RU2620168C1 - Device for counting number of drops - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: device for counting the number of drops, includes: a casing with an opening, a dielectric plate, two arms interconnected by the axis, a contact plate, a rocker arm located on the axis, a power source and a recorder. One of the arms is adapted to connect to the power source. The arms and the contact plate are fastened to the dielectric board, which is located inside the casing, while the rocker arm is freely located on the axis in such a way that one its arm is projected from the casing opening, and the second arm is located to contact with the contact plate. The recorder is connected to the contact plate and the current source.

EFFECT: invention provides a high device sensitivity without accumulating the fallen drops on the contact element surface, thereby the possibility of obtaining a false result is avoided.

4 cl, 2 dwg, 1 ex

Description

Technical field

The claimed invention relates to the field of laboratory equipment used in the study of drip-rain soil erosion processes, in particular when determining the number of rain drops falling into a specific narrow area of the soil. The device can be used to study soil samples in the process of studying ongoing erosion processes.

State of the art

The prior art options for the execution of devices for similar purposes.

For example, a meter for the parameters of artificial rain drops (AS USSR No. 2004002) is known, which contains a laser source mounted in a housing with a measuring chamber and is optically connected through the first, second mirrors and a lens system with a photodetector, while the meter is equipped with grids and pallets for moisture collection. A ray of light from the source enters the photodetector, and the droplets crossing it are recorded by this photodetector, and the size, amount and rate of drop of the droplet can be recorded. With a rather narrow drop drop region (measurement zone) with a certain degree of error, we can assume that the droplets that fall at one point are counted.

This device is technically difficult to implement, consists of a large number of mating nodes, which reduces its reliability in operation.

Also known rain sensor for irrigation systems (patent US 7552632).

The device is equipped with a drop former of a certain size, and the size can be selected in advance. In addition, the device includes a flat contact plate, a microcontroller. Counting drops in this case is to form the volume of irrigation. During watering, the microcontroller counts the number of drops falling on the contact plate. If enough drops accumulate, the microcontroller stops the water supply and watering stops.

According to figures 3-A and 3-B of the description of a known device, when using a sensor, a drop of a certain size (volume, weight) is formed, which falls and bends or rotates the contact plate by impact force, closing the electric circuit. In this case, the drop spreads and makes the contact plate heavier. In addition, the use of a microcontroller significantly complicates the preparation of the device for operation and reduces its reliability due to the possible failure of electronic parts.

In contrast to the known source of information, the claimed design has a light balanced rocker with an inclined end, along which the drop slides without weighing it down (such a design is more sensitive and reacts to raindrops of various sizes).

The closest in technical essence to the claimed utility model is a drip rain sensor (patent FR2612648). The known device contains a funnel-shaped accumulator from which water enters the capillary, forming a drop of a certain size (volume), which can fill the gap between the electrodes, which closes the electric circuit, acting as a conductor. To realize the purpose of the device, drops of the same size are required, which does not always correspond to the actual conditions of rain drops falling.

The proposed device, in contrast to the prototype, responds to raindrops of different sizes.

The objective of the proposed technical solution is to create a compact device for counting the number of raindrops falling at one point. A point in this context is a conditional concept and is determined by the diameter of the trace that the falling drop leaves on the surface of the hit.

The technical result achieved by using the claimed invention is to ensure high sensitivity of the device, the absence of accumulation of fallen drops on the surface of the contact element, which eliminates the possibility of obtaining a false result.

The problem is solved in that the inventive device for counting the number of drops, according to the technical solution, includes a casing with a hole, a dielectric panel, two interconnected axis of the bracket, a contact plate, a rocker located on the axis, a current source and a recorder, while the brackets, one of which is made with the possibility of connecting to a current source, and the contact plate is mounted on a dielectric panel, which is located inside the casing, and the beam is freely located on the axis in such a way That its one arm projects from the housing opening, and a second arm arranged to contact with the contact plate, wherein the recorder is connected to the contact plate and the power source. The rocker arm protruding from the opening of the casing is made with the end bent down by 15-30 °. The device is also equipped with a switch for ease of use, and an electromagnetic pulse counter (EMC) can be used as a recorder.

The invention is illustrated by the following drawings. In FIG. 1 is a schematic side view of the claimed design. In FIG. 2 schematically shows a top view of the claimed design, as well as the electrical circuit of connecting the device to a current source. The positions in the drawings indicate:

1. Dielectric panel

2. Rocker

3. Axis

4. Contact plate

5. Adjustment screw

6. squeezing washer

7. Brackets

8. Casing

9. Current source

10. Switch

11. Registrar

The inventive device is a laboratory equipment and is a compact device for studying one of the parameters of the dynamic impact of rain, namely, it provides the ability to count the number of raindrops falling when falling at one point. As mentioned above, the point in this case is a conditional concept and is determined by the minimum possible diameter of a raindrop.

The device comprises a casing 8 with the constituent elements fixed therein and an electrical circuit connected to a power source. An ordinary battery or any other autonomous current source can be used as such a current source.

