JPS5843408Y2 - storage device protector - Google Patents

Description

[Detailed description of the invention] The present invention is a protection device for a storage device that backs up a storage device installed in a device with a battery power source when the device is not in use, and the device protects the storage device when the potential of the battery power source drops below a certain level. The present invention relates to a notification device that notifies an operator when a situation occurs in which a storage device cannot be expected to retain data in a correct state due to a battery power source.

Generally, in electronic devices equipped with a storage device (semiconductor memory), when the device is used, the operator turns on the power (AC power) of the device and supplies the storage device with the power supply, while the power is turned off when the device is not in use. Turn off the power to the device.

However, the storage device stores various data when the device is in use, and in order to prevent the data in the storage device from being lost when the device is powered off, the storage device is banked using battery power when the device is powered off. The data is protected by amplification.

However, if the potential of the battery power source drops below a certain level during back-amplification of the storage device, accurate data retention in the storage device cannot be expected.

Therefore, in the present invention, it is detected whether or not a situation has occurred in which data cannot be expected to be retained in a storage device using battery power. This system is designed to notify users that the data in the storage device is inaccurate, so that it can be dealt with efficiently.

For example, when the potential of the battery power supply drops below a certain level f during backup of a storage device, it may be possible to detect this and immediately notify the user. There is no point in reporting this.

Therefore, it is conceivable to continue the notification state forever or for a certain period of time, but in the former method, the notification is usually made by lighting a lamp etc. using battery power, so if the battery power is completely discharged. In such a case, the rung goes out and the operator is shown as if the battery power supply is in a normal state, making it impossible for the operator to know the exact state.

Therefore, when the equipment is to be used again, there is a serious problem in that if the operator processes the data one after another assuming that there is no abnormality in the data in the storage device, erroneous processing may occur.

Further, in the latter case, if the lamp goes out while the operator is absent, the same problem as described above occurs in that erroneous data processing is performed the next time the equipment is used.

In order to solve such problems, the present invention makes it possible to notify the operator that the data held in the storage device is abnormal when the device is turned on when the operator is about to start using the device, so that processing based on the incorrect data is performed. This is to prevent it from happening.

The present invention will be described in detail below with reference to the drawings.

In the figure, 1 is a storage device, and A from the AC power supply side.
DC power supply +V after -D conversion and resistor R2゜diode D via first relay switch C.

A power supply circuit connected to the secondary battery 2 via a resistor R and a power supply circuit connected to the secondary battery 2 via a resistor R are provided.

Further, when the storage device 1 and the power source 10V are connected and power is supplied, the secondary battery 2 is charged from the power source +V.

A diode L is connected between the diode D and the resistor R.
2 - A voltage of +5V for clamping is applied via the node D2.

Next, 4 is a relay driver circuit driven by the output from the comparator 3 which detects whether the potential of the secondary battery 2 is above a certain value.

The comparator 3 has a non-inverting terminal connected to a line A from the secondary battery 2 side, and an inverting terminal connected to a line B to which a specified voltage E is applied.

The comparator 3 has an inverted terminal - and a non-inverted terminal +
Compare the voltage levels of and if the + side is high, the output line is H1g
h level and the relay driver circuit 4 is activated.
Moreover, if one side is high, the output line becomes Low level and the relay driver circuit 4 is not activated.

The relay driver circuit 4 is connected to a relay 5 via a diode D3, and the other end of the relay 5 is connected to a power source of 10V.

When the relay driver circuit 4 is activated, the relay 5 is energized and the first relay switch C is closed, and when the relay driver circuit 4 is not activated and the relay 5 is not energized, the first relay switch C is closed. The relay switch C is in an open state.

The switch S is for arbitrarily operating a relay 5 separately from the relay driver circuit 4 controlled by the comparator 3, and is connected to the relay 5 via a diode t-"D and the other end of this switch. is grounded.

Reference numeral 6 denotes a notification circuit for notifying the outside when the potential of the secondary battery 2 drops below a certain level, and a light emitting diode 6' is provided as the notification means.

This notification circuit connects the second relay inch C of the relay 5 in series with the light emitting diode rotor.

Therefore, the light emitting diode 6' is controlled by the second relay switch C of the relay 5.

When the relay 5 is energized, the second relay switch C is connected to the contact XaU, and when the relay 5 is not energized by the comparator 3, the VC is connected to the contact Y side. A light emitting diode 6' is connected to the side thereof, and a voltage of 5V derived from a DC power supply +V is applied.

Also, the signal STP when lighting the light emitting diode 6'
This is extracted and used as a conditional signal to prevent program execution from starting.

To briefly explain the series of operations of the above configuration, although it is not shown in the figure, the power switch installed between the power supply +V and the AC power supply can be used to operate the power switch of the device equipped with the storage device. Operate equipment.

First, the power switch is turned on during normal use.

When all the secondary batteries 2 are at a voltage level above a certain value, the relay driver circuit 4 is activated by the output from the comparator 3, and the relay 5 is energized.

The operation of this relay 5 closes the first relay switch C, and another second relay switch C closes the contact XIIQ.
Connect to.

