JPH08329201A - Data writing device for magnetic card - Google Patents

Abstract

PURPOSE: To perform automatic correction so as to accurately write the data from a prescribed dimensional position based on the leading edge part of a magnetic card. CONSTITUTION: Clock data is written in the carried magnetic card by a write head 16, and data write is started a prescribed number of clocks after the leading edge part of the magnetic card. Contents written in the magnetic card are read by a read head 17. The number of newly read clocks is successively added to calculate a running average of the number of prescribed clocks by an integrating means 21 with respect to the total number of read clocks of the magnetic card read by the read head 17, thus obtaining an average total number of clocks. A calculation means 21 obtains the number of correction clocks corresponding to the standard number of clocks from the leading edge part of the magnetic card to the data write start position based on a ratio of the average total number of clocks to the standard total number of clocks. Data is written in the carried magnetic card this number of correction clocks after the leading edge part of the magnetic card by a control means 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card data writing device for writing data to a magnetic card.

[0002]

2. Description of the Related Art Conventionally, a data writing device for a magnetic card is provided with a transporting means for transporting the magnetic card with one end thereof as a starting end portion, and a magnetic card is transported in a transporting path of the magnetic card transported by the transporting means. A sensor for detecting the starting end of the card and a writing head are arranged in this order.

At the time of writing data to the magnetic card, the magnetic card is conveyed by the conveying means, and when the sensor detects the leading end of the magnetic card, the clock output from the write head is started and detected by the sensor. After a predetermined number of clocks from the point in time, a prescribed number of clocks of data is written to the magnetic card.

In such a magnetic card, clock areas are set between the start end of the magnetic card and the data start position and between the data end position and the end of the magnetic card. Since data is written and read with the start end as a reference,
The dimensional accuracy of the clock area before the data start position is determined is strictly required.

[0005]

However, in the conventional magnetic card data writing device, the number of clocks to be written in the previous clock area between the start end of the magnetic card and the data start position, that is, the data writing start position, etc. Since it is set as a fixed parameter, it cannot cope with rotation error of the motor of the conveyance means, secular change, environmental changes such as temperature and humidity around the device, and there is a problem that the data write start position is displaced. .

The present invention has been made in view of the above circumstances, and provides a magnetic card data writing device capable of automatically correcting data so as to accurately write data from a predetermined dimensional position with respect to the starting end of the magnetic card. The purpose is to provide.

[0007]

SUMMARY OF THE INVENTION A magnetic card data writing apparatus according to the present invention comprises a carrying means for carrying a magnetic card, a sensor for detecting a leading end of the magnetic card carried by the carrying means, and the carrying means. A write head for outputting data to the magnetic card after a predetermined number of clocks from the time when the sensor detects the starting end of the magnetic card carried by the means, and writing on the magnetic card carried by the carrying means. A reading head for reading the read contents, and an integrating means for moving average of a predetermined number of readings to obtain an average total number of clocks while sequentially adding new readings for the total number of reading clocks of the magnetic card read by the reading head. Enter the standard total number of clocks in the full length area of the magnetic card and the standard number of clocks from the beginning of the magnetic card to the data start position. Storage means for calculating the correction clock number corresponding to the standard clock number from the starting end of the magnetic card to the data writing start position, based on the ratio of the average total clock number and the standard total clock number. And a control means for writing data to the magnetic card conveyed by the conveying means from the start end of the magnetic card by the write head after the number of correction clocks calculated by the arithmetic means.

[0008]

In the data writing apparatus for a magnetic card of the present invention, the magnetic card is conveyed by the conveying means, and the clock is output from the time when the starting end of the magnetic card is detected by the sensor, and the write head outputs a predetermined number of clocks. Data is written to the magnetic card, and the read head reads the content written on the magnetic card. Regarding the total reading clock number of the magnetic card read by the reading head, a new reading amount is sequentially added, and the predetermined total reading number is moving averaged to obtain the average total clock number. Furthermore, the average total clock number and the standard total clock number are calculated. Based on the ratio, the correction clock number corresponding to the standard clock number from the start end of the magnetic card to the data writing start position is obtained.
Then, data is written to the magnetic card carried by the carrying means after the correction clock number calculated by the computing means from the start end of the magnetic card.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of a magnetic card data writing apparatus of the present invention will be described below with reference to the drawings.

FIG. 3 shows an example of the magnetic card 1. This magnetic card 1 is formed in a slender rectangular shape in the carrying direction, has a notch 2 at one corner of a start end 1a, and has a perforation 3 which is detachable near the end 1b. A magnetic recording band 4 that enables magnetic recording is formed along the edge portion on the second side.

