36results about How to "Reduce the chance of danger" patented technology

The invention belongs to the field of lifting equipment, and in particular relates to a pivot fixed multi-face constrained scissor-type lifting mechanism. Three groups of scissor-type trusses are vertical to a base; the bottom ends of the three groups of scissor-type trusses are connected with three epsilon-type connecting pieces which are fixed on the base in a regular triangle manner respectively so as to form rotation pairs, and the top ends of the three groups of scissor-type trusses are connected with three epsilon-type connecting pieces which are fixed on the lower plane of a supportingplatform in the regular triangle manner respectively so as to form rotation pairs; the three groups of scissor-type trusses are in regularly triangular prism arrangement between the supporting platform and the base; an angle between the plane on which each group of scissor-type truss is placed and the plane on which the adjacent scissor-type truss is placed is 60 degrees; among the three groups of scissor-type trusses, central hinging points of crossed connecting rods of scissor layers are connected with the corresponding peaks of the regularly triangular connecting pieces so as to form rotation pairs; and a driving device supports the regularly triangular connecting piece of the first scissor layer on the base so as to drive the whole lifting mechanism to lift. The pivot fixed multi-faceconstrained scissor-type lifting mechanism has a stable structure and high rigidity, and is applicable to environments having requirements such as large loading capacity, working height and the like which cannot be met by general lifting equipment.

The invention belongs to the field of lifting equipment, and in particular relates to a fulcrum fixed multi-surface over-constrained radial scissor type lifting mechanism. W-shaped connecting pieces are respectively fixed on the upper plane of a base and the lower surface of a bearing platform according to vertex positions of regular triangles; three groups of scissor type trusses are vertical to the base; the bottom ends and the top ends of the scissor type trusses are connected with the W-shaped connecting pieces through a bottom rotation pair respectively; an inclined angle of 120 DEG is formed by planes where every two groups of scissor type trusses are positioned; star-shaped connecting pieces are arranged among the three groups of scissor type trusses and among connecting rods with the same height on each layer; and a driving device is arranged at the central position of the base. Compared with a parallel type scissoring machine in the prior art, the invention has the advantages that: the mechanism has a stable structure, the weight of the mechanism can be reduced without the variation of intensity, the rigidity is improved, and high loads can be born, so that the maximum operation height of a lifting platform is increased; and the mechanism has the characteristics of high foldable ratio, compact structure, low dead weight, high bearing capacity, high throughput capacity and high operability.

The invention provides a head-up display device, a driving method, a vehicle and an electronic device. The head-up display device includes a display assembly, a control unit and an execution unit, wherein the display assembly is used to output a display image; the control unit is used to acquire a real-time vehicle speed of the vehicle and generate an image distance control signal according to thereal-time vehicle speed of the vehicle; the execution unit is connected to the display assembly for adjusting the display assembly according to the image distance control signal and controlling the image distance of the image displayed by the display assembly to change according to the change of the real-time vehicle speed; the control unit is further used to generate an angle control signal according to the real-time vehicle speed of the vehicle; and the execution unit is further used to drive the display assembly according to the angle control signal and adjust a top view angle of the imagedisplayed by the display assembly. The technical solution of the head-up display device can reduce the switching time between the normal driving and watching of the image displayed by the head-up display device for the driver, thus reducing the probability of occurrence of danger.

The invention provides an intelligent driving training device, system and method, and belongs to the technical field of intelligent traffic training; the utility model can solve the problem that the existing users have poor training effect or high risk coefficient during driving training. The intelligent traffic training device is characterized by comprising a road condition identification modulefor acquiring and identifying current road condition information of the road on which the user is running; a roadblock setting module for identifying current road condition information identified byidentification module according to the road condition, and a pre-stored road condition adjustment mode to set a virtual roadblock in the current road condition; a driving state identification module for identifying a driving state of a vehicle drived by a user in a current road condition provided with the virtual roadblock; and a prompt module for sending prompt information to the user according to the driving state of the vehicle driven by the user identified by the driving state identification module.

