JPH0721901B2 - Magnetic recording medium identification device - Google Patents

Magnetic recording medium identification device

Info

Publication number
JPH0721901B2
JPH0721901B2 JP61112003A JP11200386A JPH0721901B2 JP H0721901 B2 JPH0721901 B2 JP H0721901B2 JP 61112003 A JP61112003 A JP 61112003A JP 11200386 A JP11200386 A JP 11200386A JP H0721901 B2 JPH0721901 B2 JP H0721901B2
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
photodetector
light
tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP61112003A
Other languages
Japanese (ja)
Other versions
JPS62266753A (en
Inventor
比呂志 山木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP61112003A priority Critical patent/JPH0721901B2/en
Publication of JPS62266753A publication Critical patent/JPS62266753A/en
Publication of JPH0721901B2 publication Critical patent/JPH0721901B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、磁気記録再生装置に装着される記録媒体の
種類を識別するための装置に関するものである。
The present invention relates to an apparatus for identifying the type of recording medium mounted in a magnetic recording / reproducing apparatus.

〔従来の技術〕[Conventional technology]

第5図は特開昭48−14309号公報や実開昭48−53322号公
報などに示された従来の磁気テープの識別装置を示すブ
ロツク回路図である。図において、(1)は特定の周波
数とレベルに設定された基準信号を出力する基準信号発
生器、(2)は基準信号を増幅する記録アンプ、(3)
は記録用ヘツド、(4)は磁気記録媒体の1例である磁
気テープ、(5)は再生用ヘツド、(6)は再生信号を
増幅するヘツドアンプ、(7)は再生信号のレベルか
ら、磁気テープの種類を弁別する弁別器である。
FIG. 5 is a block circuit diagram showing a conventional magnetic tape discriminating apparatus disclosed in JP-A-48-14309 and JP-A-48-53322. In the figure, (1) is a reference signal generator that outputs a reference signal set to a specific frequency and level, (2) is a recording amplifier that amplifies the reference signal, (3)
Is a recording head, (4) is a magnetic tape which is an example of a magnetic recording medium, (5) is a reproducing head, (6) is a head amplifier for amplifying a reproduction signal, and (7) is a magnetic field from the level of the reproduction signal. This is a discriminator that discriminates the type of tape.

次の動作について説明する。基準信号発生器(1)から
発生された特定の周波数の信号あるいは特定の周波数の
信号にバイアス信号を重畳させた信号が、記録アンプ
(2)によつて、一定レベルの記録電流に変換され、記
録ヘツド(3)により、磁気テープ(4)に記録され
る。この記録信号は、再生ヘツド(5)で再生され、こ
の再生信号は再生アンプ(6)によつて増幅され、弁別
器(7)によつて、再生信号のレベルから、磁気テープ
(3)の種類が識別される。
The following operation will be described. A signal having a specific frequency generated from the reference signal generator (1) or a signal obtained by superimposing a bias signal on a signal having a specific frequency is converted by the recording amplifier (2) into a recording current of a constant level, It is recorded on the magnetic tape (4) by the recording head (3). This recorded signal is reproduced by the reproducing head (5), this reproduced signal is amplified by the reproducing amplifier (6), and is discriminated by the discriminator (7) from the level of the reproduced signal of the magnetic tape (3). The type is identified.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

従来の磁気記録媒体識別装置は以上のように構成されて
いるので、磁気記録媒体の種類を識別するためには、磁
気記録装置を作動させて、磁気テープ(4)を走行させ
る必要があるので、取扱いが煩雑であるという問題点が
あつた。
Since the conventional magnetic recording medium identification device is configured as described above, it is necessary to operate the magnetic recording device and run the magnetic tape (4) in order to identify the type of the magnetic recording medium. However, there was a problem that the handling was complicated.

この発明は、上記のような問題点を解消するためになれ
たもので磁気記録媒体が停止、走行のいずれの場合であ
つても識別できる磁気記録媒体識別装置を得ることを目
的とする。
The present invention has been made to solve the above problems, and an object of the present invention is to provide a magnetic recording medium identification device that can identify a magnetic recording medium even when the magnetic recording medium is stopped or running.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る磁気記録媒体識別装置は、磁気記録媒体
を挾む位置に配設されている光源と、光検知器と、この
光検知器の検出レベルから当該磁気記録媒体の種類を弁
別する手段とを備えたものである。
A magnetic recording medium identification device according to the present invention includes a light source disposed at a position sandwiching a magnetic recording medium, a photodetector, and means for discriminating the type of the magnetic recording medium from the detection level of the photodetector. It is equipped with and.

