38results about How to "Prevent potential safety hazards" patented technology

The embodiment of the invention discloses a wireless local area network (WLAN) access authentication method and system based on World Wide Web. The WLAN access authentication method comprises the following steps: AC intercepts a DNS (domain name server) analysis request sent by a WLAN terminal and judges whether the WLAN terminal has passed user authentication or not; if the WLAN terminal does not pass the user authentication, the AC redirects the DNS analysis request to a local DNS which is isolated with a public network; the local DNS constructs a DNS response data packet pointing to an IP address of a portal server and returns to the AC; in response to receiving an HTTP request or an HTTPS request sent by an unauthorized WLAN terminal, a controller is accessed to redirect the HTTP request or the HTTPS request to the portal server; and the portal server sends a WEB authentication page to the WLAN terminal, acquires a user name and password input by the WLAN terminal by virtue of the WEB authentication page, and performs user authentication on the WLAN terminal according to the user name and the password. By adopting the WLAN access authentication method and system disclosed by the embodiment of the invention, the technical problem that the unauthorized WLAN terminal bypasses a Portal authentication process to perform illegal network access in the prior art can be solved.

The invention discloses an identity authentication method allowing an intelligent mobile wireless terminal to access a cloud server, which comprises the following steps that 1, when the intelligent wireless mobile terminal privately accesses the cloud server through a wireless wideband mobile network, an identity authentication request is sent; 2, the cloud server sends an identity authentication response; 3, the intelligent wireless mobile terminal sends an access link authentication request to the cloud server; 4, the cloud server comprises the attributes of the intelligent wireless mobile terminal, such as identity, password and the like, in case of legitimate access, an access link authentication response is fed back; 5, the intelligent wireless mobile terminal sends an access link relevant request; 6, the cloud server responds to one access link relevant response, creating a bilateral link circuit connection; and 7, the reliable access process between the intelligent wireless mobile terminal and the cloud server is completed. Through the invention, the reliability and safety of the cloud server are ensured, thereby preventing the information at the cloud server end from leakage, and blocking dangerous access.

The invention relates to an elevator maintaining and supervising method and system. The elevator maintaining and supervising method comprises the steps that elevator fault information sent by elevator monitoring equipment is received and carries the geographic position of a fault elevator; a maintenance task work order is generated according to the elevator fault information; the current geographic positions of maintenance personnel mobile terminals are obtained, the maintenance personnel mobile terminal closest to the geographic position of the fault elevator is searched according to the geographic position of the fault elevator, and the maintenance task work order is distributed to the maintenance personnel mobile terminal; when elevator maintenance completing information fed back by the maintenance personnel mobile terminal is received, maintenance data are obtained from elevator monitoring equipment, and whether the maintenance personnel finishes the set elevator maintenance procedure or not is determined according to the maintenance data. According to the elevator maintaining and supervising method and system, through overhauling maintenance data, the whole elevator maintenance process can be supervised and managed, the maintenance work quality is effectively improved, and the whole maintenance process is effectively supervised.

The invention discloses a system client authorization authentication method based on a B/S framework. A user needs to apply a unique secret key to authenticate an authorization identity and further to complete the installation of a client, client software obtains a unique physical address MAC address of a host, the unique physical address MAC address is encrypted by MD5 and sent to a server end after being connected with an SALT randomly generated by the system, the user submits a computer terminal authentication application, after verification is passed, the SALT randomly generated by the system is stored in a database, and a Hash value of the MAC address and the SALT is added into an authentication passing list, and the client accesses the authentication. According to the invention, the terminal authorization authentication technology is combined in the B/S framework, various problems of terminal identity authentication by utilizing the mac address through a browser in the B/S framework are effectively solved, the safety problem is also solved, phishing and data interception are avoided, and the probability of illegal users to obtain terminal installation authority is lowered.

The invention discloses a chuck clamp for loading and unloading a well logging exploring tube radiation source. The chuck clamp comprises a base and a revolving shaft arranged on the base, wherein a rotary chuck gear is arranged at the upper end of the revolving shaft; a rotary stepping motor is meshed with the rotary chuck gear through a transmission conical gear to drive the rotary chuck gear and the revolving shaft to rotate; a tongs holder is arranged on the rotary chuck gear; two opposite tongs are arranged on the upper surface of the tongs holder through slide rails; the two tongs are connected with a clamping stepping motor respectively; a transverse rod bracket is arranged on the base; a pin shaft is arranged on the transverse rod bracket; a transverse rod and the pin shaft rotate synchronously; the transverse rod stepping motor is connected with the pin shaft to drive the pin shaft to rotate. By adopting the chuck clamp, clamping and loosening of the well logging exploring tube can be realized, and a series of actions such as opening of a cabin door, loading and unloading of the radiation source, closing of the cabin door and the like can be finished automatically during clamping, so that potential threat to human health due to current manual operation is avoided. The chuck clamp is simple in mechanism and low in maintenance cost, and works stably and reliably.

