KR20200088089A - object width measuremet method using A laser range finder - Google Patents

Abstract

The present invention relates to an object width measuring method using a laser range finder, and more specifically, to a laser range finder and an object width measuring method using the same, which parallelly install, on the main body, a first axial laser having an irradiation angle fixed to the main body and a second axial laser having a variable irradiation angle to the main body, and automatically calculates not only the distance from the object to be measured but the width of the object to be measured by using the first axial laser and the second axial laser. To this end, provided is the laser range finder comprising: a main body configuring an exterior and including a display unit which displays a measurement value; a fixed laser fixed on one side of the main body to oscillate laser to make the irradiation angle to the object to be measured a right angle and thus, measure the distance from one end unit of the object to be measured; a second axial laser axially coupled to the other side of the main body parallelly to the fixed laser to allow a user to randomly vary the irradiation angle by randomly rotating the laser to measure the distance from the other end unit of the object to be measured, and including an angle sensor which automatically senses the irradiation angle; and a control unit calculating the distance between one end unit and the other end unit of the object through a triangulation calculation of the measured distance from the one end unit of the object measured by using the first axial laser, the measured distance from the other end unit of the object by using the second axial laser, and the distance between the first axial laser and the second axial laser.

Description

{Object width measure method using A laser range finder}

The present invention relates to a method for measuring an object width using a laser range finder, and more specifically, a laser range finder capable of measuring not only the distance to an object but also the width of an object, regardless of the measurement angle between the instrument and the object. It relates to a method for measuring the width of an object.

In general, a laser range finder is a device that shoots a laser at a target to measure a distance, measures the time at which the launched laser is reflected by the target, and then converts the time to a distance, so that the measuring person can visually judge the distance. , It has been developed for military purposes to accurately measure the distance to the target to increase the accuracy rate, and is now useful in construction sites and industrial sites where large-scale facilities are built.

Such a laser distance measuring device includes a device for generating a laser and an optical detector that detects the laser that has been reflected back from the target, and measures the time at which the emitted laser is reflected back to the target to calculate the distance to the target. .

The laser distance meter according to the prior art will be described with reference to FIG. 1 as follows.

FIG. 1 is a view showing a distance measured by a laser 1 and a laser light receiving sensor 2.

In the measurement method, when measuring the distance d to a desired object, a laser beam is emitted from the laser 1 to detect the reflected light reflected by the object by the laser light receiving sensor 2, and the angle θ at this time It was a method of detecting and measuring the distance to an object by trigonometry.

However, the laser range finder according to the prior art has the following problems.

First, since the laser 1 and the laser light receiving sensor 2 are separated, there is a problem in that convenience is reduced during measurement.

Depending on the situation, two people may be required for the measurement work, and thus, there is a problem in that the efficiency of operation of the measurement personnel is reduced.

Second, since only the distance measurement between the measurement object and the measurement object can be performed, there is a problem in that the efficiency of using the measurement device is reduced.

That is, there was a problem that was not efficient in terms of various functionalities of the measuring instrument.

Accordingly, the Republic of Korea Patent Publication No. Republic of Korea Publication No. 10-2014-0045631 proposed an invention for solving the above problem, but the invention could not solve all problems.

Therefore, a technique for solving the above-described problems is needed.

Meanwhile, the above-described background technology is technical information acquired by the inventor for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a known technology disclosed to the general public before filing the present invention. .

The present invention has been devised to solve the above problems, and an object of the present invention is to configure a pair of lasers capable of sensing distances and angles to one end and the other end of an object to be measured, respectively. It is intended to increase the convenience of measurement work by configuring side by side and to provide a laser range finder that can be measured by only one person.

Another object of the present invention is a measurement angle between a measurement target object and a measuring device by using a specific equation to measure a value obtained by measuring a distance and an angle between one end of the measurement object and the other end of the measurement object through a pair of lasers. It is intended to provide a laser range finder and a method for measuring the width of an object using the laser distance measurer capable of measuring the width of the object to be measured regardless of.

