JPS5932933B2 - Communication equipment monitoring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring method for monitoring monitored information (analog amount) of each part of a communication device.

Communication equipment consists of multiple units of different types, and when this equipment is in use, monitored information (hereinafter referred to as information) such as voltage and current of each part is periodically checked to see if it is operating normally. It is necessary to constantly monitor how much the value has changed from the previously recorded value.

On the other hand, in recent years, as the parts used have become smaller and more sophisticated, communication devices have become smaller and more sophisticated, and the number of items to be monitored has also tended to increase.

In response to this trend, the conventional method of connecting all information transmission lines to a monitoring device, selecting the necessary information using a switching mechanism, and displaying it on a meter or other device for monitoring, does not allow the information to enter the monitoring device. As the number of transmission lines increases, the number of connector terminals that receive these lines increases, the bundle of wires inside the monitoring device also becomes thicker, and a special switching mechanism may be required to switch a large number of items. It was hot. For this reason, it takes a lot of man-hours to manufacture the monitoring device, and when a fault such as a break in the internal wiring occurs, it takes a considerable amount of time to recover, depending on the location of the fault. SUMMARY OF THE INVENTION An object of the present invention is to provide a monitoring system that accommodates all the monitoring items necessary for the operation of a communication device and that is easy to manufacture and maintain.

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment.

That is, the communication device is composed of a plurality of units 1 having various functions, and the information necessary to determine the operating status of these units is shared through the electronic switching circuit 2 contained in each unit 1. The user is guided through a line 3 to an item selection switch 5 included in a monitoring device 4, and by switching the switch, desired information is displayed on a meter or the like. Since the common line 3 passes information about only one unit, the unit selection switch 6 in the monitoring device 4 controls the electronic switching circuit 2 to select only the desired unit. If you want to monitor the information on unit A now, switch the unit selection switch 6 in the monitoring device 4 to WW unit A? 10) When in the position, the switching circuit control voltage 7 of the monitoring device 4 is set to unit A.
is added to the electronic switching circuit 2, and this circuit becomes in the state of 1f closed 11.

Since the switching circuit control voltage 7 is not applied to the electronic switching circuit 2 in other units, this circuit is 1q open! 5
The state remains as follows, and the common line 3 transmits information only for unit A. In other words, unit selection switch 6
As a result, a plurality of units 1 use the common line 3 in a time-division manner, and information from other units is not transmitted simultaneously. Therefore, the information of the unit A is transmitted through the common line 3 to the item selection switch 5, where it is individually switched to cause, for example, a meter to move, thereby making it possible to monitor the operating status of a desired part. The number of common lines 3 may be equal to the maximum number of transmission lines sent out by each unit 1.

By switching the information sent from the unit using two types of switches in this manner, the number of lines going in and out of the monitoring device 4 can be greatly reduced.

For example, if information 5 is sent from each of 10 units, the information will be as follows. FIG. 2 is a block diagram showing the circuit configuration of one embodiment of the electronic switching circuit 2 described above.

That is, information from each unit 1 is output to the outside of the unit through a circuit in which an operational amplifier 10 and a diode 11 are connected in series. Note that a power supply control circuit 8 is connected to the operational amplifier 10 in order to electronically open and close this circuit.
Now, the switching circuit control voltage is applied to the input terminal 9 of the power supply control circuit 8 of unit A, which is selected by the unit selection switch 6.

For example, the voltage at the input terminal 9 changes from 0V to +1V. As a result, the power supply control circuit 8 becomes 11 on 15, voltage Vcc is applied to the operational amplifier 10, and the operational amplifier 10 operates normally. Therefore, information indicating the operating state of unit A (for example, a voltage of about 0 to +5 V, mostly direct current) is transmitted to the outside of unit A through an operational amplifier 10 and a diode 11. Next, when the unit selection switch 6 selects a unit other than unit A, the switching circuit control voltage applied to the input terminal 9 becomes 1f off V1.

Therefore, the voltage applied to the input terminal 9 ranges from +1V to 0, for example.
Changes to V. As a result, the power supply control circuit 8 enters a 1V off-It state, and the voltage applied to the operational amplifier 10 becomes O, so the operational amplifier 10 enters a 1W OR state and information is cut off here. Also, since the information transmission lines from the plurality of units are all connected to the common line 3, the information sent from unit A to the monitoring device is sent into the other units.

A diode 11 is used to prevent this. In addition, the electronic switching circuit 2 for signal voltages in which the transmitted information is at a low frequency and the polarity is unidirectional can have a simple circuit configuration with almost no need to consider transmission frequency characteristics, distortion rate, crosstalk, etc. It is.

For example, by using an integrated circuit including several operational amplifiers 10 or diodes 11, the circuit configuration is easy and information can be connected and disconnected at low cost. Incidentally, if the switching circuit control voltage of the unit selection switch 6 is selected to be high and this is directly used as the power source for the operational amplifier 10, the power source control circuit 8 can be omitted. FIG. 3 is a block diagram showing the circuit configuration of another embodiment of the electronic switching circuit 2. In FIG. That is, in order to disconnect information from each unit, diode 1 is used in Figure 2.
Although the operational amplifier 10 is connected in series with the diode 12 in the circuit configuration shown in FIG. 3, the diode 12 is connected in such a way as to branch the transmission line. Further, the selection switch 6 is set so that all the input terminals of the units not selected are connected to earth.
Now, when the unit selection switch 6 is set to the unit A position, the input terminal 9 of unit A becomes 11 open 11, so a voltage V is applied in the opposite direction of the diode.

O (higher and has the same polarity due to the information voltage)
is added, the diode 12 becomes reverse biased, and the diode 12 becomes 1! The state becomes OFF 8. Information is then sent to the outside through diode 11. Next, when the unit selection switch 6 is set to another position, the input terminal 12 is set to 1, so that the diode 12 becomes "on 1" (low state).

Therefore, the transmission path is short-circuited by the diode 12, and all information from unit A is not sent to the outside. The diode 11 is for preventing the leakage from going around to other units as explained in FIG. This circuit configuration is also an easy-to-configure and low-cost switching circuit as shown in FIG. 2. As explained above, according to the method of the present invention, the information indicating the operating status sent from multiple units is switched in two stages and transmitted through a common line, thereby greatly reducing the amount of wiring that goes in and out of the monitoring device. do.

Further, since the electronic switching circuit in this device has this information at a low frequency and has only one direction of polarity, the circuit configuration can be simplified, which has the effect of contributing to cost reduction.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the method of the present invention, and FIG.
This figure is a block diagram showing one embodiment of the electronic switching circuit, and FIG. 3 is a block diagram showing another embodiment of the electronic switching circuit. 1: Unit, 2: Electronic switching circuit, 3: Common line, 4: Monitoring device, 5: Item selection switch, 6: Unit selection switch, 7: Switching circuit control voltage, 8: Power supply control circuit, 9:
Input terminal, 10: operational amplifier, 11: diode (for backflow prevention), 12: diode.

Claims (1)

[Claims] 1 A plurality of pieces of monitored information consisting of DC voltages in a plurality of units constituting a communication device are output via an open/close circuit, the output is led to a monitoring device via a common line, and in the monitoring device, a desired unit is In the monitoring method of the communication device, the switching circuit selects the switching circuit in the unit, and selects desired monitored information in the common line to monitor the unit. A monitoring method for a communication device, comprising a diode connected in series to an output of an amplifier, the power supply of the amplifier being controlled by a control signal from the monitoring device, and opening/closing of the monitored information.