Title:
マルチラインセンサ
Document Type and Number:
Japanese Patent JP6663240
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the function of a monitoring system from being impaired even when it is affected by a height pattern and eliminate a dead zone due to a narrow Fresnel zone, as well as eliminate a false report, etc., without using diode detection that is susceptible to a foreign wave.SOLUTION: A multiline sensor of the present invention includes sensor units F1-F5 (group A) provided at different heights and using mutually different frequencies and sensor units F6-F10 (group B) provided at different heights and using mutually different frequencies, the sensor units F1-F5 being arranged in the same line as the F6 and F10 that face them. The sensor units F1-F5 are provided with a transmitter for transmitting in a forward direction and a receiver for receiving in a reverse direction, and the sensor units F6-F10 are provided with a transmitter for transmitting in a reverse direction and a receiver for receiving in a forward direction. For reception in each sensor unit, a per-line set frequency range Fk for discriminating between a received signal and an image signal is provided, and an offset frequency Fof is set between the groups.SELECTED DRAWING: Figure 1
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Inventors:
Toshihiko Sasahara
Application Number:
JP2016025655A
Publication Date:
March 11, 2020
Filing Date:
February 15, 2016
Export Citation:
Assignee:
New Japan Radio Co., Ltd.
International Classes:
G01V3/12; G01S13/04
Domestic Patent References:
| JP56029790A | ||||
| JP57017877A | ||||
| JP50047597A | ||||
| JP2014215102A | ||||
| JP3124296U | ||||
| JP2010122968A | ||||
| JP63163594U | ||||
| JP2009268074A | ||||
| JP2010276416A |
Foreign References:
| WO1994029755A1 |
Attorney, Agent or Firm:
Yasuto Ogata