JP2509878Y2 - Core contrast device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a core wire for contrasting the core wire of a line when laying a telephone line or various control lines connecting between devices in, for example, a telemeter that monitors a plurality of slave station devices and a master station device. Regarding the control device.

[0002]

2. Description of the Related Art For example, as shown in FIG. 7, when a plurality of lines (for example, 4 wires (4 W)) are used to monitor a plurality of slave station devices 2 with a master station device 1, a master station device is used. 1 and each slave station device 2 are connected by a cable 3. When constructing such a monitoring system, first, the master station device 1
The cable 3 is laid after the slave station device 2 is installed in the predetermined area. Therefore, when connecting the cable 3 to each of the devices 1 and 2, of course, each core point which connects the cable 3 confirms which signal is the core wire through which each signal flows. There is a need.

However, in general, when laying a telephone line or various control lines, it is common to use a cable formed by twisting a large number of core wires in order to prevent crosstalk from the induction line. Target. For example,
Crosstalk occurs when the two lines are parallel. Therefore, if a twisted wire that crosses the middle of one line is used, the direction of the current flowing through the adjacent line is reversed in the middle, so that the crosstalk is reduced. When four lines are used, the core wire in the same quad, which further crosses the above-mentioned twist wire, is used.

In such a cable having a complicated structure, it is extremely complicated to compare which core wire each of the core wires viewed from one end corresponds to when viewed from the other end.

A conventional control method will be described with reference to FIG.
That is, the master station device side and the slave station device side are connected by a dedicated telephone line 4, and further a dedicated common line 5 is laid. Then, on the slave station device side, the common ground wire 5 and each core wire La, Lb, Lc, Ld are sequentially short-circuited using the short-circuit wire 7. On the other hand, on the master station device side, using the tester 6 and the like, the common ground wire 5 and the core wires L1, L2 of the cable 3 are used.
L3. The conduction between L4 is examined in order. Then, the core wire on the master station device side and the core wire on the slave station device side at the time when the continuity is confirmed correspond to each other.

However, according to the method shown in FIG. 8, workers are required on both the master station device side and the slave station device side. Further, a dedicated telephone line 4 for the workers to contact each other is required, and a dedicated common line 5 is also required. When these dedicated lines 4 and 5 are used, the master station device 1 and the slave station device 2
If the distance between the cable and the cable becomes long, not only the efficiency of laying work will decrease, but also the cost for laying the dedicated lines 4 and 5 will increase.

Therefore, as shown in FIG. 9, it has been proposed to provide a signal transmitting device 8 on the master station device side and remove the above-mentioned dedicated lines 4 and 5. In the signal transmitter 8, different signals S are provided between the cores L1 and L2 and L3 and L4.
Signal generators 9a and 9b that output A and SB are connected, and a DC power supply 10 is further inserted between one of the core wires L1 and L3 and the ground. That is, a DC bias is applied to each core wire L1, L3.

Then, the slave station device side searches for a combination of core lines La, Lb, Lc and Ld from which the signals SA and SB are output, using the oscilloscope 11 or the like. When the combination is detected, each core wire La, Lb, L is detected using the tester 12.
Check the potential of c and Ld with respect to the ground. Therefore, the correspondence between the core lines L1 to L4 on the master station device side and the core lines La to Ld on the slave station device side is determined from the relationship between the type of signal and the potential with respect to the ground. In such a core wire comparison device, once the signal transmission device 8 is connected to each core wire L1 to L4 of the cable 3 on the master station device side, no worker is required on the master station device side. Therefore, the actual reference work of the core wire can be performed by only one worker on the slave station device side.

[0009]

However, the core wire contrast apparatus shown in FIG. 9 still has the following problems.

That is, there are many combinations of connections on the slave station device side. For example, when the four core wires shown in FIG. 9 are compared, there are 6 combinations (4 × 3/2 = 6). Therefore, the work efficiency of the core wire control is significantly reduced. Moreover, since the number of core wires of the cable 3 is usually enormous, it is actually difficult to perform the core wire comparison work using this core wire comparison device.

Further, since it is necessary to measure the potential of each core line La to Ld with respect to the ground, it is difficult to measure the potential with respect to the ground when the slave station device 2 is installed in, for example, the upper floor of a building. There are also problems. That is, the installation location of the monitored control 2 to which the cable 3 for the core wire comparison is connected is limited.

