103results about How to "Avoid operational accidents" patented technology

The invention discloses a dynamic axle temperature prediction method for a high-speed train based on a multiple regression model. The dynamic axle temperature prediction method is specifically implemented according to the following steps: step 1, classifying original data of the train; step 2, distinguishing the classified data in step 1; step 3, establishing an axle temperature analysis flow model for the distinguished data obtained in step 2; and step 4, checking the flow model obtained in step 3. According to the dynamic axle temperature prediction method disclosed by the invention, the problem that an axle temperature can be predicted based on an axle temperature change mechanism in the prior art is solved.

The invention discloses an SOGI-based single-phase transformer short-circuit parameter on-line real-time identification method. The identification method comprises steps of establishing a T-type equivalent circuit of a single-phase transformer; listing the short-circuit impedance parameter equation and the T-type equivalent circuit equation of the transformer; respectively obtaining the d axis equation and the q axis equation of the T-type equivalent circuit in a dq coordinate system; and using a SOGI-FLL model to extract fundamental wave components and fundamental wave orthogonal components of all input signals, obtaining the d axis component and the q axis component of all input signals in the dq coordinate system, and calculating the short-circuit resistance values Rk and Xk of the single-phase transformer, thereby achieving on-line monitoring of operation states of single-phase transformer windings. When windings of the transformer deforms and break down, the short-circuit impedance of the transformer will change. By measuring voltage and current of the primary side and the secondary side of the transformer, short-circuit parameters of the transformer windings can be identified. Thus, on-line monitoring of the operation states of the transformer windings is achieved; potential risks of the transformer can be found as soon as possible; fault points can be timely removed; operation accidents can be avoided; and service lifetime of the transformer is extended.

The invention discloses an emergency railway vehicle driving control system and a method thereof. The control method comprises the following steps that: when a locomotive control system receives an emergency driving mode activation signal, whether a locomotive is required to be in an emergency driving control flow is determined according to the signal; a potentiometer and an auxiliary contact are used for giving out position information of a dragging/braking handle; after the emergency driving mode is activated, the emergency driving control flow is started up; and the locomotive control system receives a signal of the auxiliary contact and controls the ascending, the maintaining and the descending of dragging force or brake force, so as to enable the locomotive to be started up, accelerated, decelerated and stopped. According to the system and the method, when the potentiometer is invalid or a modulus collecting channel of the locomotive control system has faults, during the process in which a driver moves the dragging/braking handle, the locomotive control system can receive the signal of the auxiliary contact, and whether the locomotive is required to be subjected to ascending, maintaining and descending under the dragging/braking force is determined, so that the emergency driving of the locomotive can be realized, and the running safety of railway vehicles greatly is improved.

The invention relates to a wet method ball mill belly expansion fault prediction device and a method. The invention is characterized in that the device comprises a vibration signal detecting device and a monitoring computer, wherein the vibration signal detecting device is arranged on the surface of a tube wall of a ball mill and has the wireless communication function, the monitoring computer is arranged near the ball mill and has the wireless communication function, an acceleration sensor, an analog-to-digital conversion unit, a central processing unit, a data storage unit and a wireless data sending unit are prearranged in the vibration signal detecting device, a wireless data receiving unit, a ball mill belly expansion fault model training unit and a ball mill belly expansion fault prediction unit are prearranged in the monitoring computer, the central processing unit controls the analog-to-digital conversion unit to carry out analog-to-digital conversion on vibration acceleration signals collected by the acceleration sensor and to store the vibration acceleration signals into the data storage unit, the central processing unit calculates the data stored in the data storage unit, and sends the data to the wireless data receiving unit through the wireless data sending unit, and the wireless data receiving unit transmits the received data to the belly expansion fault model training unit and the fault prediction unit.

The invention relates to an online monitoring system and monitoring method for turn-to-turn short circuit of a power distribution transformer. The online monitoring system and monitoring method aim at monitoring the turn-to-turn short circuit situation of the power distribution transformer in real time and giving out fault diagnosis timely. By means of the online monitoring system and monitoring method, an electrical signal collecting device is utilized to collect electrical parameters of the power distribution transformer, a signal preprocessing unit can convert the collected electrical parameters into digital signals, a digital signal collecting unit collects the digital signals and transmits the digital signals to a data processing and diagnosing unit through a wireless terminal, and the data processing and diagnosing unit can process and analyze the received digital signals and can carry out fault diagnosis according to processed and analyzed results. The online monitoring system and monitoring method can monitor turn-to-turn short circuit of the power distribution transformer in an online mode in real time. Thus, fault can be found timely in early stage, operation accidents can be avoided, the actual service life of the power distribution transformer is prolonged, and power supply reliability is improved.

