**Conflict of interest**

There is no conflict of interest between authors.

*Wearable Electromechanical Sensors and Its Applications DOI: http://dx.doi.org/10.5772/intechopen.85098*

*Wearable Devices - The Big Wave of Innovation*

chanical can be used in speech recognition.

**5.4 Human-machine interface**

**6. Conclusion and outlook**

**Acknowledgements**

**Conflict of interest**

individual speech organ is different, people can easily distinguish whether a given voice comes from the same person. This demonstrates that wearable electrome-

Human-machine interfaces and robotic remote controlling are greatly beneficial

in surgery or a highly risky work that requires the replacement of robotics. The electromechanical sensor used in human-machine interface is typically mounted on body joint, which are normally bended or stretched at large degree of deformations; thus, high stretchability (>50%) is required. The robotic controlling is demonstrated in **Figure 7**, and the wearable strain sensors are based on the hybrid of polyaniline and gold nanowires for a smart glove [9]. The sensor-based-smart glove is used to control the movement of a robot through wireless signals (**Figure 7a**). The robot is at relaxed state (a1) and works as an arm that can clamp (a2), lift up (a3), put down (a4), and release (a5) an object based on different postures of human fingers as wearing the sensor. **Figure 7b** reveals the remote control on the robot movement by a strain sensor based on graphene. As can be seen in this figure, b1 and b4 demonstrate the robot at the relaxed state. As the strain sensor is stretched or bended, the

robot starts working (b2 and b5) and moves to the controller (b3 and b6).

cost is developing novel fabrication methods, which can readily build high-

quantitative analysis, which requires further investigations.

A2), (009/2017/AMJ), Macao SAR (FDCT).

There is no conflict of interest between authors.

In this chapter, we discuss the working mechanism, fabrication methods, and applications of wearable electromechanical sensors. Piezoresistive sensor attracts more attentions due to its clear structure, mechanism, fabrication methods, and low cost. High sensitivity and stretchability have been achieved simultaneously. However, the stability and linearity are still limited for resistive-type sensor. Moreover, mass production with low cost is still a challenge. One strategy to reduce

performance sensor. Many applications have been demonstrated in a qualitative way by using strain or pressure sensor. However, the practical application needs more

This work is supported by the Start-up Research Grant (SRG2016-00092- IAPME), Multi-Year Research Grant (MYRG2018-00079-IAPME) of University of Macau, Science and Technology Development Fund (081/2017/A2), (0059/2018/

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