KR101595179B1 - Judging Method the luminaire performance through measuring illumination and uniformity factor - Google Patents

Abstract

The present invention relates to a method for determining the performance of a lighting apparatus using illumination and uniformity measurement. The present invention relates to a method for producing a light distribution file, comprising the steps of arranging an illuminometer for measuring illuminance in a 3 × 3 array in a cube-shaped dark room, producing a light distribution file by light distribution of the illuminator measured in the dark room of the step, A step of calculating the average illuminance and uniformity by calculating a simulation by storing data by inserting the light distribution file of the light distribution file and the average illuminance calculated by the illuminance of the illuminator measured using the illuminometer of the step, Comparing the obtained average illuminance with each other, and comparing the uniformity obtained by actually measuring and measuring the illuminator using the illuminometer of the step and the uniformity obtained through the simulation calculation in the step.
The method of the present invention makes it easy for the seller of the lighting equipment to make an accurate judgment about the performance of the lighting, and thus it is possible to select the lighting device having higher quality and reliability to the consumer.

Description

[0001] 1. Field of the Invention [0002] The present invention relates to a method for determining the performance of a lighting apparatus using illumination and uniformity measurement,

The present invention relates to a method of determining the performance of a lighting apparatus using illumination and uniformity measurement. More specifically, the present invention relates to a method of determining the performance of a lighting apparatus using illuminance and uniformity factor, The present invention relates to a method of determining the performance of a lighting apparatus using illumination and uniformity measurement.

In general, lighting devices such as LEDs have a long lifetime, low cost, and low power consumption.

These various advantages have recently attracted attention as an alternative to incandescent lamps or fluorescent lamps used as indoor or outdoor lighting equipment.

Most people who use LEDs recognize that LEDs have a longer lifespan than conventional lighting devices, and the reality is that the reliability of tests that can actually demonstrate the performance of these LED lights is low.

The conventional method for measuring the performance of the LED illumination is to place the LED illumination in the dark room, and to measure the illuminance of the LED illumination and measure the value of the LED illumination.

The device senses the illuminance of the LED light and transmits the data to the server based on the illuminance value. The software of the server can predict the performance of the LED light using the initial data.

However, since the conventional method can obtain the result of the LED lighting performance from the software using only the initial data value, accurate results can not be obtained regarding the performance of the LED lighting used for a long time.

Therefore, there is a problem that the quality or reliability of the LED illumination provided to the consumer can not be accurately determined.

Korean Unexamined Patent Publication No. 2002-0014273 discloses a method of measuring the illuminance of an LED illumination while simultaneously collecting data on an external illuminance value provided by the LED illumination and obtaining an accurate data of an illuminance value of the LED illumination We have presented a method of measuring illumination.

KR1998-0040022 10 KR2012-0014272 10 KR2012-0014273 10

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an LED flat plate type lighting apparatus, an LED edge flat plate type lighting apparatus, a light distribution file of a lighting apparatus for FPL 2, And a method of judging the performance of a lighting device using the uniformity measurement.

In order to achieve the above object, the present invention provides a method of manufacturing a light distribution file, comprising the steps of arranging an illuminometer for illuminance measurement in a 3 × 3 array in a cube-shaped darkroom, A step of storing the data by inserting the light distribution file manufactured in the step and calculating the average roughness and uniformity through calculation of the simulation, and calculating the average roughness and the uniformity obtained by calculating the illuminance of the lighting apparatus using the roughness meter Comparing the average illuminance obtained through the simulation calculation in the step and comparing the uniformity obtained by actually measuring and calculating the illuminator using the illuminometer in the step with the uniformity obtained through the simulation calculation in the step .

The lighting apparatus of the above step is any one selected from an LED flat panel type lighting apparatus, an LED edge flat panel type lighting apparatus, and a FPL 2 lamp type lighting apparatus.

In addition, the illuminometer of the above step is characterized by calculating average roughness and uniformity at the same illuminance simultaneously measured in the respective positions in the dark room.

The illuminance per unit energy for evaluating the illuminance in the above step is lx / W (lx: average illuminance, W: power).

The method for simulating in the above step is characterized by measuring the average illuminance and the uniformity through the illuminance measurement of the illuminator, and checking the data to determine the performance of the illuminator.

Therefore, the performance determining method of the lighting apparatus using the illuminance and uniformity measurement according to the present invention is a method of measuring the actual illuminance of the lighting apparatus, calculating the average illuminance and uniformity, and comparing the results. Therefore, It is possible to directly judge whether or not to do so.

