JP4740823B2 - Surveillance camera device - Google Patents

Description

  The present invention relates to a monitoring camera device having a function of preventing snow and ice adhesion.

A conventional surveillance camera device is composed of the following elements (for example, see Patent Document 1).
(1) A surveillance camera that captures an image of the surveillance area and outputs an image of the surveillance area. (2) A camera case that has an opening in the photography direction of the surveillance camera and houses the surveillance camera. (3) An opening of the camera case. Translucent body provided in the part (4) Defroster provided on the inner surface of the translucent body and generating heat when energized (5) Metal front panel for supporting the translucent body on the camera case (6) Front panel Panel heating unit for heating the defroster and the front panel, and when the temperature falls below a predetermined temperature, the temperature detection unit for starting the defroster and the panel heating unit

JP 2002-152563 A (paragraph numbers [0014] to [0018], FIGS. 1 and 2)

Since the conventional surveillance camera device is configured as described above, the defroster and the panel heating unit can reduce the adhesion of snow and ice on the front panel. However, in an environment where the wind speed is high, the temperature is low, or the amount of snowfall is large, the amount of heat lost to the outside air or snow and ice exceeds the amount of heat generated by the defroster or panel heating unit, and snow melting may not be possible. In such a case, there has been a problem that the visual field of the monitoring camera may be narrowed due to the attachment of snow and ice on the light transmitting body and the front panel.
Also, if snow or ice adheres to a location that does not receive heat from the defroster or panel heating unit (for example, a wiper), the snow and ice will not come off unless the environment recovers to 0 degrees Celsius or more, so the field of view of the surveillance camera is narrow. There was a problem that could become.
Furthermore, there has been a problem that secondary problems may occur, such as snow and ice melted by the defroster and the panel heating unit refreeze, and ice and icicles may adhere to the surveillance camera.

  The present invention has been made to solve the above-described problems, and can reduce the adhesion of snow and ice on the front panel and the wiper even in an environment where the wind speed is high, the temperature is low, or the amount of snowfall is large. At the same time, it is an object to obtain a surveillance camera device capable of reducing the generation of ice and icicles.

According to the invention the surveillance camera apparatus, houses a monitoring camera for photographing a monitoring area, around the camera case to have the opening in the shooting direction of the camera, mounted so as to cover the opening of the camera case, A sheet member that deforms and vibrates when receiving wind pressure is attached.

According to the present invention, houses a monitoring camera for photographing a monitoring area, around the camera case to have the opening in the shooting direction of the camera, mounted so as to cover the opening of the camera case, subjected to wind pressure As it is configured to attach a seat member that deforms and vibrates, it is possible to reduce the adhesion of snow and ice on the front panel and wiper even in environments such as high wind speed, low temperature, and heavy snowfall, It has the effect of reducing the formation of ice and icicles.

Embodiment 1 FIG.
1 is a front view showing a surveillance camera apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a side sectional view showing the surveillance camera apparatus according to Embodiment 1 of the present invention.
3, 4 and 5 are explanatory views for explaining the effect of the surveillance camera device according to the first embodiment of the present invention.
In the figure, a camera case 1 is a box that houses a surveillance camera 4 and protects the surveillance camera 4 from the outdoor environment.
The camera case 1 is supported by a case drive mechanism 21 as shown in FIG. 13, and the installation angle of the camera case 1 is set by rotating the camera case 1 in the horizontal axis direction or the vertical axis direction. Can be changed.
The front panel 2 is attached to the front opening of the camera case 1 and has an opening 2a at the center.

The translucent body 3 is attached to the opening 2 a of the front panel 2.
The defroster 3a, which is a resistor that can be energized, is attached to the inner surface of the translucent body 3 and generates heat when energized to melt snow or snow attached to the surface of the translucent body 3, or Remove surface fogging.
The surveillance camera 4 is a photographing device that takes light from the opening 2a of the front panel 2 to photograph a surveillance area and outputs an image of the surveillance area.
The lens 4 a of the monitoring camera 4 is installed at a position where light enters from the opening 2 a of the front panel 2.