Through such an operation, the storage device 1 is connected to the power supply +V. -, and power is supplied to the storage device 1 from this power supply +V.

Further, at this time, the light emitting diode 6 is not lit.

When the power switch of the above-mentioned device is turned off and the device is not in use, power is supplied from the secondary battery 2 to the storage device 1. For example, the secondary battery 2
Let it be done by.

On the other hand, the operator turns on the power switch of the equipment in order to resume operation of the equipment from the above-mentioned unused state.
Let N.

At this time, if the secondary battery 2 is at a voltage level below a certain value, the output from the comparator 3 is at a low level, so the relay driver circuit 4 is not activated, and therefore the relay 5 is not energized.

As a result, the first relay switch C is kept open, and the second relay switch C is kept connected to contact YgIII.

As a result, power is not supplied to the storage device 1 from the power supply +V, and the light emitting diode 6' lights up to notify the operator that the state of the secondary battery 2 has fallen below a certain value.

First, the operator who is about to start operating the equipment is informed that the data currently held in the storage device 1 is inaccurate, and a warning is given to the operator not to use the data for processing. give.

At the same time, the signal STP can be used as a contational signal to prevent program execution from starting.

The notification is performed when the device is operated by turning on the power switch of the device, and since the notification operation is performed when the operator is present, it is possible to reliably notify the operator.

Upon sensing the E-record notification, the operator manually closes the switch S, thereby activating the relay 5 separately from the relay driver circuit 4 controlled by the comparator 3.

As a result, the first relay switch C is closed and the second
relay switch C switches to contact X1jllJ.

As a result, power is supplied to the storage device 1 from the power supply +V, and the secondary battery 2 is charged.

The light-emitting diode 6' that has been cut off goes out.

In this case, the operator erases the data held in the storage device 1, performs processing based on the correct data, and stores the correct data in the storage device 1 as appropriate.

Thereafter, when the potential of the secondary battery 2 reaches a certain value or more, the relay driver circuit 4 is activated by the comparator 3, so that normal operation continues.

As described above, in the present invention, the DC power supply +V after A-D conversion from the AC power supply side via the power switch of the device is interposed in the circuit connected to the storage device, and the circuit is opened and closed. a first switch means, and a notification circuit comprising a notification means (light emitting diode) for notifying the potential level state of the battery power source to the outside, and supplying power based on an ON operation of a power switch of the device; a second switch means which opens and closes the circuit through the notification circuit; and a battery which detects whether the potential of the battery power source is above or below a certain reference level and generates two different output signals. Power supply level detection means (converter/ζlator)
and a switch control circuit for controlling opening and closing of the first and second switch means in response to the output signal of the level horizontal opening means when the power switch of the device is turned on.
relay and relay drive circuit), which closes the first switch means and closes the second switch means in response to a signal from the level detection means indicating that the potential of the battery power source is above a certain reference level. the switch control circuit for opening the first switch means and closing the second switch means in response to a signal indicating that the first switch means is open and the second switch means is below a certain reference level. Therefore, if the potential of the battery power supply is below the reference level when the operator operates the power switch of the equipment from the time of back-amplification of the battery power supply (when the equipment is not in use) to the start of operation of the equipment, The notification means operates only when the data in the device cannot be guaranteed, informing the operator that the data in the storage device is inaccurate, and preventing the operator from processing data using inaccurate data in the storage device. can do.

Furthermore, this notification has the feature that the operator can be reliably informed when the power switch of the device is operated, and that prevention can be reliably carried out.

[Brief explanation of the drawing]

The figure is an electrical circuit diagram showing the configuration of the protective device of the present invention. 1...Load, 2...Secondary battery, 3.
...Comparator, 4...IJ L/
-Tribar circuit, 5...Relay, 6...
...Notification circuit, 6'...Light emitting diode, C
1 and C2...Relay switch, +V...
・・Power source on the AC power supply side, D −D ・・Diode, R1 and R ・・Resistance, E ・・・・・
・Specified voltage.

Claims (1)

[Claims for Utility Model Registration] When the device is used, a DC power +V after A-D conversion is supplied from the AC power supply side via the power switch of the device to the storage device installed in the device. A protection device for a storage device configured to back up the device with a battery power source when the device is not in use, wherein the A-D
A first switch means interposed in a circuit connected to a storage device from the converted DC power supply +V to open and close the circuit, and a notification means for notifying the potential level state of the battery power supply to the outside, and an apparatus. a notification circuit to which power is supplied based on the ON operation of a power switch; a second switch means interposed in the notification circuit to open and close the circuit; a battery power level detection means (comparator) that detects whether or not the level is below and generates two different types of exit signals; A switch control circuit for controlling the opening and closing of the first and second switch means in response to a signal from the level detection means indicating that the potential of the battery power source exceeds a certain reference level. to close the first switch means and open the second switch means, and to open the first switch means and open the second switch means in response to a signal indicating that the first switch means is below a certain reference level. Said switch control circuit for closing the means. 1. A protection device for a storage device, characterized in that when a power switch of a device is turned on, the notification circuit notifies the potential level state of a battery power source.