JPH04126392A - Illuminating system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The present invention relates to a lighting device with a "natural" fluctuation characteristic corresponding to daylight. After setting the dimming level (after setting the dimming level)
The problem that the invention aims to solve is that the amount of light emitted from a light source does not vary over time. However, natural light changes due to the effects of cloud movement, atmospheric fluctuations, etc. , artificial lighting, which has a constant amount of light even though it fluctuates over time, gives the impression that it is "unnatural" and makes people feel uneasy. This invention can be cited as one of the factors that determines the "comfort" in spaces such as rest facilities and eating facilities. 101Hz by placing the luminous sensitivity corrected light receiving part outdoors
The signal sampled at a frequency between and 10-2 Hz is output to the calculation unit, and the calculation unit adjusts the light based on the functional relationship between the input signal to the dimming unit and the amount of light emitted from the light source unit, which has been determined in advance. The light control section is a lighting device that changes the amount of light emitted from the light source section based on the control signal.In addition to the above-mentioned components, the dimming section also includes a data writing device and a data reading device. The light receiving section and the data writing device are separated from other components, and a storage medium is prepared in advance in which the data writing device stores the signal from the light receiving section placed outdoors, and the storage medium is used as the data writing device. A lighting device that inputs the signal reproduced by the readout device to the calculation unit.
Equipped with a signal generator that outputs a signal at a frequency between 2Hz and the lowest frequency included in the signal is between 10-6Hz and 10-
2Hz range, maximum frequency is 10-2Hz to 101H
z range, and the magnitude of the amplitude modulation of the frequency component of the signal is proportional to the reciprocal of the frequency.

Function: With the above-described configuration, it is possible to emit illumination light having "natural" fluctuation characteristics corresponding to daylight from the light source. Common elements in the two embodiments will be described with the same reference numerals, but a block diagram of a lighting device according to the first embodiment of the present invention is shown in Fig. 1. In Fig. 1, 1 is a light receiver, and 2 is a light receiver. Calculation unit 3 is a light control unit 4 is a light source unit, and the light receiving unit l has visibility correction in advance, even if placed outdoors.
The light receiving section 1 outputs a signal corresponding to the amount of light on the light receiving surface at a certain sampling frequency to the calculation section 2. Regarding this sampling frequency, due to the visual characteristics of humans, the frequency of 101 Hz or higher is 1. ”
Although it is generally known that it is unpleasant because it induces flickering, etc., it is also known that fluctuations with a period of 10-2 Hz or more (because there are too few changes, it is difficult to obtain a ``natural'' feeling). Accordingly, the sampling frequency should be between 101Hz and 10-"H2. This sampling frequency does not necessarily have to be constant at all times and may vary within the frequency range depending on the outdoor weather. For example, if the temporal fluctuations in light are small, such as in a cloudy sky, it is possible to capture the fluctuations with a relatively low sampling frequency, and if the temporal fluctuations in light are large, such as in a clear sky where clouds are moving rapidly. requires a high sampling frequency, and the control signal obtained by calculation based on the signal from the light receiving section 1 is outputted to the light control section 3 in the modulation section 2, and the light control section 3 adjusts the light source according to the control signal. The amount of light emitted from the light source section 4 is controlled based on the functional relationship between the amount of light emitted from the light source section 4 and the control signal from the arithmetic section 3 as shown in FIG. (The calculation unit 2 calculates the value B of the control signal such that the amount of light emitted from the light source unit 4 A75 < the magnitude of the signal from the light receiving unit 1. By configuring this to Although it is possible to obtain illumination light that faithfully reproduces temporal fluctuations due to the effects of rocking, it eliminates the impression that it is "unnatural" compared to conventional artificial illumination light, which has a constant amount of light. The "comfort" of the illuminated visual environment is high.The present invention can be used not only in rest facilities and eating facilities in general buildings, but also in buildings deep underground or in the deep sea, where the weather on the ground is unknown. However, it is highly practical as a lighting device in a closed space where one has to rely on artificial lighting. There are weather conditions such as typhoons and thunderstorms that are not necessarily comfortable for some people.Other than data on these weather conditions, it would be even better for people in the room if it were possible to constantly provide lighting that is linked to fluctuations in natural light in their preferred weather conditions. Comfort is increased.

A block diagram of a second embodiment of the present invention is shown in FIG. In FIG. 3, 5 is a data writing device, 6 is a storage medium, and 7 is a data reading device, which are different from the first embodiment. 1 and the data writing device 5, the data reading device 7, the calculation section 2, the light control section 3, and the light source section 4 are arranged separately. To explain this, first, a storage medium 6 is created in advance in which a signal from a light receiving unit 1 placed outdoors is stored by a data writing device 5.The storage medium 6 is moved to a location where a data reading device 7 is located. Reading device 7
By configuring as described above, the signal reproduced by
It is possible to obtain illumination light that changes in response to the amount of light on the light-receiving surface and faithfully reproduces the temporal fluctuations in natural light. By switching the data according to the preferences of the user of the device, it is possible to create a lighting environment that is more "comfortable" for the people in the room. rest facilities,
Practicality is high, not only in dining facilities, but also as a lighting device in closed spaces where the weather on the ground is unknown and one has to rely on artificial lighting, such as inside buildings deep underground or in the deep sea. % It goes without saying that it can also be used for entertainment purposes by reproducing the weather of Memorial Day for the people in the room, or by artificially creating weather conditions such as typhoons and thunderstorms. (L) Even if you create data that actually captures outdoor light, the number of In the second embodiment, there is a problem that it takes time to replace the storage medium 6. Therefore, if there is a device that simulates natural light fluctuations near the light source section 4, it would be possible to create a lighting system that is small and easy to handle. The block diagram of the third embodiment according to the present invention is shown in FIG. 4. In FIG. 4, 8 is a signal generating section. In place of the light receiving section L, the signal generating section 8 is provided near the light source section 4.The signal generating section 8 generates a signal simulating fluctuations in natural light at a frequency between 101Hz and 10-'Hz. The operating principle of the signal generating section 8 will be described below.

