Intelligent safety door

A motorized door for closing an area, said area being defined by a first and second lateral edges which extend parallel to a longitudinal axis, X1, by a proximal transverse edge extending parallel to a transverse axis, X2, normal to the longitudinal axis, X1, and a distal transverse edge, transverse to the longitudinal axis, X1, wherein said motorized door comprises:

• (A) a shutter sized to close the area, and comprising a leading edge substantially parallel to the distal transverse edge of the area,
• (B) a motorized driving mechanism configured to move the leading edge of the shutter along the longitudinal axis, X1, between an open position, wherein the leading edge is adjacent to the proximal transverse edge and a closed position, wherein the leading edge contacts the distal transverse edge, in a first direction to close said area and in a second direction to open said area;
• (C) an array of n detection cells (s1, s2, . . . , sn), wherein n≥2, distributed along the leading edge of the shutter, each respective detection cell of said array of n detection cells being adapted to detect and communicate to a processing unit (CPU) a presence of a body and a distance, Δx, from said respective detection cell measured along the longitudinal axis, X1, to the body positioned between said respective detection cell and the distal transverse edge,
• (D) the processing unit (CPU) programmed to receive signals from each of the n detection cells and to trigger the following operations, in case a number n1 of the array of n detection cells, with n1≥1, communicates to the CPU the detection of the presence of the body located at a distance, Δx, of less than or equal to a predefined safety distance, Δxs, from said detection cell, Δx<Δxs, during the moving in the first direction of the shutter at a service closing speed, v1, from the open position towards the closed position,
• (a) in case a proportion, P=n1/n, of respective detection cells of the array of n detection cells identifying the presence of the body at a same time located at the distance, Δx≤Δxs, is less than or equal to a predefined safety proportion, Ps, (P≤Ps) the CPU is programmed to instantly stop the movement of the leading edge in the first direction, and optionally reverse said movement into the second direction;
• (b) in case the proportion, P, of respective detection cells of the array of n detection cells identifying the presence of the body at the same time located at the distance, Δx≤Δxs, is greater than the safety proportion, Ps, (P>Ps), the CPU is programmed to communicate a signal to progressively reduce the closing speed of the leading edge in the first direction, down to a stop upon contacting said body at Δx=0.