248results about How to "Achieve damage" patented technology

The invention discloses a whole precast prefabricated concrete frame structure, consisting of a precast pole and a horizontal beam that are mutually fixed. The precast pole is provided with an exserted level cantilever beam, the end of the exserted side of cantilever beam is provided with a gap; the end of the horizontal beam is provided with a boss that is matched with the gap arranged on the end of the cantilever beam; the horizontal beam and the cantilever beam are fixedly connected after the matching of the boss and the gap. The upper end, the lower end and the side of the cantilever beam ends are respectively provided with preburied metal plates, the upper end, the lower end and the side of the horizontal beam are also provided with preburied metal plates and the preburied metal plates arranged on the cantilever beam ends and the cantilever beam ends arranged on the horizontal beam are fixedly connected through a mental plate arranged on the top. Compared with the prior art, the invention has the advantages of reliable connection, reasonable structure, fast field construction, anti-seismic, etc.

The invention provides an underground construction surrounding rock disaster whole time interval induced polarization monitoring method, and belongs to the technical field of mining industry and geotechnical engineering security detection and monitoring. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method relates to a power supply electrode (1), a measuring electrode (2), a digital direct current induced polarization instrument (3), a main control computer (4) and an acousto-optic warning device (5). The power supply electrode (1) and the measuring electrode (2) are respectively connected with the digital direct current induced polarization instrument (3) through connecting wires, the digital direct current induced polarization instrument (3) is mutually communicated with the main control computer (4), the main control computer (4) is communicated with the acousto-optic warning device (5), the power supply electrode (1) and the measuring electrode (2) are arranged in an underground construction roadway or a tunnel surrounding rock monitoring region, and the digital direct current induced polarization instrument (3) and the main control computer (4) record and analyze monitored polarizability of the underground construction roadway or a tunnel surrounding rock in interval time periods in real time. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method has the advantages of being large in monitoring range, high in safety, damage-free, real-time and reliable in monitored data, and capable of early warning in a grading mode.

The invention discloses a high-speed train wheel set damage identification test bed based on wheel vibration acceleration response. The test bed comprises a proportional bogie, a proportional train body, a proportional rail, a power loading and control system, a data acquisition system and a signal processing and analysis system, wherein the proportional train body is connected with the wheel setthrough the proportional bogie, the proportional bogie comprises an axle box, a framework, a primary spring, a transmission and a motor, the motor drives the transmission connected with the axle to provide traction force for wheel set movement, and the axle is connected with the wheel set and is hollow; the power loading and control system comprises a vertical vibration exciter, and the vertical vibration exciter acts on the lower portion of the proportional rail; the data acquisition system comprises sensors, and the sensors include a stress-strain gauge, a displacement sensor and an acceleration sensor. Experimental studies such as vibration response stress-strain test, wheel-rail force load identification, vehicle traction control, wheel noise reduction performance optimization and thelike can be carried out at the same time, and damage caused by abrasion, scratch and the like of the wheel set, especially the axle, can be accurately detected.

The invention discloses an active learning-based image detection method for a liver injury type. The method comprises the specific steps of 1, locating and extracting a liver target region from an abdominal medical image set by using a liver active shape model; 2, defining and extracting direction mode eigenvectors and grayscale range change mode eigenvectors of pixel points in the liver target region; 3, performing liver pixel density clustering center definition and clustering division based on a two-dimensional space of local density of the pixel points in the liver target region and a minimum distance from one pixel point to another pixel point with the higher density; and 4, performing image detection of the liver injury type based on an active learning method of liver pixel density clustering edge, clustering center and clustering division.

The invention discloses an online fault diagnosis method and system for a centrifugal pump. According to the method, a vibration sensor is utilized for measuring a radial vibration signal in the operating process of a pump; the radial vibration signal is transmitted to a signal processing module; analysis treatment is conducted based on the cyclostationary theory so that a cyclic autocorrelation function can be obtained and subjected to slice analysis; feature parameters for distinguishing whether the pump breaks down or not and recognizing the breakdown type after it is determined that the pump breaks down are obtained; and a relevant breakdown diagnosis result is obtained by performing comparison and analysis on the feature parameters and corresponding parameters generated when the pump runs normally under the design working condition. According to the online fault diagnosis method and system for the centrifugal pump, diagnosis on mechanical seal damage and cavitation failures can be achieved by measuring the radial vibration signal of the pump, the running feature information of the pump can be reflected in the vibration signal in real time, the information integration degree is high, the number of signal transfer paths is small, the anti-jamming capability is high, and measurement reliability is high; and by analyzing stable components in the cyclic autocorrelation function of the signal, the situation that running is unstable due to the bias condition and consequently signal analysis is disturbed can be avoided, and specific reasons which cause unstable flowing of the centrifugal pump are identified.