The invention discloses a method for measuring switch latency of an intelligent substation by utilizing a network message analyzer to analyze message passing a switch. Online measuring of switch latency is achieved, and alarming can be sent when latency border crossing occurs. In addition, the original topological structure of the switch communication network is unaffected.

The invention discloses a stirrup box capable of compressing and orderly releasing spiral continuous stirrups. The stirrup box comprises a luffing device used for adjusting the size of the cross section of the stirrup box, a running device enabling the stirrup box to move in the longitudinal stirrup direction and a stirrup releasing device used for compressing, storing and orderly releasing the spiral continuous stirrups. The luffing device comprises a chain transmission mechanism and a screw mechanism. Chain wheels of the chain transmission mechanism are coaxially connected with a screw of the screw mechanism. The running device comprises a gear transmission mechanism, and a gear pair is arranged on the lower portion of the stirrup box to enable the stirrup box to move wholly. The stirrup releasing device comprises a chain transmission device, the chain wheels are arranged vertically and horizontally, the transmission direction of chains is identical, the stirrups are stored in space formed by the chains, and the chains support and transmit the stirrups. After the luffing device is adjusted according to the transverse sizes of the stirrups, the stirrup releasing device and the running device coordinate actions to complete releasing and arranging of the stirrups. The stirrup box can save molding time of a framework of a steel reinforcement, and reduce the entire size of equipment of the framework of the steel reinforcement.

The invention discloses a soft interlocking mechanism used in a switchgear entering and leaving device, and aims at solving the problem in the existing movable entering and leaving operation. The device comprises a protective clutch assembly (20), a screw (7), and a nut assembly (21). One end of the screw (7) is connected with the protective clutch assembly (20) and the other end of the screw (7) is movably connected with the nut assembly (21). When in over-torque operation, the protective clutch assembly is started to cause an operating head to skid, which leads to an invalid operation and realizes protection of the mechanism and the device; when a breaker is switched on or an earthing switch is switched on, the nut only rotates along with the screw and the nut assembly does not move, which causes the entering and leaving operation to be invalid and realizes the interlocking requirement. The mechanism has the advantages of simple and compact structure, small volume, high reliability and strong anti-misoperation ability. The misoperation of an operator causes no damage to and no impact on the whole switchgear, and can effectively eliminate operating accidents.

The invention is suitable for the field of accumulated water monitoring for railways, and provides an accumulated water monitoring and warning device for a railway based on machine vision and a method. The method comprises the steps that after a railway video is acquired through a camera, image extraction is conducted according to frames, image binarization processing is conducted, color spaces ofrailway images are converted into HSV converted color space models capable of being conveniently processed, and geometrical characteristics of the railway are obtained; a Canny edge detector is usedfor edge detection, clearer edges are extracted for the railway images, and an erosion and dilation technology is adopted for achieving image denoising and edge enhancement, so that geometrical characteristics of the images are enhanced; finally, Hough transformation is conducted, contrasted with preset standard railway images, whether or not accumulated water covers the railway is judged, and therefore accumulated water data is obtained. When it rains, the camera works to monitor water accumulation conditions of points in real time, the accumulated water data and Beidou positioning information are transmitted to a monitoring center though a data transmission device, and corresponding alarm reminding is conducted, so that water accumulation railway sections are treated in time.

The invention provides a segmental non-contact power supply transmitting device for a rail car and a control method for the segmental non-contact power supply transmitting device. The power supply transmitting device comprises an electric energy conversion device and a plurality of transmitting coils, wherein the electric energy conversion device is connected with a power supply bus; the plurality of transmitting coils are connected with the electric energy conversion device; each segmental power supply transmitting coil comprises a plurality of groups of transmitting coils which are connected in series; and the electric energy conversion device is connected with the segmental transmitting coils through power distribution switches and corresponding single-pole double-throw switches. The control method of the device comprises the following steps: when a receiving coil is entering the transmitting coils, energizing the transmitting coils in advance for making a power supply preparation; when the receiving coil completely enters the range of the transmitting coils, only energizing the transmitting coils to supply electricity to the receiving coil; and when the receiving coil stretches across two adjacent transmitting coils, simultaneously energizing the two coils to supply electricity to the receiving coil and achieving smooth switching between a single-coil power supply mode and a dual-coil power supply mode. Continuous electric energy transmission with stable transmission power can be carried out on a mobile rail car-mounted receiving device; the electric energy transmission loss is small; and the efficiency is high.

