JP2538910B2 - Microprocessor application equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a micro processor application device such as a computer, and in particular, to reliably notify an operator of the occurrence of a power failure at the time of a power failure and to prompt an appropriate processing. The present invention relates to a suitable microprocessor application device.

[Conventional technology]

With the progress of micro processors, computers and devices incorporating the computers have been widely used in offices, factories and homes. As the number of computers increases, countermeasures against blackouts become a problem.

That is, if a power failure occurs during operation of the computer, the data in the memory of the computer will be lost, normal operation will not be possible, and the created program and data will be lost. In addition, at this time, if data was written on the floppy desk or hard disk, the data registered on the disk is lost due to the runaway of the disk device,
In some cases, the entire disk becomes readable and writable.

As a countermeasure against this, an uninterruptible power supply 2 having a capacity of 100 VA to several KVA as shown in FIG. 5 has been used. The uninterruptible power supply 2 constantly charges the battery 5 in which the AC power from the AC power supply 1 is converted into DC by the converter 3. During a power failure, the inverter circuit 4 reversely exchanges the DC power from the battery 5 with the AC power required for the terminal device 7 and supplies the AC power. Should AC power supply 1 fail, AC power will be supplied using the DC power stored in battery 5 as a power supply. With an ordinary uninterruptible power supply, power can be supplied from only the battery 5 for several minutes to several tens of minutes.

Here, the terminal device has been described as an example of the microprocessor application device.

[Problems to be solved by the invention]

In the above-mentioned conventional technology, since the display does not appear on each terminal even if a power failure occurs, it is sometimes used without being interrupted by the power failure. If the power failure time is long, the accumulated charge in the battery finally becomes zero, and the output power is cut off. There was a problem that programs and data might be lost or damaged.

Here, there are the following cases as an example if you do not notice when a power failure occurs. In the first case, in a system in which the power supply for the terminal device and the power supply for lighting are separate systems, if only the power supply for the terminal device fails, as the second case, the power plug for the uninterruptible power supply is connected from the outlet. It may come off. The first case occurs when a person other than the terminal operator opens the switch of the power source by illusion that the power source is not used. In addition, the second case is likely to occur in an office or when the plug comes off the power cord without knowing it at home.

From the above, it is necessary to display that the uninterruptible power supply is operating when the external power supply is lost due to the plug being unplugged from the content including the power failure.
In order to meet this demand, there is a conventional example in which a light emitting diode is attached to an uninterruptible power supply device to display. However, in the conventional device, the display surface of the light emitting diode as a display element is generally small, and since the display element is attached to the uninterruptible power supply device itself, the display device placed at a position away from this power supply device. Often the operator who concentrates on the nerve does not notice.

Therefore, the present invention provides a microprocessor-applied device capable of surely notifying the operator of the fact that the uninterruptible power supply is operating when the loss of external power source occurs and performing proper processing before the battery discharge is completed. The purpose is to provide.

[Means for solving problems]

The above object is achieved by displaying information about the loss of the power supply on the display screen of the microprocessor-applied device as the external power supply of the uninterruptible power supply is lost.

More specifically, power failure detection means for detecting the loss of the external power supply, means for receiving a power failure detection signal from the power failure detection means, and making a display signal regarding the power loss and the remaining operable time,
It is characterized in that means for displaying on a display screen of a microprocessor application device based on the display signal is provided.

[Action]

According to the configuration of the above invention, when the power failure state of the external power supply is detected by the power failure detection circuit, the detection signal is sent from the uninterruptible power supply to the microprocessor application device side, and the processing section can perform the power failure state or the remaining operation. A display signal indicating time is generated. The display signal is converted into an optical signal or an audio signal and displayed on the display unit. The display unit is provided in the input / output device.
It is conceivable that the CRT screen is visually appealing such as character display, or that the voice guidance is given by a speaker or the like attached to the input / output device itself or in the vicinity.

In this way, the operator can be directly notified of the power failure or the drivable time, so that appropriate processing that should be performed at the time of power failure can be performed in advance and data loss can be prevented.

〔Example〕

Next, an embodiment according to the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 shows a first embodiment. Reference numeral 1 denotes an AC external power supply, which constantly supplies AC power to the uninterruptible power supply 2. The AC power is converted into DC by the converter 3, and the battery 5 is filled with the AC power.
Is supplied to. The inverter 4 is reversely exchanged with an alternating current having a predetermined frequency to supply power to the terminal device 7.

A power failure detection circuit 6 is connected to the input part of the converter 3 of the uninterruptible power supply 2. This power failure detection circuit 6 may be able to detect, for example, by the open / closed state of the relay and its auxiliary contact, and may be configured to use a comparator to compare the reference voltage and the voltage of the external power supply 1 at the TTL level. Good. The output of the power failure detection circuit 6 is sent to the power failure processing circuit 8 provided in the terminal device 7 via the cable 15.

