JPH09280857A - Level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a level capable of measuring an inclination degree of a plane to be measured with high accuracy without generating a reading error, etc. SOLUTION: This level to measure an inclination degree of a plane to be measured by using bubble tube 2 where a liquid 3 and a bubble 4 are enclosed is provided with a light emitting element 1 on one side holding the bubble tube 2 there between; two light receiving elements 5 and 6 are arranged side by side on the other side holding the bubble tube 2 there between along a longitudinal direction of the bubble tube 2; the light emitted from the element 1 is arranged to be received by the two elements 5 and 6 through the liquid 3 or bubble 4 enclosed in the bubble tube 2; by defining a quantity of light receiving by one element 5 arranged side by as (a), and defining a quantity of the light received by the other element 6 as (b), a detection part 7 to detect a difference between light quantities (a) and (b), and a conversion means to convert the light quantity difference to an electric signal are provided; and an inclination display means working on this conversed means is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level.

[0002]

2. Description of the Related Art
A level gauge that measures the degree of inclination of the surface to be measured using a bubble tube containing liquid and bubbles measures the degree of inclination of the surface to be measured by visually observing the position of the bubble based on the scale displayed on the bubble tube. are doing.

In the measuring method as described above, there is a problem that the measurement accuracy of the inclination degree of the surface to be measured is accompanied by an error of visual judgment, and the measurement accuracy is not so good because there is a difference depending on the operator. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems of the prior art and to provide a spirit level capable of measuring the inclination degree of a surface to be measured with high accuracy without causing a reading error or the like.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

In a spirit level for measuring the degree of inclination of a surface to be measured using a bubble tube 2 in which a liquid 3 and a bubble 4 are enclosed, a light emitting element 1 is arranged on one side of the bubble tube 2 and the bubble tube Two
Two light receiving elements 5 and 6 are arranged side by side along the longitudinal direction of the bubble tube 2 on the opposite side with the liquid 3 or bubble 4 in which the light emitted from the light emitting element 1 is enclosed in the bubble tube 2. To be received by the two light receiving elements 5 and 6, and the amount of light received by one of the light receiving elements A5 arranged in parallel is a, and the amount of light received by the other light receiving element 6 is b as a
According to a level, characterized in that a detector 7 for detecting the difference in light amount between the light beams b and b and a conversion means for converting the light amount difference into an electric signal are provided, and an inclination display means operated by the conversion means is provided. Is.

The bubble level 4 and the liquid 3 sealed in the bubble tube 2 are characterized in that the bubble 4 allows light to pass through and the liquid 3 blocks light. It is related to.

The light emitting element 1 provided on one side of the bubble tube 2 is a single light emitting element 1, and the light emitted from the light emitting element 1 is a bubble tube at a reference point of the inclination degree of the surface to be measured. The level bubble according to any one of claims 1 and 2, wherein light is received by the entire bubble 4 enclosed in 2.

Further, the tilt display means emits a different sound according to the size of the tilt angle, or a light emitting system that emits different colors according to the size of the tilt angle.
Alternatively, the level gauge according to any one of claims 1 to 3, wherein a numerical value display system for displaying the magnitude of the tilt angle by a numerical value is used.

The operation sensor of an inclination correction mechanism for correcting and adjusting the inclination degree of the installation surface is constructed so that it can be attached to the installation surface, according to any one of claims 1 to 4. Of the electronic level.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (how to carry out the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

The light emitting device 1 is provided on one side of the bubble tube 2.
When the light receiving element 5 and the light receiving element 6 are arranged side by side in the longitudinal direction on the opposite side of the bubble tube 2, the light emitted from the light emitting element 1 passes through the liquid 3 or the bubble 4 sealed in the bubble tube 2 and the light receiving element. 5 and the light receiving element 6, the amount of light received by the light receiving element 5 is a, and the amount of light received by the light receiving element 6 is b, and a detection unit 7 for detecting a light amount difference between a and b, and When the conversion means for converting the difference in light quantity into an electric signal is provided and the tilt display means operated by the conversion means is provided, the difference in light quantity between a and b is converted into an electric signal, and the converted electric signal is the surface to be measured. Is converted to the tilt angle of.

