JPH0766312B2 - Information storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an information storage device using a recording medium that reciprocates.

[Prior Art] In recent years, a card-shaped recording medium that is small and convenient for carrying has been considered. When this card-shaped recording medium is reciprocally moved to transfer the information to be recorded from the host computer to the storage device and record the information, the information is transferred and stored in the memory while reading the information from the memory. However, there is a drawback that a plurality of sets of memories are required and the recording device side cannot perform other processing during transfer.

[Object] The present invention has been made in view of the above points, and an object of the present invention is to provide an information storage device capable of efficiently transferring information with a small memory.

That is, according to the present invention, a recording / reading head for recording information on a recording medium having a plurality of information recording tracks and reading the information from the recording medium, the recording medium and the recording / reading head, and the information recording track are provided. First moving means for moving the recording medium and the recording / reading head relative to each other at a constant speed, and second moving means for moving the recording medium and the recording / reading head relatively in a direction traversing the information recording track. Input means for inputting information to be recorded on the information recording track of the recording medium, memory for temporarily storing the information input by the input means, the recording medium and the recording by the first moving means. The read head is relatively moved in the first direction at a constant speed, the information stored in the memory is read during the movement, and the read information is read by the recording read head. Recording on a first information recording track of the recording medium, and thereafter the first moving means moves the recording medium and the recording / reading head at a constant speed in a second direction opposite to the first direction. Move it relative to the first
Information is read from the first information recording track by the recording / reading head in order to check whether or not the information is correctly recorded on the information recording track, and when the information is correctly recorded, the recording medium and the recording / reading head are read. After the relative movement speed shifts to the deceleration state, a transfer request for information to be recorded on the second information recording track is output, and the information input from the input means in response to the transfer request is stored in the memory, The recording / reading head is moved to the second information recording track, and the recording medium and the recording / reading head are relatively moved at a constant speed in the first direction by the first moving means, and stored in the memory. And a recording control means for recording the read information on the second information recording track by the recording / reading head. Located in.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic plan view of an optical card applicable to the present invention. In the figure, an optical card 1 has a clock track on which a clock signal is recorded and which is formed into intermittent broken lines.
2 ₁ , 2 ₂ , 2 ₃ , ... And a continuous line-shaped tracking track 3 ₁ , 3 _2, ... Are alternately arranged at equal intervals. Recording tracks 4 ₁ , 4 ₂ , 4 ₃ , ... For recording data for each track are provided.

FIG. 2 is a block diagram showing the structure of the information recording apparatus in this embodiment.

This optical card 1 is a mounting table fixed to an endless belt 20.
It is mounted on 31. The belt 20 is stretched over the pulleys 29 and 30, and is moved by the motor 21 in the direction of arrow a or b. Accordingly, the optical card 1 is also moved in the direction of a or b.

The optical head 33 includes a semiconductor laser 11, a collimator lens 12,
Diffraction grating 13, objective lens 14, reflection mirror 15, objective lens
16 and photodetectors 17 to 19.

It is detected by the detector 15. The signals detected by the photodetectors 17 to 19 are a signal demodulation circuit 22, a tracking control circuit 23,
The focus control circuit 24 is sent to the focus control circuit 24.
The tracking control circuit 23 moves the objective lens 14 in the optical axis direction and in the direction perpendicular to the optical axis to perform auto focusing (AF) and auto tracking (AT).

A stepping motor 28 moves the optical head 33 in a direction perpendicular to the paper surface, thereby moving the irradiation position of the light beam and performing track access (seek operation). The motor 21 is controlled by a motor drive circuit 25 to move or stop the optical card. Further, 35 and 36 are sensors for detecting the inverted position of the mounting table 31, and are composed of a micro switch or a photo interrupter. Inversion sensor 35,3
When the mounting table 31 is detected by 6, a detection signal is sent to the motor drive circuit, and the CPU 26 drives the motor 21 in the reverse direction. 27 is a memory. Reference numeral 37 is an interface for controlling the input / output of signals with the host side (not shown).

FIG. 3 is a perspective view showing a part of the configuration of the data recording / reproducing apparatus for carrying out the present invention. Here, a beam emitted from a light source 11 such as a semiconductor laser is collimated by a collimator lens 12 and divided into three beams by a circuit grating 13. These beams are imaged on the optical card 1 by the objective lens 14 to form beam spots S ₁ , S ₂ and S ₃ , respectively. Here, the optical card 1 is moved in the direction of arrow a or b by the driving means 25, and is scanned by the beam spot in the extending direction of the tracking track and the clock track.

The reflected light from the beam spots S ₁ , S ₂ , and S ₃ passes through the objective lens again, is reflected by the mirror 15, and is projected by the condenser lens 16 onto the photodetectors 17, 18, and 19 placed on the focal plane, respectively. To be done. These photodetectors are arranged side by side in the Z direction shown in the figure. The entire optical system is moved in the direction of arrow c by the stepping motor 28.

