JP2012058880A - Monitoring system with position detection unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring system with a position detection unit capable of detecting a passage position of an intruder in a simple configuration at low cost.SOLUTION: In a monitoring system for detecting intrusion by interruption of an alert line S and monitoring an intruder H, transmitters T and receivers R of an opposed-type alert line interruption detection sensor 2 for setting the alert lines S composed of detection waves in an alert area A are placed so as to face each other and form the alert lines S including at least two detection waves S1 and S2 having transmission paths substantially horizontal when viewed from the side and mutually oblique when viewed from above. The monitoring system includes a position detection unit 7 for detecting a passage position of the intruder H on the basis of the interruption of the oblique alert lines S by the intruder H.

Description

  The present invention relates to a monitoring device with a position detection unit that detects the position of an intruder who has entered a warning area and monitors the intruder.

  With this type of monitoring device, an alarm is issued when an intruder who has illegally entered the alert area is detected by the opposing warning line cutoff detection sensor, etc., and the surveillance camera is turned to the intruder's passing position to image the intruder. And monitor intruders.

  As the counter-type warning line cutoff detection sensor, for example, a cutoff type sensor that detects a change in the amount of light due to cutoff of a detection wave that has been projected and received, on both ends of the longitudinal direction (direction perpendicular to the intrusion direction) of the warning area, It is known that a transmitter and a receiver having optical axes parallel to each other in the longitudinal direction in a substantially horizontal plane are provided so as to face each other, and the intruder's passing direction and size are discriminated by blocking the detection wave of the intruder ( For example, Patent Document 1).

JP-A-10-334351

  However, the conventional counter-type warning line cut-off detection sensor simply determines the intruder's passing direction and size, and can detect the intruder's passing position and direct the surveillance camera based on it. There wasn't. On the other hand, in order to detect the position of an object, it is conceivable to divide a warning area and arrange an opposing warning line cutoff detection sensor in each area. The cost will be increased due to the cost required for the installation.

  Further, when a single surveillance camera is installed in a plurality of warning areas to reduce the cost, it is necessary that the position of the intruder can be easily detected in a wide area by the plurality of warning areas.

  An object of the present invention is to provide a monitoring device with a position detection unit that solves the above-described problems and can easily detect the position of an intruder with a simple configuration and low cost.

In order to achieve the above object, the monitoring device with a position detection unit according to the present invention is configured such that a transmitter and a receiver of a counter-type warning line cutoff detection sensor that sets a warning line including a detection wave in a warning area are detected waves in a side view. Are arranged opposite to each other so as to form a warning line including at least two detection waves having a substantially horizontal transmission path and having transmission paths that are oblique to each other in plan view. A monitoring device that detects and monitors an intruder, and includes a position detection unit that detects a passing position of the intruder based on the interception of the diagonal warning line by the intruder.
Here, the transmission paths that are oblique to each other in plan view refer to a state in which the detection waves (warning lines) are not parallel to each other in plan view.

  According to this configuration, at least two diagonal warning lines are blocked by an intruder, that is, based on the time difference of the warning line cutoff that changes according to the intrusion position of the warning area because the warning line is diagonal. Since the passing position of the intruder is detected, the passing position of the intruder can be easily detected with a simple configuration and low cost.

  Preferably, the opposed warning line cutoff detection sensor has two sets of transmitters and receivers installed at both ends in the longitudinal direction of the warning area, and one end of each of the sets of transmitters and receivers is connected to the one end of the warning area. Two diagonal warning lines are formed with the other end of each set arranged close to each other at the other end, spaced apart in a direction perpendicular to the longitudinal direction. Therefore, by detecting the time difference between the interception of the two diagonal warning lines by the intruder, the passing position of the intruder can be easily detected with a simple configuration and low cost.

