Deep cavity cleaning device and deep cavity cleaning detection apparatus

Abstract

The application provides a deep cavity cleaning device and a deep cavity cleaning detection equipment, and belongs to the field of optical communication, comprising a multi-cavity cleaning pipe, a cleaning medium supply unit, a front fixed clamping plate unit, a rear fixed frame and a cleaning transverse driving unit; the multi-cavity cleaning pipe is used for supplying high-pressure gas, cleaning liquid and / or vacuum back absorption, and the multi-cavity cleaning pipe is driven to move transversely by the cleaning transverse driving unit to be inserted and pulled out at the deep cavity of a product; the application adopts a multi-cavity pipe design, provides comprehensive cleaning of the inner end face of a product with a deep cavity structure by air blowing, liquid spraying and back absorption, and has a flexible compensation design, can satisfy cleaning head movement compensation in the cleaning process of a precision product, realizes high-precision and high-efficiency cleaning in a deep cavity, and is convenient for popularization and application in the fields of optical communication, 3C, semiconductors and the like with a deep cavity scene.

Description

Technical Field

[0001] This invention belongs to the field of optical communication detection, specifically relating to a deep cavity cleaning device and a deep cavity cleaning detection equipment. Background Technology

[0002] In the field of optical communication, the quality of the fiber endface directly affects the transmission efficiency of optical signals. For optical modules containing panda-type polarization-maintaining fibers, the core indicators for endface inspection typically include: the cleanliness and surface defects of the endface, the relative position of the fiber core and the stress zone (panda eyes), and the azimuth alignment. Accurately obtaining this information is a prerequisite for ensuring product performance and reliability.

[0003] See Figure 1 The optical fiber tip of the optical module is inserted into one end of the deep cavity A of the guide housing. For products with optical fiber end faces at the bottom of the deep cavity, due to the cavity's depth and narrow cross-section, the testing equipment can only approach the end face to be tested at the bottom of the cavity from the cavity opening by probing with its front end. More importantly, this end face is not perpendicular to the cavity axis, but is an angled slope. This angle fundamentally changes the optical path conditions for illumination and imaging, causing conventional testing methods to face the following prominent problems.

[0004] Cleaning of the cavity and its side surfaces is often required before, after, or during optical inspection. In the field of optical communication, there is no cleaning device suitable for cavities longer than 150mm. Related technologies are only available in medical endoscopes and similar applications where the endoscope body and saline solution are coaxial, but these are not suitable for the high-precision environment of this application.

[0005] In summary, for the inspection of the inclined fiber end face in the deep cavity mentioned above, a new type of cleaning device is needed, which can independently perform gas-liquid two-phase cleaning of the cavity and the end face with the band. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention aims to provide a deep cavity cleaning device and a deep cavity cleaning detection device, which can solve the above-mentioned problems.

[0007] A deep cavity cleaning device includes a multi-cavity cleaning tube, a cleaning medium supply unit, a front fixing clamp unit, a rear fixing frame, and a cleaning lateral movement drive unit. The multi-cavity cleaning tube is used to supply high-pressure gas and cleaning liquid. The rear end of the multi-cavity cleaning tube is connected to the cleaning medium supply unit. The multi-cavity cleaning tube and the cleaning medium supply unit are fixedly supported and connected to the cleaning lateral movement drive unit through the front fixing clamp unit and the rear fixing frame. The cleaning lateral movement drive unit drives the multi-cavity cleaning tube to move laterally to insert and remove it in the deep cavity of the product. Furthermore, the deep cavity cleaning device also includes a multi-degree-of-freedom flexible compensation unit, which is located between the front fixed clamping plate unit and the front end face of the rear fixed frame, and is used for flexible compensation of displacement after the multi-cavity cleaning tube is inserted into the deep cavity of the product.

[0008] Furthermore, the multi-cavity cleaning tube adopts a dual-cavity tube, including an outer cavity tube and an inner cavity tube. The outer cavity tube is divided into an insertion / extraction section, a feeding section, and a pipe connection section. The feeding section is used to connect to the cleaning medium supply unit, and the pipe connection section is used to connect to the front fixing clamp unit.

[0009] Furthermore, the inner lumen of the multi-chamber cleaning tube is used to provide high-pressure gas and cleaning fluid, while the outer lumen is used to provide negative pressure back suction.

