Abnormal sound recognition method, device and system of numerical control machine tool and numerical control machine tool

Abstract

The invention relates to an abnormal sound recognition method, device and system for a numerical control machine tool and the numerical control machine tool. The method comprises the steps that a first sound signal and a second sound signal are acquired; wherein the first sound signal is recorded inside a workbench of the numerical control machine tool, the second sound signal is recorded outside the workbench of the numerical control machine tool, and a safety door is arranged on the numerical control machine tool to divide the workbench of the numerical control machine tool into independent spaces; processing the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the numerical control machine tool; identifying whether the third sound signal is an abnormal sound signal; and under the condition that the third sound signal is the abnormal sound signal, abnormal sound of the numerical control machine tool is determined. Through the method provided by the invention, the technical problem that an operator is difficult to recognize abnormal sound of the numerical control machine tool in time due to the influence of field noise is solved.

Description

Technical Field

[0001] The present application relates to the field of numerically controlled machine tools, and in particular to a method, device and system for identifying abnormal noise of numerically controlled machine tools, and a numerically controlled machine tool. Background Art

[0002] CNC machine tools are the core of industry and undertake the processing and production tasks of various industrial products. They cut raw materials through high-speed rotating tools, so that the remaining parts of the materials are changed into predetermined shapes, thereby obtaining various devices with consistent sizes. Operators operate the CNC system of CNC machine tools by writing codes or pressing keys to drive CNC machine tools to work according to the expected actions.

[0003] However, due to operator inattention, fatigue, unintentional key presses, etc., examples of CNC machine tool errors are a very common phenomenon. When CNC machine tools are operated incorrectly, they are usually accompanied by abnormal noises.

[0004] However, CNC machine tools are usually set up in relatively noisy factory scenes. When a CNC machine tool makes an abnormal noise due to incorrect operation, the operator may be affected by the on-site noise and unable to hear the abnormal noise in time, making it difficult for the operator to realize that the current CNC machine tool has an incorrect operation at the first time. Summary of the invention

[0005] The present application provides a method, device and system for identifying abnormal noise of a CNC machine tool, and a CNC machine tool, so as to solve the technical problem that it is difficult for operators to timely identify the abnormal noise of the CNC machine tool due to the influence of on-site noise.

[0006] In a first aspect, the present application provides a method for identifying abnormal noise of a CNC machine tool, the method comprising:

[0007] Acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside the workbench of the CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and the CNC machine tool is provided with a safety door to divide the workbench of the CNC machine tool into independent spaces;

[0008] Processing the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool;

[0009] identifying whether the third sound signal is an abnormal sound signal;

[0010] When the third sound signal is the abnormal sound signal, it is determined that the CNC machine tool generates an abnormal sound.

[0011] In a feasible embodiment of the present application, processing the first sound signal and the second sound signal to determine a third sound signal includes:

[0012] aligning the first sound signal with the second sound signal in time;

[0013] Marking a plurality of sampling points on the first sound signal;

[0014] The first sound signal is differentially subtracted from the second sound signal at each sampling point to obtain the third sound signal.

[0015] In a feasible embodiment of the present application, identifying whether the third sound signal is an abnormal sound signal includes:

[0016] Get the preset sound processing model;

[0017] Inputting the third sound signal into the sound processing model to obtain an output result of the sound processing model; wherein the output result is an abnormal sound result or a normal sound result;

[0018] Identify whether the third sound signal is the abnormal sound signal according to the output result; wherein, if the output result is the abnormal sound result, identify the third sound signal as the abnormal sound signal, and if the output result is the normal sound result, identify the third sound signal as not the abnormal sound signal.

[0019] In a feasible embodiment of the present application, after determining that the CNC machine tool has an abnormal sound, the method further includes:

[0020] Determining the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information;

[0021] Generate fault type information corresponding to the fault type according to the fault type; and / or,

[0022] According to the fault type, the numerically controlled machine tool is controlled to perform fault processing corresponding to the fault type.

