Vehicle pre-washing detection system

Abstract

The utility model discloses a vehicle pre-washing detection system, which relates to the technical field of vehicle washing, and comprises a safety grating protection system, distributed photoelectric sensors, an arched truss, depth camera arrays, a guide rail, a PLC (Programmable Logic Controller) control cabinet, a detection signal lamp and a waterproof outer frame, the distributed photoelectric sensors are divided into two groups and installed on the inner side wall of the arch truss, the safety grating protection system comprises U-shaped infrared transmitting / receiving arrays with the adjustable distance and is in real-time communication linkage with the PLC control cabinet, and the depth camera arrays are installed on an arch truss frame according to a topological structure that the depth camera arrays are arranged on the left side and the right side respectively and are arranged at the top end respectively. The camera is externally connected with a waterproof structure, all-directional and multi-angle detection of a vehicle can be realized, smudginess feature extraction and coordinate calibration are performed on a multi-view depth image, and accurate identification and positioning of attachments on the surface of a vehicle body are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle cleaning technical field, especially a vehicle prewash detection system. BACKGROUND

[0002] With the rapid development of automobile industry and the sustained growth of automobile ownership, the demand of vehicle prewash service is increasingly prosperous, with the development of industrial automation technology, automatic car washer gradually becomes the mainstream, in practical application, the equipment usually needs the following technologies:

[0003] 1、Electrical and control components, coordinate the work of various components, receive and process signals from operation buttons, sensors, etc.

[0004] 2、Washing and storage components, used for conveying high-pressure foam and water, connecting high-pressure water pump and high-pressure water gun, foam gun and other components;

[0005] When the car washer starts, the total water inlet switch opens, tap water enters the car washer through the water inlet pipe, water enters the high-pressure water pump, the high-pressure water pump is driven by the motor, high-pressure water is conveyed to the high-pressure water pump through the high-pressure pipe, the user operates the high-pressure water gun, controls the trigger of the water gun to adjust the on-off and size of the water flow, the high-pressure water flow is sprayed at high speed from the water gun nozzle, and the powerful impact force is used to wash the dust, sand and other dirt on the surface of the car body.

[0006] Many prewash systems still rely on manual visual inspection or single sensor scanning, which not only has low efficiency, but also has inaccurate dirt positioning, insufficient coverage of complex car body surface, lack of three-dimensional spatial positioning capability, is easy to cause missed detection or false triggering of cleaning action, and has the risk of resource waste and car body damage. UTILITY MODEL CONTENTS

[0007] In view of the deficiencies of the prior art, the utility model provides a vehicle prewash detection system, which solves the technical problems that the prewash system still relies on manual visual inspection or single sensor scanning, which not only has low efficiency, but also has inaccurate dirt positioning, insufficient coverage of complex car body surface, lack of three-dimensional spatial positioning capability, is easy to cause missed detection or false triggering of cleaning action, and has the risk of resource waste and car body damage.

[0008] To achieve the above purpose, the utility model realizes the following technical scheme:

[0009] A vehicle prewash detection system, comprising a safety grating protection system, a distributed photoelectric sensor, an arch truss, a depth camera array, a guide rail, a PLC control cabinet, a detection signal lamp and a waterproof frame, the depth camera array is fixed on the inner wall of the arch truss in a symmetrical distribution manner, and the distributed photoelectric sensor is installed on the inner side wall of the arch truss in two groups.

[0010] Preferably, the depth camera array is equipped with a ring-shaped light supplement module, and the ring-shaped light supplement module comprises an infrared light supplement lamp with a wavelength of 850nm and a visible light supplement lamp with a color temperature of 5600K.

[0011] The safety grating protection system comprises a U-shaped infrared emission / reception array with adjustable spacing, and is in real-time communication linkage with the PLC control cabinet.

[0012] Preferably, the PLC control cabinet is externally provided with switches, a manual / automatic switch, a reset button and an emergency stop button, and the control cabinet is provided with multiple internal buses, which can communicate with a PLC end, a depth camera end, a photoelectric end and a safety grating end.

[0013] The guide rails are horizontally arranged inside the arch truss.

[0014] The detection signal lamp is installed at the entrance of the arch truss and is connected with the control circuit of the entire detection system through a cable.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In the utility model, the distributed photoelectric sensor is composed of photoelectric sensors symmetrically distributed on both sides of the arch truss, and can obtain three-dimensional coordinate information in real time when a vehicle enters, thereby providing basic data support for subsequent pre-washing path planning; the safety grating protection system is arranged at the entrance of the detection area and comprises an infrared emission / reception module array, which can dynamically detect the width of the vehicle and generate a safety protection boundary, thereby ensuring the safety of the pre-washing process.

