JPH071926B2 - ITV camera viewing angle control method - Google Patents

Description

The present invention relates to a viewing angle control method for an ITV camera that monitors indoor or outdoor conditions.

[Conventional technology]

Recently, an ITV camera is used to monitor an indoor or outdoor situation, and by displaying an image signal captured by this ITV camera on a monitor arranged at a predetermined monitoring place,
I am trying to monitor the condition.

In particular, recently, for the purpose of crime prevention and disaster prevention, the ITV camera's viewing angle is set according to the notification of various sensors installed in the room, so that the ITV camera can be moved quickly for tracking. Is being developed.

In such a security system, the larger the room to be monitored, the greater the number of sensors for crime prevention and disaster prevention. Moreover, it is necessary to perform zooming in order to accurately grasp the situation with the ITV camera. This allows ITV
Since the viewing angle of the camera becomes narrow, it is necessary to move the ITV camera quickly.

Therefore, when an abnormality is detected by various conventional sensors, when setting the viewing angle of the ITV camera in the monitoring area of the abnormality detection sensor, fixed information about the position coordinates of the various sensors with respect to the ITV camera and the size of the monitoring area. Is stored in a storage device, and when an abnormality is detected by the sensor, based on the position coordinate and the size of the monitoring area related to the sensor.
The viewing angle of the ITV camera is set.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional example, it is necessary to store fixed information such as position coordinate information of various sensors for the ITV camera and boundary coordinate information indicating the size of the monitoring area in the storage device, which increases the storage capacity. When an abnormality is detected by multiple sensors, the ITV camera's viewing angle is calculated individually from the position coordinates and boundary coordinate information for each sensor, and it is determined from these calculation results whether or not it falls within the same viewing angle. There is an unsolved problem that the calculation processing time becomes long.

In order to solve this unsolved problem, for each sensor, position coordinate information and monitoring region size information indicating the size of the monitoring region are stored in a storage device, and based on the position coordinate information and the monitoring region size information. It may be possible to calculate the boundary coordinates by using the above method, but in this case, the viewing angle of the ITV camera is set after the calculation of the boundary coordinates, which causes a new problem that the calculation time becomes longer.

Therefore, the present invention has been made by paying attention to the unsolved problem of the above-mentioned conventional example, and regarding other situation monitoring sensors including the situation monitoring sensor in the minimum monitoring area, the minimum ITV that can reduce the storage capacity by shortening the calculation processing time and speedily controlling the viewing angle of the ITV camera by suspecting that the status monitoring sensor in the monitoring area has detected an abnormality It is intended to provide a view angle control method for a camera.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, a plurality of situation monitoring sensors having different priorities and different monitoring areas are arranged so that the monitoring areas overlap each other, and an abnormal state is detected by the situation monitoring sensors. At this time, an ITV camera view angle control system is provided in which the monitoring area of the situation monitoring sensor is moved by a drive mechanism so that the viewpoint can be changed vertically and horizontally. Of the situation monitoring sensor having the minimum monitoring area, the position coordinates for the ITV camera are set, and when another situation monitoring sensor including a plurality of minimum monitoring areas detects an abnormality, all of them are included in this. It is characterized in that it is processed as if an abnormality is detected by the situation monitoring sensor in the minimum area of. Here, the situation monitoring sensor having the minimum monitoring area is an infrared sensor that detects intrusion of a person into a room, and the situation monitoring sensor having the maximum monitoring area is a smoke detection sensor. It is desirable that the situation monitoring sensor having a monitoring area is a temperature sensor.

[Action]

In the present invention, when an abnormality detection signal is output from the situation monitoring sensor having the minimum monitoring area, the viewing angle of the ITV camera is calculated based on the position coordinates of the situation monitoring sensor that senses the abnormality with respect to the ITV camera. The ITV camera's viewing angle is set so that the monitoring area of the situation monitoring sensor that detects an abnormality in the ITV camera falls within the field of view.

Further, when a situation monitoring sensor having a monitoring area including a plurality of minimum monitoring areas detects an abnormality, the situation monitoring sensors of all the minimum monitoring areas included in the monitoring area of this situation monitoring sensor detect the abnormality. Based on the position coordinates of the situation monitoring sensor in each minimum monitoring area, doubting that it was detected
The viewing angle of the ITV camera is calculated, and the viewing angle of the ITV camera is set so that the monitoring area of the situation monitoring sensor that has detected an abnormality is within the field of view.

