Title:
HIGH-FREQUENCY TYPE REMOTE SENSOR CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3520051
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To quickly stabilize driving power wirelessly-transmitted from a base part to a remote part, regardless of the load variations, etc.
SOLUTION: An oscillation drive part 15 in the base part 13 transmits a high-frequency signal for a PWM power source of a predetermined duty ration from a resonance circuit 19 to the outside. In the remote part 23, a high-frequency signal for the PWM power source is induced, and drive power is produced. The remote part 23 multiplies the deviation of the drive power from a reference power by a proportional gain, a first correction value (a) is formed, and deviation of a measured value form a measured value obtained last time is multiplied by a differential gain, and a second correction value (b) is formed. A control correction value is formed from these correction values (a), (b), and a control high-frequency signal is modulated by this value, and is transmitted to the outside. The base part detects the control correction value from the control high-frequency signal, and on the basis of this, the duty ratio of the high-frequency signal for a PWM power source is variedly controlled.
Inventors:
Shimura, Masayuki
Gonda, Yoshiaki
Gonda, Yoshiaki
Application Number:
JP2001017956A
Publication Date:
April 19, 2004
Filing Date:
January 26, 2001
Export Citation:
Assignee:
NIPPON BARUUFU KK
International Classes:
G08C19/12; H02M3/28; H04Q9/00; (IPC1-7): H02M3/28; G08C19/12; H02J17/00; H04Q9/00
Attorney, Agent or Firm:
斎藤 美晴