Laser measurement auxiliary device and method for Internet of Things equipment manufacturing

Abstract

The invention discloses a laser measurement auxiliary device and method for Internet of Things equipment manufacturing, and relates to the technical field of laser measurement for Internet of Things equipment, and the device comprises a buffer housing, a measurement housing, and an airflow purification mechanism. Wherein the buffer shell is arranged right below the laser measuring instrument; the measuring shell is arranged in the buffer shell, and the top end of the measuring shell is connected with the inner wall of the top end of the buffer shell through a mounting lug. The device is reasonable in structure, dynamic airflow purification is achieved by arranging the airflow purification mechanism and forming an active pressure difference, intermittent high-concentration dust such as welding tin smoke on a production line can be resisted, and the dustproof efficiency is improved; and through the cooperation of the double-layer shell and the pressure gradient, the internal cleanliness of the measurement shell is high, and the laser measurement precision requirement of the micro size of the Internet of Things equipment, such as the chip pin spacing, is met.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology for Internet of Things (IoT) devices, and particularly to a laser measurement auxiliary device and method for manufacturing IoT devices. Background Technology

[0002] In the manufacturing process of IoT devices such as smart sensor modules and wireless communication PCBs, laser measurement technology is widely used for micro-dimensional inspection due to its high precision. However, dust pollution in the production line environment remains a core issue restricting measurement accuracy. Therefore, laser measurement auxiliary devices are commonly used in the industry. However, existing laser measurement auxiliary devices still have significant shortcomings:

[0003] For example, Chinese utility model patent CN201821576892.5 discloses a laser measurement protective cover, which uses a filter and a fan on the side of the cover to create a unidirectional airflow to prevent external dust from entering. However, this solution relies solely on a single filter for passive filtration, which cannot cope with intermittent high-concentration dust in the production line, such as the fumes from soldering. Furthermore, the optical path window is prone to dust accumulation, requiring frequent manual cleaning, which seriously affects measurement efficiency.

[0004] The aforementioned laser measurement auxiliary devices have significant shortcomings in dynamic dust prevention capabilities: their dust prevention mechanisms mostly rely on passive filtration using a single filter, which is difficult to cope with intermittent high-concentration dust pollution such as the instantaneous burst of solder fumes during welding in the production line, and cannot avoid the problem of dust accumulation in the optical path window, resulting in the need for frequent manual cleaning to maintain measurement accuracy. This not only fails to build a stable local clean space for laser measurement of IoT devices, but also seriously affects measurement efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a laser measurement auxiliary device and method for manufacturing Internet of Things (IoT) devices, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices, comprising a buffer housing, a measuring housing, and an airflow purification mechanism; wherein, the buffer housing is disposed directly below the laser measuring instrument; the measuring housing is disposed inside the buffer housing, and the top end of the measuring housing is connected to the inner wall of the top end of the buffer housing via a mounting ear; both the top end of the buffer housing and the measuring housing are provided with windows, and the two windows are coaxially aligned; the optical path channel of the laser measuring instrument is aligned with the IoT device under test through the windows on the buffer housing and the measuring housing, so that the optical path of the laser beam from the window to the surface of the measured part is entirely within the buffer housing; the airflow purification mechanism is disposed between the buffer housing and the measuring housing, and is used to form an airflow pressure difference within the buffer housing and the measuring housing to prevent external dust from intruding; the measuring housing is provided with a dust removal mechanism, and is used to clean the dust accumulated on the windows of the measuring housing.

[0007] Preferably, the airflow purification mechanism includes an airflow control mechanism; an annular gap is formed between the inner wall of the buffer housing and the outer wall of the measuring housing; three air inlets are provided on the side wall of the buffer housing near the top; multiple first slits are provided at the bottom of the measuring housing, and the first slits are arranged in a circumferentially evenly spaced array around the axis of the measuring housing; multiple second slits are provided at the bottom of the measuring housing, and the second slits are arranged in a circumferentially evenly spaced array around the axis of the measuring housing at the connection position between the measuring housing and the window; an air outlet is provided at the bottom of the buffer housing; the airflow control mechanism is disposed between the top of the buffer housing and the measuring housing, and is used to generate airflow spiraling downward along the annular gap; part of the spiraling downward airflow is discharged through the air outlet, and part enters the measuring housing through the first slits;

[0008] A guide ring is provided on the top inner side of the buffer housing. The outer ring of the guide ring is adapted to the inner wall of the buffer housing, and the inner ring of the guide ring has an arc transition surface.

