SI9800162A - Inclination measuring by electronic water scale - Google Patents

Abstract

The invention deals with an electronic scale for measuring inclinations from 0 to 360 degrees. Inside a round tube, which is wound to a round circle and is only partially filled with an electrically conductive liquid features around its total circumference a resistor in the form of a wire with evenly decreasing cross section. Therefore the system resistivity depends on the location of the bubble. The resistivity is measured and the angle is calculated with the result being shown on the display. The chassis can be more or less filled with liquid. Externally side coils can be located very close one to the other, where each coil is individually connected to the measuring device. If the wire inside is connected to voltage, induced voltage will be produced in all coils. The location of the bubble causes the induced voltage to differ on this particular spot from all other locations. By measuring voltages of all coils in series it is possible to determine the current location of the bubble. A metal ball can replace the bubble and the internal wire.

Description

ELECTRONIC WEIGHTING WEIGHT

The subject of the invention is an electronic scale for measuring inclination from 0 to 360 degrees. It is intended for general use in construction, mechanical engineering, household, etc. and for special purposes where high accuracy is required, such as in laboratories, military equipment, etc.

This invention will solve three problems.

Problem 1.

The accuracy of the slope reading should not depend on the visual ability of the individual user.

Problem 2.

All angles of inclination, from 0 to 360 degrees, should be read.

Problem 3

In certain applications, a very accurate measurement of the inclination with respect to the direction of gravity is required.

Known solutions to these problems.

The following patents are known to address similar problems. Namely:

US, A, 1 826 731 (CHATHAM), 10/13/1931. The housing is in the form of a transparent cylindrical container, which is half filled with liquid and above it is an air bubble. The scale for measuring angles is printed on a transparent container. The fluid level indicates the slope in degrees.

US, A, 2 287 863 (BUCKLEY), 6/30/1942. The case is in the form of a round transparent tube, which is curved into a circular ring. It is filled with liquid so that there is a small air bubble at the top. The corner rock is imprinted on the case. The air bubble shows the slope in degrees.

DE, C, 878 726 (KLEINHANS), 9/18/1952. The housing is in the form of a round transparent tube, which is curved into a circular ring and half filled with liquid. The corner rock is imprinted on the case. The fluid level indicates the slope in degrees.

However, no known construction contains solutions to all three of the above problems simultaneously. The accuracy of the reading depends on the user's ability. High accuracy is not guaranteed.

The solution to the problems of the present invention.

Problem Solving 1,2 and 3.

Measurement of inclination is performed using an electric instrument. A very accurate value is displayed on the screen in the form of numbers. There are four possible solutions.

1.1. The housing formed by a circular tube coiled into a circular ring partially filled with electrically conductive fluid. A housing is mounted around the perimeter around the perimeter in the form of a wire that varies uniformly in cross section. If an electrical voltage is connected to the wire, the current resistance of the system can be measured with a suitable instrument. The current flows part of the way through the electrically conductive fluid, where there is an air bubble, only through the wire. As the cross section of the wire varies with length, the resistance of the part of the wire that is dry in the air bubble depends on where the air bubble is. The resistance of the whole system, however, is the sum of both resistors. The system resistance value can be accurately measured and displayed on the screen. In this case, the ring-shaped housing may be more or less filled with liquid. In other words, the air bubble may be short to cover only a few angular degrees, or long, to 180 angular degrees. The housing may also take the form of a round cylindrical container, which is half filled with liquid.

1.2. A housing formed by a circular tube coiled into a circular coil partly filled with electrically conductive fluid. A housing with a wire-shaped resistor is installed throughout the perimeter and has the same cross-section along its entire length. Coils are mounted on the outside of the housing. The entire coils are covered by coils, which are located close to each other or partially overlap. Each coil is separately connected to the measuring instrument. If AC power is connected to the wire inside, AC voltage is induced in all coils. Because the conditions on the part of the ring where the air bubble is different from elsewhere, the induced voltage in the coils of this area is also different. By successively meditating in all the coils, we can determine exactly where the air bubble is currently located. In doing so, the electrical properties of all coils must be precisely known. In this case, too, the bubble may be short or long and have a circular-shaped housing or a round cylindrical container that is half filled with liquid.

1.3. The housing formed by a circular tube coiled into a circular ring partially filled with electrically conductive fluid. A housing is mounted around the perimeter around the perimeter in the form of a wire that varies uniformly in cross section. Coils are mounted on the outside of the housing. In this case, the induced alternating voltage in the outer coils also varies along the length of the bubble. At one end of the bubble, the induced voltage is greater, and then it drops evenly to the other end. It is easier to determine exactly the beginning and end of a bubble from two types of data than from one type alone. The measurement is more accurate.

