CN1154545A - Device for detecting cut of tape - Google Patents
Device for detecting cut of tape Download PDFInfo
- Publication number
- CN1154545A CN1154545A CN 96122048 CN96122048A CN1154545A CN 1154545 A CN1154545 A CN 1154545A CN 96122048 CN96122048 CN 96122048 CN 96122048 A CN96122048 A CN 96122048A CN 1154545 A CN1154545 A CN 1154545A
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- gear
- detection
- pulse
- tape
- rotation
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Abstract
A device for detecting cut of a tape generates a cut signal of a tape by using a pulse generating portion and a light signal generating portion when a number of pulses per second generated by the rotation of a detecting gear is larger than the maximum number of pulses per second during normal operation. A first gear is rotated by a rotation driving part in forward play operation mode of a tape. A second gear is rotated by the rotation driving part in reverse play operation mode of the tape. A detecting gear of a detecting gear portion is engaged with the first gear or the second gear according to the operation mode. A pulse generating portion generates pulses corresponding to a speed of revolution of the detecting gear and a light signal generating and pulse detecting portion detects the generated pulses. A microprocessor decides the revolution state of the engaged gear from the number of detected pulses per second.
Description
The present invention relates to a kind of device for detecting cut of tape, relate in particular to a kind ofly, promptly detect the device for detecting cut of tape of cutting band by the detection of gear speed difference according to the tape state.
Normally, resemble video tape recorder, blattnerphone, equipment such as dribbling reader comprise the drive system of a rotation tep reel.This drive system comprises carries out tape gear of putting forward of tape reel forward and the reverse tape dish gear that reverses and play a tape.Each gear is pressed mode of operation as main rotation gear or follower gear.Tape with main rolling disc gear forward around or backward around.
In above-mentioned equipment, use microcomputer to control the rotation of main rolling disc gear.System controlled by computer master rolling disc gear stops the rotation when input abort signal or end signal.If will cut band during operation, cut carrier state owing to can not discern, the main rolling disc gear that links to each other with drive system continues rotation, and the follower gear that links to each other with drive system does not then stop the rotation.As a result, because microcomputer can not be discerned and cut band, the user often waits as long for the open operation state.Therefore, having proposed various detections cuts the equipment and the method for band and cuts band with detection.
Fig. 1 is the synoptic diagram that detects the conventional apparatus of cutting band.This detection is cut belting and respectively is included in when putting mode of operation before the tape, is divided the gear of tape reel forward 100 of (not shown) rotation and when the proceed backward magnetic tape mode of operation, is divided the reverse tape dish gear 200 of rotation by rotary driving part by rotary driving part.Tape reel gear 100 comprises first optical pulse generator forward.First optical pulse generator comprises first rotating disc 110 that rotates with the rotation of tape reel gear 100 forward, with first optical sensor 120 that is positioned on precalculated position, first rotating disc, 110 below, first rotating disc 110 comprises being used to reflect from four first photo-emission parts of the light of first optical sensor, 120 outputs and divides 112 and be used to absorb four first absorption portion 114 of described light.
Reverse tape dish gear 200 comprises second optical pulse generator.Second optical pulse generator comprises second optical sensor 220 on second rotating disc 210 that rotates with the rotation of reverse tape dish gear 200 and the precalculated position, below that is positioned on second rotating disc 210.Second rotating disc 210 comprises being used to reflect from four second photo-emission parts of the light of second optical sensor, 220 outputs and divides 212 and absorb four second absorption portion 214 of described light.
The operating process that the conventional apparatus of band is cut in detection with said structure will illustrate hereinafter in conjunction with Fig. 1 and Fig. 2.
The microcomputer (not shown) detects the existence of input signal (S1).If have input signal, microcomputer to move first and second optical sensors 120,220.
Then, microcomputer judge this input signal whether indicate play the method for operation (S3) forward, if result of determination is for true owing to be master gear (S4) to shroud gear 100, rotary driving part divides (not shown) and links to each other to shroud gear 100.If the result is false, because counter-rotating dish gear 200 is master gear (S5), rotary driving part divides and links to each other with counter-rotating dish gear 200.
When rotary driving part divided the rotation of drive master, tape was on the periphery of main rotating disc gear.Because tape makes follower gear rotate on main rotating disc gear.
The light that sends from first and second optical sensors 120,220 arrives first and second rotating discs 110,210 with the rotation of main rotating disc gear and clutch plate gear, has produced pulse thus.Pulse repetition rate (the P that Microcomputer Calculation produces with main rotating disc gear rotation
1) and rotate the pulse repetition rate (P of generation with the clutch plate gear
2) (S
5).