  Preferably, in the opposed warning line cutoff detection sensor, four sets of transmitters and receivers are installed at both ends in the longitudinal direction of the warning area, and each pair of transmitters or receivers is provided at the both ends of the warning area. Arranged at each end in a direction orthogonal to the direction, the four warning lines have a substantially horizontal transmission line in a side view, and the two warning lines are parallel to the longitudinal direction in a plan view. It has a road and is formed so as to have an oblique transmission line so that the other two warning lines cross each other at the approximate center of the warning area in plan view. Therefore, the passage position of the intruder can be detected more accurately and quickly by detecting the time difference between the interruption of the two parallel warning lines and the two oblique warning lines.

  Preferably, a monitoring camera for imaging a warning area is provided, and the monitoring camera is set to be able to be directed to the detected passing position of the intruder. Moreover, based on the detection result by the position detection unit, a passing position information signal for turning the surveillance camera to the passing position of the intruder is output. Therefore, the intruder can be easily captured by video based on the position detection of the intruder.

  Preferably, a single surveillance camera is provided in the plurality of alert areas. Therefore, monitoring based on the position detection of an intruder can be performed with a single monitoring camera, and the cost of the apparatus can be reduced.

  In the present invention, since at least two warning lines are diagonal, the passing position of the intruder is detected based on the time difference of the warning line interruption that changes according to the intrusion position of the warning area. The passing position of the intruder can be easily detected at low cost.

It is a block diagram which shows the monitoring apparatus with a position detection part which concerns on 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the monitoring apparatus of FIG. It is a block diagram which shows the monitoring apparatus with a position detection part of 2nd Embodiment. It is a block diagram which shows the monitoring apparatus with a position detection part of 3rd Embodiment. It is a flowchart which shows operation | movement of an example of the monitoring apparatus with a position detection part of FIG. It is a flowchart which shows operation | movement of the other example of the monitoring apparatus with a position detection part of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram illustrating a monitoring device 1 with a position detection unit according to a first embodiment of the present invention. The monitoring device 1 is provided with a pair of sensor installation locations 4 extending in the y direction, for example, provided at both ends of the longitudinal direction of the elongated warning area (section) A in a plan view, that is, in the direction x orthogonal to the intrusion (entry) direction y. (4A, 4B) arranged opposite to each other, consisting of two sets of transmitter T1, receiver R1, transmitter T2, and receiver R2 that project and receive two detection waves S1 and S2 of a projection beam such as infrared rays. Type surveillance line blocking detection sensor 2 and surveillance camera 3 which is set so as to be able to be directed to the passing position of intruder (human body) H, and detects intruder H and detects the passing position. And a control unit 5 that performs control. The intrusion detection unit U is configured by the opposed warning line cutoff detection sensor 2 and the control unit 5.

  In the monitoring device 1, the two transmitters T1 and T2 of the opposed warning line cutoff detection sensor 2 are close to each other in the y-direction substantially central part 4A0 in the rightmost sensor installation location 4A, and the y in the leftmost sensor installation location 4B. The receivers R1 and R2 that receive the two detection waves from the transmitters T1 and T2, respectively, are arranged so as to be spaced apart from each other in the upper end (back) portion 4B1 and the lower end (front) portion 4B2. These two detection waves S1 and S2 form a warning line S. The two warning lines S1 and S2 have a substantially horizontal transmission line in a side view, and between a substantially central portion 4A0 of the sensor installation location 4A and both end portions 4B1 and 4B2 of the sensor installation location 4B in a plan view. It has a transmission path that forms an angle θa with respect to the y direction (angle π−θa with respect to the x direction) and an angle θb (angle π−θb with respect to the x direction). In this example, θa = θb = θ. The substantially horizontal transmission line in the side view includes a slightly inclined transmission line, and it is sufficient that the detection wave exists within a range where the human body H can be detected.

  It should be noted that the receivers R1 and R2 are located close to each other at a substantially central portion 4A0 of the sensor installation location 4A, and the transmitters T1 and T2 are separated from the upper end (back) portion 4B1 and the lower end (front) portion 4B2 of the sensor installation location 4B. You may arrange | position so that it may mutually oppose, and you may arrange | position one set of transmitters and receivers mutually. Alternatively, one of the transmitter and the receiver may be spaced apart from the upper and lower ends of the sensor installation location 4A, and the other may be disposed close to the approximate center of the sensor installation location 4B.

