Provided are an acoustic sensor and a home appliance system comprising the same. The acoustic sensor comprises a communication unit, a microphone to collect an acoustic signal, a memory to store a failure acoustic signal of a home appliance, and a processor, wherein in response to the acoustic signal, collected by the microphone, corresponding to the failure acoustic signal of the home appliance, the processor transmits the collected acoustic signal, or data corresponding to the collected acoustic signal, to an external server or a terminal. Accordingly, failure of the home appliance may be easily diagnosed.

In a monitoring apparatus, an optical sensor senses objects present in a sensing area, and moving speeds and moving directions of the objects are calculated based on changes with time in positional information of the sensed objects. An object which meets a predetermined moving condition is determined as a moving object. Hence an entrance of the moving object into the sensing area can be monitored. In this apparatus, by a determining section, it is determined whether or not an object is sensed in an area (after-passage sensing area) which is set to include positions adjacent to positions through which the sensed moving object has passed. When the object has been sensed in the area, by the determining section, it is further determined whether or not the object has remained for a predetermined determination period of time or more. This determined result is outputted by an outputting section.

In a monitoring apparatus, an optical sensor senses objects present in a sensing area, and moving speeds and moving directions of the objects are calculated based on changes with time in positional information of the sensed objects. An object which meets a predetermined moving condition is determined as a moving object. Hence an entrance of the moving object into the sensing area can be monitored. In this apparatus, by a determining section, it is determined whether or not an object is sensed in an area (after-passage sensing area) which is set to include positions adjacent to positions through which the sensed moving object has passed. When the object has been sensed in the area, by the determining section, it is further determined whether or not the object has remained for a predetermined determination period of time or more. This determined result is outputted by an outputting section.

Monitoring a premises may comprise receiving signals from a plurality of devices. One or more spatially static devices of the plurality of devices may be determined based on strengths of the received signals. A user activity pattern may be determined based on changes in strengths of signals received from the spatially static devices. Abnormal user activity may be determined based on the user activity pattern and a strength of at least one signal received from at least one of the spatially static devices.

Monitoring system includes: a light projecting and receiving unit including an emitting section to emit a light flux, a scanning section to make the light flux scan within a monitoring space, and a light receiving section to receive a light flux reflected from an object within the monitoring space; a processing section to measure a distance to the object by processing signals from the light projecting and receiving unit and to output a measurement point marker group provided with three-dimensional distance information for each measurement point; a user interface that sets a monitoring region in a virtual space by an operation of a user; and a display device that, when the monitoring region has been set via the user interface, displays the set monitoring region together with the measurement point marker group, wherein the processing section outputs an alarm signal when an object invades within the monitoring region during monitoring.

Monitoring system includes: a light projecting and receiving unit including an emitting section to emit a light flux, a scanning section to make the light flux scan within a monitoring space, and a light receiving section to receive a light flux reflected from an object within the monitoring space; a processing section to measure a distance to the object by processing signals from the light projecting and receiving unit and to output a measurement point marker group provided with three-dimensional distance information for each measurement point; a user interface that sets a monitoring region in a virtual space by an operation of a user; and a display device that, when the monitoring region has been set via the user interface, displays the set monitoring region together with the measurement point marker group, wherein the processing section outputs an alarm signal when an object invades within the monitoring region during monitoring.

A computer-implemented event statistic generation for intrusion detection comprises processing a plurality of return signals from a coherent optical time-domain reflectometer into time-domain signals for each of a plurality of sensor bins, the plurality of return signals corresponding to a plurality of stimulation pulses injected into an optical sensor fiber during a time period. For each sensor bin, transforming the respective time-domain signal into a corresponding frequency-domain signal, calculating, from the respective frequency-domain signal, a first signal power area of a first frequency band expected to contain system noise and a second signal power area of a second frequency band expected to contain any energy related to at least a first event; and generating an event statistic proportional to the ratio of the second signal power area to the first signal power area at least in part by dividing the second signal power area by the first signal power area.

A computer-implemented event statistic generation for intrusion detection comprises processing a plurality of return signals from a coherent optical time-domain reflectometer into time-domain signals for each of a plurality of sensor bins, the plurality of return signals corresponding to a plurality of stimulation pulses injected into an optical sensor fiber during a time period. For each sensor bin, transforming the respective time-domain signal into a corresponding frequency-domain signal, calculating, from the respective frequency-domain signal, a first signal power area of a first frequency band expected to contain system noise and a second signal power area of a second frequency band expected to contain any energy related to at least a first event; and generating an event statistic proportional to the ratio of the second signal power area to the first signal power area at least in part by dividing the second signal power area by the first signal power area.

An intrusion detection system for a vehicle includes a radar sensor, a calculator, and an alarm system adapted to generate an alarm, the radar sensor being adapted to detect the presence of a body within the vehicle, the calculator being adapted to categorize each detected body as either a “human” category or an “other” category and to trigger the alarm system only when at least one of the detected body(ies) is categorized as “human”. Also included is an associated vehicle and method.

An exemplary method and system is disclosed that facilitates a readily-re-deployable and self-enclosed geofencing and proximity-based intrusion sensing and alerting system in a roadway or construction work zone. The sensing and alerting system is configured in the form factor of a safety cone, barricade or drum to sense and uses acoustic-echoes or LiDAR-based sensing to detect intruders that are in proximity to the sensing and alerting system to generate a siren or loud audible alert, as well as flashing lights, to warn workers of such intrusion.