Optical data transceiver is used to illuminate a secured space with an optical data signal which has been modulated to contain a first data sequence. One or more retroreflected optical data signals are received at the optical data transceiver from reflector elements disposed in the secured space. The retroreflected optical data signals are authenticated and a security event notification is selectively communicated to an enterprise security management controller if a variation occurs in regard to at least one retroreflected optical beam condition. The variation can involve a disruption of the optical beam and/or a displacement of the optical beam.

Provided is a safety scanner that enables simplification of an operation of checking an operating state. The safety scanner includes a scan image generation section that generates a scan image that includes a plurality of sets of distance measurement information obtained by performing scanning with a detection light emitted by an emitter, the plurality of sets of distance measurement information being represented as a plurality of distance measurement positions on a scanning plane of the detection light, and a monitoring image display that displays the scan image on a screen.

Provided is a safety scanner capable of easily grasping the correspondence relationship between a distance measurement position on a scanning plane and a real space. The safety scanner includes a distance measurement section that obtains distance measurement information corresponding to a distance optically sensed and a scanning angle of a detection light, an intrusion sensing section that senses an intruder within the protection area on the basis of the distance measurement information and a area designation information, a marker identification section that identifies a marker movably disposed within the detection area, and the distance measurement information of the marker as an area generation information for determining the protection area.

Provided is a safety scanner capable of facilitating an analysis of a sensing factor at the time of sensing an intruder. The safety scanner includes a monitoring image generation section that generates a monitoring image for monitoring a protection area, a sensing history storage section that stores a position and a sensing time of a sensed intruder and the monitoring image corresponding to the sensing time or a plurality of distance measurement information items obtained within a scanning period corresponding to the sensing time in association with each other as a sensing history, and a sensing history transmission section that transmits the sensing history in accordance with a history request from an external device.

Provided is a safety scanner capable of obtaining uniform optical performance for a view angle of 180° or more. The safety scanner includes an optical rotator that emits detection light from a light source to a detection area and causes the detection light to perform scanning in a circumferential direction, a light receiving element that receives reflected light from an object within the detection area through the optical rotator, a casing that houses the light receiving element. The casing includes a canopy part, a bottom part facing the canopy part, and a coupling part that couples a rear end of the canopy part to a rear end of the bottom part. The protective cover includes a window formed in a circular arc shape, corresponding to an optical path of the detection light and the reflected light, having a central angle larger than 180° with respect to the rotation axis.

Provided is an optical safety system that enables simplification of an editing operation for area designation information. A safety scanner includes an intrusion sensing section that determines the presence or absence of an intruder into a protection area. The setting support device includes a pseudo determination information generation section that determines a presence or absence of an intruder into a protection area on the basis of an area designation information before being transmitted to the safety scanner and a distance measurement information received from the safety scanner and generates a pseudo determination information indicating the determination result.

A computer-implemented event statistic generation method 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, the method comprises 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, calculating, from the respective frequency-domain signal, 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 method 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, the method comprises 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, calculating, from the respective frequency-domain signal, 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.

The laser scanning sensor includes a laser distance meter, a scanning mechanism, a distance data acquisition unit, a distance data complementation unit, a human body judgment unit, an alarm output control unit, and a memory. For each measurement direction when a piece of distance information corresponds to an unintended object located at a shorter distance than an object to be originally detected and when complementation of the piece of distance information is possible based on a piece of distance information in an adjacent measurement direction or at a previous measurement cycle, the distance data complementation unit replaces the piece of distance information in the measurement direction corresponding to the unintended object with an interpolated value based on the piece of distance information acquired in the adjacent measurement direction or with an interpolated value based on the piece of distance information acquired in the measurement direction at a previous measurement cycle.

The laser scanning sensor includes a laser distance meter, a scanning mechanism, a distance data acquisition unit, a distance data complementation unit, a human body judgment unit, an alarm output control unit, and a memory. For each measurement direction when a piece of distance information corresponds to an unintended object located at a shorter distance than an object to be originally detected and when complementation of the piece of distance information is possible based on a piece of distance information in an adjacent measurement direction or at a previous measurement cycle, the distance data complementation unit replaces the piece of distance information in the measurement direction corresponding to the unintended object with an interpolated value based on the piece of distance information acquired in the adjacent measurement direction or with an interpolated value based on the piece of distance information acquired in the measurement direction at a previous measurement cycle.