Further, since the seller of the lighting apparatus can make an accurate judgment about the performance of the lighting, it is possible to provide the lighting apparatus having higher quality and reliability to the consumer.

1 is a cross-sectional view showing an arrangement of an illuminance meter and an actual photograph.
2 is a block diagram of a voltage input;
FIG. 3 is a flowchart of a lighting device performance judging method using the illuminance and uniformity measurement according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The same reference numerals are used in the drawings to refer to the same or like parts.

In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

The overall flow of the method of the present invention includes a first step of arranging an illuminometer for measuring illuminance in a 3 × 3 array in a cube-shaped darkroom, and a second step of illuminating a light distribution file A third step of inserting the light distribution file prepared in the second step and the second step and storing the data and calculating the average roughness and uniformity through simulation; The fourth step of comparing the average illuminance calculated by the illuminance of the instrument with the average illuminance obtained through the simulation calculation in the third step and the uniformity obtained by actually measuring the illuminator using the illuminometer of the first step And a fifth step of comparing the homogeneity obtained through the simulation calculation in the third step.

Hereinafter, roughness and uniformity often appearing in the method of the present invention will be briefly described.

Roughness refers to the brightness of the light receiving surface, which is referred to as illumination (E) and is expressed as incident light flux per unit area.

      F: incident light flux, S: incidence area (unit: lux: lm)

      In order to obtain the basic data of the illuminance standard or conformity with the standard or the illuminance of the illuminance to obtain the basic data of the conformity of the design condition and the change of the illuminance over time, This is to compare the illuminance of the facility.

      The uniformity should be decided at the office, school, factory, etc. to determine the degree of brightness of the desk, work surface and surrounding area, and to reduce the difference in brightness so as to reduce the visual fatigue to the operator. The ratio of the lightness of the light to the lightness of the darkness is applied from 2: 1 to 7: 1, but 3: 1 is most appropriate.

In special lighting fields such as museums and art galleries, the uniformity is made worse, and a lot of brightness is added to produce a stereoscopic feeling. In the case of general offices and factories in lighting design, the following method is applied for the uniformity calculation.

The uniformity is a measure of the uniformity of light in the illumination space, and is used as a quantitative evaluation index of the light environment together with the reference illumination.

The general uniformity is expressed as the ratio of the average roughness to the minimum roughness or the ratio of the minimum roughness to the maximum roughness. The uniformity increases as the diffusivity of light increases, which increases as the area of the light source increases. In order to accurately evaluate the uniformity, it is necessary to identify the minimum, maximum, and average values based on points in space.

Hereinafter, the method of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view and an actual photograph showing an arrangement of an illuminance meter, FIG. 2 is a configuration diagram of voltage input, and FIG. 3 is a flowchart of a lighting device performance determination method using illuminance and uniformity measurement according to the present invention.

1, an illuminometer 20 for illuminance measurement is arranged in a 3 × 3 array in a dark room 10 in the form of a cube. (First step)

It is preferable that the dark room 10 has a cubic shape with a length of 3 meters, a height of 3 meters, a height of 10 meters, and an entrance is opened so that a meter (not shown) is arranged in the room and a lighting device (not shown) is installed.

The illuminometer 20 is configured to allow a plurality of illuminance meters 20 formed at a predetermined interval to simultaneously measure illuminance. Accordingly, as shown in the figure, all the nine illuminance meters 20 are arranged in a square shape with the straight lines aligned with each other.

Therefore, the illuminometer 20 of the first stage calculates the average illuminance and the uniformity at the illuminance measured simultaneously at the respective positions in the dark room 10.

The luminous intensity per unit energy for evaluating the illuminance in the first step is lx / W (lx: average roughness (lux), W: watt) .

And the light distribution file is produced by the light distribution of the lighting device measured in the dark room 10 of the first step. (Second step)

The lighting apparatus of the second stage is any one selected from an LED flat plate type lighting apparatus, an LED edge flat type lighting apparatus, and a FPL 2 lamp type lighting apparatus, and measures the light distribution of the lighting apparatus.

The light distribution file produced in the second step is inserted to store data, and the simulation is performed to calculate the average illuminance and uniformity through calculation. (Third step)

In the third step, the average illuminance and the uniformity are calculated by illuminance measurement of the illuminator, and the user checks the data to determine the performance of the illuminator. The details will be described in the following experimental examples.

Next, the average illuminance obtained by calculating the illuminance of the illuminator measured using the illuminometer 20 in the first step and the average illuminance obtained through the simulation calculation in the third step are compared with each other. (Step 4)

Finally, the uniformity obtained by actually measuring and calculating the lighting apparatus using the illuminometer 20 of the first stage is compared with the uniformity obtained through the simulation calculation in the third stage. (Step 5)

       Hereinafter, an experimental example demonstrating the method of the present invention will be described in detail.

