31results about How to "Evacuate in time" patented technology

The invention relates to the field of optical and projection technology, and more particularly to a DMD module, a DLP machine and a DLP projection device. The DMD module includes a DMD chip, a main housing, a driving plate, a fixing member, a radiator and a connecting member. The radiator includes a radiating block. Through holes are disposed in the fixing member and the driving plate. The DMD chip is fixedly mounted on the main housing, the connecting member is connected to the main housing through the radiator, the fixing member and the driving plate in sequence, and the radiating block is in contact with the back surface of the DMD chip through the through holes in the fixing member and the driving plate. A spring piece is disposed between a stopper portion of the connecting member and the radiator, a spring is disposed between the stopper portion of the connecting member and the fixing member, and the spring passes through the radiator. Therefore, the invention can radiate the heat generated by the DMD chip in time, and ensure the contact accuracy and stability between the DMD chip and the driving plate, thereby improving the quality of a final output image.

The invention discloses an electrical cabinet with a heat dissipation function, which comprises an electrical cabinet shell and a door board. Supporting legs are arranged at both sides of the bottom of the electrical cabinet shell; a plurality of vent holes are formed at one side of the electrical cabinet shell; the door board is arranged at the other side of the electrical cabinet shell; a flowerbed is arranged at the top of the electrical cabinet shell; a temperature sensor is arranged at the top end inside the electrical cabinet shell; an alarm is arranged at one side of the temperature sensor; a heat dissipation fan is arranged at one side of the bottom end inside the electrical cabinet shell; a heat absorption plate is arranged at one side of the top of the heat dissipation fan; a frame is arranged at the middle part of the door board; a driving mechanism is arranged at the top of the frame; the frame is provided with a plurality of blades; rotating shafts are arranged at both sides of the blades; and the driving mechanism is connected with the rotating shafts. By arrangement of the flower bed, integral aesthetics can be improved and heat is effectively insulated; by automatic opening and closing of the blades, heat dissipation ventilation can be improved; and the electrical cabinet disclosed by the invention is reasonable in design and suitable to popularize and use.

The invention discloses an encapsulating material of a new energy automobile battery. The encapsulating material is prepared from the following components in parts by weight: 100 parts of vinyl-terminated silicone oil, 2 to 6 parts of hydrogen-containing silicone oil, 150 to 300 parts of modified aluminum oxide, 0.05 to 0.15 part of a platinum catalyst, 20 to 50 parts of a halogen-free flame retardant, 2 to 5 parts of white carbon black, 0.5 to 1 part of hexamethyl disilazane, 1 to 5 parts of a peroxide vulcanizing agent and 0.5 to 3 parts of a plasticizer, wherein the peroxide vulcanizing agent is prepared from dibenzoyl peroxide and bis(tert-butyl peroxy isopyl)benzene. The encapsulating material prepared through invention formula disclosed by the invention is nontoxic, has no release ofan irritant gas and is environment-friendly and safe, and not only excellent high / low temperature resistance, excellent weather resistance and excellent electric insulation performance are obtained,but also excellent mechanical performance and excellent heat conduction are obtained; during a working process, an effective protection function on a battery is achieved, heat of the battery can be dissipated in time, high-security protection can be provided for the new energy automobile battery, the safety of the battery is increased, the service life of the battery is increased, and occurrence of the accidents of catching a fire and blasting of the new energy automobile battery can be effectively reduced.

The invention discloses a heat radiation type engine cover plate, which comprises a cover plate body, wherein operation handles are arranged at the left side and the right side of the upper middle part of the cover plate body, a heat radiation layer is arranged on the inner wall of the cover plate body, a ventilation hole is arranged in the center of the cover plate body, and a heat radiation fan is connected under the ventilation hole and is in contact connection with the ventilation hole. Through adopting the mode, the heat radiation type engine cover plate has the advantages that the structure is simple, the manufacture is convenient, the heat radiation uniformity is ensured, the heat can be radiated in time, the whole heat radiation process is continuous and stable, and the heat radiation efficiency is high.