Further, when the situation monitoring sensors in different monitoring areas simultaneously detect an abnormality, first, the minimum monitoring area sensor included in the situation monitoring sensor having a wide monitoring area and the minimum monitoring area included in the situation monitoring sensor having a small monitoring area are detected. When the minimum monitoring area sensors of both sensors match, the ITV camera's viewing angle is calculated based on the position coordinates of the minimum monitoring area sensor included in the monitoring sensor for a wide monitoring area The ITV camera is controlled to move so that the surveillance area of the surveillance sensor is within the field of view, and when the minimum surveillance area sensors of both do not match, the situation monitoring sensor with a higher priority or the situation monitoring sensor that has detected an abnormality later Set the viewing angle of the ITV camera so that the surveillance area of is in view.

Furthermore, when the same kind of situation monitoring sensor senses an abnormality at the same time, if the position coordinates of both are within the maximum viewing angle of the ITV camera, the IT based on the intermediate coordinates of the two
The view angle of the V camera is calculated, and when it exceeds the maximum view angle, the view angle of the ITV camera is set so that the monitoring area of the situation monitoring sensor that has detected an abnormality later enters the field of view.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment in which the present invention is applied to a security system.

In the figure, 1 is an ITV camera mounted on the ceiling in each room in the building so as to be movable vertically and horizontally, and is composed of a turning table or the like that is turned to a desired rotation angle by a pulse motor fixed to the ceiling. The horizontal rotation mechanism 2 is rotatably attached to a pair of support pieces 2a that are planted in the horizontal rotation mechanism 2.
Is rotated in the left-right direction in accordance with the rotation of the, and is vertically rotated by the vertical rotation mechanism 3 fixed to the support piece 2a.

In addition, as shown in FIG. 2, on the ceiling of the room, infrared sensors A _{1 to} A ₉₆ having a minimum monitoring area for detecting the intrusion of a person as a situation monitoring sensor, have a high priority for disaster prevention and have a maximum priority. Smoke detection sensors B _{1 to} B ₆ having a monitoring area and infrared sensors A _{1 to} A ₉₆ and temperature detection sensors C _{1 to} C ₂₄ having a monitoring area intermediate between the smoke detection sensors B _{1 to} B ₆ are arranged at predetermined positions. It is set up. Here, the smoke detection sensors B ₁ , B ₂ ... B ₆ are monitored by 16 infrared sensors A _{1 to} A ₁₆ , A _{17 to} A _{32, respectively.}
...... A _{81 to} A ₉₆ and four temperature sensors C _{1 to} C ₄ , C _{5 to} C ₈
...... C ₂₁ ~C is selected in size including _24, temperature sensing sensor C _1, C ₂ monitoring area of ...... C ₂₄ are each four IR sensors _{A 1 ~A 4, A 5 ~A} 8 …… The size is selected to include A _{93 to} A ₉₆ .

The ITV camera 1, the horizontal rotation mechanism 2 and the vertical rotation mechanism 3 are driven and controlled by the ITV control device 8 connected to the centralized monitoring device 7 of the management center via the in-building network 6, and the ITV camera The image signal output from the device 1 is transmitted to the central monitoring device 7 via the ITV control device 8 and the building network 6. Further, each sensor Ai (i = 1,2 ... 96), Bj (j = 1,2 ... 6) and Ck
The abnormality detection signal of (k = 1, 2 ... 24) is also transmitted to the centralized monitoring device 7 through the in-building network 6.

The centralized monitoring device 7 includes a central processing unit 10, an interactive display 11 and an alarm generation circuit connected to its system bus.
12, a video disk 14 for recording the image signal selected by the video switcher 13 in response to a command signal from the central processing unit 10, and a monitor 15 for displaying the image signal selected by the video switcher 13.

