Rapier loom control method and system with main shaft motor assisting in braking

Abstract

The invention provides a control method and system for a rapier loom with a main shaft motor assisting in braking, and the method comprises the steps: obtaining a running state signal of the rapier loom, and judging whether the current rapier loom stops running or not according to the running state signal of the rapier loom; after the operation stop state signal of the rapier loom is obtained, a brake control signal of a spindle motor of the rapier loom is generated, so that the spindle motor of the rapier loom enters a brake state; after a spindle motor of the rapier loom enters a braking state, the rapier loom is controlled to execute a stopping action, and whether the stopping action of the current rapier loom is executed or not is judged; and if the execution of the stopping action of the current rapier loom is finished, further controlling the spindle motor to generate and maintain a reverse 0-speed current so as to control the spindle motor to maintain a 0-speed state and perform auxiliary reinforced braking in combination with the rapier loom braking system.

Description

Technical Field

[0001] The invention relates to the technical field of rapier looms, and in particular to a control method and system for a rapier loom with auxiliary braking of a main shaft motor. Background Art

[0002] The jacquard rapier loom can be used to weave fabrics of any color, and is often used to weave fabrics with patterned photos. As people's requirements for fabrics increase, the heads of jacquard looms have become larger and larger, and the number of needles has increased. The jacquard loom itself does not have power, and it uses the main shaft motor of the loom as the power source when it works. When the loom rotates one circle, there is a part of the angle that allows the jacquard loom to pull up the corresponding warp yarn. At this time, the loom is in the output state. When the warp yarn is pulled up, if the loom does not have the brake force to maintain this state, the loom will be dragged by the jacquard loom and pulled back to the state where all the warp yarns of the jacquard loom fall. There are two ways to install brakes on jacquard looms now, one is to install it on the vertical shaft of the jacquard loom, and the other is to install it behind the main shaft motor. Both methods will encounter the situation that the loom cannot brake at certain angles due to the large number of needles of the jacquard loom, and the warp yarn of the fabric is broken. Summary of the invention

[0003] One of the inventive purposes of the present invention is to provide a rapier loom control method and system with spindle motor assisted braking. The method and system, based on the original rapier loom's spindle motor and brake system, only controls the spindle motor to maintain zero speed current after stopping by setting software, thereby utilizing the spindle motor as the auxiliary braking function of the rapier loom, thereby achieving efficient braking of a large-head loom with multiple needles without adding new mechanical braking equipment, reducing the problem of the loom being unable to brake at certain angles and causing the warp yarn of the handlebar fabric to be broken, and also reducing the cost of the loom's brake system.

[0004] Another inventive object of the present invention is to provide a rapier loom control method and system with spindle motor assisted braking. The method and system also provide a current limiting 0-speed mode within a set time period after the loom stops, that is, the 0-speed current limiting mode of the spindle motor's maximum current is set by software, thereby avoiding the phenomenon of motor heating and damage due to excessive 0-speed current corresponding to the loom under different loads.

[0005] Another object of the present invention is to provide a rapier loom control method and system with spindle motor auxiliary brake, wherein the method and system utilize the original mechanical structure of the loom to perform auxiliary brake adjustment without the need for manual adjustment, thereby reducing labor costs.

[0006] In order to achieve at least one of the above-mentioned invention objects, the present invention further provides a rapier loom control method with auxiliary brake of a main shaft motor, the method comprising: Acquire the running status signal of the rapier loom, and determine whether the rapier loom currently stops running according to the running status signal of the rapier loom; After the stop status signal of the rapier loom is obtained, a braking control signal of the main shaft motor of the rapier loom is generated, so that the main shaft motor of the rapier loom enters a braking state; After the main shaft motor of the rapier loom enters the braking state, the rapier loom is controlled to perform a parking action, and it is determined whether the parking action of the current rapier loom is completed; If the current parking action of the rapier loom is completed, the spindle motor is further controlled to generate and maintain a reverse zero-speed current, so as to control the spindle motor to maintain a zero-speed state and perform auxiliary enhanced braking in combination with the rapier loom brake system.

[0007] According to one of the preferred embodiments of the present invention, the spindle motor includes a switched reluctance motor or a permanent magnet synchronous motor, and the switched reluctance motor or the permanent magnet synchronous motor includes a braking control module. The braking control module generates the braking control signal according to the stop operation status signal of the rapier loom, and executes the corresponding switched reluctance motor or permanent magnet synchronous motor stop braking according to the braking control signal.

