JPH02199650A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To securely protect a magnetic tape in a VTR by deciding the kind of abnormality with an abnormal data deciding means and inhibiting the operation of the device when the abnormality is fatal to the device. CONSTITUTION:It is decided by an abnormality detecting means 12 in detecting with a supply reel rotation detecting part 10 that a supply reel motor is stopped, and an emergency stop of the VTR operation is requested to a VTR operation deciding part 11 while an abnormal data is written in an unvolatile memory 2 by a write means 14. Then, the VTR operation deciding part 11 is stopped in its operation by take-up and supply reel motor driving parts 6 and 9. It is known by a power source reset detecting part 3 that a power source is reset at the time of resetting the power source, and the abnormal data is read out of the unvolatile memory 2 by a read means 15, and then whether the abnormality generated in the VTR is fatal or not is decided by the operation deciding part 11 for deciding, for instance, a level of abnormal data, and consequently its operation is decided. By this method, the magnetic tape is securely protected in the VTR.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention determines the abnormality when an abnormality occurs in a device, and detects a situation where fatal damage will occur if the operation of the device is not prohibited even after the power is reset. This is a magnetic recording/reproducing device whose operation can be prohibited.

2. Description of the Related Art In recent years, handling of magnetic tapes as software has become important, and how to protect magnetic tapes when a VTR malfunctions has become important.

An example of the above-mentioned conventional magnetic recording/reproducing device will be described below with reference to the drawings.

FIG. 2 shows a tape running system of a conventional magnetic recording/reproducing apparatus, and FIG. 3 shows a drive system and a control system for realizing tape running.

In FIGS. 2 and 3, 21 is a rotary recording/reproducing head.

27 is a magnetic tape, 28 is a cassette case for storing the magnetic tape 27 when not in use, 26 is a post for guiding the magnetic tape 27 to a rotating recording/reproducing head, and 22 is a post for guiding the magnetic tape 27 to a fixed position. 23 is a pinch roller that presses the magnetic tape 27 onto the capstan motor; 24 is a take-up reel motor that winds up the magnetic tape 27;
26 is a supply reel motor that feeds out the magnetic tape 27. 29 is a VTR operation determining unit that determines the VTR operation, 3o is a take-up reel motor drive unit that drives the take-up reel motor, 31 is a supply reel motor drive unit that drives the supply reel motor, and 32 is a A take-up reel rotation detection section detects the rotation of the take-up reel motor, 33 is a supply reel rotation detection section that detects the rotation of the supply reel motor, and 34 detects the supply of power to the device and controls the operation of the device. It is a power supply reset section for initialization, and 36 is an abnormality detection means for detecting abnormality in the apparatus.

The operation of the conventional magnetic recording/reproducing apparatus configured as described above will be described below.

First, during normal recording and playback, the magnetic tape 27 is moved from the cassette case 28 to the two posts 26 as shown in FIG.
It runs in a manner that is drawn out by the vehicle. If the rotation of the supply reel stops for some reason at this time, the abnormality detection means 36 determines that the supply reel motor has stopped due to the supply reel rotation detection unit 33, stops the VTR operation as an emergency, and prohibits further operation. By doing so, the magnetic tape 27 is protected.

Problems to be Solved by the Invention However, in the above configuration, when the power of the device is turned off, the VTR operation determining section 29 initializes the operation.
Trying to put the magnetic tape 27 back into the cassette case 28,
The two posts 26 are moved into the cassette case 28 while winding the magnetic tape 27 with the supply reel 26, but as described above, the supply reel motor cannot rotate, so the magnetic tape 27 cannot return into the cassette case 28. ,
Next, the post 26 will move somewhat until the stop of the supply reel is detected, and this movement will probably cause the magnetic tape 7 to slacken. If this process is repeated, the protection of the magnetic tape 27 is no longer guaranteed.

In view of the above-mentioned problems, the present invention provides a magnetic recording and reproducing device that can store fatal abnormalities in the device even when power is not supplied, and prohibit operation of the device even when power is supplied again. It is something to do.

Means for Solving the Problems In order to solve the above problems, the magnetic recording and reproducing apparatus of the present invention includes an abnormality detection means for detecting an abnormality in the apparatus, and an abnormal data identification means for identifying the type of the abnormality as abnormal value data. a non-volatile memory that retains data even when power is not supplied; a writing unit that writes the abnormal data to the non-volatile memory; an input unit that resets the abnormal data after the abnormality has been repaired; a reset means for resetting, a power return detection means for detecting the start of operation of the device, and a reading means for reading out the abnormal data from the non-volatile memory when the operation starts, and the abnormal data identifying means identifies the type of abnormality. If the abnormality is fatal to the device, operation of the device is prohibited.