〔作用〕[Action]

この発明における光検出器は、光源から出て、磁気記録
媒体を透過して入射した光量に比例した電流を出力す
る。弁別手段は、この電圧値を基準値と比較し、その結
果に応じた信号を出力して磁気記録媒体の種類を表示す
る。
The photodetector according to the present invention outputs a current proportional to the amount of light emitted from the light source and transmitted through the magnetic recording medium. The discrimination means compares this voltage value with a reference value and outputs a signal according to the result to display the type of the magnetic recording medium.

〔発明の実施例〕Example of Invention

以下、この発明の一実施例を図について説明する。第1
図において(8)は電源、(9)は電源(8)から供給
される電力により、一定の光度で発光する光源、(10)
は入射光量に応じた電圧を出力する光検知器、(11)は
光検知器(10)の出力電圧値から、該当する磁気記録媒
体の種類を弁別し、その弁別信号を出力する弁別器であ
る。
An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, (8) is a power source, (9) is a light source which emits light with a constant luminous intensity by electric power supplied from the power source (8), (10)
Is a photodetector that outputs a voltage according to the amount of incident light, and (11) is a discriminator that discriminates the type of magnetic recording medium from the output voltage value of the photodetector (10) and outputs the discrimination signal. is there.

次に動作について説明する。光源(9)は電源(8)か
ら供給される電力で一定の光度で発光し、磁気テープ
(4)を照射する。第2図は磁気テープの種類別の光検
出器(10)の出力電圧を示す図で、磁気テープ(4)が
金属塗布形であれば光はほとんど透過せず、したがつ
て、光検知器(10)の出力電圧は非常に低い値となる。
他方、磁気テープ(4)が金属蒸着形であれば、光をあ
る程度透過させるので、光検知器(10)の、出力電圧は
前者の場合に比べて高くなる。弁別器(11)は、光検知
器(10)の出力電圧を、基準電圧と比較し、低いときに
は金属塗布形媒体、高いときには金属蒸着媒体と判定
し、その判定結果を示す信号を端子(12)から出力す
る。この弁別信号は、たとえば発光ダイオードによる表
示装置や、記録特性、再生のイコライザの特性を変化さ
せる装置へと接続される。
Next, the operation will be described. The light source (9) emits light with a constant luminous intensity by the power supplied from the power source (8) and irradiates the magnetic tape (4). FIG. 2 is a diagram showing the output voltage of the photodetector (10) for each type of magnetic tape. When the magnetic tape (4) is a metal-coated type, almost no light is transmitted, and accordingly, the photodetector is used. The output voltage of (10) is extremely low.
On the other hand, if the magnetic tape (4) is a metal vapor deposition type, it transmits light to some extent, so the output voltage of the photodetector (10) becomes higher than in the former case. A discriminator (11) compares the output voltage of the photodetector (10) with a reference voltage, determines that the medium is a metal-coated medium when the voltage is low, and a metal deposition medium when the voltage is high, and outputs a signal indicating the determination result to a terminal (12). ) To output. This discrimination signal is connected to, for example, a display device using a light emitting diode or a device for changing the recording characteristics and the characteristics of the reproduction equalizer.

第3図にこの実施例の具体的な回路例を示す。図におい
て、(9a)は発光器、(9b)は発光器(9a)の保護抵抗
で、(9a),(9b)で光源(9)を構成する。(10a)
は受光器、(10b)は受光器(10a)の保護抵抗で、(10
a),(10b)で光検出器(10)を構成する。(13)は基
準電位、(14)は受光器(10a)の出力と基準電位(1
3)とを比較する比較器である。
FIG. 3 shows a concrete circuit example of this embodiment. In the figure, (9a) is a light emitting device, (9b) is a protection resistor for the light emitting device (9a), and (9a) and (9b) constitute a light source (9). (10a)
Is the light receiver, (10b) is the protective resistance of the light receiver (10a),
The photodetector (10) is composed of a) and (10b). (13) is the reference potential, (14) is the output of the light receiver (10a) and the reference potential (1
This is a comparator that compares with 3).