The panel heating unit 5 is a heating element that is mainly mounted around the translucent body 3, generates heat when energized, and melts snow and ice adhering to the surface of the front panel 2.
The wiper device 6 includes a wiper blade 6a and a drive unit 6b. The drive unit 6b slides the wiper blade 6a on the outer surface of the translucent body 3 to adhere to the outer surface of the translucent body 3. Remove snow and ice, water drops and dust.
The defroster temperature sensor 7a is attached to the inner surface of the front panel 2. When the outside air temperature falls below the reference temperature A, the defroster 3a is energized. When the outside air temperature rises above the reference temperature B, the defroster 3a is energized. To do.
The panel heating unit temperature sensor 7b is attached to the inner surface of the front panel 2. When the outside air temperature falls below the reference temperature C (first reference temperature), the panel heating unit 5 is energized, and the outside air temperature is the reference temperature D (first temperature). When the temperature rises above the reference temperature (2), energization control for stopping energization of the panel heating unit 5 is performed.

The silicone rubber film 8 that is a sheet member is attached around the camera case 1 so as to cover the front panel 2 and is deformed when subjected to wind pressure, or is deformed by the weight of a deposit such as snow and ice 10 or by its own weight. The attached snow and ice 10 is peeled off and removed, and the attached rainwater is removed.
An opening 8 a is provided at the center of the silicone rubber film 8, and a drain port 8 b of the silicone rubber film 8 drains snow and ice and water droplets that have entered from the opening 8 a of the silicone rubber film 8.
In addition, 9 is a visual field range of the surveillance camera 4, and 10 is snow and ice adhering to the surveillance camera device.

Next, the operation will be described.
The surveillance camera device is installed, for example, at a predetermined outdoor location, and the surveillance camera 4 in the camera case 1 always photographs a surveillance area such as a river or a road through the translucent body 3.
The monitoring camera 4 in the camera case 1 transmits the video of the monitoring area to a monitor (not shown) installed in the management room, for example, and displays the video of the monitoring area on the monitor.

The defroster temperature sensor 7a measures the outside air temperature and energizes the defroster 3a when the outside air temperature falls below the reference temperature A.
When the defroster 3 a is energized by the defroster temperature sensor 7 a, the defroster 3 a generates heat and removes snow melting of the snow / ice 10 adhering to the surface of the translucent body 3 and clouding of the surface of the translucent body 3.
The panel heating unit temperature sensor 7b also measures the outside air temperature, and energizes the panel heating unit 5 when the outside air temperature falls below the reference temperature C.
When the panel heating unit 5 is energized by the panel heating unit temperature sensor 7b, the panel heating unit 5 generates heat and melts snow and ice 10 adhering to the surface of the front panel 2.

When snow and ice 10, water droplets, dust, or the like adheres to the outer surface of the transparent body 3, the drive unit 6b of the wiper device 6 slides the wiper blade 6a on the outer surface of the transparent body 3, thereby Snow and ice 10, water droplets and dust adhering to the outer surface of the light body 3 are removed.
Note that the wiper device 6 is usually controlled by an external controller (not shown) when a monitor watching the above-described monitor deteriorates the image quality of the video.

As described above, when the defroster 3a and the panel heating unit 5 generate heat, the snow and ice 10 adhering to the surfaces of the light transmitting body 3 and the front panel 2 can be melted, and the wiper blade 6a of the wiper device 6 can be removed. When slid, the snow and ice 10 and water droplets adhering to the outer surface of the translucent body 3 can be removed.
However, in an environment where the wind speed is high, the temperature is low, or the amount of snowfall is large, the amount of heat taken by the outside air or snow ice 10 exceeds the amount of heat generated by the defroster 3a or the panel heating unit 5 and snow melting may not be possible. In such a case, the field of view of the monitoring camera 4 may be narrowed due to the attachment of snow and ice 10 on the transparent body 3 and the front panel 2.
In addition, when snow and ice 10 adheres to a location that does not receive heat from the defroster 3a or the panel heating unit 5 (for example, the wiper device 6), the snow and ice 10 will not peel off unless the environment recovers to 0 degrees Celsius or higher. The visual field of the monitoring camera 4 may become narrow.
In order to reduce the adhesion of snow and ice 10 on the front panel and the wiper even in an environment where the wind speed is high, the temperature is low, or the amount of snowfall is large, A silicone rubber film 8 is attached around the camera case 1 so as to cover the front panel 2.

