What Is an Electronic Level?

Electronic level is also called digital level. It consists of a base, a level, a single telescope and a data processing system. The electronic level is based on an automatic Anping level, and a beam splitter and a detector (CCD) are added to the optical path of the telescope. Optical and electromechanical integration of high-tech products composed of stripe coding ruler and image processing electronic system. ^[1]

In 1963, the Fennel plant developed a coded theodolite, plus the ones that had already appeared in the 1940s.

At present, the sighting scale and focusing of the electronic level still need to be performed visually. After manual debugging, the scale bar code is imaged on the telescope differentiation plate for visual observation on the one hand, and on the other hand, the spectroscope of the telescope is imaged on a photoelectric sensor (also called a detector) to read the electrons. Because the bar code patterns of the scale codes of different manufacturers are different, the bar code scales are generally not interoperable. When using a traditional level to measure, the electronic level can also be used like an ordinary automatic leveling level, but the measurement accuracy at this time is lower than the accuracy of the electronic measurement, especially the precision electronic level, because there is no optical micrometer, it is regarded as a normal automatic The Anping level is less accurate when used.

This instrument uses the principles of modern electronic engineering to identify the bar code division on the bar code level by the sensor, obtain the observed value through information conversion processing, and display it in a digital form on the display window or stored in the processor. The structure of the instrument is shown in the figure. The instrument has an automatic leveling compensator with a compensation range of ± 12 '. The leveling rule that comes with the instrument is a stripe code rulerglass fiber plastic or steel ruler. The leveling ruler is a double-sided three-segment folding type. Each segment is 1.35m in length and the total length of the ruler is 4.05m. The stripe code sub-picture is used for electronic scanning when observing the electron level, and the centimeter sub-picture on the other side of the ruler can be used for optical level observation.

As a new type of electronic level, it changes the reality of traditional field height difference measurement by manual reading and manual recording. The electronic level uses the REC module to store data and information, insert the module into the level slot, automatically record field observation data, read the content with a GIF 10 or GIF 12 reader and exchange data with peripherals (computers, printers).

1) Placement instrument: The placement of electronic level is the same as that of optical level.

2) Leveling: Rotate the foot screw to center the bubble of the circular level box.

3) Input station parameters: Enter the station height.

4) Observation: Point the telescope at the stripe level and press the measurement button on the instrument.

5) Reading: Read the height difference and elevation directly from the display window. In addition, other data such as distance can be obtained. ^[4]

The following points must be noted before using the electronic level:

1) Do not point the lens at the sun. Directly pointing the instrument at the sun will damage the observer's eyes and the electronics inside the instrument.

element. When the sun is low or the sun is shining directly on the objective lens, use an umbrella to block it. '

2) The surface of the stripe coding ruler is kept clean and cannot be scratched. The instrument is converted into telecommunications by reading the ruler's black and white stripes.

If the surface of the ruler is covered with dust, dirt, or abrasions, it will affect the accuracy of the plan or it will not be able to measure at all. ^[2]