JP2755759B2 - Cord detector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [Industrial application field] The present invention relates to a core detector for identifying a corresponding cable core at both ends or one end of a communication cable.

[Prior Art] Conventionally, in connection and wiring work of a communication cable, the seventh method is used.
As shown in the figure, a head-type connection is made to the connection terminals Ta, Tb at one end of the communication cores La, Lb, which are first determined by the call control personnel waiting at one end of the cable line CL (generally, at the exchange). Connect the connecting ends of the lead wires 52, 53 of the line test handset 51, put the head spring 54 on the head, put the transmitter 55 facing the mouth, put the receiver 56 on the ear, and connect the connection terminal Ta of the connecting core La. On the other hand, a field worker arriving at the other end of the cable line CL at the other end of the cable line CL is connected to the lead wire 60, 61 of the head type line test handset 59 by connecting the lead wire 58 connecting end of the transmitter 57 which emits an audible signal to the lead wire 58. Connect the connection end to the connection terminal T at the other end
c, Td, and put the head spring 62 on the head
While talking with the call control personnel via the telephone cords La and Lb using the telephone receiver and the receiver 64, the call control personnel connects the search connector 66 of the lead wire 65 of the transmitter 57, and the field worker connects the communication core Lb. The search connector 68 of the search lead wire 67, one end of which is connected to the terminal Tb, is connected to each of the connection terminals T3, T3 'of any of the cores L3 from the core L1 to the connection terminals T3, T3' of the Ln group, and is energized mutually to perform field work. Personnel confirmed the audible signal and contrasted line by line.

[Problems to be Solved by the Invention] In the above-described conventional cable core contrast method, even if a small pair of cable cores is compared, a connection line between an indoor worker and an outdoor worker is created and the outdoor worker is placed on the site. The disadvantage is that a long waiting time of the indoor worker while moving is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a core detector that does not require the creation of a communication line when a specific cable core of multiple communication cables is checked and does not require an indoor worker.

[Means for Solving the Problems] A core wire comparator according to the present invention includes two pairs of cores of the communication cable connected to a signal transmission terminal, each pair of which has a voltage difference. A signal transmitting device for transmitting a DC pulse voltage having a voltage value that does not impair the connected gas sensor and the telephone line; and a direct current from two of the two pairs of cores connected to a signal receiving terminal. In response to the pulse voltage, a signal reception indicating which of the two sets of DC pulse voltages having the voltage difference the DC pulse voltage transmitted to the two core wires has and the polarity of the DC pulse voltage. Device.

[Operation] If the signal receiving terminal of the signal receiving device is connected to two of the two pairs of the core wires of the communication cable, the DC pulse voltage transmitted to the two core wires causes the two sets of DC of the signal transmitting device to be connected. Since the polarity is displayed according to which of the pulse voltages, there is no need to provide a communication line between the place where the signal sending device is installed and the place where the signal receiving device is installed. There is no need for an indoor worker to be on standby until moving, and the DC pulse voltage sent to the core is a value that does not interfere with the gas sensor and telephone line. Even if a gas sensor is connected, the core can be compared without any trouble.

Example Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of a core comparator of the present invention, FIG. 2 is a perspective view showing connection of the core comparator of FIG. 1 to a communication cable core, and FIG. FIG. 4 is a view for explaining a first example of use of the core detector of FIG. 1, and FIG. 4 is a view for explaining a second example of use of the core detector of FIG.