  The control unit 5 controls the entire apparatus, and includes an intrusion detection unit 6, a position detection unit 7, an alarm output unit 8, a camera operation output unit 9, and a memory 10. The intrusion detection unit 6 emits light from the transmitter T and is received by the receiver R when the detected light level changes below the predetermined reference level due to change in the amount of light due to interruption of the warning line S (transmission path) due to intrusion. Intruder H is detected.

  The position detection unit 7 detects the passage position of the intruder H based on the interception of the diagonal warning line S by the intruder H that has been detected as intrusion. When the alarm output unit 8 detects the passage of the intruder H, the alarm output unit 8 outputs a detection signal for issuing a warning by reporting to the security system or by voice or lighting display. When the intruder H's passing position is detected, the camera operation output unit 9 activates the surveillance camera 3 and operates its horizontal and vertical angles with a remote control to detect the intruder H's detected position. A passing position information signal for automatically turning to the passing position is output. The memory 10 stores various data such as the angle of the warning line S and the detection position of the intruder H.

Hereinafter, the position detector 7 will be described in detail. First, the angle θa = θb = θ () formed by the oblique warning lines S1 and S2 with respect to the y direction from the warning distance L (m) in the x direction of the warning area A and the width W (m) in the y direction. °) is obtained in advance. The warning distance L is selected by a setting switch or the like when the apparatus is installed, but may be obtained by calculation based on angle information θa and θb (°) from the angle sensor or the like when adjusting the optical axes of the transmitter and the receiver.
θ (°) = tan−1 (L / (W / 2))

The moving speed v (m / sec) of the intruder H for calculating the passing position of the intruder H is detected when the warning lines S1 and S2 are interrupted. For example, the warning received by the receiver R1 Infrared light receiving width wb (m) and intruder H thickness (average human body thickness) wh (m) set on the transmission line of line S1, and blocking time ts (sec) on intruder H alert line S1 Based on the above, the moving speed v (m / sec) of the intruder H is calculated.
v (m / sec) = (wh (m) -wb (m)) / ts (sec)

Then, from the time t (sec) from the interruption of the warning line S1 to the interruption of the warning line S2 and the moving speed v (m / sec), the distance Y (between the interrupted warning line S1 and the warning line S2 ( m) is calculated. The time t is the time difference between the diagonal warning lines S1 and S2, and the distance Y (m) between the diagonal warning lines S1 and S2 corresponds to the y-direction position in the warning area A. The detection position of H in the y direction is specified.
Y (m) = v (m / sec) × t (sec)

From the distance Y (m) and the angle θ (°), the distance X (m) in the x direction from the side edge of the sensor installation location 4A at the right end of the alert area A to the intruder H position is calculated.
X (m) = (Y (m) / 2) × tan θ (°)
Note that the distance in the x direction from the side edge of the sensor installation location 4B at the left end of the alert area A to the intruder H position is L−X (m).

FIG. 2 is a flowchart showing the operation of the monitoring device 1.
First, the angle θ (°) with respect to the y direction of the warning lines S1 and S2 obtained from the warning distance L (m) in the x direction and the width W (m) in the y direction is stored in the memory 10 in advance (step). S1). Next, when the intruder H enters the alert area A and interrupts the alert line S1 in the y direction, the moving speed v (m / sec) of the intruder H is calculated based on the intercept time (step). S2).

  As the intruder H moves in the y direction, the intruder H is cut off from the time t (sec) from the start of the warning line S1 to the start of the warning line S2 and the moving speed v (m / sec) of the intruder H. A distance Y (m) in the y direction between the warning line S1 and the warning line S2 is calculated (step S3). Then, a distance X (m) in the x direction from the side edge of the sensor installation location 4A in the alert area A to the intruder H position is calculated from the distance Y (m) and the angle θ (°) (step S4). . Finally, an alarm based on the position detection in the x and y directions based on the distances X and Y (m) of the intruder H is output, and the detected positions in the x and y directions are output (step S5).

  As a result, since the warning lines S1 and S2 are diagonal, the passing position of the intruder H is detected based on the time difference between the interruption of the warning lines S1 and S2 that changes according to the intrusion position of the warning area A. The passing position of the intruder H can be easily detected with a simple configuration and low cost.

  FIG. 3 is a configuration diagram illustrating a monitoring device 1A with a position detection unit according to the second embodiment. In the first embodiment, the opposing warning line cutoff detection sensor 2 arranges two sets of transmitters T1 and T2 and receivers R1 and R2 that project and receive two detection waves S1 and S2 so as to face each other. However, in the second embodiment, the opposing warning line cutoff detection sensor 2 includes a single transmitter T that projects light by expanding the transmission path of the detection wave, and two receivers R1 that receive the detection wave S, By arranging R2 so as to face each other, warning lines S1 and S2 are substantially configured.

In this case, the angle θ (°) formed by the diagonal warning lines S1 and S2 is determined from the warning distance L (m) in the x direction of the warning area A and the width W (m) in the y direction.
θ (°) = 2 · tan−1 ((W / 2) / L)
Similarly to the first embodiment, the right edge of the warning area A is calculated after the moving speed v (m / sec) of the intruder and the distance Y (m) between the blocked warning line S1 and the warning line S2 are calculated. The distance X (m) in the x direction from the side edge of the sensor installation location 4A to the intruder H position is calculated by the following equation. Other configurations are the same as those of the first embodiment.
X (m) = (Y (m) / 2) / tan (θ / 2) (°)

  In the second embodiment, the spread of the transmission path of the infrared beam from a single transmitter T to the two receivers R1 and R2 is used. For calculating the moving speed v (m / sec) of the intruder H, Of the infrared beam that has been projected from a single transmitter T and whose transmission path has been expanded, the infrared light receiving width wb (m) of the warning lines S1 and S2 that are preset light receiving widths of the receivers R1 and R2 are used.

  As a result, a single transmitter T and two receivers R1 and R2 are arranged opposite to each other, and by detecting the time difference between the interception lines S1 and S2 by the intruder H, a simple configuration and low The passing position of the intruder H can be easily detected at a cost.

  FIG. 4 is a configuration diagram illustrating a monitoring device 1B with a position detection unit according to the third embodiment. Unlike the first embodiment, the third embodiment is different from the first embodiment in that the opposing warning line cutoff detection sensor 2 constitutes four warning lines S1 to S4, and sets and transmits four sets of transmitters T1 to T4 and a receiver R1. To R4 are installed opposite to each other in a pair of sensor installation locations 4 (4A, 4B) provided at both ends in the x direction of the warning area A and extending in the y direction. Each set has its own set of transmitter or receiver.

  In the monitoring device 1B, the transmitter T1 is disposed at the upper end (back) portion 4B1 of the leftmost sensor installation location 4B, and the receiver R1 is disposed at the upper end (backward) portion 4A1 of the rightmost sensor installation location 4A. The transmitter T2 is disposed at the lower end (front side) 4A2 at the rightmost sensor installation location 4A, and the receiver R2 is disposed at the upper end (back) portion 4B1 at the leftmost sensor installation location 4B. Is arranged at the upper end (back) portion 4A1 at the rightmost sensor installation location 4A, and the receiver R3 is arranged at the lower end (front side) portion 4B2 at the leftmost sensor installation location 4B to project and receive light on the alert line S3, and the transmitter T4 is the leftmost sensor. The receiver R4 is connected to the lower end (front side) 4B2 at the installation location 4B. For projecting light to alert line S4 is arranged at the lower end (front) portion 4A2 of service location 4A. A warning line S is formed by these four warning lines S1 to S4.

  The warning line S includes four warning lines S1 to S4 having a substantially horizontal transmission line in a side view, two warning lines S1 and S4 having a transmission line parallel to the x direction in a plan view, and the like. Is an angle θc (in relation to the x direction) with respect to the y direction between the lower end (front side) 4A2 of the sensor installation location 4A and the upper end (back) portion 4B1 of the sensor installation location 4B in plan view. In other words, the other warning line S3 has an upper end (back) portion 4A1 of the sensor installation location 4A and a lower end (front side) of the sensor installation location 4B in plan view. The two warning lines S2 and S3 are substantially at the center of the warning area A with a transmission line that forms an angle θd with respect to the part 4B2 (angle π−θd with respect to the x direction) with respect to the y direction. Cross at AO. In this example, θc = θd = θ.