The invention relates to a system for detecting settlement and damage of a manhole cover by using sensor data generated by rolling by a vehicle. The system comprises a data collection terminal, an operation service management platform and a user terminal. The data collection terminal is arranged at the manhole cover for collecting the generated acceleration data and/or state data generated by rolling of a manhole cover by a vehicle, and sending the acceleration data and/or state data to an operational service management platform. The operational service management platform is used to determinethe settlement of the manhole cover based on the acceleration data, and/or to determine the damage of the manhole cover according to the state data, and to send alarm information and task work orderinformation to the user terminal when it is determined that the manhole cover is settled or damaged; and the user terminal is configured to receive, display and feed back the alarm information and thetask work order information. The system can employ the sensing data generated by rolling by a vehicle to monitor the settlement and damaging conditions of the manhole cover to allow municipal management personnel to timely and accurately grasp the working state of the manhole cover and reduce the inspection work intensity of the manhole cover maintenance personnel.

The invention provides an overcurrent fault monitoring protection device and method for a flexible direct-current transmission inverter station and relates to the technical field of power system control. The device comprises a microprocessor unit, a composite buffer protection unit, a power frequency conversion unit, an IGBT drive unit, an overheating detection unit, a fault current detection unit, a wireless communication unit, an LC filter and an upper computer, wherein a microprocessor processes the current and temperature information acquired by the overheating detection unit and the fault current detection unit, drives the IGBT drive unit to control the on/off of the IGBT device and transmits the fault information to the upper computer. In the invention, the type of the fault current and the overheating fault of the power frequency conversion unit can be detected and positioned, the detected fault current is positioned, classified and processed so as to quickly and accurately inhibit the short-circuit current and overcurrent in the fault period, the damage of the power frequency conversion unit is avoided, and the monitoring position and protection of overcurrent fault of the flexible direct-current transmission inverter station are realized.

The invention discloses a preparation method of self-repair type shape memory polyurethane containing a diselenide bond. The polyurethane is obtained by performing pre-polymerization on diisocyanate and polyester diol and then performing block polymerization with diselenide diol. The polyurethane can realize a shape memory function under a relatively mild condition (30-60 DEG C) on the basis of the crystallization reversibility of a polyester molecular chain and the dynamic exchange characteristic of the diselenide bond, and simultaneously can realize repair of cut cross sections of materials,scratches and other damages. The synthesized polyurethane is of a multi-block structure, takes crystalline polyester diol as a soft segment, takes diisocyanate and diselenide diol containing dynamiccovalent bonds as a hard segment, and has good molecular structure designability; and by adjusting the components and proportions of the soft segment and the hard segment, self-repair and shape memoryfunctions of the polyurethane can be effectively adjusted. The polyurethane can be applied to the fields of intelligent packaging, electronic devices, biomedical materials and the like.

The invention discloses a tunnel rock soil deformation monitoring method, and particularly discloses a novel tunnel non-contact deformation monitoring method. A thickness R0 value of a plastic area is calculated. A sensor installing hole is drilled in a surrounding rock. One anchoring end is arranged at the tail end of an optical fiber single point displacement sensor. The anchoring end penetrates from the installing hole through the plastic area to be buried in an elastic area and fixed. The optical fiber single point displacement sensor is arranged in the plastic area. The top end, i.e. a flexible point, of a telescoping probe of the sensor is fixed on a tunnel excavation interface and used for measuring data. Deformation of the plastic area is calculated according to the value measured by the optical fiber single point displacement sensor. The monitoring data are transmitted to a tunnel port via optical fibers. During the process, consumption of manpower resource is low, the monitoring data are not manually influenced, loss and damage of the data in cable transmission can be effectively avoided, and an objective of automatic real-time monitoring can be realized via arrangement of the sensor device.

