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Measuring device and method for measuring temperature during aluminum alloy thermoforming process

A measuring device and thermoforming technology, applied in the direction of measuring device, radiation pyrometry, optical radiation measurement, etc., can solve the problems of difficulty and application of infrared temperature measurement, improve production quality and efficiency, eliminate environmental impact, realize The effect of online high-precision measurement

Pending Publication Date: 2019-06-25
黑龙江省科学院智能制造研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing infrared temperature measurement method is difficult to apply in the aluminum rolling production line, and propose a temperature measuring device and method in the hot forming process of aluminum alloy

Method used

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  • Measuring device and method for measuring temperature during aluminum alloy thermoforming process
  • Measuring device and method for measuring temperature during aluminum alloy thermoforming process
  • Measuring device and method for measuring temperature during aluminum alloy thermoforming process

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specific Embodiment approach 1

[0018] A temperature measuring device during the thermoforming process of an aluminum alloy according to this embodiment, the measuring device includes an objective lens 1, a collimating objective lens 2, a grating 3, a focusing objective lens 4, a pyroelectric sensor 5, a driving circuit and a data acquisition system 6. LCD display 7, host computer 8; collimating objective lens 2 receives information from objective lens 1, grating 3 receives information from collimating objective lens 2, focusing objective lens 4 receives information from grating 3, and pyroelectric sensor 5 receives information from focusing objective lens 4 , the driving circuit and the data acquisition system 6 receive the information of the pyroelectric sensor 5, and the upper computer 8 and the LCD display 7 receive the information of the driving circuit and the data acquisition system 6;

[0019] Moreover, the driving circuit and the data acquisition system 6 include: an amplifier 9, a filter 10, and an ...

specific Embodiment approach 2

[0022] The difference from Embodiment 1 is that the measurement device for the temperature during the hot forming of aluminum alloy in this embodiment further includes a Fresnel optical lens, which is installed on the pyroelectric detection device. On the lens of the detector, the detection sensitivity of the detector is improved to increase the detection distance. The Fresnel lens is made of transparent plastic, and the upper and lower parts of the lens are divided into several equal parts to make a special optical system. The lens, which cooperates with the amplification circuit, can amplify the signal by more than 70 decibels, so that the actions of people within the range of 10 to 20 meters can be measured. The Fresnel lens uses the special optical principle of the lens to produce an alternating "blind area" and "high-sensitivity area" in front of the detector to improve its detection and reception sensitivity. When the object under test passes in front of the lens, the em...

specific Embodiment approach 3

[0023] The difference from Embodiment 2 is that in this embodiment, a temperature measuring device during the hot forming process of aluminum alloy, the pyroelectric sensor 5 is a RE200B dual-element pyroelectric sensor 5, and the sensitive element area of ​​this sensor is 2.0×1.0mm2, substrate thickness 0.5mm, working wavelength 7-14μm, average transmittance>75%, output signal>2.5V (420°k black body 1Hz modulation frequency 0.3-3.0Hz bandwidth 72.5db gain), noise< 200mV(mVp-p) (25℃), balance degree<20%, ​​working voltage 2.2-15V, working current 8.5-24μA(VD=10V, Rs=47kΩ, 25℃), source voltage 0.4-1.1V(VD =10V, Rs=47kΩ, 25°C), operating temperature -20°C- +70°C, storage temperature -35°C- +80°C, field of view 139°×126°. Moreover, the complementary method of dual sensitive elements can effectively suppress the interference caused by temperature fluctuation and vibration temperature change, improve the working stability of the sensor, and its various indexes are relatively good. ...

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Abstract

The invention relates to a measuring device and method for measuring temperature during an aluminum alloy thermoforming process and belongs to the field of temperature measurement. An infrared temperature measurement method is difficult to apply to an aluminum rolling production line. According to the measuring device and method for measuring temperature during the aluminum alloy thermoforming process, an objective lens is aligned with an object to be measured; energy radiated by the object to be measured enters a slit through the objective lens; the energy becomes a parallel light beam afterpassing through a collimator objective lens, and the light beam is projected onto an optical grating; the optical grating reflects the light beam to a focusing objective lens; the focusing objective lens separates light of different wavelengths, so that a light spectrum is obtained; the light spectrum is received by a line array pyroelectric sensor; the light spectrum is converted into electrical signals; the electrical signals are amplified through a driving circuit and data acquisition system; the amplified electrical signals are transmitted to an upper computer through a USB bus; and corresponding software is written on the upper computer so as to process, display and store the data; target temperature and spectral emissivity are obtained according to a multi-spectral algorithm; andthe target temperature and spectral emissivity are displayed through an LCD display. Therefore, the online high-precision measurement of the temperature of aluminum plates can be realized.

Description

technical field [0001] The invention relates to a temperature measuring device and method in the hot forming process of aluminum alloy. Background technique [0002] In the aluminum industry, in order to improve product quality and production efficiency, it is necessary to detect the temperature of aluminum plates in multiple production processes. Since the aluminum rolling process is mostly moving, it is not suitable to use contact methods such as thermocouples or thermal resistances. Since the emissivity of aluminum is very low and variable (about 0.1), the reflectivity is very high, and there may be water or oil film on the surface, the application of infrared temperature measurement in aluminum rolling production line is a difficult problem in the world. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing infrared temperature measurement method is difficult to apply in the aluminum rolling production line, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/10G01J5/02
Inventor 李喜东朱明清戴维吴冈张迁礼王刚张博文张宇叶爱英杨洋
Owner 黑龙江省科学院智能制造研究所
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