[0023] In a feasible embodiment of the present application, determining the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information includes:

[0024] Acquire a historical operation log of the CNC machine tool; wherein the historical operation log is an operation log of the CNC machine tool within a preset time period before the moment when the abnormal sound of the CNC machine tool is identified;

[0025] Acquiring the third sound information within the preset time period;

[0026] Generate an abnormal record log according to the historical operation log and the third sound information within the preset time period;

[0027] The fault type of the fault causing the abnormal noise of the numerically controlled machine tool is determined according to the abnormal record log.

[0028] In a feasible embodiment of the present application, controlling the CNC machine tool to perform fault processing corresponding to the fault type according to the fault type includes:

[0029] When the fault type is a first fault type, the CNC machine tool is controlled to stop; wherein the first fault type is a collision fault of the CNC machine tool;

[0030] When the fault type is the second fault type, a prompt message is generated, and the CNC machine tool is controlled to play the prompt message; wherein, the second fault type is other faults occurring in the CNC machine tool except for the collision fault.

[0031] In a second aspect, the present application provides an abnormal sound recognition device for a CNC machine tool, the device comprising:

[0032] an acquisition module, configured to acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside the workbench of the CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and the CNC machine tool is provided with a safety door to divide the workbench of the CNC machine tool into independent spaces;

[0033] A processing module, configured to process the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool;

[0034] an identification module, used to identify whether the third sound signal is an abnormal sound signal;

[0035] The first determination module is used to determine that the CNC machine tool has an abnormal sound when the third sound signal is the abnormal sound signal.

[0036] In a third aspect, an embodiment of the present application provides an abnormal sound recognition system for a CNC machine tool, characterized in that the system includes a first sound collection device, a second sound collection device, and a control mainboard;

[0037] The first sound collecting device is arranged at a first position of the CNC machine tool, and is used to collect a first sound signal. The second sound collecting device is arranged at a second position of the CNC machine tool, and is used to collect a second sound signal. A safety door is arranged on the CNC machine tool to isolate the working table of the CNC machine tool from the external environment. The first position is any position on the CNC machine tool inside the safety door, and the second position is any position on the CNC machine tool outside the safety door.

[0038] The control mainboard is connected to the first sound collection device and the second sound collection device respectively, and the control mainboard is used to execute the abnormal sound method of a CNC machine tool as described in any one of the embodiments of the first aspect above.

[0039] In a feasible embodiment of the present application, the system further includes a display device and a prompt device, and the display device and the prompt device are both connected to the control mainboard;

[0040] The display device is used to display fault type information when the CNC machine tool generates an abnormal sound; wherein the fault type information is used to describe the fault type of the fault that causes the CNC machine tool to generate an abnormal sound;

[0041] The prompt device is used to play a prompt message when the CNC machine tool generates an abnormal sound; wherein the prompt message is used to prompt to handle the fault that causes the abnormal sound of the CNC machine tool.

[0042] In a fourth aspect, an embodiment of the present application provides a CNC machine tool, which includes the abnormal sound recognition system for the CNC machine tool as described in any one of the embodiments of the third aspect above.

[0043] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0044] In the technical solution provided in the embodiment of the present application, a first sound signal and a second sound signal are obtained, the first sound signal is recorded inside the workbench of a CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and a safety door is provided on the CNC machine tool to divide the workbench of the CNC machine tool into independent spaces; the first sound signal and the second sound signal are processed to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool; it is identified whether the third sound signal is an abnormal sound signal; and when the third sound signal is an abnormal sound signal, it is determined that an abnormal sound occurs in the CNC machine tool.

[0045] Through the technical solution provided by the embodiment of the present application, the first sound signal recorded inside the workbench of the CNC machine tool contains both external noise and the working sound of the CNC machine tool, but the external noise is small and the working sound is large. The second sound signal recorded outside the workbench of the CNC machine tool also contains both external noise and the working sound of the CNC machine tool, but the external noise is large and the working sound is small. By processing the first sound signal and the second sound signal, a third sound signal containing only the working sound of the CNC machine tool as much as possible is obtained, and by analyzing the third sound signal, it is determined whether the CNC machine tool has an abnormal sound. In this way, the influence of external noise is eliminated. Even if the operator is affected by the on-site noise and cannot hear the abnormal sound in time, it can be automatically identified whether the CNC machine tool has an abnormal sound based on the pure working sound of the CNC machine tool, which solves the technical problem that the operator is difficult to identify the abnormal sound of the CNC machine tool in time due to the influence of on-site noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0048] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0049] Figure 1 A schematic diagram of a flow chart of a method for identifying abnormal noise of a CNC machine tool provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the structure of an abnormal sound recognition device for a CNC machine tool provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of the structure of an abnormal sound recognition system for a CNC machine tool provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of the structure of a CNC machine tool provided in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 1. First sound collection device; 2. Second sound collection device; 3. Control main board; 4. Display device; 5. Prompt device; 6. Safety door; 7. Workbench; 8. CNC machine tool; 201. Acquisition module; 202. Processing module; 203. Identification module; 204. First determination module. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0057] In order to solve the technical problem in the prior art that it is difficult for operators to promptly identify abnormal noises of CNC machine tools due to the influence of on-site noise, the present application provides a method, device and system for identifying abnormal noises of CNC machine tools, and a CNC machine tool, which can automatically identify whether the CNC machine tool has abnormal noises based on the pure working sound of the CNC machine tool, thereby solving the technical problem that it is difficult for operators to promptly identify abnormal noises of CNC machine tools due to the influence of on-site noise.

[0058] Figure 1 A flow chart of a method for identifying abnormal sound of a CNC machine tool provided in an embodiment of the present application, referring to Figure 1 The abnormal sound recognition method of a CNC machine tool provided in the embodiment of the present application specifically comprises the following steps:

[0059] S1: Acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside a workbench of a CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool;

[0060] Specifically, a first sound signal and a second sound signal are obtained, wherein the first sound signal is recorded inside a workbench of a numerically controlled machine tool, and the second sound signal is recorded outside the workbench of the numerically controlled machine tool.

[0061] In a CNC machine tool, a safety door is provided to isolate a workbench into an independent space, a first sound collecting device is provided inside the safety door to record a first sound signal, and a second sound collecting device is provided outside the safety door to record a second sound signal.

[0062] In some specific examples, the first sound collecting device and the second sound collecting device may both be microphones.

[0063] S2: Processing the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool;

[0064] Specifically, the first sound signal and the second sound signal actually contain both external noise and the working sound of the CNC machine tool. If the first sound signal and the second sound signal are directly used for abnormal sound recognition, the recognition result will be inaccurate due to the influence of external noise. Therefore, the first sound signal and the second sound signal are further processed to determine the third sound signal.

[0065] In a feasible embodiment of the present application, the first sound signal and the second sound signal are processed to determine the third sound signal, including:

[0066] aligning the first sound signal with the second sound signal in time;

[0067] Marking a plurality of sampling points on the first sound signal;

[0068] The first sound signal is differentially subtracted from the second sound signal at each sampling point to obtain a third sound signal.

[0069] Specifically, the first sound signal and the second sound signal are aligned in time according to their recording time axes; after the alignment of the first sound signal and the second sound signal is completed, a plurality of sampling points are marked on the first sound signal, where the sampling point is any time node on the first sound signal; the first sound signal and the second sound signal are differentially subtracted at each sampling point to obtain a third sound signal.

[0070] It can be understood that processing the first sound signal and the second sound signal to obtain the third sound signal is actually to perform noise reduction processing on the first sound signal with reference to the second sound signal in which the external noise accounts for a larger proportion. After the first sound signal and the second sound signal are differentially subtracted, at any sampling point, the first sound signal filters out the external noise, so that the obtained third sound signal contains only the working sound of the CNC machine tool as much as possible.

[0071] In a feasible embodiment of the present application, the first sound signal and the second sound signal may be processed based on a hybrid active noise reduction algorithm to obtain a third sound signal.

[0072] Specifically, after acquiring the first sound signal and the second sound signal, an anti-phase signal having a phase opposite to that of the external noise included in the first sound signal is generated according to the first sound signal and the second sound signal, and the anti-phase signal is synthesized with the first sound signal to obtain a third sound signal.

[0073] S3: Identify whether the third sound signal is an abnormal sound signal;

[0074] Specifically, the obtained third sound signal only contains the working sound of the numerically controlled machine tool, and the third sound signal is identified to identify whether the third sound signal is an abnormal sound signal.

