68results about How to "Easy for visual inspection" patented technology

The invention discloses a novel welding process for combining submerged-arc welding with CO2 gas shielded welding. A welding power supply, a control box and a welding tractor of submerged-arc welding are adopted, a welding gun of CO2 gas shielded welding is arranged on the welding tractor, but CO2 gas is not used; and by using a welding wire of the gas shielded welding and a welding flux of the submerged-arc welding, a backing welding layer and a cosmetic welding layer of a working seam are welded through a wire feeding mechanism and the welding gun of the CO2 gas shielded welding. The invention improves the comprehensive mechanical property of the whole seam, ensures that the surface of the seam is formed smoothly and attractively, is beneficial to appearance detection, has improved welding process parameters compared with other welding methods, and can ensure effective weld penetration, low cost and high production efficiency.

The invention discloses a ratiometric fluorescent probe based on ion imprinting, preparation and application thereof. The fluorescent probe takes a red quantum dot as the core and is embedded in a silicon dioxide nanoparticle, then amination modification is performed on the surface of the silicon dioxide nanoparticle, and the amination modified surface is covalently coupled with a green quantum dot to obtain the ratiometric fluorescent probe based on ion imprinting. The ratiometric fluorescent probe detects metal ions based on ratiometric ion imprinting of quantum dots, has excellent specificity, good stability, simple preparation, cheap price and the like, greatly shortens the reaction time, reduces detection of cadmium ions to 25nM, and provides convenience for visualized quick detection.

The invention discloses a fluorescent probe, an enhanced ratio fluorescence sensor, a method and application. The fluorescent probe is used for detecting tetracycline antibiotics, and is prepared by dispersing a zeolite imidazate skeleton ZIF-8 into an aqueous solution of terpyridyl ruthenium chloride hexahydrate and reacting, wherein the fluorescent probe has an emission peak of red fluorescence at the wavelength of 604 nm, the fluorescent probe generates an emission peak of green fluorescence at the wavelength of 512 nm for the tetracycline antibiotics, and the particle size of the fluorescent probe is 73-83 nm. Herein, the enhanced ratio fluorescence sensor is used for detecting tetracycline antibiotics, has very important significance and application value for monitoring tetracycline antibiotic residues in drinking water and food, so that the fluorescent probe has the advantages of sensitivity, accuracy, rapidness, simplicity in operation and convenience in visualization.

Disclosed herein is a stacked package. The stacked package includes two or more of a first BGA package and a second BGA package and a circuit board having a circuit pattern. The first BGA package is mounted on one face of the circuit board, and the second BGA package is mounted on the other face of the circuit board. A signal connection member is provided for transmitting signals of the first BGA package and the second BGA package to each other. The second BGA package is provided with a signal connection pad. One end of the signal connection member is bonded to the signal connection pad and the other end of the signal connection member is bonded to the circuit pattern of the circuit board. A method of fabricating the stacked package is also disclosed.

What is disclosed is a system and method for detecting cancerous tissue in breast tissue using a thermal image. In one embodiment, the present tumor detection method involves selecting a region of interest in the thermal image to be processed for breast cancer screening. Thereafter, a percentage of pixels p1 in the selected region having a temperature Tpixel1, where T1≦Tpixel1≦T2, is determined. A percentage of pixels p2 in the selected region having a temperature Tpixel2, where T3T≦Tpixel2, is determined. A ratio p3=Pedge / Pblock is also determined, where Pedge is a number of pixels around a border of a suspected tumor within the selected region, and Pblock is a number of pixels in a perimeter of the selected region. A decision fusion rule R, as more fully disclosed herein, is utilized to determine, based on these determination whether tissue within that region is cancerous, or non-cancerous, or is suspicious of being cancerous.

The present invention relates to a railroad crossing (2). The railroad crossing (2) includes a railroad (4) along which a train can travel. The railroad crossing (2) further includes a road (6) extending across the railroad (4) and along which a vehicle or automobile can travel. The road (6) includes a curved approach (8) to the railroad (4). The curved approach (8) is effective in encouraging a reduction in speed of the vehicle without seriously disrupting vehicle traffic flow. The railroad crossing (2) further includes a movable vehicle impact barrier (10) which can prevent the vehicle from crossing the railroad (4). The road (6) may include two separated traffic lanes (16a, 16b) in which vehicles travel in opposite directions, and this separation of the lanes (16) deters the vehicle from being driven from one lane 16a and into the other lane (16b) in an attempt to circumvent the barrier (10).