つぎに動作を説明する。発光器(9a)から出た光が、磁
気テープ(4)を透過して受光器(10a)に入射し、受
光器(10a)の出力電圧と基準電位(13)とが、比較器
(14)で比較される。基準電位(13)は金属蒸着形であ
る場合と、金属塗布形である場合の受光器(10a)の出
力電圧の中間値に設定されているので、受光器(10a)
の出力電圧が、基準電位より高い場合は金属蒸着形であ
ると判定し、受光器(10a)の出力電圧が基準電位より
低い場合は金属塗布形であるとして出力端子(12)から
弁別信号が例えば「H」,「L」の信号として出力され
る。
Next, the operation will be described. Light emitted from the light emitter (9a) passes through the magnetic tape (4) and enters the light receiver (10a), and the output voltage of the light receiver (10a) and the reference potential (13) are compared with each other by the comparator (14). ) Is compared. Since the reference potential (13) is set to the intermediate value of the output voltage of the light receiver (10a) for the metal vapor deposition type and the metal coating type, the light receiver (10a)
If the output voltage of is higher than the reference potential, it is judged to be the metal deposition type, and if the output voltage of the light receiver (10a) is lower than the reference potential, it is judged to be the metal coating type and the discrimination signal is output from the output terminal (12). For example, it is output as "H" and "L" signals.

なお、磁気テープ装置においては、磁気テープの巻き始
めと、巻き終りとを透明テープを用いて検知する方法が
広く用いられている。これは、透明テープと磁気テープ
の光の透過量の差によつて、巻始め巻終りを識別するも
のであるが、これを利用してテープを識別してもよい。
この場合の光検知器の出力は第2図に示したように金属
塗布形テープの場合は光はほとんど透過せず、透明テー
プの場合には光はほとんど透過し、金属蒸着テープの場
合は、光が少し透過する。これにE1,E2の2つの検知電
位を設定し、3者を識別する。第4図はこの実施例の回
路図である。図において(13a)は、電位E1の第1の基
準電位、(13b)は電位E2の第2の基準電位、(14a),
(14b)はそれぞれ基準電位(13a),(13b)と受光器
(10a)の出力電圧とを比較する第1、第2の比較器で
ある。(15)はAND回路であり、比較器(14a)と(14
b)の出力がいずれも「H」レベルつまり、透明テープ
であるとき「H」レベルを出力端子(12a)に出力す
る。(16)はOR回路であり、比較器(14a)と(14b)の
出力がそれぞれ「L」,「H」レベル、つまり金属蒸着
テープであるとき「H」レベルを出力端子(12b)に出
力する。(17)はNAND回路であり、比較器(14a),(1
4b)の出力がいずれも「L」レベル、つまり金属塗布形
テープのとき「H」レベルを出力端子(12c)に出力す
る。
In the magnetic tape device, a method of detecting the winding start and the winding end of the magnetic tape using a transparent tape is widely used. This is to identify the winding start and winding end based on the difference in the amount of light transmission between the transparent tape and the magnetic tape, but the tape may be identified using this.
As shown in FIG. 2, the output of the photodetector in this case is such that almost no light is transmitted in the case of the metal-coated tape, almost light is transmitted in the case of the transparent tape, and that of the metal-evaporated tape is A little light is transmitted. Two detection potentials of E 1 and E 2 are set to this, and the three are identified. FIG. 4 is a circuit diagram of this embodiment. In the figure, (13a) is the first reference potential of the potential E 1 , (13b) is the second reference potential of the potential E 2 , (14a),
(14b) are first and second comparators for comparing the reference potentials (13a) and (13b) with the output voltage of the photodetector (10a), respectively. (15) is an AND circuit, which includes comparators (14a) and (14a).
When all the outputs of b) are "H" level, that is, when the tape is a transparent tape, "H" level is output to the output terminal (12a). (16) is an OR circuit, which outputs "L" and "H" levels to the output terminal (12b) when the outputs of the comparators (14a) and (14b) are metal-deposited tape. To do. (17) is a NAND circuit, and comparators (14a), (1
All outputs of 4b) are "L" level, that is, "H" level is output to the output terminal (12c) when the tape is a metal-coated tape.

このように、この実施例によれば、光透過度の異なる磁
気テープの種類および、巻初め、巻終りを磁気テープを
走行させることなく弁別することができる。
In this way, according to this embodiment, it is possible to discriminate between the types of magnetic tapes having different light transmittances and the winding start and winding end without running the magnetic tape.

