CN109781244A - A kind of cutting tool for CNC machine vibration signal detection system and detection method - Google Patents
A kind of cutting tool for CNC machine vibration signal detection system and detection method Download PDFInfo
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Abstract
The invention discloses a kind of cutting tool for CNC machine vibration signal detection system and detection methods, including vibration signal acquisition device, data processing module and analytical judgment module；The vibration signal acquisition device is fixed on numerically-controlled machine tool knife platform, for detecting vibration cutting information and exporting corresponding detection signal to data processing module；The data processing module is used to export data to be analyzed to analyzing and determining module to after detection signal progress differential amplification processing；The analytical judgment module carries out judgement classification to the data to be analyzed currently acquired for data category according to the pre-stored data, exports pre-warning signal when being judged as abnormal vibrations data category.By encapsulating the rigid vibration signal acquisition device being fixed on lathe, the running state information of contactless acquisition machine tool, and the data category based on preparatory training identification realizes fault detection and early warning to vibration cutting signal, has many advantages, such as that high sensitivity, non-contact detection, measurement accuracy of identification are high.
Description
Technical field
The present invention relates to vibration detection technology field, in particular to a kind of cutting tool for CNC machine vibration signal detection system and
Detection method.
Background technique
No matter in the modern manufacturings industry such as aerospace, machine-building, petrochemical industry, the effect of numerically-controlled machine tool is all can not
Or lack, the level of autonomous innovation and development, the needs of national economy and nation-building, all to the development of China's future technology
With very important strategic importance.The vibration detection analysis of numerically-controlled machine tool is of great significance, and wherein cutter is damaged on lathe
Bad components the most frequent, the abrasion of cutter will affect the machining accuracy of lathe, cause serious economic loss, therefore logarithm
The detection of control lathe abnormal vibrations is detected primarily directed to the abnormal vibrations of machine tool.
Currently, traditional sensor, such as velocity sensor are applied in the detection to cutting tool for CNC machine vibration signal mostly
And acceleration transducer, then the variation of sensor parameters is recorded and analyzed.But traditional sensor is in numerically-controlled machine tool
Under conditions of vibration cutting, the variation range of resistance value is generally smaller, and is mostly the detection of contact, this is to machine tool
Abnormal vibrations reflect inaccurate, and collected data have very big error, this influences whether precision of analysis.
Thus the prior art could be improved and improve.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of vibrations of cutting tool for CNC machine to believe
Number detection system and detection method, by encapsulating the rigid vibration signal acquisition device being fixed on lathe, contactless acquisition
The running state information of machine tool, and the data category based on preparatory training identification realizes the failure to vibration cutting signal
Detection and early warning have many advantages, such as that high sensitivity, non-contact detection, measurement accuracy of identification are high.
In order to achieve the above object, this invention takes following technical schemes:
A kind of cutting tool for CNC machine vibration signal detection system comprising vibration signal acquisition device, data processing module and point
Analyse judgment module；The vibration signal acquisition device is fixed on numerically-controlled machine tool knife platform and is electrically connected with data processing module, institute
Vibration signal acquisition device is stated for detecting vibration cutting information and exporting corresponding detection signal to data processing module；It is described
Data processing module is also electrically connected with module is analyzed and determined, for defeated after the detection signal progress differential amplification processing received
Data to be analyzed are to analyzing and determining module out；The analytical judgment module is for data category according to the pre-stored data to currently adopting
The data to be analyzed of collection carry out judgement classification, export pre-warning signal when being judged as abnormal vibrations data category.
In the cutting tool for CNC machine vibration signal detection system, the vibration signal acquisition device includes being fixed on number
The protective shell on machine tool table is controlled, and is pasted onto the flexible foil gauge that the surface inside the protective shell has crackle array,
The surface of the flexibility foil gauge is also coated with conductive coating, and the both ends of the flexibility foil gauge are provided with and the data processing
The contact conductor of module electrical connection, the flexibility foil gauge are exported according to vibration cutting information at the resistance value to data of real-time change
Manage module.
In the cutting tool for CNC machine vibration signal detection system, the protective shell includes pedestal and outside protective covers, institute
Stating pedestal includes substrate, and support frame is provided on the substrate, and the both ends correspondence of the flexibility foil gauge is pasted on the support
The middle section at the both ends of frame, support frame as described above has the first groove, and the surrounding of support frame as described above is additionally provided with and the protection
The frame of outer cover cooperation；The bottom of the outside protective covers is provided with the second groove, and the outside protective covers and pedestal pass through the side
Frame and the assembly of the second groove are integrated, and the side of the outside protective covers is additionally provided with threading hole.
In the cutting tool for CNC machine vibration signal detection system, the first screw hole is provided on the substrate, it is described
Position corresponding with first screw hole is provided with the second screw hole on outside protective covers, runs through first spiral shell by connector
The vibration signal acquisition device is fixed on numerically-controlled machine tool knife platform after wire hole and the second screw hole, it is contactless to realize
The acquisition of machine tool vibration information.
