56 results about "Black paint" patented technology

The invention relates to a reflective high-precision high-power laser optical axis calibration method, which comprises the following steps of: coarse alignment: enabling a reflecting light plate and an emergent light plate to be visible on a black paint plate; adjusting the posture of the reflector, and moving the reflection light spot; calculating a light spot center position by an image, and establishing an angle and position function relationship; the deviation angle is inversely calculated through the position difference, and the reflector is strictly perpendicular to the optical axis. According to the reflective high-precision high-power laser optical axis calibration method, on the premise that an oversized and overweight laser is not moved, other elements are moved, calibration of the laser optical axis is completed under the condition that the requirement for the spatial distance is not large, vibration can be reduced, and devices can be protected.

The utility model provides a machining jig for a motor shell. The machining jig comprises a jig template, the upper surface of the jig template is provided with a plurality of mounting grooves which are transversely and longitudinally arranged at intervals; the mounting grooves are configured to be profiling grooves matched with the motor shell in shape, air channels are formed in the mounting grooves, and the air channels are formed in the upper surfaces of the mounting grooves in a sunken mode; the air channels between the adjacent mounting grooves which are longitudinally spaced are mutually connected and communicated to form the same air channel, the jig template is provided with an air inlet groove communicated to the air channel, and the air inlet groove is used for being externally connected with a vacuumizing air pipe; by adopting the profiling groove matched with the motor shell in shape, it is ensured that the shell can be accurately embedded into the jig template, the fixing stability is improved, the profiling groove enables the shell not to be prone to displacement in the machining process, and the subsequent machining accuracy is ensured; and mechanical clamping is not needed, so that the high-brightness black paint-sprayed surface of the motor shell is effectively prevented from being scratched or indented, and the appearance quality of the shell is kept.

The invention relates to the field of waste gas treatment, and discloses a volatile gas treatment device for petroleum processing, the volatile gas treatment device comprises a temperature control assembly arranged outside a catalytic chamber, the temperature control assembly outside the catalytic chamber is composed of a mounting pipe frame, a mounting frame I, blades and an adjusting assembly, the mounting pipe frame is arranged on the outer side of the catalytic chamber, and the mounting pipe frame is hollow; the volatile gas treatment device comprises a first mounting frame, the first mounting frame is arranged on a mounting pipe frame, a plurality of blades are arranged in the first mounting frame, mirror surface stickers are arranged on the front faces of the blades, and the back faces of the blades are coated with black paint. In order to solve the problems that an existing RCO electric control temperature control is prone to faults, depends on heat preservation materials and needs extra dust removal, temperature control and dust removal integration is achieved through a sunny side adjusting assembly and double-face blades for temperature control, blade black paint and wind blocking strips for heat preservation, and a hollow pipe frame and a Venturi pipe, and the structure is simplified.

The invention relates to the technical field of visual detection, and particularly discloses a multi-light-source visual imaging device and method for a high-reflection bearing ring, and the device comprises a fixed disc which is fixedly disposed at the bottom of the inner side of a detection machine body, limiting mechanisms which are disposed at the top of the fixed disc and are distributed in an annular array, and a detection mechanism which is disposed at the top of the inner side of the detection machine body. The limiting mechanism is matched with the detection mechanism to perform visual imaging on the bearing ring so as to detect the bearing ring, the detection mechanism comprises a first barrel, and the lower end of the outer wall of the first barrel is fixedly sleeved with a telescopic sleeve. The inner wall of the bearing ring can be fully collected by the optical lens, and the soft coating nozzle coats the lens with black paint from the outer side of the lens so as to adjust the coating area and reduce the diameter of the lens, so that the bearing rings with different sizes can be imaged and used conveniently, the lens does not need to be replaced frequently, and the detection efficiency is improved.

METHOD AND PROCESS FOR VACUUM PLATING FOR BONDING PLASTICS The invention provides a method and process for vacuum plating for bonding plastics. By uniformly applying a semi-transparent primer to the back of the plastic substrate, the invention improves adhesion and cohesion between the vacuum plating and the substrate, preventing the plating from detaching or puckering during prolonged use. By using an opaque black paint as a chrome- or aluminized-type vacuum plating, the invention effectively prevents light leakage. The interposition of the semi-transparent primer between the plastic substrate and the vacuum plating enhances adhesion and cohesion, as well as resistance to hot and humid environments.Adding a protective varnish to the back increases the reliability of the bond while eliminating traces of the glue layer. Figure to be published with the abbreviation: Figure 1.

