How does a compass work and how is it arranged? Why does his arrow point exactly north? What to do if the libraries are not connected

Modern tablets replace many devices - media players, laptops, mobile phones and even a compass. But, oddly enough, the latter option is quite difficult to implement, and the digital version of such a simple device may simply not work. So, what to do if the compass does not work on the tablet?

Causes of a compass malfunction on a tablet

Before understanding digital technologies, let's recall the principle of the classic compass. This device was invented many centuries ago, and its main task is to show the correct position of the North and South. An ordinary compass consists of a magnetized needle, which, depending on the strength of the magnetic attraction of the earth's field, points in the right direction.

The principle of the compass on the tablet can be based on two systems:

1. In the first, the tablet receives location data from GPS satellites, processes them, associates them with accelerometer indicators, and displays the result in the form of a corresponding picture;
2. In the second, the tablet system provides for the presence of special magnetometers that measure the earth's magnetic field, combine data with an accelerometer, and, based on the position of the gadget in space and the amount of radiation, indicate the desired direction.

The reason that the compass does not work in the first case is a malfunction of the GPS module, accelerometer or poor signal quality from satellites.

In the second situation, in most cases, compass calibration is necessary. Although the tablet receives all the data it needs, it doesn't know how to use it. Calibration is quite simple:

• go to any convenient application where there is a compass, for example, Google Maps;
• stretch the tablet in front of you and make an eight-shaped movement;
• repeat this procedure several times until the compass shows a normal heading.

It is advisable to carry out this procedure in an open area so that there are no powerful sources of electricity nearby and various devices that can emit magnetic waves that interrupt the natural radiation of the earth.

KOMPAS 3D- a popular program designed for the development of design and project documentation. The brainchild of the Russian company Ascon, the program has long won the respect of users.

One of the advantages of the system is the ability to purchase additional libraries to expand the capabilities of the program. For example, a library of standard parts that you can add to your working 3D assemblies in a ready-made form - bearings, seals, piping elements, fasteners, etc.

How to connect the library in the KOMPAS 3D program?

In order for the downloaded library to "work", you need to correctly to plug. To do this, you will have to perform several operations:

1. Make sure that the downloaded library files are in the correct folder (it is called Libs);
2. Having opened the program, in the "Tools" menu, find the command "Library Manager";
3. After clicking, a list of files will appear, among which we select the required one - for this, there is a “Connect” button in the context menu;
4. If the library is not in the list, click "Add" and specify the location;
5. Connected libraries are marked in the list with checkmarks.

For the program KOMPAS-3D Portable(not requiring installation) libraries are connected as follows:

1. Menu Tools - Library Manager - RMB - Add Description - Application Library;
2. Select the required file;
3. Repeat steps for each included library

Please note that library files have *dll or *rtw extensions. *tlm files are related to templates and are connected through the "Template Manager".

What to do if the libraries are not connected?

This error can be caused by various reasons. What can be done to improve the situation?

We are surrounded by a huge number of very interesting things that were invented many centuries ago and have not changed much in terms of functionality. One of these items is a compass, or in other words, a device with a built-in magnetized needle. Almost every one of us at least once thought about how the compass works and what its principle of operation is.

Who Invented the Compass?

This device, which is still popular today, was invented in ancient China. There are several versions of its appearance:

1. Three thousand years before our era, the then Chinese lands were ruled by Huang Di. The emperor is credited with creating the first navigation aids, thanks to which he saved his army in the desert. However, there is no exact data on this fact;
2. According to another version, at the turn of the 1st-2nd century BC, the ancient Chinese already used a round object, inside of which there was a magnetic stick;
3. It is historically known that already in the 13th century, during the reign of the Song Dynasty, the empire massively used devices for orientation while crossing deserts.

As for the European part of the continent, the compass appeared here in the middle of the 12th-13th centuries. Outwardly, he looked very simple and concise. A cork was installed in a small container filled with water, and a pointer was attached on top.