In order to achieve the above object, the present invention constitutes an exterior, and includes a main body including a display unit on which a measurement value is displayed; fixed to one side of the main body, and laser so that an irradiation angle with an object to be measured is a right angle A fixed laser that oscillates to measure the distance from one end of the object to be measured; the other side of the main body is axially coupled to the fixed laser side by side, and the user rotates to randomly vary the irradiation angle while the other object to be measured A second axis laser that measures the distance of and includes an angle sensor that automatically senses the irradiation angle; the measurement distance with one end of the object measured through the first axis laser and the object of the object through the second axis laser. It provides a laser distance measuring device comprising: a control unit for calculating a distance between the other end and the distance between the first and second axes of the object through trigonometric calculation of the distance between the first axis laser and the second axis laser.

The present invention is another example for achieving the above object, in the method of measuring the object width when the irradiation angle between the first axis of the laser distance meter and one end of the object to be measured is a right angle, (a ) Oscillating the first axis laser so that the angle of one end of the object to be measured and the laser beam are at right angles; (b) oscillating the second axis laser to oscillate the other end of the object to be measured; (c) the The distance (y) and the angle (θ) between the second axis laser and the other end of the object to be measured are measured through step (b), and the distance value between one end of the object to be measured measured through the first axis laser is measured. (x) and calculating a part width (s) of the object to be measured from the other end of the object to be measured to a certain position of the object to be measured by the second axis laser at a right angle; (d) previously registered; The step of obtaining the total width (M) of the object to be measured by adding the distance value (a) between the first axis laser and the second axis laser and the part width (s) of the object to be measured calculated in step (c): It provides a method for measuring the object width using a laser range finder configured.

The present invention is another example for achieving the above object, in the method of measuring the object width when the irradiation angle between the first axis of the laser distance meter and one end of the object to be measured is not a right angle, (a) moving the main body toward one end of the object to be measured to oscillate the first axis laser; (b) rotating the second axis laser to oscillate to the other end of the object to be measured; (c) the measured first Using the triangulation method with the distance (A) between the axis laser and one end of the object to be measured and the distance (a) between the previously registered first axis laser and the second axis laser, one end of the second axis laser and the object to be measured Calculating a distance (l) between the parts; (d) a distance (A) between the first axis laser and one end of the measurement object and a distance between the second axis laser and one end of the measurement object to form Calculating a distance (l) between the second axis laser and one end of the object to be measured and an angle (α) formed by the other side of the main body using the opposite angle with respect to the between angle (α); (e) the second axis The distance between the laser and one end of the object to be measured (A), the distance between the second axis laser and the other end of the object to be measured (B), and the distance between the second axis laser and one end of the object to be measured are formed Calculating the total width (M) of the object using a trigonometric method with the angle of incidence (α) and the angle of irradiation of the second axis laser (β) with respect to the angle of incidence: to provide.

According to an embodiment of the present invention, a pair of lasers capable of measuring the distances from one end and the other end of an object to be measured are respectively provided, but by arranging side by side in one body, the body is gripped with only one hand. Since the measurement operation can be performed, there is an effect of increasing the convenience of the measurement operation.

In addition, according to an embodiment of the present invention, it is possible to increase the efficiency of the measurement manpower operation because it is possible to work as a single worker.

In addition, according to an embodiment of the present invention, even in a workplace with high possibility of dust and explosion, measurement is possible without manpower input to the workplace, thereby ensuring stability.

In addition, according to an embodiment of the present invention, since both ends of the object to be measured are judged based on the measurement value of the laser, the possibility of measurement error can be significantly reduced.

In addition, according to an embodiment of the present invention, since at least three measurement locations are measured, the possibility of measurement error can be reduced.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art from the following description. .

