Cloth sewing control circuit and method and sewing machine

Abstract

The invention relates to a cloth sewing control circuit and method and a sewing machine. The circuit comprises a main controller, a detection controller, a first communication circuit, a second communication circuit and a detection circuit, wherein the first communication circuit and the second communication circuit are connected between the detection controller and the main controller, and the detection circuit is connected with the detection controller. The main controller is used for sending a motion detection parameter of the detection circuit to the detection controller through the first communication circuit, and is also used for receiving an operation control signal sent by the detection controller through the second communication circuit and executing corresponding sewing operation on cloth based on the operation control signal; the detection circuit is used for detecting the motion state of the cloth on the sewing table and sending a corresponding detection signal to the detection controller; the detection controller is used for receiving the detection signal sent by the detection circuit and generating a corresponding operation control signal based on the detection signal and the corresponding motion detection parameter, and the problem that the sewing quality is reduced due to the fact that the operation control signal cannot be transmitted to the motion control unit in time is solved.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular to a fabric sewing control circuit, method and sewing machine. Background Art

[0002] The sewing machine detects the movement state of the fabric on the sewing table through a fabric detector, and executes corresponding sewing actions according to the movement state, such as lifting and pressing the presser foot, cutting the thread, etc. In the related art, when the fabric detector detects the movement state of the fabric and transmits the movement state information of the fabric to the relevant action control unit, there is a certain delay phenomenon. This delay phenomenon causes the sewing machine to be unable to execute the sewing actions corresponding to the movement state in a timely manner, affecting the sewing effect. For example, the delay of the thread cutting action will cause the length of the remaining thread on the fabric after thread cutting to be relatively long, or the length of the thread head to be unstable, etc., reducing the sewing quality. Summary of the Invention

[0003] In this embodiment, a fabric sewing control circuit, method and sewing machine are provided to solve the problem in the related art that there is a delay phenomenon when the movement state information of the fabric is transmitted to the action control unit, resulting in a reduction in sewing quality.

[0004] In a first aspect, in this embodiment, a fabric sewing control circuit is provided. The circuit includes a main controller, a detection controller, a first communication circuit and a second communication circuit connected between the detection controller and the main controller, and a detection circuit connected to the detection controller;

[0005] The main controller is configured to send the motion detection parameters of the detection circuit to the detection controller through the first communication circuit, and is further configured to receive the operation control signal sent by the detection controller through the second communication circuit, and perform corresponding sewing operations on the fabric based on the operation control signal;

[0006] The detection circuit is configured to detect the movement state of the fabric on the sewing table and send the corresponding detection signal to the detection controller;

[0007] The detection controller is configured to receive the detection signal sent by the detection circuit, generate a corresponding operation control signal based on the detection signal and the corresponding motion detection parameters, and send it to the main controller.

[0008] In some of these embodiments, the second communication circuit includes at least one second communication sub-circuit; each second communication sub-circuit is used to transmit one of the operation control signals.

[0009] In some of these embodiments, the second communication sub-circuit includes a signal transmission optocoupler, a diode, a first pull-up resistor, a second pull-up resistor and a voltage dividing resistor,

[0010] One end of the signal transmission optocoupler is connected to the receiving end of the main controller and one end of the first pull-up resistor, and the other end of the first pull-up resistor is connected to the power supply end of the main controller; the second end of the signal transmission optocoupler is grounded; the third end of the signal transmission optocoupler is connected to one end of the second pull-up resistor, one end of the voltage-dividing resistor and the negative electrode of the diode; the other end of the second pull-up resistor is connected to the power supply end of the detection controller; the other end of the voltage-dividing resistor is connected to the positive electrode of the diode and the sending end of the detection controller.

[0011] In some embodiments, the detection circuit includes at least one infrared emitter and corresponding infrared receivers, and the motion detection parameters include the infrared emission intensity corresponding to each infrared emitter and the detection voltage threshold corresponding to each infrared receiver.

[0012] The detection controller is configured to configure the corresponding infrared emitter based on the infrared emission intensity.

[0013] The detection controller is further configured to generate an operation control signal corresponding to the infrared receiver based on the comparison result between the detection voltage threshold corresponding to each infrared receiver and the detection voltage, and the detection voltage is obtained by conversion based on the infrared light signal received by the infrared receiver.

