CN113959382B - Method for detecting nose bridge strip of disposable mask - Google Patents
Method for detecting nose bridge strip of disposable mask Download PDFInfo
- Publication number
- CN113959382B CN113959382B CN202111018560.6A CN202111018560A CN113959382B CN 113959382 B CN113959382 B CN 113959382B CN 202111018560 A CN202111018560 A CN 202111018560A CN 113959382 B CN113959382 B CN 113959382B
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- China
- Prior art keywords
- nose bridge
- proximity sensor
- bridge strip
- mask
- body machine
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
Abstract
The invention discloses a method for detecting a nose bridge strip of a disposable mask, which comprises the following steps: determining the detection range and the detection distance of the proximity sensor according to the length of a mask piece of the disposable mask, the length of a nose bridge strip and the width between two corresponding pressing lines of the nose bridge strip; the proximity sensor is arranged on the side wall of the body machine corresponding to the two adjacent press rolls; starting the body machine to produce the disposable mask, so that the mask sheet moves along the transmission direction of the body machine; the proximity sensor detects the nose bridge strip and transmits a detection signal to the PLC, the PLC counts the continuous time of the detection signal as d1, and the interruption time of the detection signal as d2; comparing the timing time d1 with the theoretical time s1 with the detection signal and the timing time d2 with the theoretical time s2 without the detection signal through the PLC; if d1=s1, d2 is cleared, and the next piece is produced and detected; if d1 is less than s1, judging that the nose bridge strip is placed and deviated, and alarming and stopping the body machine; if d1=0 and d2=s1+s2, judging that no nose bridge strip exists in the mask sheet, and alarming and stopping the device.
Description
Technical Field
The invention relates to the technical field of plane mask machines, in particular to a method for detecting nose bridge strips of a disposable mask.
Background
The nose bridge strip of the qualified disposable mask must be well placed at the middle position of the two pressing lines at the upper part of the mask sheet, if the nose bridge strip is not arranged and/or deviates from the middle position of the two pressing lines, the nose bridge strip is not qualified disposable mask, and the effect of fully isolating viruses and bacteria can not be achieved in use. However, part of the mask machines on the market at present are not provided with a device and a function for detecting the nose bridge strip, and only manual detection is needed, so that time and labor are wasted; the other part can only detect whether the nose bridge strip supply end supplies or not, and the method is to judge that the disposable mask has the nose bridge strip by detecting whether the disc bearing the nose bridge strip rotates or not, and judge that the disposable mask does not have the nose bridge strip if the disc does not rotate. In this method, although whether the nose bridge piece is supplied can be determined, whether the nose bridge piece is supplied in place cannot be known, so that it is not more accurate and important to detect the supply end of the nose bridge piece than to directly detect whether the nose bridge piece on the disposable mask sheet at the end of the mask machine is supplied in place.
Disclosure of Invention
In view of the above, the invention provides a method for detecting the nose bridge strip of the disposable mask, which can directly and effectively detect whether the nose bridge strip of the disposable mask exists or not and whether the nose bridge strip is positioned between two pressing lines at the upper end of a mask sheet.
The technical scheme of the invention is as follows: a method of detecting a nose bridge strip of a disposable mask comprising the steps of:
step one: determining the detection range and the detection distance of the proximity sensor according to the length of a mask piece of the disposable mask, the length of a nose bridge strip and the width between two corresponding pressing lines of the nose bridge strip;
the detection range is the width between two pressing lines corresponding to the nose bridge strip placement position on the mask sheet; the detection distance is the vertical distance between the detection end face of the proximity sensor and the mask sheet;
step two: installing a proximity sensor on the side wall of the main body machine corresponding to the two adjacent press rolls according to the detection range and the detection distance determined in the first step;
step three: starting the body machine to produce the disposable mask, so that the mask sheet moves along the transmission direction of the body machine; wherein, the longitudinal direction of the mask sheet is parallel to the transmission direction of the body machine;
step four: the proximity sensor detects the nose bridge strip and transmits a detection signal to the PLC, the PLC counts the continuous time of the detection signal as d1, and the interruption time of the detection signal as d2;
step five: comparing the timing time d1 with the theoretical time s1 with the detection signal and the timing time d2 with the theoretical time s2 without the detection signal through the PLC;
step six: if d1=s1, d2 is cleared, production is continued, the proximity sensor continues to detect the next mask sheet, and the step four is returned;
step seven: if d1 is less than s1, judging that the nose bridge strip is placed and deviated, automatically alarming and stopping the body machine, and turning to a step nine;
step eight: if d1=0 and d2=s1+s2, judging that no nose bridge strip exists in the mask sheet, automatically alarming and stopping the equipment, and turning to a step nine;
step nine: after the equipment is stopped, the timing time d1 and d2 in the PLC are automatically zeroed, and the equipment is manually checked and maintained, and then the step three is returned.
