JP4336843B2 - Tilt detection unit for surveillance cameras - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a detection unit that can automatically detect a change in the orientation of a surveillance camera.
[0002]
[Prior art]
Monitoring cameras are installed in stores that require monitoring, important buildings, etc., and the images sent from these monitoring cameras are displayed on the monitor in a monitoring room, etc., and the surveillance staff can constantly monitor or record these images. Surveillance camera systems such as saving are used. In the surveillance camera used in such a system, an imaging target is determined in advance and fixed in that direction.
[0003]
[Problems to be solved by the invention]
However, in such a surveillance camera system, it is assumed that the direction of the surveillance camera is changed by the hand of a person who tries to intrude into the building where the surveillance camera is installed before the invasion action is reached. The In this way, if the direction of the surveillance camera is changed, the monitoring personnel who monitor the video from many surveillance cameras simultaneously with multiple monitors or switch the video sequentially to monitor the abnormality. There is a possibility that it cannot be discovered.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a tilt detection unit for a monitoring camera so that a detection signal is output when the monitoring direction of the monitoring camera is moved from a predetermined installation state. is there.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a view showing a tilt detection unit of the present invention and an installation state of the unit. Reference numeral 1 denotes an inclination detection unit, 2 an adjustment pin, 3 a surveillance camera body, and 4 a surveillance camera fixing member. The surveillance camera fixing member 4 is supported by an arm (not shown) or the like installed on a wall surface or ceiling surface, and has a structure that rotates in the vertical direction about the shaft 5 and is fixed in a predetermined direction. .
The inclination detection unit 1 includes two sets of inclination sensors 11 attached to a printed circuit board 12 and has a structure in which they are attached to a fixture 13.
[0006]
FIG. 2 is an enlarged view of the inclination sensor 11 and the printed circuit board 12, and outputs a detection signal when the detection axis Y in the figure is inclined by 90 ° or more with respect to the vertical direction. FIG. 4 is a view showing the member 6 for making the fixture 13 . As shown in the drawing, a plate member 6 such as aluminum having a round hole 7 is bent at a broken line portion in the drawing to complete the fixture 13.
[0007]
FIG. 3 is an enlarged view of the tilt detection unit 1, and the angle θ formed by the mounting surface of the fixture 13 that fixes the two printed circuit boards 12 to which the tilt sensor 11 is mounted is in the range of 10 ° to 20 °. It shows that it is shaped like The tilt detection unit 1 is fixed in a form to be connected to the adjustment pin 2 in the surveillance camera fixing member, and can be rotated only by turning the head of the adjustment pin exposed to the outside with a tool such as a Phillips screwdriver. ing.
[0008]
Using the tilt detection unit having the above configuration, as shown in FIG. 1, the tilt detection unit inside the installed surveillance camera is reset to the state shown in FIG. In this state, the two tilt sensors do not output the detection output, and when the rotation is rotated to the right or left by an angle of θ / 2, a detection signal is output from one of the tilt sensors. Since the tilt detection unit is rotated by the adjustment pin 2, even when the direction of the surveillance camera is fixed upward or downward from the state shown in FIG. It can be reset to a state where both outputs are not output. If the output signal of the tilt detection unit is sent to the monitoring room, it is possible to determine which monitoring camera has been moved by the monitor.
[0009]
Provided with a display unit (not shown) that lights when the two tilt sensors are outputting detection signals, the tilt detection unit can be easily reset by rotating the adjustment pin 2. That is, the reset operation is completed by stopping the adjustment pin at a substantially middle point between the position where the display unit of one tilt sensor is lit and the position where the display unit of the other tilt sensor is lit. If this display unit is activated only during installation work or inspection work, abuse by an intruder can be prevented.
[0010]
【The invention's effect】
According to the present invention, although it is a simple configuration in which two inclination sensors are attached to a fixture, it is possible to accurately detect a change in direction after installation by simply adding to a surveillance camera that can be adjusted in the vertical direction. The ability to detect sabotage for this type of surveillance camera has been greatly improved.
As the angle formed by the surface on which the tilt sensor is attached is smaller, a tilt detection unit that detects a slight tilt change is realized. In the present invention, the angle is set to 10 ° to 20 ° in consideration of the detection accuracy of the tilt sensor to be used and the dimensional accuracy of the mounting mechanism, but this angle can be appropriately set according to the angle range to be detected.
[Brief description of the drawings]
FIG. 1 is a view showing a tilt detection unit of the present invention and an installation state of the unit.
FIG. 2 is an enlarged view of a tilt sensor 11 and a printed circuit board 12 used in the present invention.
FIG. 3 is an enlarged view of the tilt detection unit 1 of the present invention.
FIG. 4 is a view showing an outer shape of a member 6 for making the fixture 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Inclination detection unit 2 ... Adjustment pin 3 ... Surveillance camera body 4 ... Surveillance camera fixing member 5 ... Surveillance camera rotating shaft 6 ... Member 7 for making the fixture 3 ... Round hole 11 ... Inclination sensor 12 ... Printed circuit board 13 …Fixture

Claims (1)

An inclination detection unit attached to the inside of the surveillance camera or to the surveillance camera fixing member, wherein the inclination detection unit has a detection axis extending in the vertical direction when the state attached to a printed circuit board placed horizontally is a reference position. Two tilt sensors 11 that output detection signals when tilted by more than °° are used, and an angle θ formed by a plane that fixes the printed circuit board 12 to which the two tilt sensors are attached is 10 ° to 20 °. When the adjusting pin 2 that is attached to the fixing tool 13 that is the range and is exposed to the outside of the surveillance camera or the surveillance camera fixing member is rotated by a tool that fits it, the adjustment pin 2 is rotated. The entire tilt detection unit rotates for the first time, and two tilt sensors 11 attached to the tilt detection unit are provided. Surveillance camera tilt detection unit, characterized in that an adjustment mechanism for resetting both the state not emitting detection output as the reference state of the tilt detection unit.

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