[0075] In a feasible embodiment of the present application, identifying whether the third sound signal is an abnormal sound signal includes:

[0076] Get the preset sound processing model;

[0077] Inputting the third sound signal into the sound processing model to obtain an output result of the sound processing model; wherein the output result is an abnormal sound result or a normal sound result;

[0078] Identify whether the third sound signal is an abnormal sound signal according to the output result; wherein, if the output result is an abnormal sound result, identify the third sound signal as an abnormal sound signal, and if the output result is a normal sound result, identify the third sound signal as not an abnormal sound signal.

[0079] Specifically, a sound processing model is obtained. The sound processing model has been trained in advance. For an input sound signal, the sound processing model can identify whether the sound signal is a normal sound and output a corresponding output result.

[0080] When training the sound processing model, technicians collect multiple sound signals from CNC machine tools, mark the sound signals collected when the CNC machine tools fail as abnormal sound signals, and mark the sound signals collected when the CNC machine tools operate normally as normal sound signals, and use these sound signals as training sets to train the sound processing model.

[0081] As an example, the sound processing model can be a model constructed based on machine learning, neural network, etc. The specific structure of the sound processing model is a prior art and will not be described in detail here.

[0082] The third sound signal is input into the sound processing model, and an output result of the sound processing model is obtained, where the output result is an abnormal sound result or a normal sound result. If the output result is an abnormal sound result, the third sound signal is identified as an abnormal sound signal, and if the output result is a normal sound result, the third sound signal is identified as not an abnormal sound signal.

[0083] S4: When the third sound signal is an abnormal sound signal, it is determined that the CNC machine tool generates an abnormal sound.

[0084] Through the technical solution provided by the embodiment of the present application, the first sound signal recorded inside the workbench of the CNC machine tool contains both external noise and the working sound of the CNC machine tool, but the external noise is small and the working sound is large. The second sound signal recorded outside the workbench of the CNC machine tool also contains both external noise and the working sound of the CNC machine tool, but the external noise is large and the working sound is small. By processing the first sound signal and the second sound signal, a third sound signal containing only the working sound of the CNC machine tool as much as possible is obtained, and by analyzing the third sound signal, it is determined whether the CNC machine tool has an abnormal sound. In this way, the influence of external noise is eliminated. Even if the operator is affected by the on-site noise and cannot hear the abnormal sound in time, it can be automatically identified whether the CNC machine tool has an abnormal sound based on the pure working sound of the CNC machine tool, which solves the technical problem that the operator is difficult to identify the abnormal sound of the CNC machine tool in time due to the influence of on-site noise.

[0085] After realizing automatic recognition of abnormal noise of CNC machine tools, in order to identify the specific cause of abnormal noise of CNC machine tools and prompt the operator in time, in a feasible embodiment of the present application, after determining that abnormal noise occurs in CNC machine tools, the method further includes:

[0086] determining the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information;

[0087] Generate fault type information corresponding to the fault type according to the fault type; and / or,

[0088] According to the fault type, the CNC machine tool is controlled to perform fault processing corresponding to the fault type.

[0089] Specifically, after determining that the CNC machine tool has an abnormal sound, the fault type of the fault causing the abnormal sound of the CNC machine tool is determined according to the third sound information, the CNC machine tool is controlled to perform corresponding fault processing based on the fault type, and fault type information corresponding to the fault type is generated.

[0090] The fault type information is used to describe the fault type of the fault that causes the abnormal noise of the CNC machine tool. In a feasible embodiment of the present application, after the fault type information corresponding to the fault type is generated, the fault type information is displayed.

[0091] In some specific examples, the fault type information may be displayed on a display device provided on the CNC machine tool, for example, the fault type information may be displayed on a display screen provided on the CNC machine tool.

[0092] Fault handling is used to enable the CNC machine tool to take action on the fault that causes the CNC machine tool to make abnormal noise. In a feasible embodiment of the present application, fault handling can be implemented through a preset fault handling program.

[0093] After the fault type causing the abnormal noise of the CNC machine tool is determined, a fault handling program corresponding to the fault type is searched in the fault handling program list, and the fault handling program is run to control the CNC machine tool to perform fault handling corresponding to the fault type.

[0094] In a feasible embodiment of the present application, determining the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information includes:

[0095] Obtaining a historical operation log of the CNC machine tool; wherein the historical operation log is an operation log of the CNC machine tool within a preset time period before the moment when the abnormal sound of the CNC machine tool is identified;

[0096] Acquiring third sound information within a preset time period;

[0097] Generate an abnormal record log based on the historical operation log and the third sound information within a preset time period;

[0098] Determine the fault type that causes abnormal noise in the CNC machine tool based on the abnormal record log.

[0099] Specifically, the historical operation log is the operation log of the CNC machine tool within the preset time period before the abnormal noise occurs. The historical operation log records the operation status and parameters of the CNC machine tool within the preset time period, such as machine mode, execution code file name, execution action, etc.

[0100] As an example, the operation log may be obtained from the NC code instructions of the CNC machine tool; as an example, the preset time period may be set to 10 minutes.

[0101] The third sound information and the historical operation log within the preset time period are recorded to obtain an abnormal record log. In a feasible embodiment of the present application, since the time when the abnormal sound occurs in the CNC machine tool is known, the execution code at the time when the abnormal sound occurs in the CNC machine tool, the execution action at the time when the abnormal sound occurs in the CNC machine tool, and other information can be determined from the historical operation log, and this information is recorded as part of the abnormal record log.

[0102] The fault type of the fault that causes the abnormal noise in the CNC machine tool is determined according to the abnormal record log. In a feasible embodiment of the present application, the abnormal record log contains abnormal operation information, such as the execution code at the time when the CNC machine tool makes an abnormal noise as described in the above embodiment, the execution action at the time when the CNC machine tool makes an abnormal noise, etc. Based on the analysis of the abnormal operation information, the fault type of the fault that causes the abnormal noise in the CNC machine tool is determined.

[0103] In a feasible embodiment of the present application, according to the fault type, the CNC machine tool is controlled to perform fault processing corresponding to the fault type, including:

[0104] When the fault type is the first fault type, the numerical control machine tool is controlled to stop; wherein the first fault type is a collision fault of the numerical control machine tool;

[0105] When the fault type is the second fault type, a prompt message is generated, and the CNC machine tool is controlled to play the prompt message; wherein the second fault type is other faults other than the collision fault occurring in the CNC machine tool.

[0106] Specifically, when the fault type is the first fault type, the CNC machine tool has a collision fault, that is, the rotating tool of the CNC machine tool collides with the workpiece, resulting in damage to the rotating tool. At this time, it is considered that the CNC machine tool has a serious fault and continuing to operate may cause further damage to the CNC machine tool. Therefore, when the fault type is the first fault type, the CNC machine tool is controlled to shut down.

[0107] In the case where the fault type is the first fault type, the CNC machine tool has other faults other than the collision fault, such as the rotation of the rotary tool is blocked, the safety door is not tightly closed, etc. At this time, it is difficult for the CNC machine tool to be damaged if it continues to run. Therefore, in the case where the fault type is the second fault type, a prompt message is generated, and the CNC machine tool is controlled to play the prompt message.

[0108] In some specific examples, the prompt information can be played through a prompt device provided on the CNC machine tool, for example, the prompt information can be played through a speaker provided on the CNC machine tool, thereby prompting the operator that the current CNC machine tool has a fault.

[0109] In the above embodiment, the CNC machine tool is controlled to display the fault type information. Therefore, after the operator hears the prompt information, the fault of the CNC machine tool can be processed according to the fault type information, which greatly increases the efficiency of fault processing.

[0110] Figure 2 This is a schematic diagram of the structure of an abnormal sound recognition device for a CNC machine tool provided in an embodiment of the present application, referring to Figure 2Corresponding to the above method embodiment, the embodiment of the present application also provides an abnormal sound recognition device for a CNC machine tool, which specifically includes an acquisition module 201, a processing module 202, an identification module 203 and a first determination module 204.

[0111] The acquisition module 201 is used to acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside the workbench of the CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and a safety door is provided on the CNC machine tool to divide the workbench of the CNC machine tool into independent spaces;

[0112] The processing module 202 is used to process the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool;

[0113] An identification module 203, used to identify whether the third sound signal is an abnormal sound signal;

[0114] The first determination module 204 is configured to determine that an abnormal sound occurs in the CNC machine tool when the third sound signal is an abnormal sound signal.