According to the second aspect of the present invention, regarding the bubble 4 and the liquid 3 enclosed in the bubble tube 2, if the bubble 4 passes light and the liquid 3 blocks the light, the inclination of the measured surface The bubbles 4 move in the bubble tube 2 depending on the degree, but in this case, the light emitted from the light emitting element 1 passes through only the bubbles 4, so that the fluctuations of the light received by the light receiving elements 5 and 6 are the largest. Become. Therefore, the inclination degree of the surface to be measured can be measured with high accuracy. According to the third aspect of the present invention, when the light emitting element 1 provided on one side of the bubble tube 2 is one light emitting element 1, a large number of light emitting elements 1 are provided for the fluctuation of the light emitted from the light emission blocking 1. It is possible to reduce the variation of the measured value of the inclination degree of the measured surface due to the variation of the light received by the light receiving elements 5 and 6, and the inclination degree of the measured surface is highly accurate. Can be measured.

According to a fourth aspect of the present invention, a buzzer system that generates different sounds depending on the size of the converted tilt angle, or a light emission that generates different colors depending on the size of the tilt angle. By adopting the system or the numerical display system that displays the size of the tilt angle numerically,
The tilt can be displayed on each tilt display means.

Therefore, the inclination of the surface to be measured can be measured with high accuracy without causing a reading error.

According to the fifth aspect of the present invention, since the spirit level of the present invention can be attached to the installation surface, it can be used as an operation sensor of an inclination correction mechanism for correcting and adjusting the inclination degree of the installation surface. You can

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A spirit level according to an embodiment of the present invention will be described with reference to the drawings.

A light emitting element 1 such as a light emitting diode is provided on one side of the bubble tube 2 provided inside the level, and a light receiving element 5 and a light receiving element are provided on the opposite side of the bubble tube 2 along the longitudinal direction of the bubble tube 2. Two light receiving elements 5 and 6 including photodiodes of the element 6 are arranged in parallel.

The amount of light emitted from the light emitting element 1 passes through the liquid 3 or the air bubble 4 sealed in the bubble tube 2, is received by the light receiving elements 5 and 6, and is received by the light receiving element 5. Is denoted by a, and the amount of light received by the light receiving element 6 is denoted by b, a detection unit 7 for detecting a light amount difference between a and b and a converter 8 for converting the light amount difference into an electric signal are provided, and the converted electric signal Is provided to convert the angle of inclination into the inclination angle of the surface to be measured, and the inclination angle is displayed on the inclination display section 10 provided in a part of the level.

For example, assuming that the difference in light quantity is c, a value when the inclination angle of the measured surface is horizontal is set as a reference value, and the inclination angle of the measured surface can be measured by comparison with this reference value. .

Therefore, the case where there is no difference in the amount of light between a and b does not necessarily have to be the case when the tilt angle of the surface to be measured is horizontal.

Further, the light receiving element 5 and the light receiving element 6 do not necessarily have to be installed symmetrically with respect to the longitudinal direction of the bubble tube 2.

In addition to the numerical display method, a buzzer method that generates different sounds depending on the size of the converted tilt angle, a light emitting method that generates different colors depending on the size of the tilt angle, etc. The tilt display means can display the tilt.

The simplest type of inclination display means will be described. For example, when the inclination angle is substantially horizontal and the horizontal state is within the allowable range, an OK buzzer sounds or a horizontal buzzer is used. It is possible to adopt a light emission method such as green display when the condition is within the allowable range, red display when the condition is outside the allowable range and tilting to the right, and yellow display when the condition is outside the allowable range and tilting to the left.

The number of the light emitting element 1 may be one or plural depending on the specification conditions. However, it is possible to measure with high accuracy if one light emitting element is used because it is not affected by variations in the light emitting amount of the light emitting element 1. Become.

That is, if there are a plurality of light emitting elements 1, a measurement error is likely to occur due to variations in the amount of light emitted between the elements.

An example of this embodiment is shown in FIG. 1. In this case, the inclination angle of the surface to be measured is set to be horizontal with the bubble 4 sealed in the middle position in the longitudinal direction of the bubble tube 2. The light emitting element 1 is provided with one light emitting element 1 on each side of the bubble tube 2 with respect to an intermediate position in the longitudinal direction of the bubble tube 2, and the light receiving elements 5 and 6 sandwich the bubble tube 2. On the opposite side, the light receiving element 5 and the light receiving element 6 are provided on the front and rear sides with respect to the longitudinal intermediate position of the bubble tube 2.

With the above-mentioned structure, for example, when equivalent light is emitted from each light emitting element 1, the emitted light passes through the bubble 4 or the liquid 3 enclosed in the bubble tube 2 and the light receiving element. The same amount of light is received by 5 and the light receiving element 6.

If the liquid 3 sealed in the bubble tube 2 is a green liquid 3 that blocks light, the light received by the light receiving element 5 and the light receiving element 6 passes through the bubble 4 sealed in the bubble tube 2. It becomes the light.