[0014] In some embodiments, the infrared emitter is correspondingly arranged with a plurality of infrared receivers.

[0015] The main controller is configured to select a target infrared receiver from the plurality of infrared receivers.

[0016] The detection controller is configured to generate a corresponding operation control signal based on the comparison result between the detection voltage threshold corresponding to the target infrared receiver and the detection voltage.

[0017] In some embodiments, the detection circuit further includes a detection signal processor connected to the detection controller, each infrared emitter, and each infrared receiver.

[0018] The detection signal processor is configured to generate a drive signal for the corresponding infrared emitter based on the infrared emission intensity; and is further configured to convert the detection current output by each infrared receiver into a corresponding detection voltage and send it to the detection controller.

[0019] In some embodiments, the motion detection parameters are transmitted in the form of pulse signals through the serial ports of the main controller and the detection controller.

[0020] The operation control signal is transmitted in the form of a level signal through the input / output ports of the main controller and the detection controller.

[0021] In a second aspect, in this embodiment, a cloth sewing control method is provided. The method is applied to a detection controller in the cloth sewing control circuit as described in the first aspect. The method includes:

[0022] Receiving, through the first communication circuit, the motion detection parameters of the detection circuit sent by the main controller;

[0023] Receiving the detection signal sent by the detection circuit, and generating a corresponding operation control signal based on the detection signal and the corresponding motion detection parameters;

[0024] Sending, through the second communication circuit, the operation control signal to the main controller, so that the main controller performs corresponding sewing operations on the cloth based on the operation control signal.

[0025] In some of these embodiments, the detection circuit includes at least one infrared emitter and a corresponding infrared receiver. The motion detection parameters include the infrared emission intensity corresponding to each infrared emitter and the detection voltage threshold corresponding to each infrared receiver. Generating a corresponding operation control signal based on the detection signal and the corresponding motion detection parameters includes:

[0026] Configuring a corresponding infrared emitter based on the infrared emission intensity;

[0027] Generating an operation control signal corresponding to the infrared receiver based on the comparison result between the detection voltage threshold corresponding to each infrared receiver and the detection voltage, where the detection voltage is obtained by converting the infrared light signal received by the infrared receiver.

[0028] In a second aspect, in this embodiment, a sewing machine is provided. The sewing machine includes the cloth sewing control circuit as described in the first aspect.

[0029] Compared with the related art, in the cloth sewing control circuit provided in this embodiment, the main controller sends the motion detection parameters of the detection circuit to the detection controller through the first communication circuit. The detection controller generates a corresponding operation control signal according to the motion detection parameters and the detection signal sent by the detection circuit, and sends it to the main controller through the second communication circuit. The main controller performs corresponding sewing operations on the cloth according to the operation control signal. That is, the motion detection parameters and the operation control signal are transmitted separately through the first communication circuit and the second communication circuit. The operation control signal is sent to the main controller through a dedicated second communication circuit, avoiding the delay phenomenon that occurs when the operation control signal of the cloth is transmitted to the motion control unit and improving the sewing quality.

[0030] The details of one or more embodiments of this application are set forth in the following drawings and description to make the other features, objects, and advantages of this application more concise and understandable. Brief Description of the Drawings

[0031] The drawings described herein are provided to further understand the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not unduly limit the present application. In the drawings:

[0032] Figure 1 is a structural block diagram of a fabric sewing control circuit according to some embodiments of the present application;

[0033] Figure 2 is a schematic connection diagram of a second communication circuit with a main controller and a detection controller according to some embodiments of the present application;

[0034] Figure 3 is a schematic circuit topology diagram of a second communication sub - circuit according to some embodiments of the present application;

[0035] Figure 4 is a schematic connection diagram of a detection controller and a detection circuit according to some embodiments of the present application;

[0036] Figure 5 is a schematic connection diagram of a detection controller and a detection circuit according to some other embodiments of the present application;

[0037] Figure 6 is a schematic connection diagram of a detection controller and a detection circuit according to some further embodiments of the present application;

[0038] Figure 7 is a schematic circuit connection diagram of a detection controller and a main controller according to some embodiments of the present application;