The invention belongs to the technical field of medical equipment, and discloses an intelligent orthopedic surgery system. The intelligent orthopedic surgery system is provided with a preoperative detection module, an intra-operative intelligent control module, an intra-operative intelligent operation module, an intra-operative detection module and a postoperative conditioning solution module. Thepreoperative detection module, the intra-operative intelligent control module, the intra-operative intelligent operation module, the intra-operative detection module, and the postoperative conditioning solution module are sequentially executed, and the intra-operative intelligent control module and the intra-operative intelligent operation module are the same level programs. The required operative procedure is input by the intra-operative intelligent control module, and the surgical operation is performed by the intra-operative intelligent operation module. The surgical progress and the change of a surgical trauma along the operation are monitored by the intra-operative monitoring module to control the surgical trauma during the operation, and after the operation is completed, the postoperative conditioning solution module provides a suitable and accurate postoperative conditioning solution. The intelligent orthopedic surgery system has concise steps, the surgical trauma can be controlled after the operation is completed and the trauma is greatly reduced, and the adapted surgical conditioning solution can be given in time.

The invention discloses a reinforced fracture-resistant road-bridge pavement slab which comprises a first pavement slab and a second pavement slab. A second steel plate is mounted at the top end of each of the first pavement slab and the second pavement slab, a first concave block, a second concave block and a first inserting plate penetrate two sides of a second inserting plate, the bottom ends of two sides of a first steel plate are connected with the first pavement slab and the second pavement slab, a screw penetrates the first steel plate and the second inserting plate, a bearing is fixedon the front of a first fixing block through a rotating rod, a supporting rod is mounted at the left end of the bearing, a convex block is mounted on the left side of the top end of the supporting rod, and the outer wall of the convex block is connected with a third concave block. Through cooperation of the first concave block and the second concave block, the supporting rod clockwise rotates through the bearing to be buckled with the third concave block to mount a tension spring on the surface of the supporting rod to the end of the second inserting plate, so that probability of danger is lowered, and traffic accidents caused by fracture of the pavement slab are reduced effectively.

The invention discloses a teaching system and a teaching method based on an AR system, and belongs to the technical field of augmented reality; the teaching system based on the AR system comprises thefollowing components: a simulation module that is used for automatically selecting a corresponding simulation scene according to the accessed simulation equipment; a motion capture module that is used for capturing trainee motions, and calculating the position of the body of the trainee relative to the simulation equipment; a display module that is used for displaying a corresponding picture according to the simulation scene and displaying the corresponding picture according to the motion of the trainee captured by the motion capture module; and a sound playing module that is used for playingcorresponding sound according to the picture displayed by the display module; according to the invention, the trainee can watch teaching videos from multiple angles through the display module and themotion capture module, and can know motion exercises before practical training, so that the trainees can learn technical essentials without competing for surrounding teachers, and through the motionexercises before practical training, the probability of dangers caused by misoperation in practical training is reduced.

The invention relates to the technical field of a synthesis method of 1-oxacephalosporin-3-epoxymethylene derivatives as a synthetic intermediate of 1-oxacephalosporin for resisting microbes and especially relates to a preparation method of 1-oxacephalosporin-3-epoxymethylene derivatives shown in the formula (I). The preparation method is characterized in that a 1-oxacephalosporin-3-methylene derivative shown in the formula (II) is efficiently and selectively epoxidized into a 1-oxacephalosporin-3-epoxymethylene derivative by hydrogen peroxide in the presence of a catalyst. The 1-oxacephalosporin-3-epoxymethylene derivative and a derivative of a mercaptotetrazole alkali metal salt shown in the formula (III) undergo a reaction and the reaction products are dehydrated under acidic conditions to form a corresponding 1-oxacephalosporin intermediate shown in the formula (IV). The preparation method has the advantages that a halogen addition reaction is avoided; the easily available catalyst is used; a clean and environmentally friendly oxygen source is used; a reaction process is not carried out at a low temperature; equipment corrosion caused by halogens in industrial production is avoided; an investment of expensive special-purpose equipment is reduced; a risk generation rate is greatly reduced; and 1-oxacephalosporin preparation processes are simple and can be operated easily. Therefore, the preparation method has large competitiveness in industrial production.