Effect of the Invention With the above-described configuration, the present invention is able to memorize fatal abnormalities in the device even when power is not supplied, and to prohibit operation of the device even when power is supplied again. This means that it can be protected.

Embodiments Hereinafter, magnetic recording and reproducing apparatuses according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention, and in FIG. 1, 1 is a reset SW input section;
2 is a nonvolatile memory that stores abnormal data;
is a power reset detection section, 4 is a control section, 5 is a take-up reel motor, 6 is a take-up reel motor drive section, 7 is a take-up reel motor rotation detection section, and 8 is a supply 9 is a supply reel motor driving section, 10 is a supply reel motor rotation detection section, 11 is a VTR operation determining section, 12 is an abnormality detection means, and 13 is a nonvolatile memory initializing section. 14 is a writing means for writing abnormal data and initialization data into the nonvolatile memory 2; and 16 is a reading means for reading abnormal data from the nonvolatile memory 2.

The operation of the magnetic recording/reproducing apparatus configured as described above will be described below with reference to FIG.

First, during normal recording and reproduction, the magnetic tape 7 runs while being drawn out from the cassette case 28 by two posts 26, as shown in FIG. If the rotation of the supply reel is stopped in some way at this time, the abnormality detection means 12 determines that the supply reel motor has stopped by the supply reel rotation detection section 1o, and the VTRTR operation determination section 10 immediately stops the 1TR operation. At the same time, the abnormal data is written into the nonvolatile memory 2 by the writing means 14.

Further, the operation is stopped by the VTRTR operation determining section 6.9 and the supply reel motor driving section 6.9. When the power is restored, the power reset detecting section 3 detects that the power has been restored, the reading means 15 reads the abnormal data from the non-volatile memory 2, and the operation determining section 11 determines whether the abnormal data is high or low, determining whether the abnormality occurring in the VTR is fatal. determine whether something is a thing and determine its behavior. Also, reset SW
In response to an input from the input section 1, an initial value is written from the memory initialization means 13 through the writing means 14.

As described above, according to the present embodiment, there is provided an abnormality detection means for detecting an abnormality in the device, an abnormal data identification means for identifying the type of abnormality as data called an abnormal value, and a non-volatile memory that retains data even when power is not supplied. a memory, a writing means for writing the abnormal data into the nonvolatile memory, and a SW for resetting the abnormal data after the abnormality is repaired.
By providing an input section, a reset means for resetting the abnormal data, a power return detection means for detecting the start of operation of the apparatus, and a reading means for reading the abnormal data from the nonvolatile memory at the start of the operation, the apparatus can be improved. This makes it possible to memorize fatal abnormalities even when power is not supplied, and prohibit the operation of the device even when power is supplied again, making it possible to reliably protect the magnetic tape in a VTR.

Effects of the Invention As described above, according to the present invention, there is provided an abnormality detection means for detecting an abnormality in a device, an abnormality data identification means for identifying the type of abnormality as data called an abnormal value, and a data retention unit that retains data even when power is not supplied. a non-volatile memory for storing the abnormal data, a writing means for writing the abnormal data into the non-volatile memory, a SW input section for resetting the abnormal data after the abnormality has been repaired, and a means for resetting or setting the abnormal data.

By providing a power return detection means for detecting the start of operation of the apparatus and a reading means for reading out the abnormality data from the nonvolatile memory at the time of the start of operation, a fatal abnormality of the apparatus can be stored even when power is not supplied. This makes it possible to prohibit the operation of the device even when power is supplied again.
It is possible to obtain excellent effects such as being able to reliably protect the magnetic tape in a VTR.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional example, and FIG. 3 is a plan view of a running system of a general magnetic recording/reproducing apparatus. 1... Reset SW input section, 2... Non-volatile memory, 3... Power supply reset section, 4...
. . . Control unit, 11 . . . VTR operation determination unit, 1
2... Abnormality detection means. 13...Memory initialization means, 14...Writing means, 16...Reading means. Name of agent: Patent attorney Shigetaka Awano and 1 other person23
−・= 25−・・ 26−・− 27・・− Ah, Bustamp pin ÷ Roller take-up reel Honglu reel? 1 dust? aki tape sword citocase

Claims (1)

[Claims] an abnormality detection means for detecting an abnormality in the device; an abnormality data identification means for identifying the type of the abnormality as abnormal value data;
a non-volatile memory that retains data even when power is not supplied; a writing unit that writes the abnormal data to the non-volatile memory; an input unit that resets the abnormal data after the abnormality has been repaired; and an input section that resets the abnormal data. The apparatus includes a reset means, a power return detection means for detecting the start of operation of the apparatus, and a reading means for reading out the abnormal data from the nonvolatile memory when the operation starts, and the abnormal data identification means determines the type of abnormality. . A magnetic recording/reproducing device, characterized in that, if the abnormality is fatal to the device, operation of the device is prohibited.