JP2826440B2 - CATV repeater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] For CATV repeaters installed on outdoor poles, etc., due to poor construction or equipment failure,
The present invention relates to a CATV repeater for detecting rainwater inundated in a vessel with an economical component with high accuracy and a method for detecting inundation thereof.

[0002]

2. Description of the Related Art A conventional CATV repeater is comprised of a resistance variable humidity sensor installed in the repeater and outputting a humidity signal corresponding to humidity, a reference signal generator for outputting a reference signal, a humidity signal and a reference signal. A comparator that inputs a signal and outputs state information; a comparator that outputs state information; and a data processing unit that converts the state information into a state data signal and outputs the state data signal to a sensor for centralized monitoring. .

[0003] In the method of detecting inundation of a CATV repeater, a humidity sensor is attached to a specific location inside the repeater housing.
Rainwater was detected after flowing into the repeater housing.
(For example, Japanese Utility Model Application Laid-Open No. 63-23837, Japanese Utility Model Application Laid-Open No. 64
(See JP-A-33236 and JP-A-62-75457.)

In the conventional flood detection method, the humidity sensor cannot detect the water unless a certain amount of water is stored at a specific position in the repeater. Therefore, there is a problem that reliable preventive maintenance information cannot be obtained.

[0004] Therefore, an object of the present invention is to provide a CATV for detecting rainwater that has been flooded in a vessel due to equipment failure or construction failure with economical components and highly accurate preventive measures.
It is an object of the present invention to provide a repeater and a method for detecting flooding thereof.

[0005]

SUMMARY OF THE INVENTION A CATV repeater according to the present invention .
It includes a lid for covering the open opposite vital the opening to the one side and the housing having an opening on one side, the mating surfaces and this one face
Have a waterproof packing provided on at least one mating surface of the mating surface of the lid facing the mating surface of the
You. And next to the inside of the waterproof packing and
Provided on at least one of the mating surfaces of the surfaces repeater
Equipped with a coaxial immersion detector that functions as an outer electromagnetic shield, the immersion detector is interposed between the outer conductor and the inner conductor, and is interposed between the outer conductor and the inner conductor , and compared with the outer conductor when dry when moisture adheres. and a water-permeable insulator to change the resistance value between the internal conductor, the detecting water body in the cover body
Monitoring unit that detects resistance change information and converts it to flooding information
Is attached .

Further, the CATV repeater of the present invention comprises a monitoring unit
We There characterized in that attached to the inner surface of the lid
You.

[0007] CATV repeater of the present invention also includes a lid for covering the open openably facing the one surface and the housing having an opening on one side, facing the mating surface and the mating surface of one surface
And a waterproof packing provided on at least one mating surface of the mating surface of the lid. Then, the inside of the waterproof packing is provided on at least one of the mating surfaces of the adjacent vital respective mating surfaces repeater inside and outside of the electromagnetic shield
Functions as comprising a coaxial detecting water body, detecting water
Body, and the outer conductor and the inner conductor, the outer conductor and inner conductor
It is interposed between the body and the outside compared to dry during water adhesion
A water permeable insulator that changes the resistance value between the conductor and the inner conductor , and when water adheres to the water immersion detector, the monitoring unit attached to the inner surface of the lid body detects the water immersion detector. The resistance change information is converted to flood information and sent via the upstream line.
Data transfer means for transferring data to
You.

[0008]

According to the structure of the present invention, the inundation detector is interposed between the outer conductor and the inner conductor, and between the outer conductor and the inner conductor,
And having a water-permeable insulator to change the resistance value between the comparison outer conductor and the inner conductor when dry when moisture adheres, when moisture is adhered to the detecting water body, flooding detection by the monitoring unit
The change information of the resistance value of the sensing object is converted into the flood information and transmitted to the center via the uplink.

[0009]

1 and 2 show an embodiment of a CATV repeater according to the present invention.

Referring to FIGS. 1 and 2, a CATV repeater includes a housing 1 having an opening 1b on one surface thereof, a cover 2 opposing the one surface so as to be openable and closable, and covering the opening 1b. A waterproof packing 3 is provided on at least one of the mating surfaces 1a of the mating surface 2a of the lid 2 facing the mating surface 1a.

On the mating surface 2a of the lid 2, a coaxial immersion detector 6 is provided. The immersion detector 6 has an electromagnetic shielding function, and is provided on the mating surface 1 a of the housing 1 with the lid 2.
Are located around the inside of the waterproof packing 3 when the mating surfaces 2a are mated.

The housing 1 basically has a waterproof function against the outside, and normally, rainwater does not flow inside the waterproof packing 3. If the waterproof packing 3 is defective, or the work for tightening the housing 1 and the lid 2 is defective, rainwater may come into contact with the flood detecting body 6 only when a gap is generated.

FIG. 3 shows an example of the structure of the immersion detector 6. The inundation detector 6 includes the outer conductor 4, the inner conductor 5, and the outer conductor 4.
And a water-permeable insulator 8 that is interposed between the inner conductors 5 and that changes the resistance between the outer conductor 4 and the inner conductor 5 as compared with the time of drying when moisture adheres. Furthermore, lid 2
A monitoring unit 7 for detecting a change in the resistance value of the water immersion detector 6 is attached to the inner surface of the sensor. The monitoring unit 7 is attached to the inside of the immersion detector 6 provided in an annular shape on the mating surface 2 b of the lid 2.

