JP2782393B2 - VCR tape counting method for fuel assembly inspection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are frequently used in the fuel test reactor ruby Deo cassette tape recorder (hereinafter referred to as VCR), especially R VHS, known for S-VHS type
Regarding VCR , specifically, a VC that can simultaneously record track frames for counting on a video tape during recording
R relates to a tape counting method.

[0002]

2. Description of the Related Art In recent VCRs (VTRs), in order to improve the editing function, a track frame for counting is provided on a video tape so that the feed amount and return amount of the tape can be accurately counted. In this method, at the time of recording, as shown in FIG. 3, a recording signal is recorded at about 4/5 width above the tape width of the video tape, and at the 1/5 width below the tape width, track frames for tape counting (index lines). At the same time.

That is, when an image is arbitrarily called up on the monitor screen, the image is quickly and accurately recorded by fast-forwarding or rewinding while digitally counting the number of track frames by a digital meter provided in the VCR. To enable high-precision tape editing. To explain this in more detail, when the VCR is in the playback (PLAY) or recording (REC) state, the video tape (2) is in the full load state as shown in FIG. That is, when the pinch roller (1) of the VCR comes into contact with the capstan shaft (3), the video tape (2) is pinched and the tape feeding is accurately performed.
/ C head (4) detects the number of track frames (5) (hereinafter referred to as a CTL signal) shown in FIG.
The capstan shaft (3) is rotated in synchronization with the signal, and the tape feed amount is counted based on the number of rotations of the shaft (3).

Also, fast forward (FF) or rewind (RE)
In the state W), as shown in FIG. 2, the video tape (2) is set in a half-load state separated from the head (7) and the pinch roller (1), and the tape is fed by the rotation of the reel motor (6). In this case, the method of counting the tape feed amount is also performed by the method described above.

[0005]

However, in the above-mentioned conventional VCR, the CTL signal is recorded at the time of recording. Therefore, if the tape is a completely unrecorded tape or a tape having an unrecorded portion, the CTL signal is not recorded. Since the capstan shaft does not rotate due to the absence, the tape feed amount cannot be counted, and the unrecorded portion cannot be used for editing based on the tape count. In particular, in the above-described inspection of the fuel assemblies of the nuclear reactor, it is not permissible that the images of the fuel assemblies that are sequentially recorded one by one overlap with each other to cause a partial omission in the fuel inspection. Unrecorded space is often provided. In such a case,
If the tape is sent after the inspection-recorded tape is sent, the unrecorded portion cannot be digitally counted, so that a difference occurs between the tape count number and the actual tape feed amount, resulting in a disadvantage that the editing function is reduced. In addition, the conventional VCR has a drawback that the tape is fed by the reel motor at the time of fast-forward and rewind, as described above, so that the accuracy of the tape feed is lacking.

[0006] The present invention addresses the above situation and provides a fuel collection.
It is an object of the present invention to accurately count a tape of a combined inspection- recorded tape and accurately count the tape even in a fast-forward / rewind state.

[0007]

That is, a feature of the tape count method of the fuel assembly inspection VCR of the present invention that achieves the above object is that a CTL signal is recorded on a video tape simultaneously with recording of the fuel assembly. In a tape counting method for a fuel assembly inspection VCR, a CTL signal is detected by a dedicated head, and a capstan shaft rotates in synchronization with the detection signal, and a tape feed amount is counted by the number of rotations of the shaft. Recording of fuel assemblies recorded one by one in order
An inspection record with an unrecorded part between the part and the next recorded part
Using a pre-painted tape, the VCR fast-forwarding and rewinding the tape in the same full-load state as during playback / recording, and incorporating a pulse transmitter that emits a signal synchronized with the CTL signal in the dedicated head, In an unrecorded portion of the video tape, the capstan shaft is synchronously rotated by a signal from the pulse transmitter, and the tape feed amount is counted based on the number of rotations of the shaft. Here, the CTL signal is an abbreviation of the control signal, and is the track frame as described above.

[0008]

By performing the above-described tape counting method for a fuel assembly inspection VCR of the present invention, the video tape is controlled and rotated by the rotation of the capstan shaft even in the fast-forward and rewind states.
Precisely with the tape feed compared with the case of sending only a conventional reel motor, it either et capstan shaft rotates by a signal from the pulse generator in the unrecorded part of the video tape, test recording with a unrecorded portion It is possible to accurately count the tape feed amount even with the used tape.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG .
An embodiment of a tape counting method for an assembly inspection VCR will be described.

