72results about How to "Solve malfunction" patented technology

The sensor is a pair of planar electrodes in some interval formed on the inner surface of automobile glass via adhering, pressing, painting or plating conductor, and electrode pair constitutes one planar capacitor via glass and near dielectric space. When some rain drops or other foreign matter attach to the outer surface of the glass, there will be changes in the average dielectric constant, the area covered by the planar capacitor plates and the minor axis radius of the dielectric space and thus change in capacitance, and the intelligent adaptive signal amplifying and processing unit with microprocessor detects the change in capacitance and converts it into digital signal to drive the control unit of the automatic windscreen wiper system.

The invention discloses a mine locomotive monitoring system under the multilayer heterogeneous industrial control network convergence technology, which comprises an intrinsically safe power module, a gateway module and a dynamic annunciator module, a vehicle-mounted annunciator module, a point switch module and an axle counter module respectively communicated with the gateway module. The mine locomotive monitoring system is convenient and fast to install and low in cost and reliable in operation. The mine locomotive monitoring system is a multilayer network mine locomotive transportation monitoring system controlled through overall coordination, and can meet the development requirements on the digital mine industry.

The invention relates to a sampling point differential protection misoperation prevention method, belonging to the technical field of relay protection of power systems. The method comprises the following steps of: firstly, performing difference calculation to differential current and brake current sampling points, and judging whether the differenced differential current and brake current sampling values meet a rate brake condition, wherein influence of unsaturated CT attenuation direct current component on the synthesized differential current may be weakened through a difference algorithm; and judging whether a criterion for opening sampling point differential protection is satisfied according to ratio of the sampling values of the differenced differential current and brake current. The method solves a problem of misoperation of sampling point differential protection caused by too fast attenuation of the direct component when external fault single CT is saturated and unsaturated CT current contains large direct current component and flows through a low current converter of a protection device. Meanwhile, by the method, sampling point differential protection causes no misoperation when waveform is abnormal, and causes reliable operation when normal failure happens, thus, reliability of sampling point differential protection is improved.

The invention provides a method for solving false action of differential protection when power transfer of a transformer, comprising the following three steps: firstly, adopting a criterion of self-adaptively improving a definite value functionally, wherein an action value is set according to 1.2 times of rated value In; secondly, adding a time delay link of hiding unbalanced current in a low-current action region logically, wherein the setting time is 10ms; and thirdly, adding three times of harmonic blocking function characteristically, wherein the coefficient of braking is 0.1. The problem that false action of differential protection is carried out when power transfer of the transformer can be solved as long as the three steps play a role together. Computational results show that the original characteristics of differential protection are not influenced after the steps are adopted, and the problem of false action under special conditions is solved thoroughly. Therefore, the faults of power unit trip, large area equipment power failure and the like caused by differential protection are prevented, and the method plays an important role for ensuring normal running of electric fence.

The invention discloses a vehicle-mounted mobile radiation safety inspection system which comprises a radiation source, a scanning arm and a detector. The system further comprises a geomagnetic switch which is arranged at an entrance from which a detected object comes into a scanning channel, a first light curtain switch which is arranged at the entrance of the scanning channel and is used for detecting whether the detected object enters and leaves the scanning channel, and a main beam detection switch which is arranged at a main beam position in the downstream direction of the scanning channel and is used for detecting whether the detected object reaches the main beam position. When the geomagnetic switch, the first light curtain switch and the main beam detection switch are triggered in turn, the radiation source is started to prepare a beam outgoing operation. In addition, the invention further relates to a control method of the vehicle-mounted mobile radiation safety inspection system.