Preferably, the detection distance of the proximity sensor is 2mm-6mm.
Preferably, the proximity sensor is mounted on a side wall of the body machine by an L-shaped fixing bracket.
Preferably, the horizontal section of the fixing support is provided with a proximity sensor mounting hole, and the proximity sensor mounting hole is a strip-shaped hole for adjusting the detection range of the proximity sensor.
Preferably, the vertical section of the fixing bracket is provided with a fixing screw hole, and the fixing screw hole is a bar hole for adjusting the detection distance of the proximity sensor.
Preferably, two adjacent press rollers corresponding to the proximity sensor are positioned in the middle of the transmission direction of the body machine.
The beneficial effects are that:
1. the method can directly and effectively detect whether the disposable mask has the nose bridge strip or not and whether the nose bridge strip is positioned between the two pressing lines at the upper end of the mask sheet, has low cost, and can effectively prevent waste of production materials of the mask sheet.
2. The invention controls the detection distance of the proximity sensor within the set range, and can ensure that the proximity sensor accurately detects the existence of the nose bridge strip and the position of the nose bridge strip in the mask sheet.
3. The proximity sensor is installed through the fixed support, so that the detection range and the detection distance of the proximity sensor can be adjusted at will.
4. The specific design of the longitudinal position of the proximity sensor on the body machine avoids the proximity sensor being positioned at the inlet of the body machine, and effectively ensures that the proximity sensor can detect the nose bridge strip in the mask sheet which is stably driven.
Drawings
Fig. 1 is a schematic view of a part of the structure of a body machine.
Fig. 2 is a fixed bracket of the proximity sensor of the present invention.
Wherein, 1-compression roller, 2-set screw hole, 3-proximity sensor mounting hole.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
The embodiment provides a method for detecting a nose bridge strip of a disposable mask, which can directly and effectively detect whether the nose bridge strip of the disposable mask exists or not and whether the nose bridge strip is positioned between two pressing lines at the upper end of a mask sheet.
Because the bridge strip allows the set distance of the longitudinal offset between the two pressing lines on the mask sheet, the method of the embodiment only detects whether the bridge strip exists on the mask sheet and detects whether the bridge strip is positioned between the two pressing lines at the upper end of the mask sheet, and the method comprises the following steps:
step one: determining the detection range and the detection distance of the proximity sensor according to the length of a mask piece of the disposable mask, the length of a nose bridge strip and the width between two corresponding pressing lines of the nose bridge strip, and then determining the model and the installation size of the proximity sensor;
the proximity sensor only detects metal objects and does not sense other objects made of other materials, so that the proximity sensor can shield non-woven fabrics and melt-blown cloth which form a mask sheet and the interference of plastic materials on the nose bridge strip, and only detects metal wires in the nose bridge strip;
the detection range of the proximity sensor is the width between two pressing lines corresponding to the placing position of the nose bridge strip on the mask sheet, and the nose bridge strip cannot be detected by the proximity sensor beyond the width;
the detection distance of the proximity sensor is the vertical distance between the detection end face of the proximity sensor and the mask sheet, and the nose bridge strip cannot be detected by the proximity sensor beyond the vertical distance;
step two: as shown in fig. 1, the proximity sensor is installed on the side wall of a main body machine (namely equipment for manufacturing mask sheets) corresponding to two adjacent press rollers 1, so that the detection end face of the proximity sensor is right above a detection range determined by two pressing lines corresponding to nose bridge strips of the mask sheets, and the upper and lower positions of the proximity sensor are adjusted to be the distance between the detection end face and the upper side of the mask sheets within a set range (preferably between 2mm and 6 mm);
step three: starting the body machine to produce the disposable mask, so that the mask sheet moves along the transmission direction of the body machine; wherein, the longitudinal direction of the mask sheet is parallel to the transmission direction of the body machine;
step four: the proximity sensor detects the nose bridge strip and transmits a signal to a PLC (external controller), meanwhile, the PLC counts the continuous time of the signal as d1, the distance between the nose bridge strips in two adjacent mask sheets is a set value, and the time for detecting signal interruption is d2; wherein, adjacent mask sheets are continuous;
step five: comparing the timing time d1 with the theoretical time s1 and the timing time d2 with the theoretical time s2 by the PLC;
wherein, the total length of the mask sheet in the longitudinal direction is L, the length of the nose bridge strip is L1, the length of the part without the nose bridge strip is L2, and the transmission speed of the mask sheet is v, the theoretical time s1=L1/v, the theoretical time s2=L2/v, and s1+s2=L/v;
step six: if d1=s1, d2 is cleared, production is continued, the proximity sensor continues to detect the next mask sheet, and the step four is returned;
step seven: if d1 is less than s1, judging that the nose bridge strip is placed and deviated, automatically alarming and stopping the body machine, and turning to a step nine;
step eight: if d1=0 and d2=s1+s2, judging that no nose bridge strip exists in the mask sheet, automatically alarming and stopping the equipment, and turning to a step nine;
step nine: after the equipment is stopped, the timing time d1 and d2 in the PLC are automatically reset, and the equipment is manually checked and maintained, so that the waste of non-woven fabrics and melt-blown fabrics is reduced, and the equipment returns to the step three after the manual check.