The core controller comprises a signal transmitting device 1 and a signal receiving device 14. The signal transmitting device 1 includes a power switch 2, red lamps 3, 4, yellow lamps 5, 6, an adjustment knob 7, a test switch 8, and a signal transmitting device. Terminals 9, 10, 11, 12, transformers 100, 101, stabilized power supply circuits 102, 103, 104, flicker circuit 105, and relay 10.
The signal receiving device 14 includes a green lamp 15 and a red lamp 16
And yellow lamp 17 and confirmation switch 18 and normal control confirmation buzzer
19 and signal receiving terminals 21 and 22 are provided. In the signal transmitting device 1, the stabilized power supply circuits 102 and 103 are connected to the secondary side of the transformer 100, the stabilized power supply circuit 104 is connected to the secondary side of the transformer 101, the plug is connected to the commercial power supply, and the power switch is connected. 2 is turned on, the stabilized power supply circuits 102, 103 and 104
3V, 4.5V, and 6V DC voltages are output to the output side of the switch, respectively. The flicker circuit 105 receives the output voltage of the stabilized power supply circuit 104 and switches the contacts of the relay 106 on and off according to the flicker frequency adjusted by the adjustment knob 7. Red lamps 3 and 4 by light emitting diodes are resistors (400 ohm and 200 ohm) at the output side of the stabilized power supply circuits 102 and 103, respectively.
And the red lamps 3 and 4 are turned on when the power switch 2 is turned on. On the + side of the outputs of the stabilized power supply circuits 102 and 103, yellow lamps 5 and 6 formed of light emitting diodes are connected in series with the contact of the relay 106 to send a signal to the signal sending terminal 9.
And 11 respectively, and one side is directly connected to the signal sending terminal 10
12 connected to each. Contact points of the test switch 8 are inserted between the signal transmitting terminals 9 and 10 and 11 and 12 in series with a resistance of 500 ohms respectively. When the test switch 8 is pressed, the DC pulse current due to the intermittent contact of the relay 106 causes yellow. The lamps 5 and 6 blink so that the DC pulse voltage can be confirmed. In the signal receiving device 14, a yellow lamp 17 in which two light emitting diodes are connected in series in the same direction is connected in parallel with a normal control confirmation buzzer 19 between the clip type signal receiving terminals 21 and 22. The green lamp 15 and the red lamp 16 by the light emitting diode are connected in parallel in opposite directions to each other in series with the normally closed contact 28 of the switch 18, and the direction of the green lamp 15 is the same as that of the yellow lamp 17. I have. The normal control confirmation buzzer 19 is a buzzer that sounds when the polarity of the input is matched.
And 22 are connected to the two conductors to be compared, respectively, depending on whether the normal control confirmation buzzer 19 sounds and the green lamp 15 lights or the buzzer 19 does not sound and the red lamp 16 lights. The direction of the polarity of the DC pulse voltage sent from the signal sending device 1 supplied to the controller can be determined.
The yellow lamp 17 is in series and does not turn on unless a relatively high voltage is applied. When the green lamp 15 is on, press the confirmation switch 18 to disconnect the green lamp 15 and red lamp 16. When the yellow lamp 17 is turned on, it is understood that the DC pulse voltage transmitted to the two cores is 4.5 V on the output side, and when not turned on, it is 3 V on the output side. The DC pulse voltage sent to the core of the communication cable by this core controller is 4.5V or 3V, so no special trouble is caused even if a gas sensor is connected to the core, and other cores are not affected. Has no effect.

 Next, an example of use of the cord detector will be described.

The example shown in FIG. 2 and FIG. 3 is a case in which a pressure transmitter (gas sensor) is attached to a specified core wire in a manhole to all cables in an area in an unmanned telephone exchange. is there. The signal transmission device 1 is installed indoors where cables are concentrated and a pulse voltage transmission terminal
Wires 9 to be compared between 9,10,11,12 and control cable 23
4, 25, 26, 27 are sequentially connected with a transmission cord 13 for sending a pulse voltage to a cable, a power switch 2 is turned on, and a yellow lamp 5, 5
Check that 6 flashes. As described above, the installation of the signal transmission device 1 as the work on the indoor side is completed.

In order to confirm the control core wire, it is necessary to attach a sensor. At the manhole where the target cable passes, the quad of the core wire that seems to be applicable (a set of two pairs of core wires is bundled) And select two quads at clip terminals 21 and 22 at the end of the receiving code 20 of the signal receiving device 14.
Insert the core of the book. As a result, as shown in FIG. 3 (a), if the core wire is connected, the signal
Only the green lamp 15 of the signal receiving device 14 blinks in accordance with the pulse signal due to the low voltage 3V applied between L1 and L2.
Even if 18 is pressed, the yellow lamp 17 does not emit light, so that it is confirmed that the core held by the clip is the core # 1 from which a low-voltage (3 V) DC pulse voltage is transmitted.