The magnetic recording band 4 of the magnetic card 1 has a start end portion.
A front clock area C1, a data area D, and a rear clock area C2 are sequentially arranged from 1a. The length dimension of the front clock area C1 is regulated, the number of clocks is regulated in the data area D, and the rear clock area C2 is regulated to be longer than the regulated length dimension. A start flag is recorded at the start position STX of the data area D, and an end flag is recorded at the end position ETX.

FIG. 2 shows a schematic structure of the data writing device.
A transport passage 11 through which the magnetic card 1 can pass is formed,
Along the lower side of the transport passage 11, the starting end 1a of the magnetic card 1
Conveying means 12 for conveying with the tip as a tip is provided. In the conveying means 12, a plurality of conveyor belts 13 are rotatably stretched along the lower side of the conveying passage 11, and a rotational driving force is transmitted from a motor 14 to the plurality of conveyor belts 13.

On the upper surface of the transport passage 11, from the upstream side in the transport direction, a sensor 15 for detecting the starting end portion 1a of the magnetic card 1 to be transported, and a write head 16 for writing data on the magnetic recording band 4 of the magnetic card 1. A reading head 17 for reading the written data is sequentially arranged.

FIG. 1 shows a block diagram of a data writing device. Reference numeral 21 denotes a CPU for controlling the entire data writing device, and storage means (second storage means) for storing programs and the like on a system bus of the CPU 21. And a RAM 23 as a storage means (first storage means) capable of writing and reading various data.

Further, the system bus of the CPU 21 has a head circuit 24 for processing a write signal to the write head 16 and a read signal from the read head 17, a sensor circuit 25 for processing a detection signal from the sensor 15, and a motor 14. A motor circuit 26 for controlling the drive of is connected.

In the ROM 22, standard values such as the total length of the magnetic recording band 4 of the magnetic card 1 and the standard total number of clocks, the clock areas C1 and C2 written in the magnetic recording band 4 of the magnetic card 1, and Standard values such as the length of the data area D and the standard clock number, and standard values such as the length from the sensor 15 to the write head 16 and the standard clock number are respectively written.

The RAM 23 also has a function of counting the number of clocks read by the read head 17 and a function of sequentially storing the total number of read clocks of the magnetic card 1 read by the read head 17.

Further, the CPU 21 has the following functions as a program.

The tip of the conveyed magnetic card 1 is the sensor 15
The function of a writing means for outputting a clock from a time point detected by the above and writing a predetermined number of clocks of data to the magnetic recording band 4 of the magnetic card 1 after a predetermined number of clocks.

Magnetic card 1 read by the reading head 17
With respect to the total number of read clocks, the function of the integration means for obtaining an average total number of clocks by moving-averaging a predetermined number of times (for example, 10 times) while sequentially adding new readings.

A first calculation for obtaining a correction clock number corresponding to the standard clock number from the starting end 1a of the magnetic card 1 to the data writing start position STX based on the ratio of the average total clock number and the standard total clock number. Function of the means.

The function of the second arithmetic means for obtaining the correction clock number corresponding to the standard clock number from the sensor 15 to the write head 16 based on the ratio of the average total clock number and the standard total clock number.

The magnetic card 1 carried by the carrying means 12
The data is written after the number of clocks obtained by adding the correction clock numbers obtained by the first and second arithmetic means from the time when the sensor 15 detects the beginning 1a of the The function of the control means for writing the data after the number of correction clocks calculated by the first calculation means.

Next, the operation of this embodiment will be described.

First, the writing / reading operation to / from the magnetic card 1 will be described.
This will be described with reference to the timing chart of FIG.

When the starting end 1a of the magnetic card 1 in the carrying path 11 is carried as the leading end and the starting end 1a of the magnetic card 1 is detected by the sensor 15, magnetic writing of clock data from the write head 16 is started.

When the starting end 1a of the magnetic card 1 reaches the position of the write head 16, while writing clock data to the magnetic recording band 4 of the magnetic card 1, a predetermined number of clocks elapses from the time when the sensor 15 detects the clock data. The actual data of the specified number of clocks is written, and further, the clock data is written to the terminal end portion 1b after the writing of the data. The data writing start position STX is corrected after the correction clock number obtained based on the ratio of the average total clock number and the standard total clock number, which will be described later.

Along with the writing to the magnetic recording band 4 of the magnetic card 1, the contents written in the magnetic card 1 are read by the read head 17, the clock signals read by the read head 17 are counted in the RAM 23, and each area C1, D is read. , C2 clock count and total read clock count.

When there is no read output from the read head 17, or when the passage detection sensor (not shown) detects the passage of the magnetic card 1, the magnetic output from the write head 16 is terminated.