It is between the frame and the second groove and described in the cutting tool for CNC machine vibration signal detection system
Sealant is provided in threading hole.
In the cutting tool for CNC machine vibration signal detection system, the data processing module includes converting unit, difference
Divide amplifying unit and data acquisition unit；The converting unit is electrically connected with the flexible foil gauge and differential amplification unit, is used
It exports after the real-time change resistance value of flexible foil gauge to be converted to corresponding voltage signal to differential amplification unit；The difference
Amplifying unit is connect with data acquisition unit, for discrete to exporting after voltage signal progress Difference Calculation and enhanced processing
Signal is to data acquisition unit；The data acquisition unit is also connect with module is analyzed and determined, for acquiring the differential amplification
Data to be analyzed are exported to analyzing and determining module after the discrete signal of unit output.
In the cutting tool for CNC machine vibration signal detection system, the converting unit is Wheatstone bridge, described soft
Property foil gauge connected by the empty bridge arm of the contact conductor at both ends and Wheatstone bridge, the output end connection of the Wheatstone bridge
The differential amplification unit.
In the cutting tool for CNC machine vibration signal detection system, the analytical judgment module includes that training identification is single
Member, taxon and fault pre-alarming unit；The trained recognition unit is used for according to training sample gathered in advance and presets
Training pattern generates corresponding data category；The taxon is used for be analyzed to what is currently acquired according to the data category
Data carry out judgement classification；The fault pre-alarming unit is used for when current data to be analyzed are judged as abnormal vibrations data category
Export pre-warning signal.
A kind of cutting tool for CNC machine vibration signal detection method comprising following steps:
By the vibration signal acquisition device detection vibration cutting information being fixed on numerically-controlled machine tool knife platform and export corresponding detection
Signal；
Data to be analyzed are exported after carrying out differential amplification processing to the detection signal received；
Data category according to the pre-stored data carries out judgement classification to the data to be analyzed currently acquired, and is being judged as abnormal vibration
Pre-warning signal is exported when dynamic data category.
In the cutting tool for CNC machine vibration signal detection method, the data category according to the pre-stored data is to current
Acquisition data to be analyzed carry out judgement classification, and when being judged as abnormal vibrations data category export pre-warning signal the step of packet
It includes:
Corresponding data category is generated according to training sample gathered in advance and default training pattern；
Judgement classification is carried out to the data to be analyzed currently acquired according to the data category；
Pre-warning signal is exported when current data to be analyzed are judged as abnormal vibrations data category.
Compared to the prior art, in cutting tool for CNC machine vibration signal detection system and detection method provided by the invention,
The cutting tool for CNC machine vibration signal detection system includes vibration signal acquisition device, data processing module and analytical judgment mould
Block；The vibration signal acquisition device is fixed on numerically-controlled machine tool knife platform and is electrically connected with data processing module, the vibration letter
Number acquisition device is for detecting vibration cutting information and exporting corresponding detection signal to data processing module；The data processing
Module is also electrically connected with module is analyzed and determined, for be analyzed to exporting after the detection signal progress differential amplification processing received
Data are to analyzing and determining module；It is described analyze and determine module for data category according to the pre-stored data to currently acquire to point
Analysis data carry out judgement classification, export pre-warning signal when being judged as abnormal vibrations data category.Lathe is fixed on by encapsulation
On rigid vibration signal acquisition device, it is contactless acquisition machine tool running state information, and based in advance training
The data category of identification realizes the fault detection and early warning to vibration cutting signal, has high sensitivity, non-contact detection, survey
Measure the advantages that accuracy of identification is high.
Detailed description of the invention
Fig. 1 is the structural block diagram of cutting tool for CNC machine vibration signal detection system provided by the invention.
Fig. 2 is the side schematic view of flexible foil gauge and pedestal in vibration signal acquisition device provided by the invention.
Fig. 3 is the perspective view of flexible foil gauge and pedestal in vibration signal acquisition device provided by the invention.
Fig. 4 is the perspective view of an angle of outside protective covers in vibration signal acquisition device provided by the invention.
Fig. 5 is the perspective view of another angle of outside protective covers in vibration signal acquisition device provided by the invention.
Fig. 6 is schematic diagram of the flexible foil gauge under squeezed state in vibration signal acquisition device provided by the invention.
Fig. 7 is the schematic diagram of flexible foil gauge in a stretched state in vibration signal acquisition device provided by the invention.
Fig. 8 is the circuit diagram of Wheatstone bridge in cutting tool for CNC machine vibration signal detection system provided by the invention.
Fig. 9 is the circuit diagram of differential amplification unit in cutting tool for CNC machine vibration signal detection system provided by the invention.
