JPS61246875A - Microfiche retrieving device - Google Patents

Abstract

PURPOSE:To eliminate the useless time for retrieval and the fatigue of operator's eyes by moving a microfiche during the prescribe period when a blank frame is detected while a microfiche is moved after it is stopped at the prescribed time projecting position by frame. CONSTITUTION:There is an X direction carrier table 22 on a carrier base stand 21, and thereon an Y direction carrier table provided with a transparent member 24 carrying the microfiche is placed. Both carrier tables are driven by a drive 30a and a motor 30b, and their position are detected by sensors 27 and 28. A sensor 37 detects the presence or absence of an image on a frame at the currently projecting position, and transmitted to a CPU in a keyboard 31. When the CPU detects the blank frame, it cancels that the frame is stopped at the projecting position during the prescribed period, controls the motor 30b so as to move the next frame, and shifts the carrier tables 22 and 23.

Description

[Detailed description of the invention] “The present invention relates to a microfiche retrieval device.

[Technical background and purpose of the invention]

When performing a search using a roll film, the search is normally performed using blip marks attached to the sides of each frame of the roll film. Therefore, when performing a browsing search (a function that searches while projecting one frame at a time by pausing at the projection position for a set time), you can use blip marks to search for frames. Even if there is a blank frame (hereinafter referred to as a blank frame), since no mark is attached to this blank frame, this blank frame will not stop at the projection position, so the operator will not see the blank frame and will save time. However, when using fish film for browsing search, fish film usually does not have frame identification marks such as blip marks, so if there is a blank frame in fish film, the image If a browsing search is performed to treat the blank frame in the same way as a recorded frame, the blank frame will stop at the projection position for the set time, and this blank frame will be projected on the screen. You have to wait until it is sent to you, which is a huge waste of time. Also, when the blank frame stops at the projection position for the set time, this part will be blank and transparent, so
The entire screen becomes almost at its maximum brightness, which is bad for the operator's eyes and causes eye fatigue.

The present invention eliminates such drawbacks, and by skipping blank frames in a fish film browsing search, it is possible to eliminate wasted search time and eliminate any negative impact on the eyes of the operator. The purpose of the present invention is to provide a microfiche retrieval device that can perform the following tasks.

The present invention provides a carrier capable of supporting microfiche and moving in two dimensions, a driving means for moving the carrier, and a driving means for moving the microfiche after stopping each frame at a projection position for a set time. and a detection means for detecting whether an image is recorded on the frame, and when the detection means detects that a blank frame without an image is placed at the projection position, the blank frame is The driving means is controlled so as not to stop at the projection position for a set time.

〔Example〕

FIG. 1 is a top view of a microfiche retrieval device according to an embodiment of the present invention. An X-direction carrier table 22 that is slidable in the X-direction is mounted on the carrier base 21, and a Y-direction carrier table 23 that is slidable in the Y-direction is mounted on the X-direction carrier table 22. . Further, a transparent member 24 that supports microfiche is placed on the Y-direction carrier table 23, and when the Y-direction carrier table moves in the -Y direction, the transparent member 24 rotates from a certain point around the rear end. Then, the front end moves upward and begins to open, and when it comes all the way to the front, it is completely open. (This open position is assumed to be the eject position.) At this time, the operator can replace, take out, insert, etc. the microfiche film.

An X-direction reference position detection member 25 is coupled to the X-direction carrier table 22, and the X-direction reference position detection member 25 is arranged so as to be detected by an X-direction sensor 27. In addition, the Y direction carrier table 23 is also
A direction reference position detection member 26 is coupled thereto, and is arranged to be detected by the Y direction sensor 28.

Also, through the cable 32, the driver 30a and the X direction sensor 27. Each signal system of the Y direction sensor 28 is connected to the CPU board 31a in the keyboard 31 (second
), and D from the power supply section 33 through the cable 35.
The output voltage from the power supply section 33 is supplied to the driver 30a, the X direction sensor 27, the Y direction sensor 28, etc. in the C output voltage carrier, and is further supplied to the CPU board 31a in the keyboard 31 through the cable 32. Power supply part 3
3 is provided with a power switch 34, which supplies voltage to each part at 0N10FFI.

Dry z<30a and x, Y direction motor (pulse motor)
30b is connected and controlled by pulses and direction switching signals sent from the CPU board 31a.

Further, the CPU board 31a in the keyboard 31 and the sensor part 37 are connected through a cable 36, and the sensor part 37 detects the presence or absence of an image in the frame of the microfiche and inputs the signal to the CPU board 31a. . As shown in FIG. 3, the sensor part 37 has a sensor 37a that receives light transmitted through the microfiche (FIG. 3).

In FIG. 3, reference numeral 1 denotes a microfish on a Y-direction carrier table 23, and the microfish I is illuminated by an illumination device consisting of an illumination lamp 21, a spherical reflector 3, and a condenser lens 4. Microfiche 1 of 1
The entire frame image is projected onto a screen 8 by a projection lens 5 via a fixed mirror (reflection member) 6 and a half mirror (semi-transparent reflection member) 7 placed at a fixed position. The sensor 37A is placed behind the half mirror 7, and is placed at a position equal to the optical path length from the film to the screen 8. The sensor 37A includes one or more photoelectric conversion elements such as CdS. sensor 3
A part of the projection light is projected onto 7A.

FIG. 4 shows a block diagram of a sensor part 37 that processes the output signal of this sensor 37A to determine the presence or absence of an image.
After the output signal of the sensor 37A is amplified by the amplifier 16, it is compared with the comparison voltage Vr by the comparator 17, and by comparing the magnitude of the blue voltage, it is possible to know the presence or absence of an image, and the output of the comparator 17 is sent to the CPU. It is input to the board 31a. The comparison voltage Vr is a constant voltage value predetermined based on the output voltage of the amplifier 16 with and without an image.

In the above configuration, first, when the power is turned on, the X-direction carrier table 22 and the Y-direction carrier table 23 are
Move to the reference position. The direction of movement is determined by whether or not the X-direction reference position detection member 25 and the Y-direction reference position detection member 26 are detected by the X-direction sensor 27 and the Y-direction sensor 28, respectively. If it was there at the time of insertion, the X and Y direction sensors 27.28 would be the x and Y direction reference position detection members 25.26.
Since the carrier tables 22 and 23 are not detected in the -X and -Y directions, each direction sensor 27 and
When detecting each of the detection members 25 and 26, the carrier tables 22 and 23 stop moving. When the carrier is moved to the reference position in this manner, input from the keyboard 31 is accepted. First, operate the eject key to move the carrier to the eject position, and insert the fish film at the eject position.Next, press the index key or address designation key, etc., the carrier moves, and the index frame or The desired frame specified by the address is searched for, and this frame is placed at the projection position and stopped.

Next, press and hold the +1 or -l key for more than 2 seconds to enter the browsing search mode. +1 key is +X direction or +
When moving the carrier in the Y direction and performing a browsing search, the -1 key is pressed continuously for 2 seconds or more when moving the carrier in the -X or -Y direction and performing a browsing search. When set to browsing search mode,
When the carrier moves in a predetermined direction and feeds the microfiche one frame, the carrier stops and the index frame or the frame next to the desired frame that was searched is stopped at the projection position for a set time, and after the set time, the carrier is moved again to the predetermined position. Move the microfiche in the direction of , feed the microfiche one frame, stop the next frame at the projection position for a set time, and then repeat the above operation automatically 0 For example, move the carrier in the row direction (left/right direction) and browse When performing a search, assuming that images are recorded in all frames in each row, the carrier moves from the leftmost frame to the rightmost frame of the microfiche so that the frames in each row are placed at the projection position for a set time. do. If a no-image signal is sent from the sensor part 37 on the way, the carrier is moved so that the blank frame is not stopped at the projection position H, but the next frame after this blank frame is placed at the projection position. That is, when the sensor 37A detects a blank frame, the carrier is moved and the next frame is placed at the projection position without stopping this blank frame at the projection position for a set time.

FIG. 5 is a flowchart showing the flowchart, in which it is checked in step ■ whether the browsing search is canceled, and if the browsing search is canceled, exit from the browsing search mode, otherwise proceed to step ■. In step ■, when the carrier stops and the image presence/absence detection signal from the sensor part 37 is in the no-image state (sensor 37A detects a blank frame), the process goes to step ■; 37A detects an image frame), the process proceeds to step (2). In step (2), the timer is set to 3 seconds and the carrier is stopped for 3 seconds (F). After the timer ends, the process advances to step 2. In step 2, a pulse corresponding to one frame movement is sent to the driver 30a, and the feeding direction is determined depending on whether the +1 key or -1 key is operated, and the carrier is moved 1 in a predetermined direction. Advance frame by frame, place the next frame at the projection position, and return to step ■ after step ■. Thereafter, repeat steps ■~■ until you cancel the browsing search.

Therefore, when the sensor 37 detects a blank frame, each blank frame in this row or column does not stop at the projection position for the set time, so no time is wasted.
Even if there are many blank frames in the fish film, the browsing and search time can be significantly reduced.

Note that the sensor 37A detects the light from each frame when it is placed at a predetermined projection position, but the sensor 37A detects the light from the frame when the microfiche is moving or stopped. Furthermore, when the sensor 37 detects a blank frame, the carrier may be stopped for a short time and then resume movement.

In the above embodiment, the browsing search mode is entered when the +1 or -1 key is pressed continuously for 2 seconds, but a dedicated key for commanding the browsing search mode may be provided. The time can be arbitrarily varied.

Further, in the above embodiments, the comparison voltage Vr of the comparator is given a constant value, but depending on conditions such as lens magnification, the comparison voltage Vr
By controlling this, it is possible to accurately detect the presence or absence of an image even by changing lenses.

Note that the position of the sensor 37 is not limited to that in the embodiment, and can be placed at any position where the presence or absence of an image can be detected.

〔effect〕

As explained above, in the browsing search mode of a fish film, when a blank frame with no image is detected, this blank frame is not stopped at the projection position for a set period of time, and the first frame is placed at the projection position. By moving the carrier in this way, it is possible to eliminate wasted search time, and also to eliminate the effect of frames with no images causing the screen to become bright for a set time, tiring the operator's eyes.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a microfiche retrieval device to which the present invention is applied, FIG. 2 is a block diagram of a circuit of the retrieval device, and FIG. 3 is a diagram showing the position of a sensor for detecting the presence or absence of an image.
Figure 4 is a block diagram of a part of the sensor that detects the presence or absence of an image.
FIG. 5 is a flowchart. 22---X direction carrier table 23---Y direction carrier table 31-m-Keyboard 31 a---CPU board 31b---Key human power section 37A---Sensor

Claims (1)

[Claims] A carrier capable of supporting microfiche and moving in two dimensions, a driving means for moving the carrier, and controlling the driving means so that the microfiche is moved after each frame is stopped at a projection position for a set time. control means;
It has a detection means for detecting whether an image is recorded on the frame, and when the detection means detects that a blank frame without an image is placed at the projection position, the blank frame is set at the projection position for a period of time. A microfiche retrieval device characterized in that the driving means is controlled so as not to stop.