The invention discloses an outdoor anti-misoperation device for a switch blade on a pole. The device comprises an electrical pole, the switch blade, a switch blade on-off rod, a turnover mechanism, an operation control mechanism and a protective cover spliced by a plurality of solar cell panels, wherein the solar cell panels can turnover upwards or downwards around a hinged piece through the turnover mechanism; a solar control mechanism, a solar control mechanism cell box and a solar control box are connected onto the solar cell panels; a plurality of cell installation holes and storage batteries in threaded connection with the cell installation holes are arranged in/on the bottom part of the cell box; the turnover mechanism comprises a shell, a main controller, a motor, a gear plate and a transmission chain; two ends of the transmission chain are respectively connected with the solar cell panels and the gear plate; the operation control mechanism comprises a handheld terminal and a backstage remote controller. The outdoor anti-misoperation device for the switch blade on the pole provided by the invention is simple to operate, and energy-saving and environment-friendly, can ensure an operator to carry out operation on the correct switch blade, effectively avoids the occurrence of operation accidents, and ensures the safety of lives and properties.

The invention discloses a novel bridge-frame crane. The novel bridge-frame crane comprises a driver cab, a hoisting trolley, a bridge-frame operating mechanism and a bridge-frame metal structure, wherein a plurality of groups of windows are arranged on a front panel, a lower panel, a left panel, a right panel and a rear panel of a cabin body of the driver cab; the left panel and the right panel are respectively provided with an adjustable type electric rear-view observation mirror; an adjustable type seat is arranged in the cabin body of the driver cab and comprises a base and a movable seat; the base comprises a fixed seat, a front-rear movement part and a left-right movement part; the two sides of the lower surface of the seat body are respectively provided with a left operation platform and a right operation platform; and the four corners of the lower surface of the lower panel are fixedly provided with same driver-cab buffering mechanisms. The novel bridge-frame crane disclosed by the invention has the advantages that the defects of the driver cab of the existing bridge-frame crane can be overcome, the integrated type design of the driver seat and the operation platforms is realized, the observation viewing angle is good and simultaneously the vibration-reducing function is achieved.

The invention discloses a high-speed train temperature anomaly detection method based on space-time fusion decision. The time-dimension axle temperature anomaly detection model and the space-dimensionaxle temperature anomaly detection model are fused, and the temperature anomaly condition of the high-speed train part is detected based on space-time fusion in combination with the DS evidence theory. According to the method, the temperature anomaly detection models of two dimensions of time and space are combined by utilizing the DS evidence theory, so that the false alarm rate can be reduced,a relatively large early warning amount can be ensured, and advantages and disadvantages of time and space dimension models are improved.

The invention discloses a high-speed train bearing temperature anomaly detection method based on a space-time fusion decision. A time dimension bearing temperature anomaly detection model and a space dimension bearing temperature anomaly detection model are fused, and a D-S evidence theory is combined to detect a bearing temperature anomaly condition based on time-space fusion. According to the method, the bearing temperature anomaly detection models in the two dimensions of time and space are combined by using the D-S evidence theory, so that the false alarm rate can be reduced, a relatively large early warning amount can be ensured, and the effects of enhancing the advantages and avoiding the disadvantages of the time and space dimension models are realized.

The invention discloses a hybrid CDN unified source station automatic refreshing method. The method comprises the following steps: setting a configuration rule corresponding to specific operation information of a file system in an operation system; Carrying out real-time monitoring on the source station file by calling a system Inotify interface, and obtaining specific operation information and acomplete path of the changed file; After the specific operation information is identified, according to the set configuration rule and the complete path of the variable file, matching a correspondingrefresh interface program to generate a task, and issuing the task to a task queue; Reading the task queue, and executing the task instruction; The invention also discloses a hybrid CDN unified sourcestation automatic refreshing system. Monitoring of files on a source station server is achieved through program logic, study and judgment are conducted according to the deployment path of the changedfiles, the corresponding acceleration domain names, rules and DNSresolve, corresponding actions are obtained through accurate matching, then automatic execution is conducted through a task module, manual intervention is not needed, and rapidness and accuracy are achieved.

The invention relates to a light foldable high-voltage switch trolley guide rail for a transformer station, and a use method. According to the technical scheme of the light foldable high-voltage switch trolley guide rail, the light foldable high-voltage switch trolley guide rail comprises positioning blocks, guide rail bodies, a folding shaft, guide rail bases, buffer grooves and a support plate; and the two parallel guide rail bases are connected through the support plate, the guide rail bases are provided with the guide rail bodies, one end of each guide rail base is provided with the corresponding positioning block, the other ends of the guide rail bases are provided with the buffer grooves, and the support plate is provided with the folding shaft. The light foldable high-voltage switch trolley guide rail is advantageous in that the light foldable high-voltage switch trolley guide rail for the transformer station can help operating personnel conveniently and rapidly operate a high-voltage switch trolley, shortens operating time and improves working efficiency.

