Anti-entrapment system
An anti-entrapment system for preventing an object from being entrapped by a translating device such as a vehicle window includes a capacitance sensor and a controller. The sensor has a jacket with a cavity, a dielectric element within the cavity, and first and second electrical conductors. The conductors are within the cavity on opposite sides of the dielectric element such that the conductors are separated from one another by a separation distance. The capacitance of the sensor changes in response to an electrically conductive object moving in proximity to at least one of the conductors. The controller is configured to control a translating device as a function of the capacitance of the sensor. The jacket is attachable to a seal configured to receive the translating device.
1. A sensor comprising:
a jacket having a cavity;
a dielectric element within the cavity; and
first and second electrical conductors, wherein the conductors are within the cavity on opposite sides of the dielectric element such that the conductors are separated from one another by a separation distance;
wherein the capacitance of the conductors changes in response to an electrically conductive object moving in proximity to at least one of the conductors;
wherein the jacket is attachable to a seal configured to receive a translating device.
2. The sensor of claim 1 wherein:
the sensor is configured such that the separation distance of the conductors changes upon an object touching the jacket, wherein the capacitance of the conductors changes in response to the separation distance of the conductors changing.
3. The sensor of claim 1 wherein:
the jacket includes an elastomer.
4. The sensor of claim 1 wherein:
the jacket includes a thermoplastic rubber.
5. The sensor of claim 1 wherein:
the jacket includes angled side walls configured to function as a dovetailing feature for attachment of the jacket to a seal of a translating device or directly to the translating device.
6. The sensor of claim 1 wherein:
the dielectric element is compressible.
7. The sensor of claim 1 wherein:
the dielectric element is non-compressible.
8. The sensor of claim 1 wherein:
the dielectric element includes a dielectric elastomer.
9. The sensor of claim 1 wherein:
the dielectric element includes a polyurethane foam.
10. The sensor of claim 1 wherein:
the dielectric element is co-extruded into the cavity.
11. The sensor of claim 1 wherein:
at least one of the conductors includes a braided electrically conductive wire.
12. The sensor of claim 1 wherein:
at least one of the conductors includes a conductor plate.
13. The sensor of claim 12 wherein:
the conductor plate has a serpentine pattern for spaced slots.
14. A system comprising:
a capacitance sensor having a jacket with a cavity, a dielectric element within the cavity, and first and second electrical conductors, wherein the conductors are within the cavity on opposite sides of the dielectric element such that the conductors are separated from one another by a separation distance, wherein the capacitance of the sensor changes in response to an electrically conductive object moving in proximity to at least one of the conductors; and
a controller configured to control a translating device as a function of the capacitance of the sensor;
wherein the jacket is attachable to a seal configured to receive a translating device.
15. The system of claim 14 wherein:
the sensor is configured such that the separation distance of the conductors changes upon an object touching the jacket, wherein the capacitance of the sensor changes in response to the separation distance of the conductors changing.
16. The system of claim 14 wherein:
the translating device is a vehicle window.
17. The system of claim 14 wherein:
at least one of the conductors includes a braided electrically conductive wire.
18. The sensor of claim 1 wherein:
the translating device is a vehicle window.
19. The sensor of claim 1 , wherein the sensor is formed integral with the seal.
20. The system of claim 14 , wherein the sensor is formed integral with the seal.