Automatic monitoring and alarming system for abnormal wire supply of needle roller

Abstract

The invention discloses an automatic monitoring and alarming system for abnormal filament supply of a needle roller, and the system comprises a speed collection module which comprises a first speed sensor disposed on a needle roller motor, a second speed sensor disposed on a filament return shaft, and a third speed sensor disposed on a needle roller shaft; the processing unit is electrically connected with the speed acquisition module; the processing unit receives an instruction speed set value output by the upper controller and converts the instruction speed set value into an instruction rotating speed; receiving a first speed signal, a second speed signal and a third speed signal; performing a first speed comparison, performing a second speed comparison, and performing a third speed comparison; when the difference value of the first speed comparison exceeds a preset threshold value, and / or the result of the second speed comparison exceeds a preset threshold value, and / or the result of the third speed comparison exceeds a preset threshold value, alarm information is generated. Alarm points can be visually seen, maintenance is accurate, and the stability of a cut tobacco supply system of the cigarette making machine and the production benefits of the cigarette making machine are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette making machines, and in particular to an automatic monitoring and alarm system for abnormal needle roller shred feeding. Background Art

[0002] A key component in a cigarette maker's tobacco feed mechanism is the needle roller. Its function is to remove tobacco from the metering trough. Its speed determines the rate of tobacco supply to the air chamber and the uniformity of the supply. Cigarette makers require a high level of tobacco supply uniformity. The needle roller is driven by a completely independent needle roller motor, which adjusts its speed based on the vehicle's current speed. The motor drives the mechanical transmission mechanism through its gears, providing the cigarette maker with the correct amount of tobacco to match the current speed.

[0003] Abnormal wire supply can lead to serious quality problems, such as unstable cigarette weight, excessive draw resistance, empty cigarettes, and sticky cigarettes. During equipment operation, abnormal wire supply can be caused by the needle roller stalling, toothed belt breaking, toothed belt falling, or transmission mechanism abnormalities. Due to the compact design of the equipment and the lack of electrical control system monitoring of the needle roller system's operating speed and speed ratio, the operation of the wire supply mechanism cannot be observed when these problems occur. Downtime is the only option, requiring inspection and maintenance of all parts of the wire supply mechanism. This not only reduces maintenance efficiency but also wastes significant maintenance costs. Summary of the Invention

[0004] In view of the above, the present invention aims to provide an automatic monitoring and alarm system for abnormal needle roller wire feeding to solve the above-mentioned technical problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] The present invention provides an automatic monitoring and alarm system for abnormal needle roller thread feeding, which is applied to a cigarette making machine. The cigarette making machine includes a host controller for outputting a command speed setting value, a needle roller motor, a thread return shaft driven by the needle roller motor through a transmission mechanism, and a needle roller shaft driven by the thread return shaft through a transmission belt. The system includes:

[0007] a speed acquisition module, the speed acquisition module comprising a first speed sensor provided on the needle roller motor, a second speed sensor provided on the wire reel, and a third speed sensor provided on the needle roller shaft, the first speed sensor being used to acquire an actual rotational speed of the needle roller motor to generate a first speed signal, the second speed sensor being used to acquire an actual rotational speed of the wire reel to generate a second speed signal, and the third speed sensor being used to acquire an actual rotational speed of the needle roller shaft to generate a third speed signal;

[0008] a processing unit, the processing unit being electrically connected to the speed acquisition module;

[0009] The processing unit is configured to:

[0010] receiving a command speed setting value output by the upper controller and converting the command speed setting value into a command speed;

[0011] receiving the first speed signal, the second speed signal, and the third speed signal;

[0012] performing a first speed comparison to compare the command speed with the first speed signal to determine the operating state of the needle roller motor;

[0013] performing a second speed comparison to compare the first speed signal with the second speed signal to determine an operating state of the transmission mechanism;

[0014] performing a third speed comparison, comparing the third speed signal with the second speed signal to determine the running state of the transmission belt;

[0015] When the difference of the first speed comparison exceeds a preset threshold, and / or when the result of the second speed comparison exceeds a preset threshold, and / or when the result of the third speed comparison exceeds a preset threshold, an alarm message is generated.

