Title:
振動センサ、外部環境検出装置
Document Type and Number:
Japanese Patent JP5862310
Kind Code:
B2
Abstract:
With the relative positional change between a first substrate and a second substrate due to an external vibration, the positional relationship between an electret group and an electrode group changes, as a result of which a vibration sensor outputs the detection signal of the external vibration. The electrode group is divided into two or more predetermined number of phases, and small electrode groups are formed that can generate electric signals in response to the external vibration on a per-phase basis. In the electrode group, a phase difference generation gap that generates predetermined phase differences between the respective electrical signals generated in the small electrode groups is provided between adjacent electrodes included in the electrode group, according to the predetermined number of phases. The vibration sensor outputs, as the detection signal of the external vibration, a signal formed by superimposing the electric signals generated in the small electrode groups as a result of the relative positional change between the first substrate and the second substrate due to the external vibration. This provides a highly simple and convenient vibration sensor for detecting an external vibration by use of electrets.
More Like This:
| WO/2020/258174 | VIBRATION SENSOR AND AUDIO DEVICE |
| WO/2014/025304 | A MULTI-PURPOSE MONITORING SYSTEM SUITABLE FOR NATURAL DISASTER ALARMS |
| JP3451593 | SOLID STATE CONDENSER AND MICROPHONE DEVICE |
Inventors:
Tatsuaki Masaki
Toru Yokoyama
Keiki Matsuura
Toru Yokoyama
Keiki Matsuura
Application Number:
JP2012002545A
Publication Date:
February 16, 2016
Filing Date:
January 10, 2012
Export Citation:
Assignee:
OMRON Corporation
International Classes:
G01H11/06; H04R11/04
Domestic Patent References:
| JP2011221002A | ||||
| JP201081724A |
Foreign References:
| WO2009123022A1 |
Attorney, Agent or Firm:
Kazunobu Sera
Mayuko Wakuda
Takeshi Nakamura
Mayuko Wakuda
Takeshi Nakamura