60results about How to "Implement state detection" patented technology

The invention relates to a high-reliability landing gear control system. The high-reliability landing gear control system comprises a control driving unit and an EMAC driving circuit, wherein the control driving circuit comprises a power supply transformation power distribution module, a 1553B bus interface module, a CPU processing unit, a steering motor driving circuit, a solenoid valve driving circuit and an analog quantity signal processing circuit, wherein the CPU processing unit comprises a taking-up and releasing control module, a front wheel steering control module and an anti-skid braking driving control module; the landing gear control system adopts a driving and control integrated design, the CPU processing unit can be used for achieving combined control on taking up and releasing of a landing gear and a cabin door, the steering of a front wheel, and the anti-skid braking of an electro-mechanical actuator of a main engine wheel, and the system is light in weight, low in power consumption, high in reliability and good in environment adaptation, and can be widely applied to novel spacecraft landing recovery systems and traditional aircraft landing gear systems.

The invention provides a dynamic test detecting platform for a metal structure of a crane, comprising a vibrating system, an excitation system, a data collecting and analyzing system and a track. By using the dynamic test detecting platform for the metal structure of the crane, various loads of the crane in a working or non-working state, like a seismic load, body shaking of a floating crane, cart emergency brake, a collision load of a cart buffer, road spectra, a hoisting load, a cargo deflection load, sudden rising of cargo, falling of a lifting appliance or cargo unloading, a periodic fatigue load and a combination of the loads, can be simulated; dynamic response signals of a crane test piece, such as data of a stress, strain, a displacement, an acceleration and the like, can be collected, processed and displayed to detect the state of the crane test piece; and the dynamic test detecting platform is suitable for dynamic experiment detection of the whole crane or the metal structural part.

The invention relates to a frame-type circuit breaker fault diagnosis and degree evaluation method based on operating accessory current. The method includes the steps of firstly determining the working stages, including an energy storage stage, a closing stage and an opening stage, of the circuit breaker to be diagnosed and evaluated, then using the current of an energy storage motor to diagnose fault during the energy storage stage, and using the current of a closing coil to diagnose fault during the closing stage, using the current of the opening coil to diagnose fault and assess degree during the opening stage, respectively detecting the current signals of the energy storage motor during the energy storage stage, the current signals of the closing coil to diagnose fault during the closing stage and the current signals of the opening coil during the opening stage, conducting fault diagnosis with a multi-core support vector machine, and accurately determining the fault degree through a fault degree characteristic curve when the degree of the fault diagnosed has to evaluated.

The invention discloses a side parking state detection method and device, and belongs to the field of automatic control. The method comprises the steps of acquiring a driving track of a target vehiclewithin a first preset duration; judging whether an intersection point exists between the driving track and the boundary of a side parking area; determining whether the target vehicle is in a to-be-marked state of the side parking according to the driving track and the driving state of the target vehicle after the first preset duration is ended if an intersection point exists between the driving track and the boundary of the side parking area; wherein the to-be-marked state is a parking storage state or a parking driving-out state. The state detection of the side parking is realized by determining whether the target vehicle is in a parking storage state or a parking driving-out state. The method and device are used for detecting the state of side parking.

The invention discloses a detection device and a detection method for a cable status of a transponder. The detection device is connected onto the output end of the transponder connected with a trackside electronic unit. The detection device comprises an acquisition module and a phase discrimination module, wherein the acquisition module is used for acquiring the voltage and the current of the output end of the trackside electronic unit; the phase discrimination module is used for comparing the phase of the acquired voltage with the phase of the acquired current; if the phase of the voltage is in advance of the phase of the current, a cable of the transponder is judged to be short-circuited; if the phase of the current is in advance of the phase of the voltage, whether the phase difference between the current and the voltage is less than or equal to a preset threshold value or not is judged; if the phase difference between the current and the voltage is less than or equal to the preset threshold value, the cable of the transponder is judged to be open-circuited; and if the phase difference between the current and the voltage is not less than or equal to the preset threshold value, the cable of the transponder is judged to be normal. According to the detection device for the cable status of the transponder, the cable status can be detected under the condition of long distance, and the open-circuited status, the short-circuited status and the normal status are correctly distinguished.

