CN110552123B - Cloth detection system, cloth detection method, computer-readable storage medium and electronic terminal - Google Patents
Cloth detection system, cloth detection method, computer-readable storage medium and electronic terminal Download PDFInfo
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- CN110552123B CN110552123B CN201810538794.5A CN201810538794A CN110552123B CN 110552123 B CN110552123 B CN 110552123B CN 201810538794 A CN201810538794 A CN 201810538794A CN 110552123 B CN110552123 B CN 110552123B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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Abstract
The invention provides a cloth detection system, a cloth detection method, a computer readable storage medium and an electronic terminal, which are applied to a sewing machine and comprise a light acquisition module, a signal processing module and a control module, wherein the light acquisition module acquires light intensity change caused by the shielding of cloth and converts the light intensity change into the change of an electric signal, the signal processing module processes the electric signal into a switching signal, the control module judges whether cloth exists or not, and if the cloth exists, an electromagnet (or an electromagnetic valve) is controlled to work. By adopting the technical scheme, whether the cloth exists can be efficiently and timely detected.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a cloth detection system, a cloth detection method, a computer readable storage medium and an electronic terminal.
Background
With the development of the machine manufacturing and electronic information industries, the sewing machine has developed towards intellectualization. Currently, there are two main ways of intelligent sewing as a whole: firstly, the method is realized by a mechanical structure; and secondly, the method is realized through an electronic sensor, and the sensor is mainly used for collecting signals of each terminal. The present cloth detection device of sewing machine is mainly realized by infrared correlation and proximity sensors and photoelectric sensors using optical fiber as transmission medium.
Infrared correlation has several major disadvantages: the installation is inconvenient, and the receiving and transmitting angles need to be adjusted to achieve the best effect; the launching tube is easy to wear, and the service life is influenced; the transmission is an analog signal which is easy to interfere and needs some extra circuits for processing; the installation is complicated and the cost is high. Proximity sensors have several major disadvantages: the main analog signals, are subject to interference and require complex program control; the cost per se is higher. The optical fiber sensor mainly has the following disadvantages: a reflecting baffle needs to be installed, so that the installation is complicated; the supply voltage is not 5V and needs circuit processing; the optical fiber transmission is not easy to bend; the cost is high.
In conclusion, how to overcome the defects of the existing sewing machine and detect the cloth efficiently and timely becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a cloth inspection method, a computer-readable storage medium, and an electronic terminal for overcoming the drawbacks of the prior art sewing machines and efficiently inspecting cloth in a timely manner.
In order to achieve the above and other related objects, the present invention provides a cloth detecting system for a sewing machine, comprising: a control module; the light collection module generates a photoelectric effect according to the light intensity change caused by cloth shielding and forms a corresponding electric signal; the signal processing module is in communication connection with the light ray acquisition module and the control module so as to process the electric signal and generate a switching signal; and the signal processing module sends the switch signal to the control module so that the control module can detect the state of the cloth.
In an embodiment of the cloth detection system of the present invention, the light collection module includes any one or a combination of a photoresistor, a silicon photocell, a photodiode, and a phototriode.
In an embodiment of the invention, the light collecting module includes a plurality of photo resistors, and is disposed on a platen of the sewing machine, and includes: the first photoresistor is arranged at a first position where the cloth enters the bedplate so as to detect whether the cloth arrives; the second photoresistor is arranged on a moving path of the cloth along the bedplate so as to detect the motion information of the cloth; and the third photoresistor is arranged at a second position where the cloth leaves the bedplate so as to detect the information whether the sewing of the cloth is finished and/or whether the cloth is stacked on the bedplate.
In an embodiment of the cloth detection system of the present invention, the light collection module includes a photo resistor, the photo resistor includes an outer surface contacting with the cloth, and the outer surface is made of an anti-abrasion material.
In an embodiment of the invention, the signal processing module includes: an amplifier and a comparator.
In an embodiment of the present invention, a sewing machine includes a sewing machine table, wherein the cloth detection system is integrated on a PCB board, and the PCB board is fixed on the sewing machine table.