[0010] Furthermore, the multi-lumen cleaning tube includes multiple sets of outer and inner lumen tubes to improve cleaning efficiency.

[0011] Furthermore, the inner lumen is located in the middle or upper part of the outer lumen, and is in an eccentric ring or square shape.

[0012] Furthermore, the cleaning medium supply unit includes an end cleaning connector, a gas-liquid mixing rod, a gas-liquid mixing block, a cleaning agent control valve, a high-pressure gas source assembly, a cleaning agent source assembly, and a vacuum source; one end of the gas-liquid mixing rod is connected to a multi-chamber cleaning tube through the end cleaning connector, and the other end of the gas-liquid mixing rod is connected to the gas-liquid mixing block, and the cleaning agent control valve is connected to the gas-liquid mixing block.

[0013] Furthermore, the end cleaning connector includes channels corresponding to the outer and inner lumen tubes, which respectively provide negative pressure back suction, high-pressure gas, and cleaning agent.

[0014] Furthermore, the gas-liquid mixing rod includes an inner rod channel and an outer rod channel, which respectively provide negative pressure back suction, high-pressure gas and cleaning agent. The high-pressure gas and cleaning agent are provided from the inner rod channel, and the outer rod channel provides negative pressure back suction from the port on the outer peripheral surface of the rod body.

[0015] Furthermore, the gas-liquid mixing block includes a central tube and an outer peripheral channel, with a venting port on the top surface of the mixing block and a liquid inlet on the bottom surface of the mixing block; a cleaning agent control valve is connected to the outer end of the gas-liquid mixing block.

[0016] This application also provides a deep cavity cleaning and testing device, including a cleaning and testing station and a product positioning platform; the cleaning and testing station includes a self-focusing optical testing device, a non-contact cleaning device, a contact cleaning device, a testing area positioning device, and a testing lifting device; the non-contact cleaning device adopts the deep cavity cleaning device according to any one of claims 1-10, and is used for deep cavity insertion and removal positioning and non-contact fluid cleaning of the deep cavity fiber end face; the product positioning platform is located in front of the cleaning and testing station and is used for loading and unloading the product to be tested and for product positioning.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present application adopts a multi-cavity tube design, which provides air blowing, liquid spraying and back suction for comprehensive cleaning of the inner end face of products with deep cavity structure, and has a flexible compensation design, which can meet the compensation of cleaning head movement during the cleaning process of precision products, realize high-precision and high-efficiency cleaning in deep cavity, and facilitate its application in optical communication, 3C, semiconductor and other fields with deep cavity scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the optical module to be cleaned. Figure 2 This is a schematic diagram of the deep cavity cleaning device of this application; Figure 3 A schematic diagram and a partial enlarged view of a multi-lumen cleaning tube; Figure 4 for Figure 2 Partial disassembly diagram; Figure 5 A schematic diagram of a cleaning media supply unit; Figure 6 A schematic diagram of the end cleaning connector; Figure 7 This is a schematic diagram of a gas-liquid mixing rod; Figure 8 This is a schematic diagram of a gas-liquid mixture block; Figure 9 for Figure 8 A sectional view; Figure 10 A schematic diagram of a multi-degree-of-freedom flexible compensation unit; Figure 11 This is a schematic diagram of the cleaning and testing equipment; Figure 12 This is a schematic diagram of a cleaning and testing station; Figure 13 This is a flowchart of the cleaning detection method. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] A deep cavity cleaning device, see Figures 2-10 The deep cavity cleaning device includes a multi-cavity cleaning tube 210, a cleaning medium supply unit 220, a front fixed clamping plate unit 230, a rear fixed frame 240, and a cleaning transverse movement drive unit 250.

[0021] Arrangement: The multi-chamber cleaning tube 210 is used to supply high-pressure gas and cleaning fluid. The rear end of the multi-chamber cleaning tube 210 is connected to the cleaning medium supply unit 220. The multi-chamber cleaning tube 210 and the cleaning medium supply unit 220 are fixedly supported and connected to the cleaning transverse movement drive unit 250 through the front fixed clamping plate unit 230 and the rear fixed bracket 240. The cleaning transverse movement drive unit 250 drives the multi-chamber cleaning tube 210 to move laterally to insert and remove it in the deep cavity of the product.