Figure 10 ~ Figure 19 is the electricity of data acquisition unit in cutting tool for CNC machine vibration signal detection system provided by the invention
Lu Tu.
Figure 20 is the flow chart of cutting tool for CNC machine vibration signal detection method provided by the invention.
Specific embodiment
The present invention provides a kind of cutting tool for CNC machine vibration signal detection system and detection method, is fixed on machine by encapsulation
Rigid vibration signal acquisition device on bed, the running state information of contactless acquisition machine tool, and based on instruction in advance
The data category for practicing identification realizes fault detection and early warning to vibration cutting signal, have high sensitivity, non-contact detection,
Measure the advantages that accuracy of identification is high.
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to
Limit the present invention.
Referring to Fig. 1, cutting tool for CNC machine vibration signal detection system provided by the invention includes vibration signals collecting dress
Set 1, data processing module 2 and analyze and determine module 3, the vibration signal acquisition device 1 be fixed on numerically-controlled machine tool knife platform and
It is electrically connected with data processing module 2, the data processing module 2 is also electrically connected with module 3 is analyzed and determined, wherein the vibration
Signal pickup assembly 1 is for detecting vibration cutting information and exporting corresponding detection signal to data processing module 2, the data
Processing module 2 is used to carry out the detection signal that receives to export after differential amplification processing data to be analyzed to analyzing and determining module
3, the analytical judgment module 3 carries out judgement point to the data to be analyzed currently acquired for data category according to the pre-stored data
Class exports pre-warning signal when being judged as abnormal vibrations data category.Cutting tool for CNC machine vibration signal i.e. provided by the invention
In detection system, by the vibration signal acquisition device 1 being mounted on numerically-controlled machine tool, the operation of contactless acquisition machine tool
Status information, and to detection signal carry out data processing after feed back data to be analyzed, later based in advance training identification and
The data category of storage carries out judgement classification to the data to be analyzed currently acquired, when being judged as abnormal vibrations data category and
When export pre-warning signal, to realize fault detection and early warning to vibration cutting signal, there is high sensitivity, contactless inspection
It surveys, measure the advantages that accuracy of identification is high.
Specifically, Fig. 2 to Fig. 7 is please referred to, is in cutting tool for CNC machine vibration signal detection system provided by the invention
The structural representation of vibration signal acquisition device 1, wherein the vibration signal acquisition device 1 includes being fixed on numerically-controlled machine tool knife platform
Protective shell, and be pasted onto the flexible foil gauge 10 that surface inside the protective shell has crackle array, the flexibility is answered
The surface for becoming piece 10 is also coated with conductive coating, and the both ends of the flexibility foil gauge 10 are provided with and the data processing module 2
The contact conductor 101 of electrical connection, the flexibility foil gauge 10 export the resistance value of real-time change to data according to vibration cutting information
Processing module 2.Vibration signal acquisition device 1 i.e. provided by the invention be by will have the flexible foil gauge 10 of crackle array with
The assembly of rigid protective shell is fixed on numerically-controlled machine tool knife platform again after being integrated, and numerically-controlled machine tool can generate vibration when running, flexible
Foil gauge 10 vibrates therewith, and the micro-cracks structure on surface changes when flexible foil gauge 10 vibrates, and leads to flexible foil gauge
10 resistance variations, by the resistance value of the real-time change as the detection signal of vibration cutting and subsequently through data processing mould
Block 2 is converted to electric signal output, and cutting tool for CNC machine vibration is perceived using flexible foil gauge 10, is realized non-contactly to cutter
Vibration information be detected and analyzed, be quick on the draw, measurement accuracy is high, effectively increases the accuracy of vibration detection.
Preferably, the micro-crack array that the surface of the flexible foil gauge 10 has arranging rule controllable, specifically can basis
Actual demand designs crack pattern, and the preferably imitative scorpion crack structure of the crackle array, belongs to a kind of bionical sensing in the present embodiment
Device utilizes the fissility of polystyrene (PS), using the method for solvent-induced expansion and double-template transfer, in poly dimethyl silicon
The surface oxygen alkane (PDMS) prepares a plurality of parallel fracture structure, and is coated with conductive coating on the surface of flexible foil gauge 10, i.e., soft
Property material surface distribution two wall of crackle on be uniformly distributed conducting particles, when Vibration of Computerized Numerical Control Machine, flexible foil gauge 10 can be with
Vibration and deformation occurs, as shown in Figure 6 and Figure 7, when the generation with vibration, when squeezing or stretching flexible foil gauge 10, split
The slit width of line will change, such as the slit width a under squeezed state is significantly less than the slit width b under tensional state, this, which will lead to, splits
Conducting particles contact condition changes between seam, and the number of electron channel changes therewith, directly translates into resistance and changes, most
After be converted into electric signal output, and then realize detection to vibration cutting.