The invention discloses a system and a method for measuring the settlement and inclination angle of a transmission tower based on optical measurement, and relates to measurement methods for settlementand inclination angles of transmission towers, aiming to solve the defects of low efficiency, high labor intensity and inability to judge quantitatively in the prior art. The method includes preprocessing collected images of fixed landmarks; extracting corner points; calculating translation matrixes of a camera coordinate system and a world coordinate system according to the extracted corner point information; repeating the above steps until translation matrixes of images of all the fixed landmarks as well as the translation matrix increment are acquired; according to the translation matrix increment, determining the settlement displacement variation of the transmission tower in the world coordinate system to acquire the inclination angle of the transmission tower; giving out an alarm when the settlement displacement variation or the inclination angle of the transmission tower exceeds a set threshold value. The system and the method are applied to the field of measurement of the settlement and inclination angles of the transmission towers.

The invention relates to an ultrasonic echo denoising method for ultrasonic testing of a transformer high voltage bushing lead. The method comprises the steps of: (1) performing wavelet decompositionon a ultrasonic echo signal reflected by a transformer high voltage bushing lead; (2) performing denoising preprocessing on the ultrasonic echo signal; (3) performing EEMD decomposition on the denoising preprocessed echo signal to obtain a multi-layer IMF component; 4) solving the noise component standard deviation of the denoising preprocessed signal, wherein the first two layers of the IMF component filter the noise in the signal by using a new method "2 sigma rule", and remaining IMF component denoise using an adaptive threshold; (5) calculating a correlation coefficient between the twice denoised IMF component and original component, selecting the IMF component to be retained according to the coefficient for a signal reconstruction, and obtaining the denoised ultrasonic echo signal. Compared with the prior art, the method can effectively filter out random noise in the ultrasonic echo signal, maximize the integrity of the echo signal, and better recognize the oscillation starting position of the echo signal.

The invention discloses a distributed optical fiber sensor based expressway protective fence damage positioning system and a method thereof, and belongs to the optical field. The distributed optical fiber sensor based expressway protective fence damage positioning system includes: expressway detection station modules, wherein each expressway detection station module includes a distributed Brillouin temperature strain analyzer and a channel expansion module; an expressway detection module including strain cables and protective fences; and an expressway communication module including a network unit, an expressway data center, and a service terminal. The strain cables are fixedly mounted on the protective fences in a S-shaped arrangement manner; top ends of the strain cables are connected toports of the channel expansion modules through end-to end optical fiber splices; ports of the channel expansion modules are connected to optical interfaces of the distributed Brillouin temperature strain analyzers through optical fiber patch cords; the distributed Brillouin temperature strain analyzers are connected to an expressway data center through the network unit; and the expressway data center is connected to the service terminal. The distributed optical fiber sensor based expressway protective fence damage positioning system effectively achieves the natural disaster early warning and special traffic safety accident alarm along the expressway.

An impeller unbalance detecting system of a double-fed wind power generator comprises a data collecting and processing module, a man-machine interface, an alarm processing module and a detecting diagnosis sub system. The data collecting and processing module is used for collecting electric quantity information, digital quantity and position information of an electric generator. The man-machine interface is connected with an upper computer through an Ethernet interface, displays the current, the rotation speed, the characteristic frequency and the amplitude information of the electric generatorin real time, and sets threshold valve parameters. The alarm processing module gives the diagnosis result through the set detected characteristic frequency threshold value and the characteristic amplitude calculated in real time; the detecting diagnosis sub system conducts unbalance diagnosis of the impeller unbalance detecting system by utilizing wavelet transformation, Hibert and FFT processingand model prediction, and outputs the characteristic result to the alarm processing module. The impeller unbalance detecting system can be widely applied to real-time online monitoring of unbalance of an impeller of the double-fed wind power generator, and reports to the police, guarantees are provided for safe and reliable operation of blades, and the impeller unbalance detecting system has wideapplication prospects.

The invention discloses an intelligent monitoring system for a power distribution room. The measurement and control functions of the low-voltage side and low-voltage outgoing line of a distribution transformer can be realized by using an intelligent controller and a concentrator; detection of phase loss, zero break, overload, electric leakage can be realized; and the releasing of an ordinary molded case circuit breaker can be controlled, so that protection can be performed on personal security and user equipment, and user faults can be prevented from enlarging to affect medium voltage power grids. A controller is connected to the concentrator through zigbee in a wireless manner, and data can be transmitted to a user mobile phone APP through a GPRS after collected by the concentrator, so that the real-time monitoring of the operation states of low-voltage outgoing line switches can be realized; and through the adoption a plurality of technological means such as self-describing protocols, wireless transmission, multi-device cascade, CT open circuit overvoltage protection, clip electricity taking, integral fixation of the controller and CT, on-site installation without power failure,the reduction of line paving due to wireless interconnection, and unified protocols for easy debugging can be realized, so that construction efficiency can be greatly enhanced.

