Reseach on micro-sensor system to measure skin

角质层中的水分含量可以作为评价皮肤健康的一个指标，我们研制了微型传感器和小型测量系统，并讨论了日常生活条件对皮肤的影响。我们研制的传感器尺寸为5 mm×5 mm，两电极条之间的间距约为15μm，与传统的皮肤阻抗测量系统相比，这一电极距离明显较小，如果将传感器芯片的膜侧按在人体皮肤上，则电容的变化可以作为皮肤水分的测量。我们还开发了另一种具有保护膜和良好连接的传感器。我们开发了一种新的测量方法。给出了不同的频率电流，测量了各个频率的电特性，并通过新的参数来确定含水率，以检验频率与测量数据之间的关系。最后，研制了一种小型便携式电路，并与计算机连接，实现了一种新的测量方法。我们对正常皮肤、特应性(干燥)皮肤和保湿剂保湿皮肤的测量结果进行了比较，得到了较好的结果。我们。完全开发了水分微型传感器系统，并建立了测量皮肤功能的基础技术。

The water content in the stratum corneum could be one index to evaluate the skin health, we have developed a microsensor and a small measurement system, and discuss the influence to skin from the environment of daily living conditions. The dimensions of the sensor which we developed is 5mmX5mm and a gap of about 15 μm between two electrode strips, This distance of electrodes is significantly smaller compared to conventional skin impedance measuring systems, If the film side of the sensor chip is pressed onto human skin, the change of capacitance can be used as a measure for the water content of the skin. We also developed another type sensors which had protection membrane and fine connection. We developed a new measurement method. It gives different frequences current and measure the electric characteristic each of frequences, we made new parameter to know the water content to check the relation between frequences and measured data. Finaly, we developed the small portable electric circuit and connected to a computer to realize a new measurment method. We compare measuring results on normal skin, atopic (dry) skin and skin moisturized by a humectant, we got good results. We. totally developed microsensor system for water content and established basic technology to measure skin functions.