JPS6130342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording device that rerecords information when the magnetic force of a magnetic card becomes weak.

For example, data such as account numbers and secret numbers are recorded on magnetic cards used in automatic teller machines and automatic teller machines that are online, but when they are online, the data on the magnetic cards is not updated. Note that card data may be updated when recording a valid code that indicates the number of failed attempts to enter a secret number, but since the correct input is usually made, it is quite rare for card data that includes a valid code to be updated. It is.

Therefore, the magnetic force of the magnetic card is affected by external influences.
It has the drawback of becoming weak due to dirt, wear, aging, etc., resulting in data reading errors.

In order to prevent this, when a magnetic card is inserted into an automatic teller machine or an automatic teller machine, the magnetic force can be made fresh by re-recording each time, but on the other hand, the magnetic force can be made fresh by re-recording each time a magnetic card is inserted into an automatic teller machine or an automatic teller machine. It is also necessary to reciprocate the magnetic head, which is undesirable because it causes wear on the magnetic head and increases the number of write errors.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnetic card re-recording device which allows the magnetic force of a magnetic card to be made fresh and which requires an extremely small operating load on a magnetic head device.

According to this invention, the detection power level of the data on the magnetic card is determined, and when this determination is less than a predetermined value, the data is re-recorded, so the predetermined value described above must be set to a value that will not cause a succession error. For example, reading errors due to changes over time or variations in equipment can be prevented.

An embodiment of the present invention having such characteristics will be described in detail below with reference to the drawings.

The drawing shows a card rerecording device in an automatic teller machine, and in FIG. 1, a card 1 is inserted into an insertion slot 2.
When the card 1 is inserted into the card, the first detector PH ₁ detects the leading end of the card, thereby driving the transfer belts 3, 3 in the taking-in direction, and the card 1 is transferred while being held by the transfer belts 3, 3. During this transfer time, data is read from the card 1 by the reading magnetic head RH.

Next, when the second detector PH ₂ detects the leading end of the card 1, the drive of the transfer belts 3, 3 is stopped, and when a return command is output, the transfer belts 3, 3 are driven in the return direction. When the card 1 is returned and the rear end of the card 1 is detected by the first detector PH ₁ , the driving of the moving belts 3, 3 is stopped. When updating or re-recording the data on card 1, the write magnetic head is
Conducted by WH.

FIG. 2 shows a card 1, on which data such as an account number, secret number, and validity code are recorded on the magnetic stripe 4 and given to the customer.

The magnetic force of the card 1 is at its maximum when the card is issued, and decreases with frequency of use. Attenuation of magnetic force also occurs due to external influences, dirt, etc.

Therefore, when the attenuation of the magnetic force reaches a value that makes reading impossible for the magnetic head, a reading error occurs.

FIG. 3 shows a control circuit for a device that performs re-recording when the magnetic force of the card 1 falls below a predetermined value, and will be explained with reference to the flowchart of FIG. 4.

When the card 1 is inserted into the card insertion slot 2 of the automatic teller machine, the first detector PH ₁ detects this and inputs a signal to the feed drive control circuit 5.
The card 1 is taken into the interior by driving and controlling the transfer belts 3, 3 in the taking-in direction.

At this time, the reading magnetic head RH reads the card data, and this data reading signal is sent to the preamplifier 6.
Demodulator 9 via differential amplifier 7 and waveform shaping circuit 8
The demodulator 9 separates the data signal and the clock signal, the data signal is stored in the register 10, and the clock signal is input to the sample circuit 11.

The data signal output from the demodulator 9 is subjected to a parity check by the inspection circuit 12 to determine whether or not there is a reading error. If it is determined that there is a reading error, a signal is input to the feed drive control circuit 5. Drive control is performed to return the card 1.

A slice level is set in the level detection circuit 13, and this slice level is set to a value that has a slight margin above a value that makes the differential operation of the differential amplifier 7 unstable (a value that makes data reading impossible). .

The level of the data continuation signal from the preamplifier 6 is determined by the level detection circuit 13, and the detected output signal is inputted to the sample circuit 11 via the waveform shaping circuit 14.