[0039] Figure 8 is a flowchart of a fabric sewing control method according to some embodiments of the present application;

[0040] Figure 9 is a flowchart of generating an operation control signal based on a detection signal and a motion detection parameter according to some embodiments of the present application. Detailed Description of the Embodiments

[0041] To more clearly understand the purpose, technical solution, and advantages of the present application, the present application is described and explained below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] Unless otherwise defined, technical terms or scientific terms involved in this application shall have the general meanings understood by those with ordinary skills in the technical field to which this application belongs. In this application, words such as "a", "an", "one kind", "the", "these", etc. do not indicate a limitation in quantity, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products or devices. The terms "connect", "be connected", "couple" and other similar words involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "a plurality of" involved in this application means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific sorting of the objects.

[0043] Please refer to Figure 1 As shown, it is a structural block diagram of a fabric sewing control circuit according to some embodiments of this application. The fabric sewing control circuit includes a main controller 10, a detection controller 20, a first communication circuit 11 and a second communication circuit 22 connected between the detection controller 20 and the main controller 10, and a detection circuit 30 connected to the detection controller 20.

[0044] The main controller 10 is used to send the motion detection parameter Par of the detection circuit 30 to the detection controller 20 through the first communication circuit 11, and is also used to receive the operation control signal Ctr sent by the detection controller 20 through the second communication circuit 22, and perform corresponding sewing operations on the fabric based on the operation control signal Ctr;

[0045] The detection circuit 30 is used to detect the motion state of the fabric on the sewing table and send the corresponding detection signal SigV to the detection controller 20;

[0046] The detection controller 20 is used to receive the detection signal SigV sent by the detection circuit 30, generate the corresponding operation control signal Ctr based on the detection signal SigV and the corresponding motion detection parameter Par, and send it to the main controller 10.

[0047] Those of ordinary skill in the art can understand thatFigure 1 The structure shown is only schematic and does not limit the structure of the above fabric sewing control circuit. For example, the fabric sewing control circuit may further include more or fewer components than those shown in Figure 1 or have a different configuration from that shown in Figure 1 For example, the fabric sewing control circuit may further include a thread cutting circuit for performing specific sewing operations, etc.

[0048] In this embodiment, the main controller 10 may be the controller of the sewing machine's electronic control system, and the detection controller 20 may be the controller of the fabric detection module of the sewing machine. Specifically, the main controller 10 and the detection controller 20 may be a CPU, an MCU, a single-chip microcomputer, etc. with signal processing functions.

[0049] When the sewing machine needs to sew a piece of fabric during operation, the presser foot of the sewing machine is controlled to lift to a specified initial position so that a piece of fabric to be sewn is placed at the sewing position on the sewing table; at the start of work, the presser foot is controlled to lower to the working position to press the fabric to be sewn on the sewing table, and in cooperation with the movement of the feed dog arranged below the sewing table, the fabric is moved in a preset direction. During the sewing process, a front thread loop is formed at the front end of the fabric to be sewn, and a back thread loop is formed at the rear end of the already sewn fabric, and the front thread loop is trimmed when the sewing machine starts sewing, and the back thread loop is trimmed when sewing ends. Therefore, during the sewing process, the action timing of sewing operations such as thread cutting and presser foot lifting can be controlled according to the movement state of the fabric on the sewing table, such as the positions of the front and rear ends of the fabric.

[0050] Among them, the detection circuit 30 is used to detect the movement state of the fabric on the sewing table and send the corresponding detection signal to the detection controller 20. Specifically, the detection circuit 30 can sense the specific positions of the front and rear ends of the fabric on the sewing table through sensors, and the sensors can be arranged at preset positions on the sewing table. When the front and rear ends of the fabric reach the positions where the sensors are located, the detection circuit 30 sends the corresponding detection signal SigV to the detection controller 20.

[0051] The main controller 10 sends the movement detection parameter Par of the detection circuit 30 to the detection controller 20 through the first communication circuit 11. The movement detection parameter Par may include the configuration parameters of each sensor in the detection circuit 30. The detection controller 20 determines the movement state of the fabric according to the detection signal SigV sent by each sensor and the movement detection parameter Par corresponding to each sensor, such as whether the front or rear end of the fabric moves to a preset position, and generates the corresponding operation control signal Ctr, and sends the operation control signal Ctr to the main controller 10 through the second communication circuit 22. The main controller 10 performs the corresponding sewing operation on the fabric according to the operation control signal Ctr, and the sewing operation may be a thread cutting operation, a presser foot lifting operation, etc.

[0052] In this embodiment, for the cloth sewing control circuit, the main controller sends the motion detection parameters of the detection circuit to the detection controller through the first communication circuit. The detection controller generates corresponding operation control signals according to the motion detection parameters and the detection signals sent by the detection circuit, and sends them to the main controller through the second communication circuit. The main controller performs corresponding sewing operations on the cloth according to the operation control signals. That is, through the first communication circuit and the second communication circuit, the motion detection parameters and the operation control signals are transmitted separately. The operation control signals are sent to the main controller through a dedicated second communication circuit, avoiding the delay phenomenon that occurs when the operation control signals of the cloth are transmitted to the motion control unit and improving the sewing quality.

[0053] In some embodiments, Figure 2 is a schematic connection diagram of the second communication circuit with the main controller and the detection controller in some embodiments of the present application. As Figure 2 shown, the second communication circuit 22 includes at least one second communication sub-circuit 220; each second communication sub-circuit 220 is used to transmit an operation control signal Ctr_1, Ctr_2,... Ctr_N.

[0054] The second communication circuit 220 is used to transmit the operation control signals from the detection controller 20 to the main controller 10. The operation control signals may include a front thread trimming control signal, a rear thread trimming control signal, a presser foot lifting control signal, etc. For the operation control signals corresponding to each operation, the corresponding second communication sub-circuit 220 can be used for separate transmission, and multiple operation control signals can be transmitted simultaneously, so that the main controller 10 can obtain the corresponding operation control signals in time and perform corresponding operations, avoiding the problems of signal type determination and delay processing caused by receiving multiple operation control signals through the same second communication sub-circuit.

[0055] In a specific embodiment, Figure 3 is a schematic circuit topology diagram of the second communication sub-circuit in some embodiments of the present application. As Figure 3 shown, the second communication sub-circuit 220 includes a signal transmission optocoupler U6, a diode D3, a first pull-up resistor R8, a second pull-up resistor R7, and a voltage dividing resistor R9.

[0056] The first end of the signal transmission optocoupler U6 is connected to the receiving end of the main controller 10 and one end of the first pull-up resistor R8, and the other end of the first pull-up resistor R8 is connected to the power supply terminal VDD of the main controller; the second end of the signal transmission optocoupler U6 is grounded; the third end of the signal transmission optocoupler U6 is connected to one end of the second pull-up resistor R7, one end of the voltage dividing resistor R9, and the cathode of the diode D3; the other end of the second pull-up resistor R7 is connected to the power supply terminal VCC of the detection controller 20; the other end of the voltage dividing resistor R9 is connected to the anode of the diode D3 and the sending end of the detection controller 20.

[0057] When the power supply terminals of the main controller 10 and the detection controller 20 are different, the isolation transmission of the operation control signal Ctr can be performed through the second communication sub-circuit 220 to prevent the interference signal at one end of the detection controller 20 from being transmitted to one end of the main controller 10. The diode D3 plays a voltage stabilizing role.

[0058] In another embodiment, the signal transmission optocoupler U6 can be replaced with a capacitance isolation chip, and the corresponding peripheral circuit is modified.

[0059] In yet another embodiment, when the power supply terminals of the main controller 10 and the detection controller 20 are the same, the corresponding pins of the main controller 10 and the detection controller 20 can also be directly connected using wires.