In an embodiment of the present invention, a cloth detecting method is applied to a control module, and the cloth detecting method includes: receiving a switching signal from a signal processing module; the signal processing module is in communication connection with the light collecting module, the light collecting module generates a photoelectric effect according to the light intensity change caused by cloth shielding, and the light collecting module converts the change of a non-electric signal generated by the cloth into the change of an electric signal; the signal processing module processes the electric signal converted by the light ray acquisition module to generate the switching signal; judging whether cloth exists or not according to the switching signal; if the cloth is judged to exist, the electromagnet (or the electromagnetic valve) is controlled to work.
In an embodiment of the present invention, a cloth detecting method is further configured to perform the following steps: receiving a filtered signal from a signal processing module; judging the type of the cloth; the types of the cloth comprise thicker cloth, normal thickness cloth and thinner or hollow cloth; if the cloth type is thicker cloth, setting the signal amplification factor of the signal processing module as a first numerical value; if the cloth type is normal thickness cloth, setting the signal amplification factor of the signal processing module as a second numerical value; if the cloth type is thin or hollow cloth, setting the signal amplification factor of the signal processing module as a third numerical value; wherein the third value is greater than the second value, and the second value is greater than the first value.
In an embodiment of the present invention, a computer-readable storage medium stores thereon a computer program, which when executed by a processor, implements the cloth detecting method.
In an embodiment of the present invention, an electronic terminal includes: a processor and a memory; the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory so as to enable the terminal to execute the cloth detection method.
As described above, the cloth detecting system, method, computer readable storage medium, and electronic terminal provided by the present invention have the following advantages:
(1) the light ray collection module has high sensitivity and stable signal and is suitable for detecting natural light;
(2) the installation is easy;
(3) the device can be randomly installed on a sewing machine table, is almost unlimited, can be used for various matching detections, and can monitor the condition of cloth on the table in real time;
(4) the abrasion of the surface of the light collection module such as a photoresistor can be effectively prevented, and the service life is prolonged;
(5) the cost is low.
Drawings
Fig. 1 is a schematic circuit diagram of a cloth inspection system according to an embodiment of the present invention.
Fig. 2 is an exploded view of a cloth inspection system according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart illustrating a cloth inspection method according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an electronic terminal according to an embodiment of the invention.
Description of the element reference numerals
100 cloth detecting system
101 control module
102 light collection module
103 signal processing module
104 photo-resistor
105 silicon photocell
106 photodiode
107 phototriode
201 Sewing machine table
202 cloth
203 photoresistor signal line
204 first photo-resistor
205 second photo-resistor
206 third photo resistance
401 processor
402 memory
403 communication interface
404 system bus
Method steps S301 to S303
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, the present invention provides a cloth detecting system applied to a sewing machine, the cloth detecting system comprising: a control module 101; the light collection module 102 generates a photoelectric effect according to the intensity change of light caused by the shielding of the cloth 202 and forms a corresponding electric signal; the signal processing module 103 is in communication connection with the light ray collection module 102 and the control module 101, and is used for processing the electric signal to generate a switching signal; the signal processing module 103 sends the switch signal to the control module 101, so that the control module 101 can detect the state of the cloth 202.
It should be noted that the communication connection includes, but is not limited to, a telecommunication connection, a wireless connection, or an electromagnetic coupling connection. The control module 101 may specifically adopt an MCU processor, a CPU processor, an Soc processor, an FPGA processor, or a DSP processor, etc. Preferably, the invention is used for cloth 202 detection of thick stock machines or automatic machines. By adopting the technical scheme, the control module 101 can detect only by connecting one common IO port with the signal processing module 103, is easy for signal processing and is not easy to be interfered by the outside world.
In the cloth detecting system according to an embodiment of the present invention, the light collecting module 102 includes any one or more combinations of a photo resistor 104, a silicon photocell 105, a photodiode, and a photo transistor 107. When the cloth 202 is covered, the light intensity changes, the resistance value of the photoresistor 104 receiving the light intensity changes, and the resistance value changes are converted into voltage changes; unlike the photoresistor 104 which changes by resistance, the silicon photocell 105, photodiode and phototransistor 107 convert changes in illumination intensity into changes in current according to the photovoltaic effect.