When cutting band, rotary driving part divides driving master gear to continue rotation, and because the clutch plate gear does not divide with rotary driving part and links to each other, the clutch plate gear rotates by means of inertia effect.Therefore, because the clutch plate gear at first stops, microcomputer is checked P
2Whether be zero (S6).Work as P
2When being zero, microcomputer is cut band signal (S7) by determining to cut carrier state and export.If P
2Be not equal to zero, Microcomputer Calculation should be rotated the pulse that produces by the dish gear.
If input signal is not to relay before the indication to put the signal of operational mode, because counter-rotating dish gear 200 is main rotating disc gear, microcomputer divides rotary driving part and is communicated with counter-rotating dish gear 200.Move by described order afterwards.
The device that traditional detection is cut band is positioned on shroud gear 100 and counter-rotating dish gear 200 owing to first and second optical pulse generators, to calculate the pulse that produces with the rotation to shroud gear 100 and counter-rotating dish gear 200, so its complex structure.
In addition, in mode of operation, when cutting band, rotary driving part divides the main rotating disc gear of drive to continue rotation, and the clutch plate gear continues rotation under inertia effect.Therefore, because just detecting after stopping the rotation fully, follower gear cuts band, so the time that is used to detect is long.
Therefore, the object of the present invention is to provide a kind of pulse generation part and light signal generation and pulse detection simple detection partly of comprising to cut belting.
Another object of the present invention provides a kind of detection and cuts belting, when it cuts band in operational process, by detecting the difference of the gear rotational speed that produces owing to the tape state, cuts carrier state and promptly indicate.
For finishing above-mentioned purpose of the present invention, the invention provides a kind of clamping apparatus for disc, first gear that divides rotation when it is included in play mode forward by rotary driving part, with when the reverse-play model tape, by rotary driving part divide second gear of rotation and be used to detect by ruuning situation selectively with the detection of gear part of the rotary state of the gear of first gear or second gearing mesh.
Described detection of gear partly comprises detection of gear, first connection gear, and second connection gear, the pulse generation part, light signal takes place and pulse detection part and microcomputer.Because according to running status, detection of gear is meshed through first connection gear and first gear, or is meshed through second connection gear and second gear, it rotates with the rotation of institute's meshed gears.Pulse generation fixing and that be installed on the detection of gear partly comprises reflecting part and absorption portion.Because reflecting part and absorption portion radially and are alternately arranged, so pulse generation has partly produced the pulse corresponding to the detection of gear rotating speed.
By using pulse generation part and light signal to take place and the pulse detection part, make the detection of device for detecting cut of tape cut the simple in structure of band.
Device for detecting cut of tape of the present invention in addition is by judging in detection of gear during optionally with first gear or second gearing mesh, and whether the rotating speed of detection of gear part is in to detect within the range of speeds of normal running is cut band signal.When promptly the maximum number of pulses that produces than normal running by the umber of pulse that produces by the rotation of detection of gear is big, is defined as cutting carrier state and produces and cut band signal.Thus, make from cut the band begin to shorten greatly to the time interval of cutting band.The result obtains the information of operating mistake rapidly.
The features and advantages of the present invention will be by clearer in conjunction with following accompanying drawing detailed description of preferred embodiments, in the accompanying drawing:
Fig. 1 is the synoptic diagram that traditional detection is cut belting;
Fig. 2 is the process flow diagram of cutting the band testing process of traditional device for detecting cut of tape;
Fig. 3 is the synoptic diagram of device for detecting cut of tape of the present invention;
Fig. 4 is the process flow diagram of cutting the band testing process of device for detecting cut of tape of the present invention.
Describe the structure of device for detecting cut of tape of the present invention in detail in conjunction with Fig. 3.
As shown in Figure 3, device for detecting cut of tape comprises first gear, 300, the second gears 400, detection of gear part 500.Divide (not shown) optionally to link to each other by rotary driving part and rotate first gear 300 and second gear 400 with each gear by mode of operation.
Detection of gear part 500 is installed between first gear 300 and second gear 400, so that detect the rotating speed of first gear 300 or second gear 400 by mode of operation.Detection of gear part 500 comprises detection of gear 510, the first connection gear 570, the second connection gear 590, pulse generation part 530, and light signal takes place and pulse detection part and microcomputer (not shown).Light signal takes place and pulse detection part 550 is photodetectors.
In play operation pattern forward, first connection gear 570 is meshed first gear 300 and detection of gear 510.In the reverse-play operator scheme, second connection gear 590 is meshed second gear 400 and detection of gear 510.
In play operation pattern forward, because detection of gear 510 is meshed through first connection gear 570 and first gear 300, detection of gear 510 is rotated with the rotation of first gear 300.And in detection of gear 510 when second connection gear 590 and second gear 400 are meshed, detection of gear 510 is rotated with the rotation of second gear 400.
