CN105277998A - Method and system for detecting drum wheel negative-pressure hole blocking rate - Google Patents
Method and system for detecting drum wheel negative-pressure hole blocking rate Download PDFInfo
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- CN105277998A CN105277998A CN201510828608.8A CN201510828608A CN105277998A CN 105277998 A CN105277998 A CN 105277998A CN 201510828608 A CN201510828608 A CN 201510828608A CN 105277998 A CN105277998 A CN 105277998A
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Abstract
The invention discloses a method and a system for detecting the drum wheel negative voltage hole blocking rate, and relates to the tobacco automatic control technology field, wherein the method for detecting the drum wheel negative-pressure hole blocking rate comprises: determining a detecting voltage value outputted by an opposite-type photoelectric detector when negative-pressure holes rotated with a drum wheel are operated to the opposite-type photoelectric detector; acquiring a reference voltage value outputted by the opposite-type photoelectric detector when the negative-pressure holes are operated to the opposite-type photoelectric detector under the condition of not blocking; and determining the blocking rate of the negative-pressure holes based on the voltage value and the reference voltage value that are detected. According to the invention, the blocking rate of the negative voltage hole is detected effectively, thereby providing accurate reference basis for the maintenance to the drum wheel by an operator; and at the same time, the occurrence rate of stopping accidents due to the blocking of the negative-pressure holes is reduced, thereby improving the production efficiency and the production quality of cigarette.
Description
Technical field
The present invention relates to tobacco technical field of automatic control, especially a kind of detection system of drum negative pressure hole plugging rate.
Background technology
Fig. 1 is the schematic diagram of the operation of cigarette on drum.As shown in Figure 1, the spicing machine of rolling up and connecting machine by cigarette 1 by negative-pressure adsorption on the groove 3 of the external drum 2 of drum, cigarette 1 is run together along with drum, the encapsulation process of the cigarette that has been in operation.
Fig. 2 is the external drum schematic diagram of drum; Fig. 3 is the cross-sectional view of drum; Fig. 4 is the cross-sectional view of the drum having cigarette.As shown in Figures 2 to 4, drum is made up of external drum 2 and interior drum 5, and interior drum 5 is fixed, and interior drum 5 pairs of external drums 2 are played a supporting role, and external drum 2 is mechanically connected by bearing (not shown) with interior drum 5.External drum 2 is rotated along fixed-direction under the drive of main transmission, the groove 3 of external drum 2 there is negative pressure hole 4, negative pressure hole 4 is connected to the negative pressure cavity 6 between external drum 2 and interior drum 5, pass into negative pressure when machine runs to negative pressure cavity 6, thus cigarette 1 can be adsorbed on drum groove 3 by negative pressure by negative pressure hole 4.
The present inventor finds, along with the operation of machine, offal will build up on negative pressure hole 4, namely negative pressure hole 4 can block, and the area of blocking is larger, and negative pressure negative pressure hole 4 holding cigarette 1 is less, cigarette 1 is more unstable, the instability of cigarette 1 will affect the quality of production of cigarette, increases rejection number, reduces the operational efficiency of machine.
Summary of the invention
An embodiment of the present invention technical matters to be solved is: the detection method and the system that provide a kind of drum negative pressure hole plugging rate, effectively can detect the plugging rate of drum negative pressure hole.
According to an aspect of the present invention, a kind of detection method of drum negative pressure hole plugging rate being provided, comprising: determining the negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector with rotating drum; Obtain the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports; The plugging rate of described negative pressure hole is determined according to described detection magnitude of voltage and described reference voltage level.
In one embodiment, before obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports, also comprise: obtain the position signalling that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, absolute value shaft encoder exports; When detecting that absolute value shaft encoder exports described position signalling, determine that described negative pressure hole moves to correlation photoelectric detector; Wherein, described absolute value shaft encoder is arranged on the gear train of drum, rotating drum one week, the even outgoing position signal of described absolute value shaft encoder.
In one embodiment, the plugging rate of negative pressure hole according to following formulae discovery: H=1-v/V; Wherein, H represents the plugging rate of described negative pressure hole, v represents the described negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
In one embodiment, transmitting terminal and the receiving end of described correlation photoelectric detector are arranged on the straight line at radial place of described drum, and one of them is arranged on Nei Gushang, and another is arranged on the outside of external drum.
