RU107352U1 - MEASURING STAND FOR LIGHTING DEVICES - Google Patents

Abstract

 A measuring stand for lighting devices containing fastening and spatial orientation of the controlled lamp, light meter, voltage, current and power measuring instruments, characterized in that electronic devices based on analog-to-digital converters are used as measuring instruments for voltage, current and power, the output of which is connected through a microcontroller to a personal computer, electric motors are installed as a means of spatial orientation, providing gate controlled lamp mounting frames around the horizontal and vertical axes, driven personal computer via a microcontroller, digital additionally installed temperature sensors which are also connected to the computer via a microcontroller.

Description

The solution relates to the field of lighting engineering and can be used to control the properties of lighting devices.

There is equipment for researching an DRL high-pressure arc mercury fluorescent lamp (Baev V.I. Workshop on electric lighting and training. - M.: Agropromizdat, 1991, P.89-92), containing a high-pressure discharge lamp, choke, autotransformer, switch , a rheostat, a wattmeter, a push-button switch, a switch, an ammeter, a voltmeter for measuring voltage on the inductor, a voltmeter for measuring voltage on a lamp at the time of ignition, a voltmeter for measuring voltage on a lamp in operating mode, a voltmeter for measuring eniya voltage on the autotransformer, light meter sensor illuminometer.

A disadvantage of the known equipment is the inability to study the characteristics of the fixtures and, as a consequence, low functionality.

A device is known for measuring and calibrating radiation patterns of light-emitting devices (RF Patent No. 2361183 G01J 1 | 18 publ. 2009/07/10), comprising a bright meter, a mechanical rotary device that allows you to rotate the test light source (lamp) to measure the dependence of light intensity on direction in space. However, its capabilities are limited.

As a prototype adopted measuring stand [RF Patent 78629 A01K 29/00 and A01K 1/02 publ. (10.12.2008)], containing fastening and spatial orientation means of the controlled light source, light meter, voltage, current and power measuring instruments. This device can be used as laboratory equipment in the educational process and experimental laboratories for taking electrical and lighting characteristics of gas-discharge lamps and luminaires. The current strength is measured with an ammeter, voltage with a voltmeter, power with a wattmeter, and light with a luxmeter. Control of parameters is carried out according to the mnemonic scheme applied to the front panel. The mount is a tripod with a horizontal bar. Position adjustment is carried out manually in one plane. Characteristics of a discharge lamp are taken with an oscilloscope.

The disadvantage of this stand is the inability to simultaneously measure the mutual influence of the controlled parameters on each other, the inability to automate the measurement process and, as a result, low accuracy and performance.

These shortcomings are eliminated in the proposed stand.

The task of creating an automatic measuring system is being solved.

The technical result is the expansion of the functionality of the stand due to the integrated use of measuring devices taking into account the influence of parameters, for example:

- power to temperature,

- power to brightness,

- temperature brightness, etc.

This technical result is achieved by the fact that in the measuring stand for lighting devices containing mounting means and spatial orientation of the controlled lamp, a light meter, means for measuring voltage, current and power, analog devices based on analog are used as means for measuring voltage, current and power -digital converters, the output of which is connected through a microcontroller to a personal computer, electrical means of spatial orientation are installed motors that provide rotation of the mounting frame of the controlled light source around the vertical and horizontal axes, controlled by a personal computer through a microcontroller, additionally installed digital temperature sensors, which are also connected to a personal computer through a microcontroller.

In the proposed stand, the use of automation means provides control of all measuring and actuating devices, complex measurements under the control of a single program.

Below are: a general view of the proposed stand (figure 1) and its block diagram (figure 2).

The stand containing the mounting fixture of the lamp 1 in the form of frames 2 for its spatial orientation by electric motors 3 and 4, providing rotation of the frames 2 with a controlled lamp 1 around the horizontal and vertical axes. A light meter 5 is installed in the radiation field of the luminaire 1. Digital temperature sensors are installed in the luminaire 1 body. This is a system of temperature sensors for measuring temperature at various points of the luminaire and the environment. The electric circuit of the luminaire 1 includes a meter of electrical parameters 7: voltage U, current I, which includes electronic devices based on analog-to-digital converters, the output of which is connected through a microcontroller 8 to a personal computer 9 (PC) that implements a common program for measuring various parameters in their relationship.

The device operates as follows. The test program launched on PC 9 transmits the control commands to the microcontroller 8. In accordance with them, the latter sets the azimuth and polar rotary devices to the required position and reads the readings of the light meter 5, the temperature at various points of the lamp housing 1, as well as the ambient temperature using temperature sensor systems 6. At the same time, the electrical parameters of the load are measured (instantaneous values of voltage U and current I. The latter are used to calculate the microcontrol Weller 8 instantaneous load power values P and rms U _rms voltage, current I _rms. and power P _wells. brightness values, temperatures and electrical parameters are transmitted by the microcontroller 8 a host computer 9 through the communication channel, enabling the control program to calculate the luminance characteristics of the lamp ( for example, light output, luminous flux utilization coefficient, KCC light intensity curves) as well as the interdependence of various parameters from each other.

A virtual measurement control panel is displayed on the screen, allowing you to set measurement parameters and record results, and intermediate results are also displayed: the values of electrical, brightness and temperature parameters in digital and graphic form.

The proposed stand provides the ability to measure the parameters of the lamp:

- temperatures at arbitrary points of the luminaire during its operation;

- electrical characteristics of the power circuit of the lamp:

- forms of input voltage, current and instantaneous power;

- nonlinear distortion and electromagnetic compatibility parameters;

- power factor;

- coefficient of performance.

Such a combination of functions allows you to use this tool to automatically study the characteristics of the fixtures for arbitrary combinations of power parameters, the environment and operating modes.

Claims (1)

A measuring stand for lighting devices containing fastening and spatial orientation of the controlled lamp, light meter, voltage, current and power measuring instruments, characterized in that electronic devices based on analog-to-digital converters are used as measuring instruments for voltage, current and power, the output of which is connected through a microcontroller to a personal computer, electric motors are installed as a means of spatial orientation, providing gate controlled lamp mounting frames around the horizontal and vertical axes, driven personal computer via a microcontroller, digital additionally installed temperature sensors which are also connected to the computer via a microcontroller.