[0016] Optionally, the first speed sensor, the second speed sensor, and the third speed sensor are all synchronous wheel pulse detectors, which are respectively installed at the radial position of the synchronous wheel of the needle roller motor shaft head, the wire recycling shaft, and the needle roller shaft.

[0017] Optionally, the processing unit is a programmable logic controller;

[0018] The processing unit linearly converts the voltage signal of the command speed setting value into the command speed.

[0019] Optionally, the first speed comparison includes:

[0020] A synchronization rate is calculated according to the command speed and the actual speed of the needle roller motor. When the synchronization rate is lower than a preset synchronization rate threshold, it is determined that the operating state of the needle roller motor is abnormal.

[0021] Optionally, the second speed comparison includes:

[0022] A first speed ratio between an actual rotational speed of the needle roller motor and an actual rotational speed of the yarn return shaft is calculated, and when the first speed ratio is less than a preset reference speed ratio value, the operating state of the yarn return shaft is determined to be abnormal.

[0023] Optionally, performing a third speed comparison, comparing the third speed signal with the second speed signal, includes:

[0024] A second speed ratio between the actual rotational speed of the yarn waste shaft and the actual rotational speed of the needle roller shaft is calculated, and when the second speed ratio is less than a preset reference speed ratio value, it is determined that the operating state of the needle roller shaft is abnormal.

[0025] Optional, automatic monitoring and alarm system for abnormal needle roller wire feeding, including human-computer interaction interface;

[0026] The human-computer interaction interface is communicatively connected with the processing unit, and is used to display in real time the comparison curves and values ​​of the command speed, the actual speed of the needle roller motor, and the actual speed of the wire rewind shaft or the needle roller shaft, and when receiving the alarm information, it will issue an audible and visual alarm and prompt the fault point.

[0027] The present invention also provides a method for automatically monitoring and alarming abnormalities in needle roller wire feeding, which is applied to the system described above and comprises the following steps:

[0028] Collect the command speed value of the needle roller motor;

[0029] Collecting actual speed values ​​at at least three monitoring points along the power transmission path of the transmission mechanism, wherein the at least three monitoring points include a needle roller motor monitoring point, a wire rewind shaft monitoring point, and a needle roller monitoring point;

[0030] Performing a first speed comparison to compare the command speed value with an actual speed value collected at a monitoring point of the needle roller motor to determine an operating state of the needle roller motor;

[0031] Performing a second speed comparison to determine the operating state of the yarn reel based on an actual speed value collected at a monitoring point of the needle roller motor and an actual speed value collected at a monitoring point of the yarn reel;

[0032] performing a third speed comparison, performing a chain speed ratio analysis on the actual speed value collected at the needle roller monitoring point, the actual speed value collected at the needle roller motor monitoring point, and the actual speed value collected at the wire reel monitoring point, so as to determine the operating status of the transmission belt;

[0033] When the result of the first comparison or the result of the second comparison or the result of the third speed comparison indicates that an abnormality exists, an alarm signal is generated to indicate the abnormality.

[0034] The present invention further provides a computing device, comprising: a processor and a memory storing a computer program, wherein the computer program executes the method described above when executed by the processor.

[0035] The present invention also provides a computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute the method described above.

[0036] The above solution of the present invention includes at least the following beneficial effects:

[0037] The above-mentioned solution of the present invention includes: a speed acquisition module, the speed acquisition module includes a first speed sensor arranged on the needle roller motor, a second speed sensor arranged on the wire rewind shaft, and a third speed sensor arranged on the needle roller shaft, the first speed sensor is used to collect the actual rotation speed of the needle roller motor to generate a first speed signal, the second speed sensor is used to collect the actual rotation speed of the wire rewind shaft to generate a second speed signal, and the third speed sensor is used to collect the actual rotation speed of the needle roller shaft to generate a third speed signal; a processing unit, the processing unit is electrically connected to the speed acquisition module; the processing unit is used to: receive the command speed setting value output by the upper controller, and convert the command speed setting value into a value. The system converts the command speed into a command speed; receives the first speed signal, the second speed signal, and the third speed signal; performs a first speed comparison, comparing the command speed with the first speed signal to determine the operating status of the needle roller motor; performs a second speed comparison, comparing the first speed signal with the second speed signal to determine the operating status of the transmission mechanism; and performs a third speed comparison, comparing the third speed signal with the second speed signal to determine the operating status of the transmission belt. When the difference between the first speed comparison and / or the second speed comparison exceeds a preset threshold, and / or the third speed comparison exceeds a preset threshold, an alarm message is generated. The present invention monitors the operating speeds of the needle roller motor shaft, the yarn return shaft, and the needle roller shaft in real time, and designs a speed comparison program to determine the operating status of the three shafts. When an operation alarm is issued, the alarm point can be intuitively identified, enabling precise maintenance and improving the stability of the cigarette machine's yarn supply system and the machine's production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0039] Figure 1 This is a logic principle diagram of the automatic monitoring and alarm system for abnormal needle roller wire feeding provided by an embodiment of the present invention.