1.4. A metal-ferrite bead is mounted in a housing formed by a circular tube coiled into a circular ring. The diameter of the ball is slightly smaller than the diameter of the tube so that the ball can roll freely here and there. Coils are mounted on the outside of the housing. If a high-frequency electrical current is passed through each coil, sequential measurement in the coils can determine exactly where the ball is currently located. In doing so, the electrical properties of all coils must be precisely known. The housing can also be filled with liquid.

The housing formed by a circular tube coiled into a circular ring containing a metal ball is filled with electrically conductive fluid. If the liquid is connected to a voltage, voltage is induced in all coils. Since the conditions on the part of the ring where the metal ball is different from elsewhere, the induced voltage in the coils of this region is also different. By measuring the values of the induced voltage in this area, the vertical center axis of the ball can be calculated and thus the angle of inclination.

The housing formed by a circular tube wound into a circular ring containing a metal ball is made of metal or other electrically conductive material. The inside of the case is fluid free. If the housing is connected to an electrical voltage, voltage is induced in all coils. Since the conditions on the part of the ring where the metal ball is different from elsewhere, the induced voltage in the coils of this region is also different.

The advantage of all four of these solutions, in addition to accurate measurement and reading, which does not depend on the visual ability of the user, is that they allow the measurement of gradients from 0 to 360 degrees. The accuracy of the measurement itself can be very high. It depends on the quality of the fabrication of the resistance wire, the housing and the ball, the number of coils and the accuracy of the coil calibration. The disadvantage is that the induced voltage in each coil must be measured separately. This means that as many turns are required as there are coils. However, the measurement is more accurate if there are more coils and overlap as much as possible.

Design solutions

Design solutions are shown in seven examples.

Exemplary Example 1 is shown in Figure 1

In the outer housing (101), which is placed on a plane (104) whose inclination is to be measured, a built-in housing (1) formed by a round tube is wound into a circular ring. The housing (1) is partially filled with electrically conductive fluid (2). A resistor in the form of a wire (4) is mounted throughout the circumference, with a uniform cross section. If an electrical voltage is connected to the wire, the current resistance of the system can be measured. The current flows part of the path through the electrically conductive fluid, where the air bubble (3) is only through the wire. As the cross-section of the wire varies with length, the resistance of that part of the wire that is dry in the air bubble depends on where the air bubble is. The resistance value can be accurately measured with the instrument (103) and converted to angular degrees, in the form of a number, displayed on the screen (102).

Embodiment 2 is shown in Figure 2

The housing (7) has an air bubble (3) that is large enough to meet the entire cross-section of the tube and can extend up to 180 angular degrees in length. The wire is indicated by (4), the filling fluid by (2), the voltage connectors by (5, 6).

Embodiment 3 is shown in Figure 3

The housing (8) is in the form of a cylindrical container half filled with liquid (2), above which is the air bladder (3). The wire is indicated by (4), the voltage terminals by (5, 6).

Embodiment 4 is shown in Figures 4, 8, 9 and 10.

Figure 4 shows a housing (1) formed by a circular tube coiled into circular rings partially filled with an electrically conductive fluid (2). A resistor in the form of a wire (4) is installed throughout the enclosure, having a uniform or variable cross section and voltage connections (5, 6) along the entire length. Coils (9) are mounted on the outside of the housing. The coils can be wound around the housing or mounted next to the housing. The entire coils are covered by coils, which are located close to each other or partially overlap. Each coil is separately connected to the measuring instrument. If AC power is connected to the wire inside, AC voltage is induced in all coils. Since the conditions on the part of the ring where the air bubble is different are different from elsewhere, the induced voltage in the coils of this area is also different. By sequentially measuring in all the coils, we can determine exactly where the air bubble is currently located. In doing so, the electrical properties of all coils must be precisely known.

If the wire has a uniformly variable cross section, the induced AC voltage in the outer coils varies uniformly at the same time along the length of the bubble. At one end of the bubble, the induced voltage is greater, and then it drops evenly to the other end. It is easier to determine exactly the beginning and end of a bubble from two types of data than from one type alone. The measurement is more accurate.

