A Method for Measuring Liquid Absorption Coefficient Under Applied Electric Field Condition
A technology of applied electric field and absorption coefficient, applied in transmittance measurement and other directions, can solve problems such as the design scheme and measurement method of absorption coefficient measurement device and the liquid absorption coefficient that have not been seen yet.
Active Publication Date: 2018-01-05
HARBIN INST OF TECH
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Problems solved by technology
Summarizing the existing reports, it can be found that almost all of the existing studies measure the absorption coefficient of liquids under normal conditions, and there is no report on how to measure the absorption coefficient of this type of liquid that changes the absorption coefficient under the action of an applied electric field.
However, for special media such as electrorheological fluids or ionic liquids, whose absorption coefficient will change under the action of an applied electric field, there is no design scheme and measurement method for its absorption coefficient measurement device.
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Embodiment 1
[0067] use as image 3 device for measurement. Use a syringe to measure a certain amount of liquid to be tested, put it into the quartz sample cell 20, and use a needle to pierce the air bubbles in the light-transmitting range of the middle area of the sample cell 20. After the liquid spreads evenly in the sample cell 20, the positive and negative electrodes of the DC power supply are respectively connected to the platinum wires on the sample cell 20, and the voltage of the DC power supply is set to 0V. Put the quartz sample cell 20 into the spectrometer. If the sample chamber itself is not in a horizontal position, you need to pad a gasket at one end of the sample cell as required. The thickness of the gasket and the placement angle are calculated according to the size of the sample cell, so that the sample cell 20 is placed in the spectrometer. The sample chamber is placed horizontally. After everything is ready, start to measure the liquid transmittance according to the...
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Abstract
The invention discloses a method for measuring the absorption coefficient of a liquid under the condition of an external electric field. The method comprises steps as follows: a measurable area is determined according to the intensity of the electric field and the thickness of a sample cell in the direction of incident light; the incident light is emitted to the measurable area of the sample cell in the direction perpendicular to the electric field, first radiation intensity of the incident light and second radiation intensity of the incident light passing through the empty sample cell are acquired, and the transmittance of the empty sample cell is determined according to the first radiation intensity and the second radiation intensity; the incident light is emitted to the measurable area of the sample cell containing the to-be-tested liquid in the direction perpendicular to the electric field, third radiation intensity of the incident light passing through the sample cell containing the to-be-tested liquid is acquired, and the transmittance of the to-be-tested liquid is determined according to the first radiation intensity and the third radiation intensity; the absorption coefficient of the to-be-tested liquid is determined on the basis of the thickness of the sample cell, the transmittance of the empty sample cell and the transmittance of the to-be-tested liquid. With the adoption of the method, the change of the absorption coefficient of the liquid under the action of the external electric field can be accurately measured.
Description
technical field [0001] The invention relates to the field of physical parameter measurement, in particular to a method for measuring liquid absorption coefficient under the condition of an external electric field. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] Electrorheological fluids or ionic liquids will have a certain change in the absorption coefficient of light under the action of an external electric field. This characteristic can be applied to fields such as electrochromism, smart glass or stealth materials. In terms of building energy saving (for example, adjusting the transmittance of sunlight according to needs in different seasons and climate changes to reduce heating and cooling losses) and protecting personal privacy (for example, in some public facilities such as public telephone booths, change ...
Claims
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IPC IPC(8): G01N21/59
CPCG01N21/59
Inventor 贺志宏周吉董士奎黄兴帅永
Owner HARBIN INST OF TECH