CN109853163B - Dirt detection method based on excess line detection technology - Google Patents
Dirt detection method based on excess line detection technology Download PDFInfo
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- CN109853163B CN109853163B CN201910060113.3A CN201910060113A CN109853163B CN 109853163 B CN109853163 B CN 109853163B CN 201910060113 A CN201910060113 A CN 201910060113A CN 109853163 B CN109853163 B CN 109853163B
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Abstract
The invention provides a dirt detection method based on a remaining line detection technology, which comprises the following steps: a surplus thread alarm threshold B, a dirt detection alarm threshold D and preset turns X are preset in an electric control module of the sewing machine; in the operation process of the sewing machine, when the real-time detection signal Y is smaller than the surplus thread alarm threshold B, the electronic control module judges that the surplus of the bottom thread is enough and controls the sewing machine to continuously operate; when the real-time detection signal Y is larger than or equal to the surplus line alarm threshold B, the electronic control module records the number of turns of the rotating shuttle peg; after the shuttle peg rotates for a preset number of turns X, if the real-time detection signal Y is larger than or equal to the dirt detection alarm threshold D, the electronic control module controls the alarm module to send out an alarm for replacing the shuttle peg; and if the real-time detection signal Y is smaller than the dirt detection alarm threshold value D, the electronic control module controls the alarm module to send out bobbin replacement alarm and dirt cleaning alarm. The method and the device can effectively detect whether the dirt near the rotating shuttle is in an allowable range while realizing the bottom line allowance detection.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to a sewage detection method based on a remaining line detection technology.
Background
At present, the length of the bottom thread wound on the bobbin in the rotating shuttle is limited, and meanwhile, in order to avoid forming a section of hollow without stitches on a sewing material because the bobbin is not replaced in time due to the fact that the bottom thread is used up, a remaining thread detection device is usually arranged in a sewing machine and used for monitoring the remaining amount of the bottom thread wound on the bobbin in the rotating shuttle of the sewing machine in real time, for example, the bottom thread monitoring device for the sewing machine disclosed in the Chinese patent application with the application number of 201310278156.1. In general, as shown in fig. 1, the bobbin thread remaining amount detecting apparatus for a sewing machine includes an electronic control module 100 of the sewing machine, a light reflecting portion 300 (which may be reflective paper) fixed to an outer circumferential surface of a winding post of a bobbin 200 and made of a light reflecting material, a first through hole 201 opened in a flange of the bobbin 200, a second through hole 401 opened in a bobbin case 400, and a detecting sensor (e.g., a photo sensor 500) having a transmitter and a receiver, the bobbin 200 and the bobbin case 400 are installed in a rotary hook 600 of the sewing machine, and the photo sensor 500 is connected to the electronic control module 100. The working principle of the sewing machine bottom thread allowance detection device is as follows: light emitted by an emitter of the photoelectric sensor 500 sequentially passes through the second through hole 401 and the first through hole 201 and then irradiates the winding post part of the bobbin 200; when the bobbin thread margin on the winding post of the bobbin 200 is sufficient, the light reflecting portion 300 is covered by the bobbin thread and is not exposed, and the light is irradiated on the bobbin thread and is not reflected, so that the receiver of the photoelectric sensor 500 cannot receive the light signal or receives a very weak light signal, and at this time, the electronic control module 100 judges that the bobbin thread margin is sufficient; when the margin of the bobbin thread on the winding post of the bobbin 200 is not enough, the reflective portion 300 is exposed, the light emitted by the emitter of the photoelectric sensor 500 irradiates the reflective portion 300 to be reflected, and the reflected light is reflected along the path of the incident light, so that the receiver of the photoelectric sensor 500 receives the light signal with stronger intensity, and at the moment, the electronic control module 100 judges that the margin of the bobbin thread is not enough, and controls some rows such as alarming and stopping.
In the sewing machine bottom thread allowance detection device with the structure, the electric control module can automatically identify whether the bottom thread allowance in the rotating shuttle is enough or not according to the feedback signal of the photoelectric sensor. However, when thread fluff, oil mist and other dirt accumulate at the bottom of the sewing machine, the dirt accumulates near the rotating shuttle, and the dirt blocks the transmission and reception of the optical signal of the photoelectric sensor, so that the detection of the photoelectric sensor is interfered, and the accuracy and reliability of the bottom thread allowance detection are affected.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a contamination detection method based on a residual thread detection technique, which can effectively detect the presence of contamination while detecting a residual bobbin thread amount by a bobbin thread amount detection device of a sewing machine.
