Title:
【発明の名称】地上2次方式LIMにおけるLIM1次側の非接触型温度検知器
Document Type and Number:
Japanese Patent JPH0820313
Kind Code:
B2
Abstract:
PURPOSE:To perform accurate and stable operation by embedding a thermal switch (THSW) in a linear motor (LIM) device. CONSTITUTION:The THSW 12 which detects temperature variation is embedded in the LIM mounted on a moving carriage 1 and connected to a receiving head 10 provided to the carriage 1. Then, the magnetic resonance between the head 10 and a detection head 16 is caused by the coupling between their provided coils by magnetic flux and a resonance circuit as a detector on a ground side for the head 10 consists of the head 16 and terminals T1 and T2. In a normal state, the THSW 12 is on and the quality (Q) of the resonance circuit decreases owing to the loss of the head 10. Then the THSW 12 is normally closed and open in case of temperature abnormality and when the THSW 12 is open owing to the temperature abnormality, its resistance is zero and the Q of the resonance circuit increases. This variation in the Q is amplified by a detecting circuit 11 and compared by a comparator with a specific value to detect the tempera ture variation of the LIM accurately, thereby precluding burning.
Inventors:
Tsutomu Shintani
Application Number:
JP13933386A
Publication Date:
March 04, 1996
Filing Date:
June 17, 1986
Export Citation:
Assignee:
Shinko Electric Co., Ltd.
International Classes:
G01K13/04; G01K1/02; (IPC1-7): G01K1/02; G01K13/04
Domestic Patent References:
| JP57198837A | ||||
| JP5414288A |
Attorney, Agent or Firm:
Takeo Goto (1 person outside)
Next Patent: 電子温度計