CN2055603U - 超窄带甚低频式探测器寻的头 - Google Patents

超窄带甚低频式探测器寻的头 Download PDF

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CN2055603U
CN2055603U CN 89209589 CN89209589U CN2055603U CN 2055603 U CN2055603 U CN 2055603U CN 89209589 CN89209589 CN 89209589 CN 89209589 U CN89209589 U CN 89209589U CN 2055603 U CN2055603 U CN 2055603U
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vlf
ferrite core
coil winding
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narrow band
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罗洪发
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Abstract

一种在中空的探杆前端部,容装铁淦氧磁芯线圈绕组,探杆前端部还固结底边与铁淦氧磁芯线圈绕组平行的等腰直角三角形定角器寻的头。配合VLF正弦场源发生器和VLF超窄带接收机组成探测器,可探出埋深50米,直径5cm以上,长度9m以上的金属导体。并且对金属矿脉——铜、铅、锌、铁的硫化物、含自然金等矿床的埋藏与走向也较敏感。

Description

本实用新型涉及一种超窄带甚低频式探测器寻的头,主要用于探测埋藏地下的各种导体,如输水、输气管路,动力及通信电缆等,属于检测仪器。
标示地下管网铺设位置的城建设计资料,随着时间的推移,大多散失不全,这无疑给市政建设带来很大困难。开挖基槽时,往往发生输水(气)管路被碰破。并且在发生泄露事故时,因找不到准确位置,对堵塞、锈损的管线无法进行必要的维修。
本实用新型的目的,即是提供一种用于探测地下埋藏的输水,输气管网、各类电缆的具体位置及深度的超窄带甚低频式探测器寻的头。
根据埋藏地下全属管网的电性能参数与周围的土壤和围岩介质相比,一般差出几个数量级,在导电性能上可认为是人工埋设的良导体。并且,任何导体,当有交变电流通过时,周围则产生交变磁场的机理。如果将一线圈与地面呈45°夹角放置于该磁场中,则线圈两端电势为:E45°=K·(X-Y)·cosωt/[ ·(X2+Y2)]这里K是比例常数,X为埋藏导体到线圈的水平距离,Y为埋藏深度。当X=Y时,E45°=0。即线圈两端电势为零时,线圈与埋藏导体的水平距离也是被探测导体的埋藏深度。如果将线圈水平放置时,则有E水平K·Y·cosωt/(X2+Y2)。该公式表明当线圈在埋藏导体所衍生的交变磁场正上方点作水平移动时,只有当线圈扫过地下导体正上方点时,感应电压最大。据此公式,可根据线圈水平移动时,E水平最大点及其延续,确定导体的埋藏位置及走向。
根据上述机理,本实用新型提供的超窄带甚低频式探测器寻的头,采用如下技术措施来实现其发明目的。
在中空的探杆前端部,容装铁淦氧磁芯线圈绕组,同时,探杆前端部还固结底边与铁淦氧磁芯线圈绕组平行的等腰直角三角形定角器。铁淦氧磁芯线圈绕组引出线,从探杆导出后,接于电缆    插头。
寻的头中的铁淦氧磁芯线圈接于VLF接收机谐振回路,构成该谐振回路中电感,再与配置的VLF正弦场源发生器,组成探测器。
VLF正弦场源发生器,产生VLF频段的恒频交变电流。可利用辐射感应法、传导追脉法或者偶极振子供电法等与负载(埋藏导体)配接。寻的头则检出VLF正弦场源发生器使埋藏导体衍生的恒频交变电磁场信号,然后经接收机电路处理,再分别以表头指针和音响信号指示出地下埋设导体的具体位置,深度及走向。
使用本结构的寻的头,配合VLF正弦场源发生器和VLF超窄带接收机组成的探测器,可探测出埋深50米以内,直径5cm以上,长度9M以上的金属导体。对金属矿脉--铜、铅、锌、铁的硫化物、含自然金物质矿床的埋藏与走向也较敏感。
附图是本实用新型构造示意图。其中,图1是超窄带甚低频式探测器寻的头的结构示意图,图2是VLF正弦场源发生器电路原理图,图3是VLF超窄带接收机电原理图。下面结合附图,进一步描述寻的头最佳实施例技术特征。
寻的头是一个中空的探杆。其前端部容装铁淦氧磁芯线圈绕组(1)、同时探杆前端部还固结底边与铁淦氧磁芯线圈绕组(1)平行的等腰直角三角形定角器(2),线圈绕组引出线(4),从探杆(3)的另一端引出,接于电缆插头(5)。
本实施例中,铁淦氧磁芯采用φ10×(120-160)的锰锌制品、线圈采用φ0.32高强度漆包线分段双层密绕140-180匝,浸腊防潮。探杆采用环氧胶木管或硬质塑料,定角器由厚5-15mm任意绝缘板材制成。

Claims (2)

1、一种超窄带甚低频式探测器寻的头,其特征为在中空的探杆前端部,容装铁淦氧磁芯线圈绕组,探杆前端部还固结底边与铁淦氧磁芯线圈绕组平行的等腰直角三角形定角器,铁淦氧磁芯线圈绕组引出线,接于电缆插头;
2、根据权利要求1所述的超窄带甚低频式探测器寻的头,其特征为线圈采用分段双层密绕140-180匝,铁淦氧磁芯采用φ10×(120-160)锰锌制品。
CN 89209589 1989-10-10 1989-10-10 超窄带甚低频式探测器寻的头 Withdrawn CN2055603U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102141197B (zh) * 2010-01-28 2013-03-20 杨志雄 探索管内路径走向的测量设备
CN107145081A (zh) * 2017-06-27 2017-09-08 北京仿真中心 一种空馈式低频寻的半实物仿真试验方法及系统

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102141197B (zh) * 2010-01-28 2013-03-20 杨志雄 探索管内路径走向的测量设备
CN107145081A (zh) * 2017-06-27 2017-09-08 北京仿真中心 一种空馈式低频寻的半实物仿真试验方法及系统
CN107145081B (zh) * 2017-06-27 2020-08-14 北京仿真中心 一种空馈式低频寻的半实物仿真试验方法及系统

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