The utility model discloses a varnish permeability detection device which comprises a storage cabinet, a vehicle body, a fixing plate and a box body, a partition plate is inserted on the box body, and the partition plate divides the box body into a hot baking grid and an observation grid; a heat spotlight is arranged at the upper end of the inner side wall of the heat drying cell, and a material smearing mechanism, a pushing mechanism and an exhaust fan are further arranged on the heat drying cell; and an illuminating lamp and a black paint layer are arranged in the observation grid. According to the utility model, the hot drying grid and the observation grid are communicated and separated by the partition plate to meet the sealing requirement of heating, and meanwhile, hot air can be prevented from influencing visual observation; the material smearing mechanism is arranged, so that varnish samples can be quickly smeared, and separation and smearing can be achieved through a baffle, and the detection efficiency of the multiple varnish samples is improved; the pushing mechanism is arranged to conveniently move the sample to the observation grid, hand-held scalding can be avoided, the black paint layer is arranged to facilitate auxiliary observation of permeability and impurity rate, the illuminating lamp is arranged to facilitate detection and light supplement, the structure is simple and compact, and use is convenient.

The invention belongs to the technical field of insulated switch equipment, and discloses a compact C-GIS gas insulated switchgear based on an optimized heat dissipation structure and a method. According to the method, in the material and pretreatment stage, a 10 * 60mm copper bar is adopted, and silver plating is completed only by delimiting areas at the two ends of the 10 * 60mm copper bar, so that the procedure of baking black paint is omitted; in the assembly process, according to the updated process file, the installation of the top cooling fin and the back cooling fin is omitted, and the assembly work of the internal cooling frame and the threaded holes for fixing the internal cooling frame is omitted; and after final assembly, whether the overall temperature rise of the compact C-GIS gas-insulated switchgear based on the optimized heat dissipation structure reaches the standard or not is directly verified through a standard temperature rise test or equivalent infrared detection. According to the invention, unnecessary heat dissipation parts (such as a back heat dissipation plate and an internal heat dissipation frame) are canceled, so that the complexity of the cabinet body structure is reduced.

The application discloses a method for manufacturing a large-heat-exchange-capacity low-flow-resistance low-temperature helium cabin, which comprises radiation red copper plates, red copper cooling coil pipes and a helium cabin support, the interior of the radiation red copper plate of the helium cabin is sprayed with special low-temperature black paint to make the internal emissivity greater than 0.92, and the radiation efficiency is greatly improved, the red copper cooling coil pipe adopts three-branch flow parallel cooling of the radiation red copper plate of the helium cabin, the temperature rise of the cooling helium flow is reduced, and the temperature difference of the whole helium cabin is very small, the low-temperature freezing red copper pipe bending process of the special equipment is adopted to ensure that the cooling coil pipe is not concave and wrinkled, the cooling helium flow resistance meets the requirements, the optimized low-temperature tin soldering welding process and the use of red copper pressing sheets and special aluminum foils greatly improve the heat transfer area and ensure the heat transfer efficiency.

The application relates to the paint field and particularly discloses a one-coat high-gloss black paint for an electrostatic spraying process and a preparation method thereof; the one-coat high-gloss black paint for the electrostatic spraying process comprises the following raw materials in parts by weight: 20-30 parts of polyester resin, 30-40 parts of acrylic resin, 15-20 parts of amino resin, 1-3 parts of leveling wetting agent, 18-22 parts of diluent, 1-3 parts of ultraviolet absorber, 1-3 parts of light stabilizer and 2-4 parts of color paste; the amino resin is modified by alkyd resin; the one-coat high-gloss black paint prepared by the application can be suitable for electrostatic spraying, meanwhile, the paint film surface has good gloss and flatness, the pinhole and orange peel phenomena are reduced, and the one-coat high-gloss black paint has better chemical resistance compared with a two-coat process.

The application discloses a two-dimensional rotation light path switching device with stray light suppression. An elevation switching motor drives a switching mirror to switch relative to a horizontal plane between 0 and 135 degrees. An azimuth switching motor drives the switching mirror to switch relative to a main frame installation bottom surface between 0 and 90 degrees. Elevation limit switch assemblies and elevation limit magnet assemblies are arranged at two limit positions of the elevation switching. Azimuth limit switch assemblies and azimuth limit magnet assemblies are arranged at two limit positions of the azimuth switching. When the switching mirror is located at 0 degrees in elevation and 0 degrees in azimuth, the switching mirror is in a light path switching-out state, the back of the switching mirror faces the main light path, and black paint on the back of the switching mirror suppresses stray light of the main light path. When the switching mirror is located at 135 degrees in elevation and 90 degrees in azimuth, the switching mirror is in a light path switching-in state, incident light is reflected by the switching mirror without passing through the main light path. The application does not cause shielding and stray light suppression of off-axis reflection of the main light path, and has high repeated positioning accuracy.