[0040] Figure 2 This is a flow chart of a method for automatically monitoring and alarming abnormal needle roller wire feeding provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] The present invention proposes an embodiment of an automatic monitoring and alarm system for abnormal needle roller wire feeding. Specifically, Figure 1 As shown, the system is applied to a cigarette making machine, the cigarette making machine including a host controller for outputting a command speed setting value, a needle roller motor, a wire reel driven by the needle roller motor through a transmission mechanism, and a needle roller shaft driven by the wire reel through a transmission belt. The system includes:

[0043] a speed acquisition module, the speed acquisition module comprising a first speed sensor provided on the needle roller motor, a second speed sensor provided on the wire reel, and a third speed sensor provided on the needle roller shaft, the first speed sensor being used to acquire an actual rotational speed of the needle roller motor to generate a first speed signal, the second speed sensor being used to acquire an actual rotational speed of the wire reel to generate a second speed signal, and the third speed sensor being used to acquire an actual rotational speed of the needle roller shaft to generate a third speed signal;

[0044] a processing unit, the processing unit being electrically connected to the speed acquisition module;

[0045] The processing unit is configured to:

[0046] receiving a command speed setting value output by the upper controller and converting the command speed setting value into a command speed;

[0047] receiving the first speed signal, the second speed signal, and the third speed signal;

[0048] performing a first speed comparison to compare the command speed with the first speed signal to determine the operating state of the needle roller motor;

[0049] performing a second speed comparison to compare the first speed signal with the second speed signal to determine an operating state of the transmission mechanism;

[0050] performing a third speed comparison, comparing the third speed signal with the second speed signal to determine the running state of the transmission belt;

[0051] When the difference of the first speed comparison exceeds a preset threshold, and / or when the result of the second speed comparison exceeds a preset threshold, and / or when the result of the third speed comparison exceeds a preset threshold, an alarm message is generated.

[0052] In this embodiment, a synchronous wheel pulse detector is installed radially on the synchronous wheel of each of the needle roller motor shaft, the yarn return shaft, and the needle roller shaft. This detector monitors the operating speed of these three shafts and transmits the information to a program in the upper-level controller (PLC) for monitoring. The installation of the sensor does not alter the original structure of the needle roller drive system, and the added mechanism does not hinder normal assembly, disassembly, and maintenance of the needle roller drive system. The PLC receives speed signals from the needle roller motor shaft, the yarn return shaft, and the needle roller shaft, as well as the device connection model number, and outputs alarm and control signals.

[0053] A new touchscreen human-machine interface (HMI) was installed on the original cigarette making machine. The HMI displays real-time needle roller speed and alarm functions. Monitoring data is transmitted to the HMI via communication, and the HMI page displays a comparison curve and numerical values ​​of the sampled values ​​in real time. In the event of a fault, external sound and light alarms are displayed simultaneously on the HMI page. The HMI also indicates the fault point and cause, and historical fault information can be retrieved.

[0054] The system can also set a critical deviation window for the sampled data comparison value based on the detection sampling value. The window deviation value can be set and adjusted. According to the sampling comparison analysis, small deviations are analyzed to provide early warning of abnormal conditions at the fault point, and a prominent reminder is displayed on the HMI. Electrical, mechanical maintenance personnel or even car operators can use the early warning reminder to check, maintain and repair related parts in advance during maintenance and parking, so as to eliminate potential fault hazards in advance.

[0055] The upper controller is programmed with a control program and a touch screen configuration program. The control program sets a speed comparison algorithm, converts the speed signals of the needle roller motor shaft head, the wire return shaft, and the needle roller shaft, and sets speed limits and alarm values, and finally outputs a speed curve and alarm information.