[0022] Anomaly compensation: See Figure 2 and Figure 10 The deep cavity cleaning device also includes a multi-degree-of-freedom flexible compensation unit 260, which is disposed between the front fixed clamping plate unit 230 and the front end face of the rear fixed frame 240, and is used for flexible compensation of displacement after the multi-cavity cleaning tube 210 is inserted into the deep cavity of the product.

[0023] See specific examples. Figure 10 The multi-degree-of-freedom flexible compensation unit 260 adopts a six-degree-of-freedom flexible compensation unit, which facilitates the compensation of abnormal movements such as swaying and contact after the multi-cavity cleaning tube 210 is inserted into the deep cavity of the product. The multi-degree-of-freedom flexible compensation unit 260 includes a first connecting plate 261, a second connecting plate 262, a compensation guide 263, a compensation spring 264, and a pneumatic top pin 265. The compensation spring 264 is disposed between the two connecting plates. The distance between the two connecting plates can be changed by the extension and retraction of the pneumatic top pin 265. The compensation guide 263 may be omitted or made of flexible material to ensure movement compensation within the plane of the connecting plates.

[0024] The multi-cavity cleaning tube 210 is a double-cavity tube, including an outer cavity tube 211 and an inner cavity tube 212. The outer cavity tube 211 is divided into an insertion / extraction part 214, a feeding part 215 and a pipe connection part 216. The feeding part 215 is used to connect to the cleaning medium supply unit 220, and the pipe connection part 216 is used to connect to the front fixing clamp unit 230.

[0025] The inner lumen 212 of the multi-chamber cleaning tube 210 is used to provide high-pressure gas and cleaning fluid, while the outer lumen 211 is used to provide negative pressure back suction.

[0026] The multi-lumen cleaning tube 210 includes multiple sets of outer lumen tubes 211 and inner lumen tubes 212 to improve cleaning efficiency. In the illustrated example, two sets, i.e., double sets of double-through lumen tubes, are used, and a lumen partition plate 213 is provided between adjacent outer lumen tubes 211.

[0027] The inner lumen 212 is located in the middle or upper part of the outer lumen 211, and is eccentrically annular or U-shaped. In the illustrated example, the inner lumen 212 and the outer lumen 211 are flat tubes, with the inner lumen 212 located in the middle of the outer lumen 211 near the lumen partition 213. Alternatively, the inner lumen 212 can be located on the upper wall of the outer lumen 211. In addition to the rectangular flat tube shown in the illustration, round tubes or flat-round tubes can also be used.

[0028] In addition to using a two-way tube, the multi-chamber cleaning tube 210 can also use a three-way tube, which can be used for blowing air, spraying liquid, and negative pressure back suction, respectively.

[0029] The cleaning medium supply unit 220 includes an end cleaning connector 221, a gas-liquid mixing rod 222, a gas-liquid mixing block 223, a cleaning agent control valve 224, a gas-liquid fixing plate clamp 225, a medium supply shell 226, a medium supply end cover 227, a medium supply front cover 228, a corrugated conveying pipe 229, a high-pressure gas source assembly, a cleaning agent source assembly, and a vacuum source. The end cleaning connector 221 includes channels corresponding to the outer cavity tube 211 and the inner cavity tube 212, which respectively provide negative pressure back suction, high-pressure gas and cleaning agent. Specifically, the rear end of the end cleaning connector 221 is provided with a connector gas-liquid channel and a connector adsorption channel, which are respectively connected to the inner cavity tube 212 and the outer cavity tube 211 of the multi-cavity cleaning tube 210.

[0030] One end of the gas-liquid mixing rod 222 is connected to the multi-chamber cleaning tube 210 via the end cleaning connector 221, and the other end of the gas-liquid mixing rod 222 is connected to the gas-liquid mixing block 223. The cleaning agent control valve 224 is connected to the gas-liquid mixing block 223.

[0031] Referring to the attached diagram, the gas-liquid mixing rod 222 includes an inner rod channel and an outer rod channel, which respectively provide negative pressure adsorption, high-pressure gas, and cleaning agent. The high-pressure gas and cleaning agent are provided from the inner rod channel, and the outer rod channel provides negative pressure back suction from the port on the outer periphery of the rod. Specifically, a vacuum port A is opened on the outer periphery of the gas-liquid mixing rod 222, and an inner rod channel is opened at the center of the gas-liquid mixing rod 222. One end of the inner rod channel is connected to the end cleaning connector 221 and communicates with the inner cavity tube 212 of the multi-cavity cleaning tube 210. The other end of the inner rod channel is connected to the gas-liquid mixing block 223. An outer rod channel is opened on the outer periphery of the inner rod channel as an adsorption channel. One end of the outer rod channel is connected to the end cleaning connector 221 and communicates with the outer cavity tube 211 of the multi-cavity cleaning tube 210. The other end is connected to an external vacuum source and a wastewater return box through the vacuum port A.