The format written in the magnetic recording band 4 of the magnetic card 1 is, as shown in FIG. 5, a start end portion with respect to the writing range of the magnetic recording band 4 of the magnetic card 1, that is, the entire length region of the magnetic card 1. From 1a, the front clock area C1, the data area D, and the rear clock area C2 are written in this order. A start flag is written at the start position STX of the data area D and an end flag is written at the end position ETX.

Next, how to obtain the average total number of clocks by the function of the integrating means of the CPU 21 will be described.

Magnetic card 1 read by the reading head 17
The total number of read clocks in the full length area of is sequentially accumulated and stored in the RAM 23 for each writing / reading operation of the magnetic card 1. Then, for each writing / reading operation, a new reading total number of reading clocks is sequentially added, and a predetermined number of readings are moving averaged to obtain an average total number of clocks.

A concrete example is shown in FIG. 6, and the number to be averaged is 10
Assuming the number of times, as shown in FIG. 6 (a), until the 10th write / read operation, the total number of read clocks up to that number is divided by the number of times to obtain an average value, and the average value is calculated. The total number of clocks.

Then, as shown in FIG. 6B, when the total read clock number is obtained by the 11th write / read operation, the total read clock number of the second to 11th write / read operations is Divide the total number by 10 of the parameter to obtain the average value.

Further, as shown in FIG. 6C, when the total number of read clocks is obtained by the twelfth write / read operation, the total number of read clocks of the third to twelfth read / write operations is Divide the total number by 10 of the parameter to obtain the average value.

In this way, the average total number of clocks is obtained by sequentially adding the new total number of read clocks for each read / write operation and averaging a predetermined number of reads.

Next, how to obtain the number of correction clocks by the function of the calculating means of the CPU 21 will be described.

Correction coefficient CLK3 = CLK2 / CLK1 where CLK1 is the standard total number of clocks and CLK2 is the calculated average total number of clocks.
Ask for.

This correction coefficient CLK3 is used as the starting end of the magnetic card 1.
The standard clock number from 1a to the data writing start position STX is multiplied to obtain the correction clock number from the starting end 1a of the magnetic card 1 to the data writing start position STX. In addition, the correction factor
CLK3 is multiplied by the standard clock number from the sensor 15 to the write head 16 to obtain the corrected clock number from the sensor 15 to the write head 16.

Next, the writing / reading operation will be described with a specific example.

The standard value stored in the ROM 22 is, as shown in FIG. 7, the magnetic average recording density of the magnetic card 1 of 210 DP.
I, the length L1 of the magnetic card 1 is 241.9 mm, the length L2 from the starting end 1a of the magnetic card 1 to the data writing start position STX is 10 mm, and the number of clocks of the data area D is 1700.
bit.

Therefore, the standard total number of clocks written in the magnetic card 1 is 241.9 / 25.4 × 210 = about 2000 bits, and the standard number of clocks from the start end 1a of the magnetic card 1 to the data writing start position STX is 10. /25.4x
210 = about 83 bits. FIG. 8B shows the number of clocks in each area when the standard total number of clocks is 2000 bits. The front clock area C1 is about 83 bits, the data area D clock number is 1700 bits, and the rear clock area C2 is 217 bits. Becomes

Then, as shown in FIG. 8 (a), the average total clock number CLK2 obtained by the moving average is 2200bi.
If t, the correction coefficient CLK3 = 2200/200
0 = 1.1, and the number of correction clocks from the start end 1a of the magnetic card 1 to the data writing start position STX is 83 × 1.1.
= Approx. 91 bits. Since the number of clocks in the data area D remains 1700 bits, the rear clock area C2 has 409 bits.

Further, as shown in FIG. 8C, the average total clock number CLK2 obtained by the moving average is 1800 bits.
If it is, the correction coefficient CLK3 = 1800/2000
= 0.1, and the number of correction clocks from the start end 1a of the magnetic card 1 to the data writing start position STX is 83 × 0.9 =
It becomes about 75 bits. Since the number of clocks in the data area D remains 1,700 bits,
2 is 25 bits.

At the time of writing to the magnetic card 1, the data writing start position STX is set to a predetermined length from the starting end 1a by writing the data after the correction clock number obtained from the starting end 1a of the magnetic card 1. It is possible to write in the dimensional position.

When the data writing start position STX is verified, when the average total clock number CLK2 is 2200 bits, 241.9 / 2200 × 91 = 10.005 mm The average total clock number CLK2 is 1800 bits. In this case, 241.9 / 1800 × 75 = 10.08 mm, and the distance from the start end 1a of the magnetic card 1 to the data writing start position STX can be 10 mm.

