Blanking cover structure and control method thereof

Abstract

The invention discloses a blanking cap structure which comprises a cap body, the cap body comprises a cover plate and a plug column, a circle of annular sealing lip is arranged on the lower surface of the edge of the cover plate, a passive RFID tag is embedded in the cap body, a circle of annular conductive coating capable of being in electric contact with the metal surface of a vehicle body is arranged on the lower surface of the annular sealing lip, and a passive RFID tag is embedded in the passive RFID tag. And the annular conductive coating is connected with a chip circuit of the passive RFID tag to form a closed loop. The automobile blanking cap based on the composite material and intelligent sensing is light in weight, high in strength, reliable in sealing and capable of monitoring the installation state in real time and feeding information back to an automobile control system.

Description

TECHNICAL FIELD

[0001] The present application relates to a car plug cover. BACKGROUND

[0002] In the process of car manufacturing, there are many process holes left on the steel plate of the car body after stamping and welding. In order to prevent water, dust, noise and the like from entering the car through these holes, a plastic plug cover is usually used for sealing.

[0003] For example, the disclosure with the patent name of "plug cover, car interior panel and car" and the authorization announcement number of CN202186341U and the authorization announcement date of 2012-04-11 discloses a plug cover including a plug cover body, wherein: a groove and / or a protrusion are formed at the edge of the plug cover body, and are used for plug-in positioning with the protrusion and / or the groove formed at the edge of the mounting hole of the interior panel. However, the car plug cover similar to the prior art is mostly made of single plastic (such as PP and PA) through injection molding, and the structure usually includes a cover plate, a plug column in interference fit with the process hole, and an annular sealing lip for enhancing the sealing performance.

[0004] In addition, the existing plug cover has no state monitoring function. The plug cover is installed at a concealed position of the car body, and it is difficult to be detected whether it is installed in place, whether it is loose or lost in the use process. These problems may cause the vehicle to be involved in water, the sound insulation and noise reduction performance to be reduced, and even corrosion to be caused, and the after-sales maintenance efficiency is low, and the visual inspection is relied on manpower, which is time-consuming and laborious. SUMMARY

[0005] The technical problem to be solved by the present application is to realize a plug cover capable of monitoring the installation state in real time and feeding back information to the vehicle control system.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is: a plug cover structure, including a cover body, the cover body including a cover plate and a plug column, the lower surface of the edge of the cover plate being provided with an annular sealing lip, a passive RFID tag being embedded in the inside of the cover body, the lower surface of the annular sealing lip being provided with an annular conductive coating capable of electrically contacting the metal surface of the car body, and the annular conductive coating being connected with the chip circuit of the passive RFID tag to form a closed loop.

[0007] The bottom end of the plug column is provided with an upturned flange structure, and the flange structure cooperates with the annular sealing lip to clamp the edge of the hole.

[0008] The annular sealing lip is made of elastic rubber material, and the distance between the annular sealing lip and the flange structure is slightly smaller than the thickness of the metal body.

[0009] The flange structure is a conductive metal piece, two electrodes of the passive RFID tag are connected with the flange structure and the annular conductive coating respectively, and the flange structure and the annular conductive coating form a closed loop by using the conductive surface of the vehicle body.

[0010] The inner wall of the plug column is provided with a flexible strain sensor, and the flexible strain sensor is connected and outputs an induction signal to the chip of the passive RFID tag.

[0011] The passive RFID tag is a UHF frequency band passive tag, and the passive RFID tag has a storage chip for storing data information.

[0012] The cover body is long glass fiber reinforced polypropylene or carbon fiber reinforced nylon.

[0013] A control method of the plug cover structure

[0014] After the passive RFID tag is activated, two state signals are collected, including:

[0015] (1) The physical connection state is judged by the on-off of the closed loop of the passive RFID tag, and the installation and falling-off time of the plug cover is recorded;

[0016] (2) The stress state of the plug column is judged by the resistance change of the flexible strain sensor, and the data of whether it is too tight or there is abnormal stress is recorded.