The invention discloses a simulation testing system of a non-volatile memory (NVM) built-in self-testing circuit. The simulation testing system of the NVM built-in self-testing circuit comprises a testing host computer, a plurality of simulation modules, an NVM chip circuit, the NVM built-in self-testing circuit, and an automatic detection module. The automatic detection module specifically comprises an interface signal detecting module, a system state detecting module, an instruction execution timing sequence detecting module, a test integrity detecting module, a data output module, and a test vector output module. According to the simulation testing system of the NVM built-in self test circuit, workload of detection of the NVM built-in self-testing circuit is greatly reduced, and integrity of a test is guaranteed.

The present invention relates to a neutral point clamping type multi-level converter direct current capacitor state detection method, comprising following steps: 1) direct current capacitor discharge:discharging the direct current capacitor of a neutral point clamp type multi-level converter, so that a voltage of the direct current capacitor drops to a safe voltage; 2) direct current capacitor resonance test: controlling a gate pulse of a switching device in any two phases of bridge arms in the neutral point clamping type multi-level converter to generate LC resonance between corresponding two phases of load inductances; 3) direct current capacitance detection: obtaining resonance current waveform data according to the detection and obtaining a magnitude of the direct current capacitor through a nonlinear regression algorithm. Compared with the prior art, the method has the advantages of simple testing, safe testing, fast discharging, high precision, comprehensive consideration, strong versatility and the like.

The invention discloses an active antenna detection device. The active antenna detection device comprises an active antenna, a biasing circuit, a first comparator, a second comparator and a logic output circuit, wherein the logic output circuit is used for receiving output signals of the first and second comparators to obtain detection results, outputting the detection results, and meanwhile, outputting a feedback signal to the biasing circuit; the active antenna is connected with the input end of the first comparator, the input end of the second comparator and the output end of the biasing circuit, the output end of the first comparator and the output end of the second comparator are connected to the input end of the logic output circuit, and the output end of the logic output circuit isconnected to the biasing circuit. By means of the active antenna detection device, detection of the state of the active antenna can be achieved without affecting the performance of the antenna, and the device has a current-limiting function. The invention further discloses a detection method of the detection device.

The invention discloses a driving circuiting of a stepping motor. A current detection sensor is used for conducting zero crossing detection on the current of the stepping motor; then, the number of times the current value at a zero crossing point of the stepping point exceeds a preset value is counted in an accumulation mode through an accumulating counter; accordingly, a controller of the stepping motor can judge whether the stepping motor has rotation blocking or loses efficacy according to the number of times the current value at the zero crossing point of the stepping point exceeds the preset value and preset conditions. State inspection of the stepping motor can be realized without a position sensor which is used in the prior art and increases the cost, so that the problem of high cost in the prior art is solved.

The invention discloses a valve lock and a valve management and control system, and provides a lock for locking and managing and controlling a valve. The lock is characterized in that a fixed lock body is fixedly arranged on a handwheel pressing part of the valve, wherein a movable lock body is locked to or released from the fixed lock body through a fixing mechanism, so that a handwheel interference mechanism which is arranged on the movable lock body is capable of limiting the rotating of a handwheel. The valve lock has the characteristics of being stable in structure, practicable and reliable. Additionally, the valve state can be detected in a manner of arranging an electromagnetic element on a valve rod, arranging a valve state detector on the movable lock body and arranging a state detecting circuit in the lock. The valve lock can be matched with a computer key, a parameter acquiring device and a management host computer to form a complete set of valve management and control system which realizes systemic management and monitoring on the valve unlocking and locking control and on-off state detecting.

The invention provides a laser pipe cutting chuck signal control device. A charging panel module, a lithium battery module, a wireless transmission plate module and a chuck detection sensor module arearranged in a rotary body of a chuck. A wireless receiving plate module is arranged on a shell of the chuck. The laser pipe cutting chuck signal control device can automatically and effectively achieve state detection of the chuck, transmit the chuck state to a pipe cutting machine upper system. The pipe cutting machine upper system can make working arrangement according to the received chuck information. Intellectualization and automation of equipment can be improved. The safety protection of the chuck is greatly improved. The additional value of the chuck is increased. The labor intensity of operating workers can be reduced.

