- Pengertian
- Syarat – syarat theodolite
2.sumbu kedua haarus benar – benar mendatar.
3.garis bidik harus tegak lurus sumbu kedua / mendatar.
4.tidak adanya salah indeks pada lingkaran kesatu.
Home » Posts filed under theodolite wild
Posted by Sate Ayam on Tuesday, September 29, 2009
Posted by anggota member on Wednesday, August 5, 2009
Theodolite is a measuring instrument capable of measuring azimuth and elevation angles to very high accuracy. When computing power and high precision laser distance measuring capability is added, the laser theodolite that results can measure or locate three dimensional "point-in-space" positions within a sphere of 5 millimeter radius.
I had previously surveyed this site with the instrument, including all the buried pipe and conduit runs as I installed them. The lower line of posts for the solar structure are dangerously close to the septic leach field, so it was important to place them accurately to avoid augering into a septic line.
Moreover I believed that precision placement would be critical to the success of erecting the support structure. It's hard enough to thread a lot of heavy precut pipes together in mid-air, but sloppy tolerances would make this 100-foot long monster the mother of all plumber's nightmares.
Using the laser theodolite is a 2-person procedure - one at the instrument and one at the cooperative retro-reflector target. When the laser theodolite level locates a stakeout point it displays the distance to that spot and projects a pair of parallel visible laser beams right to the spot. One beam blinks and the other is solid. The target person can pace the indicated distance, then look back and move from side to side to reach the point where the beam transitions from blink to solid. The target is thus placed and another measurement reveals the error for another try. This iterative procedure quickly converges on the precise location.
Elaine (my wife) is not a technocrat and therefore has limited patience as the target person. So I constructed a replacement for her. It is a simple XY table, made of waxed MDF, with leveling feet and a mount for the retro-reflector target.
The XY table is placed at an approximate location facing the laser theodolite, which measures its location and indicates the error in XY movement. If the error is large, the table must be relocated by the approximate amounts. If the error is small, the table is moved in its ways by the indicated amounts. Another measurement is taken and the procedure repeats. When the measured error is acceptable (usually after three measurements) the retro-reflector is lifted from the table and a marker spike is dropped through the hole into the ground.
http://prossen.com
Dukung Kampanye Stop Dreaming Start Action Sekarang
Posted by Sate Ayam on Friday, July 10, 2009
http://en.wikipedia.org/wiki/theodolite
Posted by jenggot kambing on Tuesday, June 23, 2009
Untuk menentukan titik utara selatan terdapat beberapa cara, yaitu dengan menggunakan alat theodolite dari toko alat survey, alat survey tongkatistiwa (sundilan), teropong, kompas. Di antara cara-cara tersebut di atas, yang paling mudah, murah, dan memperoleh hasil yang teliti adalah dengan mempergunakan tongkat istiwa atau alat theodolite.
Caranya, tancapkan sebuat tongkat lurus atau theodolite pada sebuah pelataran datar yang berwarna putih cerah. Panjang tongkat theodolite sekitar 30 cm dan berdiameter satu cm. Ukurlah dengan lot dan waterpass sehingga pelataran betul-betul datar dan tongkat betul-betul tegak lurus terhadap pelataran. Lalu, lukislah sebuah lingkaran berjari-jari sekitar 20 cm yang berpusat pada pangkal tongkat tadi.
Kemudian, amati dengan teliti bayang-bayang tongkat beberapa jam sebelum tengah hari sampai sesudahnya. Semula, tongkat akan mempunyai bayang-bayang panjang menunjuk ke arah Barat. Semakin siang, bayang-bayang semakin pendek, lalu berubah arah sejak tengah hari. Kemudian semakin lama bayang-bayang akan semakin panjang lagi menunjuk ke arahTimur. Dalam perjalanan seperti itu, ujung bayang-bayang tongkat akan menyentuh lingkaran sebanyak dua kali pada dua tempat, yaitu sebelum tengah hari dan sesudahnya.
Selanjutnya kedua sentuhan itu kita beri tanda dan hubungkan antara keduanya dengan garis lurus. Garis ini merupakan arah Barat-Timur secara tepat. Lalu lukislah garis tegak lurus pada garis Barat-Timur tersebut, maka akan memperoleh garis Utara-Selatan yang persis menunjuk titik Utara sejati.
bakosurtanal.go.id/
Untuk informasi lebih lanjut, silahkan lihat di Alat Survey ~ Jual Alat Survey ~ Toko Alat Survey ~ Survey Theodolite ~
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