[0060] In some embodiments, Figure 4 is a schematic connection diagram of the detection controller and the detection circuit according to some embodiments of the present application. As Figure 4 shown, the detection circuit 30 includes at least one infrared emitter 301 and the corresponding infrared receiver 302 ( Figure 4 shows 2 infrared emitters 301 and the corresponding infrared receivers 302). The motion detection parameters received by the detection controller 20 include the infrared emission intensities Par_int1, Par_int2 corresponding to each infrared emitter 301, and the detection voltage thresholds Par_vol1, Par_vol2 corresponding to each infrared receiver 302. Among them, the detection controller 20 is used to configure the corresponding infrared emitter 301 based on the infrared emission intensities Par_int1, Par_int2; the detection controller 20 is also used to generate the operation control signals Ctr_1, Ctr_2 corresponding to each infrared receiver 302 based on the comparison results between the detection voltage thresholds Par_vol1, Par_vol2 corresponding to each infrared receiver 302 and the detection voltages SigV_1, SigV_2, where the detection voltages SigV_1, SigV_2 are obtained by converting the infrared light signals received by the infrared receivers 302.

[0061] For the infrared emitters 301 and the corresponding infrared receivers 302 set at different positions on the sewing table, the infrared emission intensity corresponding to each infrared emitter 301 and the detection voltage threshold of the infrared receiver 302 corresponding to this infrared emitter 301 can be obtained through pre-adjustment and sent to the detection controller 20 by the main controller 10. Since there are individual differences among different infrared emitters 301 and infrared receivers 302, and there are also differences and interference factors in the positions and environments of each infrared emitter 301 and infrared receiver 302, the accuracy of detecting the movement state of the fabric can be enhanced by separately setting the infrared emission intensities and detection voltage thresholds of each infrared emitter 301 and infrared receiver 302.

[0062] In a further embodiment, the infrared emitter 301 and the corresponding infrared receiver 302 provided at different positions on the sewing table can pre-determine the correspondence with the operation control signal, and can also modify the correspondence with the operation control signal by re-setting the motion detection parameters. For example, the detection voltage generated by the infrared emitter 301 at a specific position and the corresponding infrared receiver 302 is used to generate the front thread trimming control signal. In the case of re-modifying the motion detection parameters of the infrared emitter 301 and the corresponding infrared receiver 302, the infrared emitter 301 and the corresponding infrared receiver 302 can be used to generate the back thread trimming control signal.

[0063] Further, in some embodiments, Figure 5 It is a schematic connection diagram of the detection controller and the detection circuit according to some other embodiments of the present application. As Figure 5 shown, in the detection circuit 30, the same infrared emitter 301 can be correspondingly arranged with multiple infrared receivers 302 (2 infrared receivers 302 are shown corresponding to the same infrared emitter 301 in the figure). The multiple infrared receivers 302 respectively generate corresponding detection voltages SigV_1, SigV_1' based on the infrared light of the infrared emitter 301 received. The main controller is used to select a target infrared receiver from the multiple infrared receivers 302; the detection controller 20 is used to generate a corresponding operation control signal Ctr_1 based on the comparison result between the detection voltage threshold Par_vol1 corresponding to the target infrared receiver and the detection voltage.

[0064] In this embodiment, by correspondingly arranging the same infrared emitter 301 with multiple infrared receivers 302, the distances between the multiple infrared receivers 302 and the operating device are different. For example, the distances between two infrared receivers 302 and the thread trimming knife are different. When the fabric moving speed is relatively fast, the main controller 10 can specify the infrared receiver 302 farther away from the thread trimming knife as the target infrared receiver to leave sufficient detection and operation time to avoid that the thread trimming knife fails to perform the thread trimming operation in time.

[0065] In some embodiments, Figure 6 It is a schematic connection diagram of the detection controller and the detection circuit according to some other embodiments of the present application. As Figure 6As shown, the detection circuit 30 further includes a detection signal processor 31 connected to the detection controller 20, each infrared emitter 301, and each infrared receiver 302. The detection signal processor 31 is configured to generate corresponding drive signals Dr_int1 and Dr_int2 for the infrared emitters 301 based on the infrared emission intensities Par_int1 and Par_int2; and is further configured to convert the detection currents SigI_1 and SigI_2 output by each infrared receiver 302 into corresponding detection voltages SigV_1 and SigV_2 and send them to the detection controller 20.

[0066] In this embodiment, the detection signal processor 31 can be a driver for each infrared emitter 301 and each infrared receiver 302. According to the infrared emission intensity corresponding to each infrared emitter 301, it generates a corresponding drive signal for the infrared emitter to drive the infrared light emission; each infrared receiver 302 receives the infrared light signal generated by the corresponding infrared emitter 301, converts the infrared light signal into a corresponding detection current, and sends it to the detection signal processor 31. The detection signal processor 31 converts the detection currents corresponding to each infrared receiver 302 into corresponding detection voltages, providing another detection circuit for realizing the detection of the fabric movement state.

[0067] In some embodiments, the motion detection parameters are transmitted in the form of pulse signals through the serial ports of the main controller and the detection controller; the operation control signals are transmitted in the form of level signals through the input / output ports of the main controller and the detection controller.

[0068] In this embodiment, both the main controller and the detection controller are single-chip microcomputers with serial port transmission and input / output port transmission functions. The motion detection parameters are in the form of pulse signals and reach the detection controller through the serial port of the main controller, the first communication circuit, and the serial port of the detection controller. The operation control signals are in the form of level signals and reach the main controller through the input / output port (I / O port) of the detection controller, the second communication circuit, and the I / O port of the main controller.

[0069] Figure 7 It is a schematic circuit connection diagram of the detection controller and the main controller in some embodiments of this application. As Figure 7 shown, the main controller 10 and the detection controller 20 are connected through a first communication circuit 11 and a second communication circuit 22. The first communication circuit 11 includes a receiving sub-circuit 110 and a transmitting sub-circuit 120. The receiving sub-circuit 110 is connected to the serial port RXD of the main controller 10 and the serial port TXD of the detection controller 20; the transmitting sub-circuit 120 is connected to the serial port TXD of the main controller 10 and the serial port RXD of the detection controller 20. The pulse signal corresponding to the motion detection parameter is sent and received through the serial port.

[0070] The second communication circuit 22 includes two second communication sub - circuits 220, which respectively transmit two operation control signals. One of the two operation control signals is a front thread - cutting control signal, and the other is a rear thread - cutting control signal. These two operation control signals are respectively generated by the detection controller 20 according to the detection voltages corresponding to the front thread - cutting sensor and the rear thread - cutting sensor in the detection circuit (the thread - cutting sensor can be an infrared emitter and an infrared receiver) and the corresponding detection voltage thresholds. One of the second communication sub - circuits 220 is connected to the IO0 terminal of the main controller 10 and the IO0 terminal of the detection controller 20; the other second communication sub - circuit 220 is connected to the IO1 terminal of the main controller 10 and the IO1 terminal of the detection controller 20. The level signals corresponding to the operation control signals are sent and received through the IO ports.

[0071] Specifically, the detection controller 20 can be connected to a detection signal processor, and the detection signal processor is connected to two infrared emitters 301 and the corresponding infrared receivers 302, which are respectively used as sensors for controlling front thread - cutting and rear thread - cutting. When the front end of the fabric begins to cover the front thread - cutting sensor and continues to move forward, the current value generated by the front thread - cutting sensor changes, resulting in the voltage of the corresponding pin of the detection signal processor changing from high to low. When the voltage is lower than SigV_1, the IO0 of the detection controller 20 outputs a high level, which is transmitted to the IO0 pin of the main controller 10 through a second communication sub - circuit 220. Then, the main controller 10 controls the relevant thread - cutting drive circuit to perform front thread - cutting.

[0072] When the end of the fabric begins to leave the rear thread - cutting sensor and continues to move forward, the current value generated by the rear thread - cutting sensor changes, resulting in the voltage of the corresponding pin of the detection signal processor changing from low to high. When the voltage is higher than SigV_2, the IO1 of the detection controller 20 outputs a low level, which is transmitted to the IO1 pin of the main controller 10 through another second communication sub - circuit 220. Then, the main controller 10 controls the relevant thread - cutting drive circuit to perform rear thread - cutting.

[0073] In some other embodiments, the second communication circuit 22 may further include a second communication sub - circuit 220 for transmitting a presser - foot lifting control signal, or a second communication sub - circuit 220 for transmitting other operation control signals.

[0074] In this embodiment, a fabric sewing control method is also provided, and this method is applied to the detection controller in the fabric sewing control circuit in the foregoing embodiment. Figure 8 It is a flowchart of the fabric sewing control method in some embodiments of the present application. As Figure 8 shown, the process includes the following steps:

[0075] Step S801, receive the motion detection parameters of the detection circuit sent by the main controller through the first communication circuit.

[0076] Step S802: Receive the detection signal sent by the detection circuit, and generate a corresponding operation control signal based on the detection signal and the corresponding motion detection parameter.

[0077] Step S803: Send the operation control signal to the main controller through the second communication circuit, so that the main controller performs corresponding sewing operations on the fabric based on the operation control signal.

[0078] In the fabric sewing control method of this embodiment, through the first communication circuit, receive the motion detection parameters of the detection circuit sent by the main controller to obtain the configuration parameters of the detection circuit and the basis for judging the motion state; by receiving the detection signal sent by the detection circuit, generate a corresponding operation control signal according to the detection signal and the corresponding motion detection parameter, and judge the motion state of the fabric according to the received detection signal; send the operation control signal to the main controller through the second communication circuit, and the main controller performs corresponding sewing operations on the fabric according to the operation control signal. Through the first communication circuit and the second communication circuit, the motion detection parameter and the operation control signal are transmitted separately, avoiding the delay phenomenon that occurs when the operation control signal of the fabric is transmitted to the motion control unit, and improving the sewing quality.

[0079] In some of these embodiments, the detection circuit includes at least one infrared emitter and the corresponding infrared receiver, and the motion detection parameters include the infrared emission intensity corresponding to each infrared emitter and the detection voltage threshold corresponding to each infrared receiver. Figure 9 It is a flowchart of generating an operation control signal based on the detection signal and the motion detection parameter in some embodiments of the present application. As Figure 9 shown, this process includes the following steps:

[0080] Step S901: Configure the corresponding infrared emitter based on the infrared emission intensity.

[0081] Step S902: Generate an operation control signal corresponding to the infrared receiver based on the comparison result between the detection voltage threshold corresponding to each infrared receiver and the detection voltage, and the detection voltage is obtained by converting the infrared light signal received by the infrared receiver.

[0082] In the fabric sewing control method of this embodiment, by configuring the corresponding infrared emitter based on the infrared emission intensity and generating an operation control signal corresponding to the infrared receiver based on the comparison result between the detection voltage threshold corresponding to each infrared receiver and the detection voltage, it avoids the judgment error caused by the individual differences, position and environmental differences, and interference factors of the infrared emitter and the infrared receiver, and improves the accuracy of fabric motion state detection.

[0083] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation manners, and will not be elaborated in this embodiment.

[0084] In this embodiment, a sewing machine is further provided, and the sewing machine includes the fabric sewing control circuit in the above embodiment.

[0085] For the sewing machine in this embodiment, the fabric sewing control circuit detects the movement state of the fabric on the sewing table and generates corresponding operation control signals, and based on the operation control signals, the sewing operation of the fabric is promptly executed, avoiding the problem of a relatively long length of the remaining thread ends and reduced sewing quality caused by the delay phenomenon when the movement state information of the fabric is transmitted to the motion control unit.

[0086] It should be noted that for the specific examples in this embodiment, reference may be made to the examples described in the above embodiment and the optional implementation manners, and details are not described herein again.

[0087] It should be understood that the specific embodiments described here are only used to explain this application, rather than to limit it. According to the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

[0088] Obviously, the drawings are only some examples or embodiments of this application. For those of ordinary skill in the art, this application can also be applied to other similar situations according to these drawings without creative work. In addition, it can be understood that although the work done during the development process here may be complex and time-consuming, for those of ordinary skill in the art, some design, manufacturing, or production changes based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient disclosure of this application.

[0089] The term "embodiment" in this application means that the specific features, structures, or characteristics described in combination with the embodiment may be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily mean the same embodiment, nor does it mean independence or alternative to other embodiments. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in this application can be combined with other embodiments without conflict.

[0090] The above-described embodiments only represent several implementation manners of this application, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of patent protection. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application shall be subject to the appended claims.