The invention discloses a full-automatic one-step forming system for an assembly-type building steel beam, and belongs to the technical field of steel beam machining. The full-automatic one-step forming system for the assembly-type building steel beam comprises a conveying mechanism, wherein the conveying mechanism is sequentially connected with a pre-assembly mechanism, a first aligning welding mechanism, an overturning abutting assembly mechanism and a second aligning welding mechanism; and the conveying mechanism is further connected with a welding detection mechanism. According to the full-automatic one-step forming system for the assembly-type building steel beam, the welding detection mechanism provides a midway detection process for the welding forming process of the steel beam, welding slag removal and welding seam detection are performed on T-type steel composed of a web and first wing plates, subsequent forming work for unqualified T-type steel can be terminated, therefore, aguarantee is provided for the effectiveness of the subsequent forming work, and unnecessary operational wearing of equipment is reduced; and meanwhile, the unqualified T-type steel is stopped from being formed subsequently, so that the protection of the unqualified T-type steel is achieved, and the T-type steel is not prone to being further damaged or even destroyed in a subsequent welding process.

The invention discloses an appearance detection device for a chemical fiber spinning cake. The problems are solved that in the prior art, an alone-fixed spinning cake is subjected to appearance inspection with a multi-angle and multi-direction camera and equipment resource consumption is large. The device includes a chassis and an outer cover, a conveying mechanism for conveying a tray is arrangedon the chassis, the spinning cake is arranged on the tray, a top visual inspection module and a side visual inspection module are arranged in the conveying direction of the conveying mechanism, a rotating mechanism is arranged on the upper portion of the side visual inspection module, and a push mechanism is arranged on one side of the conveying mechanism. The device achieves automatic detectionof defects of the outer part of the chemical fiber spinning cake, the spinning cake is conveyed on the conveying mechanism, the top visual inspection module is used for detecting the top of the spinning cake, and the side visual inspection module is used for detecting the side face of the spinning cake. Compared with a traditional device for detecting alone-fixed spinning cake with multi-angle andmulti-direction cameras, the device is simpler and more reasonable in structure, the detection efficiency is high, and energy is saved.

The polarizing plate, the screen module and the preparation method of the screen module provided by the present invention relate to the field of semiconductor device manufacturing, all of which can be based on the traditional structure of the screen module, by arranging the adhesive layer between the polarizing plate and the protective film Even if the polarizer is directly attached to the touch panel, it can not only minimize the pollution damage to the device structure during the manufacturing process, but also facilitate visual inspection, so that the contaminated device structure can be found in time to continue Subsequent rework operation; In addition, in the above-mentioned rework operation process, the thicker optical adhesive layer is generally separated, and since the polarizer is attached to the touch panel during the separation operation, It can effectively protect the touch sensor on the touch panel from damage, thereby effectively improving the efficiency of heavy industrial operations and greatly reducing production costs.

The invention discloses a single butt-joint boxing and sealing system and method for multiple brands of cigarettes. A cigarette lifting machine, a flat-to-vertical device and a multi-way chain plate conveyor are sequentially mounted behind multiple winding units. The multi-way chain plate conveyor is provided with a cigarette division and channel selection mechanism, and the cigarette division andchannel selection mechanism is connected with a multi-way sliding-down mechanism. Each sliding way of the multi-way sliding-down mechanism is connected with the front end of a single-way transverse conveyor. The rear end of the single-way transverse conveyor is connected with the front end of a single-way longitudinal conveyor. The rear end of the single-way longitudinal conveyor is connected toa cigarette stacking mechanism. The stacking mechanism is composed of multiple stacking devices. A cigarette stack transfer mechanism is arranged on the outer sides of the stacking devices. A cigarette stack temporary storage device is arranged between the cigarette stack transfer mechanism and the stacking mechanism. The cigarette stack transfer mechanism cooperates with a boxing and sealing machine so as to achieve final boxing of cigarettes. The function of packaging the multiple brands of cigarettes through the single boxing and sealing machine can be achieved, and the equipment efficiencyis greatly improved; and meanwhile the cigarette stack temporary storage device used when the system breaks down is arranged.

