JPH06334568A - Catv repeater and water infiltration detecting method therefor - Google Patents

Abstract

PURPOSE:To detect rainwater, which enters the repeater due to an equipment defect or construction defect, with high accuracy of preventive action by using economical constituent elements. CONSTITUTION:This repeater has a resistance variable water infiltration detector 6 which serves as a continuous electromagnetic shield function in the matching surfaces 1a and 2a of a housing 1 and a lid 2 and inside and adjacently to a waterproof gasket 3 and a monitor part 7 which detects variation in the resistance of the water infiltration detector 6, converts the variation into water infiltration information, and transfers it to a sensor through an up line.

Description

Detailed Description of the Invention

[0001]

[Industrial application] CATV repeaters installed on outdoor poles, etc.
The present invention relates to a CATV repeater that highly accurately detects rainwater that has infiltrated the interior of the container, and a method for detecting water immersion thereof.

[0002]

2. Description of the Related Art A conventional CATV repeater comprises a variable resistance humidity sensor installed in the repeater for outputting a humidity signal according to humidity, a reference signal generator for outputting a reference signal, a humidity signal and a reference signal. It has 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 it to a sensor for centralized monitoring. .

A method of detecting water intrusion in a CATV repeater is to install a humidity sensor at a specific location inside the repeater housing.
It was detected after rainwater flowed into the repeater housing.
(For example, Japanese Utility Model Publication No. 63-23837, Japanese Utility Model Publication No. 64)
(See JP-A-33236 and JP-A-62-75457)

In the conventional method for detecting inundation, the humidity sensor cannot detect unless water is stored at a specific position in the repeater to some extent. Therefore, there is a problem that reliable preventive maintenance information cannot be obtained.

Therefore, an object of the present invention is to detect rainwater, which has been flooded into the container due to defective equipment or defective construction, as an economical component with high preventive detection accuracy.
An object of the present invention is to provide a repeater and a method for detecting water infiltration.

[0005]

According to the present invention, a housing having an opening on one surface, a lid body that opensably and closably faces the one surface and covers the opening, a mating surface of the one surface, and the mating surface. In a CATV repeater including a waterproof packing provided on at least one of the mating surfaces of the lid body facing each other, the CATV repeater is adjacent to the inside of the waterproof packing, and at least one of the mating surfaces. A coaxial water intrusion detector having an electromagnetic shield function provided on the mating surfaces is provided, and the water infiltration detector is interposed between the outer conductor and the inner conductor, the outer conductor and the inner conductor, and dries when moisture adheres. A CATV repeater is obtained, characterized in that it has a water-permeable insulator that changes the resistance value between the outer conductor and the inner conductor, as compared to the time.

Further, according to the present invention, there is provided a CATV repeater having a monitoring unit for detecting change information of the resistance value of the water immersion detector and converting it into water immersion information.

Further, according to the present invention, a casing having an opening on one surface thereof, a lid body that opens and closes on the one surface, covers the opening, the mating surface of the one surface, and the mating surface facing the mating surface. A CATV repeater including a waterproof packing provided on at least one of the mating surfaces of the lid body, the CATV repeater being adjacent to the inside of the waterproof packing and provided on at least one of the mating surfaces of the mating surfaces. And a coaxial water immersion detector having an electromagnetic shield function, wherein the water intrusion detector is interposed between the outer conductor and the inner conductor, and the outer conductor and the inner conductor, and is compared with the one when the water is attached and when the water is attached. It has a water-permeable insulator that changes the resistance value between the outer conductor and the inner conductor, and when moisture adheres to the water intrusion detector, the change information of the resistance value of the water intrusion detector is displayed by the monitoring unit. Flood Into a multi-address, detecting water method CATV repeater, characterized in that the transfer to the sensor via an uplink is obtained.

[0008]

According to the structure of the present invention, the water intrusion detector is interposed between the outer conductor and the inner conductor and between the outer conductor and the inner conductor,
Also, the water-permeable insulator has a resistance value between the outer conductor and the inner conductor that is different from that when the water is attached when the water is attached. The resistance change information is converted into flooding information and transferred to the sensor via the upstream line.

[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 has a housing 1 having an opening 1b on one surface thereof, a cover 2 facing the one surface openably and closably and covering the opening 1b, and a surface of the housing 1. The surface 1a and the waterproof packing 3 annularly provided on at least one mating surface 1a of the mating surfaces 2a of the lid body 2 facing the mating surface 1a.

On the mating surface 2a of the lid body 2, a coaxial water immersion detector 6 is provided. The water immersion detector 6 has an electromagnetic shield function, and the lid 2 is attached to the mating surface 1a of the housing 1.
When the mating surfaces 2a are aligned, they are located around the inside of the waterproof packing 3.

