Wearable sensors can easily receive any information from any part of the body. This specific area and movement of the body. Therefore, the project attempts to replace metal threads with chips and other devices that are used as wearable sensors. In this research, three types of metal yarn with 28%, 40% and 80% metal yarn were information can include the bending and straightening of the members, pressure on the used for preparation of samples. Sewing operations were performed with two different SPIs of 8 and 18, and on two types of woven and knitted fabrics. The strength test was performed on the samples in 10 cycles and simultaneously the voltage variations of the samples were checked and recorded. Then, the resistivity of the samples was calculated and the graphs of force, voltage and resistance of the samples were plotted. Finally, the results of ANOVA were analyzed. In all specimens, the elasticity of the yarn is reduced, and hence its resistance increases. From the first to the tenth cycle, the resistance is increasing due to the fact that the amount of plastic length in the threads remains, and the thread length in the last cycles is higher than the initial cycles. By decreasing the stitching density or SPI, the resistance of the specimen increases. In general, attention should be paid to the expected characteristics of the sensor to select the fabric and metal thread to provide the sensor. For example, the local body of the sensor to be used for it and the force generated therein, the force applied to the sensor, and ultimately the stiffness of the yarn required, the amount of elongation applied to the area tested, and the required length of time Sensors and more.