[0032] The gas-liquid mixing block 223 includes a central tube 2231 and an outer peripheral channel 2232. A venting port A is provided on the top surface of the mixing block, and a liquid port B is provided on the bottom surface of the mixing block. The liquid port B is controllably connected to the rear end of the outer peripheral channel 2232 through the liquid transfer channel 2233 at the rear end of the gas-liquid mixing block 223. The cleaning agent control valve 224 is connected to the outer end (rear end shown in the figure) of the gas-liquid mixing block 223 and is used to control the opening and closing of the liquid transfer channel 2233 leading to the central tube 2231.

[0033] See Figures 11-12 The present invention also provides a cleaning and testing device, which includes a cleaning and testing station 1000 and a product positioning platform 2000. The cleaning and testing station 1000 includes a self-focusing optical testing device 100, a non-contact cleaning device 200, a contact cleaning device 300, a testing area positioning device 400, and a testing lifting device 500. The self-focusing optical testing device 100 is used for deep cavity fiber end face insertion and removal positioning and optical testing. The non-contact cleaning device 200 adopts the aforementioned deep cavity cleaning device and is used for deep cavity fiber end face insertion and removal positioning and non-contact fluid cleaning. The contact cleaning device 300 is used for deep cavity fiber end face insertion and removal positioning and contact cleaning. The product positioning platform 2000 is located in front of the cleaning and testing station 1000 and is used for loading and unloading products to be tested and for product positioning.

[0034] The cleaning and testing station 1000 also includes an inner frame 600 and an outer frame 700. The inner frame 600 is installed inside the outer frame 700 by a testing lifting device 500. The self-focusing optical testing device 100, the non-contact cleaning device 200, the contact cleaning device 300, and the testing area positioning device 400 are arranged inside the inner frame 600. The testing lifting device 500 drives the self-focusing optical testing device 100, the non-contact cleaning device 200, and the contact cleaning device 300 to lift and align with the testing end face area of ​​the product to be tested based on the image obtained by the testing area positioning device 400.

[0035] Between the cleaning and testing station 1000 and the product positioning platform 2000, there is also a product positioning vision module 3000. The product positioning vision module 3000 includes a vertical calibration and alignment camera unit and a horizontal calibration and alignment camera unit set on the product positioning frame, which are used to position the product on the tray on the product positioning platform 2000 below.

[0036] A barcode scanning module 4000 is also installed on the side of the product positioning platform 2000 for scanning the products on the pallet.

[0037] See Figure 13 The cleaning and testing method based on the aforementioned cleaning and testing equipment includes the following steps.

[0038] S1. Loading: The product pallet is transported to the product positioning platform 2000 and the pallet is positioned.

[0039] S2. Product positioning: Visual positioning of the product to be tested on the tray.

[0040] S3. Fiber optic end face positioning: The detection area positioning device 400 performs optical acquisition on the product at the cleaning or detection station to determine the visual positioning of the fiber optic end face to be tested inside the deep cavity of the product.

[0041] S4. Detection: The self-focusing optical detection device 100 performs optical image detection on the positioned end face of the optical fiber to be tested.

[0042] S5. Result Judgment: Based on the test results of S4, if the test result is OK, the test of the product is completed and an OK test result is output; if the test result is NG, non-contact cleaning is performed first, then S4 is entered. If the test result after non-contact cleaning is OK, the test of the product is completed and an OK test result is output; if the test result after non-contact cleaning is NG, contact cleaning is performed, non-contact cleaning is entered again, and then S4 is entered again. If the test result is OK, the test of the product is completed and an OK test result is output; if the test result is NG, the test of the product is also completed and an NG test result is output.