The invention belongs to the relevant field of tunnel construction rescue corollary equipment and discloses a passive tunnel construction life-saving system, wherein the system comprises a cabin arranged at the rear side of a tunnel face, a framework sledge arranged at the bottom of the cabin, multiple door structures arranged at the front and rear ends and left and right sides of the cabin, and multiple functional components which are used for air supply, oxygen supply, air purification, environment monitoring, communication, power supply, survival guarantee and the like and are arranged in the cabin. In addition, improved design is mainly performed on arrangement modes of the cabin and the door structures and the specific composition structures of key functional units. Compared with the existing equipment, the passive tunnel construction life-saving system has the advantages that the structural strength of the rescue capsule cabin is further ensured and improved, the escape efficiency and the rescue efficiency are obviously improved, and the passive tunnel construction life-saving system is applicable to various tunnel construction application occasions.

The invention provides a vehicle-installed hydrogen supply system. The vehicle-installed hydrogen supply system comprises a hydrogen supply pipeline and a hydrogen cylinder, wherein the hydrogen supply pipeline comprises an input end used for receiving hydrogen and an output end used for being connected with a fuel cell, the hydrogen cylinder is arranged between the input end and the output end ofthe hydrogen supply pipeline, the front end of the hydrogen cylinder communicates with the hydrogen supply pipeline through a connecting pipeline, a control valve set is arranged on the connecting pipeline to control the conveying amount of hydrogen, the rear end of the hydrogen cylinder is connected with the external environment, a release valve communicating with the hydrogen cylinder is arranged at the front end of the hydrogen cylinder, when the pressure in the hydrogen cylinder is higher than a pressure safety value, the hydrogen in the hydrogen cylinder is discharged through the releasevalve, a fusing valve is arranged at the rear end of the hydrogen cylinder, and when the temperature in the hydrogen cylinder is higher than a temperature safety value, the fusing valve is fused to discharge the hydrogen. The hydrogen cylinder in the vehicle-installed hydrogen supply system adopts two aspects of safety protection, and the safety of the hydrogen cylinder is better, so that the safe and reliable operation of the vehicle-installed hydrogen supply system can be ensured.

The invention relates to an alarm system suitable for detecting hazardous gas. The alarm system comprises front-end monitoring equipment, and the data transmission port of the front-end monitoring equipment is connected with rear-end monitoring equipment. The alarm system is characterized in that the front-end monitoring equipment comprises an equipment box, a data processing board is arranged in the equipment box, the data processing board is provided with a plurality of data communication interfaces, and the data communication interfaces are respectively connected with a control assembly, a front-end transceiving device, a detection device, an alarm device and an electromagnetic valve. Meanwhile, the rear-end monitoring equipment comprises an energy supply device, and the energy supply device is connected with a linkage control driver, a rear-end transceiving device and an exhaust device. Thus, the alarm system can meet field monitoring and realize remote monitoring at the background at the same time. Moreover, the front-end transceiving device and the rear-end transceiving device are formed by modularized structures, so that effective data communication is realized. In the presence of the exhaust device, harmful and hazardous gas can be exhausted in time, thus ensuring field safety.

The invention discloses an inner-film bag with vertically-fitted adhesive tapes. The inner-film bag comprises an inner bag body comprising a top section, a baffle side and a bottom section connected to each other. The inclined-surface structures of the top section and the bottom section are fittingly arranged with an outer bag. Adhesive tapes are connected at edges of the baffle side. The inner-film bag and the outer bag are connected detachably through the adhesive tapes. Multiple air holes are arranged at the joints of the adhesive tapes and the edges of the baffle side. Since the air holes are arranged at the joint of the inner bag body and the adhesive tapes, air flow in the inner bag body can be exhausted in time, and materials can be protected from moisture. Besides, the adhesive tapes on the baffle side can be set at different positions and in different types and can be selected according to practical production needs.

The present invention discloses an agricultural greenhouse harmful gas distributed measurement and control method based on agricultural automation. The method concretely comprises the following stepsof: establishing a system, and establishing monitoring nodes and a ventilation control subsystem; and communicating the monitoring nodes and the ventilation control subsystem, wherein the monitoring nodes employ distributed structures and are installed at different typical positions to perform multi-point distributed measurement of harmful gas concentration through a sensor array and send data andidentification codes of each node to a ventilator control system through a RFID network at the same time, and a main controller of the ventilator control system performs statistics analysis of data of each node. The method provided by the invention can achieve distributed high-precision multi-point detection of harmful gas concentration in the greenhouse, can effectively execute circuit automaticregulation of a ventilator to timely exhaust the harmful gas and has a good utility effect.