In an embodiment of the cloth detection system of the present invention, the light collection module 102 includes a photo-resistor 104, and the photo-resistor 104 is a high-sensitivity photo-resistor 104. The detection accuracy can be improved by using the high-sensitivity photoresistor 104.
In an embodiment of the cloth detection system of the present invention, the light collecting module 102 includes a photo resistor 104, and an anti-wear material is used on a photosensitive surface of the photo resistor 104; for example, a layer of resin glue is coated on the photosensitive surface of the photoresistor 104, and metal is coated outside the photoresistor 104, so that direct contact between the cloth 202 and photosensitive materials is avoided, the photosensitive surface of the photoresistor 104 cannot be abraded when the cloth 202 passes through the sewing machine table 201, the photoresistor 104 is prevented from being abraded due to long-term use, the photoresistor 104 is a resistance component, the performance of the device is guaranteed, and the service life of the device is prolonged.
As shown in fig. 2, in the cloth detecting system according to an embodiment of the present invention, the light collecting module 102 includes a plurality of photo resistors 104, which are disposed on the sewing machine table 201, and include: a first photo resistor 204 disposed at a first position where the cloth 202 enters the sewing machine table 201 to detect whether the cloth 202 arrives; a second photo resistor 205 provided on a path along which the cloth 202 moves along the sewing machine table 201 to detect motion information of the cloth 202; a third photo-resistor 206 is disposed at a second position of the cloth 202 away from the platen to detect information of whether the cloth 202 is sewn and/or whether the cloth 202 is stacked on the sewing machine platen 201. The first photo-resistor 204, the second photo-resistor 205 and the third photo-resistor 206 can be used independently or cooperatively. A first photosensitive resistor 204, a second photosensitive resistor 205 and a third photosensitive resistor 206 are arranged on a sewing machine platen 201 through a photosensitive resistor signal wire 203, the relative positions of the second photosensitive resistor 205 and the third photosensitive resistor 206 are not particularly required, the second photosensitive resistor 205 can be arranged close to the third photosensitive resistor 206, or as shown in figure 2, the second photosensitive resistor 205 is arranged at the side far away from the third photosensitive resistor 206, and a sewing machine conveys a cloth 202 along a sewing path. When the second photo-resistor 205 is mounted close to the third photo-resistor 206, it can be used in cooperation with the third photo-resistor 206, and can detect the position of the cloth 202 on the sewing machine table 201 more accurately: starting to sew, sewing in progress or sewing completed.
Specifically, if the cloth 202 covers the first photo-resistor 204, the cloth 202 arrives; if the cloth 202 covers the third photo-resistor 206 but does not cover the second photo-resistor 205, it is indicated that sewing is started; if the cloth 202 covers both the second photo-resistor 205 and the third photo-resistor 206, it indicates that sewing is being performed; the cloth 202 covers the second photo-resistor 205 and does not cover the third photo-resistor 206, indicating that the sewing is complete; the cloth 202 always covers the second photo resistor 205, indicating that there is a stack of cloth 202 on the sewing machine table 201. In the automatic sewing machine, the detection of the automatically sewn cloth 202 is effective. Meanwhile, for the optical fiber sensor and the correlation sensor in the prior art, the sensor at the position corresponding to the second photo-resistor 205 and the third photo-resistor 206 has a poor installation of the emitting head, but the invention has convenient installation and avoids the problem that the optical fiber of the optical fiber sensor is not easy to bend.
In an embodiment of the present invention, the signal processing module 103 includes: an amplifier and a comparator. Preferably, the amplifier is a differential amplifier. Specifically, an electrical signal (for example, voltage or current) is amplified by an amplifier, and then converted into a high-low level signal by a comparator to form a switching signal; taking voltage as an example, when the voltage is processed by the amplifier and the comparator, a comparison voltage is set, a first voltage value is output when no cloth 202 is shielded, a second voltage value is output when the cloth 202 is shielded, and the first voltage value and the second voltage value are compared and judged for the control module 101 to detect whether the cloth 202 exists or not, so that the response speed is high and the sensitivity is high.
