Reseach on micro-sensor system to measure skin

角质层含水量可作为评价皮肤健康状况的一个指标，我们研制了一种微传感器和小型测量系统，并讨论了日常生活环境对皮肤的影响。我们开发的传感器尺寸为5mmX5mm，两个电极条之间的间距约为15 μm，与传统的皮肤阻抗测量系统相比，这一电极距离显着缩短，如果传感器芯片的薄膜侧压在人体皮肤上，则电容的变化可用于测量皮肤的含水量。我们还开发了另一种具有保护膜和细连接的传感器。我们开发了一种新的测量方法。它给出了不同频率的电流，并测量了每个频率的电特性，我们设置了新的参数来了解含水量，以检查频率与测量数据的关系。最后，我们开发了小型便携式电路，并与计算机连接，实现了一种新的测量方法。我们比较了正常皮肤、特应性（干性）皮肤和保湿剂湿润皮肤的测量结果，得到了良好的结果。我们。全面开发含水量微传感器系统，建立皮肤功能测量基础技术。

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.