The invention relates to the technical field of pigments, and particularly discloses a near-infrared high-reflection black coating based on perovskite type metal composite oxide and a preparation method. The near-infrared high-reflection black coating comprises a coating component and a functional pigment and filler component, wherein the weight ratio of the coating component to the functional pigment and filler component is (50-90): (10-50); the coating component comprises the following components in parts by weight: 50-90 parts of coating resin, 0.1-0.5 part of a flatting agent, 0.1-2 parts of an anti-settling agent and 30-70 parts of a diluent; the functional pigment and filler component comprises perovskite type metal composite oxide. According to the application, the near-infrared reflectivity of the black perovskite-based coating can be improved, and the cost can be reduced.

The invention discloses a front and rear door trim panel assembly and a machining process thereof, and relates to the technical field of automobile design and machining. The front door trim panel assembly and the rear door trim panel assembly are innovatively designed; and the defect of appearance surface shrinkage caused by the structure on the back of the front door exterior trimming panel is completely avoided. According to the appearance definition that the front door exterior trimming plate end turning edge is high-brightness black paint, meanwhile, the inner plate is integrated with the outer plate end turning edge, the black texture effect is designed on the turning edge to replace black paint, and the problem that paint cannot be effectively attached to the root of the turning edge is solved; the problems of welding bumps or infirm welding and the like of the front door trim and the rear door trim through a traditional ultrasonic puncture welding process are solved, and the full-rubber-block bonding process replaces manual rubber block bonding through an intelligent robot, so that the assembly efficiency is greatly improved, and the problem that the rubber blocks are mistakenly and neglected to be manually loaded is solved.

The technical scheme of the present application discloses a flowerpot paint spraying process with a flow paint spraying color effect, comprising the following steps: spraying a PP white base paint, spraying a water-based white paint, spraying a water-based blue paint, spraying a water-based clear finish, spraying a high gloss paint, and smearing a water-based internal black paint; after the spraying of the water-based white paint is completed, the step of spraying the water-based blue paint is started within 10 seconds; after the spraying of the water-based blue paint is completed, the step of spraying the water-based clear finish is started within 10 seconds; by spraying different paints on the flowerpot blank according to the steps, the flow paint spraying color effect of the flowerpot is realized, and the consistency of the paint spraying effect is high, time and labor are saved.

The utility model relates to the field of automobile parts, in particular to an automobile decorative plate structure with a three-dimensional effect. An automobile decorative plate structure presenting a three-dimensional effect comprises a base and a decorative plate, buckle assembly holes are transversely formed in the upper portion and the lower portion of the base, buckles used for being matched with the buckle assembly holes are arranged on the inner wall of the decorative plate, colored paint or paint is sprayed on a groove in an inner side cover of the decorative plate, and a laser etching line feature area is added through laser etching equipment. Outline black paint is carved on the inner side, and the color register line area on the outer side of the decorative plate is transparently presented in the ground color area. The decorative plate has the advantages that the structure is novel, the design is ingenious and simple, the selection is diversified, the process can be implemented, the maintenance cost is reduced, the color register line area in the ground color area of the arc-shaped decorative plate can be transparently presented from the outer side, and the three-dimensional strength is greatly improved.

The utility model belongs to the technical field of spraying, and particularly relates to a surface black paint spraying device which comprises a base, and a spraying assembly is fixedly connected to the top of the base. The bottom is fixedly connected with a motor; a square plate is rotationally connected to the middle of the base; the square plate is fixedly connected with the output end of the motor; the end part is fixedly connected with a fixed plate; the top of the fixing plate is slidably connected with a sliding plate. The middle part of the fixed plate is in threaded connection with a threaded rod; the end part of the threaded rod is rotationally connected with the sliding plate; a threaded rod is used for moving a sliding plate, so that the workpiece can be fixed more conveniently and rapidly, flexibility is increased when the workpiece is sprayed, the position of the sliding plate is adjusted according to the fixed part, and then the workpiece is fixed; during spraying, the contact between the surface of the workpiece and black paint sprayed by the spraying assembly can be increased through rotation of the square plate, so that frequent turning over of the workpiece is reduced, and the workpiece adjusting time during spraying is shortened.

