Design And Implementation Of Infant Crying Detection And Alarm System

Crying is the babies'instinctual response.Crying and making a fuss is an important way for babies to express their feelings and respond to the stimulations of the world,and different crying voices indicate different response needs.With the rapid development of the technology of Internet of Things(Io T),intelligent baby monitoring technology has become a research hotspot.The babies'cry detection and alarm system can effectively reduce the pressure on parents to take care of their babies.This project takes digital signal processor as the core and combines the Internet of Things module to realize the collection,processing,transmission and alarm information sending of the crying of the babies.The main contents of this topic are as follows:1.To analyze the requirements of the babies'cry alarm system,and to choose the system's core processor,sound collecting module and Io T module to form the system design plan;2.The design of the hardware part of the system uses TMS320C5535 as the core processor,adopts TLV320AIC3204 voice codec to collect sounds.This design realizes network communication with WH-NB73 Io T module,and combines with other peripheral circuits to complete the hardware platform construction of the babies'cry detection and alarm system;3.The software part of the system takes the simple real-time operating system DSP/BIOS as the platform.The collected audio data is sent to the DSP through the I~2S interface,and the endpoint detection of the audio signal is performed with the improved endpoint detection method.MFCC is adopted as a characteristic parameter,and this design realizes sound recognition through HMM and send the recognition result to Io T module through UART interface,and Io T module will send the alarm information to the client through transparent transmission cloud;4.To set up a test environment and test the babies'cry alarm system from two aspects of function and performance.Experiments show that the improved endpoint detection method effectively improves the accuracy of recognizing the babies'cry,and the recognition rate of test samples reaches 95%;5.Finally,this design summarizes the system and imagines the future of it,confirms the feasibility of the system design scheme,and analyzes the later improvement and extension of the babies'cry alarm system.