[0043] The method employs a three-time consecutive NG (Not From Good) judgment rule, which improves the detection yield and ensures the accuracy of the equipment.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep cavity cleaning device, characterized in that: The deep cavity cleaning device includes a multi-cavity cleaning tube (210), a cleaning medium supply unit (220), a front fixed clamping plate unit (230), a rear fixed frame (240), and a cleaning transverse drive unit (250). The multi-chamber cleaning tube (210) is used to supply high-pressure gas and cleaning fluid. The rear end of the multi-chamber cleaning tube (210) is connected to the cleaning medium supply unit (220). The multi-chamber cleaning tube (210) and the cleaning medium supply unit (220) are fixedly supported by the front fixed clamping plate unit (230) and the rear fixed bracket (240) and connected to the cleaning transverse drive unit (250). The cleaning transverse drive unit (250) drives the multi-chamber cleaning tube (210) to move laterally to insert and remove it in the deep cavity of the product.

2. The deep cavity cleaning device according to claim 1, characterized in that: The deep cavity cleaning device also includes a multi-degree-of-freedom flexible compensation unit (260), which is located between the front end face of the front fixed clamp unit (230) and the rear fixed frame (240) for flexible compensation of displacement after the multi-cavity cleaning tube (210) is inserted into the deep cavity of the product.

3. The deep cavity cleaning device according to claim 1, characterized in that: The multi-cavity cleaning tube (210) adopts a double-cavity tube, including an outer cavity tube (211) and an inner cavity tube (212). The outer cavity tube (211) is divided into an insertion part (214), a feeding part (215) and a pipe connection part (216). The feeding part (215) is used to connect to the cleaning medium supply unit (220), and the pipe connection part (216) is used to connect to the front fixing clamp unit (230).

4. The deep cavity cleaning device according to claim 3, characterized in that: The inner lumen (212) of the multi-chamber cleaning tube (210) is used to provide high-pressure gas and cleaning fluid, and the outer lumen (211) is used to provide negative pressure back suction.

5. The deep cavity cleaning device according to claim 3, characterized in that: The multi-lumen cleaning tube (210) includes multiple sets of outer lumen tubes (211) and inner lumen tubes (212) to improve cleaning efficiency.

6. The deep cavity cleaning device according to claim 3, characterized in that: The inner lumen tube (212) is located in the middle or upper part of the outer lumen tube (211) and is in the shape of an eccentric ring or a square.

7. The deep cavity cleaning device according to claim 4, characterized in that: The cleaning medium supply unit (220) includes an end cleaning connector (221), a gas-liquid mixing rod (222), a gas-liquid mixing block (223), a cleaning agent control valve (224), a high-pressure gas source assembly, a cleaning agent source assembly, and a vacuum source; one end of the gas-liquid mixing rod (222) is connected to the multi-chamber cleaning tube (210) through the end cleaning connector (221), and the other end of the gas-liquid mixing rod (222) is connected to the gas-liquid mixing block (223), and the cleaning agent control valve (224) is connected to the gas-liquid mixing block (223).

8. The deep cavity cleaning device according to claim 7, characterized in that: The end cleaning connector (221) includes channels corresponding to the outer lumen tube (211) and the inner lumen tube (212), which respectively provide negative pressure back suction, high-pressure gas and cleaning agent.

9. The deep cavity cleaning device according to claim 7, characterized in that: The gas-liquid mixing rod (222) includes an inner rod channel and an outer rod channel, which respectively provide negative pressure back suction, high-pressure gas and cleaning agent. The high-pressure gas and cleaning agent are provided from the inner rod channel, and the negative pressure back suction is provided from the port on the outer peripheral surface of the rod.

10. The deep cavity cleaning device according to claim 7, characterized in that: The gas-liquid mixing block (223) includes a central tube (2231) and an outer peripheral channel (2232). A venting port is provided on the top surface of the mixing block, and a liquid port is provided on the bottom surface of the mixing block. A cleaning agent control valve (224) is connected to the outer end of the gas-liquid mixing block (223).

11. A deep cavity cleaning and testing device, characterized in that: The cleaning and testing equipment includes a cleaning and testing station (1000) and a product positioning platform (2000); the cleaning and testing station (1000) includes a self-focusing optical testing device (100), a non-contact cleaning device (200), a contact cleaning device (300), a testing area positioning device (400), and a testing lifting device (500); the non-contact cleaning device (200) adopts the deep cavity cleaning device according to any one of claims 1-10, and is used for deep cavity insertion and removal positioning and non-contact fluid cleaning of the end face of the deep cavity optical fiber; the product positioning platform (2000) is located in front of the cleaning and testing station (1000) and is used for loading and unloading the product to be tested and for product positioning.

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