JPH09147536A - Tape transport control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve an accurate tape transport control device by accurately calculating the rolling diameter of each reel. SOLUTION: A rotary angle detector 7 supplies a signal to a counter 10 every time a reel 2 rotates by 1/n turns and a rotary angle speed detector 8 supplies a signal to a counter 11 every time a reel 3 rotates by 1//nd turns. The counter 10 counts the rotary period of the reel 2 and supplies a count value to an operator 12. The counter 11 counts the rotary period of the reel 3, supplies the count value to an operator 13, and nearly synchronizes the rotary period detection of the reels 2 and 3, thus detecting the rotary period of the reels 2 and 3 at nearly identical tape speeds. Also, when the difference between a target tape tension and an actual tape tension is within a specific range, the rotary period of the reels 2 and 3 can be detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape running device, and more particularly to a tape running controller using a reel.

[0002]

2. Description of the Related Art At present, a tape running system using a reel direct drive (hereinafter abbreviated as reel DD) for running a tape by a take-up reel and a delivery reel is
It is used in magnetic recording / reproducing devices that record signals in the longitudinal direction of the tape.

When the tape is run at a predetermined speed by the reel DD system, the actual speed V of the tape is calculated from the rotation cycle T _{T of the} take-up reel and the winding diameter r _T according to the following equation (1), Control is performed so that V becomes constant. V = (2πr _T / T _T )-(1) Further, in the tape running control device, the tape tension control is usually performed in order to apply a predetermined tension to the tape. The tape tension control is performed by using the winding diameter r _{T of the} take-up reel and the winding diameter r _{S of the} delivery reel, and
By -1) and (2-2), a predetermined torque (τ _T (take-up reel torque), τ _S (supply reel torque)) corresponding to each winding diameter is controlled so as to act on the reel shaft (k). _T and k _S are coefficients). _{τ T = k T r T ---} (2-1) τ S = k S r S --- (2-2) As described above, the reel DD scheme, winding reel always change during tape travel It is essential to detect the diameter in real time.

The winding diameter r _T of the take-up reel is calculated by the following equation (3) using the rotation period T _{T of the} take-up reel, the rotation period T _{S of} the delivery reel, and the total winding area S corresponding to the total winding amount of the tape. Is calculated by r _T = √ ((S / π) / (1+ (T _S / T _T ) ² )) --- (3) Similarly, the winding diameter r _{S of the} delivery reel can be calculated by the following equation (4). r _S = √ ((S / π) / (1+ (T _T / T _S ) ² )) --- (4) In the reel diameter detection method described above, the information detected during tape running is the delivery reel. Since it is only the rotation cycle of the take-up reel, it is very suitable for tape running control by the reel DD.

An example of using the above-described winding diameter detecting method is disclosed in Japanese Patent Laid-Open No. 59-58644 and Japanese Patent Laid-Open No.
There is a publication of 205,780.

[0006]

However, the above-mentioned conventional method for detecting the tape winding diameter is premised on that the length of the tape path does not change due to the looseness of the tape between the feeding reel and the take-up reel. I am trying. Therefore, when the length of the tape path changes, the operation of the delivery reel, the take-up reel, and the tape temporarily move independently. Therefore, even if the winding diameter is calculated using the rotation cycles of the feed reel and the take-up reel detected at this time, the winding diameter cannot be calculated accurately.

Further, as described above, in the tape running control device, the tape tension control is performed, but there is a device that uses the tension sensor as shown in FIG. 2 to detect the tension of the tape.

That is, one end of the sensor arm 6 is brought into contact with the tape 1, and the other end is connected to the fixed shaft 30 fixed to the main body of the apparatus via the spring 31. The sensor arm 6 is rotatably supported by a rotary shaft 29 fixed to the apparatus body. As a result, the sensor arm 6 is rotated by the rotation shaft 2 according to the tape tension.
Rotate around 9. The tape tension can be detected by detecting the rotation angle and the like of the sensor arm 6.

Even in an apparatus using such a tape tension sensor, the sensor arm moves and the tape path changes in accordance with the change in the tape tension, which results in a winding diameter calculation error and the winding diameter can be calculated with high accuracy. Can not.

On the other hand, even when the tape path does not change,
If the tape speed when the rotation cycle T _S of the delivery reel is detected and the tape speed when the rotation cycle T _T of the take-up reel is detected are different, the detected winding diameter is different from the actual one.

