Trapping Prevention Guard and Method for Controlling a Motor-Driven Adjusting Device
First Claim
1. A trapping prevention guard for an adjusting device, the trapping prevention guard comprisinga motorized drive anda control unit that is configured to derive a total load exerted by the motorized drive from at least one detected characteristic variable of the motorized drive in order to monitor for a trapping instance,wherein the control unit is configured to derive an initial total load during a start phase at the beginning of an actuation operation of the adjusting device and to store the initial total load as the nominal load of the adjusting device, andwherein the control unit is configured to determine whether trapping has occurred during a monitoring phase from a comparison between the nominal load and the total load which varies during the actuation operation of the adjusting device.
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Accused Products
Abstract
In order to reliably detect a jamming situation, in particular in a seat adjusting means, provision is made for a total loading exerted by the drive during a start phase to be determined and for this to be fixed as the basic loading. The existence or non-existence of a jamming situation is finally determined during a monitoring phase by comparing the gasinc loading and the total loading that varies during operation of the adjusting apparatus.
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Citations
22 Claims
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1. A trapping prevention guard for an adjusting device, the trapping prevention guard comprising
a motorized drive and a control unit that is configured to derive a total load exerted by the motorized drive from at least one detected characteristic variable of the motorized drive in order to monitor for a trapping instance, wherein the control unit is configured to derive an initial total load during a start phase at the beginning of an actuation operation of the adjusting device and to store the initial total load as the nominal load of the adjusting device, and wherein the control unit is configured to determine whether trapping has occurred during a monitoring phase from a comparison between the nominal load and the total load which varies during the actuation operation of the adjusting device.
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20. A trapping prevention guard for an adjusting device, the trapping prevention guard comprising
a motorized drive and a control unit configured to determine a characteristic variable of the motorized drive and to evaluate the characteristic variable using a first mathematical model in order to monitor for a trapping instance, and wherein the control unit is configured to changeover to a second mathematical model that takes into account the trapping instance if there is a significant deviation in the characteristic variable for assessing whether trapping has occurred.
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21. A method for controlling a motor-driven adjusting device, the method comprising
deriving a total load exerted by the drive from at least one detected characteristic variable of the motorized drive in order to monitor for a trapping instance, wherein the total load is first derived during a start phase in each case at the beginning of an actuation operation of the adjusting device and stored as the nominal load of the adjusting device, and determining whether trapping has occurred during a monitoring phase from a comparison between the nominal load and the total load which varies during the actuation operation of the adjusting device.
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22. A trapping prevention guard for an adjusting device, the trapping prevention guard comprising
a motorized drive and a control unit that is configured to derive a total load exerted by the motorized drive from at least one detected characteristic variable of the motorized drive in order to monitor for a trapping instance, wherein the control unit is configured to determine whether trapping has occurred during a monitoring phase from a comparison between a nominal load and a total load which varies during the actuation operation of the adjusting device.
Specification