Patents Assigned to Yokogawa Electric Corporation
  • Patent number: 10353009
    Abstract: A secondary battery capacity measuring system that estimates maximum capacities of other cells using characteristics of a deteriorated cell even when a charging process in the deteriorated cell having a smaller maximum capacity than the other cells in cells constituting a battery module ends and data for measuring the maximum capacities of the other cells cannot be acquired is provided.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: July 16, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Soichiro Torai, Satoshi Yoshitake, Masahiro Kazumi, Masaru Nakagomi
  • Patent number: 10345231
    Abstract: A signal detection device according to one aspect of the present invention includes a receiver configured to receive a signal including at least a first signal component modulated by a first frequency and a second signal component modulated by a second frequency, and a detector configured to generate, using a base signal, a first reference signal to be used for detecting the first signal component and a second reference signal to be used for detecting the second signal component, perform lock-in detection on the signal received by the receiver using the first reference signal to obtain a first detection signal, perform lock-in detection on the signal received by the receiver using the second reference signal to obtain two second detection signals having different phases from each other, and change at least one of a frequency and a phase of each of the first and second reference signals to set one of the two second detection signals to zero.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: July 9, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Kazuki Setsuda, Naomichi Chida, Kazufumi Nishida
  • Patent number: 10345341
    Abstract: An excitation core includes a first strip-shaped magnetic substance and a second strip-shaped magnetic substance. The first strip-shaped magnetic substance has both ends mutually overlapped with and mutually in contact with both ends of the second strip-shaped magnetic substance in a thickness direction. A sensor head includes this excitation core and a magnetism collecting body. This magnetism collecting body includes strip-shaped first magnetism collector and second magnetism collector. Both ends of the first magnetism collector and both ends of the second magnetism collector are in contact with one another to form the annular magnetism collecting body. This magnetism collecting body is disposed at an inside or an outside of the reinforcing body.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: July 9, 2019
    Assignees: Yokogawa Electric Corporation, Yokogawa Test & Measurement Corporation
    Inventors: Takanobu Shinagawa, Kiyoshi Yokoshima
  • Patent number: 10339018
    Abstract: A redundancy device which is configured to communicate with a redundancy opposite device and perform a redundancy execution, the redundancy device includes receivers configured to receive individually HB signals transmitted from the redundancy opposite device, a calculator configured to calculate a number of normal communication paths among communication paths of the HB signals based on a reception result of the receivers, a comparator configured to compare a calculation result of the calculator with a predetermined threshold value, and a changer configured to change the redundancy device from a standby state to an operating state, or change the redundancy device from the standby state to a not-standby state in which the redundancy execution is released, based on the calculation result of the calculator and a comparison result of the comparator.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: July 2, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Takeshi Ohno, Nobuaki Ema
  • Publication number: 20190195731
    Abstract: An optical fiber characteristics measuring apparatus includes: a light source that outputs frequency-modulated continuous wave of light; a first optical branching unit that branches the continuous light into pump light and reference light; a second optical branching unit that outputs backscattered light generated by making the pump light incident from one end of an optical fiber to be measured, wherein the backscatterd light is Brillouin scattering in the optical fiber; a detector that detects interference light of the backscattered light and the reference light; a measuring unit that measures characteristics of the optical fiber by using a detection signal output from the detector; and a controller that controls the light source to change modulation frequency of the continuous light in units of one period or half a period of a modulation period corresponding to the modulation frequency.