The central processing unit 10 stores the IT of each infrared sensor Ai in its storage unit.
The position coordinates for the V camera 1 are stored in advance, and a corresponding storage table of each smoke detection sensor Bj and the identification number of the infrared sensor Ai included in the monitoring area and each temperature detection sensor Ck and the monitoring area are included. Infrared sensor
A storage table corresponding to the identification number of Ai is stored in the storage unit in advance. Each infrared sensor Ai, smoke detection sensor
When receiving the abnormality detection signal output from Bj and the temperature detection sensor Ck, and these sensors Ai to Ck do not sense an abnormal state, the ITV camera 1 in each room is sequentially operated to image the indoor situation, The image signal is selected by the video switcher 13 and displayed on the monitor 15. When an abnormal state is detected by at least one of the sensors Ai to Ck, predetermined arithmetic processing is executed to determine the viewpoint position of the ITV camera 1. That is, a movement command indicating the movement position of the horizontal rotation mechanism 2 and the vertical rotation mechanism 3 is output to the ITV control device 8 via the in-building network 6, and the video switcher 13 and the video disc 14 are operated to prevent crime and disaster prevention. Set to the monitoring state.

Next, the operation of the above embodiment will be described with reference to the flowchart of FIG. 3 showing the processing procedure of the central processing unit 10.

First, when installing the ITV camera 1, each infrared sensor placed indoors with the installation position of the ITV camera 1 as a reference.
The storage unit is a coordinate data storage table in which each identification number of Ai and the position coordinates for the ITV camera 1 are associated with each other.
In addition to being stored in RAM, the smoke sensor Bj and temperature sensor Ck identification numbers and the infrared sensors included in them
The correspondence storage table with the identification number of Ai is stored in the RAM.

Then, after creating each storage table, the process of FIG. 3 is executed.

The process shown in FIG. 3 is executed as a timer interrupt process at predetermined time intervals of 50 msec, for example, and at each step, each sensor Ai to Ck is processed.
Read the detection signal of time sequentially, and then move to step to detect anomaly and determine whether there is a sensor outputting the detection signal of logical value "1", for example, and detect the anomaly If there is no sensor, the timer interrupt process is terminated as it is, and if there is a sensor that has detected an abnormality, the process proceeds to step.

In this step, it is determined whether or not there is one sensor that has detected an abnormality. At this time, when there is only one sensor that has detected an abnormality, the process proceeds to step and it is determined whether or not the sensor that has detected an abnormality is the smoke detection sensor Bj. At this time, when the abnormality detection sensor is the smoke detection sensor Bj, the process proceeds to step, the storage table is referred to based on the identification number of the smoke detection sensor Bj, and the smoke detection sensor Bj is included in the monitoring area. The identification code of the 16 infrared sensors Ai is read out, and then the process proceeds to step to form an infrared sensor diagonally from the identification number, that is, the smallest identification code Amin and the largest identification code of the 16 identification numbers.
A ₁ and when Amax (for example, a smoke sensor B ₁
A ₁₆ ), and then moves to the step where the position coordinates (x ₁ ,
Intermediate coordinates (x _M , y _M ) of y ₁ ), (x ₂ , y ₂ ) are calculated according to the following formulas (1) and (2), and these are calculated as target position coordinates (x _T , x
_{After T} is updated and stored in a predetermined storage area of the storage unit, the process proceeds to the step described later.

On the other hand, if the determination result of the step is that the abnormality detection sensor is not the smoke detection sensor Bi, the process proceeds to step and it is determined whether the abnormality detection sensor is the temperature detection sensor Ck. At this time, when the abnormality detection sensor is the temperature detection sensor Ck, the process proceeds to step to refer to the storage table based on the identification code of the temperature detection sensor Ck, and the infrared rays included in the monitoring area of the temperature detection sensor Ck The identification code of the sensor Ai is read out, and then the process proceeds to step to form an infrared sensor forming a diagonal from the identification code, that is, the smallest identification code Amin and the largest identification code Am of the four identification numbers.
ax (for example, A ₁ and A ₄ when the temperature sensor is C ₁ )
, And then move to the step and position coordinates (x ₁ , y ₁ ), (x _{1 of} each infrared sensor Amin and Amax forming a diagonal
The intermediate coordinates (x _M , y _M ) of ₂ , y ₂ ) are expressed by the above formula (1) and (2).
The calculation is performed according to the formula, and the target position coordinates (x _T , y _T ) are updated and stored in a predetermined storage area of the storage unit, and the process proceeds to the step described below.