The invention discloses a head rolling machine, and belongs to the technical field of head rolling machine equipment. The head rolling machine comprises a motor, rollers, gears and a base. The head rolling machine is characterized in that the base is provided with a safety seat, the safety seat is provided with a left fixed seat and a right fixed seat, the motor is arranged on the base, a connecting shaft is arranged at the front end of the motor, an eccentric crank and rocker mechanism is arranged at the front end of the connecting shaft, the eccentric crank and rocker mechanism is connectedwith a roller shaft I, the tail end of the roller shaft I is provided with a gear I, the gear I is connected with a gear II, a roller shaft II is arranged at the front end of the gear II, the roller shaft I and the roller shaft II are provided with the roller I and the roller II respectively, the roller shaft I and the roller shaft II are arranged between the left fixed seat and the right fixed seat, and a machine shell I, a machine shell II and a machine shell III are arranged between the left fixed seat and the right fixed seat. According to the head rolling machine, the purposes of being reasonable in structural design, simple and convenient to operate, high in mechanical strength and safe and reliable are achieved.

The invention discloses a star (Y) connection high voltage electric motor insulating detection apparatus, and relates to the technical field of high voltage electric motor insulating detection. The apparatus is composed of a detection main circuit, an AC control circuit and a DC control circuit, wherein the main circuit constitutes a closed detection loop together with high voltage isolators GLO<1>-GLO<n>, a high voltage isolator GLQ, high voltage vacuum relays ZK<1>, ZK<2>, and an insulating detection instrument through insulation against ground resistors RM<1ground>-RM<1ground> of to-be-tested electric motors M<1>-M<n> with neutral points of the star winding of the electric motor as detection points. A high voltage energized display DX can provide electric interlock protection when an accident happens and the detection main circuit is energized while the detection main circuit is detected. Theapparatus has the characteristics of safety and reliability, accurate detection and simple operation. The apparatus can automatically complete starting, discharge examination, detection and other procedures after a detection command is transmitted, and displays insulation resistor RM<ground>, absorption ratio DAR, polarization index PI and other insulation parameters of the electric motor M in a digital window of a M<ohms> tester. The M<ohms> can print, save, and communicatively upload data, and completely overcomes the inconvenience and complexity of manual insulation detection of a high voltage electric motor.

The invention discloses an operation method and device of a grounding wire. The method comprises the following steps of receiving a request message for requesting to take out the grounding wire from a storage container in a locking state; responding to the request message to acquire state information on to-be-grounded equipment connected with the grounding wire; returning a response message for refusing to take out the grounding wire from the storage container and indicating that the storage container keeps the lock state if the state information is used for indicating that the to-be-grounded equipment is in a charged state; returning a response message for allowing to take out the grounding wire from the storage container and indicating that the storage container is switched from the locking state to an unlocking state if the state information is used for indicating that the to-be-grounded equipment is in an uncharged state. In the embodiment of the invention, the grounding wire is not allowed to be taken out from the storage container when the to-be-grounded equipment is in the charged state, so the technical problem of lower operation safety caused by error operation is solved.

The invention is suitable for the technical field of electric power measurement, and provides an online measuring device of inductive voltage of a cable sheath. Instead of using PT for electrical isolation, the inductive voltage of the metal sheath is directly connected to the detection circuit of the measuring board for measurement, the measuring board is powered by the isolation power supply, and the measurement result is transmitted to the main control board at the back end through the isolation serial port, so as to achieve the electrical isolation effect of the signal acquisition end andthe control end at the back end. As an electric signal is electrically connected to the metal sheath of the cable directly, the online measuring device is not affected by the magnitude of the inductive voltage, is high in sensitivity and accuracy, discovers potential fault risks in time, provides technical basis and reference for the adjustment and optimization of cable grounding methods and sheath protector selection of cable operation units, can effectively prevent operating accidents and prolong the operating life of medium and high-voltage crosslinked cable lines.

The utility model relates to a substation switchgear room temperature and humidity control system and belongs to the technical field of substation switchgear room temperature and humidity control systems. According to the substation switchgear room temperature and humidity control system provided by the technical schemes of the invention, a temperature and humidity control system operation box, aheater and a dehumidifier are arranged in a substation switchgear room; fans are installed on the wall of the substation switchgear room; a temperature sensor and a humidity sensor are disposed on thewall top of the interior of the substation switchgear room; a control computer is disposed in the temperature and humidity control system operation box; the front surface of the control computer is provided with an LCD display screen, a keyboard, and an alarm device; a central controller is arranged in the control computer; the central controller is connected with the display screen, the keyboardand the alarm device through wires; and the signal input ends of the central controller are respectively connected with the temperature sensor and the humidity sensor. The substation switchgear roomtemperature and humidity control system of the invention is installed in and applied to a substation switchgear room.