JP2761914B2 - Information recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus using a short sheet-like information medium such as a card, a passbook, a cut sheet, and the like. The present invention relates to an information recording / reproducing apparatus suitable for preventing occurrence of an error in recorded information or reproduced information due to an error.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. Sho 59-211170, a conventional information recording / reproducing apparatus calculates the position of the information at the time of recording / reproducing from the output time interval of the output information, and conveys the transport position and transport speed of the information medium. This prevents errors in interpreting the extracted information caused by variations in the information.

In a commercially available VTR, a reference signal (CTL signal) indicating a starting position of an image on a screen is recorded on a magnetic tape at the same time as an image signal so that the timing of extracting the image does not shift. The rotation speed of the magnetic head is controlled by the reference signal so that a video signal can be taken out at a predetermined position on the tape during video reproduction.

In addition, as described in the microfilm of Japanese Utility Model Application Publication No. 56-60267, a rotating body driven by a roller that rotates in conjunction with the running of an information medium, and detects the rotation and outputs a clock signal at regular intervals. A rotation detecting means for detecting a distance from an end of the information medium to a position at which information reading is started when a predetermined number of clock signals are input, and a counter for outputting a signal, and information according to an output signal from the counter. There has been known an information reproducing apparatus including a reproducing unit that starts reading information recorded on a medium.

[Problems to be solved by the invention]

The technique disclosed in Japanese Patent Application Laid-Open No. Sho 59-211170 is currently effective between mutually compatible devices having a common processing format. If the card is not conveyed, it will not be recorded correctly on the card. Therefore, in an incompatible model, for example, an apparatus having no control means for correcting output information, even if the card is conveyed at a predetermined speed in the apparatus, the card is already recorded on the card. Since information is recorded after an lapse of an incorrect time, a reading error occurs.

In the conventional apparatus, if the speed of the information medium drive roller is accurately controlled, it is thought that the information medium can be transported at a constant transport speed.However, the information medium such as a card is not necessarily in a constant correct shape, and is warped. Some of them have been broken, and some of them have slippery surfaces due to moisture or oily dirt. In such a card, even if the speed of the drive roller (drive motor) is controlled to be constant, the card is not necessarily conveyed at a constant speed.

In addition, the VTR controls the image capture timing, but does not consider the time interval between the individual pieces of information that make up the image. An error occurs, and the image obtained from the extracted information is distorted.

Furthermore, in a method such as that disclosed in Japanese Utility Model Publication No. 56-60267, only the clock signal is counted and the start position of information reproduction is detected. In the case where is slippery due to moisture or oily dirt, a reading error may occur at a position after the information reproduction start position.

An object of the present invention is to provide an information recording / reproducing apparatus capable of obtaining highly reliable data without recording or reading errors at the time of information recording or reproduction due to a transport state such as uneven transport speed of an information medium such as a card. It is.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a conveying means for conveying a sheet-like information medium such as a card, a passbook, and a cut sheet, and recording information on the information medium in a conveying state by a magnetic method or a printing method. Alternatively, in an information recording / reproducing apparatus including recording / reproducing means for reproducing information from an information medium, an encoder for directly detecting the transport state of the information medium, and a position and speed of the information medium by comparing a detection signal from the encoder with a reference clock signal And speed control for changing the recording timing of the information on the information medium or the reproduction timing of the information from the information medium to the recording / reproducing means according to the position and velocity signals from the position / velocity computing means. And an information recording / reproducing apparatus provided with means.

In order to achieve the above object, the present invention also provides a conveying means for conveying a sheet-like information medium such as a card, a passbook, a cut sheet, and the like. In an information recording / reproducing apparatus including a recording / reproducing means for recording or reproducing information from an information medium, an encoder for directly detecting a transport state of the information medium,
Position and speed calculating means for comparing the detection signal from the encoder with a reference clock signal to calculate the position and speed of the information medium, and a transfer speed for changing the transfer speed of the transfer means according to the position and speed signals from the position and speed calculation means An information recording / reproducing apparatus including a control unit is proposed.

In order to achieve the above object, the present invention further provides a conveying means for conveying a sheet-like information medium such as a card, a passbook, a cut sheet, and the like. In an information recording / reproducing apparatus including a recording / reproducing means for recording or reproducing information from an information medium, an encoder for directly detecting a transport state of the information medium,
Position / speed calculating means for calculating the position and speed of the information medium by comparing the detection signal from the encoder with the reference clock signal; and partially compressing or expanding the time in accordance with the position and speed signals from the position / speed calculating means. An information recording / reproducing apparatus including input / output time control means for driving the recording / reproducing means is proposed.