When the result of the step determination is that the abnormality detection sensor is not the temperature detection sensor Ck, it is determined that the abnormality detection sensor is the infrared sensor Ai, and the process proceeds to step, and the previously stored sensor and its position coordinate with respect to the ITV camera 1 are detected. Calculate the position coordinates (x ₁ , y ₁ ) of the sensor that detected the abnormality by referring to the coordinate data storage table that indicates the relationship with the target data, and use this as the target position coordinates (x _T , y _T ) in the specified storage area. Update and store.

Next, the process proceeds to step, and the target horizontal angle θ ₁ of the ITV camera 1 which becomes the target moving position based on the target position coordinates (x _T , y _T ) stored in the predetermined storage area is set to the following (3).
Calculate according to the formula.

θ ₁ = tan ⁻¹ (y _T / x _T ) ... (3) Then, the process proceeds to step, the current horizontal angle θ ₂ of the ITV camera 1 is read from the predetermined storage area of the storage unit, and then the process proceeds to step. Te by subtracting the current horizontal angle theta ₂ from the target horizontal angle theta ₁ calculates the horizontal movement angle theta _3, calculates the horizontal rotation of the horizontal rotation mechanism 2 (movement amount) from the horizontal moving angle theta _3.

Next, in step S4, as shown in FIG.
The distance L between the ITV camera 1 and the sensor is calculated from the target position coordinates (x _T , y _T ), and then the process proceeds to the step to measure the distance L between the camera and the sensor and the preset floor and ceiling surfaces. Based on the value H obtained by subtracting the average height of a person from the distance, the following formula (4) is calculated to calculate the target vertical angle φ ₁ .

φ ₁ = tan ⁻¹ (H / L) (4) Next, move to step, read the current vertical angle φ ₂ of the ITV camera 1 from the predetermined storage area of the storage unit, and then move to step and aim. calculating a vertical movement angle phi ₃ by subtracting the current vertical angle phi ₂ from the vertical angle phi _1, calculated from the vertical displacement angle phi ₃ vertical pivot amount of vertical circuitry 3 (amount of movement).

Next, the process proceeds to step to output the horizontal rotation amount and the vertical rotation amount to the ITV control device 8 via the in-building network 6, and then the timer interrupt processing ends.

On the other hand, if the determination result of the step is that there are a plurality of abnormality detection sensors, the process proceeds to step and it is determined whether or not there are two abnormality detection sensors. At this time, when there are two abnormality detection sensors, the process proceeds to step and it is determined whether or not the sensors are of the same type. At this time, when the sensor is the same type sensor, the process shifts to the step and it is determined whether the abnormality detection sensor is the smoke detection sensor Bj as in the above step. At this time, when the abnormality detection sensor is a smoke detection sensor, the process proceeds to step, and for each smoke detection sensor Bj, infrared rays included in the monitoring area of the smoke detection sensor Bj are referred to by referring to the storage table as in the above step. Read the identification number of the sensor Ai, then move to step to search diagonal infrared sensors Amin and Amax in the same manner as the above step, and then move to step based on the position coordinates of both infrared sensors Amin and Amax. By calculating the equations (1) and (2), the intermediate coordinates (x _M1 , y _M1 ) and (x _M2 , y _M2 ) that are the reference coordinates of each smoke detection sensor are calculated, and these are used as the angle difference determination criteria. After the coordinates are updated and stored, the process proceeds to the step described later.

On the other hand, when the determination result of the step is that the abnormality detection sensor is not the smoke detection sensor Bj, the process proceeds to step and it is determined whether or not the abnormality detection sensor is the temperature detection sensor Ck. At this time, when the abnormality detection sensor is the temperature detection sensor Ck, the process proceeds to step and each temperature detection sensor is detected.
Regarding Ck, as in the above step, the identification number of the infrared sensor Ai included in the monitoring area of the temperature sensing sensor Ck is read by referring to the storage table, and then the process proceeds to step and the diagonal infrared sensor as in the above step. Search for Amin and Amax, then move to step and perform the calculation of the above formulas (1) and (2) based on the position coordinates of both infrared sensors Amin and Amax, and become the reference coordinate of each temperature sensor. Calculate the coordinates (x _M1 , y _M1 ), (x _M2 , y _M2 ),
After updating and storing these as the angle difference determination reference coordinates, the process proceeds to the step described later.

