Miniaturized stereoscopic thermal sensor for an automatic counting device
AssigneeKiomda
InventorJean-Claude Dubois
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Abstract
The subject matter of the present invention concerns a sensor for counting and/or determining the direction of passage of objects and/or living beings, each having a thermal signature, comprising or consisting of: a pyroelectric component, preferably digital, integrating at least two pairs of detection cells; and one cell of which is masked in each pair of cells. The present invention further concerns a mechanical passage collecting unit comprising such a sensor and an optical lens. The present invention further concerns the use of such a sensor, for example in the form of a mechanical passage collecting unit, in a device. The present invention concerns the device as such. The present invention also concerns the sensor data processing algorithm.
Claims13
A mechanical passage collecting unit comprising:
- at least one sensor for counting and determining a direction of passage of objects and/or living beings, each having a heat signature, said at least one sensor comprising:
- a pyroelectric component integrating at least two pairs of cells;
- and
- each pair of cells comprises a masked thermal reference cell and an unmasked thermal detection cell;
- at least one optical lens arranged in front of the pyroelectric component of said at least one sensor;
- wherein said at least two pairs of cells of the said at least one sensor are in a focal plane of the said at least one optical lens or the at least one optical lens and the at least one sensor are adjusted in such a way that the at least two pairs of cells of the at least one sensor are close to the focal plane of the at least one optical lens.
Dependencies are inferred from the claim text.