RU219513U1 - ALTIMETER WITH CONTROL OF THE DISTANCE TO THE OBJECT OF MEASUREMENT - Google Patents

Abstract

The utility model is intended for use in the forest industry, namely for determining the heights of standing trees. The technical result of the proposed altimeter with control of the distance to the measurement object is to provide visual control of the base measurement distance in relation to the object being measured, which helps to reduce the complexity of work when measuring the heights of objects by eliminating the need to use additional measuring devices when choosing a measurement point. The altimeter with control of the distance to the object of measurement includes a housing with a measuring scale, a bar is attached to the housing, along the edges of which two directional laser emitters are installed, generating radiation in the visible range and having a laser beam cross-sectional shape that is different from each other. The laser beams intersect at a point at a distance from the bar corresponding to the base measurement distance when using the altimeter's measuring scale.

Description

The utility model is intended for use in the forest industry, namely for determining the heights of standing trees.

Christen's altimeter is known [Wolf Ruecker. Atkinson, Christen and faustmann hypsometers // Wolfs plumb bob news. - Issue 09. - September 1. - 2013. - C. 107-109. - Electronic resource. - Access mode: http://www.plumbbobcollectors.info/media//DIR_42117/DIR_233801/b70b152951a2bl24ffff802afffffff2.pdf, accessed 12/16/2022], consisting of a copper ruler with divisions and small thickened protrusions at the ends. Measuring the height of a tree with this tool involves the use of a 4 m pole placed next to the tree to be measured.

The disadvantage of the known Christen's altimeter is the inconvenience in operation associated with the need to use a high (height 4 m) pole, which is installed each time next to the measured tree, moving through the forest with which is a very difficult task.

Known pendulum type altimeter [Anuchin N.P. Forest inventory: Textbook for universities. - 5th ed., add.-M.: Timber industry. - 1982. - S. 36-39] having a flat body in the form of a sector on which a measuring scale is applied. Attached to the body, with the possibility of rotation around the axis of attachment, the pendulum arrow.

The disadvantage of the known altimeter ET-1P is the inconvenience associated with the difficulty of establishing the measurement point, which must be at a certain distance from the object of measurement. This requires the use of an additional measuring tool, such as a measuring tape, to establish a predetermined distance from the object being measured.

Known multifunctional and compact electronic laser rangefinder Nikon Laser Forestry Pro for forestry [Nikon Introduces New Laser Rangefinder "Forestry Pro". 09/09/2011. - Electronic resource. - Access mode: https://www.nikon.com/news/2011/0909_foresty-pro_01.htm, accessed 12/16/2022], which allows you to measure the height of trees using the three-point method. The rangefinder is equipped with an LCD monitor, which displays the measurement results. Allows you to measure distances from 7.5 to 1600 m.

The disadvantage of the well-known multifunctional and compact laser rangefinder Nikon Laser Forestry Pro is the complexity of the design. Inconvenience of use in open space due to poor visibility of readings on the LCD monitor in bright sunlight. Another disadvantage of the known range finder is that its design uses a laser with beams of a color invisible to the eye. The determination of the distance is carried out by measuring the time of passage of the laser beam from the range finder to the object and back. When carrying out work in the forest, an obstacle in the form of undergrowth, bushes, and the like may appear in the path of the laser beam, while the researcher cannot visually control the correct aiming of the laser beam at the measured object. This may lead to measurement errors. Also, the unevenness of the outer surface of the bark covering the trunk of the tree being measured, its poor reflectivity, can lead to the fact that the reflected laser beam does not fall into the lens of the reflected beam receiver, and the distance will not be measured.

The closest in essence and taken as a prototype is the well-known forest taxation altimeter Suunto RM-5/1520 [Field methods manual // Technical Paper. No. 59. March 1995, pp. 33-36. - Electronic resource. - Access mode: https://www.dpi.nsw.gov.au/_data/assets/pdf_file/0004/389803/Field-Methods-Manual.pdf, accessed 12/16/2022] having a flat (without protruding and moving parts) anodized, anti-corrosion milled aluminum body. Inside the case, in a chamber filled with a special frost-resistant liquid, a rotating disk with two scales is installed, designed to measure from a distance of 15 and 20 m.