The invention relates to a full-automatic transformer lead binding device. The full-automatic transformer lead binding device comprises a support, wherein a base is arranged on the support; a three-claw chuck is fixed on the base; a driven three-claw chuck is also arranged on the base; a binding plate is arranged between the three-claw chuck and the driven three-claw chuck; one end of a lead is clamped by the three-claw chuck; the other end of the lead is clamped by the driven three-claw chuck after penetrating in the binding plate; a binding tape hole is also formed in one side of the binding plate; a binding tape is fed and discharged from a binding tape plate; the binding plate is driven to rotate by using a gear structure, so that the binding tape is wound around the lead; and an ultrasonic weld joint detector is arranged on the base. The full-automatic transformer lead binding device is novel in structure, convenient to operate and simple in working procedure; the original manual binding tape twining is replaced by full-automatic binding; a detecting procedure and a binding procedure are integrated; the labor intensity of workers is reduced; the work efficiency is high; and the quality of the lead is also high.

The invention discloses a waterproof and dustproof electrical cabinet. The electrical cabinet comprises a cabinet body, a thermal insulation plate arranged on the outer side of the cabinet body, a separation plate arranged in the cabinet body, a thermal insulation door plate arranged in front of the cabinet body, a heat radiator arranged on the side face of the cabinet body, a ventilation hole arranged in the side face of the cabinet body, a temperature sensor arranged on the separation plate and a temperature display arranged on the outer side of the door plate. The thermal insulation door plate comprises an inner side plate and an outer side plate. A gap is arranged and an enclosed space is formed between the inner side plate and the outer side plate. A first ventilation opening is arranged in the inner side plate and a second ventilation opening is arranged in the outer side plate. A filtering device is arranged on at the first ventilation opening. The temperature sensor is electrically connected with the heat radiator and the temperature display. The ventilation hole is arranged on one side wall of the cabinet body and the heat radiator is arranged on the other side wall of the cabinet body.

The invention discloses a spherical drum type stir-frying machine which comprises a spherical drum, a heating device, an insulating housing, supporting roller devices, a bearing pedestal, a transmission speed reducing device and a bracket, wherein the spherical drum is composed of a spherical drum main body, a cone body and a straight pipe, and the spherical drum main body, the cone body and the straight pipe are communicated inside; the spherical drum main body is a sphere-like or ellipse-like assembly which is spliced by a plurality of polygonal housings in a welding manner, and the straight pipe and the cone body are respectively arranged at the left end and the right end of the spherical drum main body; a frying plate and a discharge groove are formed in the spherical drum main body; an air inlet device is arranged at the tail end of the straight pipe; the air outlet of the air inlet device is communicated with the inner cavity of the special drum. Tea leaves heated in the sphere-like or ellipse-like spherical drum main body overturn along with the spherical drum and are driven by the frying plate aloft to be continuously thrown, and the thrown tea leaves are overturned under the action of the air inlet device to immediately diffuse high temperature and moisture, so that the fried finished product tea leaves are jade green in color and luster.

The invention relates to drilling processing equipment for a computer control mainboard. The equipment comprises an air suction platform, a U-shaped frame, a driving unit, a connecting plate, a drilling unit and a stripping unit, the U-shaped frame is installed on the air suction platform, the driving unit is installed in the middle of the upper end of the U-shaped frame, the connecting plate is installed at the lower end of the driving unit, and the drilling unit is installed on the connecting plate; and the stripping unit is mounted at the right end of the connecting plate. The problems thatthe edges of hole sites punched through a drill bit are rough, the hole sites are used for assembling electronic components, the diameters of different hole sites are usually different, a common drill bit is difficult to completely match, the hole diameters punched in the control mainboard are large, therefore, secondary machining needs to be conducted on the hole sites before the electronic components are assembled, due to the fact that the surface of the control mainboard in production is smooth, the situation of displacement possibly occurs in the drilling process, and material scraps aredifficult to completely discharge from hole sites are solved.