The liquid 3 sealed in the bubble tube 2 does not have to completely block the light, as long as it has a difference from the light passing efficiency of the light passing through the bubble 4, and contrary to the above, the bubble 4 can block the light. Alternatively, the liquid 3 may allow light to pass therethrough.

In short, it suffices that the liquid 3 and the bubbles 4 sealed in the bubble tube 2 have different transmission efficiencies for passing light. However, in order to measure the tilt angle of the surface to be measured with higher accuracy, it is better that there is a large difference in light transmission efficiency between the liquid 3 and the bubbles 4, and the most preferable one is the liquid 3 and the bubbles. Four
It is preferable that either one of them can completely block light and the other one can completely transmit light.

In the above embodiment, when the light passes through the bubble 4 and the green liquid 3 blocks the light, for example, as shown in FIG.
When the tilt angle of the surface to be measured changes and the bubble 4 moves upward, the amount a of light received by the light receiving element 5 increases and the amount b of light received by the light receiving element 6 decreases. In this case, a and b
This difference is represented by c, and this relationship is first converted into an electric signal by the converter 8, and then the converted electric signal is converted into an inclination angle by the converter 9 to form a part of the level. The tilt angle converted to the tilt display section 10 provided can be displayed as a number.

Next, when the inclination angle of the surface to be measured changes in reverse to the above and the bubble moves downward in FIG. 1, the amount of light a received by the light receiving element 5 decreases and the light receiving element 6 receives the light. The amount of light b increases. In this case, similarly to the above, the tilt angle of the measured surface is displayed on the tilt display unit 10 by the light amount difference c between a and b.

The relationship between the difference in light quantity and the inclination angle of the surface to be measured is
The value of the tilt angle of the measured surface corresponding to the light amount difference is set in advance, and the tilt angle of the measured surface can be displayed numerically according to the light amount difference at the time of measurement.

Further, the spirit level of this embodiment is constructed so that it can be attached to the installation surface as an operation sensor of an inclination correction mechanism for correcting and adjusting the inclination degree of the installation surface. Specifically, a tilt correction mechanism capable of vertical movement and tilt adjustment by driving a motor or the like is provided, and a mounting surface such as a table is provided on the tilt correction mechanism, and the spirit level of this embodiment is attached to this mounting surface. To do.

Then, in order to correct and adjust the degree of inclination of the installation surface, a level level attached to the installation surface and an inclination correction mechanism are electrically connected. For example, when the installation surface is not horizontal,
An electric signal is sent from the level to the tilt correction mechanism to drive the tilt correction mechanism by driving the tilt correction mechanism to make the installation surface horizontal by correcting and adjusting the tilt degree of the installation surface. Therefore, when it is desired to make the installation surface horizontal or to have a desired inclined surface, it is possible to easily set the installation surface to a desired inclination angle with high accuracy by attaching a level to the installation surface. The level can be effectively used as an operation sensor of a tilt correction mechanism that corrects and adjusts the degree of tilt of the installation surface.

Further, when the installation surface is in a horizontal state, a buzzer sound or the like may be generated to notify that the desired state is reached.

In the description of the above embodiments, the tilt angle of the surface to be measured is mainly based on the horizontal state, but the spirit level of the present invention is not limited to the horizontal state.
It can handle all things that can be handled by conventional spirit level, such as those based on the vertical state and those based on the right angle state, and at the same time, one function, for example, the one based on the horizontal state, is orthogonalized. It may be configured to be able to measure the inclination of the direction, or to be capable of measuring the inclination of three or more directions in which the other two directions are added to the two orthogonal directions, or a configuration in which two or more functions are appropriately combined. Is also good.

[0039]

As described above, according to the present invention, since the light emitting element is provided on one side of the bubble tube and the two light receiving elements are arranged side by side in the longitudinal direction on the opposite side of the bubble tube, light is emitted from the light emitting element. The light passing through the liquid or the air bubble sealed in the bubble tube, and a detection unit for detecting the light amount difference between the light amounts a and b received by the light receiving element, and a conversion means for converting the light amount difference into an electric signal. Provided,
Since the tilt display means operated by this converting means is provided, the light amount difference between a and b is converted into an electric signal, and the converted electric signal is converted into the tilt angle of the surface to be measured.

Therefore, instead of visually determining the position of the bubble based on the scale displayed on the bubble tube as in the conventional case, the amount of fluctuation of the light passing through the bubble tube according to the degree of inclination of the surface to be measured is measured by an electric signal. Since it is possible to display the degree of inclination of the surface to be measured by this electrical signal, there is no error such as visual judgment, there is no difference between measurement persons, and the degree of inclination of the surface to be measured is always present. Can be measured with high accuracy.