1 is a conceptual diagram showing a state in which distance measurement is performed using a laser range finder according to the prior art
2 is a block diagram showing a laser range finder according to a preferred embodiment of the present invention
3 is a perspective view showing a laser range finder according to a preferred embodiment of the present invention
4 is an exemplary view showing a time when the laser returns again when the first axis laser and the second axis laser irradiate the laser while changing the angle.
5 is a flow chart illustrating a process in which the width of an object is measured through a laser distance meter according to a preferred embodiment of the present invention when the irradiation angle between the measuring device and one end of the object is a right angle
6 is a conceptual diagram showing the concept that the width of the object is calculated when the irradiation angle between the measuring device and one end of the object is a right angle
7 is a flowchart illustrating a process in which the width of an object is measured through a laser range finder according to a preferred embodiment of the present invention when the irradiation angle between the measuring device and one end of the object is not a right angle
8 is a conceptual diagram showing the concept that the width of the object is calculated when the irradiation angle between the measuring device and one end of the object is not a right angle

The terms or words used in the specification and claims are not to be construed as being limited to ordinary or lexical meanings. It should be interpreted in a sense and concept consistent with the technical idea of the present invention.

Hereinafter, a laser range finder according to a preferred embodiment of the present invention will be described with reference to FIGS. 2 and 3.

The laser distance meter has a technical feature that enables the distance between the measuring device and the object to be calculated, as well as the width of the object to be measured (relative to the front of the measuring device).

Accordingly, it is possible to easily measure the distance and width of the object to be measured, which is not reachable in the industrial field.

The laser range finder comprises a main body 100, a first axis laser 200, a second axis laser 300, and a control unit 400.

The main body 100 constitutes the appearance of the laser range finder, and protects various parts.

The main body 100 is preferably made of a hexahedron, in particular, in order to increase the reliability of the measurement, the laser irradiation angle of the first axis laser 200, which will be described later, should be configured to be perpendicular to the main body 100.

The main body 100 is provided with a display unit 110 on which measured values are displayed.

The display unit 110 is configured to display measurement values calculated through the control unit 400 to be described later and measurement conditions of the various main bodies 100.

In addition to the main body 100, various operation buttons are installed, and terminals for charging and supplying power may be installed.

Next, the first axis laser 200 measures a distance between one end of the object to be measured (hereinafter referred to as an'object') and the main body 100, and is installed to be rotatable on one side of the main body 100. .

According to FIG. 3, the first axis laser 200 is illustrated as being fixed to one side of the main body 100, but this is only an example and may be installed to be rotatable like the second axis laser 300. have.

Specifically, the first axis laser 200 is installed on one side of the main body, but can be rotated left and right. As the first axis laser 200 rotates, the first axis laser 200 is irradiated with a laser in a direction toward which one end of an object to be measured can be found. The principle of finding one end of the object will be described later.

The first axis laser 200 is the same as a range finder using a known laser, and as described above, the laser irradiation angle oscillated from one side of the main body 100 may be always perpendicular to the main body 100. So that it is installed.

That is, the first axis laser 200 measures the distance between one end of the object to be measured and the main body 100, and the distance provides the length of the side of the triangle when calculating the distance using the triangulation method.

Next, the second axis laser 300 serves to measure the distance between the main body 100 and the other end of the object while varying the irradiation angle of the laser, and is installed on the other side of the main body 100.

At this time, the second axis laser 300 also has the same configuration as a known range finder using a laser, and is installed at a position parallel to the first axis laser 200 in a straight line.

The second axis laser 300 is rotated on the main body 100, and oscillates the laser toward the other end of the object.

Specifically, the second axis laser 300 is installed on the other side of the main body, but can be rotated left and right based on the measurement direction. As the second axis laser 300 rotates, the second axis laser 300 is irradiated with a laser in a direction toward which the other end of the object to be measured can be found. The principle of finding the other end of the object will be described later.

The second axis laser 300 includes an angle sensor 310, and when the second axis laser 300 is rotated to oscillate a laser toward the other end of the object, the distance between the main body 100 and the other end of the object And the rotation angle of the second axis laser 300 by the angle sensor 310 is automatically displayed.

The angle sensor 310 is preferably provided with a rotary encoder.