The outer conductor 4 is in the form of a braid with a gap, and is always in contact with the housing ground in the mounted state, and functions as an electromagnetic shield between the inside and the outside of the housing 1. The water adhering to the outer conductor 4 by using a material or the like passes through the braid of the outer conductor and immediately reaches the inner conductor 5.

Therefore, the water such as rainwater that has passed through the waterproof packing 3 comes into contact with the water infiltration detector 6 just before flowing into the inside of the housing 1 (equipment unit). 5, the insulation resistance decreases rapidly.

FIG. 4 shows a block diagram of the monitoring unit 7 which detects the change in the resistance value and converts it into information. The external conductor potential of the immersion detector 6 is always fixed to the ground potential 9 which is the potential of the housing 1. The potential of the internal conductor 5 is pulled up from the pull-up resistor 11 at the Vcc + 5V terminal 10 and the comparator 1
4 is input to the minus terminal.

On the other hand, the reference voltage resistors 12 and 13 are for setting the reference voltage of the comparator 14. The output of the comparator 14 is input to a data processing unit (hereinafter referred to as CPU) 15, and the output data of the data processing unit 15 is output to the output terminal 17 of the monitoring unit 7 connected to the uplink via the modem 16 and outputs the information. Forward.

In the operation state shown in FIG. 4, the normal state is that the inundation detector 6 is dry.
+ 5V due to the insulation state. Comparator 1
4 is set to about + 2.5V, the comparator 1
The output of No. 4 becomes Low level, and the CPU 15 is programmed to determine this as normal.

At the time of flooding, since the outer conductor 4 and the inner conductor 5 are electrically coupled with a finite resistance via the moisture in the insulator 8 of the flood detector 6, the potential of the inner conductor 5 becomes lower than + 5V. . If the value of the resistor 11 and its bias voltage are set in advance so as to be equal to or less than 2.5 V, the output of the comparator 15 becomes High level, the CPU 15 determines that there is an abnormality, and outputs the data to the modem. After conversion into an RF signal by 16, the signal is transferred as abnormal information to the center via the uplink.

[0020]

As described in detail above, the C of the present invention
According to the ATV repeater and the waterlogging detection method, since the waterlogging detector is provided on the mating surface, rainwater or the like generated from a gap between the housing and the lid due to a defective packing box or installation work is prevented. In addition, since the detection can be performed quickly and reliably before contacting the internal electronic equipment, highly reliable preventive maintenance information can be obtained. Also, open the monitoring unit
Since it is attached to the lid that covers the mouth, the volume inside the housing is sufficient.
Can be used for installation,
Easy maintenance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a CATV repeater of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is an external perspective view showing the water intrusion detector of FIG. 1;

FIG. 4 is a block diagram showing an embodiment of a flood detection circuit of the CATV repeater according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Lid 3 Waterproof packing 4 External conductor 5 Inner conductor 6 Electromagnetic shield wire combined immersion detector 7 Monitoring part 8 Water permeable insulator 9 Housing ground 10 Vcc + 5V power supply terminal 11 Pull-up resistance 12, 13 Reference voltage resistance Unit 14 comparator (comparator) 15 data processing unit (CPU) 16 modem 17 output terminal

Claims (3)

(57) [Claims] A housing having an opening on one surface, a lid facing the one surface so as to be openable and closable, and covering the opening; a mating surface of the one surface; and a mating surface of the lid facing the mating surface. A CATV repeater including a waterproof packing provided on at least one of the mating surfaces, wherein a repeater is provided adjacent to the inside of the waterproof packing and provided on the mating surface of at least one of the mating surfaces .
It is provided with a coaxial water-immersion detector functioning as an outer electromagnetic shield, wherein the water-immersion detector is interposed between the outer conductor and the inner conductor, and between the outer conductor and the inner conductor, and is compared when drying when moisture adheres. A water-permeable insulator for changing a resistance value between the outer conductor and the inner conductor, wherein the lid detects the change information of the resistance value of the flood detector and converts the information into flood information. CATV relay, characterized in that the monitoring unit is attached. 2. The CATV repeater according to claim 1, wherein the monitoring unit is attached to an inner surface of the lid. 3. A housing having an opening on one surface, a lid facing the one surface so as to be openable and closable, and covering the opening; and a mating surface of the one surface and a mating surface of the lid facing the mating surface. A CATV repeater including a waterproof packing provided on at least one of the mating surfaces, wherein the inside of the repeater is provided adjacent to the inside of the waterproof packing and provided on at least one of the mating surfaces .
It is provided with a coaxial water-immersion detector functioning as an outer electromagnetic shield, wherein the water-immersion detector is interposed between the outer conductor and the inner conductor, and between the outer conductor and the inner conductor, and is compared when drying when moisture adheres. A water permeable insulator that changes a resistance value between the outer conductor and the inner conductor; and when a water adheres to the immersion detector, the water immersion is performed by a monitoring unit attached to an inner surface of the lid. It converts the change information in the resistance of the sensing element to flooding information, Sen via the uplink
CAT, characterized in that it comprises a transfer means for transferring the data
V repeater .