[0008] According to another preferred embodiment of the present invention, the rapier loom includes a detection module. When the main shaft motor enters a braking state, the detection module detects and determines whether the current rapier loom has completed the shutdown action including the weft finding of the loom. The detection and judgment method of the weft finding of the loom by the detection module includes: judging whether the weft of the current loom is in a predetermined position and a predetermined tension range according to the weft tension sensor and the weft position sensor of the detection module; if so, judging that the current rapier loom has completed the shutdown action of the loom finding of the loom.

[0009] According to another preferred embodiment of the present invention, when the rapier loom completes the corresponding shutdown action, the braking control system of the rapier loom generates a 0-speed control signal, and generates a reverse 0-speed current in the coil of the spindle motor according to the 0-speed control signal; and the brake system judges according to the detection module that the rapier loom completes the shutdown action of the loom weft finding, and simultaneously starts the braking; the 0-speed current of the spindle motor coil provides an auxiliary braking force combined with the braking force of the brake system to maintain the jacquard machine of the rapier loom in its original position.

[0010] According to another preferred embodiment of the present invention, a 0-speed non-current-limiting mode control strategy and a 0-speed current-limiting mode control strategy of the spindle motor are preset, wherein a connection time between the 0-speed non-current-limiting mode control strategy and the 0-speed current-limiting mode control strategy is preset, and when the rapier loom completes the corresponding shutdown action, the 0-speed non-current-limiting mode control strategy is adopted within the connection time to generate a reverse 0-speed current in the coil of the spindle motor; and the 0-speed current-limiting mode control strategy is adopted outside the connection time to generate a reverse 0-speed current in the coil of the spindle motor, so as to control the temperature of the spindle motor.

[0011] According to another preferred embodiment of the present invention, the 0-speed current limiting mode control strategy includes: obtaining the normal operating temperature range of the rapier loom, obtaining the original 0-speed current of the spindle motor coil required for the different jacquard machines to maintain the original under different load conditions, and monitoring the temperature value of the spindle motor in real time; obtaining the corresponding 0-speed current of the spindle motor coil when the spindle motor meets the highest normal operating temperature as the maximum current in the 0-speed current limiting mode control strategy.

[0012] In order to achieve at least one of the above-mentioned invention purposes, the present invention further provides a rapier loom control system with a spindle motor assisted brake, and the system executes the above-mentioned rapier loom control method with a spindle motor assisted brake.

[0013] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the above-mentioned rapier loom control method with auxiliary braking of a main shaft motor.

[0014] The present invention also provides a rapier loom, which includes a control module, a spindle motor and a brake system. The rapier loom executes the above-mentioned rapier loom control method with spindle motor auxiliary braking through the control module, the spindle motor and the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a flow chart of a control method for a rapier loom with auxiliary braking of a main shaft motor according to the present invention.

[0016] Figure 2 Shown is a schematic diagram of the structural connection of an existing rapier loom motor and a brake system. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0018] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0019] Please combine Figure 1-Figure 2 The present invention discloses a control method and system for a rapier loom with auxiliary braking of a main shaft motor, the method comprising the following steps: first, the operation state of the rapier loom needs to be obtained according to the rapier loom control system, wherein the operation state includes stopping operation and normal operation, and the technical solution of the present invention needs to use the main shaft motor of the rapier loom to perform auxiliary braking when the rapier loom stops operation; wherein the rapier loom comprises a brake system, and the brake system provides the main brake for the rapier loom. The auxiliary brake of the main shaft motor and the main brake of the brake system can provide enhanced brake. After the rapier loom stops operation, the jacquard machine maintains the 0 speed state at the original position.

[0020] Specifically, the spindle motor includes a switched reluctance motor or a permanent magnet synchronous motor. The control modes of the above motors are different, and the corresponding brake control signals can be set separately. The present invention will not repeat them in detail. The switched reluctance motor or permanent magnet synchronous motor includes a brake control module, and the brake control module generates a brake control signal according to the stop state signal of the rapier loom, and executes the corresponding switched reluctance motor or permanent magnet synchronous motor stop brake according to the brake control signal. Figure 2 As shown, the brake control module of the switched reluctance motor or permanent magnet synchronous motor in the present invention can be installed behind the main shaft motor of the rapier loom, or installed on the vertical shaft of the main shaft motor. The above two installation methods are prior arts, and the present invention does not improve the installation position of the brake control module. The present invention only changes the control mode of the main shaft motor at the software level, so there is no need to change the existing brake control module, and there is no need to add a brake control module to improve the brake capacity of the rapier loom. Therefore, the improvement of the brake technology at the software level of the present invention has the technical effect of high efficiency, energy saving and environmental protection.

