Pulse diagnosis is an irreplaceable part of traditional Chinese medical science. However, application of the traditional pulse monitoring method was restricted in the modernization of Chinese medical science since it was difficult to capture real signals and integrate obscure feelings with a modern data platform. Herein, a novel multichannel pulse monitoring platform based on traditional Chinese medical science pulse theory and wearable electronics was proposed. The pulse sensing platform simultaneously detected pulse conditions at three pulse positions (Chi, Cun, and Guan). These signals were fitted to smooth surfaces to enable 3-dimensional pulse mapping, which vividly revealed the shape of the pulse length and width and compensated for the shortcomings of traditional single-point pulse sensors. Moreover, the pulse sensing system could measure the pulse signals from different individuals with different conditions and distinguish the differences in pulse signals. In addition, this system could provide full information on the temporal and spatial dimensions of a person’s pulse waveform, which is similar to the true feelings of doctors’ fingertips. This innovative, cost-effective, easily designed pulse monitoring platform based on flexible pressure sensor arrays may provide novel applications in modernization of Chinese medical science or intelligent health care.

Wind flow regarded as a renewable energy source is present everywhere in indoor or open environments. A self-sustained flow-sensing microsystem is especially desirable in future applications of smart home, remote sensing and environmental monitoring. Piezoelectric thin films are commonly adopted in microenergy harvesters for converting the mechanical strain into an electrical charge based on the piezoelectric effect. It is also a promising candidate for flow sensors because of its passive nature, that is, the detectable output charge is a function of flow rate. The aim of this reported work has been to investigate the flow sensing and energy harvesting capabilities of a flexible piezoelectric Pb(Zr0.52, Ti0.48)O 3 (PZT) microcantilever under wind flow. A self-sustained flow-sensing microsystem is possible by integrating the arrays of PZT microcantilevers, which measure the flow rate of ambient wind by one microcantilever and scavenge wind-flow energy as a power source by the rest.

and positions between the robots and the interacted objects. [6] Thus, various kinds of the pressure sensors have been designed and applied as different force sensing interfaces. [7,8] Although the pressure sensors are attracting great attention in robot field, the limited sensing function, rigid structure and complicated back-end data processing still raise the requirements of further advancement in the robot safety detection. Flexible electronic skin (e-skin) has been widely applied in wearable devices, artificial prosthetics, health monitoring, and smart robots as it can mimic human skin functions and convert the external stimuli into different output signals through various sensors. [9-12] Among them, tactile e-skin is drawing the attention, including human-computer interfaces, medical and security systems. [13-16] Generally, the tactile sensors based on capacitive, [17,18] piezoelectric, [19-21] resistive, [22-24] and optical [25] mechanisms rely on the deformation produced by the interaction between the sensing unit and the object. Thus, the tactile sensor will occasionally generate the unstable and insensitive signals and lead to poor detection for very weak interactions. Meanwhile, the tactile sensors often require the external power source to sense the environmental stimuli. In addition, it is noted that the reported tactile sensors are mainly focusing on the tactile sensing without the direct visualization capability. The skin of specific animal species has extra functions that can change their colors when they are activated by external stimuli. Both vertebrates and invertebrates use various strategies for visualization and camouflage. For example, Chameleons can prey, camouflage protection, and even communicate through the ability of color changing. [26] Inspired by this, it is also possible to mimic the color conversion function of chameleons through mechanical or electronic equipment. [27-30] Whitesides and his colleague reported a soft machine with a microfluidic channel that could be filled or rinsed by pumping a colored liquid. [31] Rogers's team fabricated an adaptive optoelectronic camouflage system that used a bright-colored composite, producing a black-and-white pattern to match the surrounding environment. [32] A soft material system presented by Wang et al. produced voltage-controlled on-demand fluorescent patterns which could be modulated to display a variety of geometries. [33] However, these mentioned devices can only

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