The present invention has been made in view of such circumstances, and by sending a signal corresponding to each core wire between the control core wire and each of the remaining core wires short-circuited to each other,
Provided is a core wire comparison device capable of easily performing a core wire comparison work between both ends of a cable without laying a dedicated wire between one end side and the other end side of the cable, even if the number of core wires is large. The purpose is to do.

[0013]

In order to solve the above-mentioned problems, in a core wire contrast device of the present invention, a cable having a plurality of core wires twisted together is provided with a transmitter at one end and a receiver at the other end. It is arranged.

Then, a plurality of transmission terminals to which each core wire at one end of the cable is connected, a signal generation circuit for outputting a different signal for each core wire, and the signal generation circuit and each transmission terminal are connected to the transmission unit. The signal generation circuit is connected by interposing the specified control core wire among the plurality of core wires connected to each transmission terminal to one terminal of the output of the signal generation circuit and shorting all other core wires to each other. A switching circuit connected to the other terminal of the output of the control signal and a specified command of the contrast core wire are sent to this switching circuit, and an output command of the signal corresponding to the concerned contrast core wire is sent to the signal generation circuit in synchronization with the sending of the specified command. It incorporates a switching control unit for sending out.

On the other hand, in the receiving section, a plurality of receiving terminals to which each core wire at the other end of the cable is connected, a signal detecting circuit for detecting each signal received through each receiving terminal, and this signal detecting circuit. And a signal feedback circuit for feeding back the signal passing through to all the terminals other than the terminal to which the detected signal is connected.

[0016]

According to the core wire contrast device thus constructed,
In the transmission unit, when the switching control unit designates, for example, one core wire as the control core wire, the switching core connects the specified core wire to one terminal of the output of the signal generating circuit, and all the core wires other than the designated core wire are connected. It is short-circuited and connected to the other terminal of the output of the signal generating circuit. At the same time, the core control signal is input from the switching control unit to the signal generating circuit. The signal generating circuit sends a signal corresponding to the designated core wire between the output terminals. In the receiving section, the signal detection circuit detects the signal of each core wire. In this case, the wires corresponding to the common wire 5 in FIG. 8 and the ground wire in FIG. 9 correspond to all short-circuited core wires other than the designated core wire. Therefore, a signal that identifies the core specified by the transmitter appears on the core of the receiver that corresponds to the core specified by the transmitter, and it becomes clear which core of the receiver corresponds to the core of the transmitter. To do.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a core wire contrast device of the embodiment. In this example,
A core wire comparison device used when a plurality of slave station devices 2 are connected to the master station device 1 shown in FIG.

This core wire checking device is roughly divided into a transmitting section 13 connected to the master station device 1 side of the cable 3 shown in FIG.
a and the receiver 1 connected to the slave station device 2 side of the cable 3.
3b and. Further, the transmission unit 13a includes the core wires L1. L
Four transmission terminals 14a, 1 to which 2, L3 and L4 are connected
4b, 14c, 14d, switching circuit 15 and signal generation circuit 1
6 and a switching control unit 17.

The signal generating circuit 16 includes the core wires L1 and L.
Four types of signals S1, S2, S corresponding to 2, L3, L4
It has the function of outputting S3 and S4. Specifically, as shown in the time chart of FIG. 2, the number of pulses output within the specified period T1 is changed to 1 to 4. And 4
Which signal of the signals S1 to S4 of the type is to be output between the terminals A and B is determined by the switching control unit 17 by the specified period T1.
According to the core wire designation signal a input every time. The terminal A is on the positive side and the terminal B is on the negative side.

The switching circuit 15 is composed of an analog switch, and each transmission terminal 14a connected to the input terminal.
14d are switched and connected to the respective terminals A and B of the signal generating circuit 16 in accordance with the core wire designation signal a from the switching control section 17. For example, when the core designation signal a designating the core L1 is input from the switching control unit 17, as shown in FIG.
4a is connected to the positive terminal A of the signal generating circuit 16, and all other unspecified cores L2, L3. L4 is short-circuited and connected to the negative terminal B of the signal generating circuit 16. Further, when the core specifying signal a for specifying the core L2 is input from the switching control unit 17, the core L
2 is connected to the terminal A of the signal generating circuit 16 and the other core wires L1, L3 and L4 are short-circuited to the terminal B of the signal generating circuit 16.
Connect to. In this way, only the core wire designated by the switching control unit 17 is connected to the terminal A of the signal generating circuit 16, and all the other core wires are short-circuited and connected to the terminal B of the signal generating circuit 16.

