Patents by Inventor Hirohumi Hirayama

Hirohumi Hirayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Controller having PID selection function
    Patent number: 6738676
    Abstract: A controller (1) has a fuzzy calculation means (64) for performing a fuzzy calculation in order to calculate a PID value (P, I, D) based on a switch time T, a PID value (P1, I1, D1) before switching of the PID value, and a PID value (P2, I2, D2) after the switching. The switch time T is obtained by manual through the switch time input means (7) or by calculating it automatically. The PID value (P1, I1, D1) is stored in a PID value storage means (62), and the PID value (P2, I2, D2) is stored in a PID value storage means (63).
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: May 18, 2004
    Assignee: Yamatake Corporation
    Inventor: Hirohumi Hirayama
  • Controller having PID selection function
    Publication number: 20030144749
    Abstract: A controller (1) has a fuzzy calculation means (64) for performing a fuzzy calculation in order to calculate a PID value (P, I, D) based on a switch time T, a PID value (P1, I1, D1) before switching of the PID value, and a PID value (P2, I2, D2) after the switching. The switch time T is obtained by manual through the switch time input means (7) or by calculating it automatically. The PID value (P1, I1, D1) is stored in a PID value storage means (62), and the PID value (P2, I2, D2) is stored in a PID value storage means (63).
    Type: Application
    Filed: January 14, 2003
    Publication date: July 31, 2003
    Inventor: Hirohumi Hirayama
  • Controller for controlled variables and control system for the same
    Publication number: 20030130750
    Abstract: A PID operating unit inputs a value obtained by subtracting a setting value stored in a setting value memory from a measured value (temperature) of a controlled device and outputs controlled variable information in order to control the controlled device by proportional plus integral plus derivative action. A time-proportioning outputting unit converts this controlled variable information into an ON/OFF signal for switching an ON/OFF state of a switch of a heater in the controlled device in accordance with the controlled variables and feeds the ON/OFF signal to the heater and to an output selecting unit.
    Type: Application
    Filed: January 3, 2003
    Publication date: July 10, 2003
    Inventor: Hirohumi Hirayama