That is, as shown in FIG. 3, the tape speed V
Rotation cycle T _T (1 / n
The period, (A) of FIG. 3, can be calculated by the following equation (5), where r _T is the actual winding diameter of the take-up reel. T _T = (2πr _T ) / V-(5) On the other hand, the rotation cycle T _S (1 / _nd cycle, FIG. 3B) of the delivery reel detected at the tape speed V + dV is When the actual winding diameter is r _S , the following equation (6)
Can be calculated at. T _Sd = (2πr _S ) / (V + dV) --- (6) When the winding diameter is calculated from the detected rotation cycle of each reel, the following formula (7) is obtained, and the calculated winding diameter is different from the actual winding diameter. Will end up. r _Sd = √ ((S / π) / (1+ (T _T / T _Sd ) ² ) = √ ((r _T ² + r _S ² ) / (1 + ((V + dV) r _T / (Vr _S )) ² ) -(7) As described above, the method of detecting the winding diameter based on the rotation cycle of each reel is affected by the change of the tape path and the change of the tape speed, and therefore the winding of each reel can be performed with high accuracy. The diameter could not be calculated, and highly accurate tape running control could not be performed.

An object of the present invention is to realize a tape running control device capable of accurately calculating the winding diameter of each reel and performing highly accurate tape running control.

[0013]

In order to achieve the above object, the present invention is configured as follows. In the tape running control device, the means for rotating the tape feed reel and the tape take-up reel and the take-up reel are
n (n is a real number) is calculated, and a period in which the delivery reel is rotated by 1 / n _d (n _d is a real number) is calculated substantially in the same period as the detection period of the rotation period of the take-up reel. Means, a means for calculating the total winding amount of the tape wound on the sending reel and the take-up reel, based on the rotation cycle of the sending reel, the rotation cycle of the winding reel and the total winding amount of the tape, Means for calculating the winding radius of the tape on the take-up reel, means for calculating the actual speed of the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel, and the target speed of the tape are stored. Memory means, means for calculating the running speed error of the tape based on the actual speed of the tape and the target speed,
Rotation control means for controlling the rotation of the means for rotationally driving the reel based on the calculated running speed error of the tape.

Further, in the tape running control device, a delivery reel driving means for rotating the tape delivery reel, and a take-up reel for rotationally driving the take-up reel so that the tape is taken up from the tape delivery reel to the tape take-up reel. Reel driving means, means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), and means for calculating a cycle in which the delivery reel rotates by 1 / n _d (n _d is a real number), A means for detecting the total winding amount of the tape wound on the feed reel and the take-up reel,
A means for detecting the actual tension of the tape, a tension memory means for storing the target tension of the tape, a means for calculating the tension error between the actual tension of the tape and the target tension, and a means for calculating the tension error of the delivery reel based on the tension error. Means for correcting the rotation cycle,
Means for calculating the winding radius of the tape on the take-up reel based on the corrected rotation cycle of the delivery reel, the rotation cycle of the take-up reel, and the total winding amount of the tape, and the corrected rotation cycle of the delivery reel and the winding A means for calculating the winding diameter of the delivery reel based on the rotation cycle of the take-up reel and the total winding amount of the tape, and the actual speed of the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel. A means for calculating, a speed memory means for storing the target speed of the tape, a means for calculating the running speed error of the tape based on the actual speed and the target speed of the tape, and a winding means based on the running speed error of the tape. Rotation control means for controlling the rotation of the rotation drive means of the take-up reel, and so that the delivery reel applies a predetermined tension to the tape, based on the winding diameter of the delivery reel, A means for calculating a first input signal to be supplied to the feeding reel driving means, and a means for supplying the feeding reel driving means so that the tension error becomes zero based on the tension error of the tape and the winding diameter of the feeding reel. 2 means for calculating an input signal, and 1st means for feeding reel driving means
Means for adding the input signal to the second input signal, and means for controlling the rotation of the feed reel driving means based on the added data.

