| http://www.w3.org/ns/prov#value | - That is, there is a need for a new type of sensor without the disadvantages above.Hence, the object of the present invention is to construct a bed sensor that does not possess the above-mentioned disadvantages.This can be provided by constructing a pressure sensor according to the present invention and that is small and can be placed under the mattress to safely detect if a person is present in a
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