The invention relates to a wave correlation based current protection method for power collecting lines in a wind farm. The method comprises the following steps: firstly, three-phase current in protective mounting position of each power collecting line in the wind farm is collected; filtering is performed, and fault component current of each phase is extracted by programming; correlation coefficients of the phases between the power collecting lines is calculated according to the fault component current, and the correlation coefficients are traversed pairwise; if the correlation coefficient of one phase belongs to (0, 1], the phase of the two power collecting lines has no fault, and the two power collecting lines are written as line i and line j; if the correlation coefficient of the one phase does not belong to (0,1], the phase of one and only one of the two power collecting lines has a fault, and the two power collecting lines are written as line u and line v; at the moment, when the correlation coefficient of the phase between the line u and the line j belongs to (0,1], the phase of the power collecting line u has no fault, while the phase of the power collecting line v has a fault; when the correlation coefficient of the phase between the line u and the line j does not belong to (0,1], the phase of the power collecting line u has a fault, while the phase of the power collecting line v has no fault.

The invention belongs to the technical field of power system relay protection and especially relates to a T line protection scheme fit for distributed electrical connection. The T line protection scheme is characterized in that a distance protection starting element acts after the fault occurs; if the inaction condition for main criterion is not met, the trip protection is performed through zero sequence voltage amplitude difference, and if not, the distance section-II protection can be used for judging the fault direction; if section-II measuring elements at three ends are judged as positive direction fault and the acting condition of auxiliary criterion section-I protection is met, the trip protection is performed through the distance section-I protection at three ends; if the acting condition of auxiliary criterion section-I protection is not met, the section-II protection at three ends is delayed and then is tripped out; if two section-II measuring elements judge as positive direction fault and one section-II measuring element judges as negative direction fault, a locking signal is sent to section-I protection at the opposite end by the negative direction fault end and the section-I protection at three ends all shall not trip out. According to the T line protection scheme fit for distributed electrical connection, the active criterion and the auxiliary criterion are organically matched and formed into a comprehensive criterion, so that the selectivity, sensitivity and reliability of the T line protection can be ensured.

The invention discloses a multi-layer data source service registration and access mechanism developed by the application of an industrial process measurement and control network. The overall network adopts a two-layer network topology structure combining star and Mesh, a centralized and distributed multi-layer network system management mode, and a unique data source service registration process based on a node backup unit, thereby avoiding the phenomenon of failure in grid connection since nodes are busy in data transmission. During access to data source services, uplink and downlink modes ofa data source based on the information frame class are adopted. Firstly, a primary route is deployed uniformly, and a latter cluster can be connected flexibly with the grid by only one primary route.The method improves the measurement and control of sub-nodes in traditional industrial equipment control, and it is based on a high reliability communication technology for radio frequency environmentrecognition and adaptive frequency hopping. Through a gradient control local expansion change routing protocol, a maximum freedom encryption/decryption principle, a special network-level registrationand access mechanism including a physical layer, frame relay and a network layer, and a special data encryption way, the reliable transmission of equipment node data in a harsh environment is ensuredin order to sufficiently adapt to field equipment control and maintenance of industrial wireless Internet of things.

An electronic device is provided. The electronic device includes a microphone, a display, a memory, and a processor electrically connected to the microphone, the display, and the memory. The processor is configured to execute a speech recognition function, to obtain a first utterance from a user through the microphone, to display a text generated based on the first utterance, in the display, and to display at least one item, which corresponds to a portion recognized as a proper noun in the text and which is determined based on the first utterance and a personalized database of the user, in the display.

The invention discloses a longitudinal zero-sequence protection method of a voltage-compensated power transmission line, and solves the problem of low zero-sequence protection sensitivity during a high-resistance grounding fault in a protection region. The longitudinal zero-sequence protection method comprises the following steps of inputting zero-sequence voltage compensation (a product of a zero-sequence current and half impedance of the whole line of the power transmission line) when a phase included angle Theta<2> between a voltage phase and a current phase of a negative sequence of one end conforms that Theta<2> is larger than 175 degrees but smaller than 325 degrees; judging whether an internal fault or an external fault occurs when the compensated zero-sequence voltage amplitude 3U<0>' is larger than 0.5V and a phase included angle Theta<0>' between the zero-sequence voltage phase and the zero-sequence current phase after compensation conforms that Theta<0>' is larger than 175 degrees but smaller than 325 degrees; and sending out an allowable trip signal to an opposite end of the power transmission line, sending out a trip command to a fuse at an end and simultaneously sending out the allowable trip signal to the opposite end when opposite end protection conforms to the abovementioned condition, so that the fuse at the end can be switched off by the fuses at the two ends when the internal fault occurs. By the longitudinal zero-sequence protection method, the problems of false action of a protection device during alternative internal fault and external fault and excessively low zero-sequence voltage due to high-resistance grounding to cause that longitudinal zero-sequence protection cannot be started are solved.

The invention discloses a system and a method for automatically detecting and correcting animal behaviors and relates to the technical field of animal behavior correction. The system for automaticallydetecting and correcting animal behaviors comprises a sound signal acquisition module and a micro control unit, wherein the output end of the sound signal acquisition module is electrically connectedwith the input end of a sound signal processing module; the micro control unit is in bidirectional electric connection with the sound signal processing module, a movement signal processing module anda pulse signal processing module; and the output end of the micro control unit is electrically connected with the input end of an action execution correction module. Due to the adoption of the soundsignal acquisition module, the sound signal processing module, the movement signal acquisition module, the movement signal processing module, a pulse signal acquisition module, the pulse signal processing module and the micro control unit, the problem that a common manual control dog training instrument and an automatic control bark stopping instrument in the market are capable of causing mal-actions and are poor in sensitivity because of artificial control and inaccurate judgment can be solved.

The invention relates to the technical field of relay control, in particular to a serial control interface circuit for multiple relays, which comprises at least one serial-to-parallel chip, a data latch chip and a relay driving chip, wherein the serial-to-parallel chip is used for converting a serial control signal on a control data line into a parallel control signal, and the multiple serial-to-parallel chips are cascaded; the data latch chip is used for latching the parallel control signal outputted by the serial-to-parallel chip; and the relay driving chip is configured to receive the parallel control signal latched and outputted by the data latch chip to independently control one or more relays. The problems that the existing large amount of relay control occupies a large number of processor IOs, the reliability is low and the cost is high can be solved.

The invention relates to a return oil detection method of a hydraulic type natural gas vehicle gas-filling substation and belongs to the technical field of return oil detection technology of the gas-filling substation, and the hydraulic type natural gas vehicle gas-filling substation comprises a high pressure flowmeter, a substation trailer, a hydraulic oil tank, a substation prying body, a main hydraulic oil pump, a hydraulic oil pump motor, a PLC control cabinet, a variable frequency control cabinet and a wind source device; the average flow of hydraulic oil and the average flow of natural gas in a pipeline are obtained by experiments, then output signals of the high pressure flowmeter are sent to a CPU of a PLC for processing, and whether the substance that flows through an oil return pipeline is the hydraulic oil or the natural gas is judged by the PLC by detecting the size of an instant flow signal that flows through the high pressure flowmeter when the hydraulic type natural gas vehicle gas-filling substation returns oil. The method has the advantages of judging the medium type in the oil return pipeline according to an instant flow value of the high pressure flowmeter on the oil return pipeline of the hydraulic type natural gas vehicle gas-filling substation and solving the problems of false operations and low security.

The invention discloses a power supply circuit for a low voltage test system of a locomotive. The power supply circuit comprises an electric leakage protection circuit breaker, a switch, an alternating current load, a power supply module and a direct current load, wherein the electric leakage protection circuit breaker, the switch, the power supply module and the direct current load are sequentially connected, the alternating current load is connected in parallel between the switch and the power supply module, the power supply circuit also comprises a current limiting resistor and a contactor, the current limiting resistor is connected between the switch and the power supply module, the contactor is connected in parallel between the power supply module and the direct current load, and a normally-open contact switch of the contactor is connected in parallel with the current limiting resistor. The power supply circuit has the advantages that the structure is simple, the current limiting resistor and the contactor are added on the basis of not changing the original circuit system structure, the problem of malfunction of the electric leakage protection circuit breaker caused by excessive impact current at the electrification moment is solved, and the normal work of the circuit is ensured.