The invention provides a terminal detection method, a terminal and a storage medium. The terminal detection method comprises the following steps: controlling the vibrator to enter the vibration mode and acquiring the first data of the motion detection device; controlling the vibrator in a non-vibrating mode and acquiring second data of the motion detection device; based on the first data and the second data, determining whether the vibrator and / or the motion detection device is in a normal state. The invention realizes the state detection of the vibrator and the motion detection device.

The invention relates to a detection circuit, a detection method and a chip. The detection circuit comprises two transmit-receive circuits, differential ports between the two transmit-receive circuits are connected with each other, each transmit-receive circuit comprises a transmitting circuit, an echo cancellation circuit, a switching circuit and a receiving circuit, a first output end of the transmitting circuit and a first input end of the echo cancellation circuit form a first path, and a second output end of the transmitting circuit and a second input end of the echo cancellation circuit form a second path; the second output end of the transmitting circuit, the switching circuit and the second input end of the echo cancellation circuit form a second path, and the receiving circuit is used for determining whether the differential port is abnormal or not according to the output signal of the echo cancellation circuit when the switching circuit conducts the second path. The detection circuit can realize differential port state detection without adding an additional analog circuit, and whether the differential port is abnormal can be determined only by controlling the working state of the echo cancellation circuit through the switching circuit, so that the scale of the detection circuit can be reduced on the basis of ensuring the differential port state detection function.

The invention relates to the field of industrial equipment fault detection, and discloses an axle temperature fault detection method based on an NEST and SPRT fusion algorithm, and the method comprises the steps: obtaining a motor train axle temperature historical data feature set, carrying out the feature dimension reduction of the motor train axle temperature historical data feature set, and obtaining a motor train axle temperature feature parameter after dimension reduction; obtaining a bullet train axle temperature historical normal sample set corresponding to the bullet train axle temperature characteristic parameters after dimension reduction, establishing an NSET model, and obtaining a memory matrix D of the NSET model by utilizing the bullet train axle temperature historical sampleset; obtaining bullet train axle temperature test data, and outputting a bullet train axle temperature residual error sequence by the NSET model according to the memory matrix D; and carrying out variance test on the axle temperature residual error sequence of the motor train by using an SPRT test method to obtain an axle temperature state fault detection result. According to the invention, statedetection of all axle temperature can be realized through one-time modeling, fault early warning of the axle temperatures can be indirectly realized, and the invention has general universality for solving motor train unit equipment faults.

The invention provides a power grid state detection method, device and static transfer switch cabinet, applying to a voltage source droop control feature grid-connected inverter. Firstly, sending the current acquisition value and the voltage acquisition value in the load-end by a load-end sampling apparatus, and according to the droop control feature and the droop parameter setting value issued by the controller, then calculating frequency and calculating voltage in the load-end are calculated; Then judging whether the difference value between the calculating frequency and the frequency acquisition value in the load-end is less than the first preset difference or not, and whether the difference value between the calculating voltage and the voltage acquisition value in the load-end is less than the second preset difference or not; If the difference values are all less than the preset differences, the power grid state of the grid-connected inverter is determined as tripping power-losing for the power grid; If not, the power grid state of the grid-connected inverter is determined as normal power supply for the power grid; In this way, the state detection of the voltage source droop control feature grid-connected inverter is achieved.

The invention provides a grid-connected inverter system, wherein the controller can judge whether the grid-connected switch device is faulty or not according to the output signal of the voltage acquisition device, thereby realizing the state detection of the switch of the grid-connected device. Moreover, each two of the four switches in the grid-connected switching device are controlled by the same control signal output by the controller, so that the occupation of the controller resources is reduced compared with the prior art, and the problems in the prior art are solved.

The embodiment of the invention relates to a self recovery system and a state detecting method of the self recovery system. The technical problem that during recovery of the current independent watchdog, a projector is in a standby state all the time after the projector is reset, and then a screen is black and does not display in the standby state is solved. The self recovery system comprises a monitoring module, a control module and a latch module, wherein the monitoring module and the control module are electrically connected; the latch module is electrically connected with the control module and is used for locking the working state of the system; the control module is used for acquiring a reset signal of the monitoring module to reset a host machine; a state type output by the latch module is detected, if the state type is a default state, the host machine enters the standby state, and if the state type is a reset abnormal state, a preset abnormity processing mode is executed, so that the host machine is reset to the working state before abnormity; the reset abnormal state is that the state type output by the latch module is the last preset state after the host machine is started.