    Type: Application
    Filed: December 27, 2018
    Publication date: June 27, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Osamu Furukawa
  • Patent number: 10331090
    Abstract: An information processing system includes a state data acquisition device configured to acquire state data indicating an operation state of a plant, a first classification device configured to generate a determination line used to classify the state data, a mirror image data generation device configured to generate mirror image data obtained by mirroring the acquired state data using the generated determination line, and a second classification device configured to generate a determination model on the basis of the state data and the generated mirror image data.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: June 25, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Go Takami, Hiroaki Kanokogi
  • Patent number: 10321492
    Abstract: A wireless communication apparatus for performing wireless communication between wireless devices via a wireless communication network, wherein the wireless communication apparatus comprises: a packet processor for generating a first packet including first control information and discrimination information for discriminating between the first control information for connecting to the wireless communication network a set wireless device, which is a wireless device for which the setting of instrument information required for accessing the wireless communication network has been performed, and second control information for connecting to the wireless communication network a setting-required wireless device, which is a wireless device for which there is a need to set instrument information, and a second packet including the discrimination information and the second control information; and a wireless communication unit for transmitting the first packet and the second packet generated by the packet processor to th
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: June 11, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Yukiyo Akisada, Kazunori Miyazawa, Yasuki Sakurai
  • Patent number: 10317855
    Abstract: A system, method, and an apparatus relating to data collection regarding valve movement over a period of time in order to determine the effects of stiction on the valve. With data collection done over a period of time, it is possible to remove dependency on a high speed method of data collection. The evaluation of the valve movement includes consideration of a manipulated variable (MV) for diagnosis, or detection, of stiction of the valve.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: June 11, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Angelo Basa Florentino, Prakash Mariappan
  • Publication number: 20190171194
    Abstract: A method to be performed in a production support system configured to process a raw material and to produce a product. And the method includes: acquiring a plurality of element values relating to production elements of the product; determining whether the element values are within allowable ranges in which a quality of the product meets a predetermined allowed quality; resetting the allowable ranges of one or a plurality of other element values to the allowable ranges in which the quality of the product meets the predetermined allowed quality, upon determining that at least one element value exceeds the allowable range; and outputting information about the reset allowable ranges.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 6, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Keiji Sato, Noboru Wakiyama, Ryoichi Himono, Ichiro Tsubota
  • Patent number: 10310869
    Abstract: A process control apparatus includes a virtualization unit configured to operate in hardware, first and second operating systems configured to run in the virtualization unit, an application configured to run in the first operating system, and configured to control an industrial process by communicating with field devices, a recording unit configured to record a first information required for restoration of the application and a second information passed between the first operating system and the application, and a restoration unit configured to use a history of the second information to set the second operating system to the same state as the internal state of the first operating system, and configured to use the first information to restore the application running in the first operating system into the second operating system.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: June 4, 2019
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Masanobu Tsuchiya, Takeshi Ohno
  • Publication number: 20190163597
    Abstract: A device management apparatus includes: a memory that stores device individual information including information about a current state of a device, wherein the device individual information is unique to the device; and a processor that receives information about an action for the device from an external terminal apparatus, derives a subsequent state of the device based on the current state and the action for the device by referring to a definition of a predefined state transition, and causes a transition from the current state to the subsequent state.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Junpei Shibamura
  • Publication number: 20190164102
    Abstract: An operational improvement effect calculation method includes: retrieving, from inputted plant operation data relating to operations of a plant, comparison target plant operation data which includes more than one plant operation data points similar to a plant operation indicated by evaluation target plant operation data which is plant operation data of an evaluation target; calculating a post-improvement evaluation indicator based on the evaluation target plant operation data and a pre-improvement evaluation indicator based on each of the comparison target plant operation data; calculating a confidence interval, based on each data point of the comparison target plant operation data; calculating a baseline, which is a reference when comparing the post-improvement evaluation indicator and the pre-improvement evaluation indicator and corresponds to the pre-improvement evaluation indicator, based on the confidence interval; and calculating an evaluation result on the plant, based on the post-improvement evaluatio
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Tomohiro Kuroda, Mitsunori Fukuzawa, Ken'ichi Kamada
  • Patent number: 10305793
    Abstract: A communication device conforming with plural communication standards and having a storage storing a plurality of virtual stacks each having an application program and communication program that implements a protocol stack for communication by the application program. An executor executes the virtual stacks, and a switching controller switches the virtual stacks to be executed by performing a first processing in which at least one part of at least one of the virtual stacks is read from storage and stored into a memory of, and executed by, the executor. Then, in accordance with free capacity in the memory, at least one part of at least one of the virtual stacks executed in the first processing is deleted from memory. In a second processing at least one part of at least one of the virtual stacks is read from the storage and stored into the memory of, and executed by, the executor.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: May 28, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Nobuo Okabe, Yukiyo Akisada, Kazunori Miyazawa, Yasuki Sakurai
  • Publication number: 20190159028
    Abstract: A setting system including a portable medium having recorded therein setting information generated by a management apparatus that manages a wireless network and necessary for a wireless device that joins the wireless network, and a setting apparatus that acquires the setting information from the portable medium and sets the acquired setting information in the wireless device.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 23, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Osamu Ito
  • Patent number: 10298174
    Abstract: A photoelectric conversion element evaluation apparatus includes: a probe light source that irradiates a photoelectric conversion element as the object of measurement with probe light; a pump light source that irradiates the photoelectric conversion element being irradiated with the probe light with pulsed pump light; and a light receiving element that detects time dependency of a change in an amount of the probe light obtained from the photoelectric conversion element.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: May 21, 2019
    Assignee: Yokogawa Electric Corporation
    Inventors: Akishige Ito, Masato Ishikawa, Takashi Tsubota, Yoshinori Matsumoto
  • Publication number: 20190145801
    Abstract: A measuring apparatus includes a base portion attachable to an attachment target object and a cover portion configured to be detachably S attached to the base portion to accommodate a rod-shaped replaceable object inside the cover portion, and the cover portion includes a holding portion configured to hold the replaceable object with the cover portion attached to the base portion.
