Identification of filter media within a filtration system
First Claim
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1. A filter cartridge comprising:
- a filter housing comprising an inlet through which untreated fluid enters and an outlet from which treated fluid exits;
a filter media contained within the filter housing configured to treat the fluid passing through the filter housing;
a region of the filter housing configured to connect to a fluid manifold connecting the inlet and the outlet; and
an electromagnetic identification device attached to or within the filter housing and configured to modify an electromagnetic field generated by a filter media sensor system,wherein the identification device is configured to have a resonant frequency that is higher than a base frequency of the electromagnetic field generated by the filter media sensor system.
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Abstract
In general, techniques are described for filter media monitoring within a filtration system. The filter media monitoring techniques described herein include, for example, direct contact with the filter media, e.g., a sensor may be located inside a boundary defined by a surface of the filter media, or indirect contact with the filter media, e.g., a sensor may be located outside the boundary defined by the surface of the filter media such that the sensor does not make direct physical contact with the filter media being monitored.
199 Citations
14 Claims
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1. A filter cartridge comprising:
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a filter housing comprising an inlet through which untreated fluid enters and an outlet from which treated fluid exits; a filter media contained within the filter housing configured to treat the fluid passing through the filter housing; a region of the filter housing configured to connect to a fluid manifold connecting the inlet and the outlet; and an electromagnetic identification device attached to or within the filter housing and configured to modify an electromagnetic field generated by a filter media sensor system, wherein the identification device is configured to have a resonant frequency that is higher than a base frequency of the electromagnetic field generated by the filter media sensor system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A filtration system comprising:
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a filter housing comprising an inlet through which untreated fluid enters and an outlet from which treated fluid exits; a filter media contained within the filter housing configured to filter particles from the fluid passing through the filter housing; a filter sensor comprising an antenna and a controller electrically coupled to the antenna and configured to drive an electric signal through the antenna to generate an electromagnetic signal configured to couple to at least a portion of the filter media via near-field coupling; and an electromagnetic identification device disposed on or in the filter housing and configured to modify the electromagnetic field generated by the filter sensor. - View Dependent Claims (11, 12, 13, 14)
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Specification