Disclosed are a lighting grill assembly for a vehicle and a method of manufacturing the same, the lighting grill assembly for a vehicle a grill cover, a black paint portion painted using a black paint on a rear surface of the grill cover, and the black paint portion forming a light transmitting portion through which light passes by removing a part of the painted black paint, an inner lens spaced apart from the rear surface of the grill cover in a rearward direction, and a metal layer is deposited on a surface of the inner lens, and a light source configured to radiate light from a rear of the inner lens.

The light-emitting marker lamp comprises a base, a light source plate is connected to the upper portion of the base, a light guide cover is arranged above the light source plate, a light shading cover is embedded in the upper surface of the light guide cover, and the area, located outside the light shading cover, of the light-emitting face of the light guide cover is a light-emitting area. The circumference of the light guide cover is coated with a high-reflection white paint layer, and the thickness from the light emitting face of the light guide cover to the top face of the base clamping block is about 12.1 mm. Compared with a traditional scheme, the thickness is reduced by 6-12 mm, the occupied longitudinal space is reduced, and it is possible that a light-emitting marker lamp is installed on the steering wheel; the high-reflection white paint layer is coated on the circumference of the light guide cover, the problem of brightness difference between the circumference and the middle area of the light guide cover is solved, the black paint layer is coated on the non-luminous area of the light guide cover, light leakage is prevented under the combined action of the black paint layer and the high-reflection white paint layer, it is guaranteed that the light guide cover has a good visual boundary when the light source plate is lightened, and optical uniformity is improved.

The invention discloses a method for improving orange peel of an aluminum alloy hub through thermal electrostatic spraying, and belongs to the technical field of metal surface treatment. The invention aims to solve the problems of prominent orange peel defects, contradiction between coating hardness and adhesive force and the like during coating of bright black aluminum alloy hubs. The method comprises the following steps: raising the dehydration heating temperature to 150 DEG C and canceling forced cooling, so that a workpiece is subjected to thermal electrostatic spraying of high-leveling orange-peel-resistant black powder at 65-80 DEG C; then black paint and high-solid-content bright paint are sequentially sprayed, and the black paint and the high-solid-content bright paint are solidified together after being fused on the interface; and the surface layer bright paint is subjected to suspended cup type electrostatic spraying so as to realize super-thick uniform coating. Meanwhile, a universal protection plug with a conical head is adopted in the center cap groove, and reliable sealing is achieved through linear contact. According to the invention, the orange peel problem can be obviously improved, the coating has high hardness and excellent adhesive force, the process is simplified, the cost is reduced, and the method is particularly suitable for coating production of high-end bright black aluminum alloy hubs.

The present invention provides an anti-reflective black paint composition having a favorable anti-reflective property, particularly in the infrared region used in LiDAR devices and the like, and having excellent adhesion to a housing of the above-mentioned devices mainly composed of aluminum. Provided is an anti-reflective black paint composition containing: a solvent; an epoxy resin; a cationic thermal reaction initiator; a black pigment; and a silica filler, wherein the silica filler includes an air layer therein, and when made into a cured dry paint coat, a reflectance for light having a wavelength of 1,500 nm is 2.5% or less in total light reflectance measurement at an angle of incidence of 8°.

The invention provides a glass laser blackening transfer film with a vacuum copper-plated layer and a preparation process, and the preparation process comprises the following steps: mounting a transfer film on a rolling shaft, sequentially penetrating through a magnetron sputtering base, a connecting frame, a coating machine and an incremental heating box, and completing vacuum nickel and copper plating in the magnetron sputtering base, intermittent conveying and sectional nickel and copper plating are carried out on the transfer printing film through the lifting assembly; the copper chromite black coating is prepared from copper chromite black powder, a solvent, epoxy resin and auxiliaries, and the auxiliaries comprise one or more of a thickening agent, an anti-settling agent, a defoaming agent and a dispersing agent; compared with the prior art, high-precision marking can be rapidly achieved through software control by utilizing the transfer printing consumable film without being limited by a curved surface / cambered surface glass profile, printed patterns can be flexibly adjusted, customization and flexibility are achieved, the limitation of single color of laser marking is broken through, and high-contrast marking is achieved.

