JPS59211169A - Information retrieving method - Google Patents

Abstract

PURPOSE:To display no different item numbers between forward and backward retrieval modes by setting the count value of item marks at ''minus 1'' before the mark of the next information frame is detected when a microfilm is shifted in the reverse direction. CONSTITUTION:A microfilm is first shifted in the reverse direction at a low speed with a routine where the microfilm is shifted in the reverse direction from a state where an information frame K containing an item mark MC is retrieved. In this case, the mark MC is checked before the shift of the microfilm. If the mark MC is detected, the value of an item counter which counts the number of MC is set at ''minus 1''. While the microfilm is continuously shifted reverse without changing the contents of the counter. The contents of the counter are subtracted by one before the mark of the next information frame is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information retrieval method using a microfilm having piece marks and subject marks.

Such an information retrieval device uses, for example, a negative or positive microfilm as shown in FIG. 1(A). This microfilm 1 is connected to a starting end leader tape 1a that is latched to a take-up reel (not shown) and to a terminating end leader tape 1b that is latched to a reel in the cartridge. Mark (becomes a reset mark when returning) MS, end mark ME
It is attached.

A large number of information frames K, in which information is photographed and recorded at regular intervals, are arranged on the film 1 between the two marks, and a corresponding frame mark MK is attached to each information frame. A subject mark MC is attached corresponding to the first frame of the recorded information frame group (generally consisting of a plurality of frames, but one frame may contain information for one subject) KG.

Then, the information retrieval device detects the frame mark MK and subject mark MC of this microfilm 1, and performs a frame search (search for each frame) and case search (search for each group of information frames for one case).
○ In other words, send one information piece K + 1 piece key, move back 1 piece - 11 piece key, send 1 piece of information frame group KG + 1 piece key, move back 1 piece - 1 item key, numeric keypad for entering the piece number or item number you want to automatically search for, search key to start automatic search, changeover switch for piece search and item search, counter as a counting means for counting the piece number or item number, and It is equipped with a display to display the count value, and in the piece search mode, the counter counts the piece marks MK and displays the piece number on the display, and in the case search mode, the counter counts the piece marks MC and displays the piece number. Display on the display.

In either mode, you can forward and return one frame, and forward and return one item. In addition, you can automatically search by setting the frame number in the piece search mode and the item number in the item search mode with the numeric keypad in advance. is now possible.

In such an information retrieval device, in the case search mode, that is, the mode in which the counter counts the case marks and displays the case number (the number of the information frame group to which the retrieved information frame belongs) on the display, conventionally, the case mark is simply displayed. The counter was counted up or down depending on the detection.

So, for example, the information frame group KGs with item number 50 in Figure 1 (b). Suppose that the first piece of is searched for and stopped.

Then, when you operate the +1 item key, microfilm 1
is moved in the forwarding direction and stopped at 1 at the next item-marked information frame, that is, the first frame of the information frame group KGi+ with item number 51, and the count value of the counter is incremented by 1. Also, even if you operate the +1 piece key three times, the information piece will be changed to Kt + Ks + K.
: Send information piece number 51 KG! Add 1 to the counter value by adding 1 to the first piece of I.

Therefore, there is no problem at all when moving the microfilm 1 in the feeding direction.

However, if you move the microfilm l in the backward direction and search, for example, you search for 1 in the first frame of the information frame group KGs+ with item number 51 in Figure 1 (b), and then search for 11 items from the stopped state. When the key is operated, the microfilm 1 is moved in the return direction, and the count value of the counter is incremented by -1 only when the next item-marked information frame is reached.

Therefore, if you press the stop key (for example, with the information piece Kt) to stop the process, the actual case number is 5.
Even though it is 0, the count value of the counter remains 51, so the display also shows 51, which is different from the actual value.

Also, when you operate the -1 frame key, even if you operate it once and 3 is retrieved for the information piece, the counter count and display remain 51, and you operate it twice to retrieve information piece K.

Even if is retrieved, the value remains 51, and only when the information piece is retrieved after three operations, the counter value and display become 50.

As described above, there is a problem in that the case numbers of the same information frame group are displayed differently when the microfilm is sent and returned.

This invention was made to solve the above-mentioned problem, and when in the case search mode, the case number of the information piece without the case mark between the information piece with the case mark and the information piece with the case mark is not displayed. The purpose is to ensure that there is no difference between searching in the forwarding direction of microfilm and searching in the backward direction.