In this embodiment, a fixing bracket is manufactured according to the installation size of the proximity sensor, as shown in fig. 2, the fixing bracket is an L-shaped fixing plate, and a horizontal section and a vertical section of the fixing bracket are respectively provided with a proximity sensor installation hole 3 and a fixing screw hole 2, a screw passes through the fixing screw hole 2 to fix the vertical section of the fixing bracket on the side wall of the body machine corresponding to any two adjacent press rolls 1, and the proximity sensor is installed in the proximity sensor installation hole 3, so that the proximity sensor is installed on the horizontal section of the fixing bracket; wherein, the proximity sensor mounting hole 3 and the set screw hole 2 are bar-shaped holes so as to correspondingly adjust the detection range and the detection distance of the proximity sensor.
In this embodiment, two adjacent compression rollers 1 corresponding to the proximity sensor are preferably located in the middle of the transmission direction of the body machine, so that the proximity sensor is prevented from being located at the inlet of the body machine, and therefore the proximity sensor can conveniently detect the nose bridge strip in the mask sheet which is stably transmitted.
In this embodiment, the running speed v of the body machine is controlled by a frequency converter, and the frequency converter can transmit the real-time running speed v to the PLC through the communication port.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method of detecting a nose bridge strip of a disposable mask comprising the steps of:
step one: determining the detection range and the detection distance of the proximity sensor according to the length of a mask piece of the disposable mask, the length of a nose bridge strip and the width between two corresponding pressing lines of the nose bridge strip;
the detection range is the width between two pressing lines corresponding to the nose bridge strip placement position on the mask sheet; the detection distance is the vertical distance between the detection end face of the proximity sensor and the mask sheet;
step two: installing a proximity sensor on the side wall of the body machine corresponding to the two adjacent press rolls (1) according to the detection range and the detection distance determined in the first step;
step three: starting the body machine to produce the disposable mask, so that the mask sheet moves along the transmission direction of the body machine; wherein, the longitudinal direction of the mask sheet is parallel to the transmission direction of the body machine;
step four: the proximity sensor detects the nose bridge strip and transmits a detection signal to the PLC, the PLC counts the continuous time of the detection signal as d1, and the interruption time of the detection signal as d2;
step five: comparing the timing time d1 with the theoretical time s1 with the detection signal and the timing time d2 with the theoretical time s2 without the detection signal through the PLC;
step six: if d1=s1, d2 is cleared, production is continued, the proximity sensor continues to detect the next mask sheet, and the step four is returned;
step seven: if d1 is less than s1, judging that the nose bridge strip is placed and deviated, automatically alarming and stopping the body machine, and turning to a step nine;
step eight: if d1=0 and d2=s1+s2, judging that no nose bridge strip exists in the mask sheet, automatically alarming and stopping the equipment, and turning to a step nine;
step nine: after the equipment is stopped, the timing time d1 and d2 in the PLC are automatically zeroed, and the equipment is manually checked and maintained, and then the step three is returned.
2. The method of detecting a nose bridge of a disposable mask of claim 1, wherein the proximity sensor detects a distance of 2mm to 6mm.