Then, a dial 311 is installed to rotate the rotary encoder 310, and a part of the dial 311 is exposed to the outside of the main body 100 as shown in FIG.

At this time, the rotation structure of the second axis laser 300 using the dial 311 is not particularly limited, and a known rotation structure may be applied.

Next, the control unit 400 may determine one end and the other end of the object to be measured through the measured values of the first axis laser 200 and the second axis laser 300.

Specifically, the first axis laser 200 and the second axis laser 300 rotates around the driving shaft to irradiate the laser toward the object to be measured, and the time until the irradiated laser is received again A sudden change occurs (hereinafter referred to as an inflection point). The control unit 400 determines that the point at which the laser irradiated by the first axis laser 200 and the second axis laser 300 reaches at the inflection point is one end and the other end of the measured object.

In addition, the control unit 400, the distance between the first end of the object measured through the first axis laser 200 and the second axis laser 300, the distance between the other end of the object, and a predetermined first axis laser ( 200) and the second axis laser 300 serves to automatically calculate the object width in front of the main body 100 by using a triangular method.

At this time, the control unit 400 is for the case where the object is arranged in a straight line in front of the main body 100, for example, in the case of a measurement environment in which the oscillated laser of the first axis laser 200 can be perpendicular to one end of the object There is a technical feature capable of calculating the object width and calculating the object width separately for a measurement environment in which the oscillated laser of the first axis laser 200 cannot be perpendicular to one end of the object.

Accordingly, the laser distance meter according to the present invention can increase the reliability of the measurement without restriction on the object position.

In this case, the control unit 400 has an angle between the oscillated laser of the first axis laser 200 and one end of the object, and an angle between the oscillated laser of the first axis laser 200 and one end of the object. In the case of a non-right angle, each equation is input so that the object width can be calculated, and the controller 400 loads the equation suitable for the measurement environment to calculate the object width.

First, Equation 1 for calculating the object width when the laser oscillated from the first axis laser 200 forms a right angle with one end of the object will be described.

<Equation 1>

M = distance between one end and the other end of the object (object width)

a = distance between the 1st axis laser and the 2nd axis laser (pre-entered data)

x = distance between the first axis laser and one end of the object

x'= distance between the 2nd axis laser and the object

x = x'

θ = laser irradiation angle of the 2nd axis laser

y = distance between the second axis laser and the other end of the object,

This is an equation using trigonometry.

That is, as can be seen through Figure 5, the first axis laser 200 and the second axis laser 300 are already installed in the main body, between the first axis laser 200 and the second axis laser 300 The distance (a) is a state input to the control unit 400.

And, the distance (x) between the first axis laser 200 and one end of the object can be replaced by a distance value (x') between the second axis laser 300 and the object so that it can be used in trigonometry. .

Accordingly, the distance (x') between the second axis laser 300 and the object, and the distance between the second axis laser 300 and the other end (y) of the object and the angle measurement (θ), part of the width of the object (s) can be calculated using trigonometry.

Thereafter, since the distance a between the first axis laser 200 and the second axis laser 300 is a value already input to the control unit, the width of the object can be automatically calculated using Equation (1).

On the other hand, in calculating the object width when the angle between the laser oscillated from the first axis laser 200 and one end of the object is not a right angle, an error may occur in the calculated value when Equation 1 above is applied. do.

This is because the distance value a between the first axis laser 200 and the second axis laser 300 does not correspond to the remaining width k of the object except for some width s of the object.

That is, as the laser irradiation angle of the measuring instrument with respect to the object deviates from the right angle based on one end of the object, the distance a between the first axis laser 200 and the second axis laser 300 and the remaining width of the object (s) Whatever the error can be worse.

To this end, Equation 2 for measurement is input to the control unit 400, and Equation 2 will be described with reference to FIG. 7.