In the sample circuit 11, it is determined whether or not there is a detection output signal from the level detection circuit 13 at the output timing of the clock signal from the demodulator 9, and when there is no detection output signal, the magnetic force of the magnetic recording in that part is It determines that it is attenuated and outputs a determination signal.

This determination signal is then stored in the flip-flop 15 as the first plug ON.

The secret number stored by the customer is input into the automatic teller machine and compared with the secret number recorded on the card 1.

If there is no match as a result of the verification, the second flag is set to ON and stored in the flip-flop 16, and at this time the validity code of the card data is updated.

If the input of the secret number is OK, or if it is OK after inputting it again, then the payment process is performed.

After the payment process is completed, the first flag and second flag are checked.

In other words, when both flip-flops 15 and 16 are normal (when the magnetic force of card 1 is
When the input of the secret number is OK), the AND gate 17 opens the gate and sends a signal to the drive control circuit 5 to control the card 1 to be returned based on the return command.

However, when the flip-flop 15 stores the magnetic force attenuation of the card 1, that signal is input to the AND gate 19 via the OR gate 18, so the gate opens based on the output of the return command and a signal is output. .

The feed drive control circuit 5 controls the card 1 to be driven in the return direction, and when the card 1 is transferred in the return direction, the write circuit 20 transfers the card data stored in the register 10 to the card using the write magnetic head WH. Re-record to 1.

When the re-recorded card 1 is detected by the first detector PH ₁ , the feed drive control circuit 5 controls the drive to transfer the card 1 in the receiving direction again.

Then, the card 1 is read again by the reading magnetic head RH, and the card data is parity-checked by the inspection circuit 12 to check for any reading errors.

If a reading error occurs, it is determined that the magnetic stripe 4 of the card 1 is defective, this is displayed, and the card 1 is returned; however, if there is no reading error, the magnetic stripe 4 of the card 1 is refreshed. It will be returned as such.

Thereafter, the flip-flops 15, 16, etc. are reset and the re-recording operation is completed.

Furthermore, upon checking the second flag, if the flip-flop 16 stores an incorrect entry of the secret number, the validity code of the card data is updated.

Therefore, the signal from the flip-flop 16 is inputted to the feed drive control circuit 5 and the write circuit 20 via the OR gate 18 and the AND gate 19, and thereafter the signal from the flip-flop 15 is inputted to the first flag, that is, the flip-flop 15.
Similarly to the operation of the output signal, the write circuit 20 records card data on the card 1 via the head WH, then reads the card data with the head RH, performs a parity check with the inspection circuit 12,
Return card 1.

In the above-described embodiment, the validity code of the card data is updated, but this update is performed by outputting the data in the register 10 one after another, and storing the data in the register 10 again after the corresponding digit part to be updated is updated.

When updated, the data includes, in addition to the validity code, data on the month and date of use, which is the monthly limit for offline use in the online-offline shared system. However, in any case, it is quite rare that the entire card data is updated by updating the valid code or offline usage data.

Card data reading inspection is performed at register 10.
Alternatively, the contents of the flip-flops 15 and 16 may be temporarily stored in the core memory and read out and inspected as necessary.

Further, in the case of a reading error, the card may be reread a predetermined number of times, and the card may be collected in the case of a reading error.

The present invention can also be used when card data is not updated at all, and the features of the present invention are best exhibited in that case.

In addition, if the machine number is recorded on the card to indicate which machine recorded the card, the machine that caused the recording failure can be detected by the machine number, which is useful for maintenance.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic side view of a card re-recording device, FIG. 2 is a plan view of the card, FIG. 3 is a control circuit block diagram, and FIG.
The figure is a flowchart. 10...Register, 11...Sample circuit, 1
3...Level detection circuit, 15...Flip-flop, 20...Writing circuit, RH...Magnetic head for reading, WH...Magnetic head for writing.

Claims (1)

[Scope of Claims] 1. A magnetic card re-recording device comprising data that is not necessarily updated each time it is used, comprising: a detection means for detecting data on the magnetic card; and a determination means for determining the detection power level of the detection means. and register means for quantizing the detection output of the detection means and storing it as data; A magnetic card re-recording device comprising a recording means for re-recording onto the card.