In order to achieve the above object, the present invention provides a dirt detecting method based on a remaining line detecting technology, comprising the steps of:
1) a surplus thread alarm threshold B, a dirt detection alarm threshold D and a preset number of turns X are preset in an electric control module of the sewing machine; the surplus thread alarm threshold B and the dirt detection alarm threshold D are both used for representing the light intensity of light received by a detection sensor in the bobbin thread surplus detection device of the sewing machine, and the surplus thread alarm threshold B is smaller than the dirt detection alarm threshold D;
2) and in the operation process of the sewing machine, the electric control module receives the real-time detection signal Y output by the detection sensor and makes the following judgment according to the magnitude of the real-time detection signal Y:
A. when the real-time detection signal Y is smaller than the surplus thread alarm threshold B, the electronic control module judges that the surplus of the bottom thread is enough and controls the sewing machine to continue to operate;
B. when the real-time detection signal Y is larger than or equal to the surplus line alarm threshold B, the electronic control module records the number of turns of the rotating shuttle peg;
when the bobbin rotates for a preset number of turns X, if the real-time detection signal Y is larger than or equal to the dirt detection alarm threshold D, the electronic control module judges that the bottom thread allowance is insufficient, and the electronic control module controls an alarm module in the sewing machine to send out a bobbin replacement alarm;
after the bobbin rotates for the preset number of turns X, if the real-time detection signal Y is smaller than the dirt detection alarm threshold D, the electronic control module judges that the residual quantity of the bottom thread is insufficient and the accumulated quantity of the dirt exceeds the allowable range, and the electronic control module controls an alarm module in the sewing machine to send out bobbin replacement alarm and dirt cleaning alarm.
Further, the detection sensor is a photoelectric sensor, the photoelectric sensor is provided with a light emitter and a light receiver, the light emitter and the light receiver are both aligned with a winding post of a bobbin in the sewing machine, and a light reflecting part is arranged on the surface of the winding post.
Further, the light reflecting part is made of light reflecting paper fixed on the surface of the winding post or light reflecting materials coated on the surface of the winding post.
Further, the alarm module comprises a voice alarm.
Further, the alarm module comprises a flashing icon arranged on the operation panel of the sewing machine.
As described above, the method for detecting contaminants based on the excess line detection technology according to the present invention has the following advantageous effects:
according to the method, an electric control module and a detection sensor in the existing sewing machine bottom thread allowance detection device are utilized, the electric control module makes a series of judgments after comparing a real-time detection signal Y output by the detection sensor with a bottom thread alarm threshold B and a dirt detection alarm threshold D, so that whether dirt near a rotating shuttle is in an allowable range can be effectively detected while bottom thread allowance detection is realized, and the precision and the reliability of bottom thread allowance detection are finally ensured; in particular, the hardware used in the application is the original hardware in the sewing machine, and the cost of any hardware is not required to be increased, and a sensor for measuring dirt is not required to be additionally arranged, so that the cost is low, and the method can be suitable for new and old sewing machines with a bottom line allowance detection function.
Drawings
FIG. 1 is a schematic view showing a structure of a device for detecting the remaining amount of a lower thread of a sewing machine in the prior art.
FIG. 2 is a schematic view of a soil detection method based on the excess line detection technology in the present application.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.
The application provides a method for detecting dirt based on a surplus thread detection technology, which is used in a sewing machine, wherein the sewing machine comprises a sewing machine bottom thread surplus detection device shown in figure 1, the sewing machine bottom thread surplus detection device is provided with a detection sensor connected with an electronic control module 100, the detection sensor preferably adopts a photoelectric sensor 500, the photoelectric sensor 500 is provided with a light emitter and a light receiver, the light emitter and the light receiver are both aligned with a winding post of a shuttle peg 200 in the sewing machine, and the surface of the winding post is provided with a reflecting part 300; the reflective portion 300 is reflective paper fixed on the surface of the winding post or reflective material coated on the surface of the winding post. Preferably, the electronic control module 100 comprises a sewing machine controller and a detection controller in the device for detecting the residual quantity of the bottom thread of the sewing machine, the photoelectric sensor 500 is connected with the detection controller, the detection controller is connected with the sewing machine controller, and the sewing machine controller is also connected with a main motor and an alarm module in the sewing machine. In the method for detecting the dirt based on the remaining thread detection technology, the detection controller judges whether the remaining amount of the bottom thread on the bobbin 200 is enough and whether the dirt near the rotating shuttle exceeds the allowable range according to the real-time signal output by the photoelectric sensor 500, and the sewing machine controller correspondingly controls the current state of the sewing machine according to the judgment result of the detection controller.
