A gyroscope is mounted in a sphere, lined with Mu-metal to reduce magnetic influence, connected by a spindle to the vertical axis of the theodolite. The battery-powered gyro wheel is rotated at 20,000 rpm or more, until it acts as a north-seeking gyroscope.
Table of Contents
How does a Gyrotheodolite work?
A gyroscope is mounted in a sphere, lined with Mu-metal to reduce magnetic influence, connected by a spindle to the vertical axis of the theodolite. The battery-powered gyro wheel is rotated at 20,000 rpm or more, until it acts as a north-seeking gyroscope.
What are the types of gyrotheodolite?
The gyroscope and the theodolite are used as a whole, and the combination is of the following types: under-hanging and on-shelf. Under-mounted instruments were developed in the 1950s, and almost all precision instruments and instruments with a high degree of automation belong to this category.
What is gyro survey?
The tool incorporates gyroscopes and accelerometers to measure azimuth, inclination and tool face. It can be run on memory mode or electric line, which allows readings and data quality to be recorded in real time, with no limitations on recording time (there is no need for a battery pack).
How does a gyrocompass find true north?
Gyrocompass
- they find true north as determined by the axis of the Earth’s rotation, which is different from, and navigationally more useful than, magnetic north, and.
- they are unaffected by ferromagnetic materials, such as in a ship’s steel hull, which distort the magnetic field.
What is tunnel survey?
Tunnel Survey is that branch of survey that is concern with the surveying in a tunnel. This type of survey is required in mining works, deep tunnel sewerage works and underground railway works. The techniques used in this type of survey is different from those used on ground.
What is gyro while drilling?
GyroGuide – Gyro While DrillingTM (GWD) offers unequaled precision and accuracy, which mitigates risk and achieves substantial cost reduction. GWD collects real-time survey data at all inclinations and in any direction, thus offering safe and accurate wellbore positioning.
What is gyro wireline?
Gyrodata’s full suite of wireline services provide life of the well information in order to enhance, wellbore placement, casing integrity, completion and production decisions across a wide range of applications, resulting in an unparalleled level of safety and return on your investment.
What are the key differences between the gyrocompass and the magnetic compass?
is that gyrocompass is a north-seeking form of gyroscope used as a directional reference in navigation while compass is a magnetic or electronic device used to determine the cardinal directions (usually magnetic or true north).
What are the advantages and disadvantages of a gyrocompass?
What are advantages and disadvantages of Gyro Compass?
- It always shows true north.
- The gyro will have a number of repeaters.
- Gyro input can be fed to RADAR/ARPA/AUTO PILOT/ Echo Sounder.
- Does not use earth’s magnetic field for reference.
- It will not deflected by any external force such as magnet, iron etc.
What are the types of total station?
The following are various total station types used in surveying,
- Mechanical Total Stations. Mechanical Total Station.
- Robotic Total Stations. Robotic Total Station.
- Prism Total Stations. Both the mechanical & robotic total stations come under prism models.
- Reflector.