       Referring again to FIG. 1, first, an illuminometer 20 for illuminance measurement is arranged in a 3 × 3 array in a dark room 10 in the form of a cube.

       Referring to the illuminometer (20), an illuminometer (20) having nine light-receiving units is used, and an average illuminance is calculated at a plurality of points simultaneously using a 9-point illuminometer, and the uniformity is calculated . The light receiving element of the illuminometer 20 is a silicon photovoltaic cell, and its illuminance measurement range is 0.01 to 29,900 lx.

      As shown in FIG. 1, the arrangement of the measurement points is arranged by dividing the measurement area into areas having the same size, and the measurement height is obtained by arranging the illuminometer 20 on the work surface and measuring the height of the light receiver (not shown) m < / RTI >

In addition, the above arrangement includes both the illuminance measurement position of the IEC 4-point method and the illuminance measurement position in the KS 5-point method, and it is possible to compare each arrangement method by calculating the average illuminance and uniformity of each corresponding illuminance.

(1) Input voltage

      The voltage was adjusted to 220 V using a slicer, and the same voltage was applied to all the luminaire.

As shown in Fig. 2, a gap is formed in the ceiling portion of the dark room 10 so as to allow the electric wire to enter, and the light is connected to the installed luminaire. Then, the voltage regulator was installed outside the dark room and connected to the luminaire by electric wire.

       (2) Measurement

        The selection of lighting fixtures was conducted by selecting 5 types of general household lighting fixtures and 4 types of general lamp type lighting fixtures. Table 1 below shows the type and rated power of the test sample.

[Table 1] Types of measurement samples

        end. LED flat panel type lighting equipment

[Table 2] Measured values of input characteristics of LED flat panel type luminaire

For the calculation of average roughness and uniformity, the formula of KS standard was applied. The remaining luminaire is also the same.

   [Table 3] Average illuminance and uniformity of LED flat panel luminaires

I. LED edge flat type luminaires

[Table 4] Input characteristics of LED edge flat type luminaires Measured value

[Table 5] Average illuminance and uniformity of LED edge flat plate luminaires

       All. Intuitive two-lamp lighting fixtures

[Table 6] Measured values of input characteristics

[Table 7] Average illuminance and uniformity of intuitive type lighting fixtures

la. FPL 4 Lights

[Table 8] Input characteristics of lighting fixtures for FPL 4 lamps

[Table 9] Average illuminance and uniformity of lighting fixtures for FPL 4 lamps

[Table 10] Measured values of the input characteristics of a lighting apparatus for a fluorescent lamp

[Table 11] Average illuminance and uniformity of lighting fixtures for fluorescent lamps

four. Lighting equipment for white hot air balloons

[Table 12] Input characteristics of incandescent lamp luminaires Measured value

[Table 13] Average illuminance and uniformity of luminaires for incandescent lamps

Ah. Lighting fixtures for old-fashioned LED lamps

[Table 14] Measured values of input characteristics of lighting fixtures for LED lamps

[Table 15] Average illuminance and uniformity of lighting fixtures for LED lamps

character. FPL lamp lighting fixtures

[Table 16] Input characteristics of lighting fixtures for FPL lamp Measured values

[Table 17] Average illuminance and uniformity of lighting fixtures for FPL lamps

(3) Simulation calculation

Experimental illumination measurement has many limitations such as time and measurement place. So, if the calculation through simulation is similar to the actual measurement, we expect to see a lot of improvements in how to judge lighting fixtures. Therefore, three kinds of actual lighting equipments were selected to measure the light distribution, and the light distribution file was created and applied to the simulation calculation to compare the actual measured average illumination value with the uniformity. Relux was used as simulation software.

end. Lighting fixture selection

As shown in [Figure 1], the lighting fixtures were selected for LED flat plate type lighting fixtures, LED edge flat type lighting fixtures, and FPL 2 lighting fixtures.

[Figure 1] Simulation lighting equipment

I. Darkroom selection

(a) Spatial setting

      The space of 3m × 3m × 3m was set and the reference surface serving as the illuminometer was set as the bottom surface.

[Figure 2] Setting the darkroom

(b) Reflectance setting

The luminous reflectance measured by Korea Institute of Lighting Research was applied.

[Figure 3] Reflectivity setting

All. Simulation calculation

Simulation calculation was performed by inserting measured light distribution file into the set dark room. [Figure 4] shows the case where the light distribution file is applied to the set dark room.