Further, as shown in fig. 2, a curve S1 in fig. 2 represents a relationship between the intensity of a signal output from the photosensor 500 and the exposed area of the light reflecting portion 300 on the bobbin 200 when the contamination (including lint, oil contamination, etc.) measured by the proximity-to-rotary-hook-affecting photosensor 500 is within the allowable range, and a curve S2 in fig. 2 represents a relationship between the intensity of a signal output from the photosensor 500 and the exposed area of the light reflecting portion 300 on the bobbin 200 when the contamination (including lint, oil contamination, etc.) measured by the proximity-to-rotary-hook-affecting photosensor 500 is out of the allowable range. Specifically, when the bobbin thread wound around the bobbin 200 is sufficient in the operation of the sewing machine, the bobbin thread covers the reflective portion 300 completely, and the reflective portion 300 is not exposed, so that when the optical signal emitted by the optical transmitter in the photoelectric sensor 500 irradiates the bobbin thread, the surface of the bobbin 200, the surface of the rotating shuttle, or other positions, the optical receiver in the photoelectric sensor 500 receives a weak signal, so that the real-time detection signal Y output by the photoelectric sensor 500 is small and is smaller than the following remaining thread alarm threshold B. With the continuous consumption of the bottom line, the reflective portion 300 is gradually exposed, the more the bottom line is consumed and the less the margin is, the more the reflective portion 300 is exposed, and due to the back reflection characteristic of the reflective portion 300 to the incident light, the signal received by the light receiver in the photoelectric sensor 500 is gradually enhanced, that is, the real-time detection signal Y output by the photoelectric sensor 500 is gradually increased; after the light reflecting portion 300 is exposed, the real-time detection signal Y output by the photoelectric sensor 500 is greater than the remaining line alarm threshold B. If the photosensor 500 measures more dirt on the optical path, it will cause the overall sensitivity of the photosensor 500 to decrease, i.e., the amount of dirt accumulated near the rotating shuttle is inversely proportional to the magnitude of the output signal of the photosensor 500. Based on this, the detection controller detects the bottom line allowance according to the magnitude of the output signal of the photoelectric sensor 500 and detects whether the accumulation amount of the dirt exceeds the allowable range, when the detection controller judges that only the bottom line allowance is insufficient according to the magnitude of the output signal of the photoelectric sensor 500 or judges that the bottom line allowance is insufficient and the accumulation amount of the dirt exceeds the allowable range, the sewing machine controller triggers an alarm module in the sewing machine to give a corresponding alarm, so that the precision and the reliability of the detection of the bottom line allowance of the sewing machine are ensured, an operator of the sewing machine can be timely reminded to clean the accumulated dirt or trigger the automatic maintenance function of the sewing machine, and the overall performance of the sewing machine is finally improved.
Therefore, the dirt detection method based on the excess line detection technology comprises the following steps:
step 1), a surplus line alarm threshold B, a dirt detection alarm threshold D and preset turns X are preset in a detection controller; the remaining thread alarm threshold B and the contamination detection alarm threshold D are both used to indicate the light intensity of the light received by the light receiver in the photosensor 500 in the sewing machine bottom thread remaining amount detecting device, and the remaining thread alarm threshold B < the contamination detection alarm threshold D.