[0115] In a feasible embodiment of the present application, the processing module 202 includes:

[0116] an alignment unit, configured to align the first sound signal with the second sound signal in time;

[0117] A marking unit, used for marking a plurality of sampling points on the first sound signal;

[0118] The first processing unit is used to perform differential subtraction on the first sound signal and the second sound signal at each sampling point to obtain a third sound signal.

[0119] In a feasible embodiment of the present application, the identification module 203 includes:

[0120] A first acquisition unit, used to acquire a preset sound processing model;

[0121] A second processing unit is used to input the third sound signal into the sound processing model to obtain an output result of the sound processing model; wherein the output result is an abnormal sound result or a normal sound result;

[0122] The identification unit is used to identify whether the third sound signal is an abnormal sound signal according to the output result; wherein, when the output result is an abnormal sound result, the third sound signal is identified as an abnormal sound signal, and when the output result is a normal sound result, the third sound signal is identified as not an abnormal sound signal.

[0123] In a feasible embodiment of the present application, the device further includes:

[0124] A second determination module is used to determine the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information;

[0125] A generating module, used to generate fault type information corresponding to the fault type according to the fault type; and / or,

[0126] The control module is used to control the CNC machine tool to perform fault processing corresponding to the fault type according to the fault type.

[0127] In a feasible embodiment of the present application, the second determining module includes:

[0128] A second acquisition unit is used to acquire a historical operation log of the CNC machine tool; wherein the historical operation log is an operation log of the CNC machine tool within a preset time period before the moment when the abnormal sound of the CNC machine tool is identified;

[0129] A third acquisition unit, used to acquire third sound information within a preset time period;

[0130] A generating unit, configured to generate an abnormality record log according to the historical operation log and the third sound information within a preset time period;

[0131] The determination unit is used to determine the fault type of the fault causing the abnormal noise of the CNC machine tool according to the abnormal record log.

[0132] In a feasible embodiment of the present application, the control module includes:

[0133] A first control unit is used to control the CNC machine tool to stop when the fault type is a first fault type; wherein the first fault type is a collision fault of the CNC machine tool;

[0134] The second control unit is used to generate prompt information and control the CNC machine tool to play the prompt information when the fault type is a second fault type; wherein the second fault type is other faults of the CNC machine tool except the collision fault.

[0135] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0136] Figure 3 A schematic diagram of a structure of an abnormal sound recognition system for a CNC machine tool provided in an embodiment of the present application, referring to Figure 3The embodiment of the present application also provides an abnormal sound recognition system for a CNC machine tool, which specifically includes a first sound collection device 1, a second sound collection device 2 and a control mainboard 3.

[0137] The first sound collecting device 1 is arranged at a first position of the CNC machine tool 8, and the first sound collecting device 1 is used to collect a first sound signal. The second sound collecting device 2 is arranged at a second position of the CNC machine tool 8, and the second sound collecting device 2 is used to collect a second sound signal. A safety door 6 is arranged on the CNC machine tool 8 to isolate the workbench 7 of the CNC machine tool 8 from the external environment. The first position is any position on the CNC machine tool 8 inside the safety door 6, and the second position is any position on the CNC machine tool 8 outside the safety door 6.

[0138] The control mainboard 3 is connected to the first sound collecting device 1 and the second sound collecting device 2 respectively, and the control mainboard 3 is used for a method for detecting abnormal noise of a numerically controlled machine tool 8 described in any one of the above method embodiments.

[0139] Specifically, the abnormal sound recognition system for a CNC machine tool provided in the embodiment of the present application is arranged on the CNC machine tool 8. Figure 4 FIG. 8 is a schematic diagram of the structure of a CNC machine tool 8. The configuration of an abnormal sound recognition system for a CNC machine tool provided in an embodiment of the present application on the CNC machine tool 8 is as follows: Figure 4 shown.

[0140] Reference Figure 4 The CNC machine tool 8 processes the workpiece through the rotating tool installed in the workbench 7. The workbench 7 in the CNC machine tool 8 is isolated by the safety door 6. The safety door 6 can be made of high-strength transparent material. The safety door 6 divides the workbench 7 into independent spaces.