The switching control unit 17 is composed of a kind of microcomputer, and sends out different core wire designation signals a to the signal generating circuit 16 and the switching circuit 15 each time a prescribed period T1 elapses, and four core wires L1. ~ L4 are specified in order. Therefore, the cycle T0 in which one core wire is designated is four times as long as the specified cycle T1 (T0 = 4T1).

Therefore, the cable 3 is transmitted from the transmitter 13a.
The signals S1, S2, S3 and S4 sent to the core lines L1 to L4 at the end of the master station device 1 have a cycle T0 and a prescribed cycle T1 with respect to each other, as shown in the time chart of FIG.
The signals S1 to S4 do not overlap with each other by shifting each other.

The receiving section 13b has receiving terminals 18a-1-18.
8d, a signal detection circuit 19a, and a signal feedback circuit 19b. That is, the core wires La, Lb, Lc, and Ld of the cable 3 on the side of the slave station device 2 are respectively connected to the reception terminals 18
It is connected to a, 18b, 18c and 18d. Each of the reception terminals 18a to 18d is connected to the signal detection circuit 19a. The signal that has passed through the signal detection circuit 19a is input to the signal feedback circuit 19b.

The receiver 13b is specifically constructed as shown in FIG. That is, the reception terminal 18a of the core wire La is connected to the LED of the illustrated polarity via the resistor 20a.
It is connected to the anode of (light emitting diode) 21a. The cathode of the LED 21a is connected to the receiving terminals 18b, 18 of the cores Lb, Lc, Ld via the diodes 22a, 23a, 24a having the illustrated polarities.
c, 18d.

Similarly, the receiving terminal 18b of the core wire Lb is connected to the anode of the LED 21b via the resistor 20b. The cathode of the LED 21b passes through the diodes 22b, 23b, 24b, and the respective core wires L
It is connected to the receiving terminals 18a, 18c, and 18d of a, Lc, and Ld.

The receiving terminal 18c of the core wire Lc has a resistor 2
0c is connected to the anode of the LED 21c. The cathode of the LED 21c passes through the diodes 22c, 23c, and 24c, and the core L
It is connected to the receiving terminals 18a, 18b, and 18d of a, Lb, and Ld.

Further, the receiving terminal 18d of the core wire Ld is connected to the anode of the LED 21d via the resistor 20d. The cathode of the LED 21d is connected to the respective core wires L via the diodes 22d, 23d and 24d.
It is connected to the receiving terminals 18a, 18b, and 18c of a, Lb, and Lc.

Therefore, the resistors 20a to 20d and the LEDs 21a to 21d are connected to the receiving terminals 18a to 18d, respectively.
A signal detection circuit 19a for detecting the signals received via the respective diodes is configured, and each of the diodes 22a to 22d, 23a is formed.
23d and 24a to 24d are LEDs 21a to 21d, respectively.
And a signal feedback circuit 19b for feeding back a signal that has passed through the signal detection circuit 19a to all terminals other than the terminal to which the detected signal is connected.

Next, the operation of the thus configured core wire comparison device will be described.

First, the core wires L1 to L4 at the end of the cable 3 on the side of the master station device 1 are connected to the transmission terminals 14a to 14 of the transmitter 13a.
Connect to d. At the same time, the core wires La to Ld at the end of the cable 3 on the side of the slave station device 2 are connected to the reception terminals 18a to 18a of the reception unit 13b.
Connect to 18d. Then, when the power of the signal generating circuit 16, the switching circuit 15, and the switching control unit 17 of the transmission unit 13a is turned on, the switching control unit 17 changes the designated core line every specified cycle T ₁ as shown in FIG. a is sent to the signal generating circuit 16 and the switching circuit 15. Therefore, as described above, each transmission terminal 14a of the transmission unit 13a is
From 14d to signals S1 to S4 for the cores L1 to L4.
Is sent.