Step 2), in the operation process of the sewing machine, the photoelectric sensor 500 outputs a real-time detection signal Y, and the real-time detection signal Y reflects the light intensity of the light ray received by the light ray receiver in the photoelectric sensor 500; the detection controller receives the real-time detection signal Y output by the photosensor 500 and makes the following determination according to the magnitude of the real-time detection signal Y:
the method includes the steps that A, when a real-time detection signal Y is smaller than a residual thread alarm threshold value B, for example, the real-time detection signal Y is the value A in fig. 2, at the moment, no matter whether the accumulated amount of dirt is within an allowable range or exceeds the allowable range, a light reflecting portion 300 on a winding column of a shuttle peg 200 is not exposed and is completely covered by a bottom thread, the residual amount of the bottom thread is large, a detection controller judges that the residual amount of the bottom thread is enough, a sewing machine controller controls the sewing machine to continue to operate, the sewing machine controller does not judge whether the accumulated amount of the dirt exceeds the allowable range, and the sewing machine controller does not trigger an alarm module in the sewing machine.
In case B, as the bobbin thread is continuously consumed, the light reflection portion 300 starts to be exposed, and when the real-time detection signal Y received by the detection controller and outputted by the photoelectric sensor 500 exceeds the remaining thread alarm threshold B, that is, when the real-time detection signal Y is not less than the remaining thread alarm threshold B, the detection controller starts to record the number of turns of the bobbin 200. When the accumulation amount of the dirt is within the allowable range, after the shuttle peg 200 rotates for the preset number of turns X, the real-time detection signal Y is gradually increased from the value B on the curve S1 in fig. 2 to the value E, and the value E is larger than the value D, namely the real-time detection signal Y output by the photoelectric sensor 500 is received by the detection controller after the shuttle peg 200 rotates for the preset number of turns X and is not smaller than the dirt detection alarm threshold value D, at the moment, the detection controller judges that the margin of the bottom thread is insufficient, the sewing machine controller controls an alarm module in the sewing machine to only send out a shuttle peg replacement alarm to remind an operator to replace the shuttle peg, and the sewing machine controller can also control the sewing machine to stop immediately or control the sewing machine to continue to operate for the preset number of needles and. When the accumulated amount of the dirt exceeds the allowable range, after the bobbin 200 rotates by the preset number of turns X, the real-time detection signal Y is gradually increased from the value B on the curve S2 in fig. 2 to the value C, and the value C is smaller than the value D, that is, after the bobbin 200 rotates by the preset number of turns X, the detection controller receives the real-time detection signal Y output by the photoelectric sensor 500 to be smaller than the dirt detection alarm threshold value D, at this time, the detection controller judges that the margin of the bobbin is insufficient and the accumulated amount of the dirt exceeds the allowable range, the sewing machine controller controls the alarm module in the sewing machine to send out a bobbin replacement alarm and a dirt cleaning alarm to remind an operator to replace the bobbin and clean the dirt, and the sewing machine controller further controls the sewing machine to stop immediately or controls the sewing machine to continue to operate by the preset number of needles and then stops, or the sewing machine controller triggers a maintenance program of the sewing machine.
Preferably, the alarm module comprises a voice alarm and a flashing icon arranged on an operation panel of the sewing machine, the voice alarm can be used for replacing the bobbin for alarming in a voice alarm mode or simultaneously carrying out bobbin replacing alarming and dirt cleaning alarming, and the flashing icon can be used for replacing the bobbin for alarming in a chart flashing mode or simultaneously carrying out bobbin replacing alarming and dirt cleaning alarming.
Further, in the above-mentioned dirt detecting method based on the excess line detection technology, the following two embodiments are adopted as the detection alarm mode:
embodiment one, a pulse encoding method; in the embodiment, when the detection controller judges that the bottom thread allowance is insufficient, the detection controller sends a short pulse signal to the sewing machine controller, and the sewing machine controller controls an alarm module in the sewing machine to only send out a shuttle peg replacement alarm; when the detection controller judges that the residual quantity of the bottom thread is insufficient and the accumulated quantity of the dirt exceeds the allowable range, the detection controller sends a long pulse signal to the sewing machine controller, and the sewing machine controller controls an alarm module in the sewing machine to send out bobbin replacement alarm and dirt cleaning alarm. The second embodiment is a data transmission mode; in the embodiment, the detection controller is connected with the sewing machine controller through an interface (such as a serial port), and data is transmitted between the detection controller and the sewing machine controller; the sewing machine controller can receive the judgment result of the detection controller and carry out corresponding control.