[Action]

In the present invention, an encoder for directly detecting the transport state of the information medium, position / speed calculating means for comparing a detection signal from the encoder with a reference clock signal to calculate the position and speed of the information medium, and It has input / output time control means for changing the recording timing of the information on the information medium or the reproduction timing of the information from the information medium to the recording / reproducing means in accordance with the position and speed signals,
Conventionally, the speed of the information medium itself, which did not always become a constant transport speed even if the speed of the transport means such as the speed of a motor was controlled due to the warpage of the card or the slippage of the surface, was detected in real time. An error countermeasure against the deviation of the transport speed can be executed accurately and sufficiently.

Further, by changing the time interval between information to be input according to the transport speed and position of the information medium, predetermined information can be recorded at a predetermined position of the information medium, and the transport speed when reproducing information from the information medium and the like. Since the positioning margin is increased, an information reading error can be prevented.

Further, at the time of reading, the time interval of the read information can be corrected and reproduced as output information when the transport speed and the position are in a predetermined state. Therefore, in this respect, an error in reading the information can be prevented.

Position / speed calculating means instead of input / output time control means for changing the recording timing of information on the information medium or the reproduction timing of information from the information medium to the recording / reproducing means in accordance with the position and speed signals from the position / speed calculating means And a motor rotation control circuit for changing the transfer speed of the transfer means in accordance with the position and speed signals from the controller, and the input / output time control means and the motor rotation control circuit may be provided together.

In other words, the input / output time control means is means for driving the recording / reproducing means while partially compressing or expanding the time in accordance with the position and speed signals from the position / speed calculation means.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing a configuration of an embodiment of an information recording / reproducing apparatus according to the present invention. In the figure, roller 1
Is rotatably supported, and its shaft is
Pressed to the side. The roller 3 is driven to rotate by a motor 10. The roller 4 is rotatably supported, and an encoder 11 is attached to its shaft. The encoder 11 is lightly pressed against the roller 6 by a spring 5 via a bearing (not shown). The roller 6 is rotatably supported. The roller 7 is rotatably supported, and its shaft is lightly pressed against the roller 9 by a spring 8. Although the shaft of the roller 9 is not shown in detail, a belt is stretched between the shaft of the roller 3 and the shaft of the roller 3 so as to be driven to rotate by the motor 10. The magnetic head 12 is supported by a spring 15. The entrance of the magnetic card 13 is wide so that the guide 14 can guide the magnetic card 13.

Position speed calculation circuit 21 takes in the output of the encoder 11 is compared with the pulse signal of a fixed time interval [Delta] T _o from a reference clock signal source 20, it calculates the position and speed of the magnetic card. The output of the position / speed calculation circuit 21 sends a command for controlling the rotation speed to the motor 10 via the motor rotation control circuit 22 and the motor drive circuit 23.

The position / speed operation circuit 21 converts the position / speed signal from the encoder 11 into a magnetic card position / speed and sends it to the input / output time control circuit 25. The input / output time control circuit 25 uses those signals as inputs for controlling the time interval (timing) of input information or output information. The input information whose timing has been changed is sent to the magnetic head 12 via the recording circuit 24. On the other hand, the information read by the magnetic head 12 is:
The timing is changed by the input / output time control circuit 20 via the reproduction circuit 24, and is extracted as output information.

FIG. 2 is a diagram showing a procedure for controlling the input timing of information by controlling the time interval of the input information. In FIG. 2, the time during which an output pulse is obtained from the encoder 11 is indicated by t _i . When the magnetic card 13 enters between the rollers 4 and 6 with a encoder 11, the roller 4 is rotated, the output pulses of the encoder 11 starts out with time T _o. If the magnetic card 13 advances by Δx while the roller 4 is in contact with the magnetic card 13, the output pulse of the encoder 11 is output every ΔT _o time. Therefore, the speed V _i of the magnetic card 13 at time t is represented by times t _i and t _il, and the time t _{i + l at} which the next output pulse is output
Together represented by V _i determined the speed of the magnetic card 13 immediately before up to the position X of the [Delta] T _n times after the magnetic card 13 at time t
X = Δx · i + Δx · ΔT _n / (t _i −t _il ).