FIG. 4 is an enlarged view of an optical card recording surface for explaining the operation when recording data using the apparatus of FIG. First,
When information is recorded on the recording tracks 4 _1, Supotsuto
S _1, S _2, S ₃ respectively Kurotsukutoratsuku 2 _1, recording tracks 4 _1, it irradiates the tracking Tora poke 3 _1. These spots are scanned in the arrow d direction by the movement of the optical card 1 in the a direction as described above. The reflected light from the spot S ₁ is incident on the above-mentioned photodetector 17, and the clock signal is reproduced. Further, the reflected light from the spot S ₃ enters the photodetector 19, and the tracking signal is detected by a known method such as the so-called push-pull method. Then, data is recorded in the d direction by the spot S ₂ . At the time of returning in the e direction, the recorded data is read to confirm (verify) whether there is an error. It is recorded on other recording tracks in the same manner.

FIG. 5 shows the operation of reproducing the data recorded as described above using the same device.

Supotsuto S _1, S _2, S ₃ are each recording track 4 _1, tracking Tora poke 3 _1, it is irradiated on the recording track 4 _2, the optical card a
The optical card 1 is scanned in the direction of arrow d by moving in the direction. Then, while detecting the tracking signal by the photodetector 18 corresponding to the spot S ₂ , the data recorded in the recording tracks 4 ₁ and 4 ₂ are recorded by the photodetectors 17 and 19 corresponding to the spots S ₁ and S ₃ , respectively. Play in rows simultaneously. Next, Supotsuto S _1, S _2, S ₃ and recording tracks 4 _3, tracking Tora poke 3 _2, was irradiated on the recording track 4 _4, by moving the optical card in the b direction, the Supotsuto each in the direction e To scan. Then, while the photodetector 18 performs tracking detection, the data recorded in the recording tracks 4 ₃ and 4 ₄ are simultaneously reproduced by the photodetectors 17 and 19. By repeating such an operation, the data recorded in a plurality of columns can be read out at high speed in two columns without idling.

In this embodiment, since the two-line simultaneous reading system is used, two line buffers are prepared as shown in FIG.
For example data read from the recording tracks 4 ₁ in FIG. 5 is demodulated by the demodulating circuit 22-1 line buffer 101
Is stored in the data read from the recording tracks 4 ₂ are stored in the line buffer 102 is demodulated by the demodulation circuit 22-2. The switches 104 are sequentially switched and output from the line buffer to the interface 37. When the data is stored in the line buffers 101 and 102, the address counters 105 and 106 respectively control the data. The address counters 105 and 106 count up and count down by clocks, and the preset values are set by the registers 107 and 108. When reading in the d direction, scanning is performed in the same direction as the writing direction, so the address counter is incremented. However, when reading in the e direction, scanning is performed in the opposite direction to the writing direction, so the data is read in the opposite direction and stored in the line buffer in the opposite direction. When reading from the line buffer, the address counter is decremented from the preset value to read in the direction opposite to the storage direction in the line buffer, and the data is output in the correct order. In addition to the method of decrementing from the preset value, an incremented value may be held and decremented from that value.

FIG. 7 is a time chart showing how information is read from the optical card and transferred to the host side.

First, when a data read command is input from the host side, the moving speed of the card becomes a constant speed, and when the optical head reaches the recording area, two tracks of data are simultaneously read from the card and demodulated by the method described above. Then, it starts storing in the buffer memory (t _A1 point). At this time, the line buffer and the address counter are cleared. As the contents of the data stored in the line buffer, preamble data for applying a PLL, sync mark for cueing the data, recording data, and postamble data for applying a PLL at the time of backward reading are stored. Then, the optical head reaches the outside of the recording area, and the writing of data to the buffer memory is completed (t _B1 point). Then, the contents of the buffer memory are read, the sync mark is detected, and the recording data is ready for immediate transfer (t _C1 point).
In this state, the interface waits for a transfer request signal from the interface. When there is a transfer request, the print data is read from the buffer memory 101, the print data is subsequently read from the buffer memory 102, and the data is directly transferred to the memory on the host side (t _D1 point). Then, all the recorded data in the buffer memory is read out and the transfer is completed (t _E1 point). Then, even when the card is returned, the recording data is transferred when the card is reversed by the same method as described above.

FIG. 8 is a block diagram for recording data on the optical card, which is a partial detailed view of the block diagram of FIG. The recording data is sent from the host side, stored in the buffer memory 111, modulated by the signal modulation circuit 112, sent to the laser drive circuit 32, and recorded on the card by the laser beam. Note that writing to the buffer memory is controlled by the address counter as in the case of the above-mentioned reproduction.