[0009] Preferably, the air inlet is provided with a filter screen, and the surface of the filter screen is coated with an oleophobic coating; a pre-filter layer is provided on the outside of the filter screen to intercept large dust particles.

[0010] Preferably, the airflow control mechanism includes a pair of miniature fans mounted on the inner wall of the top of the buffer housing via a mounting bracket; the air outlets of the miniature fans are tilted at 45° toward the window of the measuring housing, forming an airflow spiraling downward along the wall of the measuring housing;

[0011] An airflow sensor is installed within the annular gap to achieve closed-loop wind speed control.

[0012] Preferably, the dust removal mechanism includes multiple ultrasonic transducers; the multiple ultrasonic transducers are arranged in a circumferential array at equal intervals around the axis of the measuring housing at the bottom of the measuring housing; a laser scattering dust sensor is installed on the top of the measuring housing and is used to detect the dust concentration in real time. When the particle concentration exceeds the standard, the micro fan is automatically triggered to speed up and the dust removal mechanism is activated to perform ultrasonic cleaning.

[0013] Preferably, a sealing mechanism is provided between the buffer housing and the measuring housing; when the IoT device under test is placed or removed, the buffer housing and the measuring housing are allowed to be opened through the sealing mechanism; when laser measurement is performed, the sealing mechanism isolates the buffer housing and the measuring housing from the outside world, so that the airflow purification mechanism can perform airflow purification.

[0014] Preferably, the closing mechanism includes a first closing door, a second closing door, a driving mechanism, and multiple connecting rods; the first closing door is disposed on the buffer housing, the second closing door is disposed on the measuring housing, and the first closing door and the second closing door are connected by multiple connecting rods; the driving mechanism is mounted on the buffer housing via a mounting bracket and is used to drive the first closing door and the second closing door to move, so as to open or close the buffer housing and the measuring housing.

[0015] Preferably, the driving mechanism includes a connecting shaft, a pair of mounting blocks, a slider, a gear, and a driving component; the pair of mounting blocks are fixed to the first closed door, and the connecting shaft is fixed between the pair of mounting blocks; the slider is rotatably connected to the mounting blocks around the axis of the connecting shaft, and a torsion spring is provided between the slider and the mounting blocks; when the torsion spring loses its restraint, it drives the first closed door to maintain its contact and closure with the buffer housing; the gear is coaxially fixed to the connecting shaft, the driving component is mounted on the mounting frame, and the output end of the driving component is connected to the slider; the slider is slidably connected to the mounting frame, and the mounting frame has a toothed groove adapted to the gear; when the slider drives the slider to move, it drives the gear to align with the toothed groove, and as the gear continues to move and mesh with the toothed groove, the first closed door and the second closed door can be rotated through the toothed groove, so that the buffer housing and the measuring housing can be opened.

[0016] Preferably, the inner wall of the buffer housing is provided with three sets of L-shaped support members, and the three sets of L-shaped support members are equally spaced around the axis of the measuring housing; one end of the L-shaped support member is fixed to the inner side wall of the buffer housing by bolts, and the other end of the L-shaped support member maintains a gap with the outer side wall of the measuring housing;

[0017] A polytetrafluoroethylene connecting block is embedded between the L-shaped support and the measuring housing, allowing the two cavities to undergo slight thermal expansion and contraction displacement due to temperature changes.

[0018] A laser measurement-assisted method for manufacturing Internet of Things (IoT) devices, using the aforementioned laser measurement-assisted device for manufacturing IoT devices, specifically includes the following steps:

[0019] Step 1, Airflow Purification: Between the buffer housing and the measuring housing, a spiral downward clean airflow is generated by the airflow purification mechanism; this airflow movement allows some of the clean airflow to be smoothly introduced into the measuring housing through the bottom and then discharged from the top of the measuring housing, so as to maintain a clean space inside the measuring housing.

[0020] Step 2, Vibration dust removal: The dust removal mechanism drives the measuring housing to vibrate, and the vibration of the measuring housing will cause the window to vibrate synchronously; thereby removing the dust accumulated on the window.

[0021] In summary, the technical effects and advantages of this invention are as follows:

[0022] 1. The present invention has a reasonable structure. By setting up an airflow purification mechanism, it achieves dynamic airflow purification by forming an active pressure difference, which can resist intermittent high-concentration dust in the production line, such as solder fumes, and improve dust prevention efficiency. Moreover, through the synergy of the double-layer shell and pressure gradient, the cleanliness of the measuring shell is high, which meets the laser measurement accuracy requirements of small-sized IoT devices, such as the spacing between chip pins.