[0141] The first sound collecting device 1 is disposed at a first position of the CNC machine tool 8, and the first position is any position on the CNC machine tool 8 inside the safety door 6, and the first sound collecting device 1 collects a first sound signal. It can be seen that since the first sound collecting device 1 is disposed at the first position of the CNC machine tool 8, the first sound signal collected by the first sound collecting device 1 is a sound signal in an independent space including the workbench 7 divided by the safety door 6.

[0142] The second sound collecting device 2 is disposed at a second position of the CNC machine tool 8, and the second position is any position on the CNC machine tool 8 outside the safety door 6. For example, the second sound collecting device 2 is disposed on the outer shell of the CNC machine tool 8, and the second sound collecting device 2 collects the second sound signal. It can be seen that since the second sound collecting device 2 is disposed at the second position of the CNC machine tool 8, the second sound signal collected by the second sound collecting device 2 is the sound signal in the external space divided by the safety door 6 and excluding the workbench 7.

[0143] In some specific examples, the first sound collecting device 1 and the second sound collecting device 2 may be microphones.

[0144] The control mainboard 3 is connected to the first sound collection device 1 and the second sound collection device 2 respectively. The control mainboard 3 can execute a method for detecting abnormal sound of a numerical control machine tool 8 described in any one of the above method embodiments, for example, including:

[0145] Acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside a workbench of a CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and a safety door is provided on the CNC machine tool to divide the workbench of the CNC machine tool into independent spaces;

[0146] Processing the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool;

[0147] identifying whether the third sound signal is an abnormal sound signal;

[0148] When the third sound signal is an abnormal sound signal, it is determined that the numerically controlled machine tool generates an abnormal sound.

[0149] In some specific examples, the control mainboard 3 may specifically be a core controller of a CNC machine tool 8 .

[0150] In a feasible embodiment of the present application, the system further includes a display device 4 and a prompt device 5, and the display device 4 and the prompt device 5 are both connected to the control mainboard 3;

[0151] The display device 4 is used to display the fault type information when the CNC machine tool 8 makes an abnormal sound; wherein the fault type information is used to describe the fault type that causes the CNC machine tool 8 to make an abnormal sound;

[0152] The prompt device 5 is used to play a prompt message when the CNC machine tool 8 makes an abnormal sound; wherein the prompt message is used to prompt to handle the fault that causes the CNC machine tool 8 to make the abnormal sound.

[0153] Specifically, the display device 4 is arranged on the housing of the numerical control machine tool 8, and the display device 4 can display to the operator. The display device 4 is connected to the control mainboard 3, receives the fault type information from the control mainboard 3, and displays the fault type information.

[0154] In some specific examples, the display device 4 may specifically be a display.

[0155] The prompt device 5 is also arranged on the housing of the numerical control machine tool 8, and the prompt device 5 can give prompts to the operator. The prompt device 5 is connected to the control mainboard 3, receives the prompt information from the control mainboard 3, and plays the prompt information.

[0156] In some specific examples, the prompting device 5 may specifically be a speaker.

[0157] Continue to refer to Figure 4 The embodiment of the present application also provides a CNC machine tool 8, which includes an abnormal sound recognition system for a CNC machine tool as described in any of the above system embodiments, for example, including a first sound collection device 1, a second sound collection device 2, a control mainboard 3, a display device 4 and a prompt device 5.

[0158] The specific arrangement of the first sound collecting device 1, the second sound collecting device 2, the control mainboard 3, the display device 4 and the prompting device 5 on the numerically controlled machine tool 8 has been described in detail in the above system embodiment and will not be repeated here.

[0159] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0160] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for identifying abnormal noise of a CNC machine tool, characterized in that: The method comprises: Acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside the workbench of the CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and the CNC machine tool is provided with a safety door to divide the workbench of the CNC machine tool into independent spaces; Processing the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool; identifying whether the third sound signal is an abnormal sound signal; When the third sound signal is the abnormal sound signal, it is determined that the CNC machine tool generates an abnormal sound.