When it is implemented, the protective shell includes pedestal 11 and outside protective covers 12, wherein 11 substrate 111 of the pedestal, institute
It states and is provided with support frame 112 on substrate 111, the both ends correspondence of the flexibility foil gauge 10 is pasted on the two of support frame as described above 112
The middle section at end, support frame as described above 112 has the first groove 113, and the surrounding of support frame as described above 112 is additionally provided with and the guarantor
The frame 114 that outer cover 12 cooperates is protected, the bottom of the outside protective covers 12 is provided with the second groove 121,12 He of outside protective covers
Pedestal 11 is integrated by the frame 114 and the assembly of the second groove 121, and the side of the outside protective covers 12 is additionally provided with logical line
Hole 122.
Be provided with the first screw hole 115 on the substrate 111, on the outside protective covers 12 with first screw hole 115
Corresponding position is provided with the second screw hole 123, runs through first screw hole 115 and the second screw hole 123 by connector
The vibration signal acquisition device 1 is fixed on numerically-controlled machine tool knife platform afterwards, to realize contactless machine tool vibration letter
Breath acquisition.
In the present embodiment, support frame as described above 112 supports the both ends of the flexible foil gauge 10, the specific flexible foil gauge
10 bottom is elastic insulating material, so that insulate between flexible foil gauge 10 and pedestal 11, the middle part of support frame as described above 112
It is divided into the first groove 113, i.e., the middle section of flexible foil gauge 10 is hanging, just makes the crackle on flexible foil gauge 10 in this way
Structure is in vacant state, effectively increases the oscillating region of flexible foil gauge 10, is conducive to the 10 pairs of vibrations of flexible foil gauge and does
More sensitive induction out, it is ensured that the optimal acquisition effect having to vibration information.The outside protective covers 12 and pedestal 11 are filling
Timing engages assembly with the realization of the second groove 121 by mutually matched protrusion frame 114 and is integrated, while protecting
The side of outer cover 12 is additionally provided with threading hole 122, convenient for drawing the contact conductor 101 at flexible 10 both ends of foil gauge, assembles
After pedestal 11 and outside protective covers 12, pass through the first screw hole 115 on pedestal 11 and the second screw hole on outside protective covers 12
123, entire vibration signal acquisition device 1 is fixed on the knife platform of numerically-controlled machine tool with connector such as screw bolt and nut, pedestal
Knife platform is close in 11 bottom surface, realizes contactless and highly sensitive vibration induction.
Preferably, sealing is provided between the frame 114 and the second groove 121 and in the threading hole 122
Glue.I.e. after fixing flexible foil gauge 10 and drawing contact conductor 101, between the frame 114 and the second groove 121,
And sealed with hot melt adhesive at the threading hole 122 on protective shell, it prevents the coolant liquid of numerically-controlled machine tool from entering, adopts vibration signal
Acquisition means 1 break down, and improve the stability and reliability of vibration detection.
Further, the pedestal 11 and outside protective covers 12 are both preferably aluminum material, due to the lighter weight of aluminium and strong
Degree and hardness are preferable, can be effectively protected and internal flexible foil gauge 10 is arranged in, it is ensured that 1 work of entire vibration signal acquisition device
The safety of work.
Specifically, in cutting tool for CNC machine vibration signal detection system provided by the invention, the data processing module 2 is wrapped
Converting unit, differential amplification unit and data acquisition unit are included, the converting unit connects 10 both ends of the flexible foil gauge
Contact conductor 101, the converting unit, differential amplification unit and data acquisition unit are sequentially connected, the data acquisition unit
It is also connected with the analytical judgment module 3, wherein the converting unit is used to convert the real-time change resistance value of flexible foil gauge 10
For output after corresponding voltage signal to differential amplification unit, it is poor that the differential amplification unit is used to carry out the voltage signal
Divide and calculate and export after enhanced processing discrete signal to data acquisition unit, the data acquisition unit is for acquiring the difference
Data to be analyzed are exported after the discrete signal of amplifying unit output to analytical judgment module 3.In the present embodiment, when flexible foil gauge
10 with vibration cutting deformation occurs and when changing resistance, the real-time change resistance of flexible foil gauge 10 is turned by converting unit
Output two paths of signals to differential amplification unit, differential amplification unit believes the two-way that input is come in after being changed to corresponding voltage signal
Number subtracted each other, and the differential signal of input is amplified, is later exported amplified signal to data acquisition unit, by
Data to be analyzed are exported after data acquisition unit acquisition discrete signal to module 3 is analyzed and determined, for analyzing and determining module 3 to working as
The working condition of preceding cutter carries out judgement identification, realizes and measures accurate, high sensitivity contactless vibration information detection.