[0023] 2. In this invention, by setting up a dust removal mechanism, dust accumulated on the window surface of the measuring housing that is difficult to clean can be removed, thus avoiding optical path attenuation;

[0024] 3. By setting up a sealing mechanism, the opening and closing of the buffer housing and the measuring housing can be automatically controlled. When open, it is convenient to pick up and put down the measured part. When closed, it isolates the inside of the buffer housing and the measuring housing from the outside world, ensuring that the airflow purification mechanism can establish a stable pressure gradient. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the front view sectional structure of the present invention;

[0029] Figure 4 This is a partially cross-sectional, three-dimensional enlarged structural diagram of the buffer shell of the present invention;

[0030] Figure 5 For the present invention Figure 4 Enlarged structural diagram of region A in the middle;

[0031] Figure 6 This is a three-dimensional magnified structural diagram of the measuring housing of the present invention;

[0032] Figure 7 This is a partially cross-sectional, enlarged three-dimensional structural diagram of the guide ring of the present invention;

[0033] Figure 8 This is a partially cross-sectional three-dimensional structural diagram of the buffer housing and measuring housing of the present invention;

[0034] Figure 9 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention;

[0035] Figure 10 For the present invention Figure 9 A magnified structural diagram of region B in the middle;

[0036] Figure 11 This is a three-dimensional enlarged structural schematic diagram of the closing mechanism of the present invention;

[0037] Figure 12 For the present invention Figure 11 A magnified structural diagram of region C in the middle;

[0038] Figure 13 This is a flowchart of the method of the present invention.

[0039] In the diagram: 1. Buffer housing; 2. Measuring housing; 3. Window; 4. Positioning groove; 5. Airflow purification mechanism; 51. Annular gap; 52. Guide ring; 53. Air inlet; 54. Filter screen; 55. First gap; 56. Second gap; 57. Air outlet; 58. Airflow control mechanism; 581. Mounting bracket; 582. Miniature fan; 6. Dust removal mechanism; 61. Ultrasonic transducer; 7. Sealing mechanism; 71. First sealing door; 72. Second sealing door; 73. Connecting rod; 74. Drive mechanism; 741. Mounting block; 742. Connecting shaft; 743. Slider; 744. Gear; 745. Tooth groove; 746. Drive component; 8. L-shaped support component. Detailed Implementation

[0040] 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, and 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.

[0041] Example 1: Please refer to Figures 1-4 The illustrated laser measurement auxiliary device for manufacturing IoT devices includes a buffer housing 1, a measuring housing 2, and an airflow purification mechanism 5. The buffer housing 1 is positioned directly below the laser measuring instrument. A positioning groove 4 is located at the center of the bottom of the buffer housing 1, and the IoT device under test is positioned on the positioning groove 4 for laser measurement. The measuring housing 2 is located inside the buffer housing 1, and its top end is connected to the inner wall of the top end of the buffer housing 1 via a mounting ear. Both the buffer housing 1 and the measuring housing 2 have windows 3 at their top ends, and the two windows 3 are coaxially aligned. The optical path of the laser measuring instrument is aligned with the IoT device under test through the windows 3 on the buffer housing 1 and the measuring housing 2, ensuring that the laser beam's optical path from the window 3 to the surface of the measured part is entirely within the buffer housing 1. The airflow purification mechanism 5 is located between the buffer housing 1 and the measuring housing 2, and is used to create an airflow pressure difference within the buffer housing 1 and the measuring housing 2 to prevent external dust from entering. A dust removal mechanism 6 is provided on the measuring housing 2, and is used to clean the dust accumulated on the windows 3 of the measuring housing 2.

[0042] It should be noted that the buffer housing 1 serves as the outer layer of protection, with the measuring housing 2 nested inside. The tops of the two are rigidly connected by mounting ears, forming a double-layer protective structure of outer buffer and inner measurement. The top windows 3 of the buffer housing 1 and the measuring housing 2 are made of quartz glass and are ensured to be coaxially aligned, so that the optical path of the laser beam from the laser measuring instrument to the IoT device under test is entirely within a closed space, avoiding direct contamination of the optical path by external dust. It is understood that the laser measuring instrument is existing technology and is not shown in the figure, so it will not be described in detail.

[0043] During laser measurement, a directional airflow is formed between the two housings by the airflow purification mechanism 5. By controlling the pressure gradient between the buffer housing 1 and the measuring housing 2, i.e., the pressure inside the measuring housing 2 is higher than the pressure inside the buffer housing 1, external dust is prevented from invading the inner measuring space in reverse. The dust removal mechanism 6 on the measuring housing 2 performs physical vibration to remove the dust accumulated on the surface of the window 3 in real time, thus avoiding optical path attenuation.

