7results about How to "Implement fault detection" patented technology

The application provides an elevator rotating part fault detection method, an electronic device and a program product. The method comprises: obtaining to-be-detected vibration data of a to-be-detected elevator rotating part; performing frequency domain feature extraction on the preprocessed to-be-detected vibration data to obtain to-be-detected features; mapping the to-be-detected features from a target domain to mapping features of a source domain based on a pre-established cross-domain mapping relationship through a self-encoder model; inputting the mapping features into a trained classification model to obtain a detection result of the to-be-detected elevator rotating part, the classification model being trained through a first vibration data set of a source structure, and the first vibration data set comprising a fault data set and a non-fault data set of the source structure. In this way, the fault detection of the elevator rotating part can be realized without using the fault data of the elevator rotating part for model training, and the problems of false positives and false negatives caused by the lack of fault data of the elevator rotating part and the failure of the model to learn fault features are avoided.

The utility model discloses a portable multifunctional machine tool fault detection device, and relates to the technical field of machine tool maintenance. The device comprises a mounting plate, a detection assembly is arranged on the upper surface of the mounting plate, and a grip assembly is further arranged on the lower surface of the mounting plate; the detection assembly comprises a detection shell fixedly connected to the upper surface of the mounting plate. According to the utility model, the odor sensor and the visual camera in the detection shell are used for carrying out fault detection on the machine tool in various modes, and the driving rack drives the gas collecting hood to rotate in a reciprocating manner, so that air on the machine tool is guided into the detection shell through the gas collecting hood for detection; the problems that in the prior art, the function is single, and fault detection cannot be conveniently conducted on the interior of the machine tool are solved, meanwhile, the mounting plate and the detection structure are conveniently held through the holding rod, the position and angle of the detection structure are adjusted through the second lead screw, the second U-shaped frame and the third U-shaped frame, and the problem that in the prior art, carrying is not convenient is solved.

The application discloses a current probe for non-contact cable fault detection, two flange connectors are arranged on a ring-shaped shielding shell, a first flange connector is used as a current injection probe, and a second flange connector is used as a current detection probe, a core wire of the first flange connector is connected with one end of a copper band, the other end of the copper band is fixed in the first half-circular ring-shaped shielding shell after being wound around a first half-circular magnetic ring and a second half-circular magnetic ring once, one end of a wrapped wire of the second flange connector is connected with a core wire, and the other end of the wrapped wire is fixed in the second half-circular ring-shaped shielding shell after being wound around a third half-circular magnetic ring and a fourth half-circular magnetic ring eight times. The original connection of the contact type cable fault detection needs to be disconnected, and the technical problem that the cable is damaged twice.

The invention discloses a curing barn equipment detection device and a control method, the curing barn equipment detection device comprises central control equipment, the central control equipment is connected with an alternating current voltage regulation and measurement circuit and / or a direct current measurement circuit, the alternating current voltage regulation and measurement circuit is connected with alternating current equipment of curing barn equipment, and the central control equipment controls the alternating current voltage regulation and measurement circuit to input corresponding voltage to the alternating current equipment. The central control equipment detects the voltage and current of the alternating-current equipment through an alternating-current voltage regulation and measurement circuit and calculates the resistance of the alternating-current equipment to judge whether the alternating-current equipment has faults or not; the direct-current measuring circuit is connected with direct-current equipment of curing barn equipment, the central control equipment controls the direct-current measuring circuit to input corresponding voltage to the direct-current equipment, and the central control equipment detects voltage and current of the direct-current equipment through the direct-current measuring circuit and calculates resistance of the direct-current equipment to judge whether the direct-current equipment breaks down or not. Fault detection of various devices of the curing barn is achieved through the central control device, detection is more detailed, and device faults are easier to find.

The application discloses a resonant loop and a fault detection method thereof. The resonant loop comprises a driving module, a driving loop switch module, a synchronous detection module, a switching transistor, a resonant heating module and a control module. The control module is used for sending a control signal; the driving module or the driving loop switch module is used for sending a driving signal to drive the switching transistor to be in a conduction state according to the control signal; the synchronous detection module is used for detecting a resonant signal generated by the resonant loop and sending a synchronous signal; and the control module is further used for judging whether the resonant loop has a fault according to whether the synchronous signal is sent. In this way, the application can control the driving module or the driving loop switch module to send a driving signal to drive the switching transistor to be in a conduction state through the control module, and judge whether the resonant loop has a fault according to the synchronous signal sent by the synchronous detection module when detecting the resonant signal, so that the fault detection of the resonant loop is realized.

This application provides a fault detection method and apparatus for an aftertreatment system with an oxidation catalyst. By considering that the current engine state is energized, the current misfire fault state is triggered, the current catalyst inlet temperature is greater than or equal to a preset ignition temperature, and the current engine speed is greater than or equal to a preset speed, the accuracy of judging whether the aftertreatment system has malfunctioned based on the current oxidation catalyst conversion efficiency is improved. Ultimately, the fault of the aftertreatment system is determined at least based on the magnitude of the current oxidation catalyst conversion efficiency. The malfunction of the aftertreatment system is characterized by a decrease in the efficiency of the oxidation catalyst, thereby achieving the purpose of fault detection for an aftertreatment system with an oxidation catalyst, and thus solving the problem that existing solutions lack a fault detection method for an aftertreatment system with an oxidation catalyst.

The application discloses a power switch fault detection method and device, a charging device and storage medium, and relates to the technical field of switch fault detection. The method is applied to a charging device of an electric vehicle. The charging device comprises a power switch. The power switch is used for closing or shutting off according to a switch instruction, and is used for controlling the connection or disconnection of a power supply and the electric vehicle. The method comprises the following steps: obtaining a switch state of the power switch corresponding to a switch instruction before charging, a first voltage between a live wire and a zero line in the charging device, a second voltage between the live wire and a ground wire, and a third voltage between the zero line and the ground wire, wherein the switch state comprises a closed state and / or a shut-off state; and obtaining a fault detection result of the power switch according to the switch state, the first voltage, the second voltage and the third voltage. The application solves the technical problem of how to detect the relay fault of the charging device of the electric vehicle.