Figure 8 shows the results (16) of the measurement of the induced voltage in individual coils along the circumference of the tube. The voltage is indicated by (U) and the serial number of the coil by (n). The air bubble in the housing is indicated by (3), the wire by (4) and by (L) the bubble length. The induced voltage (U) outside the bubble region (3) is the same in all coils. At the beginning of the bubble, however, it changes and gradually increases to its maximum value.

In the bubble region, the voltage across all coils is the same again, and finally it gradually drops to the value outside the bubble. By interpolating the values of the induced voltages, it is possible to radiate exactly where the center of the bubble is and thus the angle of inclination. The results shown are such that the wire (4) is the same cross-section along its entire length.

Figure 9 shows an arrangement of coils (9) that are arranged side by side on the housing (1). The air bubble is (3) and (4) is the wire inside the housing.

Figure 10 shows the switching arrangement of the coils (9) on the housing (1). The air bubble is (3) and (4) is the wire inside the housing.

Embodiment 5 is shown in Figure 5

In the housing (7) there is a fluid (2) 'm air bubble (3) which can range up to 180 degree angles. The wire (4) is in the housing and the coils (9) are outside the housing aii but are adjacent to the housing. Wire tension connections are (5, 6).

Embodiment 6 is shown in Figure 6

The cylindrical housing (14) contains fluid (2) and an air bubble (3), which can range up to 180 degree angles. The wire (4) has connectors (5,6). The outer coils are (9). The coils are arranged so that the coil axis is perpendicular to the tangent to the wire axis (4).

Exemplary examples 7 are shown in Figure 7

A metal-ferrite bead (15) is housed in a housing (1) formed by a circular tube coiled into a circular ring. The rest of the housing may be empty or filled with liquid (2). The diameter of the ball is slightly smaller than the diameter of the tube so that the ball can roll freely here and there. Coils (9) are mounted on the outside of the housing. If a high-frequency electrical current is passed through each coil, sequential measurement in all coils can determine exactly where the ball is currently located. In doing so, the electrical properties of all coils must be precisely known.

The housing (1) formed by a circular tube coiled into a circular ring containing a metal ball (15) is filled with an electrically conductive fluid (2) having electrical connections (5,6). If the liquid is connected to a voltage, voltage is induced in the coils. As the conditions on the part of the colobai where the metal ball is different from elsewhere, the induced stress in this area is also different.

The housing (1) formed by a round tube, coiled into a ring containing a metal ball (15) and having electrical connections (5,6), is made of metal or other electrically conductive material. The inside of the case is fluid free. If the housing is connected to an electrical voltage, voltage is induced in all coils. As the conditions on the part of the colobai where the metal ball is different from elsewhere, the induced voltage in the coils of this region is also different.

Claims (13)

An electronic 0 to 360 degree inclination balancer, shaped like a round tube, which is only partially filled with a fluid (2), characterized in that the fluid (2) with which it is partially filled housing (1), electrically conductive and housed in a housing (1) along the circumference of a wire (4) whose cross section is uniformly rotated over the whole length so that part of the wire (4) is not wetted by fluid (2) but passes through the air the bubble (3) and having wire (4) connectors (5,6) to which the power supply is connected, and a measuring instrument (103) and a screen (102) for displaying the angle in the form of a number. Electronic balance according to claim 1, characterized in that the housing (7) is only half filled with an electrically conductive fluid (2). An electronic balance according to claim 1, characterized in that the housing (8) is in the form of a cylindrical container which is only partially or half-filled with an electrically conductive fluid (2). Electronic balance according to claim 1, characterized in that the housing (1) is made of a tube with a cross section so small that the bubble (3) completely fills the cross section of the tube. An electronic balance according to claim 1, characterized in that it has electrically separated coils (9) closely adjacent to each other on the outer periphery of the housing (1), the induced voltage (16) being individually measured in each coil. . Electronic balance according to claim 5, characterized in that the wire (4) has a uniform cross section. An electronic balance according to claim 5, characterized in that only a metal ball (15) is inside the housing. An electronic balance according to claim 7, characterized in that there is also fluid (2) inside the housing (1). An electronic balance according to claim 5, characterized in that the coils (9) overlap slightly. An electronic balance according to claim 4, characterized in that the air (3) is pressurized air. Electronic balance according to claim 8, characterized in that the fluid (2) is electrically conductive and has electrical connections (5,6). Electronic balance according to claim 7, characterized in that the housing (1) is made of metal or other electrically conductive material and has voltage connectors (5,6). Electronic balance according to claim 1, characterized in that the coils (9) are arranged so that the coil axis is perpendicular to the tangent to the wire (4).