97results about How to "Easy to find faults" patented technology

The invention relates to a network frame loss processing method of a CAN (Controller Area Network) bus, in particular to a network frame loss processing method of the CAN bus aiming at the condition that a frame signal is lost when transmitted in a fixed cycle. The network frame loss processing method comprises a long loss processing method and a short loss processing method which can be decided by the state of a preset time threshold TN (Twisted Nematic). According to the invention, different processing methods can be selected according to different frame loss conditions, so that the CAN bus of an automobile engine has certain capabilities of fault tolerance and deviation rectification when transmitting and receiving the frame signal, the normal driving of the vehicle can be ensured and the safety for driving can be also improved.

The invention discloses a water turbine running state identification method, and relates to a water turbine running state identification method. An existing method is improved, and the accuracy of theidentification result is higher than that of a traditional method. The method comprises the steps of 1, performing empirical mode decomposition on a water turbine operation pulsation signal through adoption of a mirror image continuation method; 2, acquiring the magnitude and change trend of the impact force applied to the pressure measuring point during the operation of the water turbine by adopting a Hilbert-Huang transform algorithm of a cubic Hermite interpolation method; 3, analyzing the correlation between the working condition parameters of the water turbine and the pressure pulsationsignals; 4, training the water turbine pulsation signals through a three-layer wavelet neural network, and predicting the vibration trend of the water turbine; and 5, optimizing the probabilistic neural network by a fruit fly algorithm. The running state of the water turbine can be remotely monitored in real time, faults can be found conveniently, diagnosis and maintenance are conducted in time, the network prediction time is only 0.336372 s, running faults can be monitored in real time, and important guiding significance is achieved for practical engineering application.

The invention relates to a cable joint reinforcing device, and provides a cable joint reinforcing device with a simple structure, convenient installation and improved safety. The cable joint reinforcing device comprises a protective tube, an explosion-proof tube, a heat-shrinkable sealing cap, a reinforcing component and a pair of heat-shrinkable sheaths, wherein the explosion-proof tube is communicated with the protective tube and is arranged in the center of the protective tube, the heat-shrinkable sealing cap is sleeved at the tube opening of the explosion-proof tube, the reinforcing component is arranged on a cable and is located in the protective tube, the reinforcing component comprises a pair of symmetrically-arranged reinforcing groups, the pair of reinforcing groups are located on two sides of the explosion-proof tube, each reinforcing group comprises a plurality of baffle rings, and a spring is arranged between the adjacent baffle rings; the pair of heat-shrinkable sheaths are separately arranged at the tube openings at two ends of the protective tube, and the heat-shrinkable sheaths are separately sleeved on the protective tube and the cable. The cable joint reinforcing device disclosed by the invention is convenient to process and low in cost.

An infrared three-dimensional thermal imaging scanning system comprises an erect support. A lifter is disposed on the erect support. An annular support is connected to the lifter. A rotating ring is disposed on the annular support. A circumferential-direction drive mechanism is disposed between the rotating ring and the annular support. At least two infrared thermal imaging sensors are arranged on the rotating ring. Each optional infrared thermal imaging sensor is connected with a data acquisition device through a signal line. A temperature calibrator is disposed at the top of the erect support. Infrared transmitters are disposed on the rotating ring. The infrared three-dimensional thermal imaging scanning system has the advantages that at least two infrared thermal imaging sensors and infrared transmitters are disposed on the periphery of a to-be-scanned object serving as a central point, the lifter and the rotating ring are used to control the infrared thermal imaging sensors to move up and down and rotate on a plane, scanning of a to-be-scanned human body is achieved without movement of the human body, scanning accuracy and speed are increased greatly, and infrared thermal imaging sensors failed in updating can be discovered timely.

A novel-cable intermediate-joint explosion-proof apparatus is disclosed. By using the provided novel-cable intermediate-joint explosion-proof apparatus, the structure is simple, installation is convenient and safety is increased. The apparatus comprises a protection tube, an explosion-proof tube, a thermal shrinkage sealing cap, one pair of reinforcing assemblies and one pair of thermal shrinkage sheaths. The explosion-proof tube is connected to the protection tube and is arranged in a center of the protection tube. The thermal shrinkage sealing cap sleeves a pipe orifice of the explosion-proof tube. The pair of reinforcing assemblies is symmetrically arranged and is located at two end pipe orifices of the protection tube. The reinforcing assemblies are connected between a cable and the protection tube. The pair of thermal shrinkage sheaths is arranged on two end pipe orifices of the protection tube respectively. The thermal shrinkage sheaths successively sleeve the protection tube, the reinforcing assemblies and the cable. The apparatus is convenient to be processed and cost is low.