The utility model relates to the technical field of automobile parts, in particular to a multipurpose tail lamp support which comprises a tail lamp support body, the tail lamp support body is of an L-shaped structure, a first welding flange and a second welding flange are arranged at the upper end of the tail lamp support body, a first mounting hole is formed in the first welding flange, and a second mounting hole is formed in the second welding flange. And a second mounting hole is formed in the second welding flange. Under the condition that the multipurpose tail lamp support is universal for cargo compartments and breast board vehicle models, the tail lamp support can be welded to keep the same color as a vehicle body and can also be in threaded connection with black paint pieces, and the problem of poor corrosion resistance of carbon dioxide protection welding seam repair paint is solved. According to the multipurpose tail lamp support, an installation structure is additionally arranged on the tail lamp support, the structural stability of the tail lamp support is guaranteed, welding and screwing realizability is achieved, universality is high, the installation strength of black paint parts used for the tail lamp support of the composite board cargo compartment type is improved, paint spraying treatment at the connecting weld joint of carbon dioxide protection welding is avoided, and the corrosion resistance is improved.

The utility model belongs to the technical field of high-temperature pipeline heat preservation supports, particularly relates to a thermal compensation heat insulation support for supporting a high-temperature fused salt conveying pipeline, solves the technical problems that an existing heat insulation support is poor in heat preservation effect and time-consuming and labor-consuming in installation, and comprises an upper heat preservation assembly, a lower heat preservation assembly and a supporting base. Each of the upper heat preservation assembly and the lower heat preservation assembly comprises a transparent semicircular cylinder, a black heat absorption semicircular cylinder, a specular reflection semicircular cylinder and an internal supporting semicircular cylinder which are coaxially sleeved, the space between the transparent semicircular cylinder and the black heat absorption semicircular cylinder is filled with silicon dioxide aerogel, and the space between the specular reflection semicircular cylinder and the internal supporting semicircular cylinder is filled with aerogel; the reflecting surface of the specular reflection semicircular cylinder faces the internal supporting semicircular cylinder, and the outer circular surface of the black heat absorption semicircular cylinder is coated with black paint; the upper heat preservation assembly is fixedly connected with the lower connecting plate of the lower heat preservation assembly in an aligned mode through the upper connecting plate. The supporting base is supported between the lower heat preservation assembly and the ground.

The invention belongs to the technical field of coating, and relates to a three-spraying and one-baking process for coating high-brightness black on an aluminum alloy wheel, which comprises the following steps: pre-treating and cleaning a blank, spraying a powder coating and curing, polishing and cleaning the powder coating, sequentially spraying black ground paint, high-brightness black paint stock solution, transparent finishing paint and baking and curing for the first time. Through wet-on-wet spraying of the black primer, the high-brightness black paint stock solution and the transparent finish paint, the three coatings are only baked and cured once, a traditional three-spraying and two-baking process is replaced, the visual effect and coverage are enhanced through the black primer, the high-brightness black metal texture is guaranteed through thin spraying of the high-brightness black paint stock solution, and the protection performance is improved through the transparent finish paint; and in combination with optimized leveling and baking parameters, the coating appearance with deep and high-brightness black metal texture, excellent adhesive force, high hardness and durability is obtained while one-time baking is reduced, energy consumption is remarkably reduced, and the production period is shortened. The method is efficient, energy-saving, low in cost, high in product quality and suitable for large-scale production of high-end aluminum alloy wheels.

The invention discloses an integrated light guide type car lamp lightening optical system which comprises a light source module, a fixing support, a light guide module and a decoration frame, the decoration frame is arranged on the fixing support, the light guide module is located between the fixing support and the decoration frame, and the light guide module comprises a set of light guide plates arranged side by side; the adjacent light guide plates are matched and connected through the light guide plate flanges to form an integral light guide module structure; the light source module corresponds to one end of the light guide plate, and the transparent light-emitting area on the decorative frame corresponds to the light guide plate. The number of LED lamp beads is greatly reduced, and the light source cost is reduced; the light emitting end of the light guide plate is sprayed with black paint to shield stray light, the fixing support reflects light to assist light supplement, the brightness uniformity of a light emitting area is effectively improved, and the problems of uneven brightness, stray light interference and the like are solved. And a plurality of light guides are integrally formed through the middle flanging connecting parts and are mounted as a single part, so that the mold cost is reduced, and the assembly efficiency and consistency are improved.

1. Name of this design product: Cup bottom (C-shaped). 2. Purpose of this design product: used as the bottom of a cup. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. Other situations that require explanation: This design requires partial protection. The cup body is covered with black paint. The covered area is the part that is not requested to be protected, and the uncovered area is the part that is requested to be protected. This design does not require color protection.