[0044] Please see Figures 2-5The airflow purification mechanism 5 includes an airflow control mechanism 58; an annular gap 51 is formed between the inner wall of the buffer housing 1 and the outer wall of the measuring housing 2; three air inlets 53 are provided on the side wall near the top of the buffer housing 1; multiple first gaps 55 are provided at the bottom of the measuring housing 2, and the first gaps 55 are arranged in a circumferentially evenly spaced array around the axis of the measuring housing 2; multiple second gaps 56 are provided at the bottom of the measuring housing 2, and the second gaps 56 are arranged in a circumferentially evenly spaced array around the axis of the measuring housing 2 at the connection position between the measuring housing 2 and the window 3. An air outlet 57 is provided at the bottom of the buffer housing 1; an airflow control mechanism 58 is provided between the top of the buffer housing 1 and the measuring housing 2, and is used to generate airflow spiraling downward along the annular gap 51; part of the spiraling downward airflow is discharged through the air outlet 57, and part enters the measuring housing 2 through the first gap 55; a guide ring 52 is provided on the inner side of the top of the buffer housing 1, the outer ring of the guide ring 52 is adapted to the inner wall of the buffer housing 1, and the inner ring of the guide ring 52 is provided with an arc transition surface; the arc transition surface forms a 15° angle with the axis of the measuring housing 2.

[0045] It should be noted that the annular gap 51 reserved between the inner wall of the buffer housing 1 and the outer wall of the measuring housing 2 is preferably 15mm, serving as the main airflow channel. The airflow generated by the airflow control mechanism 58 flows spirally downward along the annular gap 51, part of which is discharged through the air outlet 57 at the bottom of the buffer housing 1, and part of which enters the interior of the measuring housing 2 through the first gap 55 at the bottom of the measuring housing 2, forming a dual path of outer layer circulation and inner layer air replenishment;

[0046] The inner ring of the guide ring 52 on the top inner side of the buffer housing 1 is provided with an arc transition surface, which can reduce the turbulence intensity of the airflow, ensure that the spiral airflow flows stably along the outer wall of the measuring housing 2, ensure the stability of the pressure gradient, avoid dust backflow caused by airflow turbulence, and achieve airflow optimization.

[0047] By measuring the second gap 56 at the connection position between the top of the housing 2 and the window 3, some airflow can be guided to directly blow on the surface of the window 3, forming a dust-proof air curtain at the top, reducing the initial adhesion of dust, and facilitating the outward guidance and removal of excess airflow inside the housing 2.

[0048] The airflow control mechanism 58 forms a spiral airflow in the annular gap 51. Compared with the straight airflow, the spiral airflow has a larger contact area with the wall of the measuring housing 2, which can more evenly remove dust in the gap and improve the anti-diffusion efficiency. The first gap 55 and the second gap 56 work together to ensure the positive pressure inside the measuring housing 2 and to specifically purify the window 3 area.

[0049] Please see Figures 1-2 A filter screen 54 is installed on the air inlet 53, and the surface of the filter screen 54 is coated with an oleophobic coating; a pre-filter layer is installed on the outside of the filter screen 54, which is used to intercept large dust particles.

[0050] It should be noted that the filter 54 at the air inlet 53 is made of glass fiber, which improves the filtration rate of fine particulate dust; the PTFE oleophobic coating on the surface can prevent oil stains from adhering to the production line and avoid clogging of the filter 54; it is understood that the PTFE oleophobic coating is existing technology and will not be described in detail.

[0051] Please see Figures 1-7 The airflow control mechanism 58 includes a pair of miniature fans 582 mounted on the inner wall of the top of the buffer housing 1 via a mounting bracket 581; the air outlets of the miniature fans 582 are tilted at 45° toward the window 3 of the measuring housing 2, forming an airflow spiraling downward along the side wall of the measuring housing 2; an airflow sensor is provided in the annular gap 51 to realize closed-loop control of wind speed.

[0052] It should be noted that a pair of miniature fans 582 are fixed to the inner wall of the top of the buffer housing 1 by the mounting bracket 581. The air outlets are tilted at 45° towards the window 3 of the measuring housing 2. The airflow blown out by the fans is guided by the guide ring 52 and forms a clockwise or counterclockwise spiral airflow along the outer wall of the measuring housing. The tangential velocity accounts for 70% and the axial velocity accounts for 30%. Through the cooperation of the 45° tilted air outlets and the guide ring 52, the airflow flows spirally along the wall of the measuring housing 2. The dustproof range is larger than that of radial airflow and can fully cover the side of the measuring housing 2.

