90 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 relates to the technical field of flow meters, in particular to a pointer adjusting type dry contact metal tube float flow meter alarm switch which comprises an alarm pointer, a shell is sleeved outside the alarm pointer, one end of the alarm pointer is connected with a magnetic switch, a supporting seat is arranged inside the shell, and a magnet is arranged at one end of the supporting seat. When the flow of the flow meter reaches a preset threshold value, the magnetic substance in the metal pipe triggers the ferromagnetic material in the reed pipe, so that the circuit in the reed pipe is closed, the magnetic switch and the alarm pointer are triggered at the moment, and then the flow meter outputs an alarm signal. A dry contact signal of the reed switch is controlled through the magnet, the reed switch can be directly connected into an electrical loop in series, an external power supply is not needed, an isolation gate or a relay is not needed, electric sparks are not generated when the reed switch is used as the dry contact signal during triggering, and therefore contact abrasion and electric arcs are not caused.

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.

The utility model discloses a wireless residual current detection module, which belongs to the technical field of current detection and comprises a shell, and a power circuit module, a DC-DC conversion circuit module, a WiFi control circuit module, a CPU, a residual current measurement circuit module, an auxiliary contact circuit module and an RS485 communication interface circuit module are arranged in the shell. The power supply circuit module is electrically connected with the WiFi control circuit module and the CPU through the DC-DC conversion circuit module; according to the utility model, the DC-DC conversion circuit module, the WiFi control circuit module, the CPU, the residual current measurement circuit module, the auxiliary contact circuit module and the RS485 communication interface circuit module are arranged, so that the module can measure the residual current and detect the leakage current, and transmits the measured data to an Internet of Things control center through a WIFI, NB or RS485 signal line, and the module is convenient to use, high in reliability and high in reliability. And the module is provided with a pair of conversion dry contacts for realizing automation (for example, when the measured residual current exceeds a set value, the contact action controls the separation of the protection switch).

The utility model relates to a safety circuit fault feedback device and an escalator. The safety circuit fault feedback device comprises a power supply, a motor power supply controller coil, a current detection unit, a processing unit and a plurality of safety switches, the safety switch comprises a contact acting according to the fault of the safety component; the plurality of contacts are connected in series with a motor power supply controller coil and a power supply to form a safety loop; each contact is correspondingly connected with a resistor, each resistor is connected in series between the corresponding contact and the current detection unit, the plurality of contacts are connected in series with the respective corresponding resistors, the power supply and the current detection unit to form a plurality of first loops, and the plurality of first loops are connected in parallel to form a fault feedback loop; and the processing unit is connected with the current detection unit and is used for positioning the acting contact according to the current value of the fault feedback loop transmitted by the current detection unit. The safety loop and the fault feedback loop share the same auxiliary contact, the acting contact is positioned through the current value, fault collection points do not need to be arranged for all the switches, and the problem that the fault feedback cost is high is solved.

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 invention discloses a ring network cabinet, comprising: a master reclosing circuit breaker and each slave reclosing circuit breaker are connected to different power lines, the master reclosing circuit breaker is connected to an external control terminal through a dry contact circuit, and is connected to each slave reclosing circuit breaker; when the master reclosing circuit breaker or at least one slave reclosing circuit breaker fails, the master reclosing circuit breaker controls the dry contact circuit to be turned on, and sends an alarm signal to the external control terminal, and the external control terminal sends an alarm signal to notify maintenance personnel to perform maintenance, thereby realizing online monitoring of the operating status of the ring network cabinet and reducing maintenance costs.

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.

The utility model belongs to the technical field of battery management, and relates to a dry contact feedback detection circuit, which comprises a dry contact module, a dry contact signal transmission module, a BMS module, a charging and discharging switch module and a battery module, and is characterized in that the dry contact module outputs a corresponding dry contact feedback signal to the dry contact signal transmission module according to the connection state of a power line; the dry contact signal transmission module is used for carrying out signal conversion and then transmitting the converted signal to the BMS module, and the BMS module is used for controlling the connection or disconnection of the charging and discharging switch module, so that the battery module carries out corresponding charging and discharging. The utility model further relates to a power utilization device. According to the technical scheme provided by the invention, high voltage can be ensured to be applied to the battery module under the condition that the dry contacts are closed, so that heating and sparking phenomena caused by virtual connection of a power line are avoided, and the energy storage safety is prevented from being influenced; the reliability of the whole system can be improved through dry contact detection, and the BMS module can quickly confirm the position of a fault point under the condition that virtual connection exists in a power line and the power line is not correctly plugged in place.

The invention discloses a container bottom lock detection method based on computer vision, and relates to the technical field of container body lock detection, and the method comprises the following steps: 1, starting a transfer platform lock detection system; 2, a camera is used for capturing and recognizing the lock head, whether the lock head exists or not is detected, and if yes, a server controls the lock head to send out a dry contact signal; if the existence of the lock head is not detected, the server judges whether a dry contact signal needs to be sent out or not, and then the path of signal is closed; 3, the PLC industrial personal computer judges whether a dry contact signal is received or not, and if the dry contact signal is received, the step 4 is executed; the method follows a doubtful subordinate principle, focuses on no missing detection on algorithm and software business levels, combines two modes of computer vision detection and manual inspection detection, solves extreme situations which cannot be identified by some algorithms by utilizing a manual inspection mode, further reduces missing report rate and false alarm rate, and improves the detection accuracy. And therefore, the safety in actual business work can be ensured.

The invention discloses an EMS system of an energy storage power station, an energy storage system and an energy control method, and relates to the technical field of energy storage systems. The invention discloses an EMS system. The EMS system is in cable connection with a plurality of energy storage cabinets through a first cascade link and a second cascade link; each energy storage cabinet is provided with two pairs of input and output terminals, the first cascade link is formed based on one pair of input and output terminals among the energy storage cabinets, the second cascade link is formed based on the other pair of input and output terminals among the energy storage cabinets, and the second cascade link and the first cascade link form a reverse link; and when the EMS system detects that the communication fault occurs with the energy storage cabinet, two paths of dry contact signals are output, and the energy storage cabinet with the communication fault on the first cascade link and / or the second cascade link is controlled to stop. According to the invention, the power of the whole station can be timely, reliably and effectively adjusted, the operation safety of the whole station is ensured, the cost of the EMS system is reduced, and the reliability of the EMS system is improved.

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.