When the result of the step determination is that the abnormality detection sensor is not the temperature detection sensor, it is determined that the abnormality detection sensor is the infrared sensor Ai and the process proceeds to step. Is calculated, these are updated and stored as the angle difference determination reference coordinates, and the process proceeds to step.

In the step, the horizontal angles θ _A and θ _B are calculated by performing the calculation of the equation (3) on the basis of the angle difference determination reference coordinates corresponding to each sensor stored in the storage unit.
_The horizontal angle difference θ _D is calculated by calculating the difference value between _A and θ _B.

Next, move to step, where the horizontal angle difference θ _D is ITV.
Stabilize whether or not the maximum viewing angle α of the camera 1 is less than or equal to θ
_{When D} ≤ α, the process proceeds to step, and the intermediate point coordinates (x _M , y _M ) of the angle difference determination reference coordinates are calculated according to the equations (1) and (2) and updated as the target position coordinates. After storing, the process proceeds to the step and the movement amount calculation process is performed.

Further, when the determination result of the step is θ _D > α, the process proceeds to the step, the position coordinates of the sensor for which an abnormality is sensed afterward are updated and stored as the target position coordinates, and then the process proceeds to the step to perform the movement amount calculation process. To do.

Furthermore, the judgment result of the step shows that the abnormality detection sensor is 3
If the number is equal to or more than one, the process proceeds to the step, the ITV camera 1 is set to the maximum viewing angle α, the preset position coordinates capable of photographing the entire view of the room are updated and stored as the target position coordinates, and then the process proceeds to the step and moves. A quantity calculation process is performed.

Furthermore, when the determination result of the step is a different type of sensor, it is determined whether or not the monitoring areas of both sensors that have detected an abnormality overlap in step. At this time, when the monitoring area of the other sensor is included and overlaps in the monitoring area of the one sensor, the process proceeds to step, and the same processing as the processing of the step ~ or step ~ is performed for the sensor with a large monitoring area. After that, the intermediate coordinates are calculated, and the intermediate coordinates are calculated and updated as the target position coordinates.

If the determination result of the step is that the monitoring areas of both the sensors do not overlap, the process proceeds to the step to determine whether one sensor has a high priority, that is, the smoke detection sensor, and is the smoke detection sensor Bj. Occasionally, the process proceeds to step, the same processing as in steps 1 to 3 is performed to calculate intermediate coordinates, which are updated and stored as target position coordinates, and then the process proceeds to step.

Further, when the determination result of the step is neither the abnormality detection sensor nor the smoke detection sensor, it is determined that the abnormality detection sensors are the temperature detection sensor Ck and the infrared sensor Ai, and the process proceeds to step. The intermediate coordinates are calculated by performing the same processing as the above steps
After updating and storing this and the position coordinates of the infrared sensor Ai as the angle difference determination reference coordinates, the process proceeds to the step,
It is determined whether or not it falls within the field of view of the ITV camera 1.

In the process of FIG. 3, steps ~, ~
, ~, ~, ..., constitute the coordinate calculating means, the process of step ~ constitutes the viewing angle calculating means, and the step processing and the ITV control device 8 constitute the movement amount controlling means. .

Therefore, when the number of abnormality detection sensors is one, the target position coordinates are set according to the type of the abnormality detection sensor, and the horizontal rotation mechanism 2 is set so that the viewpoint of the ITV camera 1 coincides with the target position coordinates. Is driven and the vertical rotation mechanism 3 is driven so that the viewpoint coincides with the average height position in the target position coordinates, so that the ITV camera 1 can accurately capture the abnormal state detected by the abnormality detection sensor. , I
The video signal taken by the TV camera 1 is transmitted to the central monitoring device 7 through the ITV control device 8 and the building network 6.
It is displayed on the monitor 15 via the video switcher 13 and recorded on the video disk 14.

