２０１５．１０．１４
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新製品の紹介（プチ連載です）
周波数カウンタ組立キット
〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜
たまにはちょいと息抜きで小品も作ってみたいものです。
簡単にチョイチョイと…。
でも、なかなかそうは簡単にはいかなくて、いつものごとく回を重ねてしまうことになるのかも…。
〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜


［第２５回］


●ＧＰＳで１ＰＰＳを（１３）２７μＨのコイルを自作する

前回からの続きです。
せっかくここまで理解が進んだのですから、ＵｂｌｏｘのＨａｒｄｗａｒｅ　Ｍａｎｕａｌで指定されている２７ｎＨのインダクタを自作してみることにしました。

つまようじの太さを測りました。

直径２．２ｍｍです。
インチに換算すると２．２／２５．４≒０．０８６６です。
この値と適当な長さ、巻数を前回ご紹介しましたＡｉｒ　Ｃｏｒｅ　Ｉｎｄｕｃｔａｎｃｅ　Ｃａｌｃｕｌａｔｏｒのサイトに入力してカットアンドトライで２７ｎＨになるような値を求めました。


長さが０．３９３７インチ（１０ｍｍ）で巻数が８回にすると大体２７ｎＨ近くになりましたので、この値でいくことにしました。

８回巻いて長さが１０ｍｍになるように調節します。


つまようじを抜けばコイルの出来上がりです。


ＧＰＳ基板に取り付けました。


●受信したデータです

受信したデータはＵＳＢケーブルを介してＴｅｒａ　Ｔｅｒｍで受けて表示しました。
Ｔｅｒａ　Ｔｅｒｍは［第２１回］で紹介いたしました。
ちょっと長いですが受信開始から位置情報が表示されるまでをお見せします。
ＧＰＳ基板をＵＳＢケーブルでＷｉｎｄｏｗｓ７パソコンに接続して、ＧＰＳ基板の電源を入れてからＴｅｒａ　Ｔｅｒｍを起動しました。
時刻情報はすぐに表示されています。
０６３１２７．４４が最初に表示された時刻（０６時３１分２７秒）です。
午後３時半（１５時３０分）頃でしたから、この表示時刻はグリニッジ標準時のようです（日本標準時＝グリニッジ標準時＋０９：００）。
［２０１５．１２．１追記］ＧＰＳの時刻はセシウム原子時計をもとに決定される時刻で、グリニッジ標準時（今は協定世界時ＵＴＣというようです）とは若干のずれ（約１５秒）があるのだそうです。
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$GPGNS,063153.00,,,,,NN,02,5.51,,,,*7C
$GPGGA,063153.00,,,,,0,02,5.51,,,,,,*57
$GPGSA,A,1,05,02,,,,,,,,,,,5.60,5.51,1.00*04
$GPGSV,2,1,05,02,65,328,34,05,43,279,39,07,,,21,13,,,31*70
$GPGSV,2,2,05,16,,,16*7C
$GPGLL,,,,,063153.00,V,N*48
$GPGST,063153.00,8.8,,,,49,60,327*68
$GPZDA,063153.00,13,10,2015,00,00*61
$GPRMC,063154.00,V,,,,,,,131015,,,N*7F
$GPVTG,,,,,,,,,N*30
$GPGNS,063154.00,,,,,NN,02,5.52,,,,*78
$GPGGA,063154.00,,,,,0,02,5.52,,,,,,*53
$GPGSA,A,1,05,02,,,,,,,,,,,5.61,5.52,1.00*06
$GPGSV,2,1,05,02,65,328,33,04,,,21,05,43,279,39,07,,,21*70
$GPGSV,2,2,05,13,,,31*7C
$GPGLL,,,,,063154.00,V,N*4F
$GPGST,063154.00,10,,,,42,53,308*46
$GPZDA,063154.00,13,10,2015,00,00*66
$GPRMC,063155.00,V,,,,,,,131015,,,N*7E
$GPVTG,,,,,,,,,N*30
$GPGNS,063155.00,,,,,NN,02,5.52,,,,*79
$GPGGA,063155.00,,,,,0,02,5.52,,,,,,*52
$GPGSA,A,1,05,02,,,,,,,,,,,5.61,5.52,1.00*06
$GPGSV,2,1,05,02,65,328,33,04,,,21,05,43,279,39,07,,,21*70
$GPGSV,2,2,05,13,,,31*7C
$GPGLL,,,,,063155.00,V,N*4E
$GPGST,063155.00,10,,,,38,47,296*49
$GPZDA,063155.00,13,10,2015,00,00*67
$GPRMC,063156.00,V,,,,,,,131015,,,N*7D
$GPVTG,,,,,,,,,N*30
$GPGNS,063156.00,,,,,NN,02,5.52,,,,*7A
$GPGGA,063156.00,,,,,0,02,5.52,,,,,,*51
$GPGSA,A,1,05,02,,,,,,,,,,,5.61,5.52,1.00*06
$GPGSV,2,1,05,02,65,328,34,04,,,21,05,43,279,39,07,,,21*77
$GPGSV,2,2,05,13,,,31*7C
$GPGLL,,,,,063156.00,V,N*4D
$GPGST,063156.00,8.8,,,,34,44,288*65
$GPZDA,063156.00,13,10,2015,00,00*64
$GPRMC,063157.00,V,,,,,,,131015,,,N*7C
$GPVTG,,,,,,,,,N*30
$GPGNS,063157.00,,,,,NN,03,6.67,,,,*7F
$GPGGA,063157.00,,,,,0,03,6.67,,,,,,*54
$GPGSA,A,1,05,02,13,,,,,,,,,,11.79,6.67,9.72*30
$GPGSV,2,1,05,02,65,328,33,04,,,19,05,43,279,39,07,,,21*7B
$GPGSV,2,2,05,13,16,203,30*4B
$GPGLL,,,,,063157.00,V,N*4C
$GPGST,063157.00,15,,,,65,58,124*42
$GPZDA,063157.00,13,10,2015,00,00*65
$GPRMC,063158.00,V,,,,,,,131015,,,N*73
$GPVTG,,,,,,,,,N*30
$GPGNS,063158.00,,,,,NN,03,6.68,,,,*7F
$GPGGA,063158.00,,,,,0,03,6.68,,,,,,*54
$GPGSA,A,1,05,02,13,,,,,,,,,,11.79,6.68,9.72*3F