Hereinafter, an operation of the silicone rubber film 8 attached around the camera case 1 so as to cover the front panel 2 will be described.
Under the environment where the snow and ice 10 is blown, if the silicone rubber film 8 is not attached, the snow and ice 10 is blown to the front panel 2 and the translucent body 3, but if the silicone rubber film 8 is attached, the snow and ice 10 The silicone rubber film 8 is sprayed.
However, since the silicone rubber film 8 has the following characteristics, when it receives wind pressure, it deforms and vibrates, and the attached snow and ice 10 can be peeled off and removed.
Further, when snow or ice 10 or the like adheres, the attached snow or ice 10 can be peeled and removed by being deformed by its own weight.

  Silicone rubber, which is a material of the silicone rubber film 8, has a feature that it has a high surface tension along with fluororesin and is difficult to adhere to snow and ice. In addition, since silicone rubber is highly flexible, when a hard object such as ice is peeled off, the entire surface does not need to be peeled off at once, and peels sequentially from the weakest part. For this reason, it has the characteristics that the peak of force required for peeling is very small and the resistance is very good. Moreover, the hardness change at a low temperature is small, and it has a feature that can be virtually ignored up to -30 degrees Celsius.

Here, FIG. 3 shows a state in which the adhered snow ice 10 is peeled and removed by the silicone rubber film 8 being deformed and vibrated by the wind pressure. In addition, since the snow ice 10 is removed by peeling, the formation of ice and icicles hardly occurs.
In the case of the silicone rubber film 8, the difficulty of attaching the snow ice 10 does not depend on the environment such as high wind speed, low air temperature, and a large amount of snowfall.
Since the silicone rubber film 8 requires less force to peel off the snow and ice 10 than the metal front panel of the conventional surveillance camera device, even if the snow and ice 10 adheres, the snow and ice 10 grows and icicles are generated. Before being applied, it can be peeled off by its own weight.
As the adhering snow and ice 10 becomes larger, the peeling force increases, so that stable operation is possible (see FIG. 4).

  When the amount of snow and ice 10 attached is small and the snow and ice 10 does not peel off due to its own weight, the case drive mechanism 21 rotates the camera case 1 in the vertical axis direction as shown in FIG. If the installation angle of the camera case 1 is changed so that the part faces downward, the snow and ice 10 can be peeled off.

  As is apparent from the above, according to the first embodiment, the silicone rubber film 8 that deforms and vibrates when receiving wind pressure is attached around the camera case 1 that houses the surveillance camera 4 that captures the surveillance area. As a result, it is possible to reduce the adhesion of snow and ice 10 on the front panel 2 and the wiper device 6 even in an environment where the wind speed is high, the temperature is low, or the amount of snowfall is large, and the generation of ice and icicles is reduced. The effect which can be done is produced.

Embodiment 2. FIG.
6 is a front view showing a surveillance camera apparatus according to Embodiment 2 of the present invention, and FIG. 7 is a side sectional view showing the surveillance camera apparatus according to Embodiment 2 of the present invention.
3 and FIG. 4, the same reference numerals as those in FIG. 1 and FIG.
The metal frame 11 is vulcanized and bonded to the silicone rubber film 8, and acts so that vibrations due to wind reception of the silicone rubber film 8 are uniformly dispersed throughout the silicone rubber film 8.