In an embodiment of the present invention, a sewing machine includes a sewing machine table 201, wherein the cloth 202 detection system is integrated on a PCB board, and the PCB board is fixed on the sewing machine table 201. By adopting the technical scheme, the installation is convenient, the cost is saved, the PCB can be placed at a plurality of positions of the sewing machine table 201, the PCB only needs to be fixed on the sewing machine table 201, the PCB is flush with the surface of the sewing machine table 201 during installation, the limitation of the installation angle and the position does not need to be considered, the installation of the light barrier does not need to be considered, and the size can be adjusted according to the actual installation position.
As shown in fig. 3, corresponding to the above embodiment, the present invention can also provide a cloth detection method applied to the control module 101, and technical features in the above embodiment can be used in this embodiment, so that the same technical details are not repeated, and the cloth 202 detection method includes:
step S301: receiving a switching signal from the signal processing module 103; the signal processing module 103 is in communication connection with the light collection module 102, the light collection module 102 generates a photoelectric effect according to the light intensity change caused by the shielding of the cloth 202, and the light collection module 102 converts the change of the non-electric signal generated by the cloth 202 into the change of the electric signal; the signal processing module 103 processes the electrical signal converted by the light collecting module 102 to generate the switching signal; step S302: judging whether a cloth 202 exists or not according to the switching signal; step S303: if the cloth 202 is judged to be present, the electromagnet (or the electromagnetic valve) is controlled to work.
Specifically, after detecting the cloth 202, the control module 101 sends a low level signal to an electromagnet or an electromagnetic valve, such as a presser foot lifting electromagnet, a thread cutting electromagnet, and the like, to control the electromagnet to operate. Specifically, the light collection module 102 is installed in front of the presser foot of the sewing machine, when the light collection module 102 is covered by the cloth 202, the control module 101 sends a low level signal to control the presser foot to be lifted, the feed dog of the sewing machine conveys the cloth 202 forward for sewing, and similarly, whether front trimming or rear trimming is needed can be detected through the light collection module 102. It should be noted that the method is generally applicable to the detection of normal cloth 202.
In an embodiment of the present invention, a cloth detecting method is further configured to perform the following steps: receiving the filtered signal from the signal processing module 103; judging the type of the cloth 202: the types of the cloth 202 include a thicker cloth, a normal thickness cloth, and a thinner or hollow cloth (e.g., lace). If the cloth type is thick cloth, setting the signal amplification factor of the signal processing module 103 as a first numerical value; if the cloth type is normal thickness cloth, setting the signal amplification factor of the signal processing module 103 as a second numerical value; if the cloth type is thin or hollow cloth, setting the signal amplification factor of the signal processing module 103 as a third numerical value; wherein the third value is greater than the second value, and the second value is greater than the first value. The method can improve the detection deviation of the thin material or the hollow cloth. During program processing, different types of cloth 202 information need to be collected, calibrated, and judged. When the signal processing module 103 processes different types of cloth 202, the difference lies in that the amplification factors of the amplifiers are different: i.e., the thicker the cloth 202, the lower the magnification as the thickness increases. Therefore, unlike the normal cloth 202 and the thicker cloth 202, the magnification of the thinner or hollowed-out cloth 202 is larger.
