Automatic changing photocoagulation goggles response characteristics test system

A response characteristic, automatic dimming technology, applied in the direction of optical instrument testing, testing optical performance, testing of machine/structural components, etc., to achieve high testing accuracy, simple and reliable structure, and easy operation

Inactive Publication Date: 2008-03-12
ZHEJIANG UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of automatic darkening welding gogg

Method used

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  • Automatic changing photocoagulation goggles response characteristics test system
  • Automatic changing photocoagulation goggles response characteristics test system

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Embodiment Construction

[0017] The basic principle of the present invention is: the white light source is collimated into quasi-parallel light through the collimating lens, passes through the sample to be tested, and is incident on the photomultiplier tube; the semiconductor light source is used as the trigger light source to irradiate the photodetector of the eye protector; The single-chip microcomputer controls the semiconductor laser to emit rectangular light pulses, and at the same time triggers the acquisition circuit to collect the photoelectric signal of the photomultiplier tube at high speed; after the measurement is completed, the collected data is sent to the computer for data processing and calculation. The trigger light source in the system is fixed by a magnetic adsorption method that can be positioned arbitrarily. The acquisition of the signal adopts the method of dual amplifier and curve fitting, which can reach 10 5 linear measurement range. As a special equipment for measuring the r...

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Abstract

The invention discloses an automatic light-changing welding goggles response characteristic testing system which comprises a white light source, a collimating lens, a sample, a sample stage, a photomultiplier, a triggering light source, an acquisition and control circuit, a computer, a stepping motor and a stepping motor driver; the same optical axis is provided with the white light source, the collimating lens, the sample stage, and the photomultiplier, the photomultiplier is connected with the acquisition and control circuit and the computer, the triggering light source is connected with the acquisition and control circuit and the computer, the sample is placed on the sample stage, the sample stage is provided with the stepping motor, and the stepping motor is connected with the stepping motor driver and the acquisition and control circuit. The invention adopts the movable sample stage, and can measure the response time of different positions of the light-changing welding goggles; the invention adopts the semiconductor light source as the triggering light source, and therefore only the quick modulation is implemented for the driving voltage of the light source, the pulse light intensity can be gained; the invention adopts a sleeve type spring device to press a laser on a detector of the sample in order to result in that the laser doesn't leak light.

Description

technical field [0001] The invention relates to a system for testing the response characteristics of automatic darkening welding goggles. Background technique [0002] Auto-darkening welding goggles is a new type of welding goggles made of liquid crystal panels that can quickly switch between light and dark states. The light-changing welding goggles include a liquid crystal panel, a driving circuit, and a photodetector. Before welding, the LCD panel is in a transparent state. During welding, the strong light emitted by the electric welding triggers the photodetector, which makes the photodetector output a high level, and controls the driving circuit to close the liquid crystal panel, so that the liquid crystal panel is in a state of low transmittance. After the welding stops, the LCD panel will automatically return to the transparent state. Therefore, with darkening welding goggles, the welder can always clearly observe the welding parts before and after welding without r...

Claims

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Application Information

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IPC IPC(8): G01M11/00G01M11/02
Inventor 薛晖李海峰黄文标徐良刘旭
Owner ZHEJIANG UNIV
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