[0017] The passive RFID tag sends the historical information including the ID, connection state and stress state back to the vehicle RFID reader.

[0018] The application is a kind of automobile plug cover based on composite material and intelligent sensing, which not only has light weight, high strength and reliable sealing, but also can monitor the installation state in real time and feed back information to the vehicle control system.

[0019] Specifically includes the following advantages:

[0020] 1. Material innovation: the fiber reinforced composite material is adopted, which significantly reduces the weight, greatly improves the strength, stiffness and fatigue resistance of the plug cover, and the thermal expansion coefficient is closer to the steel plate, and the environmental adaptability is stronger;

[0021] 2. Intelligent monitoring: the passive RFID sensing system is innovatively integrated, the double real-time monitoring of whether the plug cover is in place and whether the installation stress is normal is realized, and the problem of unknown state of hidden parts is fundamentally solved;

[0022] 3. High reliability: the passive RFID does not need to be built-in power supply, and the service life is the same as the vehicle; the flexible strain sensor monitors the stress, can prevent early cracks caused by over-tightening, and prevent troubles from the beginning;

[0023] 4. Convenient maintenance: the unique ID binding function enables quick positioning of the fault cover during after-sales maintenance, greatly improving the maintenance efficiency and accuracy, and reducing the after-sales cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] The following is a brief description of the content expressed in each figure in the specification of the present application and the markings in the figures:

[0025] Figure 1 is a top view of the cover;

[0026] Figure 2 is Figure 1 is a sectional view of part A-A;

[0027] Figure 3 is a side view of the cover;

[0028] The markings in the above figures are as follows: 1, cover plate; 2, plug column; 3, annular sealing lip; 4, passive RFID tag; 5, flexible strain sensor; 6, annular conductive coating. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, through the description of the embodiments, the shape, structure, mutual position and connection relationship between the parts, the function and working principle of each part, the manufacturing process and the operation and use method of each component involved in the specific embodiments of the present application, etc. are described in further detail, to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application.

[0030] The cover structure is a composite material and intelligent sensing based automobile cover, which not only has light weight, high strength and reliable sealing, but also can monitor the installation state in real time and feed back information to the vehicle control system. The cover body includes a cover body made of fiber reinforced composite material, and a plug column 2 extending downward from the cover plate 1, and the fiber reinforced composite material of the cover body is long glass fiber reinforced polypropylene (LGF-PP) or carbon fiber reinforced nylon (CF-PA), and the fiber content is 30%~50%.

[0031] The lower surface of the edge of the cover plate 1 is provided with a ring-shaped sealing lip 3, and the number of the ring-shaped sealing lip 3 is more than one, which is mainly used for sealing the plugged hole, and the bottom end of the plug column 2 is provided with a ring-shaped flange structure, the flange structure cooperates with the ring-shaped sealing lip 3 to clamp the edge of the hole, the ring-shaped sealing lip 3 is made of rubber material with elasticity, and the distance between the ring-shaped sealing lip 3 and the flange structure is slightly smaller than the thickness of the body metal, so that the cover plate 1 can be reliably fixed on the hole.

[0032] The cover body is embedded with a passive RFID tag 4. The passive RFID tag 4 is a UHF frequency passive tag, and the chip built therein has the function of storing a unique ID code and simple state information. The chip of the passive RFID tag 4 is electrically connected with a flexible strain sensor 5, which is pasted on the inner wall root stress concentration area of the plug post 2 in a pre-tightened state. The base material of the flexible strain sensor 5 is polyimide, and the sensing part is a metal foil strain gauge.

[0033] The lower surface of the annular sealing lip 3 is provided with a ring-shaped conductive coating 6 formed by printing process of conductive silver paste or conductive carbon paste. The ring-shaped conductive coating 6 is electrically connected with the chip circuit of the RFID tag to form a closed loop. When the plug cover is correctly installed into the process hole, the ring-shaped conductive coating 6 is in contact with the metal surface of the vehicle body, so that the closed loop is conducted. When the plug cover is loose or lost, the ring-shaped conductive coating 6 is separated from the vehicle body, and the closed loop is disconnected.

