RU94036664A - Method of quality control of glow-discharge lamps - Google Patents

Abstract

FIELD: gaseous-discharge light-sources, applicable at early malfunction diagnosis. SUBSTANCE: the method consists in preburning of lamp, periodic measurement of glow potential and dynamic resistance, determination of the magnitudes of variation of glow potential and dynamic resistance. The lamp quality is determined from the following inequalities:where: ΔP,ΔP- allowable variations of working gas pressure in lamp space )Pa); ΔP,ΔP- allowable variations of residual gas pressure (Pa); ΔU,ΔR - magnitude of variations of voltage (V) and dynamic resistance (Ohm) during preburning; K,KKand K- coefficients depending on lamp length. EFFECT: enhanced truth at rejection of lamps.

Claims (1)

The invention relates to gas-discharge light sources and can be used in the early technical diagnosis of failures. The use of the invention provides high reliability when sorting lamps. The method includes training the lamps, periodically measuring the burning voltage and dynamic resistance, determining the magnitude of the change in the burning voltage and the magnitude of the change in dynamic resistance. Lamp quality is judged by inequalities
ΔP ^min ≅ K ₁ ΔU + K ₂ ΔR ≅ ΔP ^max ; ΔP $\genfrac{}{}{0ex}{}{\text{min}}{\text{ost}}$ ≅ K ₃ ΔU + K ₄ ΔR ≅ ΔP $\genfrac{}{}{0ex}{}{\text{max}}{\text{ost}}$ ,
where ΔP ^min , ΔP ^max - permissible changes in the pressure of the working gas in the lamp volume, Pa; ΔP $\genfrac{}{}{0ex}{}{\text{min}}{\text{ost}}$ , ΔP $\genfrac{}{}{0ex}{}{\text{max}}{\text{ost}}$ - permissible changes in the pressure of the residual gas, Pa; ΔU, ΔR - the magnitude of the changes, respectively, voltage, B, and dynamic resistance, Ohm, during training; K ₁ - K ₄ - coefficients depending on the length of the lamp.