Next, the operation will be described.
The upper part of the silicone rubber film 8 is less subject to vibration due to wind reception than the lower part of the silicone rubber film 8 having the drainage port 8b.
However, when the metal frame 11 is vulcanized and bonded to the silicone rubber film 8, the metal frame 11 uniformly distributes large vibrations in the lower part of the silicone rubber film 8 throughout the silicone rubber film 8.
For this reason, in the surveillance camera device of the second embodiment, it is possible to reliably prevent snow and ice from adhering to the upper part of the silicone rubber film 8 as compared with the surveillance camera device of the first embodiment.
In addition, the silicone rubber film 8 alone cannot maintain the shape of the opening 8a due to elastic deformation of the silicone rubber film 8, but the silicone rubber film 8 is bonded to the silicone rubber film 8 by vulcanization. It is possible to prevent the silicone rubber film 8 from entering the visual field range 9 while maintaining the shape of the eight opening portions 8a.

Embodiment 3 FIG.
FIG. 8 is a front view showing a surveillance camera apparatus according to Embodiment 3 of the present invention. In the figure, the same reference numerals as those in FIG.
The metal frames 11a and 11b are vulcanized and bonded to the silicone rubber film 8, and act so that vibrations due to wind reception of the silicone rubber film 8 are uniformly dispersed throughout the silicone rubber film 8.
The metal frames 11a and 11b are obtained by dividing the metal frame 11 of FIG. 6 into two.

In the second embodiment, the metal frame 11 is vulcanized and bonded to the silicone rubber film 8 to uniformly disperse the vibration of the silicone rubber film 8. However, as shown in FIG. The metal frames 11a and 11b divided into two may be vulcanized and bonded to the silicone rubber film 8.
By dividing the metal frame 11 into two parts, the silicone rubber film 8 is vibrated more greatly than in the second embodiment, so that the effect of preventing snow and ice adhesion can be enhanced.

Embodiment 4 FIG.
9 is a front view showing a surveillance camera apparatus according to Embodiment 4 of the present invention, and FIG. 10 is a side sectional view showing the surveillance camera apparatus according to Embodiment 4 of the present invention.
9 and 10, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts, and thus description thereof is omitted.
In Embodiment 1 described above, the panel heating unit 5 is attached around the translucent body 3, but the panel heating unit 5 may be omitted instead of mounting the silicone rubber film 8. .
In this case, although it becomes impossible to melt the snow and ice 10 adhering to the surface of the front panel 2, since the silicone rubber film 8 is mounted, adhesion of the snow and ice 10 can be reduced.
Further, by omitting the panel heating unit 5, it is possible to reduce the size and power consumption of the surveillance camera device.

Embodiment 5 FIG.
FIG. 11 is a front view showing a surveillance camera apparatus according to Embodiment 5 of the present invention, and FIG. 12 is a side sectional view showing the surveillance camera apparatus according to Embodiment 5 of the present invention.
11 and 12, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts, and thus the description thereof is omitted.
The bimetal 12 is made of two different kinds of metals and is attached so as to be in close contact with the silicone rubber film 8. The bimetal 12 is a member that is deformed by heat when the panel heating unit 5 generates heat and rises in temperature, and returns to its original shape when the panel heating unit 5 stops generating heat and the temperature decreases.

In the first to fourth embodiments, the silicone rubber film 8 is deformed and vibrated when it receives wind pressure. However, the bimetal 12 may be pressed to deform the silicone rubber film 8.
Specifically, it is as follows.

As described above, the panel heating unit temperature sensor 7b measures the outside air temperature. When the outside air temperature falls below the reference temperature C, which is the first reference temperature, the panel heating unit 5 is energized, and the outside air temperature is the second temperature. When the temperature rises above the reference temperature D, which is the reference temperature, the energization control for stopping the energization of the panel heating unit 5 is performed.
Accordingly, when the outside air temperature falls below the reference temperature C, the panel heating unit 5 is energized by the panel heating part temperature sensor 7b to generate heat, and when the outside air temperature rises above the reference temperature D, the panel heating part temperature sensor 7b The energization is released and heat generation is stopped.