Only two hundred years later, thanks to the efforts of Flavio Gioia, the predecessor of the navigator underwent changes. The Italian modernized the design by installing an arrow on the vertical axis, and placed a non-magnetic round contour with divisions around it.

Since that time, the design features have constantly changed, but the principle and meaning have remained the same.

How is a compass made?

The principle of operation of the device depends on its type. Known three main types of compass:

• Magnetic;
• Gyro-compass;
• Electronic.

A classic magnetic compass consists of a round plastic or brass box with a steel spike in the center. At the end of the spire, perpendicular to its axis, there is magnetic pointer . Also, some models have a special brake (fuse), and the top case is covered with glass.

It works very simply. The magnetized index axis interacts with the natural magnetic field of the Earth and rotates parallel to the lines of force of our planet. Accordingly, according to the direction of the line to the north, the arrow will be directed in the same way.

As for the gyrocompass, it is widely used in the navigation systems of ships as a geographic direction indicator and determines the azimuth and heading. It consists of a gyroscope placed in the middle of the ball. The ball itself floats freely in a vessel filled with liquid. Its center of gravity is located at the bottom.

The electronic version of the device works on the principle of calculating the location using satellite data. It constantly receives and receives a signal from the navigation satellite, and thereby determines the direction of movement, as well as coordinates and speed.

How to determine the sides of the horizon?

For orientation on the ground, first of all, set the compass as level as possible relative to the horizontal plane, after which we release the brake. The arrow will start to rotate and then point to the cardinal direction. Its sharp part will be directed to the north. Most often it is painted in dark blue, and the lower part is red. On the opposite side there will be south, and on the right and left east and west, respectively.

At the bottom of the structure on the inside there is a marking. The circle can be divided into four equivalent sectors with two perpendicular diameters, at the ends of which the letters C, S, Z and B are marked. Also on the limb is a scale from 0 to 360 degrees with a division step of 10-15 degrees.

It should be clarified that the readings of the magnetic pointer may be wrong, if you determine the direction of light near high-voltage power lines or railroad tracks.

It is also necessary to periodically check the compass. To do this, in a state of rest, excite the arrow with a short-term influence of a foreign metal object. If, after exposure, it returned to its previous position, then the device is working. When finished working with it, it is recommended to always press the fuse lever and carry it in a case or case.

How to make a compass yourself?

It is noteworthy, but such a tourist assistant can be made with your own hands at home. For this:

1. Choose the material for the needle of the device. As it we can take a pin, a paper clip, a hairpin or an ordinary sewing needle;
2. We magnetize the selected structural element. It is advisable to do this with an ordinary magnet, passing it along our pointer at least 40-50 times. If there is no magnet at hand, use a woolen or silk cloth, but it will take a little longer to rub;
3. In addition to the above components, you need to prepare a jar or a small bowl of water, as well as a cork or foam plastic with a diameter of about 2 cm. Next, insert the pointer horizontally symmetrically into the cork;
4. It remains only to assemble our gadget. To do this, simply insert a handicraft rotary mechanism into a jar or bowl of water.

Thus, as it rotates, the needle will indicate which direction is north. This method determines only an approximate direction, and it is best to do this in still water and in the absence of wind.

Advantages and disadvantages of GPS

In the digital age, more and more travelers are ditching paper maps in favor of electronics. We will compare what is better and more convenient, and what to give preference to.

From benefits GPS should be highlighted:

• Perfectly orients in conditions of poor visibility, fog, snow, accurately determines the path;
• Support for local regional maps;
• Loading already laid routes with all the necessary marks;
• Visualization of the passed tracks, uploading them to the Internet.

From cons note the following:

• Skills and ability to work with the map become dull;
• Dependence on the power supply;
• The probability of signal loss.

Technology is constantly evolving, and every day there is something new and better. The same applies to orientation and navigation devices. And whatever they are, the basic basis is the principle of how and due to what the compass works.

Video about the compass device

In this video, Arkady Pushnoy will tell you how the compass works, how to use it correctly and how you can make the device yourself from improvised means: