Automatic light-changing welding 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 the effect of simple and reliable structure, high testing accuracy, and easy operation

Inactive Publication Date: 2009-10-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of automatic darkening welding goggles response characteristic test system in order to overcome the shortcoming of existing test system

Method used

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  • Automatic light-changing welding goggles response characteristics test system
  • Automatic light-changing welding goggles response characteristics test system
  • Automatic light-changing welding goggles response characteristics test system

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Experimental program
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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 a system for testing the response characteristics of automatic darkening welding goggles. It is composed of white light source, collimating lens, sample, sample stage, photomultiplier tube, trigger light source, acquisition control circuit, computer, stepping motor, stepping motor driver; white light source and collimating lens are arranged on the same optical axis , sample stage, photomultiplier tube, the photomultiplier tube is connected with the acquisition control circuit and the computer, the trigger light source is connected with the acquisition control circuit and the computer, the sample is placed on the sample stage, the sample stage is provided with a stepping motor, and the stepping motor is connected with the The stepper motor driver and the acquisition control circuit are connected. The invention adopts a mobile sample stage, which can measure the response time of different positions of the dimming welding goggles; adopts a semiconductor light source as a trigger light source, and only needs to quickly modulate the driving voltage of the light source to obtain the pulse light intensity; The barrel spring device presses the laser on the detector of the sample so that the laser will not 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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Patent Type & Authority Patents(China)
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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