43results about How to "Facilitate fault diagnosis" patented technology

The invention relates to a transmitter fault diagnosis circuit and a method thereof. The fault diagnosis circuit comprises a sensor, a signal processing module, a standard signal input module, and a change over switch. The change over switch connects with the sensor and the signal processing module, and connects with the standard signal input module and the signal processing module simultaneously. According to the invention, a standard signal is inputted to the signal processing module through the standard signal input module, and connection between the sensor and the signal processing module or connection between the standard signal input unit and the signal processing module is switched through the change over switch. When a fault appears, the change over switch disconnects the connection between the sensor and the signal processing module, and connects the standard signal input module with the signal processing module, the standard signal is inputted to the signal processing module through the standard signal input module, according to the standard signal, the signal processing module carries out processing, followed by outputting, if an output result is normal, the sensor has a fault. Conversely, the signal processing module has a fault. The transmitter fault diagnosis circuit has the characteristics of simple structure, low cost and convenient maintenance.

The invention discloses a modularized detection and control meter comprehensive practical training device. The device comprises a practical training operating platform and connecting wires, and is characterized by also comprising more than one practical training unit, wherein every practical training unit comprises a plurality of practical training elements; the practical training elements are arranged in iron boxes of a standard size so as to form independent modules; and the modules are arranged in corresponding installation frames on the panel of the practical training operating platform and are connected with one another by plugging wires and terminal strip wires. The modularized detection and control meter comprehensive practical training device can be freely combined, and can comprehensively and systematically perform the experiments of detection and control meters, the practical training and the skill training on students. By using the flexible combination and the variety of practical training contents, the creative thinking of the students is cultivated, conditions are created for strengthening the practical ability of the students, and the modularized detection and control meter comprehensive practical training device has high innovativeness and is used for novel automatic meter and control systems.

The invention discloses a high-temperature alarm method for a refrigerator. The high-temperature alarm method for the refrigerator comprises the steps that the temperature inside a refrigerator body of the refrigerator is detected, and the electrification time of the refrigerator is recorded; if the temperature in the refrigerator body is greater than a preset temperature threshold value, the abnormal high-temperature type is determined according to the electrification time; an alarm mode is determined according to the abnormal high-temperature type; and an high-temperature alarm is given according to the determined alarm mode. According to the high-temperature alarm method for the refrigerator, a high-temperature alarm can be given, the cause of the high-temperature alarm can be prompted, a user can conveniently take the next measures, and fault analysis and maintenance can be facilitated. The invention further discloses a high-temperature alarm device for the refrigerator and the refrigerator with the high-temperature alarm device for the refrigerator.

The invention discloses a real-time monitoring device and method for power transmission line phase-to-phase spacer waving tension. The system comprises a data collection front unit, a phase-to-phase spacer device, a communication converting unit and an industrial personal computer; the data collection front unit comprises a first tension sensor, a second tension sensor and a control module, the first tension sensor is connected with a phase-to-phase spacer of the power transmission line phase A-phase B, the second tension sensor is connected with a phase-to-phase spacer of the power transmission line phase B-phase C, the control module is connected with the first tension sensor and the second tension sensor separately, and signals are sent to the communication converting unit in a wireless communication mode; the communication converting unit transmits the received data to the industrial control computer. The stress phenomenon of the phase-to-phase spacers is obtained in time, electric workers can conveniently improve the design and layout of the phase-to-phase spacers according to the phase-to-phase spacer waving stress phenomenon, the reliability and effectiveness are improved, and finally the phase-to-phase spacer anti-waving effect is improved.

The invention discloses a bidirectional remote control system and a method for mining. The system comprises a remote control transmitter for mining and a bidirectional receiver for mining; The remote control transmitter for mining comprises a first core processor, a first power supply, an input unit, a first display unit, a first radio communication circuit and a first data recording circuit; the bidirectional receiver for mining comprises a second core processor, a second power supply, a second radio communication circuit, a second data recording circuit, a CAN interface circuit, an isolation circuit and a CAN external interface circuit; the second core processor is connected to the second power supply, the radio communication circuit, the second data recording circuit and the CAN interface circuit. According to the bidirectional remote control system and the method for mining of the invention, personnel operating the machinery for mining can realize remote control on the machinery to be controlled with a distance from the machinery. During the operation, changes of parameters of state of three concerned controlled machineries can be observed to ensure safe working of high gas mine.