The present invention discloses a power output protective circuit and device. The protective circuit comprises a sampling module, a switch control module and a processing control module. The power voltage received by the sampling module is converted to sampling voltage in proportion, the processing control module confirms load short circuit or overcurrent when determining that the sampling voltage is not larger than a preset overvoltage, sends cut-off control signals to the switch control module and controls the switch control module to stop transmission of received power voltage to the sampling module so as to overcurrent protection. The processing control module sends conduction control signals to the switch control module when determining that the sampling voltage is larger than the preset overvoltage, controls the switch control module to perform continuous conduction to go on transmission of the received power voltage to the sampling module, and performs voltage division of the received power voltage through the sampling module to transmit the voltage to the output end of the power supply so as to supply power to the load. Therefore, the power output protective circuit and device can avoid the problem of damaging of a power supply connected with the input end of the power supply when the load short circuit or overcurrent.

The invention provides a double parallel active power filtering apparatus which comprises a DSP, a power supply, a voltage current sampling module, a serial port communication module, an IGBT gate pole drive circuit, a high frequency APF circuit and a low frequency APF circuit. An input terminal of the voltage current sampling module is connected to an electrical network, and an output terminal of the voltage current sampling module is connected to a DSP pin. An output of the DSP is connected to a pin of the IGBT gate pole drive circuit. An output of the IGBT gate pole drive circuit is connected to an IGBT of the high frequency APF circuit and the low frequency APF circuit respectively. The high frequency APF circuit and the low frequency APF circuit are connected to the electrical network back. The power supply and the serial port communication module are externally connected to a DSP port. A voltage transformer is in parallel connection with a current transformer to acquire a signal, a high frequency circuit is parallel connection with a low frequency circuit and the signal is returned to the electrical network, the DSP is taken as a processing unit, a harmonic wave is effectively filtered, and electrical network current is accurately tracked. A soft switch drives the IGBT gate pole drive circuit, zero voltage zero current connection and disconnection of the IGBT are realized, resonance loss is reduced effectively, and precision is raised.

The invention relates to a novel tank type fuel transporting and refueling truck. The novel tank type fuel transporting and refueling truck mainly comprises a vehicle chassis system, a fuel pumping transmission system, a fuel tank system, fuel loading and unloading pipelines, an external 380-volt power supply pump assembly, a control system and a security protection system. The right of the truck body is provided with a control cabinet, and a DN65 (nominal diameter) three-way ball valve, a three-way screen, DN65 straight-through ball valves, a bottom valve air control switch, a CRJ rapid joint anode strip plugging cover, a pipeline pressure meter and a vacuum meter are arranged inside the control cabinet, so that the functions of bottom fuel loading during fuel loading of the truck and automatic-flow fuel unloading, pump discharging and refueling; the left of the truck body is provided with an operating cabinet which is provided with two Censtar refuelers, DN25 straight-through ball valves, a 10-meter one-inch refueling rubber hose refueling gun and the like. The novel tank type fuel transporting and refueling truck replaces a traditional fuel loading manner with the bottom fuel loading manner and performs totally-closed loading, thereby having significant influence on environmental protection and human health ensurance; subsea valves can achieve bottom fuel loading and unloading, so that safety, environmental protection, high efficiency and operative convenience can be obtained.

The invention relates to a positive-pressure air sealing device with an anti-blocking function. The positive-pressure air sealing device with the anti-blocking function comprises an air sealing deviceshell body, a charge port and a discharge port which are connected to the air sealing device shell body, a rotary shaft connected into the air sealing device shell body, blades connected to the rotary shaft, and a drive mechanism driving the rotary shaft to rotate, wherein a plurality of arc-shaped movable plates are connected between the interior of the air sealing device shell body and the blades through telescopic mechanisms; the plurality of arc-shaped movable plates are mutually spliced in a matching manner to form an inner cavity of the air sealing device; and a pressure sensor electrically connected with the corresponding telescopic mechanism is connected to each arc-shaped movable plate. The air sealing device has a function of automatically adjusting gaps between the blades and an air sealing device housing in a use process, that is, the air sealing device is capable of automatically adjusting in the case of blocking between the blades and the air sealing device housing, damage to the blades of the air sealing device is avoided, lots of time for equipment maintenance is avoided, and high working efficiency is achieved.