On the side of the receiver 13b, the switching controller 17
In the cycle T1 in which the core wire designation signal a for selecting the core wire L1 is from the terminal A of the signal generation circuit 16a to the transmission terminal 1
The signal S1 identifying the core L1 sent to the core L1 via 4a is input to one of the four reception terminals 18a to 18d. For example, when the signal S1 is input to the receiving terminal 18b, the signal S1 is transmitted to the resistor 20.
b, passing through the LED 21b. Then, the signal S1 passing through the LED passes through the diodes 22b, 23b, 23b and the receiving terminals 18a, 18c, 18d, and the core wire La,
Input to Lc and Ld. These core wires La, Lc, Ld
The signal S1 input to is transmitted to the terminal B of the signal generation circuit 16 by being short-circuited in the switching circuit 15 of the transmitter 13a.

Therefore, a current path for returning from the terminal A to the terminal B is formed. Therefore, the signal S1 is sent to the LED 21b.
Current flows. As a result, the second LED 21b
Is lit once every period T _{0 has} elapsed. Therefore, it can be confirmed that the core L1 of the transmitter 13a corresponds to the core Lb of the receiver 13b.

Similarly, the leading LED 21a of the receiver 13b has a cycle T at a cycle in which the switching controller 17 specifies the core L2.
If the light is turned on twice each time ₀ elapses, the core line L of the transmitter 13a is
It can be confirmed that 2 corresponds to the core wire La of the receiving unit 13b.

In this way, each LED 21 of the receiver 13b is
By monitoring the lighting states of a to 21d, it is possible to immediately grasp which core lines La1 to L4 on the receiving unit 13b side correspond to which core lines L1 to L4 on the transmitting unit 13a side.

Therefore, the dedicated telephone line 4 and the common ground line 5 are not required unlike the conventional method shown in FIG. Further, unlike the core wire comparison device shown in FIG. 9, it is not necessary to manually change the connection on the receiving side many times. Therefore,
The work efficiency of core wire contrast work is greatly improved. Moreover, since it is not necessary to lay the dedicated lines 4 and 5, the facility cost is significantly reduced.

Further, since the ground wire shown in FIG. 9 is unnecessary, it can be applied to the cable 3 for connecting the control device 1 and the controlled device 2 installed at any place.

The receiving terminals 18a to 18d are provided with La to L.
If at least two core wires of d are connected, the receiving unit 13
In b, one is the signal receiving line and the other is the signal feedback line,
A power supply path from the terminal A to the terminal B can be formed, and the corresponding core wire can be identified. Accordingly, even if cores other than La to Ld are mixed in the receiving unit 13b, the cores can be easily collated, and the receiving terminals 18a to 18d are L-shaped.
When the core wires other than a to Ld are connected, the corresponding LEDs other than the receiving unit 13b to which they are connected are not lit, so that the line mixed wires other than La to Ld can also be detected.

FIG. 4 is a circuit diagram showing a main part of a receiving part 13b of a core wire checking device according to another embodiment of the present invention. The transmitter 13a is the same as that in the embodiment of FIG.

In this embodiment, the LED 21 of FIG.
A counter 25 and a display 26 are provided instead of a.
The counter 25 is reset every time the specified period T1 has elapsed. The other LEDs 21b, 21c, 21d are also replaced with a counter and a display, respectively.

According to this embodiment, the counter 25 counts the number of pulses of each of the signals S1 to S4 input from the transmitter 13a to the receiver 13b via the cores of the cable 3 to display 26. Display to. Therefore, the display 2
The count value displayed in 6 is the core lines L1 to L of the transmission side as they are.
The number is 4. Therefore, the core wire comparison work can be performed more easily.

FIG. 5 shows a signal generation circuit 16 of the transmitter 13a in a core wire checking apparatus according to another embodiment of the present invention.
From the signals S1 to S4 corresponding to the core wires L1 to L4
It is a figure which shows the waveform of S4. That is, each of the signals S1 to S
4, the pulse width TP is changed. In this embodiment, for each core wire L1, L2, L3, L4, 1 ms,
It is set to 2ms, 3ms, and 4ms. And the receiving unit 1
On the 3b side, the signal type is determined by the length of the lighting time of each of the LEDs 21a to 21d. Even with such a configuration, it is possible to obtain substantially the same effect as that of the above-described embodiment.

