A Novel Design of Wearable Automatic Stress Detecting Device for Women Safety Using Heart Rate Variability

This paper presents the design of novel device to identify abnormal heart rate variability (HRV) due to anxiety in threatening circumstances, and to automatically relay alert along with location coordinates to the pre-saved phone numbers through global system for mobile communication (GSM), in order to acquire help. Physical activities change heart rate but not HRV whereas fight-or-flight response causes change in both. It is found that, with the help of HRV measurement it is possible to distinguish the changes in electrical activity of the heart due to physical activities and acute stress. The proposed design can also be used to know the abnormal conditions of heart patients and to provide timely help.