15 results about "Relay logic" patented technology

The invention provides a DC micro-grid insulation resistance monitoring device for an optical storage DC flexible system. The DC micro-grid insulation resistance monitoring device comprises a detection circuit and a controller communicating with the detection circuit. The device is connected to multiple paths of positive direct current buses including distributed photovoltaic branches and energy storage system branches in a direct current micro-grid through a Y-shaped connecting circuit, and relay logic is switched by utilizing a controller to obtain an output voltage signal. The core judgment logic is to compare whether the output voltage is in a reasonable interval defined by a coefficient gamma (the value can be dynamically adjusted according to the energy storage voltage grade) and the bus voltage, so that the insulation abnormity of the direct current micro-grid system under the flexible interaction working condition is quickly identified, and an alarm is given. According to the device, the operation process of multi-branch complex impedance is simplified, and the detection efficiency of the ground insulation state of the direct current end is remarkably improved.

The utility model discloses an elevator voice reminding system which is arranged on an elevator and comprises a relay logic judgment module and a voice broadcast module, and the relay logic judgment module is respectively connected with the voice broadcast module, a power supply of the elevator, an overvoltage and undervoltage protector and a light curtain and is used for reminding the elevator according to the detected working states of the power supply, the overvoltage and undervoltage protector and the light curtain. And the voice broadcast module is controlled to work. According to the elevator voice reminding system, the relay logic judgment module and the voice broadcasting module which are connected are arranged, and the relay logic judgment module is connected with the power source, the overvoltage and undervoltage protector and the light curtain of the elevator so as to detect the working states of the power source, the overvoltage and undervoltage protector and the light curtain; the voice broadcast module is directly controlled to work through the relay logic judgment module according to a detection result, power failure alarm, voltage fluctuation alarm and door blocking behavior alarm can be achieved without accessing a control mainboard of the elevator, the logic judgment and voice broadcast control process does not depend on program control, and the fault rate is reduced.

The utility model discloses an automatic control system and liquid supply device of alcohol group liquid fuel intelligent safety liquid supply device belongs to alcohol group fuel supply technical field, and the system includes power conversion circuit, float ball control module, relay control circuit and alarm circuit. The float ball control module includes the first, second and third float ball switch of setting at different liquid level. When working normally, the second float ball switch controls the first relay, to realize the automatic start -stop of fuel delivery pump and oil supplement. The first float ball switch and third float ball switch series connection control second relay, and the normally closed contact of second relay is connected alarm circuit. When the second float ball switch failure leads to liquid level too high, or the liquid level of steel bottle is too low and leads to, all can trigger second relay action, and start alarm. The utility model discloses through the cooperation of multiple float balls and the control of double relay logic, realizes automatic oil supplement, high liquid level redundancy protection, low liquid level liquid alarm and fuel delivery pump dry pumping protection and other functions.

This utility model discloses a conventional relay logic device for "N-to-M" signal selection. Taking "5-to-3" signal selection as an example, it mainly consists of a signal input module, a logic synthesis and judgment output module, and a signal source early warning and device fault alarm output module. The signal input module mainly consists of 5 branches; the logic synthesis and judgment output module mainly consists of 2 branches; and the signal source early warning and device fault alarm output module mainly consists of 12 branches. This utility model is used to ensure the reliability of the signal source and avoid large-scale emergency equipment operation caused by malfunctions, which could lead to losses in engineering projects. It performs "N-to-M" logic judgment on the signal source circuit. It has standardized design specifications, a wide range of applications, and can be directly installed and used. It is suitable for various hydropower and power engineering projects, as well as various industries that use "N-to-M" logic to improve signal accuracy.

The invention belongs to the technical field of combustible gas safety protection, discloses a direct safety interlocking method for a combustible gas detector without a PLC (Programmable Logic Controller) and a fan, and provides a direct safety interlocking system for the combustible gas detector without the PLC and the fan. Comprising a combustible gas detection unit, a core control unit, a fan driving unit, a power supply guarantee unit and a state feedback unit, all the units are directly connected through hard wires, no intermediate programmable control module exists, and all logic judgment and action triggering are completed through a hardware circuit. The core control unit adopts a logic combination design of an analog signal comparator and a relay, and is internally provided with a double-path signal processing channel and a fault signal identification circuit. PLC dependence is abandoned, a control link is simplified, response time is shortened, reliability is improved through redundancy design and fault self-inspection, cost and maintenance difficulty are reduced, and the safety protection requirement of a small scene is met.