[0017] In the utility model, the depth camera array is installed on the arch truss frame in a topological structure of four on the left and right and three at the top end, and the camera is externally connected with a waterproof structure, so that omnidirectional and multi-angle detection of the vehicle can be realized, and dirty feature extraction and coordinate calibration of multi-view depth images can be performed, thereby realizing accurate identification and positioning of the adhering objects on the surface of the vehicle body. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the utility model can be implemented according to the content of the specification, and the following will be described in detail with reference to the preferred embodiments of the utility model and the accompanying drawings.

[0019] Figure 1 It is a structural diagram of the arch truss of the utility model;

[0020] Figure 2 It is a structural diagram of the PLC control cabinet of the utility model;

[0021] Figure 3 It is a structural diagram of the waterproof outer frame of the utility model;

[0022] Figure 4The utility model discloses a structure diagram of depth camera array.

[0023] In the drawing: 1, security grating protection system;2, distributed photoelectric sensor;3, arch truss;4, depth camera array;5, guide rail;6, PLC control cabinet;7, detection signal lamp;8, waterproof outer frame. DETAILED DESCRIPTION

[0024] The embodiment of the application provides a vehicle pre-washing detection system, which effectively solves the problem that the pre-washing system still relies on manual visual inspection or single sensor scanning. This mode is not only low in efficiency, but also inaccurate in dirt positioning, insufficient in covering complex vehicle body surface, lacks three-dimensional spatial positioning capability, and is prone to cause missed detection or false triggering of cleaning action, and there is a risk of resource waste and vehicle body damage. The distributed photoelectric sensor is composed of photoelectric sensors symmetrically distributed on both sides of the arch truss, and can obtain three-dimensional coordinate information of the vehicle in real time, thereby providing basic data support for subsequent pre-washing path planning. The security grating protection system is arranged at the entrance of the detection area and comprises an infrared emission / receiving module array, which can dynamically detect the width of the vehicle and generate a safety protection boundary, thereby ensuring the safety of the pre-washing process.

[0025] EMBODIMENT

[0026] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the technical scheme in the embodiment of the application effectively solves the technical problem that the pre-washing system still relies on manual visual inspection or single sensor scanning. This mode is not only low in efficiency, but also inaccurate in dirt positioning, insufficient in covering complex vehicle body surface, lacks three-dimensional spatial positioning capability, and is prone to cause missed detection or false triggering of cleaning action, and there is a risk of resource waste and vehicle body damage. The overall idea is as follows:

[0027] In view of the problems in the prior art, the utility model provides a vehicle pre-washing detection system, which comprises a security grating protection system 1, a distributed photoelectric sensor 2, an arch truss 3, a depth camera array 4, a guide rail 5, a PLC control cabinet 6, a detection signal lamp 7 and a waterproof outer frame 8. The depth camera array 4 is fixed on the inner wall of the arch truss 3 in a symmetrical distribution manner, and the distributed photoelectric sensor 2 is installed on the inner side wall of the arch truss 3 in two groups.

[0028] Receive the three-dimensional coordinate data of the vehicle output by the distributed photoelectric sensor 2;Analyze the multi-view depth image data collected by the depth camera array 4, and generate a three-dimensional coordinate mapping diagram of the surface attachments of the vehicle body;According to the stain type and distribution density, generate a differentiated cleaning path instruction;

[0029] The depth camera array 4 is equipped with a ring-shaped light supplement module, which contains an infrared light supplement lamp with a wavelength of 850 nm and a visible light supplement lamp with a color temperature of 5600 K. The depth camera array 4 adopts a 4-4-3 topology layout, which includes four multi-spectral depth cameras on the left and right vertical columns and three multi-spectral depth cameras on the top horizontal beam. The field of view angle overlap rate of each camera is greater than or equal to 30%, forming a three-dimensional visual detection network covering 360° of the vehicle body.

[0030] The safety grating protection system 1 includes a U-shaped infrared emission / reception array with adjustable spacing, which is in real-time communication linkage with the PLC control cabinet 6.

[0031] The PLC control cabinet 6 is externally provided with switches, manual / automatic, reset and emergency stop buttons. The control cabinet is provided with multiple internal buses, which can communicate with the PLC end, the depth camera end, the photoelectric end, and the safety grating end.

[0032] The guide rail 5 is horizontally arranged inside the arch-shaped truss 3 to guide the movement of the vehicle.

[0033] The detection signal lamp 7 is installed at the entrance of the arch-shaped truss 3 and is connected to the control circuit of the entire detection system through a cable.

[0034] Working principle:

[0035] In the first step, the distributed photoelectric sensor 2 is installed on both sides of the pre-washing channel. It detects the position and contour information of the vehicle by emitting and receiving light signals. The sensor array is connected to the PLC control system through a high-speed communication protocol to realize real-time data transmission and processing. The vehicle body contour is detected by the safety grating, and the PLC control system can accurately determine the position and size of the vehicle based on the received data, providing a basis for subsequent pre-washing path planning.

