RU186925U1 - INDUSTRIAL NEGATOSCOPE - Google Patents

Abstract

The utility model relates to the field of balancing and decoding of radiographs of welds. An industrial negatoscope contains a housing made of hard, opaque material, a screen located inside the housing, a viewing screen illuminator, and a lighting level control on the viewing screen located on the housing. The viewing screen is made in the size of 150 × 60 mm. Cold light emitting diodes with a luminescence temperature of 4500-6000 K and with a light output of 9000-10000 lumens are used as a illuminator on the viewing screen. The lighting level controller is made with the function of continuously adjusting the lighting level. The technical result consists in increasing the probability of detecting defects. 2 ill.

Description

The utility model is designed to view x-ray images and can be used in research and industry and industry, mainly for balancing and decoding radiographs of welds.

The known "Device for viewing images on translucent media (" Negatoscope ")" according to the patent for utility model No. 54303 from 09.25.2003. The proposed device comprises a housing made of hard light-proof material, a viewing screen, a viewing screen illuminator.

The disadvantage of this utility model is that fluorescent lamps are used as the illuminator of the viewing screen.

The NS 85 × 400 negatoscope is known (see http://www.kvazar-ufa.com/art46.html - accessed 08/29/2018), consisting of a durable metal or plastic case, halogen lamps, a viewing screen. The disadvantage of this negatoscope is the use of halogen lamps to illuminate the viewing screen, large (85 × 400 mm) dimensions of the viewing screen, high power consumption (500 W).

The NGS-K LED negatoscope is also known (see http://negatoskopy.ru/negatokopy_ngs - appeal 08/29/2018) consisting of a solid metal or plastic housing, LED lamps, a viewing screen. This negatoscope is taken as a prototype. The disadvantage of the prototype is the screen size (300 × 100 mm).

The technical problem solved by this utility model is to eliminate these drawbacks and increase the likelihood of identifying defects,

This problem is solved as follows.

The main role in ensuring the quality of decoding of radiographs is played by the size of the viewing screen and the light source. For decoding radiographs of welds, the large screen size of industrial negatoscopes is a negative factor, and the contrast of vision is sharply reduced due to lateral exposure.

In the proposed utility model, the optimal size of the viewing window was chosen experimentally - 150 × 60 mm. Cold light emitting diodes of 4500-6000 K with a luminous flux of 9000-10000 lumens and continuously adjustable are used as a quality light source. Since the film has a blue base, these LEDs provide high contrast and a high probability of detecting defects.

In FIG. 1 shows schematically a device of a negatoscope, where:

1 - housing;

2 - viewing window;

3 - LEDs;

4 - handle for smooth adjustment of the luminous flux.

In FIG. 2 shows a photo of a negatoscope in which the proposed utility model is implemented. Work with this sample in a workshop for the production of titanium alloy products showed that when decoding X-ray images of welds, high contrast occurs, a high luminous flux is provided at a power consumption of not more than 100 W, the probability of detecting defects has increased.

The technical result is an increase in the probability of detection of defects.

Claims (1)

An industrial negatoscope comprising a housing made of hard light-proof material, a viewing screen located inside the housing a viewing screen illuminator, a lighting level regulator for the viewing screen located on the housing, characterized in that the viewing screen is 150 × 60 mm in size, cold LEDs are used as a viewing screen illuminator luminescence with a luminescence temperature of 4500-6000 K and with a luminous flux power of 9000-10000 lumens, the lighting level regulator is made with the function of smooth regulation ki lighting level.

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