If the yellow lamp 17 blinks by the same operation, the core wire to which the high potential (4.5 V) voltage is applied as shown in FIG.
It turns out that 2 has been grasped normally.

At this time, if the green lamp 15 and the yellow lamp 17 do not light up and the red lamp 16 blinks, as shown in FIG.
The opposite voltage is applied between L2 and L of the control core wire
It can be seen that 1, L2 and the code destination clips L1, L2 are interchanged. FIG. 3 (b) shows a case where the # 1 core is confirmed in reverse, while FIG. 3 (d) shows a case where the # 2 core is confirmed in reverse, and both are connected in reverse. However, since the control core wire has been found, the core wire can be accurately confirmed by the above operation by re-gripping the clip normally.

If the core wire is erroneously grasped as shown in FIG. 3 (e), none of the lamps of the signal receiving device 14 is turned on.

Using this cord detector, the task of confirming the cord to be compared could be easily performed in a manhole approximately 2 km away from the indoor where the signal transmission device 1 was installed. In addition, a clear lamp display was obtained even in a manhole farther away using a prototype of a signal receiving device with a built-in battery despite a voltage drop. This prototype also operates normally when a 2000 ohm resistor is inserted between the prototype and the signal transmission device 1. Considering that the line resistance from the telephone exchange to the farthest subscriber is defined as 1500 ohms by NTT, it was confirmed that it can be used at virtually any point within the area of one telephone exchange. Also, it has been confirmed that the pressure transmitter mounted on the control core has no effect because the voltage and current of the transmission signal are both low. As a result, there is no need for an indoor worker, and there is no need to connect and create a communication line and a control line, and the work method has been greatly improved.

The example shown in FIG. 4 was used for the construction of a "meeting line" to be provided on an NTT wiring cable. The "consultation line" is the core wire used for the line for communication between the exchange and the outdoor workers when performing new telephone construction, etc., and is commonly connected for all wiring cables in one section. is there.

FIG. 4 shows a core (usually one cable) used as a "meeting line" in the exchange as in the example shown in FIG.
The signal is transmitted to the first core line of the cable from the low voltage side terminals 9 and 10 of the signal transmission device 1 to the first line. The outdoor worker applies the clip signal receiving terminals 21 and 22 of the signal receiving device 14 to the first line of the main overhead cable 44 connected to the underground cable 43 at the point A, and uses the first line to which the signal is sent by the lamp display. Make sure there is.

Next, among the 200 pairs of core wires 44 of the confirmed wiring cable,
100 pairs of the branch wiring cables 46 connected from the 1st to the 100th and 100 pairs of the main wiring cables 45 connected from the 101st to the 200th, respectively. Multi-connect the 1st wire of the main wiring cable 44. Then, the user moved to the point B and connected at the point A. The 1st wire of the 100-pair overhead wiring cable 45 was confirmed by the signal receiving device 14, and the confirmed wiring cable was confirmed in the same manner as at the point A.
50 connected from No. 1 to No. 50 out of 45 100 twin wires
A multi-connection of the first main wire 47 of the pair of main wiring cables 45 and the 50 main wiring cables 45 of the signal transmission device side identified as the first of the 50 pairs of branch wiring cables 48 connected from the 51st to the 100th, respectively. .

In this way, at the point where the cable branches and the point where the logarithm is reduced, the same operation as at the points A and B is performed on the signal transmitting device 1 while confirming the signal of the signal transmitting device 1 using the signal receiving device 14. A “meeting line” can be created by sequentially performing the process from the closest place. The advantage of this method is that, as in the example of FIG.
In addition to the fact that the time required for control is short, the subscriber uses the core wire between the exchange and the telephone subscriber to communicate with the exchange side workers when there is no existing meeting line by the conventional method. It is possible to avoid the inconvenience and inconvenience of using the mobile phone as a meeting while the phone is not in use.

FIG. 5 is a block diagram of a second embodiment of the core detector of the present invention, and FIG. 6 is a perspective view of the core detector of FIG.