FIG. 1 shows the VCR tape counting method of the present invention.
More an explanatory view showing a state in which loading video tape, (1) the pinch rollers in FIG., (2) a video tape, (3) the capstan shaft, (4) A as CTL signal detection only head / C head,
(6) is a reel motor, (7) is a recording / playback drum head, (8) is an idler pin, (9) is an impedance roller, (10) is an erase head, and (11) is a guide pin. .

As shown in FIG. 3, the VCR simultaneously records a recording portion (12) and a CTL signal (5) on a video tape (2) at the time of recording, and converts the CTL signal (5) to the A signal.
/ C head (4), the capstan shaft (3) rotates in synchronization with the detection signal, and the tape feed amount is counted by the number of rotations of the shaft (3). A fast-forward switch is used to output a fast-forward playback signal, and a rewind switch (not shown) is used to output a rewind playback signal. Fast-forward and rewind of the tape (2) are performed during playback / recording as shown in FIG. It is to be performed in the same full load state as.

Further, the A / C head (4) of the VCR incorporates a pulse transmitter (not shown) for generating a signal completely synchronized with the CTL signal, and a non-recorded portion of the video tape (2). In this configuration, the capstan shaft (3) is synchronously rotated by a signal from the pulse transmitter, and the tape feed amount can be counted based on the number of rotations of the shaft (3). Although the above pulse transmitter always emits a signal, the capstan shaft (3)
Is A / A if the video tape (2) has been recorded.
The CTL signal of the tape (2) detected by the C head (4) is rotated by giving priority to the CTL signal.
When there is no TL signal, rotation is performed by a signal from the pulse transmitter.

The VCR according to the embodiment of the present invention having the above-described configuration.
When the feed amount of the video tape is counted by using the video tape (2), the video tape (2) is controlled and fed by the rotation of the capstan shaft (3) even in the fast-forward and rewind states. ) correctly with the tape feed compared with the case of sending only a video tape (2) of the unrecorded capstan shaft by a signal from the pulse oscillator also in part (3) is found or rotating, the unrecorded portion Fuel collection
It is possible to accurately count the amount of tape feeding even with a combined inspection- recorded tape.

[0014]

As described above, the fuel assembly of the present invention is
The VCR tape count method for inspection is recorded one by one in order.
Between the recorded part of the fuel assembly and the next recorded part
Using an inspection-recorded tape provided with a recording part, the video tape at the time of fast-forward and rewind is performed in the same full-load state as at the time of playback / recording, and a dedicated head for detecting the CTL signal of the tape is synchronized with the CTL signal. A pulse transmitter that emits a signal to perform the operation is incorporated, and in the unrecorded portion of the video tape, the capstan shaft is synchronously rotated by a signal from the pulse transmitter, and the tape feed amount is counted by the number of rotations of the shaft, and the fast feed is performed. Also, in the rewinding state, the video tape is fed by being controlled by the rotation of the capstan shaft, so that the tape is fed more accurately than in the case of feeding only by the conventional reel motor, and even in the unrecorded portion of the video tape. it either et capstan shaft rotates by a signal from the pulse generator, It can be counted accurately tape feed amount in a recorded tape having a recording portion, thereby also correct the unrecorded portion tapes that require nuclear fuel inspection during the recording portion and the next recording portion of the tape This has a remarkable effect of enabling editing and / or accurate cueing of any fuel at the time of regeneration inspection.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state where a video tape is loaded by a VCR tape counting method of the present invention.

FIG. 2 is an explanatory diagram showing a conventional VCR when fast-forwarding and rewinding.

FIG. 3 is a partially enlarged view showing a recorded tape.

[Explanation of symbols]

 (1) Pinch roller (2) Video tape (3) Capstan shaft (4) A / C head (dedicated head) (5) CTL signal (track frame) (6) Reel motor (7) Drum head (8) Idler Pin (9) Impedance roller (10) Erase head (11) Guide pin (12) Recording part

Claims (1)

(57) [Claims] 1. A CTL signal is recorded on a videotape simultaneously with recording of a fuel assembly, the CTL signal is detected by a dedicated head, and a capstan shaft is rotated in synchronization with the detection signal. In the tape counting method of the fuel assembly inspection video cassette tape recorder that counts the tape feed amount by the number of revolutions, an unrecorded portion is inserted between a recorded portion of the fuel assembly recorded one by one and a next recorded portion. A pulse transmitter that uses the test-recorded tape provided to perform the tape feed at the time of fast-forward and rewind of the recorder in the same full load state as at the time of reproduction / recording, and that issues a signal synchronized with the CTL signal to the dedicated head. And the capstan shaft is synchronously rotated by a signal from the pulse generator in an unrecorded portion of the video tape. So, the fuel assembly inspection Yobi Deo cassette tape recorder tape counting method characterized by counting the tape feeding amount by the rotation speed of the shaft.