<Equation 2>

M = distance between one end of the object and the other end (width of the object)

을 통해 산출되고, l = distance between the second axis laser and one end of the object (the virtual distance calculated automatically, l =

Is calculated through,

a = distance between 1st axis laser and 2nd axis laser)

B = distance between the 2nd axis laser and the other end of the object

The angle between the angle between α = l and A (the distance between one end of the object and the first axis laser)

β = laser irradiation angle of the second axis laser,

As can be seen through FIG. 7, the distance (A) between one end of the object and the first axis laser 200 and the distance value (a) between the first axis laser 200 and the second axis laser 300 are It can be easily measured, and the virtual distance, that is, the distance (l) between the second axis laser 300 and one end of the object can also be calculated by Pythagorean theorem.

At this time, through the Pythagorean theorem, the distance (A) between the distance (A) between the first axis laser 200 and one end of the object can also be calculated, and the angle (α) for this Can also be calculated automatically.

Next, tan α = a/A by trigonometric ratio, α = tan ⁻¹ (a/A) can be obtained, and then Equation 2 can be derived through the second cos law.

Accordingly, even if the angle between the laser oscillated from the first axis laser 200 of the measuring instrument and one end of the object is not a right angle, the width of the object is automatically calculated through the calculation of the control unit 400 input with Equation (2). It can be calculated.

Meanwhile, when the angle between the laser oscillated from the first axis laser 200 and one end of the object is not a right angle, other equations other than Equation 2 above may be applied.

This will be described using Equation (3).

<Equation 3>

M = distance between one end of the object and the other end (width of the object)

A = distance between the first axis laser of the object and one end of the object

a = distance between 1st axis laser and 2nd axis laser

B = distance between the 2nd axis laser and the other end of the object

β = laser irradiation angle of the second axis laser,

This is the application of Equation 2,

임을 알 수 있다.As described above, in <Equation 2>, l is through FIG.

You can see that

And, by the trigonometric ratio, tanα = a/A, and α = tan ^-1 (a/A),

및 tan^-1 (a/A)을 대입함으로써 상기한 수학식3이 도출될 수 있는 것이다.Recall instead of l and α

And by substituting tan ^-1 (a/A), the above equation (3) can be derived.

As can be seen from this, it is possible to measure the width (M) of the object when the angle between the laser oscillated from the first axis laser 200 and one end of the object is not a right angle. Equation 3> can be applied.

Hereinafter, a process of measuring the width of the object when the angle between the laser oscillated from the first axis laser 200 and one end of the object is a right angle will be described in detail with reference to the attached FIGS. 5 and 6.

The mode of the operation button is set to a case where the angle between the laser oscillated from the first axis laser 200 and one end of the object is a right angle.

Next, the first axis laser 200 of the main body 100 is aligned with one end of the object, and the laser is oscillated. (S100)

At this time, the distance (x) between one end of the object and the first axis laser 200 is measured immediately and then input to the control unit.

Next, the second axis laser 300 is oscillated toward the other end of the object. (S200)

At this time, the measurer rotates the dial 311 to match the irradiation angle of the second axis laser 300 to the other end of the object.

At this time, the irradiation angle θ of the second axis laser 300 is automatically sensed due to the configuration of the angle sensor, that is, the rotary encoder.

Then, by oscillating the second axis laser 300 at the other end of the object, the distance y between the second axis laser and the other end of the object is measured immediately and then input to the control unit 400.

At this time, since the straight line distance x'between the second axis laser 300 and the object is the same as the distance x between one end of the object and the first axis laser 200, as shown in FIG. Partial width (S) of the object is calculated through Equation (S300).

Next, the controller 400 finalizes the object through an operation of adding a distance a between the first axis laser 200 and the second axis laser, which is previously input, to a part width S of the calculated object. The width M is calculated, and the calculated value is displayed through the display 110. (S400)

Hereinafter, with reference to FIGS. 7 and 8, the process of measuring the width of the object when the angle between the laser oscillated from the first axis laser 200 and one end of the object is not a right angle will be described in detail.

