31 results about "Incorrect action" patented technology

The invention discloses a grounding distance protection solution method adaptive to an overload state. The solution method includes: according to impedance measurement ranges of distance relays under an overload condition, constructing load restriction relays which do not act under an overload condition and satisfy an action condition under a grounding fault condition; through a ratio relation of a zero-sequence current and a positive-sequence current, adjusting the action ranges of the load restriction relays so as to realize characteristic dynamic adjustment in different overload degrees; and allowing grounding distance relays of corresponding phases to be used only when the load restriction relays act so as to prevent incorrect actions of the grounding distance relays under an overload condition.

A car reversal radar automatically modifies the sensor scanning range and the method of the same. The car reversal radar includes a central processing unit that has predetermined compensation value and threshold distance. When the car reversal radar starts, its surrounding environment is recorded into an initial detecting value. The initial detecting value is compared with a subsequent detecting value recorded for the environment when the car is being backed. When the subsequent detecting value is greater than the sum of the initial detecting value and the compensation value, the distance between an obstacle and the ultrasonic sensor of the car is compared with the threshold distance. If the former is greater than the latter, the compensation value is increased. Therefore, the obstacle has to even closer to the ultrasonic sensor to reduce the sensitivity of the ultrasonic sensors at the tail and to prevent incorrect actions.

The disclosure provides an approach for detecting and localizing action in video. In one embodiment, an action detection application receives training video sequences and associated eye gaze fixation data collected from a sample of human viewers. Using the training video sequences and eye gaze data, the action detection application learns a model which includes a latent regions potential term that measures the compatibility of latent spatio-temporal regions with the model, as well as a context potential term that accounts for contextual information that is not directly produced by the appearance and motion of the actor. The action detection application may train this model in, e.g., the latent structural SVM framework by minimizing a cost function which encodes the cost of an incorrect action label prediction and a mislocalization of the eye gaze. During training and thereafter, inferences using the model may be made using an efficient dynamic programming algorithm.

The invention discloses a pilot protection method for automatically adapting power converse of a power transmission line. The pilot protection method comprises the following steps: utilizing protected identification elements in forward and backward directions to judge whether the power transmission line is in the condition of power converse according to the sequence of actions of the elements in forward and backward directions; calculating external fault breaker opening time and permissive command pilot protection channel transmission time, and when the power transmission line is judged to be in the condition of power converse, processing the two time to form an additional time delay, so that faulty action does not occur during the power converse through the additional time delay of pilot protection; when the power transmission line is judged to be not in the condition of power converse, not adding the additional time delay of pilot protection. The pilot protection method can prevent incorrect actions of pilot protection during power converse.

The invention relates to the technical field of mobile devices and provides a mobile device protective cover and a method for enabling a touch screen mobile device to be in a dormant state. The method for enabling the touch screen mobile device to be in the dormant state comprises the following steps that when a face cover is closed or opened, a short range sensor detects approaching or leaving of a shielding portion and outputs an approaching signal or leaving signal to a master controller, and a geomagnetic sensor detects a change value of a magnetic field and outputs a magnetic field change value signal to the master controller; in the first time period that the master controller receives the approaching signal, when the magnetic field change value signal is larger than a first preset value, the master controller determines that the face cover of the mobile device protective cover is in a close state and controls the touch screen mobile device to be in the dormant state. The method for enabling the touch screen mobile device to be in the dormant state can avoid malfunction that the touch screen mobile device is in the dormant state when the touch screen mobile device is in a normal screen display state and hands or other objects shield the short range sensor.

The invention discloses a method for determining a protection priority of each component in a wide-area protection communication system. The method comprises: for the importance and reliability of each component in the wide-area protection communication system and incorrect action situations of corresponding protection, performing protection priority division on each component of a local layer with a weight distribution and threshold setting method to determine the protection priority of each component. According to the method for determining the protection priority of each component in the wide-area protection communication system, provided by the invention, the superior performance of wide-area protection is exerted more perfectly, a very good solution is proposed for the problem that information congestion possibly occurs when the wide-area protection communication system has a fault, and the wide-area protection is facilitated to make a more accurate and quicker judgment for taking measures in time to ensure the system to run safely and stably.

The invention discloses a grounding distance protection solution method adaptive to an overload state. The solution method includes: according to impedance measurement ranges of distance relays under an overload condition, constructing load restriction relays which do not act under an overload condition and satisfy an action condition under a grounding fault condition; through a ratio relation of a zero-sequence current and a positive-sequence current, adjusting the action ranges of the load restriction relays so as to realize characteristic dynamic adjustment in different overload degrees; and allowing grounding distance relays of corresponding phases to be used only when the load restriction relays act so as to prevent incorrect actions of the grounding distance relays under an overload condition.

The invention discloses a constant-torque integral broken belt catching device and a catching method thereof. The broken belt catching device consists of a rack, an upper cross beam, a lower cross beam, a rotating shaft, an upper catching rack, a lower catching rack and a driving system, wherein the upper cross beam and the lower cross beam are respectively and fixedly arranged on the upper and lower parts of the rack; the rotating shaft transversely penetrates through the middle of the rack and is arranged on the rack; the upper catching rack is arranged on the rotating shaft and corresponds to the bottom surface of the upper cross beam; the rotating surface of the lower catching rack is downwards articulated with the rack and corresponds to the top surface of the lower cross beam; the driving system consists of two symmetrically-arranged steel wire ropes, two symmetrically-arranged sheave wheels and two symmetrically-arranged weight boxes; the upper catching rack is driven to rotate under the gravity action of the weight box, so that a broken upper-layer rubber belt is supported and clamped, and thus rubber belt catching is realized. When belt breakage occurs, the rubber belt is suddenly accelerated after relaxation, and the upper catching rack and the lower catching rack are triggered to across a dead point so as to rotate respectively towards the upper cross beam and the lower cross beam, so that the rubber belt is rapidly caught. The constant-torque integral broken belt catching device is rapid and accurate in response and free from incorrect action.

The invention discloses a generator power transmitting system and method. The system comprises a power transmitting device, a generator terminal protection-level current transformer TA, a generator terminal measuring-level current transformer and a generator terminal voltage transformer TV. The power transmitting device collects generator terminal three-phase voltages, generator terminal protection-level TA three-phase currents and generator terminal measuring-level TA three-phase currents through the voltage transformer and the current transformer. The fundamental wave effective values of positive sequence voltages, the positive sequence currents of the generator terminal protection-level TA, the positive sequence currents of the generator terminal measuring-level TA and the three-phase currents of the protection-level TA are calculated. When the fundamental wave effective value of the three-phase currents of the protection-level TA is larger than a switching threshold value Iset, power calculation currents are extracted from the protection-level TA, otherwise the power calculation currents are extracted from the measuring-level TA, and a power value is calculated through the positive sequence voltages and the power calculation positive sequence currents. According to the generator power transmitting system and method, generator power abnormal large fluctuation caused by incorrect action of a generator power automatic adjusting system during the system failure can be avoided.

The invention relates to the field of material conveying and discloses a blanking device and a material conveying system. The blanking device comprises a blanking channel provided with a feeding hole and a discharging hole; the blanking device further comprises a material overflowing shell, a material accepting part and a switching device, wherein the material overflowing shell is arranged on the outer surface of the blanking channel; the material overflowing shell is communicated with the blanking channel through a material overflowing hole in a wall of the blanking channel; the material accepting part is arranged in the material overflowing shell and is used for receiving overflowed materials which are overflown into the material overflowing shell through the material overflowing hole; the material accepting part can move and drive the switching device to move when received overflowed materials reach a pre-set quantity, so that a material conveyor located at the upstream of the blanking device is out of work; and furthermore, the blanking device can be used for accurately and reliably detecting blocked materials and completely preventing incorrect actions, so that the materials can be stably and reliably conveyed.

The invention discloses an equipment real-time status-based smart substation soft strap remote anti-misoperation method. According to the method, whether soft strap remote control operation is allowed is judged based on the real-time status of primary equipment and functional completeness of secondary equipment and according to principles that the primary operating equipment cannot operate without main protection, 220kv-or-above equipment cannot operation without failure protection, and a tripping switching-on protection device cannot operate a SV receiving soft strap, if the soft strap remote control operation affects the main protection and the completeness of the failure protection of the primary equipment, the soft strap remote control operation is prohibited. The method of the invention, based on real-time status information of a substation, can prevent potential safety hazards about main protection-free operation or failure protection-free operation of the primary equipment brought about by misoperation of a soft strap, and can also prevent potential safety hazards about incorrect action brought about by the misoperation of the soft strap, and can improve the operation accuracy of the soft strap and ensure safe and reliable operation of the smart substation.

The invention provides a differential current impedance protection method of a power transformer. The differential current impedance protection method comprises the following steps: measuring voltageand current of each side of the power transformer and forming differential current; calculating differential current impedance by applying the voltage of the side and the differential current througha power transformer protection device; forming a differential current impedance protection principle by applying differential current impedance characteristics. The differential current impedance protection principle can be used for sensitively and reliably reflecting short-circuit faults in the power transformer, especially inter-turn faults of windings; the principle can reliably ensure that incorrect actions are not caused under normal operation, external faults of the transformer and magnetizing inrush current; the method is very good for the sensitivity and reliability of protecting the power transformer. The differential current impedance protection method can be widely applied to computer type power transformer relay protection devices and provides a good technical scheme for relayprotection of the power transformer.