The invention provides a three-rail six-winch calcium carbide furnace tapping control system. The system comprises a three-outlet calcium carbide furnace; winches, each two of which, as a group, are arranged at each outlet of the calcium carbide furnace; on-site control boxes which are arranged at the adjacent position of each winch set at each outlet position of the calcium carbide furnace; a wireless receiver for receiving an in-field signal; a PLC intelligent control system which is used for processing in-field information; a dispatching and production upper computer management system whichis operated on a PC to process the information in the field and send out a control instruction; a clutch position detection device is arranged in each winch, each pair of winches are connected through a steel wire rope and are in charge of advancing and retreating of a boiler car corresponding to a furnace outlet; hard wiring is replaced by the PLC system, safety interlock is achieved, the life cycle statistics function of the device is achieved, the operation area covers the whole tapping area, the defects of a prior calcium carbide furnace tapping device are overcome, the staff is reduced,the production is increased, the operation cost of a production enterprise is reduced, and the automation level of the calcium carbide furnace is improved.

The invention discloses an accidental-injury-preventing injector. The accidental-injury-preventing injector comprises a protective sleeve. A cylinder is sleeved with the protective sleeve, the protective sleeve has axial-rotation and sliding freedom degrees, and comprises an annular protruding fixing piece with a clamping positioning section and a releasing positioning section and a positioning buckle which is connected with the cylinder and comprises a pressing part and a clamping part, wherein the clamping part positions and clamps the annular protruding fixing piece, when the protective sleeve rotates to allow the releasing positioning section to correspond to the positioning buckle and presses the pressing part, the clamping part swings to an operating position from an initial position accordingly, and the annular protruding fixing piece breaks away from positioning and clamping of the clamping part. In this way, a user needs to meet the conditions of two kinds of movement at the same time, the protective sleeve can move outwards to cover the injector, and the incorrect movement problem caused when the pressing part is incorrectly touched is effectively solved.

A power supply compensating circuit is connected to a vehicle-mounted starting circuit and comprises a first input end, a second input end and an output end. The first input end is used for detecting the battery voltage level of the vehicle-mounted starting circuit; the second input end is connected with a rotor of a power generator of the vehicle-mounted starting circuit; and when the battery voltage level is equal to or larger than load rejection voltage level, the power supply compensating circuit compensates for the voltage level of the output end to enable the voltage level of the output end to be maintained to be a working level in the compensating time, wherein the working level is the voltage level for enabling an indicator light of the vehicle-mounted starting circuit to be off. Therefore, the power supply compensating circuit can prevent misoperation of the indicator light in the vehicle operation process.

The invention relates to a dual-power on-off control circuit for a servo system, belongs to the technical field of servo control and is used for solving the problem that the servo system may generate misoperatioin due to the inconsistency of the dual power supply cut-off time sequence. The circuit comprises a driving power supply, a digital power supply, an analog power supply, an on-off controller, and a driving circuit; the on-off controller outputs a control signal to control the driving circuit according to the detected on-off state of the digital power supply and the on-off state of the analog power supply; the driving circuit is switched on to drive a power supply to drive a motor to rotate, or the driving circuit is switched off to drive the power supply to stop the motor from being driven to rotate. The dual-power on-off control circuit for the servo system solves the problem of servo system malfunction caused by different voltage drop time of the two control power supplies due to the influence of resistance-capacitance characteristics of an analog circuit and a digital circuit when the two control power supplies are simultaneously powered off.

The invention discloses a relay. The relay comprises a first over-current detection circuit, a second over-current detection circuit, an over-current detection switching circuit, a time delay circuit,an over-current signal processing circuit, an over-current indication circuit and a protection action signal output circuit. When the first over-current detection circuit detects that an over-currentsignal exists in the loop, the over-current indication circuit sends out a first over-current indication signal. After the delay time set by the delay circuit, if the second overcurrent detection circuit still can detect the overcurrent signal, a second overcurrent indication signal is sent out, and the protection action signal output circuit outputs a protection action trigger signal to rear-endalarm action equipment. Therefore, the relay provided by the invention not only can respectively detect the conditions of instantaneous overcurrent and continuous overcurrent, but also can effectively avoid misoperation caused by overcurrent disappearance, and solves the problem of relay misoperation caused by millisecond-level overcurrent or surge existing in a detected loop.