Abstract: An explosion-proof structure is formed by a fastener, two internal space-forming members joined together to form an internal space by the fastener being inserted into an insertion hole and fastened to a fastening hole, and a plug attached to the insertion hole so as to cover the head of the fastener.

Abstract: In an information processing device, a communication control unit performs communication using a first communication method and using a second communication method that is faster than the first communication method. An equalizing unit performs an equalization operation using the first communication method with respect to a first information processing device in a redundancy system in which redundancy is achieved between the first information processing device and a second information processing device using the first communication method. After the equalization operation is completed by the equalizing unit, another equalizing unit performs the equalization operation using the second communication method with respect to a third information processing device, and builds a redundancy system in which the concerned information processing device and the third information processing device are used.

Abstract: A signal detecting device includes a multiplier that multiplies a measurement signal by a reference signal, a filter that filters a multiplication result from the multiplier, a first storage that stores an internal state of the filter; and a second storage that stores a filtering result from the filter. The filter filters the multiplication result using the internal state stored in the first storage. The first storage switches an area in or from which the filter writes or reads the internal state in accordance with an index signal representing a type of amplitude of a time-divisional signal in the measurement signal. The second storage switches an area in which the filtering result is stored in accordance with the index signal.

Abstract: An information collection apparatus includes a receiving unit that receives an alarm indicating an abnormality related to a control station that is for a plant, and a collection unit that collects investigation information on a cause of the alarm from a part of the control station, where the part is identified based on the alarm received by the receiving unit.

Abstract: An information processing device uses models generated under different conditions, and predicts alarms occurring in the case in which each of a plurality of operation patterns, which is virtually generated in relation to the operation of an actual plant by a worker, is implemented with respect to the actual plant. Then, the information processing device sets the degree of reliability of the prediction result regarding each of the plurality of operation patterns. Subsequently, based on the degree of reliability of the prediction result, the information processing device performs display control with respect to the alarms.

Abstract: An information processing apparatus (1) includes first modules (20) including an arithmetic circuit (22) configured to perform a predetermined calculation, and a plurality of second modules (30) capable of having at least one of the first modules (20) connected thereto in parallel and capable of being connected in series with each other by a serial bus (51).

Abstract: An electric field sensor which measures an electric field generated by a target utilizing an electro-optic effect, the electric field sensor including a light source, an electro-optic crystal on which light in a predetermined polarization state emitted from the light source is incident and which is subjected to the electric field generated by the target, a reference electric field applicator configured to apply an electric field based on a reference signal with a known signal level to the electro-optic crystal, a light receiver configured to receive light emitted from the electro-optic crystal and to convert the received light into an electric signal, and a separation corrector configured to separate the electric signal into a measurement signal based on the electric field generated by the target and the reference signal and to correct a signal level of the measurement signal on the basis of the signal level of the separated reference signal.

Abstract: A method comprises identifying an alarm event pattern within a log of alarm events that occur within a process control system, determining that a current alarm event within the process control system belongs to the alarm event pattern, determining one or more actions for resolving the current alarm event based on the alarm event pattern, and implementing the one or more actions to resolve the current alarm event.

Abstract: Provided is a measurement data recording apparatus including: an acquisition portion configured to acquire time-series measurement data obtained by measuring a state of a target; a recording portion configured to record the acquired measurement data; a measurement data transmission portion configured to transmit the measurement data recorded in the recording portion to a generation apparatus configured to generate a determination model for determining a quality of the state of the target; a model reception portion configured to receive the determination model generated by the generation apparatus; and a determination portion configured to determine the quality of the state of the target from newly acquired measurement data using the received determination model.

Abstract: A measurement device includes: a container into which sample gas is to be injected; a liquefaction mechanism configured to liquefy the sample gas in the container; a near-infrared probe extending from inside to outside the container; and a near-infrared measuring instrument configured to measure an absorbance spectrum of the sample gas in a state of being liquefied by the liquefaction mechanism, via the near-infrared probe.

Abstract: A signal processing device (10) according to the present disclosure includes a housing (161), an input interface (12) configured to receive input of an electrical signal, a converter (13) configured to convert the electrical signal inputted to the input interface (12) into a communication signal according to a communication protocol for wireless communication, and an output interface (14) configured to output the communication signal converted by the converter (13) for wireless communication. The signal processing device (10) includes the housing (61), the input interface (12), the converter (13), and the output interface (14) integrally. The input interface (12) is disposed on a first side (S1) of the housing (161), and the output interface (14) is disposed on a second side (S2) opposite the first side (S1) in the housing (161).