In one embodiment, the sectional area of ray regions that described transmitting terminal sends is not less than the area of described negative pressure hole.
In one embodiment, described method also comprises: send to display to show the plugging rate of described negative pressure hole.
According to a further aspect in the invention, a kind of detection system of drum negative pressure hole plugging rate is provided, comprises: correlation photoelectric detector, for the output detections magnitude of voltage when the negative pressure hole with rotating drum moves to correlation photoelectric detector to controller; Controller, for obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports; The plugging rate of described negative pressure hole is determined according to described detection magnitude of voltage and described reference voltage level.
In one embodiment, described system also comprises: absolute value shaft encoder, is arranged on the gear train of drum, for the outgoing position signal when described negative pressure hole moves to correlation photoelectric detector in unplugged situation to controller; Rotating drum one week, described absolute value shaft encoder evenly exports the position signalling identical with negative pressure hole quantity; Described controller, before obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports, also for determining that described negative pressure hole moves to correlation photoelectric detector when detecting that described absolute value shaft encoder exports described position signalling.
In one embodiment, the plugging rate of described controller negative pressure hole according to following formulae discovery: H=1-v/V; Wherein, H represents the plugging rate of described negative pressure hole, v represents the described negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
In one embodiment, transmitting terminal and the receiving end of described correlation photoelectric detector are arranged on the straight line at radial place of described drum, and one of them is arranged on Nei Gushang, and another is arranged on the outside of external drum.
In one embodiment, the sectional area of ray regions that described transmitting terminal sends is not less than the area of described negative pressure hole.
In one embodiment, described controller, also for sending to display to show the plugging rate of described negative pressure hole; Described system also comprises: display, for showing the plugging rate of described negative pressure hole.
The present invention utilizes correlation photoelectric detector to obtain the detection magnitude of voltage of negative pressure hole in real work and the reference voltage level of negative pressure hole in unplugged situation; thus realize effective detection of negative pressure hole plugging rate; for the maintenance of operating personnel to drum provides accurate reference frame; reduce the incidence of the stopping accident that the blocking due to negative pressure hole causes, improve production efficiency and the quality of production of cigarette.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the operation of cigarette on drum;
Fig. 2 is the external drum schematic diagram of drum;
Fig. 3 is the cross-sectional view of drum;
Fig. 4 is the cross-sectional view of the drum having cigarette;
Fig. 5 is the schematic flow sheet of a detection method embodiment of drum negative pressure hole plugging rate of the present invention;
Fig. 6 shows the scheme of installation of correlation photoelectric detector of the present invention;
Fig. 7 is the schematic diagram of absolute value shaft encoder of the present invention;
Fig. 8 is the schematic diagram of the position signalling that absolute value shaft encoder of the present invention exports;
Fig. 9 shows the detection sequential chart of negative pressure hole plugging rate;
Figure 10 shows the schematic diagram of negative pressure hole in unplugged situation;
Figure 11 shows the schematic diagram of negative pressure hole when there being blocking;
Figure 12 is the block diagram of a detection system embodiment of drum negative pressure hole plugging rate of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing instructions.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 5 is the schematic flow sheet of a detection method embodiment of drum negative pressure hole plugging rate of the present invention.As shown in Figure 5, the method comprises the steps:
Step 502, determines the negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector with rotating drum.
Step 504, obtains the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
Step 506, according to the plugging rate detecting magnitude of voltage and reference voltage level determination negative pressure hole.
Referring to Fig. 6, the detection method of drum negative pressure hole plugging rate is described in detail.
Fig. 6 shows the scheme of installation of correlation photoelectric detector.As shown in Figure 6, correlation photoelectric detector comprises transmitting terminal 10 and receiving end 11, transmitting terminal 10 sends equally distributed light, receiving end 11 receives light that transmitting terminal 10 sends and light signal is converted into voltage signal, then using the output voltage of the voltage signal after conversion as correlation photoelectric detector, wherein, the size of output voltage signal is directly proportional to the light quantity of reception.Preferably, transmitting terminal 10 and the receiving end 11 of correlation photoelectric detector are arranged on the straight line at radial place of drum, and transmitting terminal 10 and receiving end 11 one of them be arranged on Nei Gushang, another is arranged on the outside of external drum.Such as, as shown in Figure 6, transmitting terminal 10 is fixedly installed on interior drum 5, and receiving end 11 is arranged on the outside of external drum 6 regularly, and vice versa.In order to improve the correctness of testing result, in one embodiment, the sectional area of the ray regions that transmitting terminal 10 sends is not less than the area of negative pressure hole 4, namely, when negative pressure hole 4 moves to the straight line at transmitting terminal 10 and receiving end 11 place, the light that transmitting terminal 10 sends is wanted to cover whole negative pressure hole 4.If the light that transmitting terminal 10 sends cannot cover whole negative pressure hole 4, when negative pressure hole 4 blocking is not occurred by the region that light covers, then cannot be detected, thus affect the accuracy of testing result.
