135results about How to "Accurate fault detection" patented technology

An apparatus and method for detecting faults and providing diagnostic information in a refrigeration system comprising a microprocessor, a means for inputting information to the microprocessor, a means for outputting information from the microprocessor, and five sensors.

An apparatus and method for detecting faults and providing diagnostic information in a refrigeration system comprising a microprocessor, a means for inputting information to the microprocessor, a means for outputting information from the microprocessor, and five sensors. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that this abstract will not be used to interpret or limit the scope or meaning of the claims.

A failure detection apparatus for a resolver outputting a sine signal indicative of sin θ and a cosine signal indicative of cos θ according to a rotational angle θ of a rotator, includes an inspection value calculating section configured to calculate an inspection value based on at least one of the sine signal and the cosine signal; a failure detecting section configured to judge whether the resolver is in a failure state or not on the basis of the inspection value; a counting section configured to gradually increase a count value with a lapse of time when the failure detecting section is determining that the resolver is in the failure state, and configured to gradually decrease the count value with a lapse of time when the failure detecting section is determining that the resolver is not in the failure state; and a failure deciding section configured to finally decide that the resolver has caused the failure on the basis of the count value.

A system for testing a memory page of a computer while an operating system is active. The system includes a hook function and a pattern generator. The hook function has software instructions that takes the place of a memory allocation / release scheme of the operating system. The system stores a test pattern generated by the pattern generator in the memory page upon receiving a request to release the memory page. Upon receiving a request to allocate the memory page, the system verifies the test pattern is correct to ensure the memory page is not defective. If the test pattern is incorrect, the defective memory page is removed from service.

An insulation resistance determining system (50) comprises an insulation resistance determining portion configured by connecting a coupling capacitor (52), a detection resistor (54), and a pulse oscillating circuit (56) in series with a common mode potential measuring point (30), and an insulation resistance determining portion having a filter (58) which processes an AC signal (vx) at a junction between the coupling capacitor (52) and the detection resistor (54), an amplifier (60), a wave-peak value detection circuit (62), and a controller (70). The controller (70) has functions for detecting a drop in insulation resistance in response to an output of the wave-peak value detection circuit (62); for requesting an HVCPU (40) to change the common mode potential so as to determine a failure of the insulation resistance determining portion; and for determining a failure of the insulation resistance determining portion from an output change of the wave-peak value determining circuit (62) between before and after the common mode potential change.

a mode change switch 3 which changes an automatic shift mode and a manual mode, an up-shift switch 4, and a down-shift switch 5 are provided. The mode change switch 3 outputs an output of the normal-open contact point P2 as a manual mode signal to a controller 1 in operating the manual change switch 3, while an output of the normal-closed contact point P4 is outputted to an input side of the up-shift switch 4 at non-operation thereof. The up-shift switch 4 and the down-shift switch 5 are provided with the normal-open contact points P12, P22 which output an up-shift signal commanding an up-shift or a down-shift signal commanding a down-shift in operating the switch, and the normal-closed contact points P14, P24 which output a monitor signal at non-operation thereof.

The method includes steps: S102, connecting ports of signaling flow sub card (SFSC) and media flow sub card (MFSC) in board to be tested to backboard; S104, making loop for each port of SFSC and each port of MFSC; S106, through port located between SFSC and CPU and port located between MFSC and CPU, CPU sends out data packets (DP) as well as receives DP from the port, which sends out DP; S108, carrying out comparison between number of DP sent from the port, which sends out DP, and number of received DP of containing same port label; if the sent number is identical to received number, then the method determines that port of board to be determined works normally; otherwise, there is fault in the port of board to be determined. Implementing fault detection for quick switching chip in high efficiency and low cost, the invention can detect fault port in a switching chip precisely. The invention is suitable to fault detection for batch product of a switching chip especially.

The invention discloses a bearing fault detection method and device. The method comprises that a vibration signal of a bearing is obtained, and preprocessed to obtain a vibration sequential signal to be processed; the vibration sequential signal to be processed is input to a pre-trained fault classification model to obtain a fault classification result of the bearing vibration signal; and the type of highest probability among all the classification results is the detected fault type, and bearing fault detection is completed. According to the method, vibration signal values sampled continuously according to the time sequence is used as a training sample for convolutional neural network directly, a signal feature extraction step in traditional fault recognition is not needed, influence of feature extraction on accuracy of a fault identification result is reduced, parameter training is carried out the whole network in a monitored way by combining labels, and thus, accurate bearing fault detection is realized.