When the panel heating unit 5 generates heat and the temperature rises, the bimetal 12 is deformed by the heat, so that the silicone rubber film 8 that is in close contact is pressed and deformed.
On the other hand, when the panel heating unit 5 stops generating heat and the temperature is lowered, the shape of the silicone rubber film 8 that is in close contact also returns to its original shape.
By providing the bimetal 12 on the silicone rubber film 8, the silicone rubber film 8 is deformed according to changes in the outside air temperature. Therefore, even in an environment where the wind is weak, the snow / ice 10 due to the deformation of the silicone rubber film 8 is deformed. Peeling can be performed.

It is a front view which shows the surveillance camera apparatus by Embodiment 1 of this invention. It is side surface sectional drawing which shows the surveillance camera apparatus by Embodiment 1 of this invention. It is explanatory drawing explaining the effect of the surveillance camera apparatus by Embodiment 1 of this invention. It is explanatory drawing explaining the effect of the surveillance camera apparatus by Embodiment 1 of this invention. It is explanatory drawing explaining the effect of the surveillance camera apparatus by Embodiment 1 of this invention. It is a front view which shows the surveillance camera apparatus by Embodiment 2 of this invention. It is side surface sectional drawing which shows the surveillance camera apparatus by Embodiment 2 of this invention. It is a front view which shows the surveillance camera apparatus by Embodiment 3 of this invention. It is a front view which shows the surveillance camera apparatus by Embodiment 4 of this invention. It is side surface sectional drawing which shows the surveillance camera apparatus by Embodiment 4 of this invention. It is a front view which shows the surveillance camera apparatus by Embodiment 5 of this invention. It is side surface sectional drawing which shows the surveillance camera apparatus by Embodiment 5 of this invention. It is explanatory drawing which shows the monitoring camera apparatus with which the case drive mechanism is attached.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Camera case, 2 Front panel, 2a Opening part, 3 Light transmitting body, 3a Defroster, 4 Surveillance camera, 4a Lens, 5 Panel heating part (heating element), 6 Wiper device, 6a Wiper blade, 6b Drive part, 7a Defroster Temperature sensor, 7b Temperature sensor for panel heating unit, 8 Silicone rubber film (sheet member), 8a Opening, 8b Drain port, 9 Field of view of surveillance camera, 10 Snow ice, 11 Metal frame, 11a, 11b Metal frame, 12 Bimetal, 21 case drive mechanism.

Claims (8)

By photographing a monitoring area, and monitoring camera that outputs an image of the monitoring area, and housing the surveillance camera, a camera case that have the openings in the shooting direction of the camera, so as to cover the opening of the camera case And a seat member that is deformed and vibrates when subjected to wind pressure. By photographing a monitoring area, and monitoring camera that outputs an image of the monitoring area, and housing the surveillance camera, a camera case that have the openings in the shooting direction of the camera, so as to cover the opening of the camera case And a sheet member that is deformed by the weight of the attached matter.   The surveillance camera device according to claim 1 or 2, wherein the sheet member is a silicone rubber film.   The surveillance camera device according to any one of claims 1 to 3, further comprising a case drive mechanism that changes an installation angle of the camera case.   4. The surveillance camera device according to claim 3, wherein the metal frame is vulcanized and bonded to the silicone rubber film.   6. The surveillance camera device according to claim 5, wherein the metal frame is divided. A heating element that generates heat when the outside temperature falls below the first reference temperature, and stops heating when the outside temperature rises above the second reference temperature;
The surveillance camera according to any one of claims 1 to 6, further comprising a bimetal that is in close contact with the sheet member and deforms as the temperature rises or falls due to the heating element. apparatus.   The surveillance camera device according to claim 1, wherein the sheet member has an opening in a photographing direction of the surveillance camera.

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