JPS59174028A - Switching system of device in current use to spare one - Google Patents

Abstract

PURPOSE:To reduce the power consumption and at the same time to improve the reliability with check of faults, etc. for a switching system of a device in current use to spare one, by supplying usually no power to a spare device but supplying the power periodically and in a short time to the spare device to confirm an alarm. CONSTITUTION:When an alarm signal (a) is transmitted from a transmitter/ receiver 1, a control signal (g) is transmitted from a control part 6 to actuate a power supply 4. Then a transmitter/receiver 2 is actuated. At the same time, an alarm signal (b) is checked at the part 6. If no signal (b) is delivered, a control signal (c) is transmitted to switch a switching part 5. Thus the transmitter/ receiver 2 is selected. In this case, no control signal (f) is delivered to give no actuation to the power supply 3. Therefore no power is supplied to the transmitter/receiver 1. While the signal (f) is sent every fixed period of time to the power supply 3 under no actuation from the part 6. Then the power is supplied in a short time to the non-selected transmitter/receiver 1 to check the output of the signal (a).

Description

DETAILED DESCRIPTION OF THE INVENTION [This discovery] relates to a system for switching between working and standby devices when a plurality of devices such as transmitters and receivers are used.

BACKGROUND ART In recent years, even for devices such as satellite communication earth stations installed on the ground, a design policy has been adopted to reduce power consumption as much as possible from the standpoint of saving labor.

FIG. 1 is a block diagram illustrating a switching system for active/backup equipment used in a conventional satellite communications earth station. In the figure, 1 and 2 are transceivers, 3 and 4 are power supplies that supply power to transceivers 1 and 2, respectively, 5 is a switching unit that switches the signal series of transceivers 1 and 2, and 6 is a switching drive for switching unit 5. This is a control section consisting of a final logic circuit and the like. The transceivers 1 and 2 send alarm signals a and b when a malfunction or failure occurs, such as when the transmission/reception status has a ratio below a predetermined value.
are sent to the control section 6, respectively. The control unit 6 checks the presence or absence of these alarm signals a and b and outputs a corresponding control signal C.
is sent to the switching section 5, and the switching section 5 is switched. In the state shown in FIG. 1, the switching section 5 is switched to the transceiver 1 side, and the transceiver 1 is selected as the active device, and the transceiver 2 is the standby device. Further, display signals d+e for displaying the selected and non-selected states are respectively sent from the transceiver 1-2 to an external device such as a monitor.

However, in such a conventional switching method,
Since power is supplied from the power supply to the transmitter/receiver that is not currently being used as a backup device, there is a problem in that it is not possible to reduce power consumption sufficiently.

This invention was made to solve these problems, and its purpose is to provide a system for switching between active and standby devices that can significantly reduce overall power consumption with a simple configuration. .

In order to achieve such an object, the present invention controls the power supply by a control unit to stop the supply of power to the standby device, and periodically supplies power to check for failure of the standby device. This is how it was done.

FIG. 2 is a block diagram of an embodiment in which the active/standby device switching system according to the present invention is applied to a satellite communication earth station.

In the figure, the same or corresponding parts as in FIG. 1 are given the same reference numerals. The control unit 6 first sends a control signal f to the power supply 3. This causes the power supply 3 to operate and supply power to the transceiver 1.

If the alarm signal a is not output from the transceiver 1 that is in the operating state, the control signal C is sent from the control section 6, the switching section 5 is operated, and the transceiver 1 is selected. In this case, since the control signal g is not output, the power supply 4 does not operate, and therefore no power is supplied to the transceiver 2.

Here, when the alarm signal a is sent from the transceiver 1, the control signal g is sent from the control section 6, the power supply 4 is operated, and the transceiver 2 is supplied with power and becomes in an operating state. At the same time, the alarm signal C is checked by the control section 6, and if it is not output, the control section 6 sends out a different control signal C from the above, and the switching section 5 is switched to select the transceiver 2. In this case, since the control signal f is not output, the power supply 3 does not operate, and no power is supplied to the transceiver 1. In this way, since power is not supplied to the standby device, the power consumption of the device as a whole is significantly reduced.

However, in this case, if a backup device that does not supply power fails, the status will not be known, so in this invention, power is supplied to the backup device at regular intervals and automatic checks are made to see if an alarm signal is emitted from this device. I try to check it. That is, the control unit 6 sends a control signal f or g to the power supply 3 or 4 that is not operating at regular intervals.
and supplies power for a short time to the unselected transceiver 1 or 2, and at this time alarm signal a or b
It is shown that the control unit 6 checks whether or not is output. To the outside, the display signal d or e is sent directly from the control section 6, or the signal i or j is sent from the control section 6 and the display signal d or e is sent from the transceiver 1 or 2 as before. It is designed to output . As a result, reliability in switching between active and standby devices can be greatly improved.

In the above embodiment, a case has been described in which two transceivers are provided as devices and switching is performed, but it is also possible to provide three or more transceivers, with one in use and the remaining as a backup.

As described above, according to the active/standby device switching method according to the present invention, power consumption can be significantly reduced because power is not supplied to the standby device, and power is still periodically supplied to the standby device for short periods of time. This has the excellent effect of greatly improving the reliability of the standby equipment because it confirms the alarm signal and checks for failures.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional working/standby device switching method, and FIG. 2 is a block diagram of an embodiment to which the working/standby device switching method according to the present invention is applied. 1.2... Transmitter/receiver, 3, 4... Power supply, 5...
・・Switcher, 6ψ・- working control section.

Claims (1)

[Claims] A current/standby device switching system that includes multiple devices that have a power source and are supplied with power from the power source, operates a switching section under the control of a control section, selects one device as the current device, and selects the other device as a backup. In the present invention, the control unit controls the power supply to stop the supply of power to the standby device, and periodically supplies power to check for failures in the standby device. Spare device switching method.