There are factors that cause fluctuations in natural light (including the alternation of day and night, the effects of cloud movement and atmospheric fluctuations, etc.), and even though these factors are complicatedly intertwined, due to the complex factors involved in such natural phenomena, Although it seems that there is no regularity with respect to the time axis, some regularity may be found by frequency analysis.Inventor CmuMeasuring fluctuations in outdoor light in various weather conditions Shiku
An example thereof is shown in FIG. In Figure 5, the horizontal axis is the elapsed time from the start of measurement, and the vertical axis is the relative value of the output from the receiver installed outdoors. Figure 5 is for a clear sky with clouds, and the envelope Fig. 6 shows the results of frequency analysis of the data in Fig. 5, although it is thought that this indicates changes in the amount of light without the influence of clouds. In Figure 6,
The horizontal axis is the logarithm of the frequency, and the vertical axis is the logarithm of the amplitude modulation depth.
The results of calculations based on the discrete fast Fourier transform method for the data shown in FIG. 5 are shown as dots. The solid line is an auxiliary line and indicates that the degree of amplitude modulation of the frequency component is proportional to the reciprocal of the frequency (1/f characteristic). Figure 6 shows that the data points are close to the auxiliary line except in the low frequency range, or that the data points have approximately 1/f characteristics. It was found that the frequency characteristics of fluctuations in natural light have the following characteristics. (1) The frequency band is mainly from 10-'Hz to 101H.
2 (2) The amplitude modulation degree of the frequency component is proportional to the reciprocal of the frequency (1/f characteristic) The above is a convergence. The signal 1 (t) output from the signal generator 8 at any time t is as follows. It would be ok to use a function like L A'', A, are constants, and φn is a phase, but the values in φ are determined by random numbers. The values of Ao, Ao are ■ (
For example, if you are trying to generate a signal corresponding to a clear sky with no clouds, you can set A to a large value and Ao to a small value. If you are trying to generate a corresponding signal, set both A, , A'' to a large value (-Also, if you are trying to generate a signal that corresponds to a cloudy sky, set A, , A'').
, A' should be set to small values (the range of the frequency f11 also varies depending on the weather condition you are trying to simulate). If you are trying to generate a signal corresponding to a cloudy sky, please stop the calculation at a low frequency band.If you limit the range based on the measurement data of outdoor light, the lowest frequency is 10. -@Hz to 10-2 Hz dryness By setting the maximum frequency in the range of 10-2 Hz to 103 Hz, it is possible to create a signal that faithfully simulates the fluctuations of outdoor light under any weather conditions.
An example of the output signal from the signal generator 8 created in this way is shown in Figure N7. In Figure 7, the horizontal axis is time scale.
The vertical axis is the relative value of the signal intensity.The artificially created signal corresponding to the fluctuation of outdoor light shown in Figure 7 is similar to the measured data of the fluctuation of outdoor light shown in Figure 5. Although it is appropriate to simulate outdoor light using the above method, the present invention is applicable not only to rest facilities in general buildings and eating and drinking facilities, but also to weather conditions on the ground such as inside buildings deep underground or in the deep sea. This lighting system is small and easy to handle, and its practicality is high.The light source section of the invention is compatible with daylight. Being able to emit illumination light with natural fluctuation characteristics increases comfort in illuminated spaces.

[Brief explanation of the drawing]

FIG. 1 shows the block configuration of the illumination device according to the first embodiment of the present invention. Second
Figure 4 shows the block configuration of the third embodiment of the present invention. Figure 5 is a characteristic diagram for measuring fluctuations in outdoor light. Figure 6 is a frequency analysis of the data shown in Figure 5. medicine
FIG. 7 is a characteristic diagram of the output signal from the signal generator. 1. Light receiving pulse 2. Computing suit 3. Dimmer section 4. Light source section 5. Data writing device fL 6. Storage medium 7. Data reading device [8. Signal generation device name of
Patent attorney Akira Okaji and 2 other people ] 10XIO'

Claims (3)

[Claims] (1) Consisting of a light receiving section, a calculation section, a light control section, and a light source section,
A light receiving unit that has been corrected for visibility is placed outdoors, and a signal sampled at a frequency between 10^1Hz and 10^-2Hz is output to the calculation unit, and the calculation unit outputs the input signal to the dimming unit determined in advance. and the amount of light emitted from the light source section, the control signal to the light control section is calculated, and the light control section changes the amount of light emitted from the light source section based on the control signal. lighting equipment. (2) It is equipped with a data writing device and a data reading device, and the light receiving section, the data writing device, and other components are separated, and the signal from the light receiving section placed outdoors is transmitted by the data writing device. 2. The illumination device according to claim 1, wherein a storage medium containing the stored data is prepared in advance, and a signal reproduced from the storage medium by a data reading device is input to the arithmetic unit. (3) From 10^1Hz to 10^-^2 instead of a receiver
A signal generator is provided that outputs a signal at a frequency between Hz,
The lowest frequency included in the signal is from 10^-^5Hz to 10
^-^3Hz range, the highest frequency is in the range of 10^-^2Hz to 10^3Hz, and the magnitude of the amplitude modulation degree of the frequency component of the signal is proportional to the reciprocal of the frequency. 1. The lighting device according to 1.