This invention is a robust pressure testing system designed for harsh environments with minimal user interaction and easy maintenance. It utilizes standardized electromechanical components and relay logic, avoiding custom elements to ensure long-term reliability and reduce obsolescence. The system operates at 24 VDC and accepts AC, internal battery, or external DC power, with overcurrent protection provided by fuses and breakers. It can pressurize and evacuate test volumes to user-specified levels, monitoring for leaks through pressure decay. The pneumatic system generates positive and negative pressures, controlled by electrically actuated valves, with filters and dryers preventing contamination. The instrumentation includes a pressure transducer and process timer for precise measurements, enhancing usability and adaptability in varied environments. Modular components and self-diagnostic features further improve system performance and compatibility.

The utility model relates to the electric control system technical field of the fire fighting and environmental protection facilities of extra -high voltage converter station, concretely is a kind of extra -high voltage converter station accident oil discharge system front selection valve control circuit.The control circuit includes double power switching module, miniature circuit breaker, far / local switching switch, manual button, high -power relay, intermediate relay and a variety of control contact point.Valve A and valve B's linkage control are realized by relay logic, have local, remote, fire linkage and liquid level interlock multiple control mode, cancel programmable logic controller (PLC), simple structure, strong anti -interference ability, low in cost, high reliability, it is applicable to the strong electromagnetic interference environment of extra -high voltage converter station.The utility model effectively promoted the response speed and operating reliability of accident oil discharge system, with good practicality and popularization value.

The invention relates to the technical field of electric energy meter detection, in particular to an electric energy meter power supply test device, system and method, the device comprises an AC power supply module, a relay group module and a control module, the AC power supply module is responsible for providing test voltages of different specifications, and the relay group module adopts a design that four groups of relays are connected in series; the logic on-off state of each relay is accurately regulated and controlled through the control module, flexible switching of multiple voltage levels is achieved, and therefore test voltages of different specifications can be output to the electric energy meter. The device supports a self-defined power-on / power-off cycle test process, and the power supply test efficiency of the electric energy meter is remarkably improved; meanwhile, the device can truly restore the voltage fluctuation scene faced by the electric energy meter in the operation of the power grid by simulating the rapid jump of the voltage level, thereby further guaranteeing the reliability of the test result.

The utility model discloses a conventional relay logic ventilation fan control device capable of being started and stopped in a grading and classifying mode. The conventional relay logic ventilation fan control device mainly comprises a fan control module, a control condition input module and a signal output module. Taking two fans as an example, the fan control module is mainly composed of four branches (totally eight branches) of a first fan and four branches (totally eight branches) of a second fan. The control condition input module is divided into three priorities according to fan start-stop control requirements, and each priority derives a plurality of branches according to different control types. Wherein the priority 1 control condition input loop is mainly composed of eight branches, the priority 2 control condition input loop is mainly composed of three branches, and the priority 3 control condition input loop is mainly composed of eight branches. The signal output module is mainly composed of three branches, namely 20 branches. The device is standard and normative in design, wide in application range, capable of being directly installed and used and used for building ventilation control systems in various industry fields, and the modules can be correspondingly stacked according to the number of draught fans.

The invention discloses an electric-manual collaborative lifting system and lifting method for distribution network equipment. The system comprises a core collaborative decision module, a mode logic switching module, an operation execution control module, a state monitoring feedback module, a man-machine interaction enhancement module, an environment adaptive adjustment module, a safety protection verification module and a digital twinning mapping module. And the core collaborative decision module is used for summarizing cross-module real-time state information, sorting task priorities and allocating collaborative instructions. A traditional mechanical clutch is replaced by solid-state relay logic control through contactless switching, mode switching jamming is avoided, and the mechanical maintenance cost is reduced; global scheduling is carried out through multi-source data integration of core collaborative decision and a particle swarm optimization algorithm, and the scientificity and collaborative efficiency of instruction generation are improved.

