An anti-collision system and an anti-collision method are disclosed. The anti-collision system includes a first circuit and a magnetic device arranged on the door body and the door frame respectively, the first circuit includes a first power source, a first coil, and a first switch circuit connecting the first power source and the first coil; when a speed sensor detects that the rotation speed of the door body is too high, a control terminal controls the first switch circuit to switch on, such that the first coil is connected to the first power source to generate a first magnetic field, which causes a repulsive force to reduce the rotation speed of the door; when the rotation speed of the door body is reduced to a preset value, the control terminal controls the first switch circuit to switch off, the repulsive force disappears, and the door body is closed smoothly.

An anti-collision system and an anti-collision method are disclosed. The anti-collision system includes a first circuit and a magnetic device arranged on the door body and the door frame respectively, the first circuit includes a first power source, a first coil, and a first switch circuit connecting the first power source and the first coil; when a speed sensor detects that the rotation speed of the door body is too high, a control terminal controls the first switch circuit to switch on, such that the first coil is connected to the first power source to generate a first magnetic field, which causes a repulsive force to reduce the rotation speed of the door; when the rotation speed of the door body is reduced to a preset value, the control terminal controls the first switch circuit to switch off, the repulsive force disappears, and the door body is closed smoothly.

An anti-collision system and an anti-collision method are disclosed. The anti-collision system includes a first circuit and a magnetic device arranged on the door body and the door frame respectively, the first circuit includes a first power source, a first coil, and a first switch circuit connecting the first power source and the first coil; when a speed sensor detects that the rotation speed of the door body is too high, a control terminal controls the first switch circuit to switch on, such that the first coil is connected to the first power source to generate a first magnetic field, which causes a repulsive force to reduce the rotation speed of the door; when the rotation speed of the door body is reduced to a preset value, the control terminal controls the first switch circuit to switch off, the repulsive force disappears, and the door body is closed smoothly.

Apparatuses, methods, and systems for providing a locking apparatus for resisting movement of an openable element are described. The locking apparatus includes a body, an actuator, a lifting member, at least a portion of the lifting member being configured to be raised or lowered relative to the body according to an output of the actuator, the lifting member comprising a contact surface configured to restrict movement of the openable element, and a strap coupled to the body and to the lifting member, the strap configured to permit the lifting member to flex based at least in part upon contact between the lifting member and the openable element and to transfer energy received at the lifting member into the body of the locking apparatus into a surface to which the locking apparatus is mounted.

A door closer system having a door closer that includes at least one sensor configured to sense an operating characteristic or condition relating to the door closer including a position or speed of displacement of at least a portion of the door closer or an associated entryway device. The sensor(s) can also provide information relating to the performance or condition of one or more components of the door closer, such as the operation of a backcheck mechanism, as well as tracking the number of door cycles. Information obtained by the sensor(s) of the door closer system can be communicated to a lockset device of an entryway control system. The lockset device can be configured to communicate information received from the door closer system to an access control system, which can in turn provide the communicated information to a management system.

A door closer system having a door closer that includes at least one sensor configured to sense an operating characteristic or condition relating to the door closer including a position or speed of displacement of at least a portion of the door closer or an associated entryway device. The sensor(s) can also provide information relating to the performance or condition of one or more components of the door closer, such as the operation of a backcheck mechanism, as well as tracking the number of door cycles. Information obtained by the sensor(s) of the door closer system can be communicated to a lockset device of an entryway control system. The lockset device can be configured to communicate information received from the door closer system to an access control system, which can in turn provide the communicated information to a management system.

A door closer system having a door closer that includes at least one sensor configured to sense an operating characteristic or condition relating to the door closer including a position or speed of displacement of at least a portion of the door closer or an associated entryway device. The sensor(s) can also provide information relating to the performance or condition of one or more components of the door closer, such as the operation of a backcheck mechanism, as well as tracking the number of door cycles. Information obtained by the sensor(s) of the door closer system can be communicated to a lockset device of an entryway control system. The lockset device can be configured to communicate information received from the door closer system to an access control system, which can in turn provide the communicated information to a management system.

A door closer system having a door closer that includes at least one sensor configured to sense an operating characteristic or condition relating to the door closer including a position or speed of displacement of at least a portion of the door closer or an associated entryway device. The sensor(s) can also provide information relating to the performance or condition of one or more components of the door closer, such as the operation of a backcheck mechanism, as well as tracking the number of door cycles. Information obtained by the sensor(s) of the door closer system can be communicated to a lockset device of an entryway control system. The lockset device can be configured to communicate information received from the door closer system to an access control system, which can in turn provide the communicated information to a management system.

A motor vehicle door includes an arrester device having a magneto-rheological fluid for holding the motor vehicle door in position, and a coil for solidifying the magneto-rheological fluid that is disposed adjacent to a liquid-tight interior space, with the interior space containing one or more components which can be moved relative to other components in the interior space. A relative movement between these components is slowed down by solidifying the magneto-rheological fluid and the slowing down of the relative movement causes the motor vehicle door to be held in position. The coil is part of a switchable hard magnet which is selected such that a sedimentation-stable, magneto-rheological fluid is obtained. The motor vehicle door may thus be reliably held in a freely selectable position.

A motor vehicle door includes an arrester device having a magneto-rheological fluid for holding the motor vehicle door in position, and a coil for solidifying the magneto-rheological fluid that is disposed adjacent to a liquid-tight interior space, with the interior space containing one or more components which can be moved relative to other components in the interior space. A relative movement between these components is slowed down by solidifying the magneto-rheological fluid and the slowing down of the relative movement causes the motor vehicle door to be held in position. The coil is part of a switchable hard magnet which is selected such that a sedimentation-stable, magneto-rheological fluid is obtained. The motor vehicle door may thus be reliably held in a freely selectable position.