This cord detector comprises a signal transmitting device 31 and a signal receiving device 32. As shown in FIGS. 5 (a) and 6 (a), the signal transmission device 31 includes a power switch 33, an indicator lamp 34, a test switch 35, an adjustment knob 36, a transformer 201,
202, 203, control power supply circuit 204, high-voltage power supply circuit 205, low-voltage power supply circuit 206, oscillation circuit 207, transistor on / off circuits 208, 209, 210, rectifiers 211, 212, and signal transmission terminal 213,
When the power switch 33 is turned on, the oscillating wave voltage generated by the oscillation circuit 207 is superimposed on the output voltage of the high-voltage power circuit 205 and the output voltage of the low-voltage power circuit 206 via the transistor on / off circuits 208 and 209, 210, respectively. After being rectified by the rectifiers 211 and 212, the signal
And 214, a high-voltage DC pulse voltage is transmitted between the signal transmission terminals 215 and 216, and a low-voltage DC pulse voltage is transmitted between the signal transmission terminals 215 and 216. The blinking of the lamp 34 enables confirmation of the high-voltage DC pulse voltage and the low-voltage DC pulse voltage. Signal transmission terminals 213, 214, 215, 216 are connected to the core of the communication cable by a transmission cord 38. The signal receiving device 32 includes a power switch 37 and indicator lamps 39, 4
0,41,42, signal receiving terminals 221,222, high resistance 223,224, piezoelectric buzzer oscillation circuit 225, reference voltage generation circuit 226, high voltage positive connection input level judgment circuit 227, low voltage positive connection input level judgment circuit 228, high voltage Reverse connection input level determination circuit 229, low voltage reverse connection input level determination circuit 230, and display switching circuits 231, 2
32, a buzzer-on circuit 233, a piezoelectric buzzer 234, a display buffer 235, 236, 237, 238, a high voltage positive connection LED display 239, a low voltage positive connection LED display 240, a high voltage reverse connection LED display 241 and a low voltage reverse connection LED display 242. I have. Signal receiving terminals 212,222
When the power switch 37 is turned on by connecting to the core wire to be compared, the DC pulse voltage input from the signal receiving terminals 212 and 222 through the high resistances 232 and 234 is applied to the high voltage reference power source generated from the reference voltage generation circuit 226 and Low voltage reference voltage and high voltage positive connection input level determination circuit 227, low voltage positive connection input level determination circuit 228, high voltage reverse connection input level determination circuit 2
29, the low voltage reverse connection is compared by the input level determination circuit 230, and by the operation of each input level determination circuit 227, 228, 229, 230 and the display switching circuit 231, 232, the polarity of the input DC pulse voltage is positive connection, and if the voltage is high, the high voltage positive Connection LED
The display lamp 39 is lit by the display 239, and if the voltage is low, the display lamp 40 is lit by the low voltage positive connection LED display 240, and the piezoelectric buzzer 234 is sounded by the power supply of the piezoelectric buzzer oscillation circuit 225 via the buzzer ON circuit 233. I do.
At this time, the polarity of the input DC pulse voltage is reverse connection. If the voltage is high, the display lamp 41 is turned on by the high voltage reverse connection LED display 241.
The display lamp 42 is turned on by the LED display 242.

In the signal receiving device of the core comparator, the difference between the high voltage and the low voltage of the input DC pulse voltage is not detected by the voltage drop due to the serial connection of the light emitting diodes as in the core comparator of FIG. Since a level determining circuit is provided and the display lamp is turned on by the display switching circuit, the determination is easy to understand, and the difference between the high voltage and the low voltage is clearly displayed by one operation. In addition, since a high resistance is inserted between the signal receiving terminals of the signal receiving device, it was tested that even if it was incorrectly connected to a cable used for personal computer communication or data line, it would not affect the line. Confirmed by

