统，包括：光学器件6A和上述实施例的光学器件表面清洁装置。安全检查系统可以是集装箱车辆检查系统。
例如，光学器件6A可以是设在安全检查系统中的相机，用于对被检测车辆拍照，并识别集装箱号和车牌号中的至少一个。或者光学器件6A是设在安全检查系统中的激光雷达传感器，用于检测被扫描物体与设备之间的相对位置，判断被检测物体的形状与最佳扫描时机。如果相机镜头或传感器表面粘污严重，则会影响拍摄效果或检测识别效果，降低被检测物体识别成功率。
通过设置表面清洁装置，本公开的安全检查系统至少具备如下优点之一：
1、能够自动地对其上设置的光学传感器和相机镜头中的至少一个进行清洁，降低安全检查系统的维护成本和维护难度。
2、通过定期有效地对光学器件6A的工作表面进行除污，可降低光学器件6A的误检测率，达到较高的检测精度，提高安全检查系统对待检物进行扫描的准确性。
3、光学器件6A表面清洁和扫描检查环节可同时进行，在表面清洁时无需停机，可提高设备的使用效率，提升客户对设备的使用体验。
以上对本公开所提供的一种光学器件表面清洁装置及安全检查系统进行了详细介绍。本文中应用了具体的实施例对本公开的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本公开的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以对本公开进行若干改进和修饰，这些改进和修饰也落入本公开权利要求的保护范围内。

Claims (16)

  1. 一种光学器件表面清洁装置，包括：
    光学器件(6A)；
    吹气部件(5)，所述吹气部件(5)上设有吹气口(53)，所述吹气口(53)朝向光学器件(6A)的待清洁表面(6)设置；以及
    气源组件(10)，被配置为向所述吹气部件(5)提供压缩气体，以使压缩气体通过所述吹气口(53)吹向所述待清洁表面(6)进行除污。
  2. 根据权利要求1所述的光学器件表面清洁装置，其中所述吹气部件(5)的安装方位被配置为使所述吹气口(53)导出的气流方向相对于所述待清洁表面(6)倾斜。
  3. 根据权利要求1所述的光学器件表面清洁装置，其中所述吹气部件(5)上还设有进气口(52)，所述气源组件包括进气管(55)，所述进气管(55)的一端与所述进气口(52)连接，在所述吹气部件(5)安装的状态下，所述进气管(55)平直延伸。
  4. 根据权利要求1所述的光学器件表面清洁装置，其中所述气源组件(10)与所述吹气部件(5)之间的气路上设有通断阀(4)，被配置为在接通状态下开启除污，并在断开状态下停止除污。
  5. 根据权利要求4所述的光学器件表面清洁装置，还包括定时器件(40)，被配置为按照预设的时间间隔使所述通断阀(4)切换至接通状态。
  6. 根据权利要求4所述的光学器件表面清洁装置，还包括控制部件(30)，所述光学器件(6A)具有自检测功能，被配置为在检测到待清洁表面(6)的粘污程度超过阈值时发出提示信号，所述控制部件被配置为在接收到所述光学器件(6A)发出的提示信号时使所述通断阀(4)切换至接通状态。
  7. 根据权利要求4所述的光学器件表面清洁装置，还包括图像获取部件(20)和控制部件(30)，所述图像获取部件(20)被配置为获取所述待清洁表面(6)的图像，所述控制部件(30)被配置为根据获得的图像判断所述待清洁表面(6)的粘污程度，并在所述待清洁表面(6)的粘污程度超过阈值时使所述通断阀(4)切换至接通状态。
  8. 根据权利要求1所述的光学器件表面清洁装置，其中所述气源组件包括动力部 件(1A)、空气压缩部件(1)和储气容器(2)，所述动力部件(1A)被配置为向所述空气压缩部件(1)的工作提供动力，所述空气压缩部件(1)被配置为产生压缩气体，所述储气容器(2)被配置为存储压缩气体。
  9. 根据权利要求8所述的光学器件表面清洁装置，还包括压力检测部件(3)，被配置为检测所述储气容器(2)内的压力，以便在所述储气容器(2)内的压力低于预设压力时开启所述空气压缩部件(1)。
  10. 根据权利要求1所述的光学器件表面清洁装置，其中所述吹气部件(5)包括壳体(51)，所述壳体(51)具有内腔，所述壳体(51)上设有进气口(52)和多个所述吹气口(53)，所述进气口(52)和各个所述吹气口(53)均与所述内腔连通。
  11. 根据权利要求10所述的光学器件表面清洁装置，其中各个所述吹气口(53)的总面积小于所述进气口(52)的面积。
  12. 根据权利要求10所述的光学器件表面清洁装置，其中各个所述吹气口(53)位于所述壳体(51)的同一壁面上。
  13. 根据权利要求10所述的光学器件表面清洁装置，其中所述壳体(51)内设有平滑的导流面(54)，所述导流面(54)的形状被配置为减小气流从所述进气口(52)流动至所述吹气口(53)受到的阻力。
  14. 根据权利要求13所述的光学器件表面清洁装置，其中所述进气口(52)和所述吹气口(53)设在所述壳体(51)相邻的壁面上，所述导流面(54)与所述进气口(52)正对设置，且所述导流面(54)沿从所述吹气口(53)垂直向内的方向(A)朝向靠近所述进气口(52)所在壁面倾斜。
  15. 根据权利要求1所述的光学器件表面清洁装置，还包括驱动调整部件(7)，与所述吹气部件(5)连接，被配置为实现驱动所述吹气部件(5)转动以改变吹气口(53)朝向和驱动所述吹气部件(5)平移运动中的至少一个，以适应所述光学器件(6A)的位置改变，或者对不同的所述光学器件(6A)进行除污。
  16. 一种安全检查系统，包括：光学器件(6A)和权利要求1～15任一所述的光学器件表面清洁装置。
PCT/CN2020/073942 2019-05-10 2020-01-23 光学器件表面清洁装置及安全检查系统 WO2020228382A1 (zh)

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