[0056] Based on the electrical control principles of cigarette making machines, the original control prototype (RCP) sets the speed setpoint for the needle roller motor, also known as the command speed setpoint SW. This setpoint is proportional to the production rate of the cigarette making machine. The speed pulses of the command speed setpoint SW, the actual speed B2 of the needle roller motor, the actual speed B1 of the backspin shaft, and the actual speed B0 of the needle roller shaft are input into the upper controller for comparison. The command speed setpoint SW and the actual speed B2 of the needle roller motor are compared with the actual speed B0 of the needle roller shaft. The two speeds are proportional. A window speed difference is set to determine the execution of the actual speed of the needle roller motor and thus whether the needle roller motor has stalled or malfunctioned. The actual speed B2 of the needle roller motor is compared with the actual speed B1 of the backspin shaft, and the actual speed B1 of the backspin shaft is compared with the actual speed B0 of the needle roller shaft. The two speeds are proportional and the ratio is constant. By comparing the difference between the two, damage or malfunction of the intermediate transmission link can be determined.

[0057] Monitoring data is transmitted to the HMI via communication, and the HMI page displays the comparison curve and numerical values ​​of the sampled values ​​in real time. When a fault occurs, external sound and light alarms are displayed simultaneously on the HMI page. The HMI also indicates the fault location and cause, and historical faults can be queried. The system can also set a critical deviation window for the sampled data comparison value based on the detection sampling value. The window deviation value can be set and adjusted. Based on the analysis of small deviations in the sampling comparison, it can provide early warning of abnormal conditions at the fault point and a prominent prompt on the HMI. Electrical and mechanical maintenance personnel, or even the vehicle operator, can use this warning to preemptively inspect, maintain, and repair relevant parts during maintenance stops, thereby eliminating potential faults in advance.

[0058] This embodiment also provides a method for automatically monitoring and alarming abnormalities in needle roller wire feeding, which is applied to the system described above and includes the following steps:

[0059] Step S1, collecting the command speed value of the needle roller motor;

[0060] Step S2, collecting actual speed values ​​of at least three monitoring points along the power transmission path of the transmission mechanism, wherein the at least three monitoring points include a needle roller motor monitoring point, a wire reel monitoring point, and a needle roller monitoring point;

[0061] Step S3, performing a first speed comparison, comparing the command speed value with the actual speed value collected at the needle roller motor monitoring point to determine the operating state of the needle roller motor;

[0062] Step S4, performing a second speed comparison, and determining the operating state of the silk reel based on the actual speed value collected at the needle roller motor monitoring point and the actual speed value collected at the silk reel monitoring point;

[0063] Step S5, performing a third speed comparison, performing a chain speed ratio analysis on the actual speed value collected at the needle roller monitoring point, the actual speed value collected at the needle roller motor monitoring point, and the actual speed value collected at the wire reel monitoring point, to determine the operating status of the transmission belt;

[0064] Step S6: When the result of the first comparison, the result of the second comparison, or the result of the third speed comparison indicates that an abnormality exists, an alarm signal is generated to indicate the abnormality.

[0065] In this embodiment, in order to realize speed monitoring and speed difference comparison between each axis, the processing unit first linearly converts the voltage signal of the command speed setting value into the command speed SW, and uses the command speed as the target value for tracking and comparing the operating speed of the needle roller motor. The formula for converting the command speed SW from the voltage value is as follows:

[0066] = ;

[0067] in, is the rotation speed, is the voltage input value, is the upper limit for the output value, is the lower limit of the output value, The upper limit is the input value, The lower limit is the input value.

[0068] Then, the synchronous wheel pulse detector collects the synchronous wheel pulses of the needle roller motor, the wire return shaft, and the needle roller shaft, and converts the pulses into actual speed values.

[0069] Specifically, the M method speed measurement principle is used. Within a certain time period Tc, the number of pulses M1 output by the synchronous wheel of the measuring shaft is used to calculate the speed. For example, when the needle roller motor rotates one circle, the number of teeth on the synchronous wheel is Z. The number of pulses P generated by the motor during one rotation detected by the sensor is the number of teeth Z. The number of pulses generated by the sensor during the specified time interval Tc is M1, so the motor speed per minute n=60 (r / min).