Further, in the tape running control device, a delivery reel driving means for rotating the tape delivery reel, and a take-up reel for rotationally driving the take-up reel so that the tape is taken up from the tape delivery reel to the tape take-up reel. Reel driving means, means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), and means for calculating a cycle in which the delivery reel rotates by 1 / n _d (n _d is a real number), A means for detecting the total winding amount of the tape wound on the feed reel and the take-up reel,
A means for detecting the actual tension of the tape, a tension memory means for storing the target tension of the tape, a means for calculating the tension error between the actual tension of the tape and the target tension, and a tension error of the tape within a predetermined range. At a given time, a means for calculating the winding radius of the tape on the take-up reel based on the rotation cycle of the delivery reel, the rotation cycle of the take-up reel, and the total winding amount of the tape, and a tape tension error within a predetermined range. A means for calculating the winding diameter of the delivery reel based on the rotation cycle of the delivery reel, the rotation cycle of the take-up reel, and the total winding amount of the tape at a given time, and the tape winding radius of the take-up reel and the rotation of the take-up reel. A means for calculating the actual speed of the tape based on the cycle, a speed memory means for storing the target speed of the tape, and a running speed of the tape based on the actual speed and the target speed of the tape. A means for calculating the speed error, a rotation control means for controlling the rotation of the rotation driving means of the take-up reel based on the running speed error of the tape, and a rotation control means for the delivery reel so that the delivery reel applies a predetermined tension to the tape. A means for calculating a first input signal to be supplied to the delivery reel drive means based on the winding diameter, and a delivery reel drive for making the tension error zero based on the tape tension error and the delivery reel winding diameter. Means for calculating a second input signal to be supplied to the means, means for adding the first input signal and the second input signal of the feed reel driving means, and means for adding the feed reel driving means based on the added data. And means for controlling rotation.

Further, in the tape running control device, a delivery reel driving means for rotating the tape delivery reel, and a take-up reel for rotationally driving the take-up reel so that the tape is taken up from the tape delivery reel to the tape take-up reel. The reel driving means, the means for calculating the cycle in which the take-up reel rotates by 1 / n (n is a real number), the detection period of the rotation cycle of the take-up reel, and the send-out reel in 1 / n _d (about the same period) n _d is a real number) means for calculating the period of rotation, means for detecting the total winding amount of the tape wound on the feed reel and the take-up reel,
A means for detecting the actual tension of the tape, a tension memory means for storing the target tension of the tape, a means for calculating the tension error between the actual tension of the tape and the target tension, and a means for calculating the tension error of the delivery reel based on the tension error. Means for correcting the rotation cycle,
Means for calculating the winding radius of the tape on the take-up reel based on the corrected rotation cycle of the delivery reel, the rotation cycle of the take-up reel, and the total winding amount of the tape, and the corrected rotation cycle of the delivery reel and the winding A means for calculating the winding diameter of the delivery reel based on the rotation cycle of the take-up reel and the total winding amount of the tape, and the actual speed of the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel. A means for calculating, a speed memory means for storing the target speed of the tape, a means for calculating the running speed error of the tape based on the actual speed and the target speed of the tape, and a winding means based on the running speed error of the tape. Rotation control means for controlling the rotation of the rotation drive means of the take-up reel, and so that the delivery reel applies a predetermined tension to the tape, based on the winding diameter of the delivery reel, A means for calculating a first input signal to be supplied to the feeding reel driving means, and a means for supplying the feeding reel driving means so that the tension error becomes zero based on the tension error of the tape and the winding diameter of the feeding reel. 2 means for calculating an input signal, and 1st means for feeding reel driving means
Means for adding the input signal and the second input signal, and means for controlling the rotation of the feed reel driving means based on the added data.

[0017] Preferably, in the tape running control device, the means for calculating the tape winding radius of the take-up reel is m times the predetermined speed of the tape (m is a real number exceeding 0).
When traveling in, the tape winding radius of the take-up reel is calculated once while the take-up reel rotates m times.

Further, preferably, in the tape running control device, the means for calculating the tape winding radius of the take-up reel is a ratio of once per one rotation of the take-up reel. To calculate.

Further, preferably, in the tape traveling speed control device, the means for calculating the tape winding radius of the take-up reel, when the tape traveling speed is substantially zero,
The calculation of the tape winding radius of the take-up reel is stopped.

Further, preferably, in the tape traveling speed control device, the target tension is the actual tension of the tape detected at the start of calculation of the rotation cycle of the feed reel.