FIG. 9 is a timing chart showing how data is recorded on an optical card. First, a data transfer command is sent from the host side to this device side, and then data is transferred. Then, this data starts to be stored in the buffer memory 111 (t _F point). At this time, the buffer memory and the address counter are cleared. When the optical head reaches the recording area, the data is recorded on the optical card while reading the data from the buffer memory in synchronization with the recording speed (tG
point). At this time, the preamble data, sync mark, and postamble data described above are also recorded. When the optical head reaches the outside of the recording area and the writing is completed, the same data as the one just recorded is transferred again from the host side and stored in the buffer memory 111 (tH point). Then, when the optical head reaches the recording area when the optical card returns, the data recorded on the optical card is read and stored in the buffer memory 101 (point _I ). The card feeding speed during reading is much faster than the card feeding speed during recording. Then, when the optical head reaches the outside of the recording area of the card and the reading is completed, the contents of the buffer memory 111 and the contents of the buffer memory 101 are compared. Get the transfer from the host side. (T
J). If they do not match, the same data is transferred again and the data is recorded again in the next track. Since the data is written in the buffer memory 101 in the opposite direction, the address counter is decremented at the time of reading and the data is read in the correct direction.

[Effects] As described above, according to the present invention, the recording medium and the recording / reading head are relatively moved in the first direction at a constant speed by the first moving means, and are stored in the memory during the movement. The information is read, the read information is recorded on the first information recording track of the recording medium by the recording / reading head, and then the recording medium and the recording / reading head are moved to the second direction opposite to the first direction by the first moving means. When the information is correctly recorded by reading the information from the first information recording track by the recording / reading head in order to check whether or not the information was correctly recorded on the first information recording track by moving the recording medium in the direction of at a constant speed. After the relative movement speed of the recording medium and the recording / reading head shifts to a decelerating state, a transfer request for information to be recorded on the second information recording track is output, and the input means responds to the transfer request. The inputted information is stored in the memory, the recording / reading head is moved to the second information recording track, and the first moving means relatively moves the recording medium and the recording / reading head in the first direction at a constant speed, By reading the information stored in the memory and recording the read information on the second information recording track by the recording / reading head, it is possible to efficiently transfer a plurality of information to be recorded, and The number of required memories can be reduced.

[Brief description of drawings]

The first is a schematic plan view of an optical card applicable to the present invention, the second
The figure is a block diagram showing the configuration of the optical card reader / writer,
FIG. 3 is a perspective view showing a partial configuration of an optical card reader / writer, FIG. 4 is an enlarged view of an optical card recording surface for explaining the operation at the time of recording data, and FIG. 5 is a view at the time of reproducing data. FIG. 6 is an enlarged view of the recording surface of the optical card for explaining the operation, FIG. 6 is a block diagram showing a structure for reproducing and transferring data from the optical card, FIG. 7 is a time chart during data reproduction, and FIG. 8 is an optical card. FIG. 9 is a block diagram showing a structure for recording data on the recording medium, and FIG. 9 is a time chart for recording the data. In addition, 1 is an optical card, 22 is a signal demodulation circuit, 112 is a signal modulation circuit, and 101, 102 and 111 are line buffer memories.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Minoura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP 59-180626 (JP, A) Actual development Sho 57 -118524 (JP, U)

Claims (1)

[Claims] 1. A recording / reading head for recording information on a recording medium having a plurality of information recording tracks and reading information from the recording medium, the recording medium and the recording / reading head on the information recording track. First moving means for relatively reciprocating along the same at a constant speed, second moving means for relatively moving the recording medium and the recording / reading head in a direction traversing the information recording track, and the recording. Input means for inputting information to be recorded on the information recording track of the medium, memory for temporarily storing the information input by the input means, and the recording medium and the recording read by the first moving means. The head and the head are moved relative to each other at a constant speed in the first direction, and the information stored in the memory is read during the movement,
The read information is recorded on the first information recording track of the recording medium by the recording / reading head, and then the first information recording track is recorded.
Whether the information is correctly recorded on the first information recording track by moving the recording medium and the recording / reading head by a moving means in a second direction opposite to the first direction at a constant speed. In order to check whether or not the information is read from the first information recording track by the recording / reading head, and if the information is correctly recorded, the relative moving speed of the recording medium and the recording / reading head shifts to a deceleration state,
A transfer request for information to be recorded on the second information recording track is output, the information input from the input means in response to the transfer request is stored in the memory, and the recording / reading head is connected to the second information recording track. The recording medium and the recording / reading head are relatively moved in the first direction at a constant speed by the first moving means, the information stored in the memory is read, and the read information is read as described above. An information recording apparatus comprising: a recording control unit that records on the second information recording track by a recording / reading head.