[0036] After the vehicle enters the pre-washing channel, the PLC control system controls the depth camera to start shooting high-definition images of the vehicle body. The depth camera array 4 module is arranged in a 4-4-3 layout, and the truss is covered with a ring-shaped light to prevent environmental factors from affecting the camera's work. The waterproof frame 8 avoids the influence of water vapor in the car washing environment. Advanced imaging technology is used to capture detailed information on the surface of the vehicle. After noise reduction and enhancement processing, the quality of the captured images is significantly improved, providing clear input for subsequent stain identification.

[0037] In the second step, to ensure the safety of the vehicle during the pre-washing process, safety grating is installed at key positions in the pre-washing channel. The safety grating is composed of a transmitter and a receiver. When a vehicle or a person enters the grating detection area, it will block the light beam, triggering the safety mechanism to stop the pre-washing operation and sounding an alarm.

[0038] The safety light barrier protection system 1 adopts a self-checking and cross-checking design. The transmitter and the receiver periodically send and receive self-checking signals. By comparing the self-checking signals with the expected values, the system can detect whether the transmitter or the receiver has a fault. At the same time, adjacent safety light barriers also perform cross-checking, further improving the safety of the system.

[0039] To prevent safety hazards caused by the failure of a single loop, the safety light barrier protection system 1 adopts an independent redundant dual-output design. That is, each safety light barrier has two independent output loops. When one of the loops fails, the other loop can still work normally, ensuring the reliability of the safety mechanism.

[0040] To effectively avoid external infrared light interference, the safety light barrier protection system 1 adopts a line synchronization technology. This technology synchronizes the operation of the transmitter and the receiver, ensuring that only light beams of a specific frequency and phase can be correctly identified. In this way, even if there are other infrared light sources in the external environment, they will not interfere with the normal operation of the safety light barrier.

[0041] The improved YOLOv neural network model receives the processed image as input and identifies and classifies the stains in the image through convolutional neural networks and other structures. The model can accurately distinguish different types of stains (such as bird droppings, insect carcasses, and mud) and assign each stain a unique identifier. This information will be used for subsequent planning of the pre-washing path.

[0042] After the vehicle enters the pre-washing channel, it is first positioned by the distributed photoelectric sensor 2. Then, the safety light barrier protection system 1 generates a safety boundary and determines the basic size of the vehicle body. Subsequently, the vehicle body enters the arched truss 3, and the internal depth camera array 4 takes multiple-angle photos of the vehicle, obtaining the overall image of the vehicle body. Finally, the YOLO deep learning network algorithm processes the image, marks the dirty areas, and generates differentiated cleaning path instructions based on the vehicle body contour and dirt level, providing reliable preprocessing data support for automated car washing equipment.

[0043] In addition, the system also has a double-channel safety protection mechanism, including a U-shaped safety light barrier arranged at the entrance and an emergency stop triggering device arranged inside the frame, further improving the safety and reliability of the system. The PLC control cabinet 6 integrates a path planning module that can generate the optimal pre-washing path based on the three-dimensional coordinate data and multi-angle depth image data of the vehicle, improving the pre-washing efficiency and reducing resource waste.

[0044] Finally, it should be noted that: apparently, the above embodiments are merely examples for clearly illustrating the utility model, and are not limited to the implementation. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A vehicle pre-wash detection system, comprising a safety light curtain protection system (1), distributed photoelectric sensors (2), an arched truss (3), a depth camera array (4), a guide rail (5), a PLC control cabinet (6), detection signal lights (7), and a waterproof outer frame (8), characterized in that, The depth camera array (4) is fixed on the inner wall of the arched truss (3) in a symmetrical distribution manner, and the distributed photoelectric sensor (2) is divided into two groups and installed on the inner side wall of the arched truss (3).

2. The vehicle pre-wash detection system as described in claim 1, characterized in that, The depth camera array (4) is equipped with a ring-shaped fill light module, which includes an infrared fill light with a wavelength of 850nm and a visible light fill light with a color temperature of 5600K.

3. The vehicle pre-wash detection system as described in claim 1, characterized in that, The safety light curtain protection system (1) includes a U-shaped infrared transmitting / receiving array with adjustable spacing, which communicates and links with the PLC control cabinet (6) in real time.

4. The vehicle pre-wash detection system as described in claim 1, characterized in that, The PLC control cabinet (6) is equipped with a switch, manual / automatic, reset button and emergency stop button. The control cabinet is equipped with multiple internal buses that can communicate with the PLC terminal, depth camera terminal, photoelectric terminal and safety light curtain terminal.

5. The vehicle pre-wash detection system as described in claim 1, characterized in that, The guide rails (5) are arranged horizontally inside the arched truss (3).

6. The vehicle pre-wash detection system as described in claim 1, characterized in that, The detection signal light (7) is installed at the entrance of the arched truss (3) and is connected to the control circuit of the entire detection system via a cable.

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