[0053] An airflow sensor within the annular gap 51 detects wind speed in real time. When dust concentration increases, such as during the welding stage, the sensor sends a signal to the control system, which controls the micro fan 582 to increase its speed and enhance dust protection. It is understood that the control system is existing technology, such as a PLC control system, and will not be described in detail. The closed-loop wind speed control can automatically adjust according to the dust concentration, which is more energy-efficient than a fixed wind speed design, while ensuring the protective effect during periods of high dust concentration.

[0054] The airflow path throughout the process can be divided into five stages: external air intake, buffer chamber storage, annular gap 51 spiral, inner measuring chamber purification, and final exhaust; specifically,

[0055] External air intake: Driven by the atmospheric pressure and the initial pressure difference inside the buffer housing 1, the outside air enters from multiple air inlets 53. Since the air inlets 53 are designed to be tilted inward at 45°, the airflow first impacts the inner wall of the side of the buffer housing 1 after entering, and then diffuses upward along the inner wall of the buffer housing 1.

[0056] Buffer chamber temporary storage: The airflow entering the buffer housing 1 diffuses inside the buffer housing 1, forming an axial flow from bottom to top. As the cavity volume of the buffer housing 1 expands, the kinetic energy is dispersed, so the airflow velocity in the bottom region gradually decreases with increasing height.

[0057] Annular gap 51 spiral: The airflow at the top of the buffer housing 1 flows to the annular guide ring 52 under the suction of the micro fan 582. When the airflow moves upward along the inclined surface of the guide ring 52, it merges with the airflow driven by the micro fan 582 in the middle of the inclined surface. The two meet at a small angle to form a merging flow. Under the guidance of the guide ring 52, the merging airflow converts the axial kinetic energy into tangential kinetic energy and enters the channel along the tangential direction of the inlet of the annular gap 51.

[0058] Purification of the inner measuring cavity: After the spiral airflow reaches the bottom of the annular gap 51, it enters through the first gap 55 at the bottom of the inner measuring housing 2 under the drive of a slight negative pressure. The first gap 55 is evenly distributed along the circumference to ensure that the airflow enters evenly from the 360° direction. Some of the airflow that does not enter the first gap 55 flows to the air outlet 57 of the outer buffer housing 1. The airflow entering the inner measuring housing 2 diffuses upward naturally due to the slightly higher air pressure at the bottom. The airflow forms a piston flow in the cylindrical cavity, and the speed slowly decreases. There is no obvious turbulence, and a slight stagnation area is formed at the top to ensure that the laser measurement optical path is not affected by airflow disturbance.

[0059] Final exhaust: The inner measuring housing 2 has no exhaust port. After the airflow diffuses to the top, it slowly seeps out through the second gap 56 between the cavity wall and the top cover, ensuring that the inner layer always maintains a slightly negative pressure state. Since the airflow rate discharged from the top of the inner measuring housing 2 is slow at this time, when it is discharged from the inner measuring housing 2, the airflow will naturally dissipate, while some other airflow will be discharged from the second gap 56 at the top of the buffer housing 1.

[0060] Please see Figures 3-4 and Figure 6 The dust removal mechanism 6 includes multiple ultrasonic transducers 61; the multiple ultrasonic transducers 61 are arranged in a circumferential array around the axis of the measuring housing 2 at equal intervals at the bottom of the measuring housing 2; a laser scattering dust sensor is installed on the top of the measuring housing 2 and is used to detect the dust concentration in real time. When the particle concentration exceeds the standard, the micro fan 582 is automatically triggered to speed up and the dust removal mechanism 6 performs ultrasonic cleaning.

[0061] It should be noted that multiple ultrasonic transducers 61 are installed at equal intervals around the axis of the measuring housing 2 at the bottom. The high-frequency vibrations they generate are transmitted through the wall of the measuring housing 2 to the top window 3, causing the dust on the surface of the window 3 to be removed by the vibration and then carried away by the airflow in the second gap 56. It is understood that the ultrasonic transducer 61 is existing technology with a power of 5W and a frequency of 40kHz.

[0062] The dust concentration near the window 3 is detected in real time by a laser scattering dust sensor on the top of the housing 2. When the dust particle concentration exceeds the standard, the ultrasonic transducer 61 is automatically triggered and the micro fan 582 is accelerated, forming a closed-loop control of detection, cleaning and enhanced protection.