The invention discloses a novel oven. The novel oven comprises an oven shell provided with a steam outlet pipe, a water outlet pipe, a steam inlet pipe, a hot air blower and an air outlet pipe, dryingplatforms, electric heating plates and a turning mechanism, wherein the drying platforms, the electric heating plates and the turning mechanism are arranged in a drying room. The turning mechanism includes turning shafts arranged above the top surfaces of the drying platforms in parallel and positive and negative motors located on the outer side surface of the oven shell and fixedly connected with the turning shafts for driving the turning shafts to rotate forward and backward. A plurality of turning blades are distributed circumferentially and equidistantly in a staggered mode on the turningshafts. An oven base is arranged at the bottom of the oven shell, and an electric control box is arranged on the oven base. A microprocessor is arranged in the electric control box. A solenoid valveis arranged on a pipeline communicating the hot air blower with the drying room. A temperature sensor is arranged in the drying room. A flow valve is arranged on the steam inlet pipe.

The invention belongs to the technical field of chairs, and particularly relates to a pet rocking chair. By the aid of the pet rocking chair, the technical problems of unreasonable designs and the like in the prior art can be solved. The pet rocking chair comprises two support plate assemblies and a middle sitting and leaning component. The support plate assemblies are symmetrically arranged in the left-right directions, the middle sitting and leaning component is arranged between the two support plate assemblies in a connected manner, each support plate assembly comprises two wood clamp plates, the two wood clamp plates of each support plate assembly are symmetrically arranged, an intermediate layer is arranged between the two wood clamp plates of each support plate assembly, a pluralityof layers of first corrugated paper are sequentially stacked and connected with one another to form each intermediate layer, a plurality of layers of second bent corrugated paper are sequentially stacked and connected with one another to form the middle sitting and leaning component, a plurality of polygonal holes are uniformly formed in positions between every two adjacent layers of second bent corrugated paper at intervals, a seat cushion and a backrest of the middle sitting and leaning component are penetratingly provided with a plurality of double-thread screws, two ends of each double-thread screw penetrate screw via holes in the support plate assemblies, and nuts sleeve the two ends of each double-thread screw and are in contact with the outer surfaces of the support plate assemblies. The pet rocking chair has the advantage that the practicality can be improved.

An illumination LED lamp comprises a lampshade, an LED light source substrate, a drive electronic element and a heat dissipation cover. An LED light source is arranged on the LED light source substrate. The lampshade covers the LED light source. The heat dissipation cover is fixed to the lampshade and is made of heat conduction materials. The drive electronic element is electrically connected with the LED light source and is arranged on the heat dissipation cover. The illumination LED lamp is better in heat dissipation effect and longer in service life.

The invention provides an oil discharge device and a steamer. A feed port and a discharge port are formed above both sides of the steamer box, a feed roller is arranged above the feed port, and a feed roller is arranged above the discharge port. The discharge roller and the second circulating fan are arranged on both sides of the steamer casing, wherein the oil discharge device includes: arranged obliquely above the feed roller and / or the discharge roller and reserved with the top of the steamer casing An anti-drip plate with a preset gap, an oil discharge hole is formed at the lower end of the anti-drip plate; and an oil discharge pipe arranged under the oil discharge hole to receive the oil fume and discharge the oil fume outside the steamer box; wherein, the first The air outlet end of the secondary circulation fan runs through the anti-drip plate, forming a hot air circulation space above the side of the anti-drip plate, so that the gas flowing from the air outlet end to the hot air circulation space can flow into the steamer box from the preset gap. The invention solves the problem that the quality of the fabric is affected because the steamer in the prior art cannot disperse oily smoke in time during operation.

The invention discloses a suspension combustion type boiler which comprises a boiler body. A combustion chamber is arranged in the boiler body. An evaporation heating surface is arranged over the combustion chamber. A smoke discharging part is arranged on one side of the upper end of the combustion chamber. An ignition device used for ignition is further arranged in the combustion chamber. A feedpipe is included and penetrates to the combustion chamber from the outer portion of the boiler body. A conveying screw is coaxially arranged in the feed pipe. A feeding motor is arranged at the tail end of the feed pipe to be in transmission connection with the conveying screw. A feeding hopper is arranged on the upper side of the feed pipe. An air supply opening is arranged in the combustion chamber and is connected with an air supply fan on the outer portion of the boiler body through an air supply pipe. An ash collection trough gathered downwards is arranged in the direction of the lower end of the combustion chamber. The lower end of the ash collection trough is connected with an ash discharging pipe. An ash discharging screw is coaxially arranged in the ash discharging pipe. An ash discharging motor is arranged at the tail end of the ash discharging pipe to be in transmission connection with the ash discharging screw. An ash discharging opening communicating with the interior of the pipe is arranged on the lower side in the direction of the tail end of the ash discharging pipe. The suspension combustion type boiler is especially suitable for rice hull and rice bran powder typefuel.