  Of the four sets of transmitters T1 to T4 and the receivers R1 to R4 of the opposing warning line cutoff detection sensor 2, one set or two or more sets of transmitters and receivers are switched to the left and right reversed positions. May be.

Hereinafter, the position detection unit 7 of the third embodiment will be described. First, the angle θc = θd = θ () formed by the oblique warning lines S2 and S3 with respect to the y direction from the warning distance L (m) in the x direction of the warning area A and the width W (m) in the y direction. °) is required.
θ (°) = tan−1 (L / W)

The moving speed v (m / sec) of the intruder H is detected when the warning line S1 is interrupted. As above,
v (m / sec) = (wh (m) -wb (m)) / ts (sec)

Then, from the time t1 (sec) from the start of the interruption of the warning line S1 to the start of the interruption of the warning line S2, and the moving speed v (m / sec), y between the interrupted warning line S1 and the warning line S2 A direction distance Y1 (m) is calculated.
Y1 (m) = v (m / sec) × t1 (sec)
Further, a distance Y2 (m) in the y direction between the interrupted alert line S2 and the alert line S3 is calculated from a time t2 (sec) from when the alert line S2 is interrupted to when the alert line S3 is interrupted.
Y2 (m) = v (m / sec) × t2 (sec)
Further, a distance Y3 (m) in the y direction between the interrupted alert line S3 and the alert line S4 is calculated from a time t3 (sec) from the commencement of the alert line S3 to the alert start of the alert line S4.
Y3 (m) = v (m / sec) × t3 (sec)
The times t1, t2, and t3 are the time differences of the interruptions in the warning lines including the diagonal warning lines S2 and S3, and the distances Y1, Y2, and Y3 (m) between the warning lines including the diagonal warning lines S2 and S3. Corresponds to the y-direction position in the alert area A, so that the detection position of the intruder H in the y-direction is specified.

The distances X1, X2 in the x direction from the side edge of the sensor installation location 4B at the left end of the warning area A to the intruder H position from the distances Y1, Y2, Y3 (m) in the y direction and the angle θ (°). , X3 (m) are respectively calculated.
X1 (m) = Y1 (m) × tan θ (°)
X2 (m) = (W (m) / 2) × tan θ (°) − (Y2 (m) / 2) × tan θ (°)
X3 (m) = Y3 (m) × tan θ (°)
The distances in the x direction from the x-direction center line (center position) of the alert area A to the intruder H position are L / 2-X1, L / 2-X2, and L / 2-X3 (m), respectively. .

  FIG. 5 is a flowchart showing an example of the operation of the monitoring device 1B according to the third embodiment. First, the angle θ (°) of the alert lines S2 and S3 obtained from the alert distance L (m) in the x direction and the width W (m) in the y direction is stored in the memory 10 in advance (step S11). Then, when the intruder H enters the alert area A and interrupts the alert line S1 in the y direction, the moving speed v (m / sec) of the intruder H is calculated based on the intercept time (step S12). ).

  Next, with the movement of the intruder H in the y direction, from the time t1 (sec) from the start of blocking the warning line S1 to the start of blocking the warning line S2, and the moving speed v (m / sec) of the intruder, A distance Y1 (m) between the blocked alert line S1 and the alert line S2 is calculated (step S13). At this time, similarly, the distance Y2 (m) between the interrupted alert line S2 and the alert line S3 from the time t2 (sec) from the commencement of the alert line S2 to the alert start of the alert line S3 is the alert line. From the time t3 (sec) from the start of blocking of S3 to the start of blocking of the warning line S4, the distance Y3 (m) between the blocked warning line S3 and the warning line S4 is calculated.