    Type: Application
    Filed: October 17, 2018
    Publication date: May 16, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Keiichi Sasaki
  • Publication number: 20190147725
    Abstract: Radio equipment includes a substrate on which a first antenna for near field communication is provided, a base portion on which the substrate is erected, and a cover portion configured to be attached to the base portion so as to cover the substrate. The cover portion includes an opposing portion configured to oppose the first antenna and a non-opposing portion disposed closer to the base portion than the opposing portion in a direction in which the substrate is erected. A distance from an outer surface of the cover portion to the substrate at the opposing portion is shorter than a distance from the outer surface of the cover portion to the substrate at the non-opposing portion.
    Type: Application
    Filed: October 16, 2018
    Publication date: May 16, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Kenji Katori, Keiichi Sasaki, Daisuke Kaneko
  • Publication number: 20190136998
    Abstract: A valve opening and closing system includes: a site/center switching manual valve; a manual valve for opening and closing operation; an opening/closing switching electric driving valve that opens and closes a manual valve and that nullifies the manual valve for opening and closing operation; a center wireless transmitter that accepts and transmits an operation instruction including an opening and closing operation instruction and a forced closing operation instruction; and a site wireless transmitter, and a contact signal converter, the site side valve control device transmits both of the opening and closing operation instruction and the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to the center control side, and interrupts the opening and closing operation instruction and transmits the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to on site.
    Type: Application
    Filed: January 26, 2017
    Publication date: May 9, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Hitoshi SAITO, Noriharu FUNAKI, Yuu NAKAJIMA
  • Patent number: 10282270
    Abstract: A diagnostic method of diagnosing a type of a field device, includes: setting a plurality of connection units included in an I/O module to be in a state of being capable of inputting or outputting a hybrid signal which is an analog signal having a digital signal superimposed thereon, the connection units being connected to the field device and capable of inputting the hybrid signal, outputting the hybrid signal, inputting a digital signal, and outputting a digital signal; and diagnosing the type of the field device which is connected to the connection units of the I/O module, based on the digital signal included in the hybrid signal obtained through the connection units.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: May 7, 2019
    Assignee: Yokogawa Electric Corporation
    Inventor: Soichiro Konada
  • Patent number: 10274358
    Abstract: A first detection electrode that outputs a first flow rate signal and a second detection electrode that outputs a second flow rate signal, a differential circuit that outputs a differential flow rate signal obtained by obtaining a difference between the first flow rate signal and the second flow rate signal, an AC signal generation circuit that causes a first AC current to flow between the first detection electrode and the ground electrode and causes a second AC current with a reverse phase at the same frequency as that of the first AC current to flow between the second detection electrode and the ground electrode, and a diagnosis unit that diagnoses an abnormality of at least either of the first detection electrode or the second detection electrode based on a differential flow rate signal.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: April 30, 2019
    Assignee: Yokogawa Electric Corporation
    Inventor: Toru Shimura