The power failure processing circuit 8 receives the power failure detection signal and creates a display signal indicating the status of the power failure or the remaining operable time after the power failure. The content may be one of the power failure state and the remaining operable time, or both may be displayed simultaneously for further confirmation. The display signal is displayed on the screen of the CRT (see FIG. 3), or voice guidance or alarm sound is output from a speaker or the like attached to the terminal device 7. Although the power outage processing circuit 8 may be a dedicated circuit composed of discrete elements, it is composed of software processing by a program by effectively utilizing the functions of the computer. The remaining operable time can be known in advance from the specifications of the uninterruptible power supply, that is, the capacity of the battery 5, so the available time is preset in the power failure processing circuit 8. Further, it is possible to calculate the elapsed time and display the time in a timely manner.

With the above configuration and operation, the terminal operator can know the occurrence of a power outage and the remaining operation time in an early stage, and appropriate measures to be taken at the time of power outage (for example, processing such as storing data being created in a disk). It can be performed. Also,
If the terminal device 7 is often left unattended,
It is an effective means to automatically store the program being created in the disk by the processing of the power failure processing circuit 8.

Second Example Next, a second example will be described. In the first embodiment described above, the power failure detection signal is sent to the terminal device 7 by the cable 15, but in the second embodiment, the power failure detection signal is superimposed on the power cable 16 as shown in FIG. The special cable 15 (Fig. 1) is used for sending. This can prevent the wiring from becoming complicated.

In FIG. 2, a high frequency modulation circuit 9 is provided to superimpose the power failure detection signal on the power cable 16. The modulation output of the high frequency modulation circuit 9 is superimposed on the output of the inverter 4 by the coupling circuit 10 and sent to the terminal device 7 via the power cable 16. The low-pass filter (LPF) 11 and the high-pass filter (HPF) 12 are installed in the power input section of the terminal device.
Is provided. The low-pass filter 11 passes only low-frequency power (hence, power supply power), and the passed power is used for driving a CRT or the like. On the other hand, the high-pass filter 12 passes only the high frequency signal (hence, the power failure detection signal) and sends it to the power failure processing circuit 8. In this way,
The power failure detection signal sent superimposed on the power cable 16 is
Similar to the first embodiment, it is converted into a power failure display signal. Less than,
The same is true and the description is omitted. A low-pass filter
11 does not actually need to be newly provided. This is because most of the power supplies of the terminal equipment use the switching regulator, and thus a low-pass filter for preventing radio noise secondary emission from the power supply line is preliminarily equipped.

Third Example Next, a third example will be described. It is shown in FIG.
In the third embodiment, the power failure detection signal is wirelessly transmitted instead of wired. That is, a transmission circuit 13 is provided at the output stage of the power failure detection circuit 6, and a reception circuit 14 is provided at the input stage of the power failure processing circuit 8 as a pair. As a form of wireless transmission, an optical signal, a radio wave signal or the like may be appropriately selected and used. By performing wireless transmission in this manner, it is possible to prevent the complication of the configuration due to the reduction in the number of wires.

〔The invention's effect〕

According to the present invention, since it is possible to prevent the operation of the microprocessor application device without knowing that the power failure has occurred, the program and data of the microprocessor application device are erased by the discharge termination of the battery of the uninterruptible power supply. Alternatively, it can be prevented from being damaged.

[Brief description of drawings]

FIG. 1 is a block diagram showing the first embodiment of the present invention, FIG. 2 is a block diagram showing the second embodiment, FIG. 3 is an explanatory diagram showing a display example on a CRT screen, and FIG. FIG. 5 is a block diagram showing an embodiment, and FIG. 5 is a block diagram showing a configuration of a conventional uninterruptible power supply. 1 ... AC external power supply, 2 ... Uninterruptible power supply device, 3 ... Converter, 4 ... Inverter circuit, 5 ... Battery,
6 ... power failure detection circuit, 7 ... terminal device, 8 ... power failure processing circuit, 9 ... modulation circuit, 10 ... coupling circuit, 11 ... low-pass filter, 12 ... high-pass filter, 13 ... transmission circuit, 14 ... Receiver circuit.

Claims (2)

(57) [Claims] 1. A microprocessor application device comprising a display screen and supplied with electric power from an external power source through an uninterruptible power supply device having a storage battery, wherein a power failure of the external power supply output from the uninterruptible power supply device. A microprocessor-applied device comprising: means for receiving a detection signal and generating a display signal relating to power loss and remaining operating time, and means for displaying on the display screen based on the display signal. 2. A microprocessor application device comprising a display screen and supplied with electric power from an external power source through an uninterruptible power supply unit having a storage battery, wherein the external power source outputs a power failure from the uninterruptible power supply unit. Means for receiving a detection signal and creating a display signal relating to power loss and remaining operable time, means for displaying on the display screen based on this display signal, and means for saving data etc. being created in a non-volatile storage device A microprocessor application device comprising: