The present invention discloses a skylight operating system of a modular data center, so as to timely respond to a firefighting requirement of the modular data center to reduce occurrence of firefighting-related accidents. The skylight operating system comprises: an electric skylight; a firefighting environment index monitoring device arranged inside the modular data center; a monitoring and interacting device arranged in a monitoring room outside the modular data center, and connected with the electric skylight and the firefighting environment index monitoring device, the monitoring and interacting device adapted for receiving monitoring information of the firefighting environment index monitoring device, and opening the electric skylight upon determination that a firefighting-related issue occurs inside the modular data center.

A control system for a door includes: a controller; a door motor configured to be operatively connected to the controller; an object sensor configured to be operatively connected to the controller and to detect a presence of an object; and an operation sensor configured to be operatively connected to the controller and to detect movement of a door, and wherein the controller is configured to send a operation signal to the door motor to cause the door motor to operate when the controller detects both: a signal from the object sensor indicating that the operation sensor has detected the presence of and object; and a signal from the operation sensor indicating that the operation sensor has detected movement.

A control system for a door includes: a controller; a door motor configured to be operatively connected to the controller; an object sensor configured to be operatively connected to the controller and to detect a presence of an object; and an operation sensor configured to be operatively connected to the controller and to detect movement of a door, and wherein the controller is configured to send a operation signal to the door motor to cause the door motor to operate when the controller detects both: a signal from the object sensor indicating that the operation sensor has detected the presence of and object; and a signal from the operation sensor indicating that the operation sensor has detected movement.

Electro-mechanical and electronically controlled access devices are described for automatically controlling passage between two areas, and where a plurality of such access control devices may be ganged or clustered to provided additional throughput and directional control, including stacking a plurality of access control devices side by side within a cluster. Each access control device contains multiple rotatable and moveable door panels. The door panels are controlled by various drive mechanisms to enable passage through the device, while ensuring by the use of sensors that door panels avoid touching subjects as they traverse the device. The direction of flow through a device according to these embodiments is electronically controlled and may be changed from time to time. At any instant in time while being traversed, the flow through each device is unidirectional. Multiple devices within a cluster can be directionally controlled according to traffic, demand, time of day, or other factors.

Electro-mechanical and electronically controlled access devices are described for automatically controlling passage between two areas, and where a plurality of such access control devices may be ganged or clustered to provided additional throughput and directional control, including stacking a plurality of access control devices side by side within a cluster. Each access control device contains multiple rotatable and moveable door panels. The door panels are controlled by various drive mechanisms to enable passage through the device, while ensuring by the use of sensors that door panels avoid touching subjects as they traverse the device. The direction of flow through a device according to these embodiments is electronically controlled and may be changed from time to time. At any instant in time while being traversed, the flow through each device is unidirectional. Multiple devices within a cluster can be directionally controlled according to traffic, demand, time of day, or other factors.

A control arrangement (20) for an entrance system (10) has one or more movable door members (D1 . . . Dm) and an automatic door operator (30) for causing movements of the one or more movable door members (D1 . . . Dm) between closed and open positions. The control arrangement (20) comprises a controller (32) and a plurality of sensors (S1 . . . Sn). Each sensor is connected to the controller (32) and is configured to monitor a respective zone (Z1 . . . Zn) at the entrance system (10) for presence or activity of a person or object. Each sensor (S1 . . . Sn) has an active mode and an inactive mode, wherein the sensor consumes no electric power in the inactive mode or substantially less electric power in the inactive mode than in the active mode. The controller (32) is configured to determine a current operational state of the entrance system (10) among a plurality of possible operational states, and selectively cause at least one of the sensors (S1 . . . Sn) to be in its active mode or in its inactive mode depending on the determined current operational state of the entrance system (10).

An entryway system has at least one door having access hardware on both sides. The access hardware on both sides each have a first handing position that operates a latch and a second handing position that prevents latch operation. In response to a sensed condition, such as a trigger from a metal detector or other sensing device, one or both of the access hardware can be selectively re-handed from the first handing position to the second handing position.

A protective subsea housing for protecting an equipment space enclosed by the housing has an access opening in a wall of the housing for providing access to the equipment space by an unmanned underwater vehicle (UUV). The housing has a closure that is movable by translation, or by rotation relative to an axis transverse to or extending through the wall, to open and close the access opening, and an operating member, such as a rotary coupling, that is positioned outside the equipment space and is engageable and movable by the UUV to move the closure.

According to the present embodiment, a serving module includes: a tray; a main body formed therein with a tray space configured to accommodate the tray and having a tray entrance; a tray moving device configured to move at least a part of the tray out of the tray entrance or move an entire of the tray into the tray space; a door configured to open and close the tray entrance; and a door driving device connected to the door to open and close the door.

According to the present embodiment, a serving module includes: a tray; a main body formed therein with a tray space configured to accommodate the tray and having a tray entrance; a tray moving device configured to move at least a part of the tray out of the tray entrance or move an entire of the tray into the tray space; a door configured to open and close the tray entrance; and a door driving device connected to the door to open and close the door.