[Figure 4] Simulation drawing

(a) Simulation results of LED flat panel luminaire

[Figure 5] Simulation results of LED flat panel type lighting fixtures

As a result of the simulation calculation, the illuminance of the work surface appeared as shown in [Figure 5]. In order to match the arrangement of the illuminometer on the work surface, the illuminance was measured at 1.5 m × 1.5 m as shown in the figure, and the illuminance was confirmed at each illuminometer. As a result, the average illuminance was 238 lx and the uniformity was 0.81.

(b) LED edge flat panel lighting device simulation result

[Figure 6] Simulation results of LED edge flat panel type lighting fixtures

Figure 6 shows the simulation results of the LED edge flat panel luminaire. The average illuminance is 272 lx and the homogeneity is 0.84 by calculating the point located at the position of the illuminometer in the above manner.

(c) Simulation result of lighting equipment for FPL 2

[Figure 7] Simulation results of lighting fixtures for FPL 2

In the case of FPL 2 lighting fixtures, the average illumination was 154.8 lx and the uniformity was 0.87.

la. Comparison of actual measurement and simulation results

[Table 17] Comparison between actual measurement and simulation average illumination

[Table 17] shows the comparison between the average roughness calculated by the actual measurement and the average roughness calculated by the simulation. In the case of error, the average value of 6.88% is different. However, this is not the only judging result with just three luminaire, and it should be discussed further.

[Table 18] Comparison between actual measurement and simulation uniformity

The uniformity was also compared with the uniformity obtained from the actual measurement as shown in [Table 18] and the uniformity obtained through the simulation calculation, and the error was shown.

Table 19 Comparison of average roughness uniformity according to measuring method

Table 19 shows the results of comparing average roughness and uniformity according to the roughness measurement method. 9 point method, 5 point method and 4 point method did not show much difference in average illuminance. However, the 9-point method and the 5-point method showed similar results in the case of uniformity, but the 4-point method shows a big difference compared to the other two methods.

[Table 20] Indoor lighting fixture measurement results

Table 20 summarizes the values of illuminance per unit energy from the top in the order of the indoor lighting fixture measurement results. Since the calculation of the illuminance per unit energy is lx (average illuminance) / W (power), the method of deviating the lighting apparatus from the conventional luminous efficiency (lm / W) is eliminated. In the case of FPL 4 lamps, the average illuminance is the highest, but the value of lx / W is small because of the large power used. As a result, it can be seen that a high average illuminance is not a good lighting fixture.

[Table 21] Results of lamp type lighting fixtures

Table 21 also shows the results of lamp type lighting fixtures in the order of lx / W value.

Therefore, unlike conventional lighting fixtures, it is an easy way to measure the illuminance in advance according to the purpose of use, calculate the average illuminance and uniformity, and compare the calculated average illuminance and uniformity. There is an excellent feature that can provide a way to measure performance.

Although the present invention has been fully described by way of example only with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And the scope of the present invention should be understood as the appended claims and their equivalents.

10: dark room 20: illuminometer

Claims (5)

A first step of arranging an illuminometer (20) for illuminance measurement in a 3 × 3 array in a dark room (10) in the form of a cube;
A second step of producing a light distribution file by the light distribution of the lighting device measured in the dark room 10 of the first stage;
A third step of inserting the light distribution file manufactured in the second step to store data and calculating an average illuminance and uniformity through calculation of a simulation;
A fourth step of comparing the average illuminance obtained by calculating the illuminance of the illuminator measured using the illuminometer 20 of the first stage with the average illuminance obtained through the simulation calculation of the third stage;
And a fifth step of comparing the homogeneity obtained by actually measuring and calculating the illuminator using the illuminometer of the first step and the homogeneity obtained by the simulation calculation in the third step, In the mechanism performance determination method,
Wherein the illuminometer (20) of the first stage calculates the average illuminance and the uniformity by simultaneously measuring illuminance at the respective positions in the dark room (10) .
2. The lighting apparatus according to claim 1, wherein the lighting device of the second stage is any one selected from the group consisting of an LED flat plate type lighting device, an LED edge flat type lighting device, and a FPL 2 lighting device. How to judge.
delete The method according to claim 1, wherein the illuminance per unit energy for evaluating illuminance in the first step is lx / W (lx: average illuminance, W: power).
2. The method according to claim 1, wherein the third step simulates the illuminance of the illuminator, and the average illuminance and uniformity of the illuminance are measured to determine the performance of the illuminator by checking the data. A method for judging the performance of a lighting fixture using.

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