In this article we will consider a device such as a curvimeter. What is it - few know. And everything is quite simple. The word itself comes from the Latin curvus, which means a curve. And this device is intended for accurate measurement of distances on topographic maps, if the segment has a winding structure.
Curvimeter for cards. Mechanical design
This device was invented for a long time and is very simple in its design. In the above photo you can see old-style curvimeters. They are significantly different from modern electronic models. Most often, the mechanical version of the curvimeter looks like a small plastic device (no more than 50 grams) with a wheel located at one end, and comes with a case.
Existing types of curvimeters have either a circular or rectilinear scale. Regardless of this feature, they can be of only two types. Or it is a device with a fixed dial, in which case the arrow (index) will be movable. Or with a movable dial, but a fixed index. In order to measure the length of the desired segment, it is necessary to roll the wheel at the curvimeter along it. The standard scale length is 100 centimeters. There is of course a slight error in this device. It corresponds to 0.25 centimeters when measuring a line with a length of not less than 50 cm.
Some mechanical curvimeters have both a metric and an inch scale. The step of dividing the metric scale is one centimeter, inch - 0.05 inches.
Rules for using a curvimeter
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More complex designs are intended for a variety of difficult to perform graphical measurements, as well as calculations. They are equipped with software, have a connection to a computer and have a large number of functions of an architectural and engineering nature. The capabilities of such a device include processing various values (up to 50), such as feet, inches, and so on, and, of course, a metric scale. Such a curvimeter can be used when working with drawings and maps of any complexity. Another positive feature of this model is data storage.The disadvantages of the electronic version of the curvimeter include sensitivity to weather influences and dependence on the power source. Impact resistance is also significantly lower. Most often, these electronic curvimeters are used when working in the office, but not in the field.
Travel curvimeter is another type of measuring device
Another curvimeter. What is it, and how does it differ from previous models?
Its other name is a measuring or road wheel. This view is also intended for marking and measuring distance, but not on the map, but on the terrain, most often with an uneven surface. It is used in cases where it is not possible to use light-range finders, tape measures and other devices.Functions and principle of the road wheel
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Well, now you know enough about such a device as a curvimeter. What it is, what it is intended for, how it works, its types and advantages, but whether it is necessary or not, decide for yourself.