Technique for minimizing loss of sensitivity of buried pressure responsive devices
    1.
    发明授权
    Technique for minimizing loss of sensitivity of buried pressure responsive devices 失效
    降低埋地压力敏感装置灵敏度损失的技术

    公开(公告)号:US3890613A

    公开(公告)日:1975-06-17

    申请号:US39835073

    申请日:1973-09-18

    CPC classification number: E02D31/00 G08B13/20

    Abstract: A controlled application of an anti-freeze ingredient to soil covering a buried pressure responsive device such as an intrusion detector, eliminates reduction in sensitivity of the device due to frozen soil conditions. An alternate technique for avoiding frozen soil conditions consists of providing a thermal insulating enclosure for the soil between the ground surface and the pressure responsive device.

    Abstract translation: 将防冻成分控制施加到覆盖埋入式压力响应装置(例如入侵检测器)的土壤中,消除了由于冻土条件导致的装置的敏感性的降低。 用于避免冻土状况的替代技术包括为地表和压力响应装置之间的土壤提供绝热外壳。

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