The invention provides an intelligent safety control system for a vehicular hybrid power source. The system comprises a hybrid power source module, a battery state monitoring system, a single battery charging system, a digital isolation and signal transmission module, a master controller, a touch screen control system and a collision monitoring protection system. The battery state monitoring system and the single battery charging system are connected with the hybrid power source module. The digital isolation and signal transmission module is connected with the battery state monitoring system, the master controller is connected with the digital isolation and signal transmission module and the single battery charging system, and the touch screen control system and the collision monitoring protection system are connected with the master controller. A collision power-off driving circuit and a touch screen control circuit are connected between the master controller and the hybrid power source module. By the intelligent safety control system, charging-discharging balance and safety of the hybrid power source in an operating process are realized. The intelligent safety control system has advantages that vehicle collision strength can be monitored so as to take initiative protection measures, and energy utilization efficiency of the hybrid power source can be improved.

The invention discloses a power failure protection circuit and application thereof. The power failure protection circuit comprises a main circuit, a power supply circuit, a detection circuit and a logic control circuit; the main circuit is a bidirectional silicon controlled rectifier switching circuit with an optoelectronic isolator U4; the power supply circuit is a half-wave rectification circuit; a switch SW1 is arranged between the power supply circuit and the detection circuit, the detection circuit comprises a time delay circuit and a switch state detection circuit, and state detection ofa power grid and the switch SW1 can be realized; the logic control circuit comprises NAND logic controllers U1, U2 and U3, and controls the level of an input pin 2 of the U4, thereby controlling thevoltage difference between a pin 1 and a pin 2 of the U4, thereby achieving the control of the bidirectional silicon controlled rectifier. When the working circuit is suddenly powered off during operation, the power grid and switch detection signals are abnormal, the circuit stops operating, and the switch SW1 is not switched off; and after electrification, the power grid is detected to be normal,but the switch is detected to be in a closed state, the logic control circuit does not output a trigger signal, the main circuit is started, and normal operation can be realized only by switching offand switching on the switch.

The invention discloses a direct-current centralized lighting system and a method for measuring the lamp state of the direct-current centralized lighting system. The direct-current centralized lighting system comprises a direct-current distribution box and a plurality of lamp units; the direct-current distribution box converts a command protocol controlling the lamp state into a voltage signal with amplitude change to be output through a power line; each lamp unit comprises a lamp, a power conversion unit and an artificial load unit, wherein the power conversion unit is coupled to the lamp andthe artificial load unit, and coupled to the direct-current distribution box through a power line; the power conversion units receive a voltage signal, and judge whether the voltage signal is matchedwith a preset treaty rule or not; if the voltage signal is matched with the preset treaty rule, the power conversion units collect state information of the lamps; the power conversion units control the artificial load units to act, and a current signal corresponding to the state information of the lamps is obtained and transmitted back to the direct-current distribution box through a power line;and the direct-current distribution box analyzes the current signal to obtain the state information of the lamps.

The invention relates to the field of Internet education. The invention discloses an intelligent classroom electronic class board and entrance guard control system and method, the system comprises a webpage end, a server end, at least one class board end and a corresponding entrance guard end, wherein the webpage end is used for sending a request to the server end according to user demands, and polling and displaying the current state of the class board end; the server end is used for generating a service data packet according to the request from the webpage side, sending the service data packet to the corresponding class board end, and monitoring and recording the current state of the class board end in real time; and the class board end is used for executing corresponding page switchingand data information display according to the received service data packet and controlling the entrance guard end corresponding to the class board end.

The invention provides an air switch state detection device, an air switch and an air switch state detection system. The air switch state detection device comprises an interlock lever, a state detection element, a microgeneration device, a power conditioning memory circuit, a CPU module and a wireless signal transmission module. The microgeneration device converts mechanical energy operating the air switch into electrical energy. The power conditioning memory circuit powers the CPU module and the wireless signal transmission module. The CPU module acquires an air switch state signal output by the state detection element and transmits the signal to a wireless signal receiving module through the wireless signal transmission module. Finally, the wireless signal receiving module transmits the signal to a signal acquisition system. Air switch state detection is realized. The state signal is wirelessly transmitted. The air switch state detection device does not need an additional power supply, which facilitates the transformation construction of air switch state detection and reduces investment.