Can silver dollars affect the accuracy of a geological compass?

No, silver dollars are not magnetic.

1. There is a pointer on the geological compass, which indicates the direction of the magnetic meridian, which can roughly determine the azimuth angle of the target relative to the magnetic meridian, and use the level device to measure its vertical angle (depression angle or elevation angle) to determine the position of the measured object.

2. There are many styles of geological compass, but the structure is basically the same, and we commonly use the basin geological compass. It is composed of several parts, such as a magnetic needle, a dial, an inclinometer, an aiming plate, and a level, which are installed in a round basin made of copper, aluminum, or wood.

3. The magnetic needle is generally a diamond-shaped steel needle with a wide middle and two sides of the tip, which is installed on the thimble of the chassis **, which can rotate freely, and the brake screw should be tightened when not in use, and the magnetic needle should be lifted and pressed on the cover glass to avoid the collision between the magnetic needle cap and the tip of the necklace, so as to protect the tip of the thimble and prolong the use time of the compass. When taking measurements, loosen the fixing screws to make the magnetic needle swing freely, and finally when stationary, the magnetic needle points in the direction of the meridian of the magnetic needle. Due to the unequal magnetic force at both ends of the magnetic needle in the northern hemisphere, the magnetic needle is out of balance.

In order to keep the magnetic needle balanced, several turns of copper wire are often wound around the south end of the magnetic needle, which is also convenient to distinguish the north and south ends of the magnetic needle.

No, it doesn't. The most precise geological compass is the magnetic needle, which is not affected by ordinary objects without a magnetic field. But stay away from things with magnetic forces, such as mobile phones, computers, etc.

No, unless there is a weak magnetism when rubbing with the silk fabric.

The geological compass is an indispensable tool for field geological work. With the help of it, it can determine the direction, the location of the observation point, and measure the spatial position of any observation surface (such as rock layer, fold axis plane, fault plane, joint plane......).and other spatial positions of tectonic planes), as well as the determination of various tectonic elements of igneous rocks, the occurrence of ore bodies, etc. Therefore, it is necessary to learn to use a geological compass.

The electronic compass, also known as the digital compass, has been widely used as a navigation instrument or attitude sensor in modern technical conditions. Compared with the traditional pointer and balance frame structure compass, the electronic compass has low energy consumption, small size, light weight, high precision and miniaturization, and its output signal can be digitally displayed through processing, which can not only be used to point, but also the digital signal can be directly sent to the autopilot to control the control of the ship. At present, the three-axis strapdown reluctance digital magnetic compass is widely used, which has the advantages of anti-sway and vibration resistance, high heading accuracy, electronic compensation for the interference field, and can be integrated into the control loop for data linking, so it is widely used in aviation, aerospace, robotics, navigation, vehicle autonomous navigation and other fields.

There are leveling tubes in the geological compass that can be used to measure inclination, which cannot be done with an electronic compass.

The geological compass has a black needle compass, and the white needle points to the north; It's good to remember, white vs. north.

The way to test azimuth is to look at the black needle or the white needle, depending on how you hold the compass and whether you are in front of or behind the antenna.

When you are under the tower (you must be directly below the antenna of the cell under test), facing the antenna. At this time, there is a mirror side facing the tower, and you are also facing the tower. At this time, if the antenna can be seen in the mirror, the ground level of the antenna should cross perpendicular to the center line of the mirror.

At this point, you should read the azimuth scale that the white hand points to. On the contrary, if you hold the compass when there is a side of the mirror facing you, at this time the antenna of the measured cell still needs to ** into the mirror, and the horizontal line on the bottom surface of the mirror is perpendicular to the middle line of the mirror, at this time you want to read the black needle scale. In layman's terms, when the mirror side is facing your own arms, there is a scale side pointing to the antenna covering the front, but the antenna must be inserted into the mirror, so that the horizontal line on the bottom surface of the mirror crosses vertically with the vertical line of the mirror.

At this time, you will look at the white needle, and vice versa.

When testing the pitch angle of the antenna, the side with the mirror must face upwards and the side with the scale must point to the ground. At this time, the fingers of the compass hand slowly pluck the iron plate behind the compass to adjust the level, pay attention to the level in the compass, at this time, try to put the level bubble in the center line, and read the scale of the level is the pitch angle of the antenna. (Notes:.)

When testing the pitch angle, you must first test the verticality of the pole to ensure the accuracy of the test, and the side with the scale must point to the ground, otherwise the pitch angle error is 2 3 degrees. ）

The compass should be kept level during the azimuth test, and avoid getting too close to the tower or too close to the mobile phone. The magnetic field of the mobile phone acts like a magnet, causing the pointer to fail.