Abstract: Provided is a monitoring device including: a captured image acquiring unit configured to acquire an image captured by a monitoring camera; a monitoring logic execution unit configured to generate a monitoring result corresponding to the image captured by the monitoring camera, by using a trained monitoring logic; an image transmitting unit configured to decimate the image captured by the monitoring camera and transmit a result to a learning apparatus performing training processing on another monitoring logic of a same type as the monitoring logic; a monitoring logic receiving unit configured to receive, from the learning apparatus, the other monitoring logic additionally trained by the learning apparatus by using the image from the image transmitting unit; and an updating unit configured to update the monitoring logic executed by the monitoring logic execution unit to the other monitoring logic received by the monitoring logic receiving unit.

Abstract: A work assistance system includes a storage storing work data for each of a plurality of devices, the work data indicating work performed to maintain the plurality of devices, a setter configured to set at least one attribute among a plurality of prescribed attributes with respect to the work data stored in the storage, an extractor configured to interpret the attribute set in the work data and to extract work data in which a specific attribute is set, and a provider configured to provide the work data extracted by the extractor.

Abstract: A booster circuit includes a boost converter configured to boost an input voltage and performs feedback control such that an output voltage becomes a set value on the basis of a voltage applied to a feedback terminal and an internal feedback reference voltage, a power supply unit configured to generate a reference voltage with a smaller error than the feedback reference voltage, and a control unit configured to compare a voltage corresponding to the output voltage of the boost converter with the reference voltage, and configured to output a control signal indicating a comparison result to the feedback terminal of the boost converter.

Abstract: Methods and apparatus for analyzing optical measurements to determine whether a liquid includes dissolved oxygen, to determine a predicted concentration of the dissolved oxygen in the liquid, and/or to determine additional or alternative feature(s) related to dissolved oxygen in the liquid. An optical source can be controlled to emit optical radiation into a container that contains the liquid. The optical source can be located outside of the container, and the optical radiation includes (e.g., is restricted to) radiation that conforms to a dissolved oxygen absorption band. The optical radiation can be pulsed or can be periodically intensity modulated. A photodetector, located outside of the container but in optical communication with the interior of the container, can generate the optical measurements used in the analysis.

Abstract: A current output module includes a current output section configured to output a current, an AD conversion circuit configured to convert a detection voltage, which is a voltage according to the current output from the current output section, into a digital value, a controller configured to control a current output from the current output section on the basis of the digital value of the detection voltage output from the AD conversion circuit, and a reference voltage generator configured to generate a plurality of reference voltages. The controller includes a processor configured to cause the AD conversion circuit to convert each of the plurality of reference voltages into a digital value, and a corrector configured to calibrate the AD conversion circuit on the basis of each digital value obtained by conversion of the plurality of reference voltages.

Abstract: A control system includes at least one field device, a first control apparatus, a second control apparatus, a cache server, and a network. The first control apparatus has a first field device directly connected thereto and includes a first access route controller and a first control application capable of controlling the first field device. The second control apparatus includes a second access route controller and a second control application capable of controlling the first field device. The cache server includes a memory and a third access route controller. The first through third access route controllers are configured to work together to be capable of transferring, to the cache server, an input/output instruction for the first field device from the second control application.

Abstract: A magnetic detection apparatus includes a core to which magnetism to be detected is applied, an exciter configured to excite the core with an excitation signal, a detector configured to detect induced voltage according to a time change of magnetic flux generated by the core, a wave detector configured to detect a wave from a signal corresponding to the induced voltage by using a detection signal corresponding to the excitation signal and to generate a signal according to the magnetism to be detected, and a signal converter configured to generate and output to the exciter an excitation signal that has a spread spectrum of a signal having an excitation frequency and to generate and output to the wave detector a detection signal that has a spread spectrum of a signal having a detection frequency of twice the excitation frequency.

Abstract: A magnetic detection apparatus according to the present disclosure includes a magnetic sensor and a measurement apparatus. The magnetic sensor includes a first transmission line and a second transmission line arranged to be non-parallel to each other. The measurement apparatus includes a signal generator configured to generate a first incident wave and a second incident wave, a signal detector configured to detect a first reflected wave caused by an impedance mismatch of the first transmission line and a second reflected wave caused by an impedance mismatch of the second transmission line, and a controller. The controller calculates a first magnetic field based on the first incident wave and the first reflected wave and a second magnetic field based on the second incident wave and the second reflected wave and calculates a biaxial magnetic field based on the first magnetic field and the second magnetic field.

Abstract: A current detection apparatus (10) according to the present disclosure includes an annular magnetic core (13), a first coil group (14) including a plurality of first coils (La) connected in series, a second coil group (15) including a plurality of second coils (Lb) connected in series, and a detector (12). The first coil group (14) and the second coil group (15) are connected in parallel between a first node (21) and a second node (22), a count of the plurality of first coils (La) and a count of the plurality of second coils (Lb) are identical, and a first coil (La), among the plurality of first coils (La), in ith place from the first node (21) and a second coil (Lb), among the plurality of second coils (Lb), in ith place from the first node (21) are arranged at opposing positions, where i is an integer.