Specifically, firstly, the electric signal of the light collection module 102 is filtered and then received to the DA port of the single chip microcomputer, the single chip microcomputer judges the type of the cloth 202 according to different DA values, the range of the DA values is divided into three parts from small to large, and the three parts correspond to the thin or hollow cloth 202, the normal cloth 202 and the thick cloth 202 in sequence. Secondly, calibrating normal detection on the normal cloth 202 and the thicker cloth 202, and judging by adopting the cloth detection method; for thinner or openwork cloth 202, calibration is first required and the electrical signal is amplified by a factor of hundreds to thousands by an amplifier. Similarly, for a thin or hollow cloth 202, when there is no cloth 202 covering, a first voltage value is output, the electrical signal is processed by using a differential amplifier, the circuit is matched with a program, and the signal is amplified in segments to output a second voltage value. When the electric signal is processed in a segmented mode, the signal is divided into a plurality of segments, the amplification coefficients of the segments are different, signal values are collected, the range of the collected signal values is judged, different amplification is carried out according to different ranges (namely, when different types of cloth 202 are processed, the amplification factors are different), the ranges of the finally amplified values are the same, and then the finally amplified values are compared with a first voltage value when no cloth exists, and high and low levels are output. Specifically, the normal cloth 202 or the thick cloth 202 is not amplified or amplified several times, and for the weak thin or hollow cloth 202, the weak thin or hollow cloth 202 needs to be amplified several tens of times or several hundreds of times or even thousands of times, so that the second value of the thin or hollow cloth 202 and the second value of the normal cloth 202 or the thick cloth 202 are in the same range, so as to perform the comparison and detection. By adopting the technical scheme, the error of processing the weak signal can be improved, and the situation that the thin or hollow cloth 202 cannot be detected because the weak signal is ignored is avoided. Preferably, the detection precision is higher by matching with the high-sensitivity photoresistor 104.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
As shown in fig. 4, a schematic structural diagram of another electronic terminal provided in the embodiment of the present application is shown. This example provides an electronic terminal, includes: a processor 401, a memory 402, a transceiver (not shown), a communication interface 403, and a system bus 404; the memory 402 and the communication interface 403 are connected to the processor 401 and the transceiver through the system bus 404 to complete communication therebetween, the memory 402 is used for storing computer programs, the communication interface 403 is used for communicating with other devices, and the processor 401 and the transceiver are used for operating the computer programs, so that the electronic terminal executes the steps of the cloth 202 detection method.
The system bus 404 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library).
The processor 401 may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the integrated circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
The memory 402 may include a Random Access Memory (RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory.
In summary, the cloth detecting system, the cloth detecting method, the computer readable storage medium, and the electronic terminal provided by the present invention are applied to a sewing machine, the light collecting module 102 can convert the light intensity variation into the variation of the electrical signal, the signal processing module 103 processes the electrical signal into the switching signal, and the control module 101 detects whether there is a cloth 202 through the switching signal. The detection cloth 202 has the advantages of high reaction speed and high sensitivity. The technical scheme effectively solves the problems that the infrared opposite-emitting tube is inconvenient to install, the receiving tube is easy to wear and the signal processing is complex; proximity sensor signal processing is complex and costly; and the problems of difficult installation of the light barrier of the optical fiber sensor, power supply voltage treatment and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described 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 (8)
1. A cloth detection system, which is applied to a sewing machine, the cloth detection system comprising:
a control module;
the light collection module generates a photoelectric effect according to the light intensity change caused by cloth shielding and forms a corresponding electric signal; the light collection module comprises a plurality of photoresistors, is arranged on a table plate of the sewing machine and comprises: the first photoresistor is arranged at a first position where the cloth enters the bedplate so as to detect whether the cloth arrives; the second photoresistor is arranged on a moving path of the cloth along the bedplate so as to detect the motion information of the cloth; the third photoresistor is arranged at a second position where the cloth leaves the bedplate so as to detect information of whether the cloth is sewn or not and/or whether the cloth is stacked on the bedplate or not; the second photoresistor is arranged close to the third photoresistor to be matched with the third photoresistor for use, and the control module detects the position of the cloth on the table plate, wherein the position of the cloth on the table plate comprises a sewing starting position, a sewing position and a sewing finishing position; wherein if the cloth covers the first photo-resistor, the cloth arrives; if the cloth covers the third photosensitive resistor but does not cover the second photosensitive resistor, the sewing is started; if the cloth covers the second light-sensitive resistor and the third light-sensitive resistor at the same time, the sewing is indicated; the cloth covers the second light-sensitive resistor but does not cover the third light-sensitive resistor, which indicates that the sewing is finished; the cloth always covers the second photoresistor, which indicates that the cloth is stacked on the sewing machine table;
the signal processing module is in communication connection with the light ray acquisition module and the control module so as to process the electric signal and generate a switching signal; the signal processing module sends the switch signal to the control module so that the control module can detect the state of the cloth;
the control module receives a filtering signal from the signal processing module; judging the type of the cloth: the types of the cloth comprise thicker cloth, normal thickness cloth and thinner or hollow cloth; if the cloth type is thicker cloth, setting the signal amplification factor of the signal processing module as a first numerical value; if the cloth type is normal thickness cloth, setting the signal amplification factor of the signal processing module as a second numerical value; if the cloth type is thin or hollow cloth, setting the signal amplification factor of the signal processing module as a third numerical value; wherein the third value is greater than the second value, and the second value is greater than the first value.
