An alarm screen comprises a frame comprising a laser sensor, a processing unit, and a wireless transmitter embedded in a hollow interior. The frame comprises an opening for the laser sensor to project a laser beam outside of the alarm screen. The laser sensor projects the beam through the opening, makes a set of one or more measurements of a distance between the laser sensor and an object in a path of the laser beam, and sends the set of measurements to the processing unit. The processing unit is configured to compare the distance measurements received from the laser sensor with a threshold distance detect, and send one or more signals to the wireless transmitter when at least one of the distance measurements received from the laser sensor exceeds the threshold. The wireless transmitter is configured to receive signals from the processing unit and wirelessly transmit the signals.

The presently disclosed method and system includes a network of computer devices, sensors, and actuators operating in concert with application software to actively detect, identify, and localize threats and generate real-time countermeasures designed to delay and/or mitigate damage that may be caused by the threats. Application software, in the form of automated reasoning and logic control, initiates preparatory and countermeasure sequences automatically, which may be used by users or automatically executed by the system to at least delay an attack to a physical asset/area by adversaries with use of non-lethal actuators. Learned scenarios are generated and continuously adapted via feedback loops and decision rules to provide preparatory and countermeasure sequences that maximize results with minimal expenditure of assets.

A security sensor is provided which has a container body and a signal acquisition and processing module housed in the container body. The signal acquisition and processing module has a piezoelectric transducer configured to convert a mechanical stress to which the piezoelectric transducer is subjected into a first electrical signal, an accelerometric transducer configured to convert an acceleration to which the accelerometric transducer is subjected into a second electrical signal, and processing unit operatively connected to the piezoelectric transducer and to the accelerometric transducer for receiving the first and second electrical signals. The accelerometric transducer is a MEMS accelerometric transducer.

Devices, systems, and methods for intrusion-detection for use with a fence comprising a gate-section have been developed and are herein described. The present disclosure relates to and describes a gate-connector system for an intrusion-detecting-fence system. A intrusion-detecting cable is run from a fence to a gate section. On each side of the gate section, the cable is terminated into a junction-box and connected to a shorter cable-plug assembly that terminates in a weatherproof, pull-apart connector. The cable-plug assemblies from each side of the gate section are connected together to complete a circuit. With the intrusion-detecting cable extending onto the gate, intrusion-protection is provided on the gate section as well as on the fence. A gate at the gate section can easily be opened by unplugging the connectors.

The present invention relates to a metal protective net, including: multiple steel wires arranged in parallel; multiple metal connecting sheets arranged in parallel, where the metal connecting sheets and the steel wires are arranged to intersect with each other at multiple intersections without being connected; insulating members which are provided between the steel wires and the metal connecting sheets and located at the intersections, and fixedly connected therewith; and connecting terminals, where both ends of each steel wire each are connected with one connecting terminal, and both ends of each metal connecting sheet each are connected with one connecting terminal; and a monitoring device electrically connected with the connecting terminals. The steel wires and the metal sheets, which form the metal protective net, are not electrically conductive with each other, forming many individual loops. If the metal net is broken, an alarm can be sent by the monitoring device.

One or more techniques and/or systems are disclosed for alerting workers in a work zone of a potential intrusion by a vehicle. The example system can comprise a detection unit operable to mount to a work zone boundary marker. The detection unit monitors the work zone for intrusion by moving objects using the Doppler Effect. The detection unit can transmit an alarm signal to one or more personnel alerters, such as worn by workers. The personnel alerters can receive the alarm signal and activate an alert, such as an audible, visual, or other sensory alert. In this way, an alert is provided to personnel working in an established work zone that a moving object, such as a vehicle, has penetrated the work zone perimeter. This type of alert may provide the personnel the vital seconds needed to move to safety.

A submergible marine barrier protecting marine installations in a protected zone against intrusion and providing a containment barrier against spread of floating spills or bodies. The body of the barrier is supported above water by a main body thus preventing intrusion and containing floating spillage. A weight in main body keeps the barrier upright, and a rigid floatation chamber in the main body keeps it afloat when full of air. A skimming pipe collects floating pollution. Flooding the floatation chambers causes the barrier to submerge allowing access to the protected zone and protecting the barrier from storms. Body, main body, and floatation chambers are made of extruded material with flotation properties (e.g. plastic pipes). Floatation chambers are connected by air hoses and have air venting tubes at their bottom. Sensors detect approaching intruders and pollution, while spikes, barbed-wire and diver-net or any known barrier are used to stop them.

A system for monitoring the integrity of a plurality of ground conductors has a plurality of monitors, with a different monitor associated with each ground conductor. Each monitor includes a voltage sensor which monitors voltage on a closed circuit of the monitor. Upon the voltage sensor sensing an unexpected voltage, a transmitter of the monitor issues an “alarm” signal, which may be wireless (e.g., being sent using LoRaWAN protocol). The transmitter may issue other signals, including a periodic “heartbeat” signal to confirm continued operation of the monitor, and a “movement” signal to indicate movement of the monitor. The monitor may be GPS-enabled, in which case each signal may include the GPS coordinates of the monitor. The signals issued by the transmitter may ultimately be analyzed by an operator via a user interface platform, which may simultaneously display information regarding two or more of the plurality of monitors.

The present invention relates to a suicide preventing fence, and, according to an embodiment of the present invention, the suicide preventing fence comprises: a plurality of pole parts provided standing upright from the ground surface at predetermined intervals; a plurality of linking parts which are formed in the shape of pipes and horizontally link the spaces between the pole parts; rotating bodies which are formed with an internally hollow abacus bead shape and are provided on the outer circumferential surfaces of the linking parts; bearings which are provided on the outer circumferential surfaces of the linking parts, positioned in the centers on the insides of the rotating bodies; and rotating bolts which are provided on the outer circumferential surfaces of the linking parts and are inserted in through-passing regions on both side surfaces of the rotating bodies so as to rotate together with the rotating bodies. Consequently, the invention makes it possible to prevent suicide since the rotating bodies are provided on the fence and cannot be easily grasped by anyone attempting to pass over same.

One or more techniques and/or systems are disclosed for alerting workers in a work zone of a potential intrusion by a vehicle. The example system can comprise a detection unit operable to mount to a work zone boundary marker. The detection unit can monitor the work zone for intrusion by moving objects, such as by using the Doppler Effect. The detection unit can transmit an alarm signal to one or more personnel alerters, such as worn by workers. The personnel alerters can receive the alarm signal and activate an alert, such as an audible, visual, or other sensory alert. In this way, an alert is provided to personnel working in an established work zone that a moving object, such as a vehicle, has penetrated the work zone perimeter. This type of alert may provide the personnel the vital seconds needed to move to safety.