[0070] The command speed SW of the needle roller motor is derived from the frequency of the RCP. This set value is provided by the host PLC and is positively correlated with the production rate of the cigarette making machine. Therefore, when the cigarette making machine is running, the command speed needs to be calibrated in the synchronous speed range first. Appropriate upper and lower limits are set through the HMI. By setting the upper limit, the converted SW speed (rotation speed) value is equal to the motor speed value. At this point, the calibration of the command speed and the synchronous speed of the needle roller motor is completed.

[0071] The motor speed is measured as Mn by the above method, and the command speed is SW. Then the synchronization rate between the motor and the command speed is = When the two speeds are completely synchronized, the synchronization rate is 100%. If the motor speed is lower than the command speed due to carbon brush problems or other mechanical reasons, the synchronization rate will be lower than 100%. The synchronization rate threshold is set to 99.8%. When the synchronization rate falls below 99.8%, the operating status is considered abnormal, and a fault alarm will pop up on the human-machine interface. The synchronous speed of the needle roller motor and the over-limit alarm will be displayed in real time, and the fault status information will be promptly communicated to the machine operator.

[0072] In the specific judgment process, the speed synchronization rate is judged in the order of the needle roller motor, the wire rewind shaft, and the needle roller shaft.

[0073] First, the synchronization rate between the command speed and the actual speed of the needle roller motor is calculated. When the synchronization rate is lower than the preset synchronization rate threshold, the operating state of the needle roller motor is judged to be abnormal and the needle roller motor needs to be repaired.

[0074] Then calculate the first speed ratio between the actual speed of the needle roller motor and the actual speed of the silk return shaft. When the first speed ratio is less than the preset reference speed ratio value, it is judged that the operating state of the silk return shaft is abnormal, and the transmission mechanism between the needle roller motor and the silk return shaft needs to be repaired.

[0075] Finally, the second speed ratio between the actual speed of the wire return shaft and the actual speed of the needle roller shaft is calculated. When the second speed ratio is less than the preset reference speed ratio value, the operating status of the needle roller shaft is judged to be abnormal, and the conveyor belt between the wire return shaft and the needle roller shaft needs to be repaired.

[0076] The speed ratio here is calculated in the same way as the synchronization rate above, so it will not be repeated here.

[0077] The present invention's automatic monitoring and alarm system and method for needle roller thread feed anomalies utilizes real-time monitoring of the rotational speeds of the needle roller motor, thread return shaft, and needle roller shaft, along with a speed comparison program and front-end display interface. The program determines the operating conditions of the three axes and displays their respective operating curves, parameter settings, and alarm status on the front-end interface. When an operational alarm is issued, the alarm point is intuitively visible, enabling precise repairs and improving the stability of the cigarette machine thread feed system and the production efficiency of the cigarette maker.

[0078] An embodiment of the present invention further provides a computing device comprising: a processor and a memory storing a computer program, wherein the computer program, when executed by the processor, performs the method described in the above embodiment. All implementations of the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0079] The present invention also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to execute the method described in the above embodiment. All implementations of the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0080] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0081] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0082] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0083] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0084] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0085] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, ROM, RAM, a magnetic disk, or an optical disk.

[0086] In addition, it should be pointed out that in the apparatus and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. Moreover, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but they do not necessarily need to be performed in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the method and apparatus of the present invention can be implemented in hardware, firmware, software or a combination thereof in any computing device (including a processor, storage medium, etc.) or a network of computing devices. This can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0087] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general-purpose device. Therefore, the purpose of the present invention can also be achieved simply by providing a program product containing program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but do not necessarily need to be performed in chronological order. Certain steps can be performed in parallel or independently of each other.