Pulse generation part 530 is fixedly mounted on the detection of gear 510, produces pulse with the rotation with detection of gear 510.Pulse generating portion 530 comprises that reflection generates and four reflecting parts 533 of the light that pulse detection part 550 is sent and absorb four absorption portion 537 of described light beam from light signal, with the rotation number of detection detection of gear 510.Reflecting part 533 and absorption portion 537 are alternately being arranged in the radial direction.
Light signal is installed is taken place and pulse detection part 550, with to pulse generation part 530 emission light beams, and received pulse generation part 530 is with the rotation of detection of gear 510 pulse with this light beam generation.
The microcomputer (not shown) takes place and pulse detection part 550 detected umber of pulses with light signal, determines the rotary state of the gear that is meshed with detection of gear part 500.
Describe the operation of the device for detecting cut of tape in one embodiment of the present of invention below in detail.
In the time of in tape is placed to device, import play operation signal (ST1) forward to microcomputer.Micom drives photodetector (ST2) then.Microcomputer judges that whether the signal of input is play signal (ST3) forward.If input signal is a play signal forward, rotary driving part divides and links to each other with first gear 510, thereby first connection gear 570 makes first gear 300 and detection of gear be meshed (ST4).First gear 300 is rotated counterclockwise with the rotation that rotary driving part divides.First connection gear 570 turns clockwise with the rotation of first gear 300.The detection of gear 510 of detection of gear part 500 is rotated counterclockwise with the rotation of first connection gear 570.
With the rotation of detection of gear 510, take place and pulse detection part 550 emitted light beams directive pulse generation parts 530 from light signal, this light beam arrives a bit of pulse generation part then.Because the rotation of pulse generation part 530, reflecting part 533 and absorption portion 537 generate light pulse, in the light pulse input optical signal that is generated generation and the pulse detection part 550.
In normal manipulation mode, that is, in operator scheme forward, when operator scheme brought into operation, detection of gear 510 was maximal value, for example 87rpm with the rotation number of first gear, 300 rotations in one minute; And when operator scheme finishes, be minimum value, 38rpm for example.
Therefore, light signal takes place and pulse detection part 550 detects, and is maximal value (Dmax) with the umber of pulse of the rotation per second of first gear 300 in the starting point of operator scheme, and is minimum value (Dmin) at terminal point.Because pulse generation part 530 of the present invention is used four reflecting parts 533 and four absorption portion 537, the value of the detected umber of pulse of per second (D) is between 2.5 (Dmin) and 5.8 (Dmax).
When abnormal operation, in the time of promptly will cutting band, the speed of the unstrained normal operation of rotating ratio of first gear, 300 rotations is fast.The rotating speed D of detection of gear per minute for example, is 284rpm.Therefore, the pulses per second D that detects with light signal generation and pulse detection part 550 is 18.9.This value three times of maximal value Dmax when the normal operation.
Therefore, the pulse (ST5) of Microcomputer Calculation detection of gear 510 generations.Afterwards, microcomputer is the umber of pulse and the Dmax that calculate, as 10 compare (ST6).If the umber of pulse of calculating is bigger than Dmax, microcomputer just produces and cuts band signal (ST7).
When the signal of input when being the reverse-play operation signal, rotary driving part divides and links to each other with second gear 400, and second connection gear 500 is with second gear 400 link to each other with detection of gear 510 (ST8).
Device for detecting cut of tape of the present invention, owing to used pulse generation part and light signal that part and pulse detection part take place, detect the rotation that is meshed with first gear or second gear selectively by operator scheme and drive the rotation number of the detection of gear of its rotation, thereby simplify the structure.
Because traditional device for detecting cut of tape just can define and cut carrier state to the shroud gear with when the rotation of the follower gear in the plate wheel stops fully backward, detection cut with the required time long.Device for detecting cut of tape of the present invention by when detection of gear by operator scheme during selectively with first gear or second gearing mesh, whether the rotating speed of judgement detection of gear in the range of speeds when normal running, detects rapidly and cuts band signal.That is, when the maximum number of pulses that the umber of pulse that produces when detection of gear rotation produces than normal running is also big, generate all band signals.Thus, cut band constantly and produce and cut the interval of band signal between constantly and shortened.Therefore, can obtain the information of operation exception rapidly.
The present invention has carried out concrete displaying and explanation with regard to its preferred embodiment after, be to be understood that for a person skilled in the art, not deviating within creation spirit of the present invention and the scope of the present invention as defined by the appended claims, obviously can carry out the change of various forms and details.