The invention discloses a static-conducting and anti-corrosive coating and a preparation method thereof. The static-conducting and anti-corrosive coating comprises bisphenol A epoxy resin, a reactive diluent, rutile titanium dioxide, conductive mica powder, a coupling agent and a flexibilizer. The bisphenol A epoxy resin is ground; the reactive diluent, the flexibilizer, the coupling agent and a light-colored static-conducting material are added; and the coating free of an inertial and volatile solvent is prepared. The coating has the characteristics of high cohesion, good closure and stable static conductivity, is suitable for internal anti-corrosive and static-conducting protection of oil storage and transport equipment such as an oil storage tank, an oil transport pipeline and an oil transport tank in the petrochemical industry, and is also suitable for anti-corrosive and anti-static protection of a gas tank, a water gate and an underground pipeline.

A diagnostic technique allows an easy visual detection of poor media advance calibration. The diagnostic technique employs a print mode that prints different areas of the plot at different passes with a controlled amount of advances between them. The dot positioning error in the different areas has a non-systematic nozzle contribution, that tends to cancel out, and a systematic contribution due to the accumulative media advance error. Different patterns can be used to make the dot positioning error due to the accumulative media advance error show up. By increasing the number of media advances between the printing of sets of pixels, e.g. pixels in a horizontal line, the effect of accumulated errors and the apparent visual effect is increased.

An overhead railway and trolley for transporting miners out of a mine. The railway is formed by connected rails that are mounted to a roof of a mine. The trolley is mounted to a bottom flange of the rails and includes wheel assemblies having at least two wheels mounted side-by-side, and each is configured to engage and roll along a top surface of the bottom flange. The trolley has a clicker that is configured to engage protrusions extending away from the bottom flange. The clicker permits the trolley to travel out of the mine but prevents it from traveling into the mine. The trolley also includes a pair of handles that are configured to be gripped by a miner standing on a floor of the mine as he travels from the beginning of the railway to the ending (i.e., the egress direction).

A visualized miRNA detecting method by utilizing an exonuclease reaction to generate primers and dendritic rolling circle amplification is disclosed. The method includes three steps. The first step is a step of primer generation, wherein after a hairpin-structured probe I is opened by a target miRNA, a single-chain part is degraded by an exonuclease I, and then RNA in a DNA:RNA hybrid chain is degraded by ribonuclease H to leave a short-chain DNA segment. The second step is a step of dendritic rolling circle amplification, wherein the single-chain DNA generated in the former step is connected to a long single-chain DNA probe to form a ring adopted as a template, first-stage rolling circle amplification is performed by adopting the single-chain DNA as a primer, and a hairpin-structured stem-loop structure II introduced into a rolling circle amplification system is opened by a product of the first-stage rolling circle amplification, thus performing multi-stage dendritic rolling circle amplification. The third step is a step of performing detection based on a G-quadruplex in a product of the rolling circle amplification. The method is a sensitive, economical, convenient and in-situ visualized miRNA detecting method.

The invention provides an automatic oil recharging device, and relates to an industrial lubricant injecting and recharging device. The automatic oil recharging device comprises an upper oil storage cup and a lower oil storage cup. Spare oil quantity scales are marked on the outer wall of the upper oil storage cup. A guiding rod is arranged inside the upper oil storage cup. A conical plug, a conical compression spring and a compression spring base are arranged at the portion, at the lower end of the guiding rod, inside the lower oil storage cup. An oil outlet is formed in the left side of the lower oil storage cup. A pressure balancing pipe is installed on the right side of the lower oil storage cup. Circular oil level inspection windows are formed in the front side and the rear side of the lower oil storage cup. Due to the adoption of the technical scheme, compared with the prior art, the automatic oil recharging device has the advantages that the visual area is large, oil levels are clear, the structure is exquisite, the sealing performance is good, the appearance is attractive and elegant, the lower oil storage cup is not prone to aging, and is not easily discolored or broken, the mechanical strength is high, and the threaded strength is high.

A diagnostic technique allows an easy visual detection of poor media advance calibration. The diagnostic technique employs a print mode that prints different areas of the plot at different passes with a controlled amount of advances between them. The dot positioning error in the different areas has a non-systematic nozzle contribution, that tends to cancel out, and a systematic contribution due to the accumulative media advance error. Different patterns can be used to make the dot positioning error due to the accumulative media advance error show up. By increasing the number of media advances between the printing of sets of pixels, e.g. pixels in a horizontal line, the effect of accumulated errors and the apparent visual effect is increased.

The invention relates to the technical field of universal spherical joint production, in particular to a spherical shell feeding detection device for universal spherical joint production. The spherical shell feeding detection device comprises a spherical shell linear conveyor, a locating air cylinder, a spherical shell detector, a spherical shell connecting containing frame and a detection and clamping assembly. Locating holes are formed in the left portion of the spherical shell linear conveyor. The locating air cylinder is located on the left side of the spherical shell linear conveyor through a locating and detection supporting frame. A locating pin is arranged on the moving portion of the locating air cylinder and is matched with the locating holes. The spherical shell detector is arranged on a rack through a detection support and is located above the spherical shell linear conveyor and used for visually detecting spherical shell quality. The detection and clamping assembly is usedfor clamping and transferring unqualified spherical shells. The spherical shell connecting containing frame is connected to the rear end of the spherical shell linear conveyor. The spherical shell feeding detection device has the advantages that the product quality of fed spherical shells is improved, and the assembly quality of spherical shells and spherical heads is improved.

The invention relates to a method and a corresponding device for removing foreign bodies in tobacco manufacturing, in particular to a method and device for removing the tobacco foreign bodies based on vision and belongs to the device for removing the foreign bodies based on vision. The method and device are mainly suitable for the impurity removal process of various industrial processing. According to the method and device, firstly a tobacco material is conveyed while being vibrated so that the tobacco material can be dispersed and evenly distributed, then acceleration vibration conveying is conducted so that the material can be subjected to single-layer processing, then the tobacco material enters a constant-speed conveyor belt, real-time images of tobaccos are shot by lattice CCD cameras and transmitted to a digital processing unit for analyzing and processing of grayscale signals of the images, and the positions of the foreign bodies are confirmed; and corresponding solenoid valves on the positions at the time point are controlled to be opened, the conveyed material is laterally blown by compressed air, and the foreign bodies are blown off and fall into foreign body hoppers on the two sides of the belt. According to the method and device, intelligent automatic equipment which integrates light, machinery, electricity and gas is adopted for foreign body removal, foreign body removal is quite reliable, the working efficiency is high, and the percent of pass of cigarettes is increased greatly.

The invention relates to a TEE authentication key detection method and a system. The method comprises the following steps: receiving a TEE authentication key detection request; detecting an EC key anddetecting an RSA key; if the detection of the EC key succeeds and the detection of the RSA key succeeds, prompting that the key detection key is successful; otherwise, prompting that the key detection fails. The TEE authentication key detection method and system of the present invention are applied to the mass production of Android product. When the TEE authentication key detection method and system are applied to the mass production of Android products, factory production line is provided with Trusty TEE Attestation Key (TTEE Authentication Key) detection to improve production line efficiency and product yield, to ensure that Google certification test is passed smoothly.

Provided are a coloration agent for carbonyl sulfide which contains a metal oxide, and at least one metal component selected from among a cerium component, a silver component, a copper component, a nickel component, and an iron component, the metal component being supported on the metal oxide, or which contains at least one metal oxide selected from among a cerium oxide, a silver oxide, a copper oxide, a nickel oxide, and an iron oxide; carbonyl sulfide detection means including the coloration agent for carbonyl sulfide; and a fuel cell system including the detection means. The coloration agent for carbonyl sulfide has the ability to develop a color in the presence of carbonyl sulfide even at ambient temperature, exhibits excellent performance in detecting carbonyl sulfide contained in a hydrocarbon fuel, and enables the service life of a desulfurizing agent to be determined through visual observation.

The invention relates to the technical field of supramolecular recognition, and discloses a preparation method and application of a constructed metal-organic limited domain structure based on a flexible ligand. Ce3+, Eu3+ or Tb3+ which are provided with certain coordination modes in rare earth metal salt are taken as nodes, and a metal-organic clathrate compound of a flexible limited domain cavitystructure is prepared by regulating and controlling the proportion of coordination sites to metal nodes in the ligand and utilizing a poor solvent diffusion method or layering diffusion method. Flexible functional groups are introduced in the target material to strengthen the interaction effect between limited range host molecules and guest small molecules, can show adaptive ability similar to 'abreath effect' in the supramolecular interaction process, and can show excellent selective recognition on natural small molecules with similar structures and sizes. Compared with the prior art, the method has the advantages of good adaptability, high supramolecular interaction, high concentrated selectivity, convenient visual detection and the like and has a better application prospect in the fields of molecular recognition, fluorescence probes and the like.

The invention discloses a vision detection device of an aluminum substrate. The vision detection device comprises a machine frame, wherein a conveying belt is arranged on the machine frame; a first movement platform is arranged on a first transverse rod; a second electric telescopic rod is arranged at the lower end of the first movement platform; a first vision detector is arranged at the lower end of the second electric telescopic rod through a first installation plate; a second movement platform is arranged on a second transverse rod; a fourth electric telescopic rod is arranged at the lowerend of the second movement platform; a second vision detector is arranged at the lower end of the fourth electric telescopic rod through a second installation plate; an infrared sensor is arranged atthe lower end of a third transverse rod; a first rubber block and a second rubber block are arranged on the conveying belt; a first support plate is arranged on the first rubber block; a first rotaryshaft is arranged on the first support plate; a first clamp plate is arranged at the right end of the first rotary shaft; a second support plate is arranged on the second rubber block; a fixed plateis arranged at the left end of the second support plate through a fifth electric telescopic rod; a second clamp plate is arranged at the left end of the fixed plate through a second rotary shaft. Thevision detection device has the advantages that the detection effect is good, and the product quality is guaranteed.

The invention belongs to the technical field of LED patch support appearance detection, and particularly relates to LED patch support appearance defect automatic detection equipment and a detection method. The LED patch support appearance defect automatic detection equipment comprises a rack, a set of conveying rollers are rotationally arranged in the rack in the length direction of the rack, and a conveying belt is in transmission connection with the exterior of the conveying rollers; supporting columns are connected to the four corners of the lower end face of the rack, a bearing plate is connected between the supporting columns, two sets of stand columns are symmetrically arranged on the upper end face of the rack, the top ends of the stand columns are jointly connected with a top plate, a sliding frame is arranged on the stand columns, and rolling wheels attached to the stand columns are arranged in the sliding frame. The LED patch support is fixed through the clamping plate, the LED patch support can be overturned through the overturning structure, appearance detection can be conveniently conducted on all faces of the LED patch support through the detection head, the accuracy of appearance detection is remarkably improved, meanwhile, the automation degree is better, and the efficiency of appearance detection of the LED patch support is improved.

The embodiment of the invention discloses a visual inspection device. The visual inspection device comprises a main body, a visual inspection module and a workpiece grabbing mechanism, the visual detection module is arranged on the main body; the visual detection module comprises a first detection unit, a second detection unit and a third detection unit; the first detection unit is used for carrying out appearance detection on the top wall of a to-be-detected product, the second detection unit is used for carrying out appearance detection on the bottom wall of the to-be-detected product, and the third detection unit is used for carrying out appearance detection on the side wall between the top wall and the bottom wall of the to-be-detected product; and the workpiece grabbing mechanism is used for grabbing the to-be-detected product and moving among the first detection unit, the second detection unit and the third detection unit. One technical effect of the embodiment of the invention is that the structural design is reasonable, the whole appearance of the to-be-detected product can be accurately detected through the three detection units, the detection precision is high, and the application range is wide.

The invention discloses a novel welding process for combining submerged-arc welding with CO2 gas shielded welding. A welding power supply, a control box and a welding tractor of submerged-arc welding are adopted, a welding gun of CO2 gas shielded welding is arranged on the welding tractor, but CO2 gas is not used; and by using a welding wire of the gas shielded welding and a welding flux of the submerged-arc welding, a backing welding layer and a cosmetic welding layer of a working seam are welded through a wire feeding mechanism and the welding gun of the CO2 gas shielded welding. The invention improves the comprehensive mechanical property of the whole seam, ensures that the surface of the seam is formed smoothly and attractively, is beneficial to appearance detection, has improved welding process parameters compared with other welding methods, and can ensure effective weld penetration, low cost and high production efficiency.

The embodiment of the invention discloses a magnetic attraction conductive track and lighting equipment, the magnetic attraction conductive track is used for being assembled on a mounting base and can form magnetic attraction and electric connection with a lighting device, and the magnetic attraction conductive track comprises a mounting main body and a pair of conductive substrates. The conductive substrate comprises a magnetic attraction layer, an insulating layer and a conductive layer, the magnetic attraction layer faces the mounting side of the mounting main body, the conductive layer faces the connecting side of the mounting main body and is exposed to the outside so that the lighting device can take electricity, and the magnetic attraction layer can be used for being connected with the lighting device in an attraction mode. According to the magnetic attraction conductive track, the conductive substrate is used, the conductive function is achieved, meanwhile, the magnetic attraction attribute is achieved, the conductive structure and the magnetic attraction structure are integrated, the assembly process is simplified, and the cost is lower; meanwhile, the electricity taking mode of the conductive substrate on the lower portions of the two sides of the guide rail can facilitate visual detection.