In a normal microfilm, the frame with the issue mark is the first page of a group of information frames for that one issue, and the frame before the next frame with the issue mark is the last page.

More strictly speaking, the area of interest is between the incident mark MC and the next MC.

Therefore, in the information frame group counting method according to the present invention, when the microfilm is moved in the backward direction by operating the 11 item key or the -1 frame key while the information frame with item mark is being searched, the next Before detecting the piece mark of the information piece, the count value of a counting means (counter) for counting the number of item marks is decremented by one.

Hereinafter, the present invention will be described in detail with reference to FIG. 2 and subsequent figures of the accompanying drawings.

FIG. 2 shows an operation panel of an information retrieval device embodying the present invention, and the operation panel 4 is provided with various switches, keys, dials, lamps, etc.

7 is a power switch to turn on and off the power to the entire machine; 14 is a +1 frame key to advance one frame of microfilm; 15 is an 11 frame key to return one frame; 16
17 is a stop key for stopping the movement of the film; and 18 is a clear key for clearing the number displayed on the number display 27.

19 is an internal RAM of the microcomputer which will be described later.
20 is a numeric keypad used to preset the number you want to search, and 21 is a rewind key to rewind the film. ,
22 is the +1 item key for advancing the film by one item, 23 is the 11 item key for returning the film by one item, and 24 is the manual dial for manually advancing and returning the film.

27 is a 4-digit 7-segment) numerical display consisting of LED,
Reference numeral 28 is an item search switch used when switching from the piece search mode to the item search mode.

Next, the film drive unit will be explained with reference to FIG.

A microfilm 1 is stored in a roll 51 within a cassette 50. Set the cassette 50 and press the search key 16. +1 piece key 14° +1 item key 22. By operating the manual dial 24 in the feed direction, the solenoid 52 is turned on, the thread roller 53 moves toward the film surface, and at the same time the drive motor 54 rotates.

The drive motor 54 rotates at three speeds: low speed, medium speed, and high speed. A detailed explanation of this speed will be given later.

In the above case, the film is fed at medium speed. Film l scraped out from inside the cassette 50 by the thread roller 53
enters between the drive roller 55 and the press roller 56.

When the film 1 is inserted between both rollers 55 and 56, a capstan switch (hereinafter referred to as "rCAP switch") is activated.
57 turns on.

When the CAP switch 57 is turned on, the solenoid 52 is turned off, and the film feeding force is applied from the drive roller 55. Then, the film 1 passes through the film gate 58 and is wound around the reel 59. 60 is a film holding arm.

Then, when the start mark is read by the mark detector described later, it will move from medium to high speed (search key when searching for pieces after the 20th frame) or low speed (+1 piece key, +1 item key, pieces within 19 pieces). (search key when searching).

Thereafter, when the mark detector detects a predetermined mark, the advance of the film 1 is stopped, and the lamp 34 is turned on to project the stopped frame.

The mark detection section is constructed as shown in FIG.

Then, the microfilm 1 is illuminated by the light of the lamp 34.
The piece mark Mic and the piece mark MC are mirror 61.6
2, is magnified (doubled) by lenses 63 and 64, is reflected by mirrors 65 and 66, and reaches a piece mark detector 67 and an object mark detector 68. The information on that piece is
The image passes through the projection lens 36 and is projected onto a screen or photoreceptor (not shown).

As shown in FIG. 5, the piece mark detector 67 is connected to the sensor A1.
．． A6. Equipped with BI, B, and mark detector 68
is equipped with sensors As and BS.

Each sensor is specifically a photodiode.

The piece mark detector 67 serves as a start mark detector and an end mark detector, and its sensors A, , B,
generates a piece mark signal for piece mark counting, and sensors A, , B and A, , B use start mark signal, end mark signal, and reset mark signal (the microfilm is sent in the return direction to detect the start mark. time).

Sensors As and Bm of the mark detector 68 produce mark signals.

The microfilm 1 shown in FIG. 1 is used.

FIG. 6 shows a film drive circuit and its input and output signals. The direction is controlled and the solenoid 520 is turned on and off in a controlled manner.

Table 1 shows the relationship between the input signal of the film drive circuit 70 and the film advancing direction and speed.

Table 1 Each input signal in FIG. 6 and the above Table 1 is as follows. Note that under the conditions marked in red in Table 1, the film was not fed.

