SU1297097A2 - Method of modelling luminous radiation of sky - Google Patents

Abstract

The invention relates to the field of building lighting and can be used to measure the lighting characteristics of light transmitting structures and fill the apertures. The purpose of the invention is to expand the field of application, increase the accuracy of measurements and accelerate research processes. The device for simulating the light radiation of the sky is made with a hole in the central part of the working area 3, which is used to transmit light fluxes into the camera, which is a straight right prism 6 with lateral mirrors on the inner side, installed below the working platform level its center, a system of photo sensors forming a photometric head 4 installed in the center of the mirror prism with the ability to move along a vertical bar 5, and measuring lines 7, the size ennymi horizontal experimentally with the base of the prism mirror 6 wherein the hole in the center of work platform is blocked with a removable screen uniformly diffuse svotopropuska- Niemi. 4 il. J4) epus.l

Description

The invention relates to construction lighting and is advantageously used in studies of the spatial distribution of the light fluxes of translucent structures, measurements of light transmission coefficients of translucent structures and fillings of the aperture and is an improvement of the known device described in the ed. St. No. 896676.

The aim of the invention is to expand the scope of use, increase measurement accuracy and accelerate research processes.

Figure 1 shows the device, a cross-section; figure 2 is the same, plan view; FIG. 3 is a beam path (for one plane) used in measuring the spatial distribution of the light fluxes of translucent structures; Fig. 4 shows a scheme for measuring the transmittance (for one plane).

The device for simulating the light emission of the sky 1 is tuned to the desired distribution of brightnesses. Investigated design 2 is installed in the opening of the working platform 3. The photometric head 4 is mounted on the rod 5 in the center of the mirror prism 6, with which it moves along the vertical axis of the mirror system. The photosensors of the photometric head 4 are located so that at the points of photometry on their surface the light fluxes from the first display of the structure under study, created by two jMH mirrors located in mutually perpendicular planes, will drop. Two measuring bars 7 are mounted on the floor of the mirror prism 6 in the planes corresponding to the sensors of the photometric head. All photo sensors for protection from stray light are equipped with shielding tubes. The photometric head and measuring bars are connected to the device for automatic interrogation and registration of measured parameters 8.

By placing a photocell in the studied points of space (v. 9-17), it is possible to measure the values of the luminous intensity of the object under study 2 from its image 18, which correspond to

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different angles of radiation. Measurements should be carried out for radiation angles d-5, 15, 25, 35, 45, 55, 65, 75, 85, i.e. at the midpoints of 10 zones.

When measuring, the light fluxes, having passed through the structure under study 2, fall into the mirror prism 7 (figure 1). Here, with the help of the device 8, sensors are interrogated, located on the measuring lines 6, to which light streams fall directly from the structure under study 2, then the photometric head 4 is alternately installed at the photometric points located on the vertical axis (V.13-17, Fig. 3 ). At each point, the corresponding pair of photosensors are surveyed, with light streams from the first display of the object under study falling onto the photocell surface. Measurements in other planes of radiation of the object under study are provided either by rotating the working platform 3 with the studied structure installed on it, or by rotating the photometric head so that it works from another pair of mirrors, and the corresponding permutation of the measuring lines. The photometric head and measuring rulers are easily removable designs.

When measuring the light transmission coefficients, the object under study 2 is also installed on the working platform 3, located under the simulator of natural radiation 1 (Fig. 4). The outlet of the object under study is blocked by a screen 19 with a uniform diffuse light transmission.

The light fluxes, the passage through the structure under study and the screen 19, fall on a system of mirrors of the prism 7, which converts a finite-sized luminous screen into an image of a point source. With the help of a photocell with a shielding nozzle 20 (Fig. 4), measurements of the illuminations from m "gx images, starting with which the object can be considered as a point source, are carried out. When measuring the light transmission coefficients of window units, they are defined as the ratio of the measured illuminance values for the light aperture to the filling area.

with a window block to the readings obtained with measurements for a light opening without filling with a window block. When measuring the light transmittance of the lamps, they are defined as the ratio of the measured values of illuminances obtained during the passage of light fluxes through the lantern under study to the reading m, obtained by the passage of light fluxes through the diaphragm.

The use of the invention expands the field of application of the device according to the author. St. No. 896676, allows to increase the accuracy of the measurements and accelerate the research process.

The positive effect is to save energy, achieved by reducing the time for conducting experiments, as well as to reduce capital and operating costs for natural lighting systems.

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The formula of the invention. A device for modeling the light radiation of the sky by author. St. No. 896676, the difference is that, in order to expand the field of application, to increase the measurement accuracy and accelerate the research process, it is equipped with a camera in the form of a straight right prism with side mirrors that are mirrored on the inner side. with a system of photosensors that form a photometric head installed. in the center of the prism with the ability to move along the vertical axis, and measuring rulers located horizontally at the base of the prism, with the working platform in Made in the central part with a hole for the transmission of light fluxes into the chamber, covered by a removable screen with rabbi-diffuse light transmission.

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Editor N.Gorvat

Compiled by E. Chern vsk

Tehred L. Serdyukova Proofreader A.Zimokosov

Order 785/54 Circulation 434. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

The claims The device for modeling light radiation of the sky according to ed. St. No. 896676, characterized in that, in order to expand the scope, increase the accuracy of measurements and accelerate research processes, it is equipped with a camera installed in the center under the working platform in the form of a straight regular prism with side faces mirrored on the inside with a system of photosensors forming a photometric a head mounted in the center of the prism with the ability to move along the vertical axis, and measuring rulers located horizontally at the base of the prism, and the working platform and in the central part with a hole for passing light flows into the chamber, overlapped with a removable screen ravg-uniformly diffuse light transmission. φί / 2.2 fig. J