78 results about "Dry contact" patented technology

The invention discloses a switching value acquisition device. Wherein the switching value acquisition device comprises a micro-control unit and a signal acquisition circuit with a connector and an abnormal detection circuit; the first access end and the second access end of the connector are connected with the positive electrode end of the contact switch, the third access end and the fourth access end of the connector are connected with the negative electrode end of the contact switch and used for collecting switching value signals output by the contact switch, and the first output end of the connector is connected with a first external power supply; the second output end and the third output end of the connector are connected with the micro-control unit, so that the micro-control unit receives a switching value signal; the anomaly detection circuit is connected between the signal output end and the input end of the micro-control unit; and the micro-control unit is used for performing state diagnosis on the switching value acquisition device through the anomaly detection circuit to obtain a state diagnosis result. The device can perform switching value signal acquisition on the wet contact switch and the dry contact switch, has a self-diagnosis capability, and improves the acquisition capability of the switching value signals.

According to the braking interface, the braking system and the braking method suitable for the heavy-load freight train, a front contact of a relay is connected to a dry contact of the locomotive braking system in parallel, after a main control computer breaks down or loses external power, the relay loses power, the front contact is disconnected, and then the dry contact is disconnected; and the unexpected emergency braking command cannot be output to the train, so that the potential safety hazard that the main control computer outputs the unexpected emergency braking command to the normally running heavy-load freight train due to failure or loss of external power is solved. Meanwhile, a sound-light alarm device is additionally arranged, and the lowest equipment list of the main control computer is automatically checked before the train is put into operation, so that the automatic protection function of the train is ensured to still conform to the fault-safety principle specified by the TB / T 2615-2018 railway signal fault-safety principle.

The invention relates to a dry contact acquisition device based on dynamic waves, a state judgment method and electronic equipment. The device comprises at least one acquisition circuit and a core calculation module, the core calculation module is used for judging the state of a dry contact and comprises three FPGA units, namely a first FPGA unit, a second FPGA unit and a third FPGA unit; each acquisition circuit comprises an upper transmitting optocoupler, a lower transmitting optocoupler, an upper back-lighting optocoupler and a lower back-lighting optocoupler. The third FPGA unit sends a dynamic wave to a sending optocoupler of the acquisition circuit, and the acquisition circuit acquires a signal of the dynamic wave passing through a dry contact through a return optocoupler and sends the signal to the first FPGA unit and the second FPGA unit which are in redundancy configuration; and the first FPGA unit and the second FPGA unit compare the received signals and judge the state of the dry contact in combination with the dynamic wave sent by the third FPGA unit. Compared with the prior art, the system has the advantages of simple structure, low cost, simultaneous acquisition of multiple nodes, accurate judgment of the dry contact state and the like.

The utility model provides a dry and wet contact acquisition circuit and industrial control equipment, and relates to the technical field of industrial control. The dry and wet contact acquisition circuit comprises a dry and wet contact detection module and a level transmission module, and the dry and wet contact detection module comprises a comparison unit. The comparison unit is used for comparing voltage amplitudes between the dry contact signal or the wet contact signal and a preset signal to obtain a first level signal or a second level signal; the level transmission module is used for transmitting the first level signal or the second level signal to the main control circuit. According to the embodiment of the utility model, the comparison unit is used for converting dry and wet contact signals into voltage amplitudes so as to output different level signals; and the level transmission module is used for transmitting the level signal to the main control circuit so as to provide an accurate output signal for identifying the current working state of the contact for the main control circuit.

The invention discloses a direct-current power relay capable of rapidly giving an alarm, and belongs to the technical field of power system alarm. Comprising a quick plug type electromagnetic driving module and a composite function base, and when the relay is in overvoltage, overcurrent, overheating, gas-liquid invasion or abnormal pressure intensity, a dry contact is output within 20ms-2s by utilizing a sliding-pressing-touching mechanism, bimetallic linkage, expansion triggering and phase change-corrugated pipe coupling, and an EMS / PLC / sound-light alarm is driven; repeating / fusing dual-mode protection is ensured through a low-friction sliding pair, elastic automatic reset and a replaceable low-melting-point alloy gasket, direct-current systems such as energy storage and charging piles are compatible, the size is not changed, and reliability is improved.