The invention belongs to a distributed Raman optical fiber sensing system, and discloses an intelligent power grid-oriented distributed optical fiber Raman sensing system and detection method considering long sensing distance and high spatial resolution. The system comprises a pulse laser, a wavelength division multiplexer, a sensing optical fiber, a first photoelectric detector, a second photoelectric detector and a data acquisition system, pulse laser output by the pulse laser passes through the wavelength division multiplexer and then enters the sensing optical fiber, Stokes light and anti-Stokes light reflected in the sensor pass through the wavelength division multiplexer, are detected by the first photoelectric detector and the second photoelectric detector and then are sent to the data acquisition system, one part of the sensing optical fiber is arranged in the thermostatic bath, the other part of the sensing optical fiber is arranged in the second photoelectric detector, and the thermostatic bath is used for carrying out thermostatic control on the sensing optical fiber in the thermostatic bath; and the data acquisition system is used for performing data acquisition and demodulation to obtain distributed temperature field information along the sensing optical fiber. The method improves the resolution and measurement precision of the system, and can be applied to the field of intelligent power grid detection.

The invention discloses a heating loop fault judging method. A heating loop is provided with a circulating pump, and the method is characterized in that the heating loop is provided with a differential pressure device at the water outlet end of the circulating pump, the differential pressure device is provided with a water inlet port, a water outlet port and a tapered section located in the middle, the caliber of the tapered section is gradually reduced from the water inlet port to the water outlet port, a pressure sensor is arranged on the differential pressure device, the signal output end of the pressure sensor is connected with a controller, and the controller determines a fault according to the differential pressure value. The differential pressure device is used for judging the flowcondition of the heating water path, whether the heating circulation pump is normally operated or not can be known, whether air in the waterway is too large or not can be judged, or whether the waterpath is blocked or not can be judged, and great convenience is brought to subsequent fault judgment and maintenance.

The invention relates to the field of air conditioners, and discloses a method for detecting blockage of an air conditioning system, so that blockage detection of the air conditioning system does notdepend on the temperature of an evaporator or condenser coil. The method comprises the following steps of collecting and storing the environment temperature of the outer side of an outdoor unit, the opening degree of an electronic expansion valve, the frequency of a compressor and the temperature of a compressor winding in real time, and meanwhile, calculating a change rate deltaT1 of the environment temperature of the outer side of the outdoor unit within n seconds, a change rate deltaV of the opening degree of the electronic expansion valve within n seconds, a change rate deltaF of the frequency of the compressor within n seconds and a change rate deltaT2 of the temperature of the compressor winding within n seconds; and when deltaT1 is smaller than a first temperature change rate threshold Th1, deltaV is equal to 0 and deltaF is equal to 0, comparing the relation between deltaT2 and the second temperature change rate threshold Th2, and judging whether the air conditioning system isblocked or not according to a comparison result. The method is suitable for detecting the blockage of the air conditioner.

The invention discloses an integrated cooker fault diagnosis system. The integrated cooker fault diagnosis system comprises an integrated cooker power panel installed in an integrated cooker cabinet body; a power input interface of the integrated cooker power panel is electrically connected with a positive pole N and a negative pole L of an external power source, and power output pins of the integrated cooker power panel are electrically connected with an electrode of a fan R6; power output pins of the integrated cooker power panel are electrically connected with pins of a temperature sensor T1 and pins of a temperature sensor T2; power output pins of the integrated cooker power panel are electrically connected with pins of a display screen R8; power output pins of the integrated cooker power panel are electrically connected with pins of an igniter R7; and a fault diagnosis optocoupler module M1 is arranged on the integrated cooker power panel and used for detecting whether load circuits can be normally connected and disconnected or not and transmitting abnormal signals to the display screen R8 to the displayed. According to the integrated cooker fault diagnosis system, the load circuits are diagnosed, and fault diagnosis results are displayed for reminding.

The invention discloses a laser-perforated hollow filter tip detection device and method, and belongs to the technical field of cigarette production and manufacturing. A point light source is used for lighting the end face of a filter tip, the point light source directly irradiates the end of the hollow filter tip, the background contrast of a laser hole and the filter tip is improved, the laser perforation detection accuracy is improved, the upper end face and the lower end face of the filter tip are subjected to lighting through the point light source, the hollow defect of the filter tip is detected, the detection result is combined with the laser hole detection result, the defect type of the cigarette is accurately judged, the number of the defective cigarettes of the laser-perforated hollow filter tip is accurately counted, and fault judgment on filter tip production equipment is facilitated.

The invention discloses a wireless sensor. The wireless sensor comprises a sensing module, a wireless module (2), a core processing circuit (4), a power supply management circuit and a wireless modulestarting control circuit. The overall reliability of the wireless sensor is effectively improved.