A tamper-detection device and system are disclosed. The tamper-detection device includes one or more components which enable the tamper-detection device to detect a state change, even in the absence of a power supply. A capacitor is provided in the tamper-detection device that, when shorted, discharges and induces a state change at a microcontroller of the tamper-detection device.

A door lock uses a mobile device as an input interface. The door lock includes a latch device mounted to a door, an outer operating device mounted to an outer face of the door, and an inner operating device mounted to an inner face of the door. The outer operating device includes a contact-type connection interface for contact-type connection with the mobile device. After the mobile device is in electrical connection with the outer operating device, an input device of the mobile device is used to input a to-be-identified identification information to the door lock, and the door lock identifies whether the to-be-identified identification information matches authenticated identification information for subsequent unlocking operation or remaining in a locked state.

A method for measuring energy harvested from at least one energy source for use in an access control system, comprising providing an access control device adapted to be at least partially powered by energy harvested from at least one energy source; providing at least one sensor receiving energy from the at least one energy source; providing an energy harvesting manager coupled to the at least one sensor, wherein the energy harvesting manager manages the amount of energy received by the at least one sensor; providing a capacitive storage device coupled to the energy harvesting manager, the capacitive storage device for storing energy harvested from the at least one sensor; charging the capacitive storage device to a voltage high threshold, V-HTH; applying a reference load to the capacitive storage device until the capacitive storage device discharges to a predetermined voltage value, Vo/e, the reference load having a predetermined resistance value; determining a time constant, the time constant defined as the length of time required for the capacitive storage device to discharge to the predetermined voltage value, Vo/e; and determining an exact or near exact capacitance of the capacitive storage device by comparing the time constant to the reference load predetermined value, by the expression: C=RC/RL, where C=capacitance (in farads), RC=time constant (in seconds), and RL=reference load resistance (in ohms).

In one embodiment, an electronically controlled hatch system for safe ingress, egress, hazard detection, and methods thereof are provided to reduce or eliminate hazards to personnel, including protection of people above and below a scuttle hatch, access port, skylight or elevated deck. Said hatch system reduces the risk of falls while ascending or descending a ladder through an access port. In certain embodiments, severe weather, hazard, security, and other safety information are detected and transmitted to a central control unit for processing and regulating the opening and closing of a hatch covering the access port and/or raising and lowering a safety railing system based on said information and/or user input. Said hatch system may include an actuator and guides for automatically locking/unlocking and opening/closing a hatch, an actuator and guides for automatically raising/lowering a railing system, safety monitoring detectors/apparatuses, and a centralized controller.

An intelligent door lock system is coupled to a door at a dwelling. A sensor is at the dwelling. The sensor is coupled to a drive shaft of a lock device to assist in locking and unlocking a lock of a lock device at the door. The lock device is coupled to the sensor and includes a bolt. An engine, an energy source and a memory are coupled together. A camera is coupled to or part of the intelligent door lock system. The camera is configured to define a safe zone in the dwelling in which an occupant, and a non dwelling occupant third person is allowed into the dwelling.

An intelligent door lock system is coupled to a door at a dwelling. A sensor is at the dwelling. The sensor being is coupled to a drive shaft of a lock device to assist in locking and unlocking a lock of a lock device at a door. The lock device is coupled to the sensor and includes a bolt. An engine, an energy source and a memory are coupled together. A camera is coupled to the intelligent door lock system with a wide field of view.

An illustrative access control system includes a locking assembly operable in locked and unlocked states, and a drive assembly operable to actuate the locking assembly. The drive assembly includes an electromechanical actuator, and energy storage device, and a control system. The electromechanical actuator is operable, upon receiving power, to transition the locking assembly between the locked state and the unlocked state. The energy storage device is electrically coupled to the electromechanical actuator, and configured to store electrical power from the power supply when the drive assembly is coupled to the power supply. The control system is configured to couple the drive assembly to the power supply in response to a first condition, and to thereafter transmit energy only from the energy storage device to power the electromechanical actuator, based at least in part upon a level of energy stored in the energy storage device.

A sensor system to reliably alert and inform a user of the status of a window, in particular, a sensor system which reliably informs the user if the window is both in a closed position and also that the locking mechanism is in the locked configuration. There are thereby provided two independent sensor systems within the casement window handle assembly which are arranged to verify that the window handle is in the locked configuration and also that the window sash is in the closed position relative to the window frame. The casement window handle assembly comprises a first sensor for indicating the position of the window handle and this comprises a first sensor component mounted to the pivotal/movable handle and a second component fixed within the mounting base.

A door lock includes a latch device and inner and outer operating devices operatively connected to the latch device. The inner operating device includes a control module and a first battery module electrically connected to the control module and supplying electricity for operation of the door lock. A detecting module is electrically connected between the first battery module and the control module. The outer operating device includes a first electric connecting device electrically connected to the detecting module and an unlocking information input module electrically connected to the control module. When the remaining electricity of the first battery module detected by the detecting module is lower than a preset alarm value and a second electric connecting device of a mobile device is in electrical connection with the first electric connecting device, the second battery module of the mobile device supplies electricity to the door lock for operation.

A security tag including: a housing and circuitry which detects a locked state, the circuitry configured to execute a signal transfer function responsive to interchanging a pin and a lanyard in the circuitry, and/or the housing including a replaceable battery compartment locked by inserting either the pin or the lanyard into a lock mechanism which differently secures the pin and the lanyard; and an alarm, in communication with the circuitry, triggered by an undisarmed breach of the locked state.