$GPGSV,2,1,06,02,65,328,33,04,,,15,05,43,279,39,07,,,21*74
$GPGSV,2,2,06,10,,,21,13,16,203,30*4A
$GPGLL,,,,,063158.00,V,N*43
$GPGST,063158.00,15,,,,51,40,83*7F
$GPZDA,063158.00,13,10,2015,00,00*6A
$GPRMC,063159.00,A,3512.07569,N,13657.35962,E,0.384,,131015,,,A*75
$GPVTG,,T,,M,0.384,N,0.710,K,A*2A
$GPGNS,063159.00,3512.07569,N,13657.35962,E,AN,03,6.68,60.5,35.8,,*42
$GPGGA,063159.00,3512.07569,N,13657.35962,E,1,03,6.68,60.5,M,35.8,M,,*67
$GPGSA,A,3,05,02,13,,,,,,,,,,11.80,6.68,9.73*3A
$GPGSV,2,1,05,02,65,328,34,05,43,279,39,07,,,22,10,,,21*71
$GPGSV,2,2,05,13,16,203,31*4A
$GPGLL,3512.07569,N,13657.35962,E,063159.00,A,A*64
$GPGST,063159.00,13,,,,45,37,77*76
$GPZDA,063159.00,13,10,2015,00,00*6B
$GPRMC,063200.00,A,3512.07567,N,13657.35957,E,0.527,,131015,,,A*7D
$GPVTG,,T,,M,0.527,N,0.976,K,A*2B
$GPGNS,063200.00,3512.07567,N,13657.35957,E,AN,03,6.68,61.0,35.8,,*41
$GPGGA,063200.00,3512.07567,N,13657.35957,E,1,03,6.68,61.0,M,35.8,M,,*64
$GPGSA,A,3,05,02,13,,,,,,,,,,11.81,6.68,9.74*3C
$GPGSV,2,1,05,02,65,328,33,05,43,279,38,07,,,19,10,,,21*7F
$GPGSV,2,2,05,13,16,203,31*4A
$GPGLL,3512.07567,N,13657.35957,E,063200.00,A,A*63
$GPGST,063200.00,14,,,,38,32,67*70
$GPZDA,063200.00,13,10,2015,00,00*64
$GPRMC,063201.00,A,3512.07549,N,13657.35949,E,0.887,,131015,,,A*78
$GPVTG,,T,,M,0.887,N,1.643,K,A*24
$GPGNS,063201.00,3512.07549,N,13657.35949,E,AN,03,6.69,61.5,35.8,,*47
$GPGGA,063201.00,3512.07549,N,13657.35949,E,1,03,6.69,61.5,M,35.8,M,,*62
$GPGSA,A,3,05,02,13,,,,,,,,,,11.82,6.69,9.74*3E
$GPGSV,2,1,05,02,65,328,33,05,43,279,38,07,,,18,10,,,21*7E
$GPGSV,2,2,05,13,16,203,31*4A
$GPGLL,3512.07549,N,13657.35949,E,063201.00,A,A*61
$GPGST,063201.00,14,,,,34,29,61*71
$GPZDA,063201.00,13,10,2015,00,00*65
$GPRMC,063202.00,A,3512.07524,N,13657.35947,E,0.660,,131015,,,A*79
$GPVTG,,T,,M,0.660,N,1.222,K,A*20
$GPGNS,063202.00,3512.07524,N,13657.35947,E,AN,03,6.69,61.5,35.8,,*41
$GPGGA,063202.00,3512.07524,N,13657.35947,E,1,03,6.69,61.5,M,35.8,M,,*64
$GPGSA,A,3,05,02,13,,,,,,,,,,11.82,6.69,9.75*3F
$GPGSV,1,1,04,02,65,328,33,05,43,279,38,10,,,21,13,16,203,31*44
$GPGLL,3512.07524,N,13657.35947,E,063202.00,A,A*67
$GPGST,063202.00,14,,,,31,27,56*7D
$GPZDA,063202.00,13,10,2015,00,00*66
$GPRMC,063203.00,A,3512.07481,N,13657.35935,E,0.353,,131015,,,A*76
$GPVTG,,T,,M,0.353,N,0.654,K,A*21
$GPGNS,063203.00,3512.07481,N,13657.35935,E,AN,03,6.69,61.7,35.8,,*49
$GPGGA,063203.00,3512.07481,N,13657.35935,E,1,03,6.69,61.7,M,35.8,M,,*6C
$GPGSA,A,3,05,02,13,,,,,,,,,,11.83,6.69,9.75*3E
$GPGSV,1,1,04,02,65,328,34,05,43,279,38,10,,,21,13,16,203,30*42
$GPGLL,3512.07481,N,13657.35935,E,063203.00,A,A*6D
$GPGST,063203.00,14,,,,28,25,52*72
$GPZDA,063203.00,13,10,2015,00,00*67
$GPRMC,063204.00,A,3512.07438,N,13657.35879,E,0.114,,131015,,,A*7B
$GPVTG,,T,,M,0.114,N,0.210,K,A*24
$GPGNS,063204.00,3512.07438,N,13657.35879,E,AN,03,6.70,62.8,35.8,,*41
$GPGGA,063204.00,3512.07438,N,13657.35879,E,1,03,6.70,62.8,M,35.8,M,,*64
$GPGSA,A,3,05,02,13,,,,,,,,,,11.84,6.70,9.76*32
$GPGSV,1,1,04,02,65,328,34,05,43,279,38,10,,,21,13,16,203,30*42
$GPGLL,3512.07438,N,13657.35879,E,063204.00,A,A*61
$GPGST,063204.00,14,,,,26,23,49*77


