双曲线定位法是通过测定待定点到至少三个已知点的两个距离差所进行的一种无线电定位.通过船(待定点)接收到三个发射台的电磁波的时间差计算出距离差,两个距离差即可形成两条位置双曲线,两者相交便可确定船位.我们来看一种简单的“特殊”状况;如图所示,已知三个发射台分别为
,
,
且刚好三点共线,已知
海里,
海里,现以
的中点为原点,
所在直线为
轴建系.现根据船
接收到
点与
点发出的电磁波的时间差计算出距离差,得知船
在双曲线
的左支上,根据船
接收到
台和
台电磁波的时间差,计算出船
到
发射台的距离比到
发射台的距离远30海里,则点
的坐标(单位:海里)为( )
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445448772091904/2447746239995904/STEM/93ddef3a28c94f599697befe929a2f55.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2483d1d7eddec15dcc6836b84849d0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0566be94b1ed3e5d250ca530eeb529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba95292c9f08f0ce7960c082036ca19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445448772091904/2447746239995904/STEM/93ddef3a28c94f599697befe929a2f55.png?resizew=194)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2020-04-23 16:55:23
|
【知识点】 双曲线的其他应用
相似题推荐
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(0.65)
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解题方法
【推荐1】已知双曲线
的右焦点到其中一条渐近线的距离等于
,抛物线
的焦点与双曲线
的右焦点重合,则抛物线
上的动点
到直线
和
的距离之和的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632cf43ce1c58101377acaacc005a7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f2b218675cf6bcce95bb65d65bb9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4e70ad712d8d6e2066e38093ad732e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41ccf22ae1da0f62c6e36e724cb4382.png)
A.1 | B.2 | C.3 | D.4 |
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适中
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【推荐2】设不等式
的解集为
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c785c8fa4de4d56c408f872cc8405556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
A.5 | B.![]() | C.6 | D.7 |
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