The invention discloses a three-dimensional metal printing method integrating a machining technology and three-dimensional metal printing equipment. The three-dimensional metal printing method comprises the core steps of: adopting molten or softened and flowable metal to be contacted with printed metal in a three-dimensional printing process, applying electric current between the molten or softened and flowable metal and the printed metal, rising the temperature of or melting a contact part between the printed metal and the molten or softened and flowable metal by a resistance heating mode to form a metal part with high structural strength, and further machining the printed metal with a cutter. The generated metal part has high density and forming precision; a printing process of each pixel point is monitored; a detachable auxiliary bracket, a printable large part and a damage repairable metal part can be generated synchronously; the equipment is simple in structure and the cost is low. The method and the equipment have a substantial progress.

The invention discloses a hybrid coupling and an assembling method thereof. The coupling comprises a driving disc and a driven disc. The driving disc comprises a connecting cylinder, back iron blocks,first magnetic rings and second magnetic rings. The driven disc comprises a connecting sleeve, a back iron disc, a back iron sleeve and third magnetic rings. The connecting cylinder is fixedly connected with a driving shaft. The back iron block is embedded into the connecting cylinder. The first magnetic rings are fixed to the connecting cylinder and cover the back iron blocks. The second magnetic rings are fixed to the end face of the connecting cylinder and connected with the back iron blocks. The connecting sleeve is fixedly connected with a driven shaft. An annular groove is formed in theconnecting sleeve. The back iron sleeve sleeves the connecting sleeve and is positioned in the annular groove. The connecting sleeve sleeves the connecting cylinder, so that the driving shaft and thedriven shaft are coaxially arranged. The third magnetic rings are distributed on the side, facing the second magnetic ring, of the back iron disc. The magnetic poles of every two adjacent third magnetic rings are arranged oppositely. The magnetic field intensity of the coupling is improved; the grooves and magnetic leakage amount of the coupling are reduced; collaboration is improved; the assembling difficulty of the coupling is reduced; a torque is increased through vortexes formed through speed changing; and combination is accelerated.

The invention discloses a vegetable washer comprising an external barrel, an internal barrel, an electric motor and a spraying mechanism, wherein the external barrel is a barrel having a bottom at the lower end and is provided with an opening facing upwards; the internal barrel is rotatably arranged in the external barrel around the central axis in vertical direction and is a cylinder with an opening facing upwards and a bottom at the lower end, and a plurality of through holes are distributed on the whole circumferential wall of the cylinder; the electric motor is arranged below the bottom of the external barrel, an output shaft of the motor is connected with the bottom of the internal barrel directly or through a changeover mechanism, and the internal barrel is driven by the electric motor; the spraying mechanism is used for spraying water toward vegetables in the internal barrel; and a drainage part is arranged in the external barrel, during washing process, when the internal barrel is rotated, the spraying mechanism sprays washing water toward the vegetables in the internal barrel from the radial inner side of the internal barrel, the washing water sprayed on the vegetables and dirties flushed from the vegetables with the washing water are thrown into the external barrel through the through holes of the internal barrel due to rotating centrifugal force and then are discharged outside the vegetable washer through the drainage part of the external barrel.

The invention discloses an agrimonia-pilosa foldable embracing type picking and annular wavy separation front brake protective vehicle. The front brake protective vehicle includes an eccentric foldable embracing type non-destructive picking mechanism, a lifting type conveying mechanism, a flower stalk and leaf progressive driving separation, loading and bearing mechanism, a flower stalk and leaf progressive driving separation mechanism and a rotary circular protective movement mechanism. The lifting type conveying mechanism and the flower stalk and leaf progressive driving separation, loadingand bearing mechanism are arranged on the rotary circular protective movement mechanism, and the eccentric foldable embracing type non-destructive picking mechanism is arranged on the flower stalk andleaf progressive driving separation, loading and bearing mechanism. The invention belongs to the technical field of agrimonia-pilosa picking machines and particularly relates to the agrimonia-pilosafoldable embracing type picking and annular wavy separation front brake protective vehicle, the front brake protective vehicle achieves gathering type picking according to the growth characteristic ofagrimonia pilosa, wavy progressive driving type force is applied to scattered branches and leaves to achieve non-destructive separation of agrimonia-pilosa branches, leaves and stalks, and meanwhileflower stalk separation is achieved through cooperation of automatic control with gravity.