Methods and apparatuses are described to increase emissivity within a gearbox. Loss-of-lube conditions can cause a gearbox in a vehicle to quickly heat up and fail, which could lead to loss of aircraft and / or life. Surface treatments within a gearbox, such as black paint, black oxide coatings, shot-peening, and others, can increase emissivity within the gearbox. The increased emissivity can increase heat transfer via radiation, leading to longer operational capabilities during loss-of-lube conditions.

This invention belongs to the field of silicon steel processing technology for rotors, specifically relating to a laser shock treatment method for silicon steel used in high-speed motor rotors. The method involves placing a punched, non-oriented silicon steel rotor sheet at a laser shock station; covering the surface of the silicon steel sheet with an absorption layer, which is either a finished insulating coating of silicon steel or a combination of one or more of the following: a finished insulating coating of silicon steel and black tape, black paint, or aluminum foil; turning on a stream of clean water to cover the surface of the silicon steel sheet, or covering the surface with a layer of transparent tempered glass to form a constraint layer; using single-sided, alternating single-sided, or simultaneous double-sided laser shock processing on areas prone to stress concentration, such as the rotor magnetic bridge; cleaning the surface of the silicon steel sheet after the shock processing, ensuring that the dimensional change in the thickness direction of the silicon steel sheet does not exceed 0.5%, and increasing the yield strength by 35-250 MPa. This invention employs localized laser shock processing on the surface of non-oriented silicon steel used in high-speed motor rotors, significantly improving the yield strength without changing the silicon steel composition or manufacturing process.

The application provides a light guide structure, a vehicle lamp structure and a vehicle. The light guide structure comprises a body and an LED. The LED is used for providing light. An incident port is arranged on the body. The light can enter the body from the incident port. The incident port is located at an end or a middle of the body. One or more end faces of the body are closed structures and are coated with a paint surface. The closed structure further has a light-transmitting part. The light-transmitting part continuously or discontinuously extends on the paint surface. The light-transmitting part does not have a paint surface at the extending position. The application coats the one or more end faces of the body with black paint, solves the problem of bright spots in the lamp due to the fact that the light guide end cannot be shaded because of insufficient space, and achieves the effect of transferring part of the energy to the outside. The light-transmitting part avoids the phenomenon that all the light is absorbed by the black paint and high temperature is generated. The light-transmitting part solves the problem that the end face coated with black paint may be carbonized due to overheating.

METHOD AND PROCESS FOR VACUUM PLATING FOR BONDING PLASTICS The invention provides a method and process for vacuum plating for bonding plastics. By uniformly applying a semi-transparent primer to the back of the plastic substrate, the invention improves adhesion and cohesion between the vacuum plating and the substrate, preventing the plating from detaching or puckering during prolonged use. By using an opaque black paint as a chrome- or aluminized-type vacuum plating, the invention effectively prevents light leakage. The interposition of the semi-transparent primer between the plastic substrate and the vacuum plating enhances adhesion and cohesion, as well as resistance to hot and humid environments.Adding a protective varnish to the back increases the reliability of the bond while eliminating traces of the glue layer. Figure to be published with the abbreviation: Figure 1.

The invention discloses a photovoltaic panel sweeper automatic running included angle monitoring system which comprises a steel ruler sleeve, a sliding groove is formed in the steel ruler sleeve, a steel ruler is inserted in the sliding groove in a sliding mode, one end of the steel ruler is connected with a ruler head, a rotating mechanism is arranged at one end of the steel ruler sleeve, an arc-shaped supporting plate is arranged below the steel ruler sleeve, and the arc-shaped supporting plate is connected with the sliding groove. An arc-shaped sliding groove is formed in the arc-shaped supporting plate, a sliding mechanism is arranged between the arc-shaped supporting plate and the steel ruler sleeve, through holes are formed in the two ends of the arc-shaped supporting plate respectively, fixing mechanisms are arranged in the pair of through holes, and the upper wall face of the steel ruler sleeve, the upper wall face of the ruler head and the upper wall face of the steel ruler are all coated with black paint. The external motor and the driving gear drive the driven gear to transmit, so that the driven gear drives the steel ruler sleeve to rotate through the fixing shaft, the steel ruler sleeve can be controlled to slide on the arc-shaped supporting plate, and the rotation angle of the steel ruler and the ruler head can be conveniently controlled.