Actually, from the sensor 15 to the writing head
The correction clock number corresponding to the standard clock number up to 16 is also obtained, and the start end portion of the magnetic card 1 conveyed by the conveying means 12
From the time when the sensor 15 detects 1a, the number of correction clocks from the sensor 15 to the write head 16 and the start end 1a of the magnetic card 1
To the data writing start position STX, the data writing start position STX can be written from the starting end portion 1a to a predetermined length dimension position by writing the data after the number of clocks obtained by adding the correction clock numbers. This is the case where the position of the sensor 15 and the write head 16 are apart from each other in the carrying direction. If the position of the sensor 15 and the write head 16 are at the same position in the carrying direction, the sensor 15 From write head
It is not necessary to find and use a correction clock number up to 16.

Further, the function of the variable means for changing the integration time constant by changing the averaging number (10 times in this embodiment) of the moving average, that is, the parameter, in association with the change rate of the read clock number. May be provided in the CPU 21. According to the function of this variable means, for example, when the rate of change of the number of read clocks is large, the integral time constant can be reduced by making the parameter of the moving average small, and it is possible to follow a rapid data change. On the contrary, when the change rate of the read clock number is small, by increasing the parameter of the moving average,
It is possible to increase the integration time constant, cope with the variation in the number of read clocks, and perform stable writing position correction.

That is, it can be expected that the rate of change in the number of read clocks is rapid until the stable operation area is reached immediately after the power source of the apparatus is turned on. Therefore, the integral time constant can be reduced by setting the parameter of the moving average to a small value. , Follow the rate of data change. After that, it is possible to perform stable writing position correction by gradually increasing the parameter of the moving average and increasing the integration time constant while determining the rate of change and the fluctuation range of the number of read clocks.

As described above, while controlling the parameter of the average movement, the average total number of clocks is obtained by the moving average of the total number of read clocks, and the magnetic field is calculated based on the ratio of the average total number of clocks to the standard total number of clocks. The number of correction clocks corresponding to the standard number of clocks from the start edge of the card to the data writing start position is obtained, and the motor 14 of the conveying means 12 rotates to automatically correct the data writing start position STX with this correction clock number. It is possible to deal with errors, aging, environmental changes such as temperature and humidity around the device, and issue the magnetic card 1 in which the data writing start position STX is written at a stable position.

Further, by taking the moving average, it is possible to cope with variations in the length of the magnetic card 1.

[0052]

According to the present invention, the average total number of clocks is calculated by moving and averaging a predetermined number of readings while sequentially adding new readings to the total number of reading clocks of the magnetic card read by the reading head. Based on the ratio of the average total number of clocks to the standard total number of clocks, the correction clock number corresponding to the standard clock number from the start end of the magnetic card to the data writing start position is obtained. It is possible to automatically correct the data so that the data is accurately written from a predetermined dimensional position based on the starting end of the.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a magnetic card data writing device of the present invention.

FIG. 2 is a schematic view of the mechanism of the data writing device of the above embodiment.

FIG. 3 is an explanatory diagram showing an example of a magnetic card of the data writing device of the embodiment.

FIG. 4 is a timing chart of a writing / reading operation by the data writing device of the embodiment.

FIG. 5 is an explanatory diagram of a format for writing to a magnetic card in the data writing device according to the embodiment.

FIG. 6 is an explanatory diagram for obtaining a moving average in the data writing device according to the embodiment.

FIG. 7 is an explanatory diagram showing a specific example of writing in a magnetic card in the data writing device of the above-mentioned embodiment.

FIG. 8 is an explanatory diagram illustrating correction of a writing position in the data writing device according to the embodiment.

[Explanation of symbols]

1 magnetic card 12 conveying means 15 sensor 16 writing head 17 reading head 21 C as integration means, calculation means and control means
PU 22 ROM as storage means

Claims (1)

[Claims] 1. A conveying means for conveying a magnetic card, a sensor for detecting a starting end portion of a magnetic card conveyed by the conveying means, and a starting end portion of a magnetic card conveyed by the conveying means is detected by the sensor. From the time when a clock is output and a predetermined number of clocks are followed to write data to the magnetic card, a read head for reading the contents written on the magnetic card carried by the carrying means, and a magnetic read by the read head. Integrating means for obtaining the average total clock number by moving average a predetermined number of read numbers while sequentially adding new read numbers to the total read clock number of the card; standard total clock number in the full length area of the magnetic card; Storage means for storing the standard clock number from the section to the data start position, and the average total clock number and the standard total clock number. A calculation means for obtaining a correction clock number corresponding to the standard clock number from the start end portion of the magnetic card to the data writing start position based on the ratio of the number of clocks to the magnetic card conveyed by the conveying means. And a control means for causing the write head to write data from the start end of the magnetic card after the number of correction clocks calculated by the arithmetic means, and a data writing device for a magnetic card.