The invention discloses an electrical connection device and a contact arrangement method, the electrical connection device comprises a first connection part and a second connection part, a plurality of spring contacts are embedded in the middle of one end of the first connection part, and a plurality of contact columns are embedded in the middle of one end of the second connection part; a convex limiting protection part is embedded in the outer side of one end of the second connecting part, the convex structure surrounds the periphery of the spring contact, and a concave limiting protection part is embedded in one side of the first connecting part; according to the electrical connection device, through cooperation of the first connection part, the second connection part, the contact column and the contact groove, multi-angle combination and assembly can be realized, so that multi-angle correct connection of a circuit is realized; through cooperation of the concave limiting protection part, the convex limiting protection part, the first magnetic strip and the second magnetic strip, a magnetic attraction type plugging function is realized, meanwhile, during plugging, the direction is automatically corrected, electric leakage of a connecting part caused by water splashing is prevented, and the use safety is improved.

This utility model relates to an external trigger control device for a laser tracker, comprising: a power switch; a power conversion module; a first relay, the coil of which is connected in the output circuit of the power conversion module; and a second relay, wherein the external trigger signal is connected in series with the coil of the second relay. One end of the series connection is connected to one end of a first wire through a normally closed switch of the first relay and to the positive terminal of a DC power supply through a normally open switch of the first relay. The other end of the series connection is connected to the other end of the first wire through a normally closed switch of the first relay and to the negative terminal of the DC power supply through a normally open switch of the first relay. The switching signal of the normally open switch of the second relay is input to the external trigger port of the tracker controller. When the external trigger signal is a dry contact signal, the power switch is turned on; when the external trigger signal is a DC signal, the power switch is turned off. This utility model meets the needs of different types of external trigger signals, ensuring versatility and flexibility of use.

The utility model provides a control panel test platform. The control panel test platform comprises a sampling board, a short-circuit wire, a fixed resistor, a power grid simulator and an upper computer, the sampling board comprises a first dry contact state interface, a first temperature sampling interface, a first power grid and an inverter voltage sampling interface; the short-circuit wire is connected with the first dry contact state interface; the fixed resistor is connected with the first temperature sampling interface; the power grid simulator is connected with the first power grid and the inverter voltage sampling interface; the sampling board is further connected with a control board to be tested, and the upper computer is connected with the control board to be tested. The circuit board to be tested can simulate actual signals and input set digital signals, not only can the response of the circuit board to be tested to the actual input signals be judged, but also the response of the circuit board to be tested to the digital signals with strict requirements can be judged, the structure is simple, the cost is low, and the test efficiency can be improved.

A device includes a device input, an output connector configured to connect to a current loop, and current loop transmitter circuitry. The current loop transmitter circuitry receives, via the device input, an input from a dry contact switch, and translates a state of the dry contact switch to a current loop current. The current loop transmitter circuitry transmits the current loop current via the output connector through the current loop.

The utility model relates to the technical field of dry contact equipment protection, and discloses a dry contact input signal protection circuit, dry contact equipment and a distributed photovoltaic system, the dry contact input signal protection circuit is applied to the dry contact equipment, and an input end of a power supply current-limiting and surge protection circuit is connected with a power supply end of voltage output; the output end of the power supply current-limiting and surge protection circuit is connected with the signal input end of the dry contact equipment; the input end of the surge protection circuit is connected with the signal output end of the dry contact equipment; the signal output end of the dry contact device is sequentially connected with the signal isolation circuit, the level conversion circuit, the voltage clamping circuit and the MCU. According to the utility model, the direct connection state of the dry contact equipment is protected, and the problem that the dry contact equipment is directly and externally connected with outdoor or high-voltage power supply equipment in a non-isolated state and the equipment is damaged due to surge is avoided.

