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System for measuring responsive time of automatically light-changing goggles

A response time and automatic dimming technology, which is applied in the direction of measuring devices, optical instrument testing, and optical performance testing, can solve problems such as rough detection of automatic dimming goggles, discounts on product grades and quality, and impact on the interests of manufacturers, so as to improve Effects of test accuracy and measurement result stability, power consumption reduction, and long service life

Inactive Publication Date: 2008-06-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Usually, because there is no testing system that meets the standards, manufacturers generally use photometers, oscilloscopes and other means to roughly test and calibrate the automatic darkening goggles, which makes the export of products discounted in grade and quality, and affects the manufacturer's reputation. Interests, and the need of the National Labor Insurance Quality Inspection Center for the quality appraisal of automatic dimming goggles, put forward requirements for the automatic dimming goggles response time test system
At present, there is no such special testing equipment that meets the standards in China, and there are no reports of similar products abroad.

Method used

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  • System for measuring responsive time of automatically light-changing goggles
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Embodiment Construction

[0015] Test light source module (1) of the present invention is made of 532nm green laser and light source driver I, wherein light source driver I is made up of light control feedback system and drive circuit as (a) of accompanying drawing 2. Because the stability of the test light source has a great influence on the accuracy and stability of the test results, the test light source must have a light control system. When the power of the light source fluctuates, the light control system provides a negative feedback signal to the light source drive circuit to suppress the change of the light source. To achieve the purpose of stabilizing the light source;

[0016] The trigger module (2) is composed of a 780nm LED and a light source driver II, wherein the light source driver II is composed of an LED drive circuit as shown in Figure 2 (b). When there is a trigger signal, the LED generates modulated infrared light of a certain frequency (≤15kHz). The transmittance of the LCD screen ...

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Abstract

The invention relates to a measuring system of automatic light change goggles response time, in particular to a measuring system of automatic light change goggles response time making use of laser, modulated infrared light, electronic technology and computer technology. The invention consisting of a testing light source, a triggering unit, a signal reception / pretreatment unit, a digital signal treatment / control unit and a power module is characterized in that: the bright and dim status conversion of the liquid crystal screen of the goggles to be measured is controlled by the infrared triggering light source through a computer, the variation of the transparency degree of the goggles is also detected simultaneously, and thus the response time or turn-off and recovery time of the goggles can be worked out. The invention has the advantages of simple structure, portability, energy conservation and consumption reduction, as well as convenient use. The invention which adopts a Europe standard of BS EN379-2003 is applicable to testing the response time of the automatic light change goggles capable of protecting eyes against radiation in electric welding, gas welding and arc light surroundings.

Description

Technical field: [0001] The invention relates to a response time test of safety protective articles, in particular to a response time measurement system for automatic dimming goggles. Background technique: [0002] Since the 1990s, Europe and the United States have promulgated a series of standards (such as BS EN379-2003 in Europe and NSIZ871 in the United States) for automatic darkening goggles that protect human eyes from arc light caused by electric welding and gas welding. A key criterion is the determination of response time (off time and recovery time) and shading number, which is an important parameter to measure the grade and quality of goggles. Auto-darkening goggles response time measurement system (RTMS) is a system for testing and calibrating the response time and shading number of auto-darkening welding goggles. [0003] The key part of the automatic darkening mask is the automatic darkening goggles. In recent years, with the opening and expansion of domestic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00G01M11/02
Inventor 付雷邹正峰陈淑芬孟彦彬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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