The invention discloses an explosion-proof analysis cabin with an improved safety coefficient, and aims to solve the technical problems that an existing explosion-proof analysis cabin can convey toxicgas in the environment into the cabin, which threatens the health of analysts in the explosion-proof analysis cabin. According to the technical scheme, the explosion-proof analysis cabin with the improved safety coefficient comprises a cabin body, and a fan used for ventilation is arranged on the side wall of the cabin body; a harmful gas detection module is arranged on the outer side wall of thecabin body, the harmful gas detection device is electrically connected with a control module, and the control module is connected with a sealing module used for sealing the fan and an air purification module used for adjusting the air quality inside the cabin body; the sealing module comprises a sealing frame, a sealing plate and a driving piece which are arranged on the inner side of the fan; and the air purification module comprises an air storage unit, a compression unit and a switch unit, the compression unit and the switch unit are both electrically connected with the control module, andthe cabin body is also provided with an air pressure balance module. The effect of improving the safety coefficient of the explosion-proof analysis cabin in a complex environment is achieved.

The invention discloses a sleeve buckle device with a waste recovery function for garment processing. The device comprises a bottom plate, and two sliding grooves are formed in the top face of the bottom plate. A horizontal first screw rod is movably mounted between the inner walls of the two sides of the front sliding groove; a movable plate is arranged above the bottom plate in a matched mode, vertical supporting rods are fixedly installed at the four corners of the bottom face of the movable plate respectively, screw holes are formed in one sides of the bottom ends of the two supporting rods located in the front, the first screw can penetrate through the screw holes, and the bottom ends of the two supporting rods located in the front can be in contact fit with the inner wall of the bottom end of the sliding groove located in the front. According to the invention, cloth can be flatly laid on the moving plate by an operator, as pressing rod flattens the cloth, presses the two ends ofthe cloth and then conducts button sewing operation, after the button sewing operation is finished, the cloth is driven by the moving plate to return to one side of the bottom plate, in the process, an operator can check sleeve buttons on the cloth, defective products are removed, and the percent of pass is increased.

The invention provides an underwater steel platform dismantling device in a narrow and small space and belongs to the technical field of underwater construction devices. The underwater steel platform dismantling device in the narrow and small space comprises a support platform, a sliding platform and a lifting device. The support platform is used for being erected on the water and is convenient to operate. The sliding platform is slidably arranged on the support platform. The lifting device is fixedly connected to the sliding platform and is used for lifting a steel platform. The lifting device can conduct lifting operation on the water. The dismantling device is good in structure stability, the sliding platform can be adopted for conveying the dismantled steel platform, and the danger occurrence probability is reduced with operation on the platform. The dismantling device is convenient to install and disassemble and high in utilization ratio and can be suitable for lifting work under various scenes. A solar charging device is adopted, electricity can be stored at any time under the circumstance that sunlight exists, and energy conservation and environment protection effects are better.

The invention relates to the technical field of constructional engineering, and particularly relates to a desilting device for constructional engineering. The desilting device comprises a desilting shovel mechanism, the desilting shovel mechanism comprises a control rod and a wall body, a shovel head is fixedly mounted at one end of the control rod, extension plates are integrally mounted on two sides of the control rod, a protective shell is arranged on the outer surface of the shovel head, first bolts are mounted at the top ends of the extension plates in a threaded mode, a fixing plate is fixedly mounted at the bottom end of one side of the wall body, and a groove block is integrally mounted at the top end of the fixing plate. According to the desilting device for constructional engineering, by arranging the protective shell, the extension plates and the first bolts, the protective shell shields the whole shovel head, the first bolts are screwed into holes in the protective shell, the protective shell and the extension plates are fixed, and therefore the protective shell plays a good protective role, the shovel head does not accidentally injure staff when the control rod is placed against a wall, the protective performance is improved, and the risk occurrence probability is reduced.

The invention discloses a fuel gas plug valve, and belongs to the field of plug valves. A plug protective sleeve of a gas sensor is mounted on the upper side of a plug valve body, and an open circuitcontroller in an external chamber is electrically connected with the gas sensor through an external controller. The gas sensor transfers fuel gas leakage information to the external controller, the external controller transfers alarm information to the open circuit controller in the external chamber, and the open circuit controller in the external chamber cuts off an indoor power supply to minimize the occurring probability of risks; a fuel gas leakage auxiliary alarm mechanism is additionally arranged on the plug valve body, so a alarm gas bag can be supported by a fuel gas when fuel gas leakage occurs, and thus the alarm gas bag is subjected to self deformation to extend to the outer side of the plug valve body, the reminder is timely and obvious, the fuel gas leakage alarm can be effectively assisted, users are reminded timely to take safety measures such as overhaul, and the potential safety hazard of the gas leakage caused by improper use or installation problems is greatly reduced.