[0034] Specifically in use, the following steps are included:

[0035] 1. At the end of the vehicle production line or the maintenance workbench of the 4S store, the unique ID code of the plug cover is bound with the vehicle VIN code through the read-write operation of the handheld RFID reader-writer;

[0036] 2. During normal operation of the vehicle, the vehicle-mounted RFID reader-writer sends a read instruction to the RFID tag of the plug cover at a set period;

[0037] 3. After the passive RFID tag 4 is activated, two state signals are collected: one is to judge the physical connection state (installation / loss) through the on-off of the closed loop; the other is to judge the stress state (whether too tight or abnormal stress) of the plug post 2 through the resistance change of the flexible strain sensor 5;

[0038] 4. In addition, a vehicle-mounted RFID reader-writer capable of scanning the passive RFID tag 4 is arranged in the vicinity of the vehicle installed with the plug cover. If the vehicle-mounted RFID reader-writer is not equipped, the data information of the passive RFID tag 4 of each plug on the vehicle needs to be obtained through the handheld RFID reader-writer of the staff during each vehicle maintenance;

[0039] For the vehicle installed with the vehicle-mounted RFID reader-writer, the passive RFID tag 4 sends the information including the ID, connection state and stress state back to the vehicle-mounted RFID reader-writer;

[0040] 5. After receiving the information, if it is judged that the state is abnormal (such as loss or abnormal stress), the vehicle-mounted ECU sends a warning prompt to the driver through the instrument panel, and records the fault code and position information, which is convenient for subsequent maintenance.

[0041] The application is described above by way of example with reference to the accompanying drawings without limitation to the specifically described embodiments. Any modifications of the method concept and the technical solution of the application, or direct application of the method concept and the technical solution of the application to other occasions without modification, are within the scope of the application.

Claims

1. A closure structure comprising a closure body, the closure body comprising a closure plate and a plug post, a lower surface of an edge of the closure plate being provided with a ring-shaped sealing lip, characterized in that: The cover is internally embedded with a passive RFID tag, and the lower surface of the annular sealing lip is provided with an annular conductive coating capable of electrically contacting the metal surface of the vehicle body, which is connected with the chip circuit of the passive RFID tag to form a closed loop.

2. The blind cap structure according to claim 1, characterized by: The bottom end of the plug column is provided with a turned-up flange structure, which cooperates with the annular sealing lip clamping hole edge.

3. The blind cap structure according to claim 2, characterized by: The annular sealing lip is made of elastic rubber material, and the distance between the annular sealing lip and the flange structure is slightly smaller than the thickness of the metal body.

4. The blind cap structure according to claim 3, characterized by: The flange structure is a conductive metal part, and the two electrodes of the passive RFID tag are respectively connected with the flange structure and the annular conductive coating, which forms a closed loop with the conductive surface of the vehicle body.

5. The plug structure according to claim 1, 2, 3 or 4, characterized in that: The inner wall of the plug column is provided with a flexible strain sensor, which is connected and outputs sensing signals to the chip of the passive RFID tag.

6. The blind cap structure according to claim 5, characterized by: The passive RFID tag is a UHF frequency band passive tag, and the passive RFID tag internally has a storage chip for storing data information.

7. The plug-in closure according to claim 1 or 6, characterized in that: The cover is made of long glass fiber reinforced polypropylene or carbon fiber reinforced nylon.

8. A control method based on the plug cover structure of any one of claims 1-7, characterized in that: After the passive RFID tag is activated, two state signals are collected, including: (1) Determine the physical connection state by the on-off of the closed loop of the passive RFID tag, record the installation and falling time of the plug cover; (2) Determine the stress state of the plug column by the resistance change of the flexible strain sensor, and record whether it is too tight or there is abnormal stress data.

9. The control method according to claim 8, characterized in that: The passive RFID tag sends the historical information including its ID, connection state and stress state back to the vehicle RFID reader.

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