Therefore, by monitoring the monitor 15, it is possible to accurately comprehend the occurrence state of the abnormality, and early detection in crime prevention and disaster prevention can be performed.

Also, when there are two abnormality detection sensors of the same type, the angle difference determination reference coordinates are calculated for each sensor, and the angle difference θ _D between the abnormality detection sensors is less than or equal to the maximum viewing angle α of the ITV camera 1 from these. If it is determined that θ _D ≦ α, it is possible to bring both abnormality detection sensors into the visual field range by setting the ITV camera 1 to the maximum viewing angle and setting the intermediate coordinates between the two as the target position coordinates. Both abnormal conditions can be monitored at the same time, and the angle difference θ _D between them can be ITV.
When the maximum viewing angle α of the camera 1 is exceeded, the latest situation can be taken by the ITV camera 1 by using the position coordinates of the abnormality detection sensor that has detected an abnormality later as the target position coordinates. Measures can be easily implemented.

Furthermore, when there are two different types of anomaly detection sensors,
It is determined whether or not the two monitoring areas overlap, and if they do, the intermediate coordinates of the abnormality detecting sensor having a large monitoring area are set as the target position coordinates, so that both the abnormality detecting sensors have a visual field range of the ITV camera 1. It is possible to put them in the same area at the same time, it is possible to accurately grasp the abnormal state of both, and when the monitoring areas of both do not overlap, first determine whether or not the sensor with a high priority is included and give priority. When a sensor with a high priority is included, the intermediate coordinates of the sensor with a high priority are used as the target position coordinates, so that the most important sensor can be included in the field of view of the ITV camera 1 and the priority is high. When the sensor is not included,
When both are included in the field of view of the ITV camera 1, both sensors are included in the field of view of the ITV camera 1 with the intermediate coordinates of the both as targets, and when they are not included, the position of the sensor that detects an abnormality later is targeted. The latest situation can be monitored as position coordinates.

Further, when there are three or more sensors that have detected an abnormality, by setting the position coordinates at which the entire view can be captured by the ITV camera 1 as the target position coordinates, it is possible to monitor the abnormal states of all the abnormality detection sensors at once. it can.

Therefore, for example, when one person intrudes into a room and sets fire, first the infrared sensors Ai sequentially detect abnormal states according to the movement of the person, and then when smoke is set, the smoke detection sensor Bj detects abnormalities. At this time, since the monitoring area of the smoke detecting sensor Bj and the monitoring area of the infrared sensor Ai overlap, the monitoring area of the smoke detecting sensor Bj is photographed by the ITV camera 1, and the image information thereof is monitored by the monitor 15 of the central control unit 8. Is displayed in.

Further, for example, when a plurality of persons enter the room, when the intruders are separated and moved by two persons, an abnormality detection detection signal is obtained from the infrared sensor Ai which is different according to the intruders, and the monitoring areas of both of them are ITV. When entering the visual field range of the camera 1, the intermediate coordinates of both infrared sensors can be used as the target position coordinates, and the movements of both can be simultaneously photographed by the ITV camera 1.
When it is out of the field of view of the TV camera 1, the monitoring area of the infrared sensor Ai that has detected an abnormality later can be taken by the ITV camera 1, and two people do not move at the same time. The ITV camera 1 can take pictures alternately with the movement of the.

Further, when changing the installation position of the ITV camera 1, each sensor Ai stored in the coordinate data storage table is changed.
It is possible to easily respond by simply reading the position coordinate data of ~ Ck and changing it.

As described above, according to the above embodiment, the position coordinates of the sensor having the minimum monitoring area with respect to the ITV camera 1 are stored,
For a sensor having a large monitoring area including this minimum monitoring area, the optimum viewing angle of the ITV camera 1 corresponding to each sensor can be set only by taking correspondence with the sensor having the minimum monitoring area. Therefore, the supervisor of the centralized monitoring device 7 can accurately grasp the abnormal state without operating the moving position of the ITV camera one by one. Further, even when an abnormality is detected by a plurality of sensors, the viewing angle of the ITV camera corresponding to the abnormal state is automatically selected, which has an advantage that no troublesome operation is required. Moreover, when the viewing angle of the ITV camera 1 is set as in the above-described embodiment, the movement amount of the ITV camera 1 is calculated by calculation based on the position coordinates of the sensor in the minimum monitoring area. There is an advantage that data can be easily input when newly installing or changing the installation position by only inputting the position coordinates of the sensor in the minimum monitoring area with respect to the ITV camera 1. Furthermore, by making the identification code of the infrared sensor Ai included in the smoke detection sensor Bj and the temperature detection sensor Ck a continuous number, it becomes easy to calculate the intermediate coordinates, and it is possible to determine whether or not the monitoring areas overlap. There is an advantage that it becomes easy.