3. The method of detecting a nose bridge of a disposable mask according to claim 1 or 2, wherein the proximity sensor is mounted to a side wall of the body machine by an L-shaped mounting bracket.
4. A method for detecting a nose bridge strip of a disposable mask according to claim 3, wherein the horizontal section of the fixing bracket is provided with a proximity sensor mounting hole (3), and the proximity sensor mounting hole (3) is a bar-shaped hole for adjusting the detection range of the proximity sensor.
5. The method for detecting a nose bridge of a disposable mask according to claim 4, wherein the vertical section of the fixing bracket is provided with a fixing screw hole (2), and the fixing screw hole (2) is a bar-shaped hole for adjusting a detection distance of the proximity sensor.
6. A method of detecting a nose bridge of a disposable mask according to claim 3, wherein the vertical section of the fixing support is provided with a set screw hole (2), and the set screw hole (2) is a bar-shaped hole for adjusting the detection distance of the proximity sensor.
7. The method for detecting the nose bridge strip of the disposable mask according to any one of claims 1 to 2 and 4 to 6, wherein two adjacent press rollers (1) corresponding to the proximity sensor are positioned at the middle part of the transmission direction of the body machine.
8. A method for detecting a nose bridge strip of a disposable mask according to claim 3, wherein two adjacent press rolls (1) corresponding to the proximity sensor are positioned at the middle part of the transmission direction of the body machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018560.6A CN113959382B (en) | 2021-09-01 | 2021-09-01 | Method for detecting nose bridge strip of disposable mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018560.6A CN113959382B (en) | 2021-09-01 | 2021-09-01 | Method for detecting nose bridge strip of disposable mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113959382A CN113959382A (en) | 2022-01-21 |
| CN113959382B true CN113959382B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111018560.6A Active CN113959382B (en) | 2021-09-01 | 2021-09-01 | Method for detecting nose bridge strip of disposable mask |
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| Country | Link |
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| CN (1) | CN113959382B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003214840A (en) * | 2002-01-24 | 2003-07-30 | Aomori Prefecture | Device for measuring body length of squid |
| CN109974613A (en) * | 2018-12-12 | 2019-07-05 | 弓立（厦门）医疗用品有限公司 | A kind of mask fully-automatic production detection device |
| CN210375022U (en) * | 2018-12-12 | 2020-04-21 | 弓立（厦门）医疗用品有限公司 | Full-automatic production detection equipment for masks |
| CN111302008A (en) * | 2020-03-26 | 2020-06-19 | 上海拔山自动化技术有限公司 | Full-automatic mask production line |
| CN212292341U (en) * | 2020-05-29 | 2021-01-05 | 广州白云蓝天电子科技有限公司 | Gauze mask machine, bridge of the nose line transfer chain and tensioning alarm mechanism thereof |
| CN212652611U (en) * | 2020-07-13 | 2021-03-05 | 廊坊中凤机械科技有限公司 | Shearing and conveying device for nose bridge strip of mask |
| CN212902958U (en) * | 2020-09-30 | 2021-04-06 | 重庆鸽牌电线电缆有限公司 | Gauze mask nasal splint line detection device |
-
2021
- 2021-09-01 CN CN202111018560.6A patent/CN113959382B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003214840A (en) * | 2002-01-24 | 2003-07-30 | Aomori Prefecture | Device for measuring body length of squid |
| CN109974613A (en) * | 2018-12-12 | 2019-07-05 | 弓立（厦门）医疗用品有限公司 | A kind of mask fully-automatic production detection device |
| CN210375022U (en) * | 2018-12-12 | 2020-04-21 | 弓立（厦门）医疗用品有限公司 | Full-automatic production detection equipment for masks |
| CN111302008A (en) * | 2020-03-26 | 2020-06-19 | 上海拔山自动化技术有限公司 | Full-automatic mask production line |
| CN212292341U (en) * | 2020-05-29 | 2021-01-05 | 广州白云蓝天电子科技有限公司 | Gauze mask machine, bridge of the nose line transfer chain and tensioning alarm mechanism thereof |
| CN212652611U (en) * | 2020-07-13 | 2021-03-05 | 廊坊中凤机械科技有限公司 | Shearing and conveying device for nose bridge strip of mask |
| CN212902958U (en) * | 2020-09-30 | 2021-04-06 | 重庆鸽牌电线电缆有限公司 | Gauze mask nasal splint line detection device |
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| CN113959382A (en) | 2022-01-21 |
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