[0063] Please see Figures 8-9 A sealing mechanism 7 (such as) is provided between the buffer housing 1 and the measuring housing 2. Figure 4 (As shown); When the IoT device under test is placed or removed, the buffer housing 1 and the measurement housing 2 are allowed to be opened through the sealing mechanism 7; When laser measurement is performed, the buffer housing 1 and the measurement housing 2 are isolated from the outside through the sealing mechanism 7 so that the airflow purification mechanism 5 can perform airflow purification; The sealing mechanism 7 includes a first sealing door 71, a second sealing door 72, a drive mechanism 74 and a plurality of connecting rods 73; The first sealing door 71 is disposed on the buffer housing 1, and the second sealing door 72 is disposed on the measurement housing 2. The first sealing door 71 and the second sealing door 72 are connected by a plurality of connecting rods 73; The drive mechanism 74 is mounted on the buffer housing 1 through a mounting base and is used to drive the first sealing door 71 and the second sealing door 72 to move, so as to open or close the buffer housing 1 and the measurement housing 2.

[0064] It should be noted that during measurement, the drive mechanism 74 drives the first closed door 71 and the second closed door 72 to close. Sealing rings are provided at the door frame positions of the buffer housing 1 and the measuring housing 2. When the first closed door 71 and the second closed door 72 are closed, the silicone sealing rings between the first closed door 71 and the second closed door 72 and the buffer housing 1 and the measuring housing 2 respectively are compressed, so that the interior of the buffer housing 1 and the measuring housing 2 is isolated from the outside, ensuring that the airflow purification mechanism 5 can establish a stable pressure gradient.

[0065] In the pick-up and put-down state, the first closed door 71 and the second closed door 72 are opened simultaneously to expose the positioning groove 4 inside the measuring housing 2, which facilitates the pick-up and put-down of IoT devices. At this time, the airflow purification mechanism 5 is still working, and most of the airflow is discharged through the first closed door 71 and the second closed door 72, which can reduce the backflow of external dust.

[0066] Example 2: The technical solution in this example differs from that in Example 1 in that: Please refer to... Figures 8-12The drive mechanism 74 includes a connecting shaft 742, a pair of mounting blocks 741, a slider 743, a gear 744, and a drive component 746. The pair of mounting blocks 741 are fixed to the first closed door 71, and the connecting shaft 742 is fixed between the pair of mounting blocks 741. The slider 743 is rotatably connected to the mounting blocks 741 about the axis of the connecting shaft 742, and a torsion spring is provided between the slider 743 and the mounting blocks 741. When the torsion spring loses its restraint, it drives the first closed door 71 to maintain its closed position against the buffer housing 1. The gear 744 is... The shaft is fixed to the connecting shaft 742, the drive component 746 is mounted on the mounting base, and the output end of the drive component 746 is connected to the slider 743. The slider 743 is slidably connected to the mounting base, and the mounting base has a toothed groove 745 adapted to the gear 744. When the slider 743 drives the slider 743 to move, it drives the gear 744 to align with the toothed groove 745. As the gear 744 continues to move and mesh with the toothed groove 745, the first closed door 71 and the second closed door 72 can be rotated through the toothed groove 745, so that the buffer housing 1 and the measuring housing 2 can be opened.

[0067] It should be noted that the driving component 746 pushes the slider 743 to move, which in turn drives the first closed door 71 and the second closed door 72 to move. When the second closed door 72 moves to the outside of the buffer housing 1, as the slider 743 continues to move, it drives the gear 744 on the connecting shaft 742 to mesh with the tooth groove 745 of the mounting base. When the gear 744 rotates, it drives the first closed door 71 and the second closed door 72 to rotate through the mounting block 741, realizing the opening action. When the first closed door 71 and the second closed door 72 rotate, the torsion spring is compressed. When the first closed door 71 and the second closed door 72 are driven to close, firstly, with the cooperation of the gear 744 and the tooth groove 745, the first closed door 71 and the second closed door 72 are driven to rotate and reset. The torsion spring releases elastic potential energy, so that the first closed door 71 and the second closed door 72 are aligned with the buffer housing 1 and the measuring housing 2 respectively. As the slider 743 moves, it drives the first closed door 71 and the second closed door 72 to close with the buffer housing 1 and the measuring housing 2 respectively.