The invention relates to the field of power monitoring, in particular to an ultrahigh-tension line fault detection and location method and a fault detection and location device. The method comprises the following steps: sampling the current phase information at the two ends of a high-tension line to be detected at the same time respectively to obtain phi1 and phi2; calculating difference between phi1 and phi2 to obtain the difference psi=phi1-phi2; setting an alarm value, wherein when psi is greater than the alarm value, the high-tension line to be detected has fault; and after judging that the high-tension line to be detected has fault, sending fault information to the outside. The fault detection and location device comprises a fault detection module, a fault analysis module and a fault signal output module, wherein the fault detection module comprises a local end measurer as well as an opposite end measurer; the local end measurer and the opposite end measurer are connected to the fault analysis module respectively; and the fault analysis module is connected with the fault signal output module. According to the invention, the fault detection for the high-tension line is simple, accurate, quick and the like, the workload of line searching can be effectively reduced, and the fault repairing time can be shortened.

The invention discloses an energy-saving operation control device of an air conditioner and a control method thereof. The control method is characterized in that an air conditioner energy-saving operation control model or program using the operation running action, the indoor environment temperature and humidity, the electricity consumption and the operation time of the air conditioner as the basis is arranged in an intelligent controller, and the intelligent controller is used for carrying out the energy-saving operation control on the air conditioner. The control device comprises a remote control signal receiving and emitting circuit, a power consumption detection circuit and the intelligent controller and an environment temperature and humidity detection circuit, wherein the remote control signal receiving circuit and the environment temperature and humidity detection circuit are respectively connected with the corresponding input end of the intelligent controller. The intelligent energy-saving operation control device of the air conditioner and control method thereof have the advantages that the work condition or the fault of the air conditioner can be judged, in addition, the air conditioner can operate in an energy-saving state, the formation of a control system is simple, the implantation is easy, and practicality and validity are realized.

A directional indicator system includes a directional indicator that includes a plurality of LED series circuits each connected in parallel to another of the LED series circuits. Each LED series circuit includes LEDs connected in series. A driver is configured to control driving of the directional indicator. The driver includes LED drivers that are each configured to drive a corresponding one of the LED series circuits. The driver also includes a plurality of current detectors that are each configured to measure a value of a current in a corresponding one of the LED series circuits.

A power steering apparatus has a steering power assisting system coupled to tire wheels and a variable gear transfer system coupled to a steering wheel. The steering power assisting system includes a torsion bar rotation sensor and a first actuator rotation sensor to calculate a first pinion angle and a second pinion angle based on the detected rotation angles, respectively. The variable gear transfer system includes a steering sensor and a second actuator rotation sensor to calculate a third pinion angle based on the detected rotation angles. Sensor failure is detected by comparing the calculated first, second and third pinion angles.

In this apparatus, maintaining control (time t1 to t2) which instructs fixing of the open timing VVT of an intake valve is executed in a predetermined low load state. Subsequently, there are executed changing control which instructs changing of the open timing VVT by a predetermined amount (time t2), and maintaining control which again instructs fixing of the open timing VVT of the intake valve (time t2 to t3). An intake-valve control apparatus is determined to be “anomalous” when an change amount Δave (=ave2−ave1) between the average ave1 of a large number of sample values of ΔMFBβ (combustion percentage increase amount within a predetermined crank angle range in an expansion stroke) during the maintaining control before execution of the changing control and the average ave2 of a large number of sample values of ΔMFBβ during the maintaining control after execution of the changing control is less than a predetermined value C.

The invention discloses an electric equipment fault detection method and device. The method is characterized by recording a start time point of electric equipment entering a work state, recording cumulated time after the start time point and recording continuous working time of the electric equipment working continuously after the start time point; and when the cumulated time is not larger than a preset period time and the continuous working time is larger than preset time, giving a prompt message for reminding that the electric equipment has fault. When fault detection is carried out through the electric equipment fault detection method and device, fault detection of the electrical equipment is carried out through a mode of judging whether the continuous working time of the electric equipment in the preset period time surpasses the preset time instead of an original mode of judging whether electrical parameters vulnerable to external interference are normal; if the electric equipment has fault, the fault reminding is given; and since the continuous working time is not easy to be affected by the outside world, fault detection can be carried out accurately based on the continuous working time and the preset time, and detection accuracy is improved.