The invention relates to a quick quality inspection combination tooling for surface mount diodes. The quick quality inspection combination tooling comprises a mother board and a male board. A plurality of round holes with bottoms not penetrating through a low end face of a board body are uniformly distributed on the female board body, and a limit frame is arranged on a lateral side of an upper end face of the female board. A plurality of round holes with bottoms not penetrating through a low end face of a male board body are uniformly distributed on the male board body, the diameter of the round holes of the male board is the same as the diameter of the round holes of the mother board, and the male board body can just be embedded into the limit frame of the female board. A plurality of surface mount diodes are placed on the female board body, the female board body is sifted left and right, so that the surface mount diodes vertically fall into the round holes of the female board body, and a long shaft end face of each surface mount diode faces upwards so as to be convenient for visual inspection. After the inspection, the male board is invertedly placed on the female board, so that the male board can just be embedded into the limit frame of the female board, the round holes of the male board correspond to the round holes of the female board, after the overall board is turned over, the other long shaft end face of the surface mount diode faces upwards, and inspection of the other long shaft end face of the surface mount diode is achieved.

The invention discloses a lighting device, a machine vision device and a lighting adjusting method. The lighting device comprises line light sources and reflection modules; distances between the linelight sources and a target lighting area are preset distances, included angles between the optical-axis light rays in the width directions of the line light sources and the target lighting area are preset included angles, and the preset distances and the preset included angles are arranged to allowing lighting light intensity perpendicular to the length directions of the line light sources in thetarget lighting area to be even; the reflection modules are arranged at the ends in the length directions of the line light sources, and are arranged to be emergent light for reflecting the line lightsources so that the lighting light intensity in the length directions along the line light sources in the target lighting area can be even. According to the lighting device, the machine vision deviceand the lighting adjusting method in the technical scheme, large-area even lighting can be achieved.

The invention relates to appearance inspection and automatic reversing integrated equipment of an oil tube connecting piece. The appearance inspection and automatic reversing integrated equipment comprises a worktable, the worktable is provided with a visual inspection device, a product slide way is arranged on the right side of a tail end of a direct vibration component, a detection station is arranged at the middle of the product slide way, the visual inspection device is located on the rear side of the detection station, a material stirring device is arranged on the front side of the product slide way, a front face and back face overturning device is arranged on the right side of the visual inspection device, a reserving fixture is arranged on the right end of the product slide way, a reserving power device is arranged on the right end of the reserving fixture, a push and press locating component is arranged on the front side of the reserving fixture, and a fine tuning component isarranged on the lower side of the reserving power device; and the front face and back face overturning device of the appearance inspection and automatic reversing integrated equipment overturns a product with an upward back face for 180 degrees, the reserving power device rotates the product from a horizontal state to a vertical state, the push and press locating component pushes and presses the product on the inner wall of the reserving fixture to achieve the accurate locating of the product, thereby providing a basic guarantee for the subsequent performance detection and improving the performance detection quality and efficiency, and accordingly, the appearance inspection and automatic reversing integrated equipment has a good market application value.

The invention relates to a rapid quality control board for surface-mounted diodes. The rapid quality control board comprises a board body and has the following innovation points: a plurality of circular holes are distributed on the upper end surface of the board body uniformly, wherein the bottoms of the circular holes do not penetrate through the lower end surface of the board body, and the diameters of the circular holes are slightly larger than the distance of a diagonal line of the long-axis end surface of the surface-mounted diodes. A plurality of surface-mounted diodes are arranged on the board body, and the board body is in jigging motion horizontally, so that the surface-mounted diodes fall into the circular holes of the board body respectively, and the long-axis end surface of each surface-mounted diode faces upwards, so that the appearance test can be carried out conveniently; and simultaneously, the number of the circular holes in each board body is fixed, and after the circular holes are fully filled by the surface-mounted diodes, the number of the surface-mounted diodes can be determined rapidly, and the weighing efficiency is improved.