GO: High speed signal MID: Medium speed signal DOWN:
Low speed signal REW: Return signal MSTP: Signal to stop the motor when using the manual dial.

CAPSW: An on/off signal for the CAP switch 57, which is turned on when the film is wedged between the drive roller 55 and press roller 56 in FIG.

MDS: A signal that changes the rotational speed of the motor 54 according to the position of the manual dial when it is moved.

On the other hand, the direction signal DS in the output signal is "1" in the forward direction and 1'' in the return direction.

In addition, the solenoid 52 is connected to the thread roller 5 shown in FIG.
3 is a solenoid that makes contact with film 1,
When the CAP switch 57 is off, the solenoid 52 is turned on, and when the CAP switch 57 is on, the solenoid 52 is turned off.

FIG. 7 is a diagram showing the relationship between the search control circuit and its input/output signals in this embodiment. This search control circuit 90 internally includes a central processing unit (CUP), a ROM as a program memory, and a data/output signal. A one-chip microcomputer with RAM, etc. as memory is used.

In the input system, on/off signals from each operation key or switch of the operation panel 4 shown in FIG. 2 are input. Note that the manual switch 91 is a switch that is turned on when the manual dial 24 shown in FIG. 2 is rotated.

The ninth frame switch 92 is a switch inside the machine, and is a frame number selection switch that changes the film speed from high speed to low speed during retrieval. The search control circuit 90
When the frame switch 92 is off, the speed is switched to low speed before 19 frames, and when it is on, the speed is switched to low speed before 9 frames.

However, even if this 9th frame switch 92 is off, when the item search switch 28 is on, the switch is set before the 9th frame.
Signals from both switches are inputted via an R gate 93.

Further, from the film drive circuit 70 in FIG. 6, a direction signal DS indicating the feeding direction of the microfilm and a CAP indicating whether or not the microfilm is loaded
A switch on/off signal is input.

Further, the output signals of the sensor As v Bt t At -Bt of the piece mark detector 67 and the sensors As and B3 of the subject mark detector 68 shown in FIGS. 4 and 5 are respectively input to the mark preprocessing circuit 95. to determine each mark, start mark signal, end mark signal.

Reset mark signal (start mark detection signal when microfilm is fed in the return direction).

A piece mark signal and a subject mark signal are output and input to the search control circuit 90.

The positive switch 96 is a switch that is turned on when the loaded microfilm is positive and turned off when it is negative.As an output system, it outputs each film drive related output to the film drive circuit 70 in FIG. As, MID (medium speed)
, GO (high speed), DOWN (low speed), REW (return),
Outputs MSTP (motor stop during manual) signals.

Also, in the piece inspection purple mode, piece number data is output, and in the item search mode, item number data (counted value by a counter in RAM or input value by a numeric keypad) is output, decoded by a decoder 98, and outputted by a 7-segment LED. It is displayed on the digit number display 27. In that case, the switching signal S
C, each digit of the numeric display 27 is dynamically displayed in sequence.

Next, only the parts related to this invention during the operation of the search control circuit shown in FIG. 7 will be explained using the operation flowcharts shown in FIGS. 8 and 9. FIG. 8 shows an outline of the main routine. , when the power switch 7 in FIG. 2 is turned on, the process starts from the start.

Then, first check whether the numeric keypad 20 is on, and if YES, jump to the numeric value routine and press the numeric keypad 20.
The number placed in the display register by is preset in the υ counter by turning on the preset key 19.

If the numeric keypad 20 is not operated, then search key 16. +1 piece key 14. -1 piece key 15, +1 item key 2
2. -1 item key 23. Check the manual switches (switches that are turned on by rotating the manual dial 24) in sequence, and if any of them is operated and turned on,
Search routine, +1 piece routine, -1 piece routine, +
Proceed to one of the 1 item routine, -1 item routine, and manual routine, and perform automatic search, forward 1 frame, go back 1 frame, forward 1 item, and return 1 item, respectively.

Performs search processing using manual dial.

Note that the rewind routine and the like are not shown.

Among these processing routines, there are routines that move the microfilm in the backward direction from the state where the information frame with the item mark is being searched, namely the -1 frame routine, the -1 item routine, and the routine that places the number in the backward direction. In the search routine when the number is counted and the manual routine when the manual dial is turned in the reverse direction, the MSR shown in FIG.
UTN operations are performed.

