Internet of things (IOT)-based bed wireless sensing device
A wireless sensing and Internet of Things technology, applied in the field of Internet of Things, can solve the problems of missing, falling, falling, etc. in welfare homes, and achieve the effect of improving operability, improving reliability, and convenient installation and use
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Embodiment 1
[0021] Such as Figure 1~Figure 3 As shown: when in use, place the pressure sensing element 14 on the elastic body 12, and then install the pressure receiving body 16 on the elastic body 12, and a strain chamber 15 is provided between the pressure receiving body 16 and the pressure sensing element 14; Then the housing 9 is fixedly installed on the elastic body 12 to form the bed pressure sensor 1 . Install the bed pressure sensor 1 at the bottom of the four bed feet of the bed. The output wire 10 of the bed pressure sensor 1 is connected to the signal acquisition and processing module 2, and the ADC conversion module of the signal acquisition and processing module 2 uses 10-bit sampling rate to carry out bed weight signal acquisition to the bed pressure sensor 1; The resolution is 1023 divisions, the maximum weight on the bed is set to 250 kg, (including the weight of the bed itself) the weight division value output by the single-chip microcomputer is approximately equal to 0...
Embodiment 2
[0024] Such as Figure 1~Figure 3As shown: when in use, place the pressure sensing element 14 on the elastic body 12, and then install the pressure receiving body 16 on the elastic body 12, and a strain chamber 15 is provided between the pressure receiving body 16 and the pressure sensing element 14; Then the housing 9 is fixedly installed on the elastic body 12 to form the bed pressure sensor 1 . Install the bed pressure sensor 1 at the bottom of the four bed feet of the bed. The bed pressure sensor 1 is connected to the signal acquisition and processing module 2, and the ADC conversion module of the signal acquisition and processing module 2 uses a 16-bit sampling rate to collect, so that the resolution of the weight change on the bed is 65535 divisions, and the maximum weight on the bed is set to 250 kg, (including the weight of the bed itself) the weight division value output by the single-chip microcomputer is approximately equal to 3.8 grams. During work, the signal ac...
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