なお、上記実施例は、磁気記録媒体が磁気テープである
場合を説明したが、磁気デイスクなどの磁気記録媒体に
も同様に適用でき、同様の効果が得られることは明らか
である。
In addition, although the above-mentioned embodiment describes the case where the magnetic recording medium is a magnetic tape, it is apparent that the same effect can be obtained by being similarly applied to a magnetic recording medium such as a magnetic disk.

〔発明の効果〕〔The invention's effect〕

以上のようにこの発明によれば、磁気記録媒体の光の透
過量の差を検出し媒体の種類を識別するようにしたの
で、簡単な構成でもつて磁気記録媒体の停止、走行にか
かわらず瞬時識別できる。安価な磁気記録媒体識別装置
が得られる効果がある。
As described above, according to the present invention, the difference in the light transmission amount of the magnetic recording medium is detected and the type of the medium is identified. Can be identified. There is an effect that an inexpensive magnetic recording medium identification device can be obtained.

【図面の簡単な説明】[Brief description of drawings]

第1図は、この発明の一実施例のブロツク回路図、第2
図は磁気テープの種類による光透過量の差を示す図、第
3図はこの発明の一実施例の具体的な構成例を示す回路
図、第4図はこの発明の他の実施例の具体的な構成例を
示す回路図、第5図は、従来の磁気記録媒体識別装置の
ブロツク回路図である。 (4)……磁気テープ(磁気記録媒体)、(9)……光
源、(10)……光検出器、(11)……弁別器(弁別手
段)。 なお各図中同一符号は同一または相当部分を示す。
FIG. 1 is a block circuit diagram of an embodiment of the present invention, and FIG.
FIG. 4 is a diagram showing the difference in the amount of light transmission depending on the type of magnetic tape, FIG. 3 is a circuit diagram showing a concrete configuration example of an embodiment of the present invention, and FIG. 4 is a concrete diagram of another embodiment of the present invention. 5 is a block circuit diagram of a conventional magnetic recording medium identification device. (4) ... magnetic tape (magnetic recording medium), (9) ... light source, (10) ... photodetector, (11) ... discriminator (discriminating means). In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】一定の光度で発光する光源と、この光源か
ら放出され、磁気記録媒体を透過した光を検出する光検
出器と、この光検出器の出力電圧を基準電位と比較し、
その高低に応じて上記磁気記録媒体の種類を示す信号を
出力する弁別手段とを備えた磁気記録媒体の識別装置。
1. A light source that emits light with a constant luminous intensity, a photodetector that detects light emitted from the light source and transmitted through a magnetic recording medium, and an output voltage of the photodetector is compared with a reference potential.
A discriminating device for a magnetic recording medium, comprising: a discriminating means for outputting a signal indicating the type of the magnetic recording medium according to its height.
【請求項2】2段階の基準電位を有しており、光検出器
の出力電圧を比較して磁気テープに巻初め、巻終りの透
明部分の検出と当該磁気テープの種類の弁別とを併せ行
うように構成したことを特徴とする特許請求の範囲第1
項記載の磁気記録媒体の識別装置。
2. The method has a two-step reference potential, compares the output voltage of a photodetector, and detects the transparent portion at the beginning and the end of winding on the magnetic tape, and discriminates the type of the magnetic tape. Claim 1 characterized in that it is configured to perform
An apparatus for identifying a magnetic recording medium according to the item.
JP61112003A 1986-05-14 1986-05-14 Magnetic recording medium identification device Expired - Lifetime JPH0721901B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61112003A JPH0721901B2 (en) 1986-05-14 1986-05-14 Magnetic recording medium identification device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61112003A JPH0721901B2 (en) 1986-05-14 1986-05-14 Magnetic recording medium identification device

Publications (2)

Publication Number Publication Date
JPS62266753A JPS62266753A (en) 1987-11-19
JPH0721901B2 true JPH0721901B2 (en) 1995-03-08

Family

ID=14575522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61112003A Expired - Lifetime JPH0721901B2 (en) 1986-05-14 1986-05-14 Magnetic recording medium identification device

Country Status (1)

Country Link
JP (1) JPH0721901B2 (en)

Also Published As

Publication number Publication date
JPS62266753A (en) 1987-11-19

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