  Then, distances X1, X2, and X3 (m) in the x direction from the side edge of the sensor installation location 4A to the intruder H position are calculated from the distances Y1, Y2, and Y3 (m) and the angle θ (°). (Step S14). Finally, an alarm based on the position detection in the x and y directions based on the distances X and Y (m) of the intruder H is output, and the detected positions in the x and y directions are output (step S15).

  Thereby, the passage position of the intruder H is detected more accurately and quickly by detecting the time difference between the interruption of the two parallel warning lines S1 and S4 and the interruption of the two oblique warning lines S2 and S3. be able to.

  Moreover, since the warning lines S2 and S3 are crossed, the angle of the warning line is increased and the blocking time is increased, so that the resolution can be increased. In addition, when the intruder H enters and shuts off from the alert line S1 to S2 due to the intersection of the alert lines S2 and S3, the intruder H blocks from the alert line S1 to S3. Since the fact that the vehicle is passing the right side of the alert area A can be determined when the alert line S2 or S3 is interrupted, the approximate passing position of the intruder H can be detected before the intruder H is accurately detected. Further, immediately after the warning line S2 or S3 is interrupted, the surveillance camera 3 can be turned to the right or left side of the warning area A through which the intruder H passes, so that before the intruder H accurately detects the position. In addition, it is possible to quickly output a passing position information signal for directing the surveillance camera 3 to the approximate passing position of the intruder H.

Next, another example of the monitoring device 1B according to the third embodiment will be described. Unlike the case where the moving speed v (m / sec) of the intruder is detected when the warning line S1 is cut off, the other example is that the moving speed v (m / sec) of the intruder is set to the warning line S1. The time t (sec) from the start of shutting off the alert line S4 to the start of shutting off the alert line S1, or the time t1 (sec) from the start of shutting off the alert line S1 to the start of shutting off the alert line S2, the alert line S3 from the start of shutting off the alert line S2 The time t2 (sec) until the start of shutting off of the alarm line S3, and the total time t3 (sec) from the start of shutting down the alert line S3 to the start of shutting off the alert line S4, t (sec) = t1 + t2 + t3 (sec), It is obtained from the width W (m) in the y direction. Other configurations are the same as those of the monitoring apparatus 1B.
v (m / sec) = W (m) / t (sec)

  FIG. 6 is a flowchart showing the operation of another example of the monitoring apparatus 1B of the third embodiment. First, the angle θ (°) of the warning lines S2 and S3 obtained from the warning distance L (m) in the x direction and the width W (m) in the y direction is stored in the memory 10 in advance (step S21). Next, when the intruder H enters the alert area A and moves in the y direction, the time t (sec) from the start of shutting off the alert line S1 to the start of shutting off the alert line S4 or the start of shutting off the alert line S1. Time t1 (sec) until the warning line S2 starts to be cut off, time t2 (sec) from the start of the warning line S2 to the start of warning line S3, and the start of the warning line S3 from the start of interruption of the warning line S4 Until the time t3 (sec) is calculated (step S22).

  Next, the movement speed v (m / sec) of the intruder is the time t (sec) from the start of shutting off the alert line S1 to the start of shutting off the alert line S4, or the time for shutting off each alert line S1, S2, S3. It is calculated from the total time t (sec) of t1, t2, t3 (sec) and the width W (m) in the y direction of the alert area A (step S23). Next, the distance Y1 (m), the distance Y2 (m), and the distance Y3 (m) are calculated from the times t1, t2, and t3 (sec) and the moving speed v (m / sec) of the intruder H. (Step S24).

  Then, distances X1, X2, and X3 (m) in the x direction from the side edge of the sensor installation location 4A to the intruder H position are calculated from the distances Y1, Y2, and Y3 (m) and the angle θ (°). (Step S25). Finally, an alarm based on the position detection in the x and y directions based on the distances X and Y of the intruder H is output, and the detected positions in the x and y directions are output (step S26).

  In this other example, the moving speed v (m / sec) of the intruder H can be accurately obtained from the total time t (sec) and the width W (m). Since the position detection of the intruder H passes after the warning area A, it is mainly used for monitoring the intruder H after leaving the warning area A. Note that the movement speed v (m / sec) is calculated by using the calculation based on the total time t (sec) and the width W (m) and the calculation based on one interruption time of the warning line S in the third embodiment. May be acquired.