When it is implemented, the converting unit is Wheatstone bridge, the flexibility foil gauge 10 is drawn by the electrode at both ends
Line 101 is connect with the empty bridge arm of Wheatstone bridge, and the output end of the Wheatstone bridge connects the differential amplification unit.It please one
It is the circuit diagram of Wheatstone bridge comprising first resistor R1, second resistance R2,3rd resistor R3 and the 4th and refering to Fig. 8
Resistance R4, one end of the first resistor R1 and one end of second resistance R2 are all connected with VCC feeder ear, the first resistor R1's
The other end connects one end and the differential amplification unit of the 4th resistance R4, and the other end of the second resistance R2 connects 3rd resistor R3
One end and differential amplification unit, the other end of the 4th resistance R4 and the other end of 3rd resistor R3 be grounded.Wherein
One resistance R1, second resistance R2 and the 4th resistance R4 are fixed value resistance, and resistance value size is 100 ohm, 3rd resistor R3 bridge arm
For empty bridge arm, that is, the contact conductor 101 at 10 both ends of the flexible foil gauge is connected, the resistance value of 3rd resistor R3 is flexible strain
The real-time resistance value of piece 10, when Vibration of Computerized Numerical Control Machine, vibration signal acquisition device 1 vibrates therewith, the resistance value of flexible foil gauge 10
Significant change occurs, both ends real-time voltage is, whereinFor fixed value resistance,
For electric bridge both ends given voltage,For the real time resistance of the flexible foil gauge 10 of imitative scorpion crack structure.Imitative scorpion crack structure
The resistance range of flexible foil gauge 10 is larger, and resistance value is 120 ohm when static, and change in resistance range is up to 100 ~ 2000
Ohm, thus small vibration can also make thereon crack structure change and then lead to change in resistance, realize that wide scope is highly sensitive
The vibration detection of degree.
Further, the differential amplification unit includes operational amplifier U1, the 5th resistance R5, the 6th resistance R6, the 7th
Resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, first capacitor C1, the second capacitor C2, third capacitor C3,
Four capacitor C4 and the 5th capacitor C5；The 2nd foot of the operational amplifier U1 connects one end and the 6th resistance R6 of the 5th resistance R5
One end, the 6th foot of the other end connection operational amplifier U1 of the 5th resistance R5, the other end of the 6th resistance R6 passes through the
The other end of one end of seven resistance R7 connection first capacitor C1, the first capacitor C1 passes through second interface P2 connection second resistance
The other end of R2；The 3rd foot connection of the operational amplifier U1 is grounded by the 8th resistance R8, also passes through the 9th resistance R9 connection
One end of second capacitor C2, the other end of the second capacitor C2 pass through the other end of third interface P3 connection first resistor R1；
The 4th foot of the operational amplifier U1 is grounded by the 5th capacitor C5；The 6th foot of the operational amplifier U1 connects the 4th capacitor
The other end of one end of C4, the 4th capacitor C4 passes through first interface P1 connection data acquisition unit, the operational amplifier
One end of the 7th foot connection the VDD feeder ear and third capacitor C3 of U1, the other end ground connection of the third capacitor C3, the operation
The 2nd foot of amplifier U1 and the 6th foot also pass through the tenth resistance R10 connection, wherein the tenth resistance R10 is variable resistance, for adjusting
Amplification factor is saved, is connect especially by OUT- the and OUT+ pin of the 2nd foot of operational amplifier U1 and the 3rd foot connection Wheatstone bridge
Two-way voltage signal is received, is exported by the 6th foot to data acquisition unit after carrying out Difference Calculation and amplifying and realizes signal output, from
And the change in resistance of flexible foil gauge 10 is converted into accurate electric signal and is exported, improve the measurement accuracy of vibration detection.
It further, is cutting tool for CNC machine vibration signal provided by the invention also referring to Figure 10 to Figure 19
The circuit diagram of data acquisition unit in detection system, the data acquisition unit include controller U2, flash memories U3, data acquisition
Device U4, connector U5, USB interface P4, switching chip U6 and voltage-stablizer U7, realize the acquisition of discrete signal and will export to be analyzed
Data extremely analyze and determine module 3.
As shown in figure 11, the flash memories U3 is used for temporal data, temporary data storage function is realized, wherein the flash memories U3
The 1st foot connection controller U2 PD7 foot, also by twelfth resistor R12 connection 3.3V feeder ear, the of the flash memories U3
6 feet, the 5th foot and the 2nd foot are connected respectively the PB13 foot, PB14 foot and PB15 foot of controller U2, and the 3rd of the flash memories U3 the
By eleventh resistor R11 connection 3.3V feeder ear after foot and the connection of the 7th foot, the 8th foot of the flash memories U3 passes through the 6th electricity
Hold C6 ground connection, when it is implemented, the flash memories U3 of model W25Q80B can be used in the flash memories U3, the controller U2 can
Using the controller U2 of model STM32F103ZE, certainly in other embodiments, can also be used other with the same function
Flash memories U3 and controller U2, this is not limited by the present invention.