Claims

1. A cloth sewing control circuit, characterized in that, the circuit includes a main controller, a detection controller, a first communication circuit and a second communication circuit connected between the detection controller and the main controller, and a detection circuit connected to the detection controller; the main controller is configured to send the motion detection parameters of the detection circuit to the detection controller through the first communication circuit, and is further configured to receive the operation control signal sent by the detection controller through the second communication circuit, and perform corresponding sewing operations on the cloth based on the operation control signal; the detection circuit is configured to detect the motion state of the cloth on the sewing table and send the corresponding detection signal to the detection controller; the detection controller is configured to receive the detection signal sent by the detection circuit, generate a corresponding operation control signal based on the detection signal and the corresponding motion detection parameters, and send it to the main controller.

2. The circuit according to claim 1, characterized in that, the second communication circuit includes at least one second communication sub-circuit; each second communication sub-circuit is used to transmit one operation control signal.

3. The circuit according to claim 2, characterized in that, the second communication sub-circuit includes a signal transmission optocoupler, a diode, a first pull-up resistor, a second pull-up resistor and a voltage-dividing resistor, the first end of the signal transmission optocoupler is connected to the receiving end of the main controller and one end of the first pull-up resistor, and the other end of the first pull-up resistor is connected to the power supply end of the main controller; the second end of the signal transmission optocoupler is grounded; the third end of the signal transmission optocoupler is connected to one end of the second pull-up resistor, one end of the voltage-dividing resistor and the negative electrode of the diode; the other end of the second pull-up resistor is connected to the power supply end of the detection controller; the other end of the voltage-dividing resistor is connected to the positive electrode of the diode and the sending end of the detection controller.

4. The circuit according to claim 1, characterized in that, the detection circuit includes at least one infrared emitter and a corresponding infrared receiver, and the motion detection parameters include the infrared emission intensity corresponding to each infrared emitter and the detection voltage threshold corresponding to each infrared receiver, the detection controller is configured to configure the corresponding infrared emitter based on the infrared emission intensity; the detection controller is further configured to generate the operation control signal corresponding to the infrared receiver based on the comparison result between the detection voltage threshold corresponding to each infrared receiver and the detection voltage, and the detection voltage is obtained by converting the infrared light signal received by the infrared receiver.

5. The circuit according to claim 4, characterized in that, the infrared emitter is correspondingly arranged with a plurality of infrared receivers, the main controller is configured to select a target infrared receiver from the plurality of infrared receivers; the detection controller is configured to generate a corresponding operation control signal based on the comparison result between the detection voltage threshold corresponding to the target infrared receiver and the detection voltage.

6. The circuit according to claim 4, characterized in that, the detection circuit further includes a detection signal processor connected to the detection controller, each infrared emitter and each infrared receiver, The detection signal processor is configured to generate a drive signal for the corresponding infrared emitter based on the infrared emission intensity; and is further configured to convert the detection currents output by the respective infrared receivers into corresponding detection voltages and send them to the detection controller.

7. The circuit according to claim 1, wherein, the motion detection parameters are transmitted in the form of pulse signals through the serial ports of the main controller and the detection controller; the operation control signals are transmitted in the form of level signals through the input / output ports of the main controller and the detection controller.

8. A method for controlling cloth sewing, wherein, the method is applied to the detection controller in the cloth sewing control circuit according to any one of claims 1 to 7, and the method includes: receiving, through the first communication circuit, the motion detection parameters of the detection circuit sent by the main controller; receiving the detection signals sent by the detection circuit, and generating corresponding operation control signals based on the detection signals and the corresponding motion detection parameters; sending, through the second communication circuit, the operation control signals to the main controller, so that the main controller performs corresponding sewing operations on the cloth based on the operation control signals.

9. The method according to claim 8, wherein, the detection circuit includes at least one infrared emitter and corresponding infrared receivers, the motion detection parameters include the infrared emission intensities corresponding to the respective infrared emitters and the detection voltage thresholds corresponding to the respective infrared receivers, and generating corresponding operation control signals based on the detection signals and the corresponding motion detection parameters includes: configuring the corresponding infrared emitter based on the infrared emission intensity; generating the operation control signals corresponding to the infrared receivers based on the comparison results between the detection voltage thresholds corresponding to the respective infrared receivers and the detection voltages, where the detection voltages are obtained by converting the infrared light signals received by the infrared receivers.

10. A sewing machine, wherein, the sewing machine includes the cloth sewing control circuit according to any one of claims 1 to 7.

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