The utility model discloses a lightning protection system, comprising a DC lightning arrester, a relay and a battery cluster; the neutral line of the battery cluster is connected to the neutral line of the mains; the live line of the battery cluster is connected to the relay and is connected in series to the live line of the mains through a group of normally open contacts of the relay; the normally open contact is closed when the coil of the relay is energized; the coil of the relay is connected in series with the normally closed dry contact of the DC lightning arrester; the normally closed dry contact is powered off when the DC lightning arrester detects a lightning strike; a lightning protection circuit constructed by the DC lightning arrester and the relay is arranged between the battery cluster and the DC busbar, and when the DC lightning arrester detects a lightning strike, the connection between the struck battery cluster and the main control box can be disconnected in real time, and the electrical equipment of the device can be protected immediately; at the same time, the EMS can limit the charging and discharging current and perform power-off operations on the entire energy storage system through feedback signals, thereby realizing a comprehensive protection function for the system and achieving more comprehensive protection, thereby improving the safety of the energy storage system.

A dynamic wave-based dry-contact acquisition apparatus, a state determination method, and an electronic device. The apparatus comprises at least one acquisition circuit and a core computation module. The core computation module is used for determining a state of a dry contact, and comprises three FPGA units, that is, a first FPGA unit, a second FPGA unit, and a third FPGA unit. Each acquisition circuit comprises upper and lower transmitting optocouplers and upper and lower return-acquisition optocouplers. The third FPGA unit transmits a dynamic wave to the transmitting optocouplers of each acquisition circuit, and each acquisition circuit acquires, by means of the return-acquisition optocouplers, signals obtained after the dynamic wave passes through the dry contact, and transmits the signals to the first FPGA unit and the second FPGA unit which are redundantly configured. The first FPGA unit and the second FPGA unit perform cross‑comparison on the received signals, and determine the state of the dry contact in light of the dynamic wave transmitted by the third FPGA unit. The apparatus has advantages such as structural simplicity, low cost, simultaneous acquisition at a plurality of nodes, and accurate determination of dry-contact states.

The present invention discloses a method and system for generating a core undercooling margin low safety injection drive signal, the method comprising respectively obtaining three undercooling margin low dry contact signals sent by two signal processing systems of a core measurement system; performing a two-out-of-three logic vote on the three undercooling margin low dry contact signals to generate a low undercooling margin signal; performing an AND logic operation on the undercooling margin signal, a P11 signal and a P15 non-signal to generate a safety injection drive signal. The present invention is designed with a function of automatically triggering safety injection due to low core undercooling margin in the reactor protection system, that is, when there is a P11 permission signal and no P15 permission signal, if the reactor coolant cooling margin is low, it is necessary to automatically start the safety injection, thereby ensuring the safety of the reactor.

The utility model relates to the technical field of double-contact relays, in particular to a relay convenient to install, which comprises a base, a microswitch, a magnetic circuit assembly, a plurality of contact assemblies and a pushing piece, the magnetic circuit assembly is installed on the lower side of the base, the contact assemblies are installed on the upper side of the base, the pushing piece is arranged between the magnetic circuit assembly and the contact assemblies, and the microswitch is arranged on the pushing piece. A microswitch is arranged at the bottom of the pushing piece, the pushing piece comprises a pushing longitudinal rod, a connecting groove and a plurality of clamping parts, the connecting groove is formed in the side, close to the magnetic circuit assembly, of the bottom of the pushing longitudinal rod, the clamping parts are arranged on the back side of the upper portion of the pushing longitudinal rod, each clamping part comprises a first protruding block and a second protruding block, and the first protruding blocks and the second protruding blocks are arranged on the two sides in a staggered mode respectively. According to the utility model, the detachable push sheet is arranged, thereby simplifying the installation and disassembly processes, reducing the installation and maintenance time of equipment, improving the reliability of the relay, and facilitating the adjustment at any time; through reasonable layout, the occupied space of the relay is reduced, the layout is more compact, and the space is saved.