When practical application, the reference voltage level that when whole negative pressure holes that can pre-determine drum move to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.Such as, each negative pressure hole of manual confirmation drum does not all block, revolving drum, when negative pressure hole moves to correlation photoelectric detector, when namely moving to the straight line at transmitting terminal 10 and receiving end 11 place, record the reference voltage level that now correlation photoelectric detector exports, so can obtain the reference voltage level that when each negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
During drum work, when certain negative pressure hole is when moving to correlation photoelectric detector, determine now correlation photoelectric detector output detections magnitude of voltage.Then, obtain the reference voltage level that this negative pressure hole is corresponding, thus can according to the plugging rate detecting magnitude of voltage and reference voltage level determination negative pressure hole.In addition, can also display be sent to show the plugging rate of negative pressure hole.
The present embodiment utilizes correlation photoelectric detector to obtain the detection magnitude of voltage of negative pressure hole in real work and the reference voltage level of negative pressure hole in unplugged situation; thus realize effective detection of negative pressure hole plugging rate; for the maintenance of operating personnel to drum provides accurate reference frame; reduce the incidence of the stopping accident that the blocking due to negative pressure hole causes, improve production efficiency and the quality of production of cigarette.
When different negative pressure holes moves to correlation photoelectric detector, need to obtain reference voltage level corresponding to different negative pressure holes.Be the current reference voltage level moving to the negative pressure hole of correlation photoelectric detector in order to ensure the reference voltage level got, the position signalling that the present invention proposes absolute value shaft encoder exports is mapped from different negative pressure holes.Particularly, in one embodiment, before obtaining the reference voltage level that when negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports, said method can also comprise: obtain the position signalling that when negative pressure hole moves to correlation photoelectric detector in unplugged situation, absolute value shaft encoder exports; When absolute value shaft encoder outgoing position signal being detected, determine that described negative pressure hole moves to correlation photoelectric detector; Wherein, absolute value shaft encoder is arranged on the gear train of drum, rotating drum one week, the even outgoing position signal of absolute value shaft encoder.
Fig. 7 is the schematic diagram of absolute value shaft encoder of the present invention.Fig. 8 is the schematic diagram of the position signalling that absolute value shaft encoder of the present invention exports.As shown in Figure 7 and Figure 8, a circle is often rotated in the rotating shaft 8 of absolute value shaft encoder 7, and namely in one-period, signal end 9 evenly exports 2
nindividual digital signal: 0,1,2 ... 2
n-1, each digital signal is with the position one_to_one corresponding of rotating shaft 8.
In actual applications, 1,2,3 can be marked on N number of negative pressure hole of drum ... N (see Fig. 6).Following calibration process can be carried out: when each negative pressure hole of manual confirmation drum does not all block before first time is detected, revolving drum, when label is i (i=1,2,3 ... N), when negative pressure hole moves to the center of transmitting terminal and receiving end, recording the position signalling that now absolute value shaft encoder exports is E
i, the reference voltage level that correlation photoelectric detector exports is V
i, in the same way each negative pressure hole is measured, thus obtains the position signalling E of each negative pressure hole
1, E
2, E
3e
nand the reference voltage level V of each negative pressure hole in unplugged situation
1, V
2, V
3v
n.Therefore, the detection magnitude of voltage v of certain negative pressure hole is determined
iafter, when detecting that the position signalling that absolute value shaft encoder exports is E
itime, can determine that negative pressure hole i moves to correlation photoelectric detector, then can perform the operation of subsequent step 504 and step 506, thus obtain the reference voltage level of negative pressure hole i.Fig. 9 shows the detection sequential chart of negative pressure hole plugging rate.
