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Skin moisture measuring method

A measurement method and skin moisture technology, which are applied in the directions of diagnostic recording/measurement, medical science, special data processing applications, etc., can solve the problems of complex structure, high cost, and high measurement frequency of skin moisture measurement devices.

Inactive Publication Date: 2007-11-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex structure, high measurement frequency and high cost of the skin moisture measuring device in the prior art

Method used

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  • Skin moisture measuring method
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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1 shows the structural diagram of human skin. From the surface to the inside, there are 100 layers of stratum corneum (thickness 5-10 μm), epithelial tissue 200 (thickness 100-200 μm), dermis tissue 300 (thickness 2-4 mm) and hypodermis. Tissue 400. Among them, the moisture content of the outer stratum corneum 100 is the most influential to the health of the skin, and the object to be measured in the present invention is the moisture content of the stratum corneum outer layer 100 .

[0016] Fig. 2 is a schematic diagram of a measuring device for implementing the method of the present invention. A measuring device for implementing the method of the present invention is mainly composed of four parts and two electrodes, which are respectively a square wave generator 1, a capacitor 2, a resistor 3, an amplifying element 4 and a probe electrode. An excitat...

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Abstract

A method for measuring the water content of skin includes making a probe contact with skin to be measured, transmitting square wave signals at 50 KHz or lower, measuring impedance value, amplifying, A / D conversion, storing the value in single-chip computer, and comparing it with the voltage-water content values in a table to obtain the water content.

Description

technical field [0001] The invention belongs to the technical field of bioelectrical impedance measurement, in particular to an electrical impedance measurement method for measuring the water content of human skin. Background technique [0002] Human skin is mainly composed of three tissues: subcutaneous tissue, dermal tissue and epithelial tissue. The outermost part of the epithelial tissue is the outer stratum corneum which is tightly packed with more than 20 layers of epithelial cells. Although the outer stratum corneum is only about 20um thick, this protein film covers all surfaces of the human body and plays an important role in maintaining life activities in the external environment. The outer stratum corneum is an effective barrier against bacteria and chemicals. At the same time, it keeps the body's water evaporation at a very low level, only 0.2 to 0.5mg / h / cm 2 , which allows people to live in extremely dry environments. When it is in a healthy state, it contains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/05A61B5/053A61B5/04A61B5/00G06F17/00
Inventor 董永贵周国麟吕文尔
Owner TSINGHUA UNIV