The invention discloses a lamp post type charging pile. The lamp post type charging pile comprises a charging pile core controller and an automatic security output box. The charging pile core controller is mounted in a hollow portion of a lamp post body, and the automatic security output box is suspended outside the lamp post body in an attached manner by the aid of a metal box. The charging pile core controller comprises a CPU (central processing unit) intelligent control module, a power line inlet port and port protection module, a Bluetooth communication module, an output switchover execution module, an electric power measurement module, a guide and input signal isolation module, a leakage protection module and an output port overtemperature protection module. The automatic security output box comprises a CPU2 single-chip microcomputer, an automatic security locking valve, a charging output socket, a socket temperature sensing and regulating module, status indicator lamps, an emergency charging stop button and a Bluetooth antenna and is arranged in the metal box. The front portion of the metal box is provided with the automatic security locking valve, an operation panel is arranged on the rear portion of the automatic security locking valve, and the charging output socket, the emergency charging stop button and the status indicator lamps are all arranged on the operation panel.

The present invention belongs to the technical field of electric power operation and maintenance devices, and provides a transformer substation intelligent safety fence. The fence comprises a rack, two correspondingly arranged installation racks are fixedly installed in the rack, the rack is internally provided with two scissor-type flexible fences, on ends of the scissor-type flexible fences arerespectively installed on the installation racks, the top portions of one ends of the scissor-type flexible fences are hinged with the installation racks, the bottom portions of one ends of the scissor-type flexible fences are slidingly arranged on the installation racks, a connection rod driven by a drive device is connected between the bottom portions of one ends of the scissor-type flexible fences, and under the action of the drive device, the connection rod performs reciprocating silding in a vertical direction. The fence development and folding and unfolding efficiency are greatly improved, the usage is convenient and flexible, the operation of fence mounting and dismounting are simple and convenient, time and labor are saved, the safety fence arrangement work of a transformer substation with a large field area is convenient and efficient, the operators' labor intensity is greatly reduced, and the practicability is high.

The invention relates to a plug capable of being automatically clamped. At present, electrical appliances are more and more common, various electrical appliances facilitate our modern life, and the stability and the safety of the use of electrical appliances are more and more important. A common plug is clamped via friction between a socket and the plug, however, the common plug is abraded as time passes by or is easily unplugged due to an accident, and accidental loss is brought to work. The plug comprises a plug body, wherein barbs are arranged on the tail ends of plug legs of the plug, each barb is an elastic conductive double-metal sheet, a movable electric insulation wedge is arranged in the middle of each barb, the wedge is connected onto a press button outside the plug, the press button is a resilient plug lock, when the press button is pressed down, the double-metal sheet close to the press button can be pushed open, and the barbs outwards extend to automatically clamp the socket, and when the press button is pressed once more, the press button is restored, the wedge retreats, the barbs on the double-metal sheet inwards shrink, and the plug can be smoothly unplugged. By the adoption of the design scheme, accidental loss caused by accidental dropping of the socket can be prevented.

The invention relates to a method and a system for realizing intelligent detection of construction isolation fence state based on depth learning technology, the method includes: acquiring a real-timeimage as a monitoring image from a video monitoring system, establishing a depth neural network model for classifying the construction isolation fence states, monitoring and processing the construction isolation fence, classifying the monitored images and classifying and judging the states, and starting an alarm for the abnormal states found by the construction isolation fence. The method and thesystem for intelligently detecting the state of the construction isolation fence based on the depth learning technology can accurately distinguish the normal state from the abnormal state of the construction fence. When the depth neural network model is trained, the classification and detection of construction isolation fence only need non-iterative forward operation, which can meet the requirements of real-time detection. The intelligent detection method of the construction isolation fence state provided by the invention has the advantages of fast operation speed and high detection precision,so that the timeliness of the alarm can be ensured and the hidden danger of the construction can be strictly prevented.

The invention relates to the technical field of liquid tank refueling vehicles, in particular to an intelligent integrated fuelling vehicle. The intelligent integrated fuelling vehicle comprises a chassis, a tank body, a component bin, tires, an unloading port, camera monitoring equipment, a water tank, an automatic fire extinguishing system, an alarm control system, an audible and visual alarm, a safety monitoring system, an automatic water sprinkler system, a satellite positioning system, an oil gas recovery system and an anti-overflow and anti-leaking system; and data of the camera monitoring equipment, the safety monitoring system and the satellite positioning system can be sent to a monitoring background in real time. Because the intelligent integrated fuelling vehicle has the function of automatic fire extinguishing, a fire can be automatically extinguished at the beginning stage; the intelligent integrated fuelling vehicle also has the function of wireless network transmission so that the real-time monitoring and states of the fuelling vehicle can be tele-transmitted to the monitoring background; in addition, when leaking accidents happen on the tank body, an outer tank anti-leaking protection layer can prevent an oil product in the tank from continuing leaking; and the safety monitoring system can monitor the temperatures and flames of the vehicle tires so as to prevent in advance to eliminate the safety risks.

The invention relates to a gas device, in particular to a gas emergency cut-off valve capable of automatically cutting off gas supply under the condition of gas leakage or temperature abnormality, belonging to the gas valve manufacturing industry. The gas emergency cut-off valve comprises a valve body, a sealing pad, a valve rod, a permanent magnet, an electromagnetic coil and a return spring. Under a normal condition, the gas emergency cut-off valve can be manually opened, and under other conditions, the electromagnetic coil can be used for generating magnetic force in a mode of powering on the electromagnetic coil so as to drive an armature to downwards move and ensure that the armature is separated from the suction of the permanent magnet, and the valve is closed under the action of the return spring.