1. Name of the designed product: Controller (mini single channel MINI-D). 2. Use of the designed product: for mini single channel dry contact controller. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention provides a dry contact configuration method and device and power supply equipment thereof. The method comprises the following steps: receiving a dry contact configuration instruction; wherein the dry contact configuration instruction comprises configuration information and a first level corresponding to at least one dry contact, and the configuration information at least comprises a dry contact function bit identifier and an effective level identifier corresponding to the dry contact; and for each dry contact, performing first logical operation based on the effective level identifier and the first level, determining a target level of the dry contact, and storing the target level to a storage address corresponding to the dry contact function bit identifier.

The utility model relates to a dry contact water -cooling relay unit for coal mine safety monitoring, including heat dissipation base, still including the relay unit body of installation in heat dissipation base upper end, the fixed hole for being used for fixed is opened to heat dissipation base, the lower extreme of relay unit body is equipped with a plurality of radiating fins, and the radiating fin extends downward and embeds heat dissipation base inside, forms the heat conduction passage, the water -cooling assembly is covered in the outside of relay unit body, and water -cooling assembly surrounds relay unit body setting, and cooling medium flows in the flow channel in water -cooling assembly inside along the circumferential direction and axial direction of relay unit body continuously, the novel realizes the heat dissipation of multiple paths through the heat conduction cooperation of radiating fin and base and the surrounding cooling of water -cooling assembly, and the even dispersion heat load is realized, and the air interlayer between the inner and outer shell is simultaneously used as heat isolation barrier, and the heat transfer is restrained, and the shell surface temperature is effectively controlled, and the essential safety and operation stability of equipment in the inflammable environment of coal mine are enhanced.

The utility model discloses a dry contact input detection circuit and device, and relates to the technical field of signal detection, the detection circuit comprises a photoelectric coupler, a first triode and a constant current module, the light emitting side input end of the photoelectric coupler and the collector electrode of the first triode are connected with a power supply; the light-emitting side output end of the photoelectric coupler and the emitting electrode of the first triode are connected with the constant current module; the anode of the first diode is connected with the power supply, the cathode of the first diode is connected with the first detection end and one end of the first resistor, the other end of the first resistor is connected with the base of the first triode and one end of the second resistor, and the other end of the second resistor is connected with the second detection end and the constant current module; and the light receiving side of the photoelectric coupler is connected with the signal analyzing and processing module, and the signal analyzing and processing module judges whether the circuit of the dry contact is normal or not according to the working state of the photoelectric coupler. According to the invention, both a passive dry contact and an active dry contact can be detected.

The utility model discloses a multi-fire-fighting linkage communication module for an emergency lighting centralized power supply, which comprises a shell, a single chip microcomputer used for processing fire-fighting linkage signals is arranged in the shell, and a voltage interface, a passive dry contact interface and an RS485 interface are arranged on the shell. The single-chip microcomputer is respectively connected with the voltage interface, the passive dry contact interface and the RS485 interface, and the single-chip microcomputer is connected with the emergency lighting centralized power supply main control unit through the RS485 interface. The communication module integrates various signal interfaces and can adapt to various common communication modes in the market, such as dry contact signals, alternating current and direct current voltage signals and RS485 signals, so that only one communication module can meet various use requirements to adapt to different occasions, the use is convenient, the size of the module can be effectively reduced, the occupied space is reduced, and the cost is reduced. And the cost is saved.

The utility model discloses a detection circuit for a dry contact, which belongs to the field of circuit detection and is characterized in that a microcontroller has six input signals AI1-AI6, and a voltage signal enters an input interface of the microcontroller for logical operation after being sent into the detection circuit for processing through a sampling end. The voltages detected by the AI1-AI5 of the microcontroller and the voltage detected by the AI6 are subtracted respectively, and whether the S1 or S2 or S3 or S4 or S5 of the corresponding dry contact is in an open state or a closed state is judged according to the obtained voltage result value. The dry contact detection circuit disclosed by the utility model is good in compatibility, simple in structure, small in number of components, high in withstand voltage level, small in size, low in cost, suitable for a household energy storage inverter, simple in judgment logic, easy to realize, and capable of accurately and quickly judging the closing condition of each controlled switch.

The utility model relates to the technical field of analog signal acquisition, solves the problems of large wiring work amount, high cost and difficult troubleshooting and maintenance caused by a large number of communication lines required for signal acquisition of a special gas detector in the prior art, and discloses a special gas detector signal acquisition device which comprises a mainboard, the main board is provided with a signal output end, a 485 communication chip, a single-chip microcomputer and a plurality of first signal input ends. Analog quantity signals and dry contact signals of a plurality of special gas detectors can be integrated and converted into digital signals through the single-chip microcomputer; therefore, signal transmission between a plurality of special gas detectors and the signal collection equipment can be realized by using one two-core cable, so that the cable cost required by implementation, the engineering quantity of construction and the construction difficulty can be greatly reduced, and the number of the cables is greatly reduced.

A system may include a water leak detector including a housing. The housing includes a sensor configured to detect presence of moisture and one or more dry contacts configured to change state in response to the sensor detecting presence of moisture. In response to the one or more dry contacts changing state, the leak detector is configured to modify an operational state of an appliance connected in electrical communication with the leak detector.

A computer-implemented method of distributing traffic includes distributing, to a first distributed unit (DU), traffic via a first path, receiving, from the first DU, an indication generated by a first dry contact alarm of the first DU that a state has changed in the first DU, switching, by an optical switch, the traffic from the first path to a second path based on the indication from the first DU, and distributing, to a second DU, the traffic via the second path.

The present invention provides a bidirectional transmission dry contact converter and a working method thereof, wherein the converter includes a microcontroller, the microcontroller is respectively connected to a Bluetooth module, an input conversion circuit and an output conversion circuit, the input conversion circuit includes at least one input terminal and a common terminal, and the output conversion circuit includes at least one output terminal; and the bidirectional transmission dry contact converter also includes a connection port and a conversion detection circuit, the connection port includes at least one connection terminal, one connection terminal is connected to an input terminal and an output terminal, and the connection port is also connected to the common terminal; the conversion detection circuit includes at least one OR gate, the first input end of the OR gate is connected to the connection terminal, and the output end of the OR gate outputs a detection signal to the microcontroller. The present invention also provides the working method of the above-mentioned bidirectional transmission dry contact converter. The present invention can realize the automatic switching of the working mode of the bidirectional transmission dry contact converter.

The utility model relates to the technical field of double-contact relays, in particular to a novel double-contact relay, which comprises a plurality of contact assemblies, static spring leading-out sheets are arranged at the tops of the contact assemblies, each static spring leading-out sheet is provided with a main contact and an upper auxiliary contact, a lower main contact is arranged below the main contact, and the lower auxiliary contact corresponds to the lower part of the upper auxiliary contact. The lower main contact and the lower auxiliary contact are installed on one side of the conducting strip, one side of the conducting strip is fixed to one side of the movable spring leading-out piece, the pushing piece comprises a longitudinal connecting piece, a plurality of contact assemblies and an auxiliary piece, the multiple contact assemblies are arranged on the inner side of the longitudinal connecting piece, and each contact assembly comprises an upper contact piece and a lower contact piece. A step block is arranged below one side, close to the lower auxiliary contact, of the upper contact piece, and the lower side of the lower contact piece is connected with an auxiliary piece which can move up and down and is arranged in the movable spring leading-out piece groove. According to the utility model, the main contact and the auxiliary contact enable the auxiliary contact to be opened or closed successively through the upper contact sheets with different heights on the push sheet, thereby avoiding arc impact and improving circuit safety.

The invention discloses a dry contact acquisition module and a channel self-checking system, relates to the technical field of industrial control, and can control an optical MOS (Metal Oxide Semiconductor) relay and a triode switch protection circuit to work through a GPIO (General Purpose Input / Output) pin of a micro-control unit in the module under the condition of input failure of an external control power supply so as to output a control power supply for an acquisition channel. Besides acquisition of external dry contact input signals, the device also has reverse protection and short-circuit protection functions, and can not damage devices on an acquisition access when external input is an active contact. Whether the working state of the channel is normal or not can be detected before an external dry contact signal enters, preliminary judgment and analysis are made, and timely adjustment is carried out according to the abnormal state so as to ensure the correctness of external signal acquisition.