位置座標が表示され始めたのは０６３１５９（０６時３１分５９秒）です。
時刻表示が開始されたのが０６時３１分２７秒で、ＧＰＳ回路に電源を投入したのは、それより数秒前ぐらいですから、電源を入れてから４０秒程度で位置座標が表示されたことになります。
１ｐｐｓの出力はそれよりも前に始まりました（多分電源ＯＮから２０秒〜３０秒後）。

●Ｇｏｏｇｌｅ地図で座標を確認

せっかく現在位置の座標が求まったのですから、どれくらい正確に測地できているのか、Ｇｏｏｇｌｅ地図で確認してみました。
上でお見せしたデータで、下から２行目のところにちょうど現在位置の緯度と経度が出ています。
３５１２．０７４３８，Ｎが緯度です。
Ｎ（北緯）３５°１２’でその下は小数になっていますから、秒に換算すると、０．０７４３８×６０＝４．４６２８です。
北緯３５°１２’４．５”です。
１３６５７．３５８７９，Ｅが経度です。
Ｅ（東経）１３６°５７’の下は小数になっていますから秒に換算すると、０．３５８７９×６０＝２１．５２７４です。
東経１３６°５７’２１．５”です。



惜しい！
緯度（南北）、経度（東西）とも数メートルずれてしまいました。
マークがパレス守山の前の道路を示しています。

それにしても。
なかなかに正確なものではありませんか。
ちょいと感激です。

周波数カウンタ組立キット［第２５回］
２０１５．１０．１４ｕｐｌｏａｄ

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