RU2363149C1 - Electronic forest tree calipper - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: electronic forest tree calliper includes guideline, immovable leg, rigidly fixed on guideline, slide block, movable leg and compensator, fixed on slide block. Slide block is manufactured from nonmagnetic material and outfitted by Hall's sensor, integrated circuit of signal conditioning with electronic send-receive, display, passive magnet for slide block fixation on guideline, power supply element. Guideline is implemented from nonmagnetic material and outfitted by passive magnet after each 1 cm according to the scale.

EFFECT: maintainability increasing of the device, diametre measurement, calculation of wood volume on place by the received diametre.

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Description

The invention relates to forestry, in particular to hand tools for measuring the diameter of trees.

A known device for measuring the diameter of a trunk of a growing tree, containing a tablet with a hinged measuring fork (application No. 2002116018, G01B 5/08, 03/10/2004).

For the prototype of the invention taken forest measuring fork (RF patent No. 2189731, A01G 23/00, 09/27/2002).

The disadvantage of these structures is the need to record measurement data on paper, followed by calculation of the volumes of all measured trees. The disadvantage of the prototype is the lack of a device for fixing the slider at the desired user scale.

The invention solves the problem of improving the usability of a diameter measuring device, calculating the volume of a tree in place from the obtained diameter.

To do this, in an electronic forest measuring fork, including a ruler, a fixed leg rigidly fixed to the ruler, a slider, a movable leg and a compensator fixed on a slider, according to the invention, the slider is made of non-magnetic material and equipped with a Hall sensor, an integrated signal conversion chip with electronic memory, a display, a passive magnet for fixing the slide on the ruler, a battery, and the ruler, also made of non-magnetic material, is equipped with passive magnets after 1 cm in accordance on the scale.

Figure 1 shows the proposed electronic forest measuring fork (to simplify the drawing shows only a fragment of the dial with magnets); figure 2 is a section A1-A1 in close-up, figure 3 is a section A2-A2 in close-up, figure 4 is a figure explaining the principle of operation of the Hall sensor.

The electronic forest measuring fork includes a ruler 1 (made, for example, from aluminum) with passive magnets 2 built in over the entire length of 1 cm, a fixed leg 3, rigidly fixed to the ruler, a movable leg 4, a slider 5 (also made of aluminum) with a rigid the housing 6 of the integrated circuit 7 mounted on it, including a display 8, a control button 9, a Hall sensor 10, a plug 11 for transmitting data to a personal computer, a battery 12 and a passive magnet 13. At the end of the line there is a removable stop 14, which prevents itself roizvolny coming off the slide with a ruler.

When measuring the diameter of the tree, the slider 5 with the movable leg 4 is diverted from the fixed leg 3 by an amount exceeding the diameter of the trunk. Then they grab the barrel and clamp it between legs 3 and 4. When the device is turned on, power is supplied to the Hall sensor 10. The action of this element is based on the Hall effect, which is "the appearance of a transverse potential difference when an electric current passes in a transverse magnetic field". The Hall element is a plate of semiconductor material, on which four contacts are located. Contacts 15 and 16 are called current, and contacts 17 and 18 are output or measuring (see A. Kobus, Y. Tushinsky. "Hall sensors and magnetoresistors." M.: Energy, 1971). When the slider passes 1 cm along the ruler from the closed position of legs 3 and 4, the Hall sensor enters the magnetic field of the first passive magnet 2 located on the ruler and gives an EMF Hall. This EMF is a signal for an integrated circuit. After signal processing, “1” appears on the display. When the slider moves along the magnetic ruler, the signals from the Hall sensor are added up, corresponding to the number of passive magnets passed 2 and the distance traveled in cm is indicated on the display. The Hall sensor has a low inertia, but there remains the need to limit the speed of the slide on the ruler to ensure the accuracy of the instrument. As such a limiter is a passive magnet 13 located on a slider. It is attracted to passive magnets 2 on the ruler and not only limits the speed of the slide on the ruler, but also fixes the slider at the desired level for the user. After breeding legs 3 and 4 by an amount exceeding the diameter of the tree by pressing the “And” button (measurement), the integrated circuit switches from the “addition of signals” mode to the “subtracting signals” mode (during operation, the “And” button switches from one mode to the other and vice versa, the arrow on the display shows the direction in which the device is currently operating). In this mode, when the slider moves in the opposite direction, the readings on the display decrease. When the tree is captured by the legs, the user presses the “P” button (memory), and the readings of the device are recorded in the microchip memory under its measurement number, when the “P” button is pressed again, the tree volume is calculated in accordance with the standard volume tables, this parameter is also recorded in memory. Since the device itself is fixed in the selected position, there is no need to carry out the entire algorithm of actions, capturing the tree with the legs of the device. With a certain skill, it is possible to carry out these actions along the way from one tree to another, saving time.

It should be noted that the traditional taxation measurements are carried out by three workers - the first measures, the second records the diameter, the third marks the tree. When using an electronic forest measuring fork, the second worker is excluded.

Claims (1)

An electronic forest measuring fork, including a ruler, a fixed leg rigidly fixed on the ruler, a slider, a movable leg and a compensator fixed on a slider, characterized in that the slider is made of non-magnetic material and equipped with a Hall sensor, an integrated signal conversion chip with electronic memory, a display , a passive magnet for fixing the slider on the ruler, a battery, and the ruler is made of non-magnetic material and equipped with passive magnets through 1 cm in accordance with the scale.

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