基于蓝牙通信的智能床垫设计

本科毕业论文基于蓝牙通信的智能床垫设计AbstractA large part of a person's life is spent in sleep,whether there is enough and qualitysleep an important standard when judging if a person is heathy,and in deciding the factorsof sleep comfort,mattress is an extremely important one.The mattress on the market nowis the spring mattress that hardness fixes mostly,cannot adjust the soft and hard degreeof mattess according to individual need.Using such mattess for a long time,can cause theplace such as vertebra,cervical vertebra and buttocks to have additional pressure load,cause uncomfortable feeling,go down for a long time can cause the curvature of human bodyto produce change eventually,can cause cervical spondylosis,lumbar intervertebral discis herniated,vertebra is curved wait for pathological changes.And to design a mattressthat accords with the pressure distribution when human body sleeps,a human bodydistributive pressure measurement system is important.Human body distributed pressure measurement system mainly consists of three parts:pressure sensor array,signal switching circuit and SCM control part.Among them,thepressure sensor chooses the pressure strain gauge,which is cheap,stable,easy to integrate,wide measurement range and good dynamic performance.The signal switching circuit is basedon the CD4051 chip and is capable of A/D conversion of multiple voltage signals at onetime.STC89C52 microcontroller is selected,and the signal switching circuit is controlledby the microcontroller program to display the pressure value and send the pressure valueto the upper computer through serial communication for subsequent processing.In addition,as people now pay more and more attention to their own health,in orderto prevent a variety of sleep in the disease,mattress is also added to the heart rate sensorand temperature sensor.It can monitor the heart rate and temperature during sleep in realtime and transmit the data to the handheld device via bluetooth.In addition,the upper andlower limits of the alarm can be set to send out an alarm when the alarm is out of the rangeto avoid the occurrence of danger.Key words:pressure distribution,sensor,smart mattress,bluetooth