2. The cloth detection system of claim 1, wherein the light collection module comprises any one or more of a photoresistor, a silicon photocell, a photodiode, and a phototriode.
3. The cloth detection system of claim 2, wherein the light collection module comprises a photo resistor; the photoresistor comprises an outer surface which is in contact with the cloth, and the outer surface is made of an anti-abrasion material.
4. The cloth detection system of claim 1, wherein the signal processing module comprises: an amplifier and a comparator.
5. A sewing machine comprising a sewing machine table, further comprising a cloth detection system as claimed in claim 1; the cloth detection system is integrated on a PCB, and the PCB is fixed on the sewing machine table.
6. A cloth detection method is applied to a control module and comprises the following steps:
receiving a switching signal from a signal processing module; wherein, signal processing module and light collection module communication connection, light collection module shelters from the strong and weak change of light that leads to according to the cloth, produces the photoelectric effect, light collection module includes a plurality of photo resistance, locates on sewing machine's the platen, it includes: the first photoresistor is arranged at a first position where the cloth enters the bedplate so as to detect whether the cloth arrives; the second photoresistor is arranged on a moving path of the cloth along the bedplate so as to detect the motion information of the cloth; the third photoresistor is arranged at a second position where the cloth leaves the bedplate so as to detect information of whether the cloth is sewn or not and/or whether the cloth is stacked on the bedplate or not; wherein the second photoresistor is mounted adjacent to the third photoresistor for use in cooperation with the third photoresistor; the light collection module converts the change of the non-electric signal generated by the cloth into the change of the electric signal; the signal processing module processes the electric signal converted by the light ray acquisition module to generate the switching signal;
judging whether cloth exists or not according to the switching signal;
if the cloth is judged to exist, controlling an electromagnet or an electromagnetic valve to work;
the position of the cloth on the bedplate is judged by combining signals of the second photoresistor and the third photoresistor, wherein the position of the cloth on the bedplate comprises a sewing starting position, a sewing position and a sewing finishing position; wherein if the cloth covers the first photo-resistor, the cloth arrives; if the cloth covers the third light-sensitive resistor but does not cover the second light-sensitive resistor, the sewing is started; if the cloth covers the second light-sensitive resistor and the third light-sensitive resistor at the same time, the sewing is indicated; the cloth covers the second light-sensitive resistor but does not cover the third light-sensitive resistor, which indicates that the sewing is finished; the cloth covers the second photoresistor all the time, and the cloth is stacked on the sewing machine table plate;
receiving a filtered signal from a signal processing module;
judging the type of the cloth: the types of the cloth comprise thicker cloth, normal thickness cloth and thinner or hollow cloth; if the cloth type is thicker cloth, setting the signal amplification factor of the signal processing module as a first numerical value; if the cloth type is normal thickness cloth, setting the signal amplification factor of the signal processing module as a second numerical value; if the cloth type is thin or hollow cloth, setting the signal amplification factor of the signal processing module as a third numerical value; wherein the third value is greater than the second value, and the second value is greater than the first value.
7. A computer-readable storage medium on which a computer program is stored, the program being characterized by implementing the cloth inspecting method of claim 6 when executed by a processor.
8. An electronic terminal, comprising: a processor and a memory;
the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory so as to enable the terminal to execute the cloth detecting method according to claim 6.
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| CN201810538794.5A CN110552123B (en) | 2018-05-30 | 2018-05-30 | Cloth detection system, cloth detection method, computer-readable storage medium and electronic terminal |
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