In one embodiment, can according to the plugging rate of following formulae discovery negative pressure hole:
H＝1-v/V
Wherein, H represents the plugging rate of negative pressure hole, v represents the negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
Figure 10 and Figure 11 respectively illustrates the schematic diagram of negative pressure hole when not blocking and have a blocking.Below in conjunction with Figure 10 and Figure 11, the plugging rate formula of above-mentioned negative pressure hole is derived:
As shown in Figure 10, the negative pressure hole 4 not occurring to block moves to the transmitting terminal 10 of correlation photoelectric detector and the center of receiving end 11, and the area of this negative pressure hole 4 is S
aBCD.Transmitting terminal 10 sends equally distributed light, and the light quantity in unit area is F, then now have area to be S
aBCDlight therethrough negative pressure hole 4 arrive receiving end 11, the light quantity that receiving end 11 receives is FS
aBCD.The light signal of reception is converted into voltage signal and exports by receiving end 11, and voltage signal size is directly proportional to the light quantity of reception, and scale-up factor is G, then the reference voltage level V=GFS of now correlation photoelectric detector output
aBCD.
As shown in figure 11, the negative pressure hole 4 that blocking occurs moves to the transmitting terminal 10 of correlation photoelectric detector and the center of receiving end 11, and the area of blocking is S
aBD, do not have the area blocked to be S
bCD.Area is then now had to be S
bCDlight therethrough negative pressure hole 4 and receiving end 11 receive, the light quantity of light is FS
bCDso, the detection magnitude of voltage v=GFS that correlation photoelectric detector exports
bCD.
The above analysis, can obtain following system of equations:
The plugging rate H of definition drum negative pressure hole is: the blocked area S of negative pressure hole
aBDbe S with unplugged area
aBCDratio, i.e. H=S
aBD/ S
aBCD.
So obtaining drum negative pressure hole plugging rate H is:
Wherein: v is when drum negative pressure hole is positioned at the center of the transmitting terminal of correlation photoelectric detector and receiving end, and the voltage signal values that correlation photoelectric detector exports, namely detects magnitude of voltage; V is when drum negative pressure hole does not block and is positioned at the center of the transmitting terminal of correlation photoelectric detector and receiving end, the voltage signal size that correlation photoelectric detector exports, i.e. reference voltage level.
In this instructions, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, same or analogous part cross-reference between each embodiment.For system embodiment, because itself and embodiment of the method are substantially corresponding, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Figure 12 is the block diagram of a detection system embodiment of drum negative pressure hole plugging rate of the present invention.As shown in figure 12, this system comprises correlation photoelectric detector 1201 and controller 1202, wherein:
Correlation photoelectric detector 1201, for the output detections magnitude of voltage when the negative pressure hole with rotating drum moves to correlation photoelectric detector to controller 1202;
Controller 1202, such as programmable logic controller (PLC) PLC, for obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports; According to the plugging rate detecting magnitude of voltage and reference voltage level determination negative pressure hole.
Preferably, the transmitting terminal of correlation photoelectric detector and receiving end are arranged on the straight line at radial place of drum, and one of them is arranged on Nei Gushang, and another is arranged on the outside of external drum.More preferably, the sectional area of ray regions that transmitting terminal sends is not less than the area of negative pressure hole.
Concrete testing process can the description of reference method embodiment, does not repeat them here.
The present embodiment utilizes correlation photoelectric detector to obtain the detection magnitude of voltage of negative pressure hole in real work and the reference voltage level of negative pressure hole in unplugged situation; controller can realize effective detection of negative pressure hole plugging rate according to detection magnitude of voltage and reference voltage level; for the maintenance of operating personnel to drum provides accurate reference frame; reduce the incidence of the stopping accident that the blocking due to negative pressure hole causes, improve production efficiency and the quality of production of cigarette.
In one embodiment, controller 1202 is according to the plugging rate of following formulae discovery negative pressure hole:
H＝1-v/V
Wherein, H represents the plugging rate of negative pressure hole, v represents the negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
In one embodiment, see Figure 12, detection system can also comprise: absolute value shaft encoder 1203, is arranged on the gear train of drum, for the outgoing position signal when this negative pressure hole moves to correlation photoelectric detector 1201 in unplugged situation to controller 1202; Rotating drum one week, absolute value shaft encoder 1203 evenly exports the position signalling identical with negative pressure hole quantity.Correspondingly, controller 1203 in this embodiment, before obtaining the reference voltage level that when negative pressure hole moves to correlation photoelectric detector 1201 in unplugged situation, correlation photoelectric detector 1201 exports, also for determining that when detecting that absolute value shaft encoder 1203 exports described position signalling this negative pressure hole moves to correlation photoelectric detector 1201.