The first axis laser 200 of the main body 100 is fitted to one end of the object, and the laser is oscillated. (S1000)

At this time, the distance A between the one end of the object and the first axis laser 200 is measured immediately, and then input to the control unit.

Next, the second axis laser 300 is oscillated toward the other end of the object. (S2000)

At this time, the measurer rotates the dial 311 to match the irradiation angle of the second axis laser 300 to the other end of the object.

At this time, the irradiation angle β of the second axis laser is automatically sensed due to the configuration of the angle sensor, that is, the rotary encoder.

Accordingly, the distance B and the irradiation angle β between the second axis laser 300 and the other end of the object are measured immediately and then input to the control unit 400.

Next, the control unit 400 uses the distance (A) between one end of the object and the first axis laser, and the predetermined distance (a) between the first axis laser 200 and the second axis laser 300. Through the Pythagorean theorem, a virtual line, that is, the distance l between the second axis laser 300 and one end of the object is calculated. (S3000)

At this time, as shown in Figure 7, the distance between the distance (A) between the one end of the object and the first axis laser, and the distance (l) between the second axis laser 300 and one end of the object (at) α) may be calculated through a triangular method (the distance of the Cheetah Goras), whereby the distance (l) between the second axis laser 300 and one end of the object and the angle formed by the second axis laser 300 (α) can also be calculated automatically (S4000).

As described above, the controller 400 receiving the calculated value calculates the final value of the width M of the object using Equation 2 or Equation 3, and the calculated final value is displayed through the display 110. .

Thereby, the measurement of the width of the object using the laser distance meter is completed.

100: main body 110: display unit
120: Insertion groove 200: 1st axis laser
300: 2nd axis laser 310: Angle sensor
311: dial 400: control

Claims (4)

In the object width measurement method when the irradiation angle between the first axis of the laser distance meter and one end of the object to be measured is a right angle,
(a) oscillating the first axis laser so that the angle of one end of the measurement object and the laser beam is a right angle;
(b) rotating the second axis laser to oscillate the other end of the measurement object;
(c) measuring the distance (y) and angle (θ) between the second axis laser and the other end of the measurement object through the step (b), and one end of the measurement object measured through the first axis laser Calculating a partial width (s) of the object to be measured from the other end of the object to be measured to a certain position of the object to which the second axis laser corresponds at a right angle by using the distance value (x) and the trigonometric method;
(d) The total width (M) of the object to be measured is added by adding the distance value (a) between the previously registered first and second axis lasers (a) and some width (s) of the object to be measured calculated in step (c) above. Step of obtaining ): A method of measuring an object width using a laser range finder configured to include.
In the object width measurement method when the irradiation angle between the first axis of the laser distance meter and one end of the object to be measured is not a right angle,
(a) oscillating the first axis laser by moving the main body toward one end of the object to be measured;
(b) rotating the second axis laser to oscillate the other end of the measurement object;
(c) Using the triangulation method with the distance between the measured first axis laser and one end of the object to be measured (A), and the distance between the registered first axis laser and the second axis laser (a), the second axis Calculating a distance (l) between the laser and one end of the object to be measured;
(d) Using the angle between the distance (A) between the first axis laser and one end of the object to be measured and the distance between the second axis laser and one end of the object to be measured (α), Calculating a distance (l) between the biaxial laser and one end of the object to be measured and an angle (α) formed by the other side of the main body;
(e) Distance between the second axis laser and one end of the object to be measured (A), Distance between the second axis laser and the other end of the object to be measured (B), One end of the second axis laser and the object to be measured Comprising the step of calculating the total width (M) of the object using a triangulation method with the angle (α), the irradiation angle (β) of the second axis laser with respect to the angle between the distance formed by: Method of measuring object width used.
According to claim 1,
Step (a) is,
And detecting the one end and the other end of the object to be measured based on the time at which the laser irradiated by the first axis laser and the second axis laser is received.
According to claim 2,
Step (a) is,
And detecting the one end and the other end of the object to be measured based on the time at which the laser irradiated by the first axis laser and the second axis laser is received.

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