Claims (7)
1, a kind of device for detecting cut of tape, it comprises:
When play operation pattern forward, by first gear of playing tape forward of rotating driving device rotation;
When play operation pattern backward, play second gear of tape backward by described rotating driving device rotation;
One selects detection of gear device with described first gear or second gearing mesh by operator scheme, is used to detect the rotary state with its meshed gears,
It is characterized in that described detection of gear device comprises:
One with the detection of gear of rotating with its meshed gears;
One produces the pulse generating unit of pulse corresponding to the rotating speed of described detection of gear;
One light signal takes place and pulse detecting equipment, is used for to described pulse generating unit emission light beam, and receives the pulse that is produced by described light beam from described pulse generating unit; With
Take place and the detected pulse of pulse detecting equipment by described light signal, determine the microcomputer of the rotary state of described institute meshed gears.
2, a kind of device for detecting cut of tape as claimed in claim 1, it is characterized in that, when the detected pulses per second of the described pulse detecting equipment pulses per second that described detection of gear rotation produces during than normal running was also big, described microcomputer produced all band signals.
3, a kind of device for detecting cut of tape as claimed in claim 1, it is characterized in that, described pulse generating unit is fixedly mounted on the described detection of gear, it comprises reflection unit that reflects described light beam and the absorption plant that absorbs described light beam, when it rotates in described detection of gear, because described reflection unit and described absorption plant are arranged at radially alternating, produce pulse corresponding to rotating speed.
4, a kind of device for detecting cut of tape as claimed in claim 3 is characterized in that, the number of described reflection unit should be greater than 1.
5, a kind of device for detecting cut of tape as claimed in claim 3 is characterized in that, the number of described absorption plant should be greater than 1.
6, a kind of device for detecting cut of tape comprises:
When play operation pattern forward, by the rotating driving device rotation to play first gear of tape forward;
When play operation pattern backward by described rotating driving device rotation to play second gear of tape backward; With
One selects and described first gear or second gearing mesh by operator scheme, with the detection of gear device of the rotation status that detects institute's meshing gear;
It is characterized in that described detection of gear device comprises:
One detection of gear of rotating with institute's meshed gears;
One is fixedly mounted on the pulse generating unit on the described detection of gear, it comprises reflection unit that reflects described light beam and the absorption plant that absorbs described light beam, and when described detection of gear is rotated, because described reflection unit and described absorption plant are arranged at radially alternating, produce pulse corresponding to rotating speed;
One light signal takes place and pulse detecting equipment, is used for sending light beam to described pulse generating unit, and receives the pulse that is generated by described light beam from described pulse generating unit; With
When the detected pulses per second of the described pulse detecting equipment pulses per second that described detection of gear rotation produces during than normal running is big, generate the microcomputer of all band signals.
7, a kind of device for detecting cut of tape, it comprises:
When play operation pattern forward, by the rotating driving device rotation to play first gear of tape forward;
When play operation pattern backward, by described rotating driving device rotation to play second gear of tape backward; With
One selects and described first gear or second gearing mesh by operator scheme, with the detection of gear device of the rotation situation that detects institute's meshed gears;
It is characterized in that described detection of gear device comprises:
One detection of gear of rotating with institute's meshing gear;
By first connection gear of operator scheme with described first gear and the engagement of described detection of gear;
By second connection gear of operator scheme with described second gear and the engagement of described detection of gear;
One is fixedly mounted on the pulse generating unit on the described detection of gear, it comprises the reflection unit that reflects described light beam, with the absorption plant that absorbs described light beam, and when described detection of gear is rotated, because described reflection unit and described absorption plant are arranged at radially alternating, produce pulse corresponding to rotating speed;
One light signal takes place and pulse detecting equipment, is used for to described pulse generating unit emission light beam, and receives the pulse that is produced by described light beam from described pulse generating unit; With
When the detected pulses per second of the described pulse detecting equipment pulses per second that described detection of gear rotation produces during than normal running is big, generate the microcomputer of all band signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96122048 CN1154545A (en) | 1995-09-29 | 1996-09-29 | Device for detecting cut of tape |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR32828/95 | 1995-09-29 | ||
| CN 96122048 CN1154545A (en) | 1995-09-29 | 1996-09-29 | Device for detecting cut of tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1154545A true CN1154545A (en) | 1997-07-16 |
Family
ID=5127061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96122048 Pending CN1154545A (en) | 1995-09-29 | 1996-09-29 | Device for detecting cut of tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1154545A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516106A (en) * | 2013-09-27 | 2015-04-15 | 日本电产株式会社 | Mirror rotating apparatus |
-
1996
- 1996-09-29 CN CN 96122048 patent/CN1154545A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516106A (en) * | 2013-09-27 | 2015-04-15 | 日本电产株式会社 | Mirror rotating apparatus |
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