The utility model discloses an air injection cover plate and wafer drying equipment. According to the air injection cover plate, a drying groove body is covered with the air injection cover plate, a first main injection pipeline and a second main injection pipeline which are used for drying wafer surfaces of different sizes are arranged on the air injection cover plate, and a set of first auxiliary injection pipelines and two sets of second auxiliary injection pipelines are arranged on the air injection cover plate. The first auxiliary spraying pipeline and the second auxiliary spraying pipeline are provided with spraying openings facing the interior of the drying groove body, and the first auxiliary spraying pipeline and the second auxiliary spraying pipeline correspondingly dry contact point gaps of wafers of different sizes. According to the utility model, the air injection cover plate is provided with the first main injection pipeline and the second main injection pipeline to dry the wafer in a large area; a first auxiliary spraying pipeline and a second auxiliary spraying pipeline are further arranged, the first auxiliary spraying pipeline and the second auxiliary spraying pipeline can correspondingly dry wafer contact point gaps of different sizes, and connectors are arranged on the first auxiliary spraying pipeline and the second auxiliary spraying pipeline, so that the first auxiliary spraying pipeline and the second auxiliary spraying pipeline can be selectively connected with the main spraying pipe according to the sizes of wafers to be dried.

The utility model relates to a signal acquisition circuit and device, and the circuit comprises a signal interface which is used for the access of a signal to be acquired, and the signal to be acquired comprises a high-voltage control signal, a low-voltage control signal, and a dry contact signal; the acquisition unit is used for outputting a state indication signal capable of representing the state of the to-be-acquired signal when the to-be-acquired signal is received; the high-impedance acquisition channel is connected between the signal interface and the acquisition unit and is conducted when the signal to be acquired is a high-voltage control signal; the low-impedance acquisition channel is connected between the signal interface and the acquisition unit and is conducted when the signal to be acquired is a low-voltage control signal; and the dry contact acquisition channel is connected between the signal interface and the acquisition unit and is used for conducting when the to-be-acquired signal is a dry contact signal. According to the utility model, various types of equipment control signals can be acquired, the circuit structure is simple, the size and the weight are small, the portability is strong, and the acquisition efficiency of the control signals can be improved.

A braking interface, braking system, and braking method suitable for a heavy-haul freight train. A front contact of a relay is connected in parallel to a dry contact of a locomotive braking system. When a failure occurs in a main control computer or the main control computer loses external power, the relay is de-energized, causing the front contact to open and the dry contact to open accordingly, thereby preventing an unintended emergency braking command from being outputted to a train, so that the potential safety hazard of output of an unintended emergency braking command to a normally running heavy-haul freight train caused by a failure or loss of external power in a main control computer is solved. In addition, by additionally providing an acousto-optic alarm apparatus and performing an automatic minimum equipment list check on the main control computer before commissioning, it is ensured that an automatic protection function of the train still complies with the fail-safe principle specified in "TB / T 2615-2018: Fail-safe principle of railway signaling".

The embedded multifunctional acquisition control circuit comprises an MCU control circuit, a relay circuit, a 485 circuit and a dry contact circuit, the relay circuit, the 485 circuit and the dry contact circuit are respectively connected with the MCU control circuit, and the 485 circuit comprises an RS-485 / 422 transceiver, a resettable fuse and a TVS tube implementation circuit. The TVS tube implementation circuit is electrically connected with the RS-485 / 422 transceiver through the resettable fuse, and the RS-485 / 422 transceiver is connected with the MCU control circuit. Compared with the prior art, the RS-485 / 422 transceiver has high electrical isolation, the dry contact circuit with 16 dry contacts is adopted, configuration can be carried out according to actual requirements of customers, unnecessary redundant interfaces are reduced, and the requirements of industrial application are met.