Further, preferably, in the tape running control device, when the target speed is changed while the tape is running, the calculation of the tape winding radius of the feed reel and the take-up reel is stopped, and the tape with the target tape tension value is stopped. After the difference between the actual tension and the actual tension is within a predetermined range, the calculation of the tape winding radius of the stopped delivery reel and winding reel is started.

By performing the cycle detection of the take-up reel and the delivery reel almost at the same time, the winding diameter can be detected accurately and the tape running control can be performed with high accuracy even when the tape running speed is unstable.

When the tension error of the tape is within a predetermined range, the start and end of the cycle detection of the take-up reel and the delivery reel is performed, or the tension error at the start and end of the cycle detection is detected. By doing so, it is possible to reduce the detection error of the winding diameter caused by the reels moving independently, and to perform highly accurate tape running control.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a tape running control device of the present invention will be described in detail below with reference to the accompanying drawings. <First Embodiment> FIG. 1 is a schematic configuration diagram of a first embodiment of a tape running controller according to the present invention. In FIG. 1, 1 is a tape, 2 is a take-up reel, 3 is a delivery reel, and 4 is a take-up reel motor. Further, 5 is a feed reel motor, 6 is a tape tension sensor arm, 7 is a take-up reel rotation angular velocity detector, 8 is a feed reel rotation angular velocity detector, and 9 is a tape tension detector.

Reference numeral 10 is a take-up reel cycle counter, 11 is a delivery reel cycle counter, 12 is a take-up reel rotation cycle calculator, 13 is a delivery reel rotation cycle calculator, and 14 is a total tape winding area detector. . Reference numeral 15 is a take-up reel winding diameter calculator, 16 is a sending reel winding diameter calculator, 17 is a tape actual speed calculator, and 18 is a tape target speed storage memory. Further, 19 is a tape speed error data calculator, 20 is a take-up reel motor driver (MDA), 21 is a tape tension feedforward control value calculator, and 22 is a tape target tension storing memory.

Further, 23 is a tape tension error data detector, 24 is a tape tension feedback control value calculator, 25 is an adder, 26 is a reel motor driver (MDA), and 27 is a reel rotation angle detector.
Reference numeral 8 is a rotation period calculation control unit.

In the example of FIG. 1, the winding diameters of the delivery reel 3 and the take-up reel 2 are calculated from the rotation cycles of the delivery reel 3 and the take-up reel 2, and the tension of the tape 1 is detected to determine the tape speed. It is an example of a tape running control device for controlling the tape tension.

The take-up reel rotation angle detector 7 counts a signal every time the take-up reel 2 rotates 1 / n.
To supply. Similarly, the delivery reel rotation angular velocity detector 8 supplies a signal to the counter 11 every time the delivery reel 3 rotates 1 / n _d .

The counter 10 is 1 / th of the take-up reel 2.
The cycle of n rotations is counted using a high frequency clock, and the obtained count value is supplied to the calculator 12. Similarly, the counter 11 counts the cycle of 1 / _nd rotation of the delivery reel 3 using a high frequency clock, and supplies the obtained count value to the calculator 13.

That is, as shown in FIG. 4, when the take-up reel 2 is rotated by k / n (k is a real number) ((A) of FIG. 4), the delivery reel 3 is operated by k _d / n _d (however, 2πr
_T k / n = 2πr _S k _d / n _d ) The rotation cycle is detected ((B) in FIG. 4), the cycle of both reels is detected, and the rotation cycle of the take-up reel 2 and the delivery reel 3 are detected. The rotation cycle detection is almost synchronized. As a result, it is possible to detect the rotation cycle of the take-up reel 2 and the delivery reel 3 in a state where the tape speed is almost the same.

The calculator 12 calculates the rotation cycle of the take-up reel 2 based on the count value supplied from the counter 10, and the obtained rotation cycle is calculated by the calculators 15 and 16.
And supply. Similarly, the calculator 13 calculates the rotation cycle of the delivery reel 3 based on the count value sent from the counter 11, and supplies the obtained rotation cycle to the calculators 15 and 16. Further, the total winding area detector 1 of the tape 1
Reference numeral 4 detects the total winding area of the tape 1 from the detection hole of the tape cassette, and supplies the detected total winding area to the calculator 15 and the calculator 16.

The arithmetic unit 15 calculates the take-up reel 2 based on the rotation cycle of both reels 2 and 3 and the total winding area of the tape 1.
The winding diameter is calculated and the obtained winding diameter is supplied to the calculator 17. Similarly, the calculator 16 calculates the winding diameter of the delivery reel 3 based on the rotation cycle of both reels 2 and 3 and the total winding area of the tape 1, and the obtained winding diameter is calculated by the calculators 21 and 24.
And supply.

The calculator 17 calculates the actual speed of the tape based on the count value proportional to the winding diameter and the rotation cycle of the take-up reel 2, and supplies the obtained actual speed to the calculator 19.
Further, the memory 18 stores a tape target speed corresponding to an external input signal, that is, an external command input signal such as normal reproduction, fast forward, slow, etc., and supplies the stored tape target speed to the calculator 19. .

The calculator 19 calculates the error between the actual speed of the tape 1 and the target speed, and supplies the calculated error to the MDA 20. The MDA 20 drives the take-up reel motor 4 based on the supplied speed error.

The arithmetic unit 21 calculates a feedforward tension control signal for applying a predetermined tension to the tape 1 based on the supplied winding diameter of the delivery reel 3, and the calculated motor input signal is added to the adder 25. Supply to. Further, the tension detector 9 detects the tension of the tape 1 and supplies the detected tension value to the detector 23. The memory 22 stores an external input signal, that is, a target tension corresponding to an external command input signal such as normal reproduction, fast forward, and slow, and detects the stored target tension according to the supplied external input signal. Supply to the container 23.

The detector 23 detects a tension error based on the supplied actual tape tension and target tension, and supplies the detected tension error to the calculator 24 and the controller 28. The computing unit 24 is the delivery reel 3
A signal for feedback tension control is calculated based on the winding diameter and the tension error, and the calculated signal is supplied to the adder 25.

The adder 25 adds the signals supplied from the calculator 21 and the calculator 24, and adds the added signals to the MDA2.
6 The MDA 26 drives the delivery reel motor 5 based on the supplied addition signal.

The detector 27 detects the rotation angles of the take-up reel 2 and the delivery reel 3 and supplies the detected rotation angles to the control unit 28. Based on the supplied tension error, the rotation angle, and the external input signal that determines the tape speed, the control unit 28 determines when the tension error is within a predetermined range and when the external input signal has a predetermined value. And the arithmetic unit 13 are controlled to start the operation.

In the control unit 28, the tension error is within the predetermined range, the reel rotation angle exceeds the predetermined value, and the external input signal has not changed after the operation of the arithmetic units 12 and 13 has started. At some time, the arithmetic unit 12 and the arithmetic unit 13 are controlled so as to end the operation. Here, if there is a change in the external input signal, the counter 10 and the counter 1
The count values in the arithmetic unit 12 and the arithmetic unit 13 supplied from 1 are cleared, and the arithmetic units 12 and 13 are controlled to stop their operations.

After that, when the target speed of the tape becomes zero due to the external input signal, the control unit 28 continues to stop the operation of the arithmetic unit 12 and the arithmetic unit 13 and determines that the target speed of the tape is not zero. When the tension error is within the specified range, when the specified time or more elapses,
The arithmetic unit 12 and the arithmetic unit 13 are controlled so as to start operating.

As described above, according to the first embodiment of the present invention, when the error between the target tape tension and the actual tape tension is within the predetermined range, the rotation cycle of the take-up reel 2 is detected. Since the tape traveling speed is calculated almost in synchronism with the detection of the rotation cycle of the delivery reel 3, the tape traveling speed can be detected with high accuracy, and the tape traveling control with high accuracy can be performed. It is possible to realize a tape running control device that can be performed.

The predetermined value of the rotation angle used in this embodiment is 360 ° when the tape speed is 1 ×, and (360 × m) ° when the tape speed is m ×, but any value can be used. It is obvious that the same effect can be obtained. Further, in the above-described embodiment, the rotation cycle calculation control is performed by using the rotation angle of the take-up reel 2, but it is obvious that the same effect can be obtained by using the rotation angle of the delivery reel 3. .

The method for detecting the total winding area of the tape is not limited to the above method. For example, the same result can be obtained by using a method of calculating from the reel hub diameter and the rotation cycle of both reels, or a method of calculating from the tape withdrawal amount when one reel is fixed and the rotation angle of another reel.

Further, in the method for reducing the influence of the tape tension fluctuation at the time of detecting the winding diameter used in the present embodiment, the tape tension error at the start and end of the operation of the arithmetic unit 12 and the arithmetic unit 13 is predetermined. If it is within the range, the original purpose can be achieved. Therefore, the control unit 28 causes the arithmetic unit 12 and the arithmetic unit 13 to operate.
The same effect can be obtained by storing the tape tension at the start of the operation of No. 1 and ending the operations of the arithmetic unit 12 and the arithmetic unit 13 when a predetermined tension error exceeds the stored tape tension.

<Second Embodiment> In the first embodiment of the present invention described above, calculation is performed in order to reduce the influence of tape tension fluctuation which causes deterioration when the reel winding diameter is detected. The rotation cycle of both reels is detected so that the tension error at the start and end of the operation of the device 12 and the calculator 13 is within the predetermined range, but the present invention is not limited to this.

When the tape tension fluctuates, it is considered that the tape reel path 3 absorbs all the tape path changes. In this case, the control unit 28 controls the arithmetic unit 12 and the arithmetic unit 1.
The difference between the tension error at the start of the operation of No. 3 and the tension error at the end of the operation is converted into the movement amount of the sensor arm, and the rotation cycle of the reel is corrected based on the converted movement amount and the rotation angle of the take-up reel. Can also reduce the influence of tension fluctuation.

As a second embodiment of the present invention, as described above, the amount of movement of the sensor arm is converted and the reel rotation cycle is corrected based on the converted amount of movement and the rotation angle of the take-up reel. An example of reducing the effect of tension fluctuation is possible. Note that the configuration of the second embodiment is the same as that of the first embodiment shown in FIG.

In this second embodiment, the detector 23
Supplies the detected tension error to the control unit 28. The control unit 28 determines the tension error at the start and end of the operation of the computing unit 12 and the computing unit 13 by the difference d in the moving amount of the sensor arm.
Convert to L. Further, the control unit 28 subtracts the difference dL and the previously obtained division result of the winding diameter from the rotation angle of the delivery reel 3 obtained from the detector 27, and the reel corresponding to the time when the movement amount of the arm is zero. The rotation angle is calculated, and the calculated rotation angle is sent to the calculator 12.

The arithmetic unit 12 calculates the rotation cycle of the delivery reel based on the count value obtained from the counter 10 and the rotation angle of the reel obtained from the control unit 28.

As described above, by correcting the rotation cycle of the reel based on the amount of movement of the sensor arm, the winding diameter can always be detected without being affected by tension fluctuation. Therefore, also in the second embodiment of the present invention, the above-described first
The same effect as that of the embodiment can be obtained.

In the first embodiment of the present invention described above, when the error between the target tape tension and the actual tape tension is within the predetermined range, the rotation cycle of the take-up reel 2 is detected and the reel is sent out. The rotation speed of the take-up reel 2 is calculated regardless of whether the tape tension error is within a predetermined range. The tape traveling speed may be calculated by substantially synchronizing the detection and the rotation cycle detection of the delivery reel 3.

Further, the error between the target tape tension and the actual tape tension is within the predetermined range regardless of whether the rotation cycle detection of the take-up reel 2 and the rotation cycle detection of the delivery reel 3 are not synchronized. The tape traveling speed may be calculated from time to time.

[0053]

Since the present invention is constructed as described above, the following effects can be obtained. The rotation cycle detection of the take-up reel and the rotation cycle detection of the delivery reel are performed substantially in synchronization with each other to calculate the tape running speed. Therefore, it is possible to realize a tape running control device capable of detecting the tape running speed with high accuracy and performing the tape running control with high accuracy.

The tape running speed is calculated when the error between the target tape tension and the actual tape tension is within a predetermined range. As a result, it is possible to realize a tape running control device capable of performing highly accurate tape running control as in the above.

Furthermore, when the error between the target tape tension and the actual tape tension is within a predetermined range,
The rotation cycle detection of the take-up reel and the rotation cycle detection of the delivery reel are performed substantially in synchronization with each other to calculate the tape running speed. Therefore, it is possible to realize a tape running control device capable of detecting the tape running speed with high accuracy and performing the tape running control with high accuracy.

Further, according to the present invention, even if the tape speed or the tape tension becomes unstable, the winding diameters of the feed reel and the take-up reel can be accurately calculated from the rotation cycle of the feed reel and the take-up reel. Therefore, the tape speed control or the tape tension control can be performed more accurately, and the deviation of the tape speed or the tape tension can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is an external view of a tension sensor.

FIG. 3 is an explanatory diagram of reel rotation cycle detection.

FIG. 4 is an explanatory diagram of reel rotation cycle detection.

[Explanation of symbols]

1 tape 2 take-up reel 3 feed reel 4 take-up reel motor 5 feed reel motor 6 sensor arm 7 take-up reel rotation angular velocity detector 8 feed-out reel rotation angular velocity detector 9 tape tension detector 10, 11 counter 12 take-up reel rotation Cycle calculator 13 Feed reel rotation cycle calculator 14 Tape total roll area detector 15 Take-up reel roll diameter calculator 16 Feed reel reel diameter calculator 17 Tape actual speed calculator 18 Tape target speed storage memory 19 Tape speed error data calculation Device 20 Take-up reel motor driver 21 Tape tension feedforward control value calculator 22 Tape target tension storage memory 23 Tape tension error data detector 24 Tape tension feedback control value calculator 25 Addition Vessel 26 delivery reel motor driver 27 reel rotation angle detector 28 rotation cycle calculation control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigemitsu Higuchi 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Ltd. Multimedia System Development Division

Claims (9)

[Claims] 1. A means for rotationally driving a tape feed reel and a tape take-up reel, a means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), and a rotation of the take-up reel. A means for calculating the cycle in which the delivery reel rotates by 1 / n _d (n _d is a real number) approximately in the same period as the period detection period, and the tape wound around the delivery reel and the take-up reel. Means for calculating a total winding amount, means for calculating a winding radius of the tape on the take-up reel based on a rotation cycle of the delivery reel, a rotation cycle of the take-up reel, and a total winding quantity of the tape, Means for calculating the actual speed of the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel, and a memory device for storing the target speed of the tape. And means for calculating the running speed error of the tape based on the actual speed of the tape and the target speed, and controlling the rotation of the means for rotationally driving the reel based on the calculated running speed error of the tape. A tape running control device comprising: rotation control means; 2. A delivery reel driving means for driving the tape delivery reel to rotate, and a take-up reel driving means for rotating the take-up reel so that the tape is taken up from the tape delivery reel to the tape take-up reel. Means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), means for calculating a cycle in which the delivery reel rotates by 1 / n _d (n _d is a real number), and the delivery reel A means for detecting the total winding amount of the tape wound on the take-up reel, a means for detecting the actual tension of the tape, a tension memory means for storing the target tension of the tape, and an actual tension of the tape. A means for calculating a tension error from the target tension, a means for correcting the rotation cycle of the delivery reel based on the tension error, and a corrected delivery reel. Means for calculating the winding radius of the tape on the take-up reel based on the rotation cycle of the take-up reel, the rotation cycle of the take-up reel, and the total winding amount of the tape; Based on the rotation cycle of the take-up reel and the total winding amount of the tape,
Means for calculating the winding diameter of the feed reel, means for calculating the actual speed of the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel, and storing the target speed of the tape Speed memory means, means for calculating a tape running speed error based on the tape actual speed and the target speed, and rotation of the take-up reel rotation driving means based on the tape running speed error. Rotation control means to control the, and so that the delivery reel applies a predetermined tension to the tape,
A means for calculating a first input signal to be supplied to the delivery reel drive means based on the winding diameter of the delivery reel, and a tension error of zero based on the tension error of the tape and the winding diameter of the delivery reel. Means for calculating a second input signal to be supplied to the delivery reel driving means, means for adding the first input signal and the second input signal of the delivery reel driving means, and the added data Based on the above, there is provided means for controlling the rotation of the delivery reel driving means, and a tape running control device. 3. A delivery reel driving means for rotating the tape delivery reel, and a take-up reel drive means for rotating the take-up reel so that the tape is taken up from the tape delivery reel to the tape take-up reel. Means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), means for calculating a cycle in which the delivery reel rotates by 1 / n _d (n _d is a real number), and the delivery reel A means for detecting the total winding amount of the tape wound on the take-up reel, a means for detecting the actual tension of the tape, a tension memory means for storing the target tension of the tape, and an actual tension of the tape. A means for calculating a tension error from the target tension, and a rotation cycle of the feed reel and a take-up reel when the tension error of the tape is within a predetermined range. Means for calculating the winding radius of the tape on the take-up reel based on the rotation cycle and the total winding amount of the tape, and the rotation cycle of the delivery reel and the winding time when the tension error of the tape is within a predetermined range. Means for calculating the winding diameter of the delivery reel based on the rotation cycle of the take-up reel and the total winding amount of the tape; and the tape based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel. Means for calculating the actual speed of the tape, speed memory means for storing the target speed of the tape, means for calculating the running speed error of the tape based on the actual speed of the tape and the target speed, and the running of the tape. Based on the speed error, rotation control means for controlling the rotation of the rotation driving means of the take-up reel, and so that the delivery reel applies a predetermined tension to the tape,
A means for calculating a first input signal to be supplied to the delivery reel drive means based on the winding diameter of the delivery reel, and a tension error of zero based on the tension error of the tape and the winding diameter of the delivery reel. Means for calculating a second input signal to be supplied to the delivery reel driving means, means for adding the first input signal and the second input signal of the delivery reel driving means, and the added data Based on the above, there is provided means for controlling the rotation of the delivery reel driving means, and a tape running control device. 4. A feed reel driving means for rotating the tape feed reel, and a take-up reel drive means for rotating the take-up reel so that the tape is wound from the tape feed reel onto the tape take-up reel. A means for calculating a cycle in which the take-up reel rotates by 1 / n (n is a real number), and a period in which the take-up reel detects a rotation cycle of the take-up reel, 1 / n _d (n _d : A real number), a means for calculating the cycle of rotation, a means for detecting the total winding amount of the tape wound on the feed reel and the take-up reel, a means for detecting the actual tension of the tape, and a tape target. Tension memory means for storing the tension, means for calculating the tension error between the actual tension of the tape and the target tension, and the feeding based on the tension error. And a winding radius of the tape on the take-up reel, based on the corrected rotation cycle of the feed reel, the rotation cycle of the take-up reel, and the total winding amount of the tape. Means, based on the corrected rotation cycle of the delivery reel, the rotation cycle of the take-up reel, and the total winding amount of the tape,
Means for calculating the winding diameter of the delivery reel, means for calculating the actual tape speed based on the tape winding radius of the take-up reel and the rotation cycle of the take-up reel, and storing the target speed of the tape Speed memory means, means for calculating a tape running speed error based on the tape actual speed and the target speed, and rotation of the take-up reel rotation driving means based on the tape running speed error. Rotation control means to control the, and so that the delivery reel applies a predetermined tension to the tape,
Means for calculating a first input signal to be supplied to the delivery reel drive means based on the winding diameter of the delivery reel, and zero tension error based on the tension error of the tape and the winding diameter of the delivery reel. Means for calculating a second input signal to be supplied to the delivery reel driving means, means for adding the first input signal and the second input signal of the delivery reel driving means, and the added data. Based on the above, there is provided means for controlling the rotation of the delivery reel driving means, and a tape running control device. 5. The tape running control device according to claim 1 or 4, wherein the means for calculating the tape winding radius of the take-up reel runs the tape at m times a predetermined speed (m is a real number exceeding 0). The tape running control device is characterized in that the tape winding radius of the take-up reel is calculated once every m rotations of the take-up reel. 6. The tape running control device according to claim 1 or 4, wherein the means for calculating the tape winding radius of the take-up reel is a take-up reel at a rate of once per one revolution of the take-up reel. A tape running control device for calculating the tape winding radius of the tape. 7. The tape traveling speed control device according to claim 1, wherein the tape winding radius of the take-up reel is calculated by a means for calculating the tape winding radius of the take-up reel when the tape traveling speed is substantially zero. A tape running control device characterized by stopping the calculation of the tape winding radius. 8. The tape running speed control device according to claim 3, wherein the target tension is an actual tension of the tape detected at the start of calculation of the rotation cycle of the delivery reel. . 9. The tape running control device according to claim 3, wherein when the target speed is changed while the tape is running,
The calculation of the tape winding radius of the delivery reel and the take-up reel is stopped, and after the difference between the target tape tension value and the actual tape tension is within a predetermined range, the delivery reel and the take-up reel stopped. A tape running control device, characterized in that the calculation of the tape winding radius is started.