In summary, the stain detection method based on the excess line detection technology has the following advantages: 1. the method can realize real-time detection of the margin of the bottom line, and can also detect whether the accumulation amount of oil stains, line hair or other dirt influencing the detection precision of the photoelectric sensor 500 around the photoelectric sensor 500 is within an allowable range or not in real time, thereby improving the precision and reliability of the margin detection of the bottom line and simultaneously avoiding the loss of the service life of the sewing machine caused by long-term non-cleaning; 2. the used hardware is the original hardware in the sewing machine, the cost of any hardware does not need to be increased, a sensor for measuring dirt does not need to be additionally arranged, the use cost is low, and the method can be suitable for new and old sewing machines with the bottom line allowance detection function.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. A dirt detection method based on a remaining line detection technology is characterized by comprising the following steps: the method comprises the following steps:
1) a surplus thread alarm threshold B, a dirt detection alarm threshold D and a preset number of turns X are preset in an electric control module of the sewing machine; the surplus thread alarm threshold B and the dirt detection alarm threshold D are both used for representing the light intensity of light received by a detection sensor in the bobbin thread surplus detection device of the sewing machine, and the surplus thread alarm threshold B is smaller than the dirt detection alarm threshold D;
the detection sensor is a photoelectric sensor, the photoelectric sensor is provided with a light emitter and a light receiver, the light emitter and the light receiver are both aligned with a winding post of a bobbin in the sewing machine, and a light reflecting part is arranged on the surface of the winding post;
2) and in the operation process of the sewing machine, the electric control module receives the real-time detection signal Y output by the detection sensor and makes the following judgment according to the magnitude of the real-time detection signal Y:
A. when the real-time detection signal Y is smaller than the surplus thread alarm threshold B, the electronic control module judges that the surplus of the bottom thread is enough and controls the sewing machine to continue to operate;
B. when the real-time detection signal Y is larger than or equal to the surplus line alarm threshold B, the electronic control module records the number of turns of the rotating shuttle peg;
when the bobbin rotates for a preset number of turns X, if the real-time detection signal Y is larger than or equal to the dirt detection alarm threshold D, the electronic control module judges that the bottom thread allowance is insufficient, and the electronic control module controls an alarm module in the sewing machine to send out a bobbin replacement alarm;
after the bobbin rotates for the preset number of turns X, if the real-time detection signal Y is smaller than the dirt detection alarm threshold D, the electronic control module judges that the residual quantity of the bottom thread is insufficient and the accumulated quantity of the dirt exceeds the allowable range, and the electronic control module controls an alarm module in the sewing machine to send out bobbin replacement alarm and dirt cleaning alarm.
2. The method for detecting contaminants based on the excess line detection technique according to claim 1, wherein: the reflective part is reflective paper fixed on the surface of the winding post or reflective material coated on the surface of the winding post.
3. The method for detecting contaminants based on the excess line detection technique according to claim 1, wherein: the alarm module comprises a voice alarm.
4. The method for detecting contaminants based on the excess line detection technique according to claim 1, wherein: the alarm module comprises a flashing icon arranged on an operation panel of the sewing machine.
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| CN110565284A (en) * | 2019-09-20 | 2019-12-13 | 杰克缝纫机股份有限公司 | roller machine, bobbin winding allowance detection device and use method thereof |
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| CN208104727U (en) * | 2018-03-12 | 2018-11-16 | 杭州琦星机器人科技有限公司 | Bobbin thread detection device and sewing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ATE358202T1 (en) * | 2002-09-02 | 2007-04-15 | Gegauf Fritz Ag | METHOD FOR DETERMINING THE BOTTOM THREAD SUPPLY AND A SEWING MACHINE WITH A BOTTOM THREAD SUPPLY MONITORING |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188902A (en) * | 1979-05-18 | 1980-02-19 | The Singer Company | Bobbin thread run-out detectors |
| CN105486692A (en) * | 2014-10-07 | 2016-04-13 | 杜克普爱华股份公司 | Sensor assembly for a sewing machine |
| CN107653582A (en) * | 2017-09-21 | 2018-02-02 | 杰克缝纫机股份有限公司 | The detection structure of bottom line on a kind of sewing machine shuttle peg |
| CN207244168U (en) * | 2017-09-21 | 2018-04-17 | 杰克缝纫机股份有限公司 | A kind of peg or spindle and bobbin thread for sewing machine allowance detector |
| CN208104727U (en) * | 2018-03-12 | 2018-11-16 | 杭州琦星机器人科技有限公司 | Bobbin thread detection device and sewing machine |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |