83results about How to "Judging the working status" patented technology

The invention discloses a control device and method for a wind/solar/water complementary power generation system, belonging to the technical field of renewable energy utilization. The control device disclosed by the invention comprises a wind power generation equipment control circuit, a micro-hydroelectric power generation equipment control circuit, a solar power generation equipment control circuit, a voltage/current detection circuit, a voltage frequency measurement circuit, a relay driving circuit, an MOSFET (metal-oxide semiconductor field effect transistor) driving circuit, a voltage stabilizing circuit, a single chip for storing programs and a peripheral circuit of the single chip. The method estimates the remaining electric quantity of a storage battery according to the working voltage and current of the storage battery, judges the working state of the system according to the remaining electric quantity and the working current of the storage battery, and controls the power generation capacity of the power generation equipment according to the working state of the system; and particularly when the storage battery is full, the power generation equipment and the storage battery are not cut off, and the power generation equipment is controlled to supply power to a load independently, thus the renewable energy can be more sufficiently used. Through the invention, the remaining use time of the electric quantity of the system is displayed in real time so that a user can reasonably distribute the electricity consumption; and by using a pluggable wireless communication circuit, remote monitoring on the system can be flexibly realized.

The invention relates to a method for online monitoring work state of an on-load tap-changer and early warning. The method comprises the following steps: 1. real-time acquiring voltages and current parameters of a branch element of a transition contact of the on-load tap-changer; 2. based on the acquired voltages and current parameters, computing the following parameters: a transition resistance, a transition time, a transition waveform, a three phase synchronization, a contact resistance, an action program; 3. determining the state of a device and communicating with the outside by using a communication module through the on-load tap-changer main body, implementing real-time monitoring whether the on-load tap-changer is working normally so as to send an alarm in time and turn off the device for maintenance, and establishing an early warning mechanism. According to the invention, the method implements online monitoring of OLTC work state, acquires OLTC real-time device parameters, and determines whether OLTC works normally so as to turn off the device for maintenance, prevents occurrence of accidents, and lowers property loss. At the same time, the method conducts analysis and computing on historical data, establishes the early warning mechanism prior to events, and exits an operation state in advance.

The invention relates to an on-line monitoring system and method of engine test data. The on-line monitoring system of the engine test data comprises a data acquisition system and a data display system, wherein the data acquisition system comprises a clock control unit, a data acquisition unit, a data display unit and a data storage unit, the clock control unit is used for providing a time criterion for the data acquisition unit, the data display unit and the data storage unit, the data acquisition unit is used for acquiring the test data of an engine and sending the test data to the data display unit and the data storage unit in real time, the data display unit is used for displaying the received test data in real time, the data display system comprises a data analyzing unit, a curve plotting unit and a display unit, and the data storage unit is used for storing the received test data in real time and transmitting the received test data to the data analyzing unit. The on-line monitoring system and method of the engine test data have the advantages that the problem that errors exist in plotting of an existing engine test curve is solved, real-time plotting of the engine test data curve is achieved, and the engine curve can be accurately plotted in real time.

The invention relates to an engine turbocharger overspeed diagnosis method and system, and a vehicle. The engine turbocharger overspeed diagnosis method comprises the steps that a first threshold anda second threshold are set; operation parameters of an engine are obtained; obtained boost pressure and the obtained engine air flow are corrected into the boost pressure ratio and the air compressorflow under the standard atmosphere pressure and temperature condition correspondingly, then according to the corrected boost pressure ratio and the corrected air compressor flow, a performance pulse spectrogram of an air compressor of a turbocharger is inquired to obtain the predicted rotating speed of the turbocharger; according to the rotating speed of an engine and the opening degree of a throttle valve, a position pulse spectrogram of an air release valve actuator of the turbocharger is inquired to obtain the predicted opening degree of an air release valve, and the different value betweenthe predicted opening degree and the obtained opening degree of the air release valve of the turbocharger is calculated; and if the predicted rotating speed exceeds the first threshold, or the difference value exceeds the second threshold, it is judged that the turbocharger is subjected to overspeed, and if the predicted rotating speed does not exceeds the first threshold and the difference valuedoes not exceed the second threshold, it is judged that the turbocharger is not subjected to overspeed.

The invention provides a shore bridge prediction method based on a BP neural network. The method is characterized by comprising the steps of collecting data by an acceleration sensor and a strain sensor on a shore bridge, determining a load clustering center of collected vibration data by using a K-means method, classifying the data of a cluster center point, and analyzing collected shore bridge state data by using a BP neural network algorithm and predicting data of a future state to achieve the purpose of shore bridge state prediction. The state of the shore bridge is analyzed through the data, and a conclusion that whether the shore bridge needs maintenance or repair in a period of time is obtained. According to the method provided by the invention, the actual engineering data of the shore bridge is analyzed, on the above basis, the data of the future operation state of the shore bridge is predicted by using the BP neural network algorithm, and a prediction result is accurate and reliable.

The invention discloses a double-lamp indicating solid-state relay, which comprises a control signal input module, an input indication module, an optocoupler triggering control circuit and an output indication module, wherein the optocoupler triggering control circuit and the output indication module are connected with a load circuit; the load circuit comprises a load power supply, a load and two parallelly connected diodes; one diode is directly connected with the optocoupler triggering control circuit; and the output indication module is arranged between the other diode and the optocoupler triggering control circuit. The double-lamp indicating solid-state relay has a simple structure; by the double-lamp indicating solid-state relay, the operating state of a product can be clearly judged; and in addition, due to a resistance-capacitance (RC) absorption protection circuit and the photoelectric isolation of input and output, a circuit can safely and reliably work, and can be switched on/off for hundreds of millions of times, and zero-current switching-off and non-contact switching-on/off can be realized.

The invention provides a detection control device and method for an ejector, belongs to the technical field of fuel cell control, and solves the problem that potential faults of the ejector under a cold start working condition cannot be identified in the prior art. The device comprises an electric pile, a hydrogen source, a hydrogen ejector I, a hydrogen ejector II, an ejector to be tested, hydrogen recovery equipment and a controller. One output path of the hydrogen source is transmitted to a hydrogen inlet of the galvanic pile through a hydrogen ejector II, and the other output path of the hydrogen source is transmitted to the hydrogen inlet of the galvanic pile from a nozzle inlet of the ejector to be tested through a hydrogen ejector I; and hydrogen discharged by the electric pile is fed back to a drainage gas inlet of the ejector to be tested through the hydrogen recovery equipment. After the controller receives an ejector detection instruction, the hydrogen ejector I is started, the difference value of the pressure of hydrogen entering and exiting the reactor is obtained, whether the ejector to be tested works normally or not is judged, and if the ejector to be tested works abnormally, the hydrogen ejector II is started, the temperature of the ejector is increased, and judgment is conducted again till the ejector to be tested works normally. The cold start success rate of the fuel cell is improved.

The invention relates to a linear voltage-stabilizing device. The linear voltage-stabilizing device comprises a battery, a linear voltage regulator and reference voltage sources, all of which are connected in order. The device further comprises a degenerate state detection circuit connected with the linear voltage regulator and the reference voltage sources. The linear voltage regulator is used for providing power sources to the reference voltage sources. The reference voltage sources are used for providing reference voltage sources required by the linear voltage regulator. The degenerate state detection circuit is used for detecting working states of the reference voltage sources and controlling the working states of the linear voltage regulator. The working states of the reference voltage sources comprise a degenerate state and a normal state. The linear voltage-stabilizing device has following beneficial effects: the technical scheme helps decrease the area and power consumption of a chip; process floating and deviation caused by the distance, the direction and other non-ideal factors for the two reference voltage sources are effectively reduced, thereby avoiding performance reduction of deviation-induced other circuits.

The invention belongs to the technical field of avionics, and particularly relates to a maintenance-free aviation recorder and a method for detecting states. The maintenance-free aviation recorder comprises a power module [1], a data management module [2] and a storage module [3]. Power can be supplied to the data management module [2] by the power module [1], and the data management module [2] comprises a data receiving functional slave module [201], a data comparison functional slave module [202], a data read-back comparison result reporting functional slave module [203], a data processing functional slave module [204] and a data recording interface functional slave module [205]. The method which is a maintenance-free method for the aviation recorder includes storing data received by the recorder in the storage module [3] protected by protective shells; reading back data and comparing the data to the received data; reporting comparison results to a flight parameter acquisition unit [4]. The comparison results are used as state words. The maintenance-free aviation recorder and the method have the advantages that the ground maintenance time of aircrafts can be effectively shortened, and accordingly the maintenance-free aviation recorder and the method have excellent economic benefits.

The invention discloses a method for detecting bowing defects of a pantograph. The method comprises the following steps: S1) inputting information: inputting type information and standard parameter information of the corresponding type of the pantograph into a database; S2) acquiring an image: acquiring the image information of the detected pantograph, comparing with the type information of the pantograph in the step S1) and judging and acquiring the type information of the detected pantograph; S3) identifying an arc planar angle: identifying the image information of the detected pantograph inthe step S2), acquiring a value of an inclined angle between an arc plane of the pantograph and a horizontal plane and comparing with the standard parameter information of the pantograph. The methoddisclosed by the invention is reasonable in design and high in practicability; according to the method, the bowing defects of the pantograph can be quickly detected; a detecting flow can be timely stopped and a detecting result can be sent to a maintenance platform when the bowing defects are detected; the maintenance platform can timely maintain the pantograph, so that the maintaining efficiencyof the pantograph can be increased.

The invention relates to an analyzing device, in particular to a Zigbee protocol analyzing device. The Zigbee protocol analyzing device comprises a radio-frequency transceiver module, a main controller module, a PC (personal computer) and a function indication module, wherein the radio-frequency transceiver module, the function indication module and the PC are connected with the main controller module respectively. The main controller module converts Zigbee signals sent by the radio-frequency transceiver module into frame signals in a USB format and then sends the signals to the PC; the main controller module judges the running state of a wireless sensing network; and the function indication module indicates the working state of the wireless sensing network. The Zigbee protocol analyzing device provides specific data support for reliability and stability of a network system, detects and analyzes the wireless sensing network constituted by Zigbee, and judges the working states of a network node, a router and a coordinator.

The invention relates to the technical field of data acquisition and analysis of a series compensation device and discloses a non-contact information acquisition health discrimination system of a series compensation device. The system comprises a noise sensor for monitoring working sounds of a series compensation device, a curent sensor for monitoring the current of a secondary circuit, a displacement sensor for monitoring the displacement changes of a circuit breaker and an isolating switch operating rod, and a thermal imaging module for monitoring the spectrum of the series compensation device. A DC signal isolator converts all measured signals into 0-5V voltages and the voltages are accessed to a single-chip microcomputer for analysis to determine the health state of the series compensation device and display the state. Meanwhile, the invention further discloses a method for judging the health state of the series compensation device, namely, the sensor is used for monitoring relateddata parameter changes of the series compensation device in real time, and the related data parameter changes are analyzed and processed by the single-chip microcomputer. According to the invention,the series compensation device and the secondary circuit control element thereof can be monitored in real time from multiple angles by adopting multiple means, and whether the working state of the series compensation device is normal or not is analyzed and judged.