As shown in Figure 12 and Figure 13, the data collector U4 is used to acquire output signal and the transmission of differential amplification unit
Controller U2, the connector U5 to be used to provide external signal input for data collector U4, wherein the data collector
The 7th foot of U4 and the 8th foot are connected and are connected to the PB pin of controller U2, and the 3rd foot of the data collector U4 connects control
The PC13 foot of device U2, the 17th foot, the 18th foot, the 10th foot, the 14th foot, the 28th foot, the 29th foot and of the data collector U4
30 feet are connected respectively PD0 foot, PD1 foot, PD4 foot, PD6 foot, PD8 foot, PD9 foot and the PD10 foot of controller U2, the number
According to the 6th foot, the 5th foot, the 4th foot, the 19th foot, the 20th foot, the 21st foot, the 22nd foot, the 23rd foot, the 24th foot, the 25th of collector U4
Foot, the 26th foot and the 27th foot be connected respectively the PE4 foot of controller U2, PE5 foot, PE6 foot, PE7 foot, PE8 foot, PE9 foot,
9th foot of PE10 foot, PE11 foot, PE12 foot, PE13 foot, PE14 foot and PE15 foot, the data collector U4 connects controller
The PF5 foot of U2, the 12nd foot and the 11st foot of the five data collectors U4 are connected respectively the PG6 foot and PG9 of controller U2
Foot.The 7th foot, the 6th foot, the 5th foot and the 4th foot of the connector U5 be connected respectively the PA0 foot of controller U2, PA1 foot,
PA2 foot and PA3 foot, the 20th foot, the 19th foot, the 18th foot and the 17th foot of the connector U5 are connected respectively controller U2's
PF6 foot, PF7 foot, PF8 foot and PF9 foot, when it is implemented, the data of model AD7606 can be used in the data collector U4
Collector U4, the connector U5 certainly in other embodiments can also using the AMP connector U5 of model AMP_20ch
Using other data collector U4 with the same function and connector U5, this is not limited by the present invention.
Further, as shown in figure 14, the USB interface P4 is used for the data to be analyzed that controller U2 is acquired and exported
It is transferred to and analyzes and determines module 3, wherein the 2nd foot of USB interface P4 and the 3rd foot are used for linking parsing judgment module 3, USB interface
The hanging pin in the left side of P4 is used to connect the reception transmitting pin i.e. RX/TX pin of controller U2.
Preferably, as shown in figure 15, it is USB conversion circuit, usb signal can be converted to rs 232 serial interface signal, is suitable for more
More data transmitting scene, wherein the PA9 foot of the 3rd foot connection controller U2 of the switching chip U6, the switching chip U6
The 4th foot and the 16th foot connect 3.3V feeder ear, and the 4th foot also pass through the 8th capacitor C8 ground connection, the 16th foot also pass through the 7th electricity
Hold the 1st foot of C7 connection and ground；It is described switching chip U6 the 5th foot and the 6th foot be connected respectively USB interface P4 the 3rd foot and
7th foot of the 2nd foot, the switching chip U6 connects one end of the 9th capacitor C9 and one end of the first crystal oscillator Y1, the switching core
The 8th foot of piece U6 connects one end of the tenth capacitor C10 and the other end of the first crystal oscillator Y1, the other end of the 9th capacitor C9 and
The other end of tenth capacitor C10 is grounded, and the first crystal oscillator Y1 is used to provide clock signal for switching chip U6, is embodied
When, it can also be used certainly in other embodiments in the switching chip U6 that model CH340G can be used in the switching chip U6
Its switching chip U6 with the same function, this is not limited by the present invention.
It further, as shown in figure 16, is power-switching circuit, for being it after 5V power supply is converted to 3.3V power supply
His chip and controller U2 stable power-supplying, wherein the 3rd foot of voltage-stablizer U7 connects 5V feeder ear, and is also connected with the 11st capacitor
The anode of C11 and one end of the 12nd capacitor C12, the cathode and the 12nd capacitor C12 circuit of the 11st capacitor C11 are another
End is grounded, and the 2nd foot of the voltage-stablizer U7 and the 4th foot connection 3.3V feeder ear and then output 3.3V voltage are other parts confession
Electricity, and the 2nd foot of voltage-stablizer U7 and the 4th foot are all connected with anode and one end of the 14th capacitor C14 of the 13rd capacitor C13, institute
The cathode of the 13rd capacitor C13 and the other end ground connection of the 14th capacitor C14 are stated, input terminal is gone by capacitor with output end
It makes an uproar, improves the stability of supply voltage.
Further, as shown in Figure 17,18 and 19, the data acquisition unit further includes providing clock for controller U2
The the second crystal oscillator Y2 and third crystal oscillator Y3 of signal, and the reset circuit resetted for realizing controller U2, wherein the second crystal oscillator
The 10th foot of one end connection controller U2 of Y2 also passes through the 15th capacitor C15 ground connection, the other end connection control of the second crystal oscillator Y2
The 11st foot of device U2 processed also passes through the 16th capacitor C16 ground connection；The 23rd foot of one end connection controller U2 of third crystal oscillator Y3,
It is also grounded by the 17th capacitor C17, the 24th foot of the other end connection controller U2 of third crystal oscillator Y3 also passes through the 18th electricity
Hold C18 ground connection, provides high-precision clock signal by the second crystal oscillator Y2 and third crystal oscillator Y3 for controller U2.It is described multiple
In the circuit of position, one end of thirteenth resistor R13 connects 3.3V feeder ear, and the other end of thirteenth resistor R13 connects reset switch
One end of RST and the 25th foot of controller U2 are also grounded by the 19th capacitor C19, pass through the reset pin with controller U2
Connection can realize the reset operation of controller U2, when reset switch RST is pressed convenient for when replacement detects environment
Data Restore Handles Technique can be carried out, newest most accurate vibration detection data are obtained.
Further, in cutting tool for CNC machine vibration signal detection system provided by the invention, the analytical judgment module 3
Host computer can be used comprising training recognition unit, taxon and fault pre-alarming unit, the trained recognition unit, classification
Unit and fault pre-alarming unit are sequentially connected, and the trained recognition unit is also connected with the Data Data acquisition unit, wherein institute
Trained recognition unit is stated for generating corresponding data category according to training sample gathered in advance and default training pattern；Institute
Taxon is stated for carrying out judgement classification to the data to be analyzed currently acquired according to the data category；The fault pre-alarming
Unit is used to export pre-warning signal when current data to be analyzed are judged as abnormal vibrations data category.In the present embodiment, pass through
The data of lathe continuous work change to the vibration of time, fault time as training sample, record in acquisition a period of time in advance
Operating condition, and classification is trained to collected training sample by default training pattern, SVM algorithm progress specifically can be used
Training sample is divided into two classes in the present embodiment and generates corresponding data category by classification, and data when normal work are one kind,
It is defined as normal vibration data category, the data that abnormal vibration changes before failure are one kind, it is defined as abnormal vibrations data category,
It is subsequent then by presetting training pattern, judgement point is carried out to the new data to be analyzed currently acquired according to these two types of data categories
Class, and then distinguishing new collected data is normal vibration data classification or abnormal vibrations data category, when being judged as extremely
Pre-warning signal is exported when vibration data classification, early warning is made before failure generation, realizes to the function of fault pre-alarming, avoid lathe
Cutter long-time abnormal work leads to equipment damage, improves the intelligence degree of vibration detection.
Based on above-mentioned cutting tool for CNC machine vibration signal detection system, the present invention correspondingly provides a kind of cutting tool for CNC machine
Vibration signal detection method, as shown in figure 20, the cutting tool for CNC machine vibration signal detection method include the following steps:
S10, vibration cutting information is detected by the vibration signal acquisition device being fixed on numerically-controlled machine tool knife platform and is exported corresponding
Detect signal；
S20, data to be analyzed are exported after carrying out differential amplification processing to the detection signal received；
S30, data category according to the pre-stored data carry out judgement classification to the data to be analyzed currently acquired, and different being judged as
Pre-warning signal is exported when normal vibration data classification.
The step S30 comprising steps of
S301, corresponding data category is generated according to training sample gathered in advance and default training pattern；
S302, judgement classification is carried out to the data to be analyzed currently acquired according to the data category；
S303, pre-warning signal is exported when current data to be analyzed are judged as abnormal vibrations data category.
Since the cutting tool for CNC machine vibration signal detection system being described in detail above, do not make herein in detail
It states.
In conclusion in cutting tool for CNC machine vibration signal detection system provided by the invention and detection method, the number
Control machine tool vibration signal detection system includes vibration signal acquisition device, data processing module and analytical judgment module；Institute
Vibration signal acquisition device is stated to be fixed on numerically-controlled machine tool knife platform and be electrically connected with data processing module, the vibration signals collecting
Device is for detecting vibration cutting information and exporting corresponding detection signal to data processing module；The data processing module is also
It is electrically connected with module is analyzed and determined, for exporting data to be analyzed extremely after carrying out differential amplification processing to the detection signal received
Analyze and determine module；The analytical judgment module is for data category according to the pre-stored data to the data to be analyzed currently acquired
Judgement classification is carried out, exports pre-warning signal when being judged as abnormal vibrations data category.It is fixed on by encapsulation rigid on lathe
Property vibration signal acquisition device, the running state information of contactless acquisition machine tool, and based on preparatory training identification
Data category realizes the fault detection and early warning to vibration cutting signal, has high sensitivity, non-contact detection, measurement identification
The advantages that precision is high.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of cutting tool for CNC machine vibration signal detection system, which is characterized in that at vibration signal acquisition device, data
It manages module and analyzes and determines module；The vibration signal acquisition device is fixed on numerically-controlled machine tool knife platform and and data processing module
Electrical connection, the vibration signal acquisition device is for detecting vibration cutting information and exporting corresponding detection signal to data processing
Module；The data processing module is also electrically connected with module is analyzed and determined, is put for carrying out difference to the detection signal received
Data to be analyzed are exported after big processing to analyzing and determining module；The analytical judgment module is used for data class according to the pre-stored data
It is other that judgement classification is carried out to the data to be analyzed currently acquired, pre-warning signal is exported when being judged as abnormal vibrations data category.