In the above embodiment, the case where the indoor condition is monitored has been described, but the present invention can also be applied to the case where the outdoor condition is monitored.

Further, the horizontal rotation mechanism 2 and the vertical rotation mechanism 3 are not limited to the above-mentioned configurations, and any other rotation mechanism can be applied.

Further, in the above embodiment, each sensor Ai to Ck and IT
The case where the V control device 8 is connected to the centralized monitoring device 7 via the network 6 in the building has been described, but the present invention is not limited to this, and when the centralized monitoring device 7 is not installed in the building, a telephone line or the like is used. It may be used and connected to the centralized monitoring device 7.

〔The invention's effect〕

As described above, according to the present invention, a plurality of status monitoring sensors having different priorities and different monitoring areas are arranged so that the monitoring areas overlap each other, and the abnormal status is detected by the status monitoring sensors. At this time, the ITV camera is used to shoot the monitoring area of the situation monitoring sensor with an ITV camera that can be moved up and down and left and right by the drive mechanism.
A view angle control system for a camera, wherein the position coordinates for the ITV camera are set for a situation monitoring sensor having a minimum surveillance area among the situation monitoring sensors, and another situation surveillance sensor including a plurality of minimum surveillance areas is set. When a sensor detects an anomaly, it is processed as if the anomaly was detected by the status monitoring sensors in all the minimum areas included in the sensor. As for the monitoring sensor, it is not necessary to store the position coordinate information and the boundary coordinate information indicating the boundary of the monitoring area, and the storage capacity can be reduced, and when multiple situation monitoring sensors detect an abnormality at the same time. It is possible to quickly determine whether the monitoring areas of each sensor overlap, and calculate the monitoring area individually for each sensor as in the conventional example. , ITV and based on the calculation result
Compared with the case of setting the field of view of the camera, the calculation processing time can be significantly shortened, and the ITV camera's shooting can be controlled appropriately according to the abnormal state.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an arrangement state of an ITV camera and each sensor, FIG. 3 is a flow chart showing an example of a processing procedure in a central processing unit, FIG. FIG. 4 is an explanatory diagram of the vertical movement amount of the ITV camera. In the figure, 1 is an ITV camera, 2 is a horizontal rotation mechanism, 3 is a vertical rotation mechanism, A _{1 to} A ₉₆ are infrared sensors, B _{1 to} B ₆ are smoke detection sensors, and C _{1 to} C ₂₄ are temperature detection sensors. , 6 in the building network, 7 centralized monitoring device, 8 ITV control device, 10 central processing unit, 11 interactive display, 12 alarm generation circuit,
14 is a video disk and 15 is a monitor.

Claims (2)

[Claims] 1. A plurality of status monitoring sensors having different priorities and different monitoring areas are arranged so that the monitoring areas overlap each other, and when an abnormal state is detected by the status monitoring sensors, the status monitoring sensors are provided. An ITV camera viewing angle control method in which the monitoring area of the sensor is moved by a drive mechanism so that the viewpoint can be changed up, down, left, and right, and it has a minimum monitoring area of the situation monitoring sensors. When the position coordinate for the ITV camera is set for the situation monitoring sensor and another situation monitoring sensor including a plurality of minimum monitoring areas detects an abnormality, the situation monitoring of all the minimum areas included in this sensor is performed. A viewing angle control method for ITV cameras, which is characterized by processing as if an abnormality was detected by a sensor. 2. The condition monitoring sensor comprises an infrared sensor having a minimum monitoring area, a maximum monitoring area and a smoke sensor having the highest priority, and a temperature sensor having a monitoring area intermediate between the two sensors. The viewing angle control method of the ITV camera described in item (1).