| 摘要 |
<p>The invention relates to a device for detecting the presence of articles in a space, comprising: means for determining a location for each of the articles in the space; and a detector arranged at each location for detecting the presence of an article at the relevant location, wherein the detector is adapted to react to the displacement of a part of the detector caused by the force of gravity, wherein the detector is a solid-state detector. Solid-state detectors are not susceptible to wear, or hardly so, while being equally insensitive to moisture. It is therefore recommended that the detected comprises a magnet and an element reacting to a change in the magnetic field caused by the magnet. This is a type of detector which is wholly insensitive to dirt and moisture. According to another preferred embodiment the element reacting to the magnetic field is a Hall element. Hall elements are small and have a low energy consumption.</p> |