The casing is a plastic box with an opening in the end part, functionally designed both to accommodate all elements of the device and to protect them from moisture and, as a result, to obtain false measurement results.

The casing is movably attached to the dielectric panel 1, which can be made, for example, of textolite or getinaksa. In turn, two brackets 7 and a contact plate 4 between them are rigidly fixed on the dielectric panel. The brackets are placed symmetrically relative to the longitudinal axis of the device and are provided with holes for mounting the axis 3. The contact plate is made of metal and has a stepped bend with the formation of shelves. A hole is made in the upper shelf of the plate for accommodating the adjusting screw 5. The screw 5 passes through the hole in the plate and is screwed into the threaded hole of the panel. The screw is equipped with a squeezing washer 6 made of an elastic material and located between the plate and the panel. On the axis connecting the two brackets, the rocker 2 of small weight (no more than 2 g) freely hangs, which is a metal curved bar having two shoulders of equal weight and a supporting part enveloping the axis. At the same time, one arm of the rocker arm has a narrowed (up to 3 mm wide) end bent down by 15-30 °. The bent portion of the arm of the rocker arm when placing the rocker arm on the axis protrudes from the opening of the casing. The mobility of the mounting of the casing to the dielectric panel provides the ability to adjust the size of the protruding end of the arm of the rocker arm. The size of the protruding part of the shoulder of the rocker arm is set in advance taking into account the expected size of the raindrops. The other arm of the beam is located in such a way that its end bent up is placed under the upper shelf of the contact plate with a gap. The size of this gap is regulated by screw 5. The beam in a static position is balanced.

The device also contains an external recorder, for example an EMF type MCF, connected on one side to the contact plate, and on the other hand through a switch with a current source, which, in turn, is connected to one of the brackets.

The contact plate, brackets, axis and beam are included in the electrical circuit of the connection of the recorder 11 with the current source 9. The inventive device operates as follows.

To activate the device, it is connected to a current source, as shown in FIG. 2, and put the switch in the on position. The device is placed in the rain and counting drops that fall at one point according to the testimony of the registrar.

When a drop of rain falls on the narrowed bent down end of the rocker arm protruding from the opening of the casing, the end of the other rocker arm moves upward until it contacts the current plate connected to the current source due to the free position of the rocker arm on the axis. The electrical circuit closes, this circuit locks the recorder. After falling on the rocker arm, the drop glides along the bent end, detaches from the rocker arm and falls down, as a result of which the rocker returns to its original position. Thus, ultimately, the total number of drops that fall on the narrowed end of the arm of the rocker arm over a certain period of time is obtained. At the same time, by tightening the squeeze washer of the adjusting screw, it becomes possible to adjust the gap between the contact plate and the rocker arm. This operation is tuning and is performed previously. The device responds to drops of different sizes (weights). The protruding end of the arm of the rocker arm is selected in accordance with the range of expected droplet sizes.

Concrete example

For the implementation of the inventive device made casing with overall dimensions of 100 × 200 mm A hole 10 × 15 mm in size is made in its end part, which ensures the course of the protruding end of the rocker arm. Inside the casing is a dielectric panel made of PCB. In accordance with the claimed features of the invention, in the casing are also placed two interconnected by an axis of the bracket and the contact plate held by the adjusting screw. On the axis hangs a beam weighing 1.4 g. The length of the arms of the beam is 22 and 25 mm, their width is 5 mm, and the thickness is 0.4 mm. The end of the arm of the beam, on which the drops fall, is bent 30 ° down, and the dimensions of the protruding part are 3 × 6 mm (in accordance with the invention, the protruding end is made narrower). The device is included in the electrical circuit in accordance with the indicated features. A 1.5 V battery was used as a current source, and a flashlight was used as a recorder. The experiment is carried out in three stages, each time for 10 minutes. Drops were counted according to the number of light bulbs that occurred as a result of the closure of the electrical circuit described above. Thus, after repeating the experiment three times, the following results were obtained:

Stage 1 - 12 sunbaths;

Stage 2 - 8 tanning beds;

Stage 3 - 10 sunbaths.

Visual control confirms the obtained experimental results.

Claims (4)

1. A device for counting the number of drops, including a casing with a hole, a dielectric panel, two brackets connected to each other by an axis, a contact plate, a rocker located on the axis, a current source and a recorder, while the brackets, one of which is made with the possibility of connecting to the source current, and the contact plate are mounted on a dielectric panel, which is placed inside the casing, and the beam is freely located on the axis so that one of its shoulders protrudes from the opening of the casing, and the second shoulder is located the chance of contact with the contact plate, wherein the recorder is connected to the contact plate and the power source. 2. The device according to claim 1, characterized in that an electromagnetic pulse counter is used as a recorder. 3. The device according to claim 1, characterized in that the rocker arm protruding from the opening of the casing is made with the end bent down by 15-30 °. 4. The device according to claim 1, characterized in that it is equipped with a switch.

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