2. The method according to claim 1, characterized in that: Processing the first sound signal and the second sound signal to determine a third sound signal includes: aligning the first sound signal with the second sound signal in time; Marking a plurality of sampling points on the first sound signal; The first sound signal is differentially subtracted from the second sound signal at each sampling point to obtain the third sound signal.

3. The method according to claim 1, characterized in that Identifying whether the third sound signal is an abnormal sound signal includes: Get the preset sound processing model; Inputting the third sound signal into the sound processing model to obtain an output result of the sound processing model; wherein the output result is an abnormal sound result or a normal sound result; Identify whether the third sound signal is the abnormal sound signal according to the output result; wherein, if the output result is the abnormal sound result, identify the third sound signal as the abnormal sound signal, and if the output result is the normal sound result, identify the third sound signal as not the abnormal sound signal.

4. The method according to claim 1, characterized in that After determining that the CNC machine tool generates an abnormal sound, the method further includes: Determining the fault type of the fault causing the abnormal sound of the CNC machine tool according to the third sound information; Generate fault type information corresponding to the fault type according to the fault type; and / or, According to the fault type, the numerically controlled machine tool is controlled to perform fault processing corresponding to the fault type.

5. The method according to claim 4, characterized in that Determining the fault type of the fault causing the abnormal sound of the numerically controlled machine tool according to the third sound information includes: Acquire a historical operation log of the CNC machine tool; wherein the historical operation log is an operation log of the CNC machine tool within a preset time period before the moment when the abnormal sound of the CNC machine tool is identified; Acquiring the third sound information within the preset time period; Generate an abnormal record log according to the historical operation log and the third sound information within the preset time period; The fault type of the fault causing the abnormal noise of the numerically controlled machine tool is determined according to the abnormal record log.

6. The method according to claim 4, characterized in that Controlling the numerically controlled machine tool to perform fault processing corresponding to the fault type according to the fault type includes: When the fault type is a first fault type, the CNC machine tool is controlled to stop; wherein the first fault type is a collision fault of the CNC machine tool; When the fault type is the second fault type, a prompt message is generated, and the CNC machine tool is controlled to play the prompt message; wherein, the second fault type is other faults occurring in the CNC machine tool except for the collision fault.

7. An abnormal sound recognition device for a CNC machine tool, characterized in that: The device comprises: an acquisition module, configured to acquire a first sound signal and a second sound signal; wherein the first sound signal is recorded inside the workbench of the CNC machine tool, and the second sound signal is recorded outside the workbench of the CNC machine tool, and the CNC machine tool is provided with a safety door to divide the workbench of the CNC machine tool into independent spaces; A processing module, configured to process the first sound signal and the second sound signal to determine a third sound signal; wherein the third sound signal is a sound signal corresponding to the working sound of the CNC machine tool; an identification module, used for identifying whether the third sound signal is an abnormal sound signal; The first determination module is used to determine that the CNC machine tool has an abnormal sound when the third sound signal is the abnormal sound signal.

8. An abnormal sound recognition system for a CNC machine tool, characterized in that: The system includes a first sound collection device, a second sound collection device and a control mainboard; The first sound collecting device is arranged at a first position of the CNC machine tool, and is used to collect a first sound signal. The second sound collecting device is arranged at a second position of the CNC machine tool, and is used to collect a second sound signal. A safety door is arranged on the CNC machine tool to isolate the working table of the CNC machine tool from the external environment. The first position is any position on the CNC machine tool inside the safety door, and the second position is any position on the CNC machine tool outside the safety door. The control mainboard is connected to the first sound collection device and the second sound collection device respectively, and the control mainboard is used to execute the abnormal sound method of a CNC machine tool as described in any one of claims 1-5.

9. The system according to claim 7, characterized in that The system also includes a display device and a prompt device, and the display device and the prompt device are both connected to the control mainboard; The display device is used to display fault type information when the CNC machine tool generates an abnormal sound; wherein the fault type information is used to describe the fault type of the fault that causes the CNC machine tool to generate an abnormal sound; The prompt device is used to play a prompt message when the CNC machine tool generates an abnormal sound; wherein the prompt message is used to prompt to handle the fault that causes the abnormal sound of the CNC machine tool.

10. A numerically controlled machine tool, characterized in that: The CNC machine tool includes the abnormal sound recognition system for a CNC machine tool as described in claim 7.

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