The invention provides a safety lock used for an aloft work device and a using method of the safety lock. The safety lock used for the aloft work device comprises a lock body provided with a vertical through hole and a groove. A lock case is arranged outside the vertical through hole, and a lock cylinder is arranged inside the vertical through hole. The groove is formed in the lock cylinder side. A pendulum bob and an elastic element are arranged in an inner cavity of the groove. The groove comprises a V-shaped groove cavity which is formed by a waterproof chamfer, an upper groove plane, a spring fixing face and an oblique groove plane in an enclosure mode, the junction of the spring fixing face and the oblique groove plane is a fillet, and the end, with the swinging fulcrum, of the pendulum bob is located in the fillet. The safety lock provided by the invention is simple in structure; and through the design of the V-shaped groove structure and the waterproof chamfer and the protrusion design of the oblique plane, accumulation of water and dust residues can be effectively prevented, potential safety hazards, caused by erosion of water vapor and dust, of the safety lock are avoided fundamentally, the service life of the safety lock is prolonged greatly, frequent inspection and maintenance are not needed, and effective braking and locking functions can be ensured.

The invention relates to a buckle type plug. The buckle type plug comprises a plug body, the tail end of a pin of the plug includes a clamping head, the clamping head includes two elastic conductive metal strips, a movable electrical insulation wedge exists between the metal strips, the wedge is connected to a control button outside the plug, and the control button includes a rebound type plug lock. When the control button is pressed down, the two metal strips, close to each other, are made far from each other, and the clamping head extends outwardly to clamp a socket automatically; and when the control button is pressed again, the control button is sprung up, the wedge withdraws, the clamping head on the two metal strips contracts inwardly, and the plug can be smoothly drawn out. A common plug is technically improved, increase of the cost is not obvious, the plug can be easily clamped to prevent hidden safety hazards, and loss caused by accidental falloff of the socket in work and production can be avoided.

The invention discloses a teaching experimental apparatus for control of an ultrasonic level. The teaching experimental apparatus comprises a controlled object, an ultrasonic level meter, an upper computer, and a system power branch consisting of a frequency converter and a centrifugal blower; each part of an ultrasonic level control system communicates through a foundation field (FF) bus; and the configuration and system monitoring of the bus are completed by the upper computer. According to the teaching experimental apparatus, the non-contact measurement and FF bus technology of the level control system are combined, and the liquid level measurement in the conventional level experimental apparatus is replaced with the level height measurement of a floating body blown by air, so that the water-getting and waterproofing problems in the liquid level measurement are avoided; meanwhile, the floating body changes obviously in position, so that students can understand the operating principle and process of a single-loop closed-loop control system easily in the teaching experiment and also gain a preliminary recognition and understanding for the use of a modern field bus applied to a process automation system; and furthermore, the teaching experimental apparatus for the control of the ultrasonic level is easy to maintain.

An operation method of an ampoule laser wire drawing filling and sealing machine. The medicine bottle is placed in the rectangular hole on the top surface of the box. After the motor is started, the piston rod of the No. 1 cylinder is shortened to drive the medicine filling mechanism on the left fixed block to descend. The inner wall of the filling nozzle matches the outer wall of the bottle mouth of the medicine bottle. The vacuum machine evacuates the vacuum chamber and the inside of the medicine bottle. The operation module on the top of the medicine filling mechanism controls the extension of the piston rod of the No. The filling mechanism rises to the original position, the piston rod of the No. 2 cylinder shortens and drives the sealing mechanism on the right fixed block to descend, the operation module of the sealing mechanism activates the laser head to emit laser to heat the bottle mouth, and the operation module of the sealing mechanism controls the expansion and contraction of the pliers The rod is extended, and the operating module of the sealing mechanism controls the extension of the piston rod of the No. 2 cylinder to drive the sealing mechanism on the right fixed block to rise to the original position, avoiding potential safety hazards, environmental pollution and Unfavorable factors such as troublesome installation.

The invention discloses a power grid dispatching operation safety accident level determination method and a risk index calculation method. The determination method comprises the steps of collecting calculation data of each stage of power grid dispatching operation; performing safety and stability simulation calculation of each stage of power grid dispatching operation according to the calculationdata; counting the load loss amount, the corresponding loss load equipment and the plant station to which the equipment belongs according to a simulation calculation result; calculating a power grid supply reduction load proportion, a user power failure proportion and a voltage loss station number caused by an electric power safety accident in a preset power grid range; and determining the safetyaccident level according to the power grid load reduction and supply proportion, the user power failure proportion and the voltage loss station number. According to the invention, online evaluation ofthe safety risk of the power grid dispatching operation is realized, a technical foundation is laid for pre-warning and pre-control of the power grid dispatching operation, potential safety hazards possibly caused by the dispatching operation are prevented, and safe and stable operation of the power grid is ensured.