[Effects of the Invention] As described above, the present invention provides two sets of gas sensors having a voltage difference between two pairs of cores of a communication cable from a signal transmitting device and a DC having a voltage value that does not cause a problem to a telephone line. A pulse voltage is transmitted, and the signal receiving device receives a DC pulse voltage transmitted to two core wires of the two pairs of the core wires, and is any one of the two sets of DC pulse voltages having the voltage difference. And the polarity display, eliminating the need to create extra connecting lines for cable control work.
Since the conductor can be compared at one end on the outdoor side, there is no need to wait for indoor workers.The work place and work time can be freely selected only by the outdoor work group, and the signal receiving device is small and portable. Since no extra tools are required, the number of people required indoors can be reduced, work time can be reduced,
Since it does not interfere with the gas sensor and the telephone line, it is possible to efficiently perform cable core switching, new data circuit creation, and optical fiber intervening pair connection points, etc. effective.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of a core comparator of the present invention, FIG. 2 is a perspective view showing connection of the core comparator of FIG. 1 to a communication cable core, and FIG. FIG. 1 is a diagram illustrating a first example of use of the core detector of FIG. 1, FIG. 4 is a diagram illustrating a second example of use of the core comparator of FIG. 1, and FIG. FIG. 6 is a block diagram of a second embodiment of the wire contrast device, FIG. 6 is a perspective view of the wire contrast device of FIG. 5, and FIG. 7 is a diagram showing a conventional wire contrast operation. 1,31 ... Signal transmission device, 2,33,37 ... Power switch, 3,4 ... Red lamp (power), 5,6 ... Yellow lamp (pulse confirmation), 7,36 ... Adjustment knob, 8,35 …… Test switch, 9,10,11,12,213,214,215,216 …… Signal sending terminal, 13,38… Transmission code, 14,32… Signal receiving device, 15… Green lamp (normal check), 16 …… Red lamp (reverse connection confirmation), 17… Yellow lamp (for confirmation), 18 …… Confirmation switch, 19 …… Normal control confirmation buzzer, 20 …… Reception code, 21,22,221,222 …… Signal reception terminal , 23… Cable containing control core, 24… ♯1 L1 core, 25… ♯1 L2 core, 26… ♯2 L1 core, 27… 272 L2 core of wire, 28… Contact of confirmation switch 18, 34,39,40,41,42 …… Indicator lamp, 43 …… 200 to underground cable, 44 …… 200 to main line overhead wiring cable, 45 …… 100 pairs of overhead wiring cable, 46 …… 100 pair branch wiring cable, 47… 50 pair wiring cable, 48… 50 pair wiring cable, 100,101… transformer, 102,103,104 …… stabilized power supply circuit, 105 …… flicker circuit, 106 …… relay, 201,202,203… ... Transformer, 204 ... Control power circuit, 205 ... High voltage power circuit, 206 ... Low voltage power circuit, 207 ... Oscillator circuit, 208,209,210 ... Transistor on / off circuit, 211,212 ... Rectifier, 217,218 ... Test Switch contact, 223,224… High resistance, 225… Oscillation circuit for piezoelectric buzzer, 226… Reference voltage generation circuit, 227… High voltage positive connection input level judgment circuit, 228 …… Low voltage positive connection input level judgment circuit, 229: High-voltage reverse connection input level judgment circuit, 230: Low-voltage reverse connection input level judgment circuit, 231,232: Display switching circuit, 233: Buzzer-on circuit, 234: Piezoelectric buzzer, 235,236,237,238: Display bar 239 …… High voltage positive connection LED display, 240 …… Low voltage positive connection LED display, 241 …… High voltage reverse connection LED display, 242 …… Low voltage reverse connection LED display.

Claims (1)

(57) [Claims] 1. A core comparator for identifying a corresponding cable core at both ends or at one end of a communication cable, comprising two pairs of cores of the communication cable connected to a signal transmission terminal. A signal transmitting device for transmitting a DC pulse voltage having a voltage value that does not interfere with the gas sensor and the telephone line connected to the core wire, and a signal transmitting device connected to the signal receiving terminal. Receiving a DC pulse voltage from two of the two pairs of cores, the DC pulse voltage sent to the two cores is any one of the two sets of DC pulse voltages having the voltage difference. And a signal receiver for indicating the polarity of the DC pulse voltage.