Since two light emitting elements are provided, this
It is possible to measure the degree of inclination of the surface to be measured by the fluctuation amount of the light received by each light receiving element.When manufacturing the level, for example, when setting the horizontal reference value of the level,
In the past, it was necessary to set the position of the bubble in the bubble tube at the horizontal reference value at the center of the bubble tube with high precision to manufacture a level, and it was very difficult to manufacture a high-precision level. However, in the present invention, it is possible to easily set the light amount difference between the two light receiving elements corresponding to the horizontal reference value, and to easily set the tilt display corresponding to the horizontal reference of the spirit level. Can be manufactured with high accuracy, and the inclination degree of the surface to be measured using this level can be measured with extremely high accuracy.

According to the second aspect of the invention, regarding the bubble and the liquid enclosed in the bubble tube, the bubble passes the light and the liquid blocks the light. Therefore, depending on the degree of inclination of the surface to be measured. The bubbles move in the bubble tube, but in this case, the light emitted from the light emitting element passes only through the bubbles, so that the fluctuation of the light received by the light receiving element becomes the largest. Therefore, the inclination degree of the surface to be measured can be measured with high accuracy.

According to the third aspect of the invention, since the light emitting element provided on one side of the bubble tube is one light emitting element,
The fluctuation of the light emitted from the light emitting element can be reduced as compared with the case where a large number of light emitting elements are provided, and the fluctuation of the measurement value of the inclination degree of the measured surface due to the fluctuation of the light received by the light receiving element is reduced. Therefore, the degree of inclination of the surface to be measured can be measured with high accuracy.

According to the fourth aspect of the present invention, a buzzer system that generates different sounds according to the size of the converted tilt angle or a light emission that generates different colors depending on the size of the tilt angle. By adopting the system or the numerical display system that displays the size of the tilt angle numerically,
The tilt can be displayed on each tilt display means.

Therefore, the inclination of the surface to be measured can be measured with high accuracy without causing a reading error.

Further, instead of visually determining the position of the bubble with reference to the scale displayed on the bubble tube as in the prior art, the inclination angle of the surface to be measured can be displayed by a number, sound or light. The degree of inclination of the surface to be measured can always be measured with high accuracy without causing an error such as a visual judgment and causing a difference among measuring persons.

According to the fifth aspect of the present invention, since the spirit level of the present invention can be attached to the installation surface, it can be used as an actuation sensor of an inclination correction mechanism for correcting and adjusting the inclination degree of the installation surface. You can

Therefore, when it is desired to make the installation surface horizontal or to have a desired inclined surface, it is possible to easily set the installation surface to a desired inclination angle with high accuracy by attaching a level to the installation surface.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a main part of a spirit level according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic overall configuration of a spirit level according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a schematic operation principle of a spirit level according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a conventional spirit level.

FIG. 5 is a plan view showing an example of measurement with a conventional spirit level.

[Explanation of symbols]

 1 Light emitting element 2 Bubble tube 3 Liquid 4 Bubble 5 Light receiving element 6 Light receiving element 7 Detector

Claims (5)

[Claims] 1. A level instrument for measuring the degree of inclination of a surface to be measured using a bubble tube containing liquid and bubbles, wherein a light emitting element is arranged on one side of the bubble tube, and the opposite side of the bubble tube is sandwiched. On the side, two light receiving elements are arranged side by side along the longitudinal direction of the bubble tube, and the light emitted from the light emitting element passes through the liquid or bubbles sealed in the bubble tube and is received by the two light receiving elements. Thus, the amount of light received by one of the light receiving elements arranged in parallel is a, and the amount of light received by the other light receiving element is b, and a detector for detecting the light amount difference between a and b and A leveling device comprising conversion means for converting a difference in light quantity into an electric signal, and inclination display means operated by the conversion means. 2. The level according to claim 1, wherein the bubble and the liquid enclosed in the bubble tube are arranged such that the bubble allows light to pass therethrough and the liquid blocks light. 3. The light emitting element provided on one side of the bubble tube is one light emitting element, and the light emitted from the light emitting element is enclosed in the bubble tube at a reference point of the inclination degree of the surface to be measured. The level level according to claim 1, wherein the entire bubble is received. 4. The buzzer system for generating different sounds according to the size of the tilt angle, the light emitting system for emitting different colors according to the size of the tilt angle, or the size of the tilt angle for the tilt display means. The level indicator according to any one of claims 1 to 3, wherein the level indicator is a numerical value display system. 5. The operation sensor of an inclination correction mechanism for correcting and adjusting the inclination degree of an installation surface, which is configured to be attached to the installation surface, according to any one of claims 1 to 4. Level.