In output time control circuit 25, the input information is a time t _j
If it contains the information in, so that the magnetic card 13 at time t is input information of the time t _j in the position X _j to be reached at a predetermined speed is recorded, the time the magnetic card 13 comes to the position X _j t 'predict just before, the input information of the time t _j time t _{j' j} varying the time interval of information as information. That is, t _j ′ = t _i + α (t _i and t _il ) + T _o , where t _j = ΔT · (j + α) + T _o , 0 <α ≦ 1 Further, FIG. FIG. 7 is a diagram illustrating output timing of information. As the transport speed of the magnetic card 13 increases, the output timing of the output information read by the magnetic head 12 increases. Therefore, when the transport speed of the magnetic card 13 increases, the time interval control of the output information is executed, and the output timing of the output information is delayed so as to be close to a predetermined output timing. That is, when the output timing of certain information by the magnetic head 12 and t _j, seek time t _j distance X advanced magnetic card 13 from the time T _o, the magnetic card 13
Is transported at a predetermined speed, a time t _j ′ for traveling the distance X is obtained, and the output information is controlled by the input / output time control circuit 25 so that the above-mentioned certain information is output at the time t _j ′. To control the time interval. _Assuming that the time t _j is at α × (t _{i + l} −t _i ) between the time t _i and the time t _{i + l} , the magnetic card
The 13 advanced distance X is represented by X = (i−l + α) × Δx. Therefore, the time t _j ′ to be newly set is t _j ′ = X / (ΔX / ΔT _o ) = (i−l + α) × ΔT _o .

FIG. 4 is a diagram showing a speed control method of the magnetic card 13. The output timing t of the encoder 11 is represented by a reference clock signal t _j ′ at which an output pulse is output at a time interval ΔT _o , a time delay ΔT _z between output pulses of the encoder 11 is calculated, and in order to recover this time delay ΔT _z And correct the motor input current. That is, the input current I is set to I = I _o + β · ΔT _z . Here, _Io is a constant current, and β is a correction constant. The input current controls the rotation speed of the motor 10 to change the transport speed of the magnetic card 13.

With the above configuration and operation, if the transport speed of the magnetic card 13 deviates from the predetermined value, the transport speed of the magnetic card 13 is corrected, and even if the transport speed cannot be corrected, the input information is transferred to the magnetic card 13. Can record near 13 regular positions,
The output information can also be output in a form close to the state in which the magnetic card 13 is transported at a predetermined speed.

Therefore, the input and output of information to and from the magnetic card 13 are performed in a predetermined form, and the finally reproduced information is correctly recognized as position information on the magnetic card 13.

〔The invention's effect〕

According to the present invention, the position information of the information medium such as the magnetic card is finally reproduced without being affected by the transport state of the information medium, so that the position information can be correctly understood and a reading error can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of an information recording / reproducing apparatus according to the present invention, FIG. 2 is a diagram showing a procedure for controlling input timing of information by time interval control of input information, and FIG. FIG. 4 is a diagram showing an output timing of information by the interval control, and FIG. 4 is a diagram showing a speed control method of the magnetic card 13. 1,3,4,6,7 …… Roller, 2,5,8… Spring, 10… Motor,
11 Encoder, 12 Magnetic head, 13 Magnetic card, 14 Guide, 20 Reference clock signal source, 21
Position / speed calculation circuit, 22 ... Motor rotation control circuit, 23 ...
Motor drive circuit, 24 ... Recording / reproducing circuit, 25 ... Input / output time control circuit.

Claims (3)

(57) [Claims] 1. A transporting means for transporting a sheet-like information medium such as a card, a passbook, a cut sheet, etc., and recording information on the information medium in a transported state by a magnetic method or printing, or information from the information medium. An information recording / reproducing apparatus including a recording / reproducing means for reproducing the information medium, an encoder for directly detecting a transport state of the information medium, and a detection signal from the encoder being compared with a reference clock signal to calculate a position and a speed of the information medium. Position / speed calculating means, and an input / output time for changing the recording timing of the information on the information medium or the reproduction timing of the information from the information medium to the recording / reproducing means in accordance with the position and speed signals from the position / speed calculating means. An information recording / reproducing apparatus comprising: a control unit. 2. A transport means for transporting a sheet-like information medium such as a card, a passbook, a cut sheet, etc., and recording information on the information medium in a transported state by a method such as magnetic method or printing, or information from the information medium. An information recording / reproducing apparatus including a recording / reproducing means for reproducing the information medium, an encoder for directly detecting a transport state of the information medium, and a detection signal from the encoder being compared with a reference clock signal to calculate a position and a speed of the information medium. An information recording / reproducing apparatus, comprising: a position / speed calculating unit that performs the control; and a conveying speed control unit that changes a conveying speed of the conveying unit according to a position and speed signal from the position / speed calculating unit. 3. A transport means for transporting a sheet-like information medium such as a card, a passbook, a cut sheet, etc., and recording information on the information medium by a method such as a magnetic method or printing in a transport state, or information from the information medium. An information recording / reproducing apparatus including a recording / reproducing means for reproducing the information medium, an encoder for directly detecting a transport state of the information medium, and a detection signal from the encoder being compared with a reference clock signal to calculate a position and a speed of the information medium. And an input / output time control means for driving the recording / reproducing means while partially compressing or expanding the time in accordance with the position and speed signals from the position / speed computing means. Information recording and reproducing apparatus.