Distance meter. Measuring instrument with laser beam that calculates the distance (the simplest) from the device to the next opaque point to which we point with it.
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- 1 Description
- 2 Electronic distance measurement
- 3 Tellurometers
- 4 Sources
The distance meter is a laser beam measuring instrument that calculates the distance (the simplest) from the device to the next opaque point to which we point with it.
The distance meter was created to facilitate measurements where a flexometer could not reach. If the distance was very long and there was no support, it was doubled or not long enough.
Electronic measurement in distances
Electronic distance measurement (MED or EDM) is based on the properties of an electromagnetic wave propagated in the atmospheric environment, and on the measurement of its phase. The instrument that performs this measurement is the distance meter, which is generally coupled or incorporated within the Total Station, next to the telescope.
The MED is not an exclusive function of the total stations, but rather that the electronic theodolites also perform it.
Electronic distance meter that determines distances by electromagnetic procedures or microwave systems with frequencies of 1010 Hz and wavelengths of 1 m to 1 cm.
Conventional electro distance meters make a horizontal or vertical partition of the eyepiece. With the Left half they make the light ray emission and with the right half the reception. This design is for working with conventional prisms but not for reflector cards.
When we measure with the reflector cards the inclination of this causes variations in the return of the light beam that make it impossible to obtain a result, or to obtain erroneous results.