[0021] Furthermore, the rapier loom includes a detection module, which includes multiple sensors such as a weft tension sensor and a weft position sensor. The corresponding sensor data obtained by the detection module is used to determine the shutdown action of the current loom for finding the weft. When the main shaft motor enters a braking state, the detection module detects and determines whether the current rapier loom has completed the shutdown action including the weft finding of the loom. The detection and judgment method of the weft finding of the loom by the detection module includes: judging whether the weft of the current loom is in a predetermined position and a predetermined tension range according to the weft tension sensor and the weft position sensor of the detection module; if so, judging that the current rapier loom has completed the shutdown action of the loom for finding the weft. Specifically, the weft tension sensor and weft position sensor may include but are not limited to a full-bridge strain tension sensor and a weft photoelectric sensor, wherein the method for detecting weft tension data by the full-bridge strain tension sensor includes the following steps: detecting the voltage data of the weft tension by the full-bridge strain tension sensor, inputting the voltage data into a data acquisition and processing module, converting the voltage data into corresponding weft tension data by the data acquisition and processing module, and determining whether the weft tension data is within a reasonable range, if so, no longer starting the relevant weft tension adjustment device. The weft photoelectric sensor is used to detect the position of the weft, and the specific method includes: the photoelectric sensor senses the existence and position of the weft by emitting and receiving light. When the weft blocks the light, the sensor sends a signal indicating that the weft is in the correct position.

[0022] Furthermore, when the rapier loom completes the corresponding shutdown action, the braking control system of the rapier loom generates a 0-speed control signal, and generates a reverse 0-speed current in the coil of the spindle motor according to the 0-speed control signal, and the 0-speed current is used to maintain the jacquard machine of the rapier loom at its original position; and the brake system judges that the rapier loom completes the shutdown action of the loom finding weft according to the detection module, and simultaneously starts the braking; the 0-speed current of the spindle motor coil provides an auxiliary braking force combined with the braking force of the brake system to maintain the jacquard machine of the rapier loom at its original position.

[0023] In one of the preferred embodiments of the present invention, a 0-speed non-current-limiting mode control strategy and a 0-speed current-limiting mode control strategy of the spindle motor are preset, wherein a connection time between the 0-speed non-current-limiting mode control strategy and the 0-speed current-limiting mode control strategy is preset, and when the rapier loom completes the corresponding shutdown action, the 0-speed non-current-limiting mode control strategy is adopted within the connection time to generate a reverse 0-speed current in the coil of the spindle motor; and the 0-speed current-limiting mode control strategy is adopted outside the connection time to generate a reverse 0-speed current in the coil of the spindle motor, so as to control the temperature of the spindle motor. For example, the present invention sets the connection time to 3 seconds, that is, when the rapier loom completes the corresponding shutdown action, the 0-speed non-current limiting mode control strategy is immediately adopted to perform the auxiliary shutdown braking control of the spindle motor. At this time, the spindle motor coil current is relatively large, and the brake system of the rapier loom has not been started at this time. After 3 seconds, the 0-speed current limiting mode control strategy is immediately started, and the auxiliary braking of the spindle motor 0-speed current and the main braking of the brake system run at the same time. At this time, the 0-speed current of the spindle motor coil satisfies the preset maximum current, so the continuous temperature of the spindle motor will not exceed the preset maximum normal operating temperature.

[0024] The 0-speed current limiting mode control strategy includes: obtaining the normal operating temperature range of the rapier loom, obtaining the original 0-speed current of the spindle motor coil required for the different jacquard machines to maintain under different load conditions, and monitoring the temperature value of the spindle motor in real time; obtaining the corresponding 0-speed current of the spindle motor coil when the spindle motor meets the highest normal operating temperature as the maximum current in the 0-speed current limiting mode control strategy.

[0025] The embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. The embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part, and / or installed from a removable medium. When the computer program is executed by the central processing unit (CPU), the above-mentioned functions defined in the method of the present application are executed. It should be noted that the above-mentioned computer-readable medium of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, a system, device or device of an electrical, magnetic, optical, electromagnetic, infrared segment, or semiconductor, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection with one or more wire segments, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, electrical wire, optical cable, RF, etc., or any suitable combination of the foregoing.