[0088] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An automatic monitoring and alarm system for abnormal needle roller wire feeding, characterized in that: Applied to a cigarette making machine, the cigarette making machine includes a host controller for outputting a command speed setting value, a needle roller motor, a wire reel driven by the needle roller motor through a transmission mechanism, and a needle roller shaft driven by the wire reel through a transmission belt. The system includes: a speed acquisition module, the speed acquisition module comprising a first speed sensor provided on the needle roller motor, a second speed sensor provided on the wire reel, and a third speed sensor provided on the needle roller shaft, the first speed sensor being used to acquire an actual rotational speed of the needle roller motor to generate a first speed signal, the second speed sensor being used to acquire an actual rotational speed of the wire reel to generate a second speed signal, and the third speed sensor being used to acquire an actual rotational speed of the needle roller shaft to generate a third speed signal; a processing unit, the processing unit being electrically connected to the speed acquisition module; The processing unit is configured to: receiving a command speed setting value output by the upper controller and converting the command speed setting value into a command speed; receiving the first speed signal, the second speed signal, and the third speed signal; performing a first speed comparison to compare the command speed with the first speed signal to determine the operating state of the needle roller motor; performing a second speed comparison to compare the first speed signal with the second speed signal to determine an operating state of the transmission mechanism; performing a third speed comparison, comparing the third speed signal with the second speed signal to determine the running state of the transmission belt; When the difference of the first speed comparison exceeds a preset threshold, and / or when the result of the second speed comparison exceeds a preset threshold, and / or when the result of the third speed comparison exceeds a preset threshold, an alarm message is generated.

2. The system according to claim 1, wherein: The first speed sensor, the second speed sensor and the third speed sensor are all synchronous wheel pulse detectors, which are respectively installed at the radial position of the synchronous wheel of the needle roller motor shaft head, the wire recycling shaft and the needle roller shaft.

3. The needle roller wire feeding abnormality automatic monitoring and alarm system according to claim 1 is characterized in that: The processing unit is a programmable logic controller; The processing unit linearly converts the voltage signal of the command speed setting value into the command speed.

4. The needle roller wire feeding abnormality automatic monitoring and alarm system according to claim 1 is characterized in that: The first speed comparison includes: A synchronization rate is calculated according to the command speed and the actual speed of the needle roller motor. When the synchronization rate is lower than a preset synchronization rate threshold, it is determined that the operating state of the needle roller motor is abnormal.

5. The needle roller wire feeding abnormality automatic monitoring and alarm system according to claim 1 is characterized in that: The second speed comparison includes: A first speed ratio between an actual rotational speed of the needle roller motor and an actual rotational speed of the yarn return shaft is calculated, and when the first speed ratio is less than a preset reference speed ratio value, the operating state of the yarn return shaft is determined to be abnormal.

6. The needle roller wire feeding abnormality automatic monitoring and alarm system according to claim 1 is characterized in that: Performing a third speed comparison, comparing the third speed signal with the second speed signal, comprises: A second speed ratio between the actual rotational speed of the yarn waste shaft and the actual rotational speed of the needle roller shaft is calculated, and when the second speed ratio is less than a preset reference speed ratio value, it is determined that the operating state of the needle roller shaft is abnormal.

7. The needle roller wire feeding abnormality automatic monitoring and alarm system according to claim 1 is characterized in that: It also includes human-computer interaction interface; The human-computer interaction interface is communicatively connected with the processing unit, and is used to display in real time the comparison curves and values ​​of the command speed, the actual speed of the needle roller motor, and the actual speed of the wire rewind shaft or the needle roller shaft, and when receiving the alarm information, it will issue an audible and visual alarm and prompt the fault point.

8. A method for automatically monitoring and alarming abnormalities in needle roller wire feeding, applied to the system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Collect the command speed value of the needle roller motor; Collecting actual speed values ​​at at least three monitoring points along the power transmission path of the transmission mechanism, wherein the at least three monitoring points include a needle roller motor monitoring point, a wire rewind shaft monitoring point, and a needle roller monitoring point; Performing a first speed comparison to compare the command speed value with an actual speed value collected at a monitoring point of the needle roller motor to determine an operating state of the needle roller motor; Performing a second speed comparison to determine the operating state of the yarn reel based on an actual speed value collected at a monitoring point of the needle roller motor and an actual speed value collected at a monitoring point of the yarn reel; performing a third speed comparison, performing a chain speed ratio analysis on the actual speed value collected at the needle roller monitoring point, the actual speed value collected at the needle roller motor monitoring point, and the actual speed value collected at the wire reel monitoring point, so as to determine the operating status of the transmission belt; When the result of the first speed comparison, and / or the result of the second speed comparison, and / or the result of the third speed comparison indicates that an abnormality exists, an alarm signal is generated to indicate the abnormality.

9. A computing device, characterized in that include: A processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method according to any one of claims 1 to 7 is performed.

10. A computer-readable storage medium, characterized in that: The device stores instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 1 to 7.

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