In one embodiment, see Figure 12, controller 1202, also for sending to display 1204 to show the plugging rate of negative pressure hole; Correspondingly, detection system can also comprise: display 1204, for showing the plugging rate of negative pressure hole.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (12)
1. a detection method for drum negative pressure hole plugging rate, comprising:
Determine the negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector with rotating drum;
Obtain the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports;
The plugging rate of described negative pressure hole is determined according to described detection magnitude of voltage and described reference voltage level.
2. method according to claim 1, is characterized in that, before obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports, also comprises:
Obtain the position signalling that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, absolute value shaft encoder exports;
When detecting that absolute value shaft encoder exports described position signalling, determine that described negative pressure hole moves to correlation photoelectric detector;
Wherein, described absolute value shaft encoder is arranged on the gear train of drum, rotating drum one week, the even outgoing position signal of described absolute value shaft encoder.
3. method according to claim 1 and 2, is characterized in that, the plugging rate of negative pressure hole according to following formulae discovery:
H＝1-v/V
Wherein, H represents the plugging rate of described negative pressure hole, v represents the described negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
4. method according to claim 1, is characterized in that, transmitting terminal and the receiving end of described correlation photoelectric detector are arranged on the straight line at radial place of described drum, and one of them is arranged on Nei Gushang, and another is arranged on the outside of external drum.
5. method according to claim 4, is characterized in that,
The sectional area of the ray regions that described transmitting terminal sends is not less than the area of described negative pressure hole.
6. method according to claim 1, is characterized in that, also comprises:
Display is sent to show the plugging rate of described negative pressure hole.
7. a detection system for drum negative pressure hole plugging rate, comprising:
Correlation photoelectric detector, for the output detections magnitude of voltage when the negative pressure hole with rotating drum moves to correlation photoelectric detector to controller;
Controller, for obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports; The plugging rate of described negative pressure hole is determined according to described detection magnitude of voltage and described reference voltage level.
8. system according to claim 7, is characterized in that, also comprises:
Absolute value shaft encoder, is arranged on the gear train of drum, for the outgoing position signal when described negative pressure hole moves to correlation photoelectric detector in unplugged situation to controller; Rotating drum one week, described absolute value shaft encoder evenly exports the position signalling identical with negative pressure hole quantity;
Described controller, before obtaining the reference voltage level that when described negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports, also for determining that described negative pressure hole moves to correlation photoelectric detector when detecting that described absolute value shaft encoder exports described position signalling.
9. the system according to claim 7 or 8, is characterized in that, the plugging rate of described controller negative pressure hole according to following formulae discovery:
H＝1-v/V
Wherein, H represents the plugging rate of described negative pressure hole, v represents the described negative pressure hole detection magnitude of voltage that correlation photoelectric detector exports when moving to correlation photoelectric detector, the reference voltage level that when V represents that negative pressure hole moves to correlation photoelectric detector in unplugged situation, correlation photoelectric detector exports.
10. system according to claim 7, is characterized in that, transmitting terminal and the receiving end of described correlation photoelectric detector are arranged on the straight line at radial place of described drum, and one of them is arranged on Nei Gushang, and another is arranged on the outside of external drum.
11. systems according to claim 10, is characterized in that,
The sectional area of the ray regions that described transmitting terminal sends is not less than the area of described negative pressure hole.
12. systems according to claim 7, is characterized in that,
Described controller, also for sending to display to show the plugging rate of described negative pressure hole;
Described system also comprises:
Display, for showing the plugging rate of described negative pressure hole.
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| CN106395386A (en) * | 2016-09-09 | 2017-02-15 | 龙岩烟草工业有限责任公司 | Detection method and detection device for blocking detector of tobacco shred feeding machine |
| CN110411856A (en) * | 2019-08-26 | 2019-11-05 | 联德精密材料（中国）股份有限公司 | A kind of horn button detection device |
| CN113686369A (en) * | 2021-08-27 | 2021-11-23 | 明峰医疗系统股份有限公司 | Identification and positioning system for coding ring hole site blockage of CT frame encoder |
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