FIG. 6 is a diagram showing signals S1 to S4 corresponding to core lines L1 to L4 output from the signal generating circuit 16 of the transmitter 13a according to still another embodiment of the present invention.
In the apparatus of this embodiment, the signals S1 to S4 output in each cycle T1 are set to signals having different frequencies.

Then, on the side of the receiver 13b, for example, a frequency counter or the like is used to detect each frequency of the input signal.
Therefore, it is possible to obtain substantially the same effect as that of the embodiment described above.

The present invention is not limited to the above embodiments. For example, the transmission unit 13a may be connected to the slave station device 2 side and the reception unit 13b may be connected to the master station device 1 side. Further, in the embodiment, the case where the number of core wires is four has been described, but the number of core wires is not limited to four, and the cable 3
It may be changed according to the number of core wires of.

[0046]

As described above, according to the core wire contrast apparatus of the present invention, a signal corresponding to each core wire is sent between the control core wire and each of the remaining core wires short-circuited to each other, and the signal is received at the receiving side. It receives a signal and compares which core wire on the transmitting side the core wire received corresponds to. Therefore, it is possible to easily perform the work of checking the core wire between both ends of the cable without laying a dedicated wire between one end side and the other end side of the cable and even if the number of core wires is large.

When a line not connected to the transmitter is mixedly connected to the receiver, if at least two lines connected to the transmitter are connected to the receiver, the line from the transmitter is transmitted. By detecting a line that cannot detect a signal, the corresponding line can be found as a mixed connection line.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a core wire comparison device according to an embodiment of the present invention;

FIG. 2 is a time chart showing the operation of the transmission section of the apparatus of the embodiment,

FIG. 3 is a circuit diagram of a receiver of the apparatus of the embodiment,

FIG. 4 is a partial circuit diagram showing an essential part of a core wire checking device according to another embodiment of the present invention;

FIG. 5 is a signal waveform diagram of a core wire contrast device according to another embodiment of the present invention;

FIG. 6 is a signal waveform diagram of a core wire contrast device according to still another embodiment of the present invention;

FIG. 7 is a block diagram showing a general monitoring system,

FIG. 8 is a connection diagram in a conventional core wire comparison method,

FIG. 9 is a view showing an operation procedure of the conventional core wire comparison method.

[Explanation of symbols]

1 ... Master station device, 2 ... Slave station device, 3 ... Cable, 13a ...
Transmitting unit, 13b ... Receiving unit, 14a to 14d ... Transmitting terminal,
15 ... Switching circuit, 16 ... Signal generating circuit, 17 ... Switching control section, 18a-18d ... Reception terminal, 19a ... Signal detecting circuit, 19b ... Signal feedback circuit.

Claims (1)

(57) [Scope of utility model registration request] 1. A cable formed by twisting a plurality of core wires together.
(3) In the core wire comparison device that compares which core wire (L1 to L4) viewed from one end corresponds to which core wire (La to Ld) when viewed from the other end, each of the one end of the cable. A plurality of transmission terminals (14a ~ 14d) to which the core wire is connected, and a signal generation circuit (16) that outputs different signals (S1 to S4) for each core wire, and this signal generation circuit and each of the transmission terminals. The specified control core wire among a plurality of core wires connected to each of the transmission terminals is connected to one terminal of the output of the signal generating circuit, and all other core wires are short-circuited to each other, and A switching circuit (15) connected to the other terminal of the output of the signal generating circuit, and a specified command of the control core wire is sent to this switching circuit, and the corresponding core wire is sent to the signal generation circuit in synchronization with the sending of the specified command. A transmission unit (13a) including a switching control unit (17) that outputs a corresponding signal output command. ) And a plurality of receiving terminals (18a ~
18d), a signal detection circuit (19a) that detects each signal received through each reception terminal, and all signals other than the terminal to which the detected signal that has passed through this signal detection circuit is connected. Signal feedback circuit (19b) for feedback to the terminal
A core wire contrast device having a receiving section (13b) consisting of