The housing 1 basically has a waterproof function against the outside, and normally rainwater does not flow into the inside of the waterproof packing 3. When the waterproof packing 3 is defective or construction work for fastening the housing 1 and the lid 2 is defective, rainwater may come into contact with the water intrusion detector 6 only when a gap is generated.

FIG. 3 shows an example of the structure of the water immersion detector 6. The water immersion detector 6 includes an outer conductor 4, an inner conductor 5, and an outer conductor 4.
And a water-permeable insulator 8 which is interposed between the inner conductor 5 and changes the resistance value between the outer conductor 4 and the inner conductor 5 when moisture is attached as compared with when dried. Furthermore, the lid 2
A monitoring unit 7 that detects a change in the resistance value of the water immersion detector 6 is attached to the inner surface of the. The monitoring unit 7 is attached to the inside of the water immersion detector 6 which is annularly provided on the mating surface 2b 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 to function as an electromagnetic shield inside and outside the housing 1, while the insulator 8 absorbs paper. The water attached to the outer conductor 4 by using the 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 intrusion detection body 6 before it flows into the inside of the housing 1 (equipment portion). The insulation resistance of No. 5 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 outer conductor potential of the water 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
Input to the negative terminal of 4.

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 the data processing unit (hereinafter, 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 modulator / demodulator 16 and the information is output. Forward.

In the operating state shown in FIG. 4, since the water intrusion detector 6 is normally dry, the inner conductor 5 becomes the outer conductor 4.
Because of the insulation state, the voltage is almost + 5V. Comparator 1
Comparator 1 if the positive terminal of 4 is set to about + 2.5V
The output of 4 becomes Low level, and the CPU 15 is programmed so as to judge that it is 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 of the insulator 8 of the flooding 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 2.5 V or less, the output of the comparator 15 becomes High level at this time, the CPU 15 judges that it is abnormal, and the data thereof is modulated / demodulated. After being converted into an RF signal by 16, it is transferred as abnormal information to the sensor via the uplink.

[0020]

As described in detail above, the C of the present invention
According to the ATV repeater and its water infiltration detection method, since the water intrusion detector is provided on the mating surface, rainwater and the like generated from the gap between the housing and the lid due to defective waterproof packing or installation work. Can be quickly and surely detected before contacting the internal electronic device, so that highly reliable preventive maintenance information can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an 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 immersion detector of FIG.

FIG. 4 is a block diagram showing an embodiment of a water immersion detection circuit of the CATV repeater of the present invention.

[Explanation of symbols]

 1 Case 2 Lid 3 Waterproof Packing 4 Outer Conductor 5 Inner Conductor 6 Electromagnetic Shielded Wire / Water Intrusion Detector 7 Monitoring Section 8 Water Permeable Insulator 9 Case Earth 10 Vcc + 5V Power Supply Terminal 11 Pull-up Resistance 12, 13 Reference Voltage Resistance Device 14 Comparator 15 Data processing unit (CPU) 16 Modulator / demodulator 17 Output terminal

Claims (3)

[Claims] 1. A housing having an opening on one surface, a lid body that opensably and closably faces the one surface and covers the opening, a mating surface of the one surface, and a mating surface of the lid body facing the mating surface. In a CATV repeater including a waterproof packing provided on at least one of the mating surfaces, an electromagnetic shield function is provided adjacent to the inside of the waterproof packing and provided on at least one of the mating surfaces. A coaxial water immersion detector is provided, wherein the water immersion detector is interposed between an outer conductor and an inner conductor, and the outer conductor and the inner conductor, and the outer conductor and the inner conductor are compared with each other when water is attached and when the outer conductor is dried. A CATV repeater comprising: a water-permeable insulator that changes a resistance value between conductors. 2. The CATV repeater according to claim 1, further comprising a monitoring unit for detecting change information of the resistance value of the water immersion detector and converting the information into water immersion information. 3. A housing having an opening on one surface, a lid body that opensably and closably faces the one surface and covers the opening, a mating surface of the one surface, and a mating surface of the lid body that faces the mating surface. In a CATV repeater including a waterproof packing provided on at least one of the mating surfaces, an electromagnetic shield function is provided adjacent to the inside of the waterproof packing and provided on at least one of the mating surfaces. A coaxial water immersion detection body is provided, wherein the water immersion detection body is interposed between an outer conductor and an inner conductor, and the outer conductor and the inner conductor, and the outer conductor and the inner conductor are compared with each other when water is attached and when the body is dried. With a water-permeable insulator to change the resistance value between, when the water adheres to the water intrusion detector, to convert the change information of the resistance value of the water intrusion detector by the monitoring unit to water infiltration information, Upstream line A method for detecting water intrusion in a CATV repeater, which is characterized in that the data is transferred to a sensor via a cable.