  In addition, in each said embodiment, although the opposing type | formula vigilance line interruption | blocking detection sensor 2 uses infrared rays as a detection wave, even if it uses the device which can be alerted in a line shape, such as a laser and a microwave. Good.

  In each of the above embodiments, a single warning area A is used. However, the present invention may be applied to a case where a plurality of warning areas are provided in the x direction with respect to a long warning distance in the x direction. A single camera 3 may be used. Thereby, cost reduction of an apparatus can be achieved.

  Further, the position detection accuracy may be improved by increasing the number of the warning lines S by increasing the number of the opposite warning line cutoff detection sensors 2. In this case, the opposing warning line cutoff detection sensor 2 may be multistage in the vertical direction as viewed from the side, or the height may be adjustable. Thereby, a human body and a small animal, a bird, etc. can be distinguished easily.

  In each of the above embodiments, the sensor installation place 4 and the control unit 5 are separately arranged, but may be integrated. In addition, the sensor installation location 4 may not be integrated, and a unit for controlling the information from each detection sensor 2 unit may be provided so that the unit of each detection sensor 2 can be installed at an arbitrary position.

  In each of the above embodiments, when the camera operation output unit 9 detects the passing position of the intruder H, the camera operating output unit 9 outputs a passing position information signal for the surveillance camera 3 to be automatically directed to that position. Based on the position detection information from the operation output unit 9, a guard or the like may manually turn the surveillance camera 3. Alternatively, the monitoring camera 3 may be omitted, and a security guard or the like may be informed of an intruder position detection alarm. In this case, a guard or the like can rush to the detection position by an alarm notification.

1: Monitoring device with position detection unit 2: Opposing warning line cutoff detection sensor 3: Monitoring camera 5: Control unit 7: Position detection unit 8: Alarm output unit 9: Output unit for camera operation A: Warning area H: Intruder S: Warning line T: Transmitter R: Receiver

Claims (6)

The transmitter and receiver of the opposing warning line cutoff detection sensor that sets a warning line consisting of detection waves in the warning area have at least a transmission path in which the detection waves are substantially horizontal in a side view and have transmission paths that are oblique to each other in a plan view. A monitoring device that is arranged opposite to form a warning line including two detection waves, detects an intrusion by blocking the warning line, and monitors an intruder,
A monitoring device with a position detection unit, comprising a position detection unit for detecting a passing position of an intruder based on the interception of the oblique warning line by the intruder. In claim 1,
In the opposing warning line cutoff detection sensor, two sets of transmitters and receivers are installed at both ends in the longitudinal direction of the warning area, and one of each pair of transmitter and receiver is connected to the longitudinal direction at one end of the warning area. A monitoring device with a position detector, which is spaced apart in a direction orthogonal to each other, and has two diagonal warning lines formed on the other end, with the other of each set placed close to each other. In claim 1,
In the opposed-type warning line cutoff detection sensor, four sets of transmitters and receivers are installed at both ends in the longitudinal direction of the warning area, and each pair of transmitters or receivers is orthogonal to the longitudinal direction at both ends of the warning area. Placed at each end in the direction to
The four warning lines have a substantially horizontal transmission line in side view, the two warning lines have a transmission line parallel to the longitudinal direction in plan view, and the other two warning lines in plan view. The monitoring device with a position detection unit is formed so as to have an oblique transmission path so as to intersect with each other substantially at the center of the warning area. In any one of Claim 1 to 3,
There is a surveillance camera that images the alert area,
A monitoring device with a position detection unit, wherein the monitoring camera is set so as to be able to be directed to the detected passing position of the intruder. In any one of Claim 1 to 3,
A monitoring device with a position detection unit that outputs a passing position information signal for turning the monitoring camera to a passing position of an intruder based on a detection result by the position detection unit. In claim 4 or 5,
A monitoring device with a position detection unit, in which a single monitoring camera is provided in a plurality of warning areas.

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