A disadvantage of the well-known forest taxation altimeter Suunto PM-5/1520 is the inconvenience associated with the difficulty of establishing the measurement point, which must be at a certain distance from the object of measurement. This requires the use of an additional measuring tool, such as a measuring tape, to establish a predetermined distance from the object being measured.

The technical result of the proposed altimeter with control of the distance to the measurement object is to provide visual control of the base measurement distance in relation to the object being measured, which helps to reduce the complexity of work when measuring the heights of objects by eliminating the need to use additional measuring devices when choosing a measurement point.

The technical result is achieved by the fact that in the altimeter with control of the distance to the object of measurement, including a housing with a measuring scale, a bar is attached to the housing, along the edges of which two directional laser emitters are installed, generating radiation in the visible range and a laser beam cross-sectional shape that is different from each other, moreover, the laser emitters are oriented so that the laser beams emitted by them intersect at a point at a distance from the bar corresponding to the base measurement distance when using the altimeter measuring scale.

In FIG. 1 shows a diagram of the use of an altimeter with control of the distance to the object of measurement.

In FIG. 2 shows view A from the scheme of using an altimeter with control of the distance to the measurement object.

The altimeter with control of the distance to the object of measurement includes a body 1 with a measuring scale for determining the height of a tree 2. A bar 3 is attached to the body 1. Fastening can be carried out, for example, by means of a clamp 9 or in any other convenient way. Two directional laser emitters 4, 5 are installed along the edges of the bar 3. Laser emitters 4, 5 generate radiation in the visible range and a laser beam cross-sectional shape that is different from each other. For example, emitter 4 emits a beam of circular section 6, and emitter 5 emits a beam of triangular section 7. The laser emitters 4, 5 are oriented in such a way that the laser beams 6, 7 emitted by them intersect at a point at a distance (P) from the bar 3, corresponding to the base measurement distance when using the altimeter measuring scale. For example, if the altimeter scale provides for measurement from a distance of 15 m, then the laser beams 6, 7 should also intersect at a distance of 15 m from the bar 3.

Altimeter with distance control to the object of measurement works as follows.

The researcher 8 selects the tree to be measured 2. Turns on the laser emitters 4, 5. Directs the laser beams 6, 7 onto the trunk of the tree to be measured 2. Looks at the view of the projection of the laser beams onto the tree trunk. If the projections of laser beams 6, 7 are superimposed on each other, then the researcher is at the base distance (P) from the tree and can measure the height of the tree on the altimeter scale. If the projection of beam 6 is below the projection of beam 7, then the researcher is closer than required to the tree trunk and he needs to increase the distance between him and the measured tree trunk until the projections of beams 6, 7 are aligned on the tree trunk. If the projection of beam 6 is higher than the projection of beam 7, then the researcher is too far from the tree trunk and he needs to reduce the distance between him and the tree trunk until the projections of beams 6, 7 are aligned on the tree trunk. When the projections of the beams 6, 7 are combined on the tree trunk, it is possible to measure the height of the tree using the altimeter scale enclosed in the body 1.

Due to the fact that the emitters generate radiation in the visible range, it is possible to visually control the reference point of the distance to the measured object.

Due to the fact that the emitters emit directional laser beams of a different cross-sectional shape, by their projection onto the trunk of the tree being measured, it is possible to control the base distance of the measurement in relation to the object being measured and the direction in which the researcher needs to move to comply with it - approach or move away from the measured object.

Thus, the whole set of features that characterize the altimeter with control of the distance to the measurement object provides visual control of the base measurement distance in relation to the object being measured, which helps to reduce the laboriousness of work when measuring the heights of objects by eliminating the need to use additional measuring devices when determining the point of measurement. measurements.

Claims (1)

An altimeter with control of the distance to the measurement object, including a housing with a measuring scale, characterized in that a bar is attached to the housing, along the edges of which two directional laser emitters are installed, generating radiation in the visible range and having a laser beam cross-sectional shape that is different from each other, moreover, the laser emitters are oriented in such a way that the laser beams emitted by them intersect at a point at a distance from the bar corresponding to the base measurement distance when using the altimeter measuring scale.

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