Patent ID: 7307395

Claim:
Sequential control method for a moving panel ( 4 ) which is driven so as to slide in a frame ( 2 ) by an electric motor ( 6 ), including a first sequence consisting in: detecting by first means the presence of a foreign body capable of preventing the complete closing of the moving panel ( 4 ) by becoming caught between said panel ( 4 ) and the frame ( 2 ) into which said panel ( 4 ) slides, these first means being capable of generating a first alarm when the presence of said foreign body is detected; and measuring by second means the frequency of the pulses caused by the rotation of the electric motor ( 6 ) driving the moving panel ( 4 ), and deducing from this measure an indication of the travel of the moving panel ( 4 ) from a known reference position beforehand, these second means being also capable to detect the presence of the foreign body when the frequency of the pulses becomes less than a predetermined threshold frequency and to produce a second alarm when this presence is detected; wherein, during the phase in which moving panel ( 4 ) rises and until it reaches the vicinity of an end-of-travel zone in which the panel ( 4 ) has only a distance (I) to cover before its complete closing, stopping, then reversing the working direction of the driving motor ( 6 ) is commanded upon reception of the first and/or second alarm signal, and wherein, during the ascent of the moving panel ( 4 ) over the remaining distance (I) until its complete closing, only the first means are used to detect the presence of the foreign body, whereas the second means are only used to determine the position of said panel ( 4 ) with respect to the frame ( 2 ) into which it slides.