[0068] Please see Figure 4 and Figure 8 The inner wall of the buffer housing 1 is provided with three sets of L-shaped support members 8, which are equally spaced around the axis of the measuring housing 2. One end of the L-shaped support member 8 is fixed to the inner side wall of the buffer housing 1 by bolts, and the other end of the L-shaped support member 8 maintains a gap with the outer side wall of the measuring housing 2. A polytetrafluoroethylene connecting block is embedded between the L-shaped support member 8 and the measuring housing 2, allowing the two cavities to undergo slight thermal expansion and contraction displacement due to temperature changes.

[0069] It should be noted that the ends of the three sets of L-shaped support members 8 maintain a 0.5mm gap with the outer wall of the measuring housing 2, which limits the radial displacement of the measuring housing 2 and ensures that the width of the annular gap 51 is uniform; the polytetrafluoroethylene connecting block between the L-shaped support member 8 and the measuring housing 2 can slide axially. When the temperature changes cause thermal expansion and contraction of the two housings, the polytetrafluoroethylene connecting block is allowed to move relative to each other to avoid deformation caused by structural stress.

[0070] The positioning function of the L-shaped support 8 can reduce the width deviation of the annular gap 51, avoid airflow speed fluctuations caused by uneven annular gap 51, and ensure stable dustproof effect; and the compensation function of the polytetrafluoroethylene connecting block enables the device to work stably in the production line environment with complex temperature changes, and improve the temperature adaptability range.

[0071] Please see Figures 1-13 A laser measurement-assisted method for manufacturing Internet of Things (IoT) devices, using the aforementioned laser measurement-assisted device for manufacturing IoT devices; specifically including the following steps:

[0072] Step 1, Airflow purification: Between the buffer housing 1 and the measuring housing 2, a spiral downward clean airflow is generated by the airflow purification mechanism 5; this airflow movement allows some of the clean airflow to be smoothly introduced into the measuring housing 2 through the bottom and then discharged from the top of the measuring housing 2, so as to maintain a clean space inside the measuring housing 2.

[0073] Step 2, Vibration dust removal: The dust removal mechanism 6 drives the measuring housing 2 to vibrate, and the vibration of the measuring housing 2 will cause the window 3 to vibrate synchronously; thereby removing the dust accumulated on the window 3.

[0074] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices, characterized in that, include: Buffer housing (1), the buffer housing (1) is located directly below the laser measuring instrument; A measuring housing (2) is disposed inside a buffer housing (1). The top end of the measuring housing (2) is connected to the inner wall of the top end of the buffer housing (1) via a mounting ear. Both the top end of the buffer housing (1) and the measuring housing (2) are provided with windows (3), and the two windows (3) are coaxially aligned. The optical path channel of the laser measuring instrument is aligned with the IoT device under test through the windows (3) on the buffer housing (1) and the measuring housing (2), so that the optical path of the laser beam from the window (3) to the surface of the measured part is entirely within the buffer housing (1). And an airflow purification mechanism (5), which is disposed between the buffer housing (1) and the measuring housing (2) and is used to form an airflow pressure difference in the buffer housing (1) and the measuring housing (2) to prevent external dust from entering; The measuring housing (2) is provided with a dust removal mechanism (6) for cleaning the dust accumulated in the window (3) on the measuring housing (2).

2. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 1, characterized in that: The airflow purification mechanism (5) includes an airflow control mechanism (58); an annular gap (51) is formed between the inner wall of the buffer housing (1) and the outer wall of the measuring housing (2); three air inlets (53) are provided on the side wall near the top of the buffer housing (1); multiple first slits (55) are provided at the bottom of the measuring housing (2), and the first slits (55) are arranged in a circumferentially evenly spaced array around the axis of the measuring housing (2); multiple second slits (56) are provided at the bottom of the measuring housing (2). The second gap (56) is arranged in a circumferentially spaced array around the axis of the measuring housing (2) at the connection position between the measuring housing (2) and the window (3); the bottom of the buffer housing (1) is provided with an air outlet (57); the airflow control mechanism (58) is located between the top of the buffer housing (1) and the measuring housing (2) and is used to generate airflow spiraling downward along the annular gap (51); part of the spiraling downward airflow is discharged through the air outlet (57) and part enters the measuring housing (2) through the first gap (55); A guide ring (52) is provided on the inner side of the top of the buffer housing (1). The outer ring of the guide ring (52) is adapted to the inner wall of the buffer housing (1), and the inner ring of the guide ring (52) has an arc transition surface.

3. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 2, characterized in that: The air inlet (53) is provided with a filter screen (54), and the surface of the filter screen (54) is coated with an oleophobic coating; a pre-filter layer is provided on the outside of the filter screen (54) and is used to intercept large dust particles.

4. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 2, characterized in that: The airflow control mechanism (58) includes a pair of miniature fans (582) mounted on the inner wall of the top of the buffer housing (1) via a mounting bracket (581); the air outlets of the miniature fans (582) are tilted at 45° toward the window (3) of the measuring housing (2), forming an airflow spiraling downward along the wall of the measuring housing; An airflow sensor is installed in the annular gap (51) to achieve closed-loop wind speed control.

5. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 1, characterized in that: The dust removal mechanism (6) includes multiple ultrasonic transducers (61); the multiple ultrasonic transducers (61) are arranged in a circular array at equal intervals around the axis of the measuring housing (2) at the bottom of the measuring housing (2); a laser scattering dust sensor is installed on the top of the measuring housing (2) and is used to detect the dust concentration in real time. When the particle concentration exceeds the standard, the micro fan (582) is automatically triggered to speed up and the dust removal mechanism (6) performs ultrasonic cleaning.

6. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 1, characterized in that: A sealing mechanism (7) is provided between the buffer housing (1) and the measuring housing (2); when the IoT device under test is placed or removed, the buffer housing (1) and the measuring housing (2) are allowed to be opened through the sealing mechanism (7); when laser measurement is performed, the buffer housing (1) and the measuring housing (2) are isolated from the outside through the sealing mechanism (7) so that the airflow purification mechanism (5) can perform airflow purification.

7. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 6, characterized in that: The closing mechanism (7) includes a first closing door (71), a second closing door (72), a driving mechanism (74), and multiple connecting rods (73); the first closing door (71) is disposed on the buffer housing (1), the second closing door (72) is disposed on the measuring housing (2), and the first closing door (71) and the second closing door (72) are connected by multiple connecting rods (73); the driving mechanism (74) is mounted on the buffer housing (1) by a mounting bracket and is used to drive the first closing door (71) and the second closing door (72) to move, so as to open or close the buffer housing (1) and the measuring housing (2).

8. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 7, characterized in that: The drive mechanism (74) includes a connecting shaft (742), a pair of mounting blocks (741), a slider (743), a gear (744), and a drive component (746); the pair of mounting blocks (741) are fixed to the first closed door (71), and the connecting shaft (742) is fixed between the pair of mounting blocks (741); the slider (743) is rotatably connected to the mounting block (741) about the axis of the connecting shaft (742), and a torsion spring is provided between the slider (743) and the mounting block (741); when the torsion spring loses its restraint, the torsion spring is used to drive the first closed door (71) to maintain its closed position against the buffer housing (1); the gear (744) The drive unit (746) is coaxially fixed to the connecting shaft (742), and the output end of the drive unit (746) is connected to the slider (743). The slider (743) is slidably connected to the mounting frame, and the mounting frame has a tooth groove (745) adapted to the gear (744). When the slider (743) drives the slider (743) to move, it drives the gear (744) to align with the tooth groove (745). As the gear (744) continues to move and mesh with the tooth groove (745), the first closed door (71) and the second closed door (72) can be rotated through the tooth groove (745) so that the buffer housing (1) and the measuring housing (2) can be opened.

9. The laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices according to claim 1, characterized in that: The inner wall of the buffer housing (1) is provided with three sets of L-shaped support members (8), and the three sets of L-shaped support members (8) are arranged at equal intervals around the axis of the measuring housing (2); one end of the L-shaped support member (8) is fixed to the inner wall of the buffer housing (1) by bolts, and the other end of the L-shaped support member (8) maintains a gap with the outer wall of the measuring housing (2); A polytetrafluoroethylene connecting block is embedded between the L-shaped support (8) and the measuring housing (2), allowing the two cavities to undergo slight thermal expansion and contraction displacement due to temperature changes.

10. A laser measurement-assisted method for manufacturing Internet of Things (IoT) devices, characterized in that: Using a laser measurement auxiliary device for manufacturing Internet of Things (IoT) devices as described in any one of claims 1-9; specifically including the following steps: Step 1, airflow purification: Between the buffer housing (1) and the measuring housing (2), a spiral downward clean airflow is generated by the airflow purification mechanism (5); this airflow movement mode allows some clean airflow to be smoothly introduced into the measuring housing (2) through the bottom and then discharged from the top of the measuring housing (2) so as to maintain a clean space inside the measuring housing (2); Step 2, Vibration dust removal: The dust removal mechanism (6) drives the measuring housing (2) to vibrate, and the vibration of the measuring housing (2) will drive the window (3) to vibrate synchronously; thereby removing the dust accumulated on the window (3).

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