A system for improving grid reliability in remote or isolated locations includes a battery tripping module, the battery tripping module determining whether a microgrid zone may be formed upon a fault. The system further includes a microgrid formation module, the microgrid formation module forming a microgrid zone, the microgrid zone connected to a BESS (battery electric storage system), the BESS providing power to the microgrid.

The utility model discloses a crane voltage-regulating speed-regulating control system capable of realizing fault-tolerant switching. The crane voltage-regulating speed-regulating control system comprises a control power supply loop, a gear transition loop, a limiting transition loop, a switching control loop and a driver control loop, wherein the switching control loop and the driver control loop are used for mode switching during a fault; the control power supply loop provides alternating current power for the whole control system, the gear transition loop collects operation signals of an operator into the control system, the limiting transition loop collects operation limiting information of the crane, and the switching control loop and the driver control loop are used for achieving action recognition and execution of mode switching. According to the utility model, the control panel based on the core driver, namely the voltage and speed regulation control device is highly integrated and has an industrial Ethernet control function, so that the logic control mode of the relay is switched when the control mode of the industrial Ethernet fails in the operation process of the crane through the cooperation of all loops; the problem that an existing crane pressure and speed regulation control system is insufficient in fault-tolerant capability is solved.

This application discloses an online program upgrade architecture and method for modular string inverters. The architecture includes a relay control logic unit and multiple controller DSPs. Each string module controls a relay group through at least one controller DSP. The relay control logic unit controls the relay groups connected to the grid and the load. When at least one controller DSP is being upgraded, the controller DSP controls the corresponding string module's relay group to disconnect. The relay logic control unit continues to maintain the relay group closed through communication with the other controller DSPs. The method is implemented using the above architecture. The beneficial effects of this application are: for string module inverter systems, an online program upgrade scheme and an upgrade preparation power redistribution control method are proposed, which can ensure that the grid-side relays remain in the conducting state during the program upgrade process, ensuring the reliability of the load power supply; at the same time, the entire upgrade process can be smoothly switched to minimize AC side power changes.

The invention discloses a harmonious locomotive simulation operation practical training platform, which comprises a practical training platform frame, a part mounting plate is arranged on the practical training platform frame, and a pantograph loop and a main circuit breaker loop are arranged on the part mounting plate. The pantograph loop comprises a one-end loop, a power loop and a pantograph rising relay, the input end of the one-end loop is electrically connected with the power loop, the output end of the one-end loop is electrically connected with the pantograph rising relay, the pantograph indicating lamp is connected with the pantograph rising relay and simulates the working state of a pantograph, and the input end of the main circuit breaker loop is electrically connected with the power loop. The main circuit breaker loop is electrically connected with the pantograph rising relay of the loop at one end, the main circuit breaker loop controls the switching-on and switching-off states of a main circuit breaker, the pantograph rising relay is electrically connected with a main circuit breaker switching-on and switching-off indicating lamp, and the main circuit breaker switching-on and switching-off indicating lamp simulates the switching-on and switching-off states of the main circuit breaker. Relay logic is used for replacing complex TCMS software programming, hardware cost is reduced, extension can be carried out according to requirements, and the method is suitable for large-scale application and popularization.

The application discloses a power battery control system of a vehicle. The system uses three input ends of a system basic chip and a main control chip to control a relay of a power output of a power battery of the vehicle through a logic circuit. When a first input end of the logic circuit is at a high level and levels of a second input end and a third input end are opposite, the logic circuit outputs an effective level signal to a drive circuit of the relay; otherwise, the logic circuit is at a high resistance state. Thus, the power battery control system of the vehicle provided by the application can maintain the relay closed for a period of time before the relay is opened when the MCU and / or the SBC fails, the control signal of the MCU and / or the SBC suddenly drops, the logic circuit is at the high resistance state, and the voltage of the control signal received by the relay slowly drops due to the existence of an oscillation circuit connected to an output end of the logic circuit, so that the vehicle does not suddenly lose power, and the safety of the vehicle is improved.