[0026] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0027] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods of the present invention may be deformed or modified in any way.

Claims

1. A control method for a rapier loom with auxiliary brake of a main shaft motor, characterized in that: The method comprises: Acquire the running status signal of the rapier loom, and determine whether the rapier loom currently stops running according to the running status signal of the rapier loom; After the stop status signal of the rapier loom is obtained, a braking control signal of the main shaft motor of the rapier loom is generated, so that the main shaft motor of the rapier loom enters a braking state; After the main shaft motor of the rapier loom enters the braking state, the rapier loom is controlled to perform a parking action, and it is determined whether the parking action of the current rapier loom is completed; If the current parking action of the rapier loom is completed, the spindle motor is further controlled to generate and maintain a reverse zero-speed current, so as to control the spindle motor to maintain a zero-speed state and perform auxiliary enhanced braking in combination with the rapier loom brake system.

2. The control method of a rapier loom with a main shaft motor auxiliary brake according to claim 1, characterized in that: The spindle motor includes a switched reluctance motor or a permanent magnet synchronous motor, and the switched reluctance motor or the permanent magnet synchronous motor includes a braking control module. The braking control module generates the braking control signal according to the stop operation status signal of the rapier loom, and executes the corresponding switched reluctance motor or permanent magnet synchronous motor stop braking according to the braking control signal.

3. The control method of a rapier loom with a main shaft motor auxiliary brake according to claim 1, characterized in that: The rapier loom includes a detection module. When the main shaft motor enters a braking state, the detection module detects and determines whether the current rapier loom has completed the shutdown action including the weft finding of the loom. The detection module's detection and judgment method for the weft finding of the loom includes: judging whether the current weft of the loom is in a predetermined position and a predetermined tension range according to the weft tension sensor and the weft position sensor of the detection module; if so, judging that the current rapier loom has completed the shutdown action of the loom finding of the loom.

4. A rapier loom control method with spindle motor auxiliary brake according to claim 3, characterized in that: When the rapier loom completes the corresponding shutdown action, the brake control system of the rapier loom generates a 0-speed control signal, and generates a reverse 0-speed current in the coil of the spindle motor according to the 0-speed control signal; and the brake system judges that the rapier loom completes the shutdown action of the loom weft finding according to the detection module, and starts the brake at the same time; the 0-speed current of the spindle motor coil provides an auxiliary braking force combined with the brake force of the brake system to maintain the jacquard machine of the rapier loom in its original position.

5. The control method of a rapier loom with a main shaft motor auxiliary brake according to claim 1, characterized in that: The 0-speed non-current-limiting mode control strategy and the 0-speed current-limiting mode control strategy of the spindle motor are preset, wherein the connection time of the 0-speed non-current-limiting mode control strategy and the 0-speed current-limiting mode control strategy is preset, and when the rapier loom completes the corresponding shutdown action, the 0-speed non-current-limiting mode control strategy is adopted within the connection time to generate a reverse 0-speed current in the coil of the spindle motor; and the 0-speed current-limiting mode control strategy is adopted outside the connection time to generate a reverse 0-speed current in the coil of the spindle motor, so as to control the temperature of the spindle motor.

6. A control method for a rapier loom with a main shaft motor auxiliary brake according to claim 5, characterized in that: The 0-speed current limiting mode control strategy includes: obtaining the normal operating temperature range of the rapier loom, obtaining the original 0-speed current of the spindle motor coil required for the different jacquard machines to maintain under different load conditions, and monitoring the temperature value of the spindle motor in real time; obtaining the corresponding reverse 0-speed current of the spindle motor coil when the spindle motor meets the highest normal operating temperature as the maximum current in the 0-speed current limiting mode control strategy.

7. A rapier loom control system with spindle motor auxiliary brake, characterized in that: The system executes a rapier loom control method with spindle motor auxiliary brake as described in any one of claims 1-6.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement a rapier loom control method with a spindle motor auxiliary brake as described in any one of claims 1 to 6.

9. A rapier loom, characterized in that: The rapier loom comprises a control module, a spindle motor and a brake system. The rapier loom executes a rapier loom control method with spindle motor assisted braking as described in any one of claims 1 to 6 through the control module, the spindle motor and the brake system.

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