The invention discloses a multifunctional electric automatic power distribution cabinet. The multifunctional electric automatic power distribution cabinet comprises a shell, a top cover and a shutterair inlet. The shutter air inlet is formed in the outer side face of the shell and fixedly connected with the shell, a separation plate is arranged in the shell and movably connected in the shell, andthe top cover is arranged at the top of the shell and welded to the shell. A solar cell panel is arranged above the top cover and welded to the top cover, an embedded circuit baffle is arranged in the top cover and welded to the top cover, and an insulation door is arranged in the shell and movably connected with a wind power generation shell through a hinge. According to the multifunctional electric automatic power distribution cabinet, a heat radiating opening is formed in the top of the shell, the interval between clearances in the heat radiating opening is not larger than 5 mm, hot air small in density can be exhausted out in time, insects can be effectively stopped outside the heat radiating opening through the clearances not exceeding 5 mm, and electric leakage accidents caused dueto the fact that the insects enter the power distribution cabinet to touch an internal circuit can be reduced.

The invention discloses a multifunctional floodlighting lamp, which comprises a shell body and a motor seat arranged below the shell body. Reflective glass is arranged on the surface of the shell body; a light source is arranged inside the reflective glass; a plurality of heat-radiating sheets are uniformly distributed at the rear side of the shell body; a heating device and a fan are connected onto the heat-radiating sheets; and both the heating device and the fan are connected with an intelligent controller. Through the manner, the multifunctional floodlighting lamp has the advantages that the structure is simple, the heat of the floodlighting lamp can be radiated in time, the service life of the multifunctional floodlighting lamp is prolonged, and meanwhile, the heat radiated by the floodlighting lamp can be used for driving the fan to work so as to reduce the temperature of a surrounding environment, or driving the heating device to work so as to ensure the rise of the temperature of the surrounding environment.

The invention relates to a scraper transmission mechanism of a cold-rolled emulsion magnetic filter, belonging to the technical field of cold-rolling equipment in the metallurgical industry. The technical solution is: including track (1), car body (2), upper scraper arm (3), lower scraper arm (4), upper top wire (5), lower top wire (6), cylinder (7) and scraper (12), the car body (2) is set on the track (1), the upper scraper arm (3) and the lower scraper arm (4) are respectively fixed on the car body (2) through pin shafts, the upper scraper arm (3) and One end of the lower scraper arm (4) is connected by a cylinder (7), and the other ends of the upper scraper arm (3) and the lower scraper arm (4) are respectively equipped with a scraper (12), the upper scraper arm (3) and the lower scraper arm ( 4) There are upper top wire (5) and lower top wire (6) respectively. The invention has the beneficial effects of avoiding the damage to the motor, the chain connection block and the pin shaft structure when the four-bar linkage mechanism in the prior art hits the block, and effectively improving the operating life of the scraper transmission mechanism.

The invention discloses a carbon material reinforced outdoor floor polypropylene special material and a preparation method thereof. The carbon material reinforced outdoor floor polypropylene special material comprises the following components: polypropylene, a polyolefin elastomer, a filler, an anti-aging agent, a carbon material and a processing aid, wherein the carbon material comprises at least one of carbon nanotubes, carbon nanofibers, carbon nanospheres and graphene. Carbon nano-tubes, graphene and other nano-carbon materials are introduced into an original PP weather-resistant material, and the prepared outdoor floor has better weather resistance and wide application prospects.

The invention relates to the technical field of talkback alarm, and discloses a multifunctional talkback system compatible with a civil air defense alarm system, which comprises a property control center, a corridor monitoring unit and a plurality of alarm devices, the property control center is in communication connection with the corridor monitoring unit and the alarm device. The corridor monitoring unit is arranged at a corridor and comprises a temperature and humidity sensor, a smoke sensor, a water sensor, an acceleration sensor and a monitoring camera; the alarm device comprises an indoor alarm component and an outdoor alarm component, the indoor alarm component is arranged on the indoor unit, and the outdoor alarm component is arranged at the corridor. According to the invention, accidents such as earthquakes, flood disasters or fire disasters can be monitored and alarmed, people are timely notified to refuge, and the personal safety and property safety of people are protected.

The invention discloses a silencing and heat preservation brick for building decoration. The silencing and heat preservation brick comprises a shell, an inner panel and an outer panel, wherein the inner panel is mounted at the left end of the shell, the outer panel is fixedly connected with the right end of the shell, a porous partition plate is fixedly connected to the middle of the inner wall ofthe shell, silencing sponges are adhered to the periphery of the porous partition plate, and a reinforcing protective layer is mounted between the right wall of the inner panel and the silencing sponges; the reinforcing protective layer comprises longitudinal reinforcing steel bars, transverse reinforcing steel bars and mortar, wherein the interior of the mortar is connected with the longitudinalreinforcing steel bars and the transverse reinforcing steel bars in a penetrating mode; and the portion between the silencing sponges and the left wall of the outer panel is filled with a rock wool layer, the middle of the right side of the shell is fixedly connected with a left protrusion, the middle of the right side of the shell is connected with a right groove in a penetrating mode, the middle of the bottom surface of the shell is fixedly connected with a lower protrusion, and the middle of the upper surface of the shell is fixedly connected with an upper groove. The silencing and heat preservation brick for building decoration has the advantages of high heat preservation performance, good silencing effects and high practicability.

The invention provides an oil discharge device and a rapid steamer. A charge port and a discharge port are formed above the two sides of a box body of the rapid steamer; a charge roller is arranged above the charge port; a discharge roller is arranged above the discharge port; and second circulating fans are arranged at two sides of the box body of the rapid steamer. The oil discharge device comprises a drip-proof plate which is obliquely arranged above the charge roller and / or the discharge roller, a preset gap is reserved between the drip-proof plate and the top of the box body of the rapidsteamer, and an oil discharge hole is formed in the lower end of the drip-proof plate. The oil discharge device further comprises an oil discharge pipe which is arranged below the oil discharge hole and used for receiving oil smoke so as to discharge the oil smoke out of the box body of the rapid steamer, wherein air outlet ends of the second circulating fans penetrate through the drip-proof plate, so that a hot air circulation space is formed above the side of the drip-proof plate, and air circulating from the air outlet ends to the hot air circulation space circulates into the box body of the rapid steamer from the preset gap. According to the invention, the problem of influence on the quality of fabric due to the fact that oil smoke cannot be exhausted in time when a rapid steamer works, in the prior art, is solved.

The invention discloses a diesel engine air-intake pipe which comprises an air-intake pipe body, an air-intake main pipe and an air-intake manifold, wherein an air-intake turbine is fixedly connectedwith one inner end of the air-intake pipe body; the air-intake manifold is fixedly connected with the bottom end of the air-intake pipe body; noise-reducing rubber closely fits the interior of the air-intake pipe body; a dismounting ring is connected with the periphery of the air-intake main pipe in an embedding manner; dismounting threads are fixedly connected with two ends of the top of a dieselfiler; and a sealing sleeve is fixedly connected with the top end of a filter screen. Through the sealing sleeve, the escape of air can be well prevented, and then the sealability of the diesel filter can be guaranteed; through the dismounting ring, the air-intake main pipe and the air-intake pipe body can be conveniently and rapidly separated, and then the convenience and the rapidness of the diesel engine air-intake pipe can be improved; through the noise-reducing rubber, the noise pollution generated during the work of a diesel engine can be effectively reduced; through a filter element, dust mixed with air can be adsorbed off, and then the purity of air injected into the diesel engine can be guaranteed; and the diesel engine air-intake pipe is applicable to the diesel engine and has broad development prospects in the future.

The invention relates to a measuring device. The measuring device comprises an image acquisition mechanism, a load adjusting mechanism, a lighting mechanism and a supporting bottom plate, and is characterized in that the load adjusting mechanism is located between the image acquisition mechanism and the lighting mechanism, the image collecting mechanism comprises a supporting seat, a lens, a camera and a camera radiator; according to the invention, the camera radiator is adopted, so that the camera can work continuously for a long time, the service life of the camera is prolonged, and the measuring accuracy is ensured; an adjusting mechanism which can finely adjust the position of a shaft workpiece to be measured is adopted, so that alignment and high-quality measuring accuracy can be guaranteed; according to the invention, the measuring device has high measuring accuracy, long service life and low cost.