2. cutting tool for CNC machine vibration signal detection system according to claim 1, which is characterized in that the vibration signal
Acquisition device includes the protective shell being fixed on numerically-controlled machine tool knife platform, and is pasted onto surface inside the protective shell and has and split
The flexible foil gauge of line array, the surface of the flexibility foil gauge are also coated with conductive coating, the both ends of the flexibility foil gauge
It is provided with the contact conductor being electrically connected with the data processing module, the flexibility foil gauge exports real according to vibration cutting information
The resistance value of Shi Bianhua is to data processing module.
3. cutting tool for CNC machine vibration signal detection system according to claim 2, which is characterized in that the protective shell packet
Pedestal and outside protective covers are included, the pedestal includes substrate, and support frame, the both ends of the flexibility foil gauge are provided on the substrate
The middle section at the corresponding both ends for being pasted on support frame as described above, support frame as described above has the first groove, the surrounding of support frame as described above
It is additionally provided with the frame with outside protective covers cooperation；The bottom of the outside protective covers is provided with the second groove, outside the protection
Cover and pedestal are integrated by the frame and the assembly of the second groove, and the side of the outside protective covers is additionally provided with threading hole.
4. cutting tool for CNC machine vibration signal detection system according to claim 3, which is characterized in that set on the substrate
It is equipped with the first screw hole, position corresponding with first screw hole is provided with the second screw hole on the outside protective covers, passes through
The vibration signal acquisition device is fixed on numerically-controlled machine tool knife after first screw hole and the second screw hole by connector
On platform, to realize contactless machine tool vibration information acquisition.
5. cutting tool for CNC machine vibration signal detection system according to claim 4, which is characterized in that the frame and
Sealant is provided between two grooves and in the threading hole.
6. cutting tool for CNC machine vibration signal detection system according to claim 2, which is characterized in that the data processing
Module includes converting unit, differential amplification unit and data acquisition unit；The converting unit and the flexible foil gauge and difference
Divide amplifying unit electrical connection, for exporting after the real-time change resistance value of flexible foil gauge is converted to corresponding voltage signal to difference
Divide amplifying unit；The differential amplification unit is connect with data acquisition unit, for carrying out Difference Calculation to the voltage signal
And discrete signal is exported after enhanced processing to data acquisition unit；The data acquisition unit is also connect with module is analyzed and determined,
Data to be analyzed are exported after discrete signal for acquiring differential amplification unit output to analyzing and determining module.
7. cutting tool for CNC machine vibration signal detection system according to claim 6, which is characterized in that the converting unit
For Wheatstone bridge, the flexibility foil gauge is connected by the contact conductor at both ends and the empty bridge arm of Wheatstone bridge, the favour
The output end of stone electric bridge connects the differential amplification unit.
8. cutting tool for CNC machine vibration signal detection system according to claim 1, which is characterized in that the analytical judgment
Module includes training recognition unit, taxon and fault pre-alarming unit；The trained recognition unit is used for according to acquisition in advance
Training sample and default training pattern generate corresponding data category；The taxon is used for according to the data category
Judgement classification is carried out to the data to be analyzed currently acquired；The fault pre-alarming unit is used to be judged as in current data to be analyzed
Pre-warning signal is exported when abnormal vibrations data category.
9. a kind of cutting tool for CNC machine vibration signal detection method, which comprises the steps of:
By the vibration signal acquisition device detection vibration cutting information being fixed on numerically-controlled machine tool knife platform and export corresponding detection
Signal；
Data to be analyzed are exported after carrying out differential amplification processing to the detection signal received；
Data category according to the pre-stored data carries out judgement classification to the data to be analyzed currently acquired, and is being judged as abnormal vibration
Pre-warning signal is exported when dynamic data category.
10. cutting tool for CNC machine vibration signal detection method according to claim 9, which is characterized in that the basis is pre-
The data category first stored carries out judgement classification to the data to be analyzed currently acquired, and is being judged as abnormal vibrations data category
When output pre-warning signal the step of include:
Corresponding data category is generated according to training sample gathered in advance and default training pattern；
Judgement classification is carried out to the data to be analyzed currently acquired according to the data category；
Pre-warning signal is exported when current data to be analyzed are judged as abnormal vibrations data category.
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