In Jin's MS RUTN, first go to the output port.
=1. DOWN=1. Output REW=1 to move the microfilm in the return direction at low speed. Before moving, the subject mark is checked, and if there is a subject mark (the subject mark has been detected by the subject mark detector 68), the value of the subject mark counter that counts the subject mark is decremented by 1, and the main routine shown in Fig. 8 is executed. If there is no mark, the contents of the counter are not changed and the process returns to the main routine of FIG. 8 to continue the film return operation. In this case, the operation of decrementing the contents of the item counter by 1 is performed when the search key 16, -1 frame key 14, -1 item key 23 is pressed or when the film is moved in the return direction, and at least the following information is This is done before the piece's mark is detected.

In each routine, the contents of the item counter and frame counter are incremented by 1 while the film is being moved, and each time the item mark and frame mark are detected while the film is being moved in the feeding direction, the contents of the item counter and frame counter are incremented by 1.

2. When the film is being moved in the return direction, each time a frame mark or frame mark is detected, the contents of the frame counter and the frame counter are decremented by 1, respectively.

Note that if the case counter is decremented by 1 by the operation of MSRUTN shown in Figure 9 at the start of movement in the return direction, the contents of the case counter will not change the next time the case mark is detected, but the case mark will be detected after that. Each time, the content of the case counter is decremented by 1.

As a result, for example, when the information frame group with case number 51 in FIG. −
If the 1 frame key (or -1 item key) is pressed, the contents of the item counter will be changed to -1 frame key (or -1 item key).
1 to 50, and then it is moved back one frame and the information piece is detected. Even if the piece mark is detected, the contents of the counter do not change (
Even if the subject mark is detected in the information frame after being moved back three frames, the content of the subject counter remains unchanged.

Also, when the film is moved in the return direction, M in Figure 9
If the counter is decreased by 1 due to SRUTV operation,
Each time a frame mark or a frame mark is detected, the contents of the frame counter and frame counter are decremented by 1, and if a frame mark is detected when the film stops, the content of the frame counter is incremented by 1, and the frame mark is The contents of the counter may not be changed when the event counter is not detected.

As mentioned above, when the microfilm is moved in the backward direction from the state where the information piece with the item mark is being searched in the item search mode (the counting means counts the item marks), the next information arm is moved. The count value of the counting means is decremented by 1 before detecting the frame mark, so that the count value matches the actual information frame group number (case number) even when reversing the film. You can know correctly.

[Brief explanation of the drawing]

FIGS. 1(A) and 1(B) are explanatory diagrams showing examples of microfilms used in the information retrieval apparatus to which the present invention is applied. FIG. 2 is a plan view of the operation panel of a search device according to an embodiment of the present invention, FIG. 3 is a configuration diagram of the film drive unit, FIG. 4 is a configuration diagram of the mark detection section, and FIG. This figure is an explanatory diagram showing the frame mark detector and subject mark detector in Fig. 4 in correspondence with the frame mark and subject mark on the microfilm, and Fig. 6 shows the relationship between the film drive circuit and its input/output signals. 7 is an explanatory diagram showing the relationship between the search control circuit and its input/output signals; FIGS. 8 and 9 are explanatory diagrams illustrating the operation of the search control circuit in FIG. 7 related to the present invention. This is an operation flow diagram for 0 1--° microfilm K... information piece KG.
...Information piece group MK...piece mark MC...
Item mark. Procedural amendment (voluntary) Director of the Patent Office Kazuinu Wakasugi 1, Indication of the case 1986 Patent Application No. 86295 2, Information search method for the name of the invention 3 Relationship with the person making the amendment Patent application Office Tokyo 3-30-2 Shimomaruko, Ota-ku Name (+00) Canon Co., Ltd. Representative Ryu Kaku 3rd Department 5, Specification subject to amendment 6, Contents of amendment (1) Page 20, line 4 of the specification: ``Can be done. Even if you use film with item marks that do not have frame marks, you can correctly know the item number of the information you are searching for.''

Claims (1)

[Claims] The frame mark attached to each information frame on the microfilm and the item mark attached to the first frame of each information frame group are detected, and the desired information frame is searched. In order to display the number of the information frame group to which the information frame belongs, in an information retrieval device equipped with a counting means for counting the number of subject marks, the microfilm is moved in the backward direction